EP1644913B1 - Dispositif d'affichage et circuit de commande d'un modulateur de lumiere - Google Patents
Dispositif d'affichage et circuit de commande d'un modulateur de lumiere Download PDFInfo
- Publication number
- EP1644913B1 EP1644913B1 EP04767476.7A EP04767476A EP1644913B1 EP 1644913 B1 EP1644913 B1 EP 1644913B1 EP 04767476 A EP04767476 A EP 04767476A EP 1644913 B1 EP1644913 B1 EP 1644913B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- modulator
- operational amplifier
- voltage
- gate electrode
- control
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
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Images
Classifications
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- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
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- 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
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
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- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3258—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
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- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- G09G2300/04—Structural and physical details of display devices
- G09G2300/0404—Matrix technologies
- G09G2300/0417—Special arrangements specific to the use of low carrier mobility technology
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- G09G2300/0439—Pixel structures
- G09G2300/0465—Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
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- G09G2300/0876—Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes
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- G09G2320/00—Control of display operating conditions
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- G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
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- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2011—Display of intermediate tones by amplitude modulation
Definitions
- an addressing circuit of this type comprises control means and power supply means of the transmitter. It is controlled by a network of row and column electrodes. These electrodes make it possible to select and then address a specific emitter E among all the emitters of the display panel.
- the modulator M converts a data control voltage of one pixel or a sub-pixel into an electric current passing through it.
- the modulator M is a transistor component of MOSFET type n or p. Such components comprise three terminals: a drain and a source between which the modulated current flows, and a gate to which the control voltage is applied.
- figure 1 of OLED displays with a classical structure it is the anode of the emitters that forms the interface with the active matrix: the drain (n-type case) or the source (p-type case) of the modulators is then connected to the electrode Vdd power supply, and the cathode of the emitters is connected to the ground electrode.
- the drain (n-type case) or the source (p-type case) of the modulators is then connected to the electrode Vdd power supply, and the cathode of the emitters is connected to the ground electrode.
- LTPS low temperature polycrystalline silicon
- the crystalline poly-silicon modulators M composing the same display panel and powered by the same supply voltage Vdd will generate currents of different intensity, even when these are controlled by Vdata data voltages. identical.
- an emitter E generally emits a luminous intensity directly proportional to the current flowing through it, so that the heterogeneity of the triggering thresholds of the crystalline poly-silicon transistors causes non-uniformity of brightness of a screen formed by a matrix of such transistors. This results in differences in luminance levels and obvious visual discomfort for the user.
- the figure 3 represents an element of an image display device according to a first embodiment of the present invention.
- This element comprises a light emitter E and the addressing circuit 10 associated therewith.
- the modulator is n-type and the emitter is an OLED type diode with a so-called conventional structure.
- the same circuit is also applicable to reverse structure OLED displays provided that p-type modulators are used and that the modulator-transmitter series is reversed, ie the anode of the emitters is connected to the electrode. Vdd supply and the drain of the modulators to the ground electrode.
- the addressing circuit comprises an operational amplifier 11, which compensates the trigger threshold voltage Vth of the current modulators M.
- the addressing circuit may also comprise an additional switch I2 connected between the source of the modulator M and the inverting terminal (-) of the operational amplifier 11 to enable the feedback operation of the latter.
- This second switch 12 secures the addressing of a transmitter. It avoids the possible appearance of leakage current in another addressing circuit located on the same column as the selected transmitter.
- the supply voltage Vdd of the transmitter is connected here to the source of the modulator M via a passive component R. Since the modulator is of the P type, the drain of the modulator is here connected to the anode of the light emitter E. When a data control voltage Vdata is applied to the gate of the p-type modulator, a drain current passes through the modulator, from its source to its source. drain.
- the current flowing through the modulator and the emitter E is independent of its trigger threshold voltage.
- the drain current is directly controllable by the data voltage Vdata. For a fixed data control voltage, the drain current is therefore constant.
- the first I1 and second I2 control switches being closed, as explained above, the data control voltage Vdata i is applied to the source of the modulator M in .
- the tripping threshold voltage of this modulator is compensated by the output of the column amplifier A in , and the modulator M in emits a drain current into the emitter E in .
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of El Displays (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0308127A FR2857146A1 (fr) | 2003-07-03 | 2003-07-03 | Dispositif d'affichage d'images a matrice active |
PCT/FR2004/001629 WO2005013250A1 (fr) | 2003-07-03 | 2004-06-25 | Dispositif d'affichage et circuit de commande d’un modulateur de lumiere |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1644913A1 EP1644913A1 (fr) | 2006-04-12 |
EP1644913B1 true EP1644913B1 (fr) | 2013-08-07 |
Family
ID=33522734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04767476.7A Expired - Lifetime EP1644913B1 (fr) | 2003-07-03 | 2004-06-25 | Dispositif d'affichage et circuit de commande d'un modulateur de lumiere |
Country Status (9)
Country | Link |
---|---|
US (1) | US7557778B2 (ko) |
EP (1) | EP1644913B1 (ko) |
JP (2) | JP2007516454A (ko) |
KR (1) | KR101391813B1 (ko) |
CN (1) | CN100433109C (ko) |
FR (1) | FR2857146A1 (ko) |
MX (1) | MXPA05014178A (ko) |
TW (1) | TWI376975B (ko) |
WO (1) | WO2005013250A1 (ko) |
Families Citing this family (83)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2443206A1 (en) | 2003-09-23 | 2005-03-23 | Ignis Innovation Inc. | Amoled display backplanes - pixel driver circuits, array architecture, and external compensation |
JP2005157123A (ja) * | 2003-11-27 | 2005-06-16 | Dainippon Printing Co Ltd | 有機el表示装置 |
JP2005331933A (ja) * | 2004-04-20 | 2005-12-02 | Dainippon Printing Co Ltd | 有機el表示装置 |
CA2490858A1 (en) | 2004-12-07 | 2006-06-07 | Ignis Innovation Inc. | Driving method for compensated voltage-programming of amoled displays |
EP2688058A3 (en) | 2004-12-15 | 2014-12-10 | Ignis Innovation Inc. | Method and system for programming, calibrating and driving a light emitting device display |
US10012678B2 (en) | 2004-12-15 | 2018-07-03 | Ignis Innovation Inc. | Method and system for programming, calibrating and/or compensating, and driving an LED display |
US8576217B2 (en) | 2011-05-20 | 2013-11-05 | Ignis Innovation Inc. | System and methods for extraction of threshold and mobility parameters in AMOLED displays |
US9280933B2 (en) | 2004-12-15 | 2016-03-08 | Ignis Innovation Inc. | System and methods for extraction of threshold and mobility parameters in AMOLED displays |
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JP2012230392A (ja) | 2012-11-22 |
CN100433109C (zh) | 2008-11-12 |
FR2857146A1 (fr) | 2005-01-07 |
CN1816837A (zh) | 2006-08-09 |
KR20070029539A (ko) | 2007-03-14 |
MXPA05014178A (es) | 2006-07-03 |
US7557778B2 (en) | 2009-07-07 |
TW200505268A (en) | 2005-02-01 |
JP5688051B2 (ja) | 2015-03-25 |
KR101391813B1 (ko) | 2014-05-07 |
JP2007516454A (ja) | 2007-06-21 |
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