WO2005001805A1 - Image degradation correction in novel liquid crystal displays with split blue subpixels - Google Patents
Image degradation correction in novel liquid crystal displays with split blue subpixels Download PDFInfo
- Publication number
- WO2005001805A1 WO2005001805A1 PCT/US2004/018036 US2004018036W WO2005001805A1 WO 2005001805 A1 WO2005001805 A1 WO 2005001805A1 US 2004018036 W US2004018036 W US 2004018036W WO 2005001805 A1 WO2005001805 A1 WO 2005001805A1
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- WO
- WIPO (PCT)
- Prior art keywords
- subpixels
- liquid crystal
- crystal display
- panel
- column
- Prior art date
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Classifications
-
- 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
- G09G3/36—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 liquid crystals
-
- 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
- G09G3/36—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 liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- 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
- G09G3/36—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 liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0439—Pixel structures
- G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
-
- 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
- G09G2320/0204—Compensation of DC component across the pixels in flat panels
-
- 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
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
-
- 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
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
-
- 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
- G09G3/36—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 liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
Definitions
- FIG. 1A shows a conventional RGB stripe panel having a lxl dot inversion scheme.
- FIG. IB shows a conventional RGB stripe panel having a 1x2 dot inversion scheme.
- FIG. 2 shows a panel having a novel subpixel repeating group with an even number of pixels in a first (row) direction.
- FIG. 3 depicts a panel having the repeating grouping of FIG.
- FIG. 4 depicts the phase relationships for the multiple driver chips of FIG. 3.
- FIG. 5 depicts a panel having the subpixel repeating group of FIG. 2 wherein the driver chip driving the panel is a 4-phase chip wherein any degradation of the image is placed onto the blue subpixels.
- FIG. 6 depicts a panel having a subpixel repeating group having two narrow columns of blue subpixels wherein substantially all or most of the degradation of the image is placed onto the narrow blue subpixel columns.
- FIG. 1A shows a conventional RGB stripe structure on panel 100 for an Active Matrix Liquid Crystal Display (AMLCD) having thin film transistors (TFTs) 116 to activate individual colored subpixels - red 104, green 106 and blue 108 subpixels respectively.
- AMLCD Active Matrix Liquid Crystal Display
- TFTs thin film transistors
- a red, a green and a blue subpixel form a repeating group of subpixels 102 that comprise the panel.
- each subpixel is connected to a column line (each driven by a column driver 110) and a row line (e.g. 112 and 114).
- a dot inversion scheme to reduce crosstalk or flicker.
- FIG. 1A depicts one particular dot inversion scheme - i.e. lxl dot inversion - that is indicated by a "+" and a "-" polarity given in the center of each subpixel.
- Each row line is typically connected to a gate (not shown in FIG. 1A) of TFT 116.
- Image data - delivered via the column lines - are typically connected to the source of each TFT.
- Image data is written to the panel a row at a time and is given a polarity bias scheme as indicated herein as either ODD ("O") or EVEN ("E") schemes.
- row 112 is being written with ODD polarity scheme at a given time while row 114 is being written with EVEN polarity scheme at a next time.
- the polarities alternate ODD and EVEN schemes a row at a time in this lxl dot inversion scheme.
- FIG. IB depicts another conventional RGB stripe panel having another dot inversion scheme - i.e. 1x2 dot inversion.
- the polarity scheme changes over the course of two rows - as opposed to every row, as in lxl dot inversion.
- FIG. 2 shows a panel comprising a repeat subpixel grouping 202, as further described in the '353 application.
- repeat subpixel grouping 202 is an eight subpixel repeat group, comprising a checkerboard of red and blue subpixels with two columns of reduced-area green subpixels in between. If the standard lxl dot inversion scheme is applied to a panel comprising such a repeat grouping (as shown in FIG. 2), then it becomes apparent that the property described above for RGB striped panels (namely, that successive colored pixels in a row and/or column have different polarities) is now violated.
- This condition may cause a number of visual defects noticed on the panel - particularly when certain image patterns are displayed.
- This observation also occurs with other novel subpixel repeat grouping - for example, the subpixel repeat grouping in FIG. 1 of the '352 application - and other repeat groupings that are not an odd number of repeating subpixels across a row.
- the repeat grouping of FIG. 2 in the present application has four (i.e. an even number) of subpixels in its repeat group across a row (e.g. R, G, B, and G).
- FIG. 3 shows an even modulo pixel layout which utilizes 2x1 dot inversion. Vertical image degradation is eliminated since same color pixels alternate in polarity. Horizontal image degradation due to same-color pixels is reduced by changing the phase of the dot inversion periodically.
- Driver chips 301 A through D provide data to the display; the driver outputs are driven +,-,+,-,...
- a subpixel - bordered on either side by column lines driving the same polarity at a given time — may suffer a decreased luminance for any given image signal. So, two goals are to reduce the number of effected subpixels — and to reduce the image degradation effects of any particular subpixel that cannot avoid having been so impacted. Several techniques in this application and in other related applications incorporated herein are designed to minimize both the number and the effects of image degraded subpixels.
- One such technique is to choose which subpixels are to be degraded, if degradation may not be avoided.
- the phasing is designed so as to localize the same- polarity occurrence on the circled blue subpixels 302. In this manner, the polarity of same color subpixels along a row is inverted every two driver chips, which will minimize or eliminate the horizontal image degradation.
- the periodic circled blue subpixels 302 will be slightly darker (i.e for normally-black LCD) or lighter (i.e. for normally-white LCD) than other blue subpixels in the array, but since the eye is not as sensitive to blue luminance changes, the difference should be substantially less visible.
- Yet another technique is to add a correction signal to any effected subpixels.
- a four-phase clock for example, is used for polarity inversion.
- this pattern or patterns similar, only the blue subpixels in the array will have the same-polarity degradation. However, since all pixels are equally degraded, it will be substantially less visible to the human eye. If desired, a correction signal can be applied to compensate for the darker or lighter blue subpixels.
- These drive waveforms can be generated with a data driver chip that provides for a more complex power-supply switching system than employed in the relatively simple alternate polarity reversal designs. In this two-stage data driver design, the analog signals are generated as they are done now in the first stage.
- Yet another embodiment of the techniques described herein is to localize the image degradation effect on a subset of blue subpixels across the panel in both the row and column directions. For example, a "checkerboard" of blue subpixels (i.e. skipping every other blue subpixel in either the row and/or column direction) might be used to localize the image degradation signal. As noted above, the human eye - with its decreased sensitivity in blue color spatial resolution - will be less likely to notice the error. It will be appreciated that other subsets of blue subpixels could be chosen to localize the error.
- FIG. 6 is yet another embodiment of a panel 600 comprised substantially of a subpixel repeating group 602 of even modulo.
- group 602 is comprised of a checkerboard of red 104 and green 106 subpixels interspersed with two columns of blue 108 subpixels.
- red 104 and green 106 subpixels interspersed with two columns of blue 108 subpixels.
- blue subpixels it is possible (but not mandatory) to have the blue subpixels of smaller width than the red or the green subpixels.
- two neighboring columns of blue subpixels may share a same column driver through an interconnect 604, possibly with the TFTs of the blue subpixels appropriately remapped to avoid exact data value sharing.
- blue subpixel column 606 has the same polarity as the column of red and green subpixels to its immediate right. Although this may induce image degradation (which may be compensated for with some correction signal), it is advantageous that the degradation is localized on the dark colored (e.g. blue) subpixel column; and, hence, less visible to the human eye.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006515263A JP4718454B2 (en) | 2003-06-06 | 2004-06-04 | Image degradation correction of a novel liquid crystal display with segmented blue sub-pixels |
EP04754603A EP1647008A4 (en) | 2003-06-06 | 2004-06-04 | Image degradation correction in novel liquid crystal displays with split blue subpixels |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/456,839 | 2003-06-06 | ||
US10/456,839 US20040246280A1 (en) | 2003-06-06 | 2003-06-06 | Image degradation correction in novel liquid crystal displays |
US10/696,236 | 2003-10-28 | ||
US10/696,236 US8436799B2 (en) | 2003-06-06 | 2003-10-28 | Image degradation correction in novel liquid crystal displays with split blue subpixels |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005001805A1 true WO2005001805A1 (en) | 2005-01-06 |
Family
ID=33555068
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/018036 WO2005001805A1 (en) | 2003-06-06 | 2004-06-04 | Image degradation correction in novel liquid crystal displays with split blue subpixels |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1647008A4 (en) |
KR (1) | KR101028664B1 (en) |
TW (1) | TWI284878B (en) |
WO (1) | WO2005001805A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008079197A1 (en) * | 2006-12-27 | 2008-07-03 | Eastman Kodak Company | Electronic display having improved uniformity |
JP4781351B2 (en) * | 2005-04-22 | 2011-09-28 | シャープ株式会社 | Display device |
US9214121B2 (en) | 2010-01-20 | 2015-12-15 | Semiconductor Energy Laboratory Co., Ltd. | Driving method of liquid crystal display device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI406249B (en) | 2009-06-02 | 2013-08-21 | Sitronix Technology Corp | Driving circuit for dot inversion of liquid crystals |
Citations (3)
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US5161202A (en) | 1990-07-18 | 1992-11-03 | Dainippon Screen Mfg. Co. Ltd. | Method of and device for inspecting pattern of printed circuit board |
US20020015110A1 (en) * | 2000-07-28 | 2002-02-07 | Clairvoyante Laboratories, Inc. | Arrangement of color pixels for full color imaging devices with simplified addressing |
US20030090581A1 (en) | 2000-07-28 | 2003-05-15 | Credelle Thomas Lloyd | Color display having horizontal sub-pixel arrangements and layouts |
Family Cites Families (8)
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GB9705703D0 (en) * | 1996-05-17 | 1997-05-07 | Philips Electronics Nv | Active matrix liquid crystal display device |
KR100209605B1 (en) * | 1996-12-23 | 1999-07-15 | 구자홍 | Lcd device |
KR100303206B1 (en) * | 1998-07-04 | 2001-11-30 | 구본준, 론 위라하디락사 | Dot-inversion liquid crystal panel drive device |
KR100302132B1 (en) * | 1998-10-21 | 2001-12-01 | 구본준, 론 위라하디락사 | Cycle inversion type liquid crystal panel driving method and device therefor |
JP3365357B2 (en) * | 1999-07-21 | 2003-01-08 | 日本電気株式会社 | Active matrix type liquid crystal display |
US6115092A (en) * | 1999-09-15 | 2000-09-05 | Rainbow Displays, Inc. | Compensation for edge effects and cell gap variation in tiled flat-panel, liquid crystal displays |
JP3745259B2 (en) * | 2001-09-13 | 2006-02-15 | 株式会社日立製作所 | Liquid crystal display device and driving method thereof |
US20050179675A1 (en) * | 2002-05-27 | 2005-08-18 | Koninklijke Phillips Electonics N.C. | Pixel fault masking |
-
2004
- 2004-06-04 TW TW093116106A patent/TWI284878B/en active
- 2004-06-04 KR KR1020057023350A patent/KR101028664B1/en active IP Right Grant
- 2004-06-04 EP EP04754603A patent/EP1647008A4/en not_active Ceased
- 2004-06-04 WO PCT/US2004/018036 patent/WO2005001805A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5161202A (en) | 1990-07-18 | 1992-11-03 | Dainippon Screen Mfg. Co. Ltd. | Method of and device for inspecting pattern of printed circuit board |
US20020015110A1 (en) * | 2000-07-28 | 2002-02-07 | Clairvoyante Laboratories, Inc. | Arrangement of color pixels for full color imaging devices with simplified addressing |
US20030090581A1 (en) | 2000-07-28 | 2003-05-15 | Credelle Thomas Lloyd | Color display having horizontal sub-pixel arrangements and layouts |
Non-Patent Citations (1)
Title |
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See also references of EP1647008A4 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4781351B2 (en) * | 2005-04-22 | 2011-09-28 | シャープ株式会社 | Display device |
WO2008079197A1 (en) * | 2006-12-27 | 2008-07-03 | Eastman Kodak Company | Electronic display having improved uniformity |
US8013817B2 (en) | 2006-12-27 | 2011-09-06 | Global Oled Technology Llc | Electronic display having improved uniformity |
US9214121B2 (en) | 2010-01-20 | 2015-12-15 | Semiconductor Energy Laboratory Co., Ltd. | Driving method of liquid crystal display device |
US9448451B2 (en) | 2010-01-20 | 2016-09-20 | Semiconductor Energy Laboratory Co., Ltd. | Driving method of liquid crystal display device |
Also Published As
Publication number | Publication date |
---|---|
KR20060015639A (en) | 2006-02-17 |
KR101028664B1 (en) | 2011-04-12 |
EP1647008A1 (en) | 2006-04-19 |
TW200527362A (en) | 2005-08-16 |
TWI284878B (en) | 2007-08-01 |
EP1647008A4 (en) | 2007-08-01 |
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