EP2706397B1 - Liquid crystal display - Google Patents

Liquid crystal display Download PDF

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Publication number
EP2706397B1
EP2706397B1 EP11865403.7A EP11865403A EP2706397B1 EP 2706397 B1 EP2706397 B1 EP 2706397B1 EP 11865403 A EP11865403 A EP 11865403A EP 2706397 B1 EP2706397 B1 EP 2706397B1
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EP
European Patent Office
Prior art keywords
liquid crystal
electrode
pixel
voltage
common
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.)
Active
Application number
EP11865403.7A
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German (de)
French (fr)
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EP2706397A4 (en
EP2706397A1 (en
Inventor
Dengxia Zhao
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Publication of EP2706397A4 publication Critical patent/EP2706397A4/en
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    • 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
    • G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
    • 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
    • G09G3/3666—Control of matrices with row and column drivers using an active matrix with the matrix divided into sections
    • 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
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/043—Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver
    • 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
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0852—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor being a dynamic memory with more than one capacitor
    • 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
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • 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
    • 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

Definitions

  • the present invention relates to the field of screen technology, in particular a liquid crystal screen.
  • the features of the preamble of claim 1 are in US 2010/0277399 A1 disclosed.
  • the screen technology according to the prior art is also, for example, out US 2010/225831 A1 .
  • the liquid crystal display is a flat screen that is currently widely used.
  • the principle of operation of the liquid crystal display is to change the arrangement form of the liquid crystal molecules in the liquid crystal layer with the voltage difference between two ends of the liquid crystal layer in order to change the light transmission of the liquid crystal layer and then display the image together with the light source supplied by the backlight module.
  • FIG. 1 is a schematic representation of the circuit of the liquid crystal screen in the prior art.
  • the liquid crystal screen has a liquid crystal panel 110, a common voltage generator 15, a scanner driver 17 and a data driver 16.
  • the liquid crystal panel 110 has a plurality of scan lines 9 and a plurality of data lines 14.
  • the scan lines 9 and the data lines 14 cross in isolation from one another and define a multiplicity of pixel units 100 which are arranged in a matrix.
  • a thin-film transistor 10, a liquid crystal capacitor 12 and a storage capacitor 13 are arranged within each pixel unit 100.
  • the liquid crystal capacitor 12 has a pixel electrode 121, a common electrode 122 and an intermediate liquid crystal layer which are arranged opposite one another.
  • the storage capacitor 13 has pixel electrodes 121, a storage electrode 132 and insulating material (not shown) between the pixel electrodes and the storage electrode, which are arranged opposite to each other.
  • parasitic capacitors 11 are usually formed on the data lines 14, the common electrode 122 and the liquid crystal layer between the data lines and the common electrode.
  • the thin film transistor 10 has a gate electrode, a source electrode and a drain electrode.
  • the gate electrode is connected to the scan line 9
  • the source electrode is connected to the data line 14
  • the drain electrode is connected to the pixel electrode 121.
  • the scanner driver 17 outputs a plurality of scanner signals on each scanning line 9 in order.
  • the scanner driver 17 outputs the scanner signal on a line of scan line 9
  • the thin-film transistor 10 connected to the scan line 9 is switched.
  • the data driver 16 supplies a plurality of data lines 14 to a plurality of gray level voltages, so that the gray level voltage is charged by the source and drain electrodes of the switched thin film transistor 10 on the pixel electrode 121.
  • the common voltage generator 15 provides the common electrode 222 and the storage electrode 132 with the common voltage Vcom. After the gray level voltage is charged to the pixel electrode 121 via the source and drain electrodes of the switched thin film transistor 10 because there is a voltage difference between the common voltage and the gray level voltage at the liquid crystal capacitor 12, the liquid crystal deviates so that the required gray level is in accordance with the angle of deviation of the liquid crystal is displayed.
  • the function of the storage capacitor 13 is to hold the gray level voltage on the pixel electrode 121 so that the gray level voltage is held on the pixel electrode 121 until the next gray level voltage arrives.
  • the arrangement of the pixel units 100 in one area in one embodiment of the liquid crystal screen is shown here.
  • the area is a pixel area of 3 ⁇ 3, A stands for the pixel units 100 in the middle, and B stands for the pixel units in the vicinity.
  • the gray level voltage on the data lines 12 of the pixel units B increases because the voltage of the parasitic capacitor 11 of the pixel units B cannot change immediately , the voltage of the common electrode 122 of the pixel units B fluctuates, after which the voltage of the common electrode 122 of the bright pixel units A will also fluctuate.
  • the voltage of the common electrode 122 of the pixel units A will also fluctuate.
  • the main purpose of the present invention is to provide a liquid crystal display to reduce the coupling noise and improve the display quality of the liquid crystal display.
  • the liquid crystal screen according to the invention is defined in claim 1.
  • a liquid crystal screen comprising a liquid crystal panel which has a plurality of pixel units arranged in a matrix.
  • a liquid crystal capacitor is arranged within each pixel unit, the liquid crystal capacitor has a pixel electrode and a common electrode which are arranged opposite one another.
  • the liquid crystal screen also has a regulator for pixel voltage, the regulator for pixel voltage has a multiplicity of compensation capacitors and an amplifier with a gain factor.
  • An above compensation capacitor is arranged within each pixel unit, and the compensation capacitor has an above pixel electrode and a feedback common electrode which are arranged opposite to each other. The input of the amplifier with a gain factor is connected to the common electrode, the output is connected to the feedback common electrode.
  • the liquid crystal panel has a plurality of scan lines and a plurality of data lines, and a plurality of scan lines and a plurality of data lines cross in an isolated manner to define the pixel units.
  • Each pixel unit has a thin film transistor.
  • the thin film transistor has a gate electrode, a source electrode and a drain electrode. The gate electrode is connected to a scan line, the source electrode is connected to a data line, and the drain electrode is connected to the pixel electrode.
  • Each pixel unit preferably also has a storage capacitor, and the storage capacitor has an above pixel electrode and a storage electrode which are arranged opposite one another.
  • the storage electrode and the above common electrode receive the same common voltage.
  • the liquid crystal display screen preferably also has a generator of the common voltage, the generator of the common voltage makes the common voltage available to the storage electrode and the common electrode.
  • the liquid crystal screen preferably also has a scanner driver, the scanner driver makes the scanner signal available to the scanning lines.
  • the liquid crystal screen preferably also has a data driver; the data driver provides the gray level voltage to the data lines.
  • the capacitance value of the compensation capacitor is preferably twice as large as the capacitance value of the liquid crystal capacitor.
  • the liquid crystal screen may be a liquid crystal screen the size of which is equal to or less than 32 inches.
  • a liquid crystal screen comprising a liquid crystal panel which has a plurality of pixel units arranged in a matrix.
  • a liquid crystal capacitor is arranged within each pixel unit, the liquid crystal capacitor has a pixel electrode and a common electrode which are arranged opposite one another.
  • the liquid crystal display also has a regulator for pixel voltage, the regulator for pixel voltage receives the feedback common voltage from the common electrode and adjusts the voltage of the pixel electrode according to the feedback common voltage.
  • Each pixel unit preferably also has a storage capacitor, the storage capacitor has an above pixel electrode and a storage electrode which are arranged opposite one another.
  • the storage electrode and the above common electrode receive the same common voltage.
  • the controller for pixel voltage preferably has a large number of compensation capacitors and two amplifiers with an amplification factor.
  • An above compensation capacitor is arranged within each pixel unit, and the compensation capacitor has an above pixel electrode and a feedback common electrode which are arranged opposite to each other.
  • the liquid crystal screen consists of two vertically symmetrical parts.
  • the input of an amplification factor amplifier is connected to the common electrode of each pixel unit of the upper part, and the output is connected to the feedback common electrode of the compensation capacitor in each pixel unit of the upper part.
  • the input of the other gain amplifier is connected to the common electrode of each pixel unit of the lower part and the output is connected to the feedback common electrode of the compensation capacitor in each pixel unit of the lower part.
  • the liquid crystal panel has a plurality of scan lines and a plurality of data lines, and a plurality of scan lines and a plurality of data lines cross in an isolated manner to define the pixel units.
  • Each pixel unit has a thin film transistor.
  • the thin film transistor has a gate electrode, a source electrode and a drain electrode. The gate electrode is connected to a scan line, the source electrode is connected to a data line, and the drain electrode is connected to the pixel electrode.
  • the liquid crystal display screen preferably also has a generator of the common voltage, the generator of the common voltage makes the common voltage available to the storage electrode and the common electrode.
  • the liquid crystal screen preferably also has a scanner driver, the scanner driver makes the scanner signal available to the scanning lines.
  • the liquid crystal screen preferably also has a data driver; the data driver provides the gray level voltage to the data lines.
  • the capacitance value of the compensation capacitor is preferably twice as large as the capacitance value of the liquid crystal capacitor.
  • the liquid crystal screen can be a liquid crystal screen whose size is larger than 32 inches.
  • the size of the liquid crystal screen is preferably 37 inches or 40 inches.
  • the liquid crystal display of the present invention further has a regulator for pixel voltage.
  • the pixel voltage regulator can receive the feedback common voltage from the common electrode and adjust the voltage of the pixel electrode according to the feedback common voltage so that the voltage of the pixel electrode changes in synchronism with the common voltage, after which the fluctuation of the common voltage Vcom is compensated. the coupling noise phenomenon is effectively improved and the display quality of the liquid crystal display is improved.
  • FIG. 10 is a schematic diagram of the circuit of the first embodiment of the liquid crystal display according to the present invention.
  • the liquid crystal screen has a liquid crystal panel 210, a common voltage generator 25, a regulator for pixel voltage, a scanner driver 27 and a data driver 26.
  • the pixel voltage regulator has a plurality of compensation capacitors 28 and an amplifier with an amplification factor 29.
  • the liquid crystal screen may be a liquid crystal screen whose size is equal to or less than 32 inches.
  • the liquid crystal panel 210 has a plurality of scan lines 30 and a plurality of data lines 24.
  • the scan lines 30 and the data lines 24 cross in an isolated manner, so that a multiplicity of pixel units 200 arranged in a matrix-like manner are defined.
  • a thin film transistor 20, a liquid crystal capacitor 22, a storage capacitor 23 and an above compensation capacitor 28 are arranged within each pixel unit 200.
  • the liquid crystal capacitor 22 has a pixel electrode 221, a common electrode 222 and an intermediate liquid crystal layer (not shown), which are arranged opposite to each other.
  • the storage capacitor 23 has a pixel electrode 221, a storage electrode 232, and insulating material (not shown) between the pixel electrodes and the storage electrode, which are arranged opposite to each other.
  • the compensation capacitor 28 has a pixel electrode 221, a feedback common electrode 282, and insulating material (not shown) between the pixel electrodes and the feedback common electrode, which are arranged opposite to each other.
  • parasitic capacitors 21 are usually formed on the data lines 24, the common electrode 222 and the liquid crystal layer between the data lines and the common electrode.
  • the input of an amplifier with amplification factor 29 is connected via feedback line 31 to the common electrode 222 of each pixel unit 200, and the output is connected to the feedback common electrode 282 of the compensation capacitor 28 within each pixel unit 200.
  • the gain 29 amplifier receives the feedback common voltage VCOM 'from the common voltage 222 and increases the thrust of the current so that the voltage of the feedback common electrode 282 of the compensation capacitor 28 is quickly charged or discharged to the feedback common voltage VCOM'.
  • the thin film transistor 20 has a gate electrode, a source electrode and a drain electrode.
  • the gate electrode is connected to scan lines 30, the source electrode is connected to data line 24, and the drain electrode is connected to pixel electrode 221.
  • the scanner driver 27 outputs a plurality of scanner signals on each scanning line 30 in order.
  • the scanner driver 27 outputs the scanner signal on a line of scan line 30, the thin film transistor 20 connected to the scan line 30 is switched.
  • the data driver 26 supplies a plurality of data lines 24 to a plurality of gray level voltages, so that the gray level voltage is charged on the pixel electrode 221 by the source and drain electrodes of the switched thin-film transistor 20.
  • the common voltage generator 25 provides the common electrode 222 and the storage electrode 232 with the common voltage Vcom. After the gray level voltage is charged to the pixel electrode 221 via the source and drain electrodes of the switched thin film transistor 20 because there is a voltage difference between the common voltage and the gray level voltage at the liquid crystal capacitor 22, the liquid crystal in between deviates, so that the required one Grayscale is displayed according to the deviation angle of the liquid crystal.
  • the function of the storage capacitor 23 is to hold the gray level voltage at the pixel electrode 221 so that the gray level voltage at the pixel electrode 221 is held until the next gray level voltage arrives.
  • the capacitance value of the compensation capacitor 28 may be twice the capacitance value of the liquid crystal capacitor 22.
  • the liquid crystal display of the present invention further has a regulator for pixel voltage.
  • the common voltage VCOM on the storage electrode 232 and the common electrode 222 fluctuates due to the presence of the parasitic capacitor 21.
  • the amplifier with amplification factor 29 of the pixel voltage regulator receives the feedback from the common electrode 222 common voltage VCOM 'and quickly feeds the feedback common voltage VCOM' back to the feedback common electrode 282 of the compensation capacitor 28.
  • the voltage of the compensation capacitor 28 of the pixel voltage regulator cannot change immediately, the voltage of the pixel electrode 221 of the pixel unit 200 also changes when the voltage of the feedback common electrode 282 changes, so that the voltage of the pixel electrode 221 changes synchronously with that common voltage VCOM changes, after which the fluctuation of the common voltage Vcom is compensated for, the coupling noise phenomenon is effectively improved, and the display quality of the liquid crystal panel is improved.
  • FIG. 4 is a schematic diagram of the circuit of the second embodiment of the liquid crystal display according to the present invention.
  • the liquid crystal screen can be a Be a liquid crystal screen larger than 32 inches, such as 37 inches, 40 inches.
  • the liquid crystal panel of the second embodiment is substantially the same as the liquid crystal panel of the first embodiment, the difference is that the pixel voltage regulator of the liquid crystal panel of the second embodiment has two gain amplifiers, the liquid crystal panel consists of two vertically symmetrical parts (not shown) that Pixel units 300 of the upper part share a common amplifier with gain 39, and pixel units 300 of the lower part share the other common amplifier with gain 39.
  • the storage capacitor 38 has a pixel electrode 381, a feedback common electrode 382, and insulating material (not shown) between the pixel electrodes and the feedback common electrode 382, which are arranged opposite to each other.
  • the input of an amplification factor 39 amplifier is connected through feedback line 41 to the common electrode 322 of each pixel unit 300 of the upper part, and the output is connected to the feedback common electrode 382 of the compensation capacitor 38 in each pixel unit 300 of the upper part.
  • the input of the other gain 39 amplifier is connected through feedback line 41 to the common electrode 322 of each lower part pixel unit 300, and the output is connected to the common electrode feedback 382 of the compensation capacitor 38 in each lower part pixel unit 300.
  • the liquid crystal panel of the present invention is not limited to the first embodiment and the second embodiment.
  • the number of the gain amplifier is not limited to one or two, but can be increased in accordance with the size of the liquid crystal panel, and the arrangement and the position of the gain amplifier can also be adjusted as required.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
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  • Liquid Crystal Display Device Control (AREA)

Description

Technisches GebietTechnical field

Die vorliegende Erfindung betrifft das Gebiet der Bildschirmtechnik, insbesondere einen Flüssigkristallbildschirm. Die Merkmale des Oberbegriffs des Anspruches 1 sind in US 2010/0277399 A1 offenbart. Die Bildschirmtechnik nach dem Stand der Technik ist beispielsweise auch aus US 2010/225831 A1 , US 2004/169627 A1 und US 2010/060558 A1 bekannt.The present invention relates to the field of screen technology, in particular a liquid crystal screen. The features of the preamble of claim 1 are in US 2010/0277399 A1 disclosed. The screen technology according to the prior art is also, for example, out US 2010/225831 A1 . US 2004/169627 A1 and US 2010/060558 A1 known.

Stand der TechnikState of the art

Mit den Vorteilen, dass sie dünn und energiesparend ist und niedrige Strahlung hat, ist der Flüssigkristallbildschirm (Liquid Crystal Display, LCD) ein Flachbildschirm, das zur Zeit verbreitet verwendet wird. Das Arbeitsprinzip des Flüssigkristallbildschirms ist, mit der Spannungsdifferenz zwischen zwei Enden der Flüssigkristallschicht die Anordnungsform der Flüssigkristall-Moleküle in der Flüssigkristallschicht zu ändern, um die Lichtdurchlässigkeit der Flüssigkristallschicht zu ändern und dann zusammen mit der vom Hintergrundbeleuchtungsmodul versorgten Lichtquelle das Bild anzuzeigen.With the advantages that it is thin, energy-saving and has low radiation, the liquid crystal display (LCD) is a flat screen that is currently widely used. The principle of operation of the liquid crystal display is to change the arrangement form of the liquid crystal molecules in the liquid crystal layer with the voltage difference between two ends of the liquid crystal layer in order to change the light transmission of the liquid crystal layer and then display the image together with the light source supplied by the backlight module.

In Figur 1 wird eine schematische Darstellung der Schaltung des Flüssigkristallbildschirms im Stand der Technik dargestellt. Der Flüssigkristallbildschirm weist ein Flüssigkristallpaneel 110, einen Generator der gemeinsamen Spannung 15, einen Scanner-Treiber 17 und einen Daten-Treiber 16 auf. Das Flüssigkristallpaneel 110 weist eine Vielzahl von Abtastlinien 9 und eine Vielzahl von Datenleitungen 14 auf. Die Abtastlinien 9 und die Datenleitungen 14 queren voneinander isoliert und definieren eine Vielzahl von Pixel-Einheiten 100, die matrixartig angeordnet sind.In Figure 1 is a schematic representation of the circuit of the liquid crystal screen in the prior art. The liquid crystal screen has a liquid crystal panel 110, a common voltage generator 15, a scanner driver 17 and a data driver 16. The liquid crystal panel 110 has a plurality of scan lines 9 and a plurality of data lines 14. The scan lines 9 and the data lines 14 cross in isolation from one another and define a multiplicity of pixel units 100 which are arranged in a matrix.

Innerhalb jeder Pixel-Einheit 100 sind ein Dünnschichttransistor 10, ein Flüssigkristall-Kondensator 12 und ein Speicherkondensator 13 angeordnet. Der Flüssigkristall-Kondensator 12 weist eine Pixelelektrode 121, eine gemeinsame Elektrode 122 und eine dazwischen liegende Flüssigkristallschicht, die einander gegenüberliegend angeordnet sind. Der Speicherkondensator 13 weist Pixelelektroden 121, eine Speicherelektrode 132 und isolierendes Material (nicht dargestellt) zwischen den Pixelelektroden und der Speicherelektrode auf, die einander gegenüberliegend angeordnet sind. Darüber hinaus sind parasitäre Kondensatoren 11 üblicherweise auf den Datenleitungen 14, der gemeinsamen Elektrode 122 und der Flüssigkristallschicht zwischen den Datenleitungen und der gemeinsamer Elektrode ausgebildet.A thin-film transistor 10, a liquid crystal capacitor 12 and a storage capacitor 13 are arranged within each pixel unit 100. The liquid crystal capacitor 12 has a pixel electrode 121, a common electrode 122 and an intermediate liquid crystal layer which are arranged opposite one another. The storage capacitor 13 has pixel electrodes 121, a storage electrode 132 and insulating material (not shown) between the pixel electrodes and the storage electrode, which are arranged opposite to each other. In addition, parasitic capacitors 11 are usually formed on the data lines 14, the common electrode 122 and the liquid crystal layer between the data lines and the common electrode.

Der Dünnschichttransistor 10 weist eine Gate-Elektrode, eine Source-Elektrode und eine Drain-Elektrode auf. Die Gate-Elektrode ist mit der Abtastlinie 9 verbunden, und die Source-Elektrode ist mit der Datenleitung 14 verbunden, und die Drain-Elektrode ist mit der Pixel-Elektrode 121 verbunden.The thin film transistor 10 has a gate electrode, a source electrode and a drain electrode. The gate electrode is connected to the scan line 9, the source electrode is connected to the data line 14 and the drain electrode is connected to the pixel electrode 121.

Der Scanner-Treiber 17 gibt nach der Reihenfolge mehrere Scanner-Signale auf jede Abtastlinie 9 aus. Wenn der Scanner-Treiber 17 das Scanner-Signal auf eine Zeile Abtastlinie 9 ausgibt, ist der mit der Abtastlinie 9 verbundene Dünnschichttransistor 10 geschaltet. Gleichzeitig führt der Daten-Treiber 16 mehreren Datenleitungen 14 mehrere Graustufenspannungen zu, so dass die Graustufenspannung durch die Source- und Drain-Elektroden des geschalteten Dünnschichttransistors 10 auf der Pixelelektrode 121 geladen wird.The scanner driver 17 outputs a plurality of scanner signals on each scanning line 9 in order. When the scanner driver 17 outputs the scanner signal on a line of scan line 9, the thin-film transistor 10 connected to the scan line 9 is switched. At the same time, the data driver 16 supplies a plurality of data lines 14 to a plurality of gray level voltages, so that the gray level voltage is charged by the source and drain electrodes of the switched thin film transistor 10 on the pixel electrode 121.

Der Generator der gemeinsamen Spannung 15 stellt der gemeinsamen Elektrode 222 und der Speicherelektrode 132 die gemeinsame Spannung Vcom zur Verfügung. Nachdem die Graustufenspannung über die Source- und Drain-Elektroden des geschalteten Dünnschichttransistors 10 auf die Pixelelektrode 121 geladen wurde, weil ein Spannungsunterschied zwischen der gemeinsamen Spannung und der Graustufenspannung am Flüssigkristall-Kondensator 12 besteht, weicht das Flüssigkristall ab, so dass die erforderliche Graustufe gemäß dem Abweichungswinkel des Flüssigkristalls angezeigt wird. Die Funktion des Speicherkondensators 13 ist, die Graustufenspannung an der Pixel-Elektrode 121 zu halten, so dass die Graustufenspannung an der Pixelelektrode 121 gehalten wird, bis die nächste Graustufenspannung ankommt.The common voltage generator 15 provides the common electrode 222 and the storage electrode 132 with the common voltage Vcom. After the gray level voltage is charged to the pixel electrode 121 via the source and drain electrodes of the switched thin film transistor 10 because there is a voltage difference between the common voltage and the gray level voltage at the liquid crystal capacitor 12, the liquid crystal deviates so that the required gray level is in accordance with the angle of deviation of the liquid crystal is displayed. The function of the storage capacitor 13 is to hold the gray level voltage on the pixel electrode 121 so that the gray level voltage is held on the pixel electrode 121 until the next gray level voltage arrives.

Wie in Figur 2 dargestellt, wird hier die Anordnung der Pixel-Einheiten 100 in einem Bereich in einer Ausfuhrungsform des Flüssigkristallbildschirms dargestellt. Der Bereich ist ein Pixelbereich von 3∗3, A steht für die Pixeleinheiten 100 in der Mitte, und B steht für die Pixeleinheiten in der Umgebung.As in Figure 2 the arrangement of the pixel units 100 in one area in one embodiment of the liquid crystal screen is shown here. The area is a pixel area of 3 ∗ 3, A stands for the pixel units 100 in the middle, and B stands for the pixel units in the vicinity.

Eine Pixeleinheit A betrachtend, wenn die Graustufe des von den Pixeleinheiten B um die Pixeleinheiten A anzuzeigenden Bildes sich ändert, wird die bereitgestellte Graustufenspannung an den Datenleitungen 14 der Pixeleinheiten B sich gewiss ändern. Da jetzt die Spannung des parasitären Kondensators 11 der Pixeleinheiten B sich nicht sofort ändern kann, wird die Spannung der gemeinsamen Spannung der Pixeleinheiten B schwanken. Aber die gemeinsame Elektrode 122 jeder Pixeleinheit ist miteinander geschaltet, wonach wird die Spannung der gemeinsamen Elektrode 122 der Pixeleinheiten A auch schwanken. Z.B. den Flüssigkristallbildschirm des konstant hellen Typs betrachtend, wenn die Pixeleinheiten B um die helle Pixeleinheit A vom hellen Zustand gedimmt wird, erhöht sich die Graustufenspannung an den Datenleitungen 12 der Pixeleinheiten B. Da die Spannung des parasitären Kondensators 11 der Pixeleinheiten B sich nicht sofort ändern kann, erhöht sich die Spannung der gemeinsamen Elektrode 122 der Pixeleinheiten B schwankend, wonach wird die die Spannung der gemeinsamen Elektrode 122 der hellen Pixeleinheiten A auch sich schwankend erhöhen. Wenn die Pixeleinheiten B um die helle Pixeleinheit A vom dunklen Zustand hell wird, wird die Spannung der gemeinsamen Elektrode 122 der Pixeleinheiten A auch schwankend sinken.Looking at a pixel unit A, when the gray level of the image to be displayed by the pixel units B around the pixel units A changes, the gray level voltage provided on the data lines 14 of the pixel units B will certainly change. Now that the voltage of the parasitic capacitor 11 of the pixel units B cannot change immediately, the voltage of the common voltage of the pixel units B will fluctuate. But the common electrode 122 of each pixel unit is connected to each other, after which the voltage of the common electrode 122 of the pixel units A will also fluctuate. For example, Looking at the liquid crystal display of the constant bright type, when the pixel units B are dimmed by the bright pixel unit A from the bright state, the gray level voltage on the data lines 12 of the pixel units B increases because the voltage of the parasitic capacitor 11 of the pixel units B cannot change immediately , the voltage of the common electrode 122 of the pixel units B fluctuates, after which the voltage of the common electrode 122 of the bright pixel units A will also fluctuate. When the pixel units B around the light pixel unit A becomes light from the dark state, the voltage of the common electrode 122 of the pixel units A will also fluctuate.

Ebenso besteht bei einer Vielzahl von einzelnen Pixeleinheiten 100 des Flüssigkristallbildschirms das Problem, dass die Spannung der allgemeinen Elektrode 122 sich schwankend erhöht oder sinkt. Die gemeinsame Elektroden 122 jeder Pixeleinheit 100 miteinander verbunden, wonach führt das Problem, dass die gemeinsame Spannung der allgemeinen Elektroden 122 des Flüssigkristallbildschirms sich schwankend erhöht oder sinkt, was leicht zum Phänomen vom Koppelgeräusch führt, so dass die Anzeigequalität des Flüssigkristallbildschirms stark beeinträchtigt wird.Likewise, with a plurality of individual pixel units 100 of the liquid crystal screen, there is a problem that the voltage of the general electrode 122 fluctuates or decreases. The common electrodes 122 of each pixel unit 100 are connected to each other, which leads to the problem that the common voltage of the general electrodes 122 of the liquid crystal display itself fluctuatingly increases or decreases, which easily leads to the coupling noise phenomenon, so that the display quality of the liquid crystal display is greatly deteriorated.

Inhalt der ErfindungContent of the invention

Der Hauptzweck der vorliegenden Erfindung ist es, einen Flüssigkristallbildschirm bereitzustellen, um das Koppelgeräusch zu reduzieren und die Anzeigequalität des Flüssigkristallbildschirms zu verbessern. Der erfindungsgemässe Flüssigkristallbildschirm ist in Patentanspruch 1 definiert.The main purpose of the present invention is to provide a liquid crystal display to reduce the coupling noise and improve the display quality of the liquid crystal display. The liquid crystal screen according to the invention is defined in claim 1.

Es ist ein Flüssigkristallbildschirm bereitgestellt, aufweisend ein Flüssigkristallpaneel, das eine Vielzahl von matrixartig angeordneten Pixeleinheiten aufweist. Innerhalb jeder Pixeleinheit ist ein Flüssigkristall-Kondensator angeordnet, der Flüssigkristall-Kondensator weist eine Pixelelektrode und eine gemeinsame Elektrode auf, die einander gegenüberliegend angeordnet sind. Der Flüssigkristallbildschirm weist ferner einen Regler für Pixelspannung auf, der Regler für Pixelspannung weist eine Vielzahl von Kompensationskondensatoren und einen Verstärker mit Verstärkungsfaktor auf. Innerhalb jeder Pixeleinheit ist ein obiger Kompensationskondensator angeordnet, und der Kompensationskondensator weist eine obige Pixelelektrode und eine rückkoppelnde gemeinsame Elektrode auf, die einander gegenüberliegend angeordnet sind. Der Eingang des Verstärkers mit Verstärkungsfaktor ist mit der gemeinsamen Elektrode verbunden, der Ausgang ist mit der rückkoppelnden gemeinsamen Elektrode verbunden.A liquid crystal screen is provided, comprising a liquid crystal panel which has a plurality of pixel units arranged in a matrix. A liquid crystal capacitor is arranged within each pixel unit, the liquid crystal capacitor has a pixel electrode and a common electrode which are arranged opposite one another. The liquid crystal screen also has a regulator for pixel voltage, the regulator for pixel voltage has a multiplicity of compensation capacitors and an amplifier with a gain factor. An above compensation capacitor is arranged within each pixel unit, and the compensation capacitor has an above pixel electrode and a feedback common electrode which are arranged opposite to each other. The input of the amplifier with a gain factor is connected to the common electrode, the output is connected to the feedback common electrode.

Bevorzugt weist das Flüssigkristallpaneel eine Vielzahl von Abtastlinien und eine Vielzahl von Datenleitungen auf, und eine Vielzahl von Abtastlinien und eine Vielzahl von Datenleitungen überqueren sich in einer isolierten Weise, um die Pixeleinheiten zu definieren. Jede Pixeleinheit weist einen Dünnschichttransistor auf. Der Dünnschichttransistor weist eine Gate-Elektrode, eine Source-Elektrode und eine Drain-Elektrode auf. Die Gate-Elektrode ist mit einer Abtastlinie verbunden, die Source-Elektrode ist mit einer Datenleitung verbunden, und die Drain-Elektrode ist mit der Pixelelektrode verbunden.Preferably, the liquid crystal panel has a plurality of scan lines and a plurality of data lines, and a plurality of scan lines and a plurality of data lines cross in an isolated manner to define the pixel units. Each pixel unit has a thin film transistor. The thin film transistor has a gate electrode, a source electrode and a drain electrode. The gate electrode is connected to a scan line, the source electrode is connected to a data line, and the drain electrode is connected to the pixel electrode.

Bevorzugt weist jede Pixeleinheit ferner einen Speicherkondensator auf, und der Speicherkondensator weist eine obige Pixelelektrode und eine Speicherelektrode auf, die einander gegenüberliegend angeordnet sind. Die Speicherelektrode und die obige gemeinsame Elektrode empfangen gleiche gemeinsame Spannung.Each pixel unit preferably also has a storage capacitor, and the storage capacitor has an above pixel electrode and a storage electrode which are arranged opposite one another. The storage electrode and the above common electrode receive the same common voltage.

Bevorzugt weist der Flüssigkristallbildschirm ferner einen Generator der gemeinsamen Spannung auf, der Generator der gemeinsamen Spannung stellt der Speicherelektrode und der gemeinsamen Elektrode die gemeinsame Spannung zur Verfügung.The liquid crystal display screen preferably also has a generator of the common voltage, the generator of the common voltage makes the common voltage available to the storage electrode and the common electrode.

Bevorzugt weist der Flüssigkristallbildschirm ferner einen Scanner-Treiber auf, der Scanner-Treiber stellt den Abtastlinien das Scanner-Signal zur Verfügung.The liquid crystal screen preferably also has a scanner driver, the scanner driver makes the scanner signal available to the scanning lines.

Bevorzugt weist der Flüssigkristallbildschirm ferner einen Daten-Treiber auf, der Daten-Treiber stellt den Datenleitungen die Graustufenspannung zur Verfügung.The liquid crystal screen preferably also has a data driver; the data driver provides the gray level voltage to the data lines.

Bevorzug ist der Kapazitätswert des Kompensationskondensators zweimal so groß wie der Kapazitätswert des Flüssigkristall-Kondensators.The capacitance value of the compensation capacitor is preferably twice as large as the capacitance value of the liquid crystal capacitor.

Bevorzugt kann der Flüssigkristallbildschirm ein Flüssigkristallbildschirm sein, dessen Größe gleich oder kleiner als 32 Zoll ist.Preferably, the liquid crystal screen may be a liquid crystal screen the size of which is equal to or less than 32 inches.

Es ist ein Flüssigkristallbildschirm bereitgestellt, aufweisend ein Flüssigkristallpaneel, das eine Vielzahl von matrixartig angeordneten Pixeleinheiten aufweist. Innerhalb jeder Pixeleinheit ist ein Flüssigkristall-Kondensator angeordnet, der Flüssigkristall-Kondensator weist eine Pixelelektrode und eine gemeinsame Elektrode auf, die einander gegenüberliegend angeordnet sind. Der Flüssigkristallbildschirm weist ferner einen Regler für Pixelspannung auf, der Regler für Pixelspannung empfängt von der gemeinsamen Elektrode die rückkoppelnde gemeinsame Spannung und stellt gemäß der rückkoppelnden gemeinsamen Spannung die Spannung der Pixelelektrode ein.A liquid crystal screen is provided, comprising a liquid crystal panel which has a plurality of pixel units arranged in a matrix. A liquid crystal capacitor is arranged within each pixel unit, the liquid crystal capacitor has a pixel electrode and a common electrode which are arranged opposite one another. The liquid crystal display also has a regulator for pixel voltage, the regulator for pixel voltage receives the feedback common voltage from the common electrode and adjusts the voltage of the pixel electrode according to the feedback common voltage.

Bevorzugt weist jede Pixeleinheit ferner einen Speicherkondensator auf, der Speicherkondensator weist eine obige Pixelelektrode und eine Speicherelektrode auf, die einander gegenüberliegend angeordnet sind. Die Speicherelektrode und die obige gemeinsame Elektrode empfangen gleiche gemeinsame Spannung.Each pixel unit preferably also has a storage capacitor, the storage capacitor has an above pixel electrode and a storage electrode which are arranged opposite one another. The storage electrode and the above common electrode receive the same common voltage.

Bevorzugt weist der Regler für Pixelspannung eine Vielzahl von Kompensationskondensatoren und zwei Verstärker mit Verstärkungsfaktor auf. Innerhalb jeder Pixeleinheit ist ein obiger Kompensationskondensator angeordnet, und der Kompensationskondensator weist eine obige Pixelelektrode und eine rückkoppelnde gemeinsame Elektrode auf, die einander gegenüberliegend angeordnet sind. Der Flüssigkristallbildschirm besteht aus zwei vertikalsymmetrischen Teilen. Dabei ist der Eingang eines Verstärkers mit Verstärkungsfaktor mit der gemeinsamen Elektrode jeder Pixeleinheit des oberen Teils verbunden, und der Ausgang ist mit der rückkoppelnden gemeinsamen Elektrode des Kompensationskondensators in jeder Pixeleinheit des oberen Teils verbunden. Der Eingang des anderen Verstärkers mit Verstärkungsfaktor ist mit der gemeinsamen Elektrode jeder Pixeleinheit des unteren Teils verbunden, und der Ausgang ist mit der rückkoppelnden gemeinsamen Elektrode des Kompensationskondensators in jeder Pixeleinheit des unteren Teils verbunden.The controller for pixel voltage preferably has a large number of compensation capacitors and two amplifiers with an amplification factor. An above compensation capacitor is arranged within each pixel unit, and the compensation capacitor has an above pixel electrode and a feedback common electrode which are arranged opposite to each other. The liquid crystal screen consists of two vertically symmetrical parts. The input of an amplification factor amplifier is connected to the common electrode of each pixel unit of the upper part, and the output is connected to the feedback common electrode of the compensation capacitor in each pixel unit of the upper part. The input of the other gain amplifier is connected to the common electrode of each pixel unit of the lower part and the output is connected to the feedback common electrode of the compensation capacitor in each pixel unit of the lower part.

Bevorzugt weist das Flüssigkristallpaneel eine Vielzahl von Abtastlinien und eine Vielzahl von Datenleitungen auf, und eine Vielzahl von Abtastlinien und eine Vielzahl von Datenleitungen überqueren sich in einer isolierten Weise, um die Pixeleinheiten zu definieren. Jede Pixeleinheit weist einen Dünnschichttransistor auf. Der Dünnschichttransistor weist eine Gate-Elektrode, eine Source-Elektrode und eine Drain-Elektrode auf. Die Gate-Elektrode ist mit einer Abtastlinie verbunden, die Source-Elektrode ist mit einer Datenleitung verbunden, und die Drain-Elektrode ist mit der Pixelelektrode verbunden.Preferably, the liquid crystal panel has a plurality of scan lines and a plurality of data lines, and a plurality of scan lines and a plurality of data lines cross in an isolated manner to define the pixel units. Each pixel unit has a thin film transistor. The thin film transistor has a gate electrode, a source electrode and a drain electrode. The gate electrode is connected to a scan line, the source electrode is connected to a data line, and the drain electrode is connected to the pixel electrode.

Bevorzugt weist der Flüssigkristallbildschirm ferner einen Generator der gemeinsamen Spannung auf, der Generator der gemeinsamen Spannung stellt der Speicherelektrode und der gemeinsamen Elektrode die gemeinsame Spannung zur Verfügung.The liquid crystal display screen preferably also has a generator of the common voltage, the generator of the common voltage makes the common voltage available to the storage electrode and the common electrode.

Bevorzugt weist der Flüssigkristallbildschirm ferner einen Scanner-Treiber auf, der Scanner-Treiber stellt den Abtastlinien das Scanner-Signal zur Verfügung.The liquid crystal screen preferably also has a scanner driver, the scanner driver makes the scanner signal available to the scanning lines.

Bevorzugt weist der Flüssigkristallbildschirm ferner einen Daten-Treiber auf, der Daten-Treiber stellt den Datenleitungen die Graustufenspannung zur Verfügung.The liquid crystal screen preferably also has a data driver; the data driver provides the gray level voltage to the data lines.

Bevorzugt ist der Kapazitätswert des Kompensationskondensators zweimal so groß wie der Kapazitätswert des Flüssigkristall-Kondensators ist.The capacitance value of the compensation capacitor is preferably twice as large as the capacitance value of the liquid crystal capacitor.

Bevorzugt kann der Flüssigkristallbildschirm ein Flüssigkristallbildschirm sein, dessen Größe größer als 32 Zoll ist.Preferably, the liquid crystal screen can be a liquid crystal screen whose size is larger than 32 inches.

Bevorzugt ist die Größe des Flüssigkristallbildschirms 37 Zoll oder 40 Zoll.The size of the liquid crystal screen is preferably 37 inches or 40 inches.

Im Vergleich mit dem Stand der Technik weist der Flüssigkristallbildschirm der vorliegenden Erfindung ferner einen Regler für Pixelspannung auf. Der Regler für Pixelspannung kann die rückkoppelnde gemeinsame Spannung von der gemeinsamen Elektrode empfangen und gemäß der rückkoppelnden gemeinsamen Spannung die Spannung der Pixelelektrode einstellen, so dass die Spannung der Pixelelektrode sich synchron zu der gemeinsamen Spannung ändert, wonach wird die Schwankung der gemeinsamen Spannung Vcom ausgeglichen, das Phänomen des Koppelgeräusch wird effektiv verbessert und die Anzeigequalität des Flüssigkristallbildschirms wird verbessert.In comparison with the prior art, the liquid crystal display of the present invention further has a regulator for pixel voltage. The pixel voltage regulator can receive the feedback common voltage from the common electrode and adjust the voltage of the pixel electrode according to the feedback common voltage so that the voltage of the pixel electrode changes in synchronism with the common voltage, after which the fluctuation of the common voltage Vcom is compensated. the coupling noise phenomenon is effectively improved and the display quality of the liquid crystal display is improved.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

  • Figur 1 ist eine schematische Darstellung der Schaltung des Flüssigkristallanzeigers im Stand der Technik. Figure 1 is a schematic diagram of the circuit of the liquid crystal display in the prior art.
  • Figur 2 ist eine Ansicht für Pixel-Anordnung eines bestimmten Bereichs einer Ausführungsform des Flüssigkristallanzeigers in Figur 1. Figure 2 FIG. 10 is a view for pixel arrangement of a certain area of an embodiment of the liquid crystal display in FIG Figure 1 ,
  • Figur 3 ist eine schematische Darstellung der Schaltung der ersten Ausführungsform des Flüssigkristallanzeigers gemäß der vorliegenden Erfindung. Figure 3 is a schematic diagram of the circuit of the first embodiment of the liquid crystal display according to the present invention.
  • Figur 4 ist eine schematische Darstellung der Schaltung der zweiten Ausführungsform des Flüssigkristallanzeigers gemäß der vorliegenden Erfindung. Figure 4 is a schematic diagram of the circuit of the second embodiment of the liquid crystal display according to the present invention.

Im Zusammenhang mit den Ausführungsformen und den Figuren werden die Realisierung, die Funktionsmerkmale und die Vorteile der vorliegenden Erfindung näher erläutert.The realization, the functional features and the advantages of the present invention are explained in more detail in connection with the embodiments and the figures.

Ausführliche AusführungsformenDetailed embodiments

Es versteht sich, dass die hier beschriebenen Ausführungsformen keine Beschränkung der vorliegenden Erfindung ist, sondern die Erläuterung der vorliegenden Erfindung darstellen.It is to be understood that the embodiments described here are not a limitation of the present invention, but represent the explanation of the present invention.

Figur 3 ist die schematische Darstellung der Schaltung der ersten Ausführungsform des Flüssigkristallanzeigers gemäß der vorliegenden Erfindung. Der Flüssigkristallbildschirm weist ein Flüssigkristallpaneel 210, einen Generator der gemeinsamen Spannung 25, einen Regler für Pixelspannung, einen Scanner-Treiber 27 und einen Daten-Treiber 26 auf. Der Regler für Pixelspannung weist eine Vielzahl von Kompensationskondensatoren 28 und einen Verstärker mit Verstärkungsfaktor 29 auf. Der Flüssigkristallbildschirm kann ein Flüssigkristallbildschirm ein, dessen Größe gleich oder kleiner als 32 Zoll ist. Figure 3 Fig. 10 is a schematic diagram of the circuit of the first embodiment of the liquid crystal display according to the present invention. The liquid crystal screen has a liquid crystal panel 210, a common voltage generator 25, a regulator for pixel voltage, a scanner driver 27 and a data driver 26. The pixel voltage regulator has a plurality of compensation capacitors 28 and an amplifier with an amplification factor 29. The liquid crystal screen may be a liquid crystal screen whose size is equal to or less than 32 inches.

Das Flüssigkristallpaneel 210 weist eine Vielzahl von Abtastlinien 30 und eine Vielzahl von Datenleitungen 24 auf. Die Abtastlinien 30 und die Datenleitungen 24 überqueren sich in einer isolierten Weise, so dass eine Vielzahl von matrixartig angeordneten Pixeleinheiten 200 definiert wird. Innerhalb jeder Pixeleinheit 200 sind ein Dünnschichttransistor 20, ein Flüssigkristall-Kondensator 22, ein Speicherkondensator 23 und ein obiger Kompensationskondensator 28 angeordnet. Der Flüssigkristall-Kondensator 22 weist eine Pixelelektrode 221, eine gemeinsame Elektrode 222 und eine dazwischen liegende Flüssigkristallschicht (nicht dargestellt), die einander gegenüberliegend angeordnet sind.The liquid crystal panel 210 has a plurality of scan lines 30 and a plurality of data lines 24. The scan lines 30 and the data lines 24 cross in an isolated manner, so that a multiplicity of pixel units 200 arranged in a matrix-like manner are defined. A thin film transistor 20, a liquid crystal capacitor 22, a storage capacitor 23 and an above compensation capacitor 28 are arranged within each pixel unit 200. The liquid crystal capacitor 22 has a pixel electrode 221, a common electrode 222 and an intermediate liquid crystal layer (not shown), which are arranged opposite to each other.

Der Speicherkondensator 23 weist eine Pixelelektrode 221, eine Speicherelektrode 232 und isolierendes Material (nicht dargestellt) zwischen den Pixelelektroden und der Speicherelektrode auf, die einander gegenüberliegend angeordnet sind. Der Kompensationskondensator 28 weist eine Pixelelektrode 221, eine rückkoppelnde gemeinsame Elektrode 282 und isolierendes Material (nicht dargestellt) zwischen den Pixelelektroden und der rückkoppelnden gemeinsamen Elektrode auf, die einander gegenüberliegend angeordnet sind. Darüber hinaus sind parasitäre Kondensatoren 21 üblicherweise auf den Datenleitungen 24, der gemeinsamen Elektrode 222 und der Flüssigkristallschicht zwischen den Datenleitungen und der gemeinsamer Elektrode ausgebildet.The storage capacitor 23 has a pixel electrode 221, a storage electrode 232, and insulating material (not shown) between the pixel electrodes and the storage electrode, which are arranged opposite to each other. The compensation capacitor 28 has a pixel electrode 221, a feedback common electrode 282, and insulating material (not shown) between the pixel electrodes and the feedback common electrode, which are arranged opposite to each other. In addition, parasitic capacitors 21 are usually formed on the data lines 24, the common electrode 222 and the liquid crystal layer between the data lines and the common electrode.

Der Eingang eines Verstärkers mit Verstärkungsfaktor 29 ist über Rückkopplungsleitung 31 mit der gemeinsamen Elektrode 222 jeder Pixeleinheit 200 verbunden, und der Ausgang ist mit der rückkoppelnden gemeinsamen Elektrode 282 des Kompensationskondensators 28 innerhalb jeder Pixeleinheit 200 verbunden. Der Verstärker mit Verstärkungsfaktor 29 empfängt von der gemeinsamen Spannung 222 die rückkoppelnde gemeinsame Spannung VCOM' und vergrößert die Schubkraft des Stroms, so dass die Spannung der rückkoppelnden gemeinsamen Elektrode 282 des Kompensationskondensators 28 schnell aufgeladen oder auf die rückkoppelnde gemeinsame Spannung VCOM' entladen wird.The input of an amplifier with amplification factor 29 is connected via feedback line 31 to the common electrode 222 of each pixel unit 200, and the output is connected to the feedback common electrode 282 of the compensation capacitor 28 within each pixel unit 200. The gain 29 amplifier receives the feedback common voltage VCOM 'from the common voltage 222 and increases the thrust of the current so that the voltage of the feedback common electrode 282 of the compensation capacitor 28 is quickly charged or discharged to the feedback common voltage VCOM'.

Der Dünnschichttransistor 20 weist eine Gate-Elektrode, eine Source-Elektrode und eine Drain-Elektrode auf. Die Gate-Elektrode ist mit der Abtastlinien 30 verbunden, und die Source-Elektrode ist mit der Datenleitung 24 verbunden, und die Drain-Elektrode ist mit der Pixel-Elektrode 221 verbunden.The thin film transistor 20 has a gate electrode, a source electrode and a drain electrode. The gate electrode is connected to scan lines 30, the source electrode is connected to data line 24, and the drain electrode is connected to pixel electrode 221.

Der Scanner-Treiber 27 gibt nach der Reihenfolge mehrere Scanner-Signale auf jede Abtastlinie 30 aus. Wenn der Scanner-Treiber 27 das Scanner-Signal auf eine Zeile Abtastlinie 30 ausgibt, ist der mit der Abtastlinie 30 verbundene Dünnschichttransistor 20 geschaltet. Gleichzeitig führt der Daten-Treiber 26 mehreren Datenleitungen 24 mehrere Graustufenspannungen zu, so dass die Graustufenspannung durch die Source- und Drain-Elektroden des geschalteten Dünnschichttransistors 20 auf der Pixelelektrode 221 geladen wird.The scanner driver 27 outputs a plurality of scanner signals on each scanning line 30 in order. When the scanner driver 27 outputs the scanner signal on a line of scan line 30, the thin film transistor 20 connected to the scan line 30 is switched. At the same time, the data driver 26 supplies a plurality of data lines 24 to a plurality of gray level voltages, so that the gray level voltage is charged on the pixel electrode 221 by the source and drain electrodes of the switched thin-film transistor 20.

Der Generator der gemeinsamen Spannung 25 stellt der gemeinsamen Elektrode 222 und der Speicherelektrode 232 die gemeinsame Spannung Vcom zur Verfügung. Nachdem die Graustufenspannung über die Source- und Drain-Elektroden des geschalteten Dünnschichttransistors 20 auf die Pixelelektrode 221 geladen wurde, weil ein Spannungsunterschied zwischen der gemeinsamen Spannung und der Graustufenspannung am Flüssigkristall-Kondensator 22 besteht, weicht das dazwischen liegende Flüssigkristall ab, so dass die erforderliche Graustufe gemäß dem Abweichungswinkel des Flüssigkristalls angezeigt wird. Die Funktion des Speicherkondensators 23 ist, die Graustufenspannung an der Pixel-Elektrode 221 zu halten, so dass die Graustufenspannung an der Pixelelektrode 221 solange gehalten wird, bis die nächste Graustufenspannung ankommt.The common voltage generator 25 provides the common electrode 222 and the storage electrode 232 with the common voltage Vcom. After the gray level voltage is charged to the pixel electrode 221 via the source and drain electrodes of the switched thin film transistor 20 because there is a voltage difference between the common voltage and the gray level voltage at the liquid crystal capacitor 22, the liquid crystal in between deviates, so that the required one Grayscale is displayed according to the deviation angle of the liquid crystal. The function of the storage capacitor 23 is to hold the gray level voltage at the pixel electrode 221 so that the gray level voltage at the pixel electrode 221 is held until the next gray level voltage arrives.

In der Ausführungsform kann der Kapazitätswert des Kompensationskondensators 28 zweimal so groß wie der Kapazitätswert des Flüssigkristall-Kondensators 22 sein.In the embodiment, the capacitance value of the compensation capacitor 28 may be twice the capacitance value of the liquid crystal capacitor 22.

Im Vergleich mit dem Stand der Technik weist der Flüssigkristallbildschirm der vorliegenden Erfindung ferner einen Regler für Pixelspannung auf. Wenn die bereitgestellte Graustufenspannung an den Datenleitungen 24 sich ändert, schwankt die gemeinsame Spannung VCOM an der Speicherelektrode 232 und der gemeinsamen Elektrode 222 wegen des Vorhandenseins des parasitären Kondensators 21. Der Verstärker mit Verstärkungsfaktor 29 des Reglers für Pixelspannung empfängt von der gemeinsamen Elektrode 222 die rückkoppelnde gemeinsame Spannung VCOM' und koppelt die rückkoppelnde gemeinsame Spannung VCOM' schnell an die rückkoppelnde gemeinsame Elektrode 282 des Kompensationskondensators 28 rück. Da die Spannung des Kompensationskondensators 28 des Reglers für Pixelspannung sich nicht sofort ändern kann, ändert sich die Spannung der Pixelelektrode 221 der Pixeleinheit 200 auch, wenn die Spannung der rückkoppelnden gemeinsamen Elektrode 282 sich ändert, so dass die Spannung der Pixelelektrode 221 sich synchron zu der gemeinsamen Spannung VCOM ändert, wonach wird die Schwankung der gemeinsamen Spannung Vcom ausgeglichen, das Phänomen des Koppelgeräusch wird effektiv verbessert und die Anzeigequalität des Flüssigkristallbildschirms wird verbessert.In comparison with the prior art, the liquid crystal display of the present invention further has a regulator for pixel voltage. When the gray level voltage provided on the data lines 24 changes, the common voltage VCOM on the storage electrode 232 and the common electrode 222 fluctuates due to the presence of the parasitic capacitor 21. The amplifier with amplification factor 29 of the pixel voltage regulator receives the feedback from the common electrode 222 common voltage VCOM 'and quickly feeds the feedback common voltage VCOM' back to the feedback common electrode 282 of the compensation capacitor 28. Since the voltage of the compensation capacitor 28 of the pixel voltage regulator cannot change immediately, the voltage of the pixel electrode 221 of the pixel unit 200 also changes when the voltage of the feedback common electrode 282 changes, so that the voltage of the pixel electrode 221 changes synchronously with that common voltage VCOM changes, after which the fluctuation of the common voltage Vcom is compensated for, the coupling noise phenomenon is effectively improved, and the display quality of the liquid crystal panel is improved.

Figur 4 ist eine schematische Darstellung der Schaltung der zweiten Ausführungsform des Flüssigkristallanzeigers gemäß der vorliegenden Erfindung. Der Flüssigkristallbildschirm kann ein Flüssigkristallbildschirm sein, dessen Größe größer als 32 Zoll ist, wie z.B. 37 Zoll, 40 Zoll. Der Flüssigkristallbildschirm der zweiten Ausführungsform ist im Wesentlichen gleich wie der Flüssigkristallbildschirm der ersten Ausführungsform, der Unterschied liegt darin: der Regler für Pixelspannung des Flüssigkristallbildschirms der zweiten Ausführungsform weist zwei Verstärker mit Verstärkungsfaktor auf, der Flüssigkristallbildschirm besteht aus zwei vertikalsymmetrischen Teilen (nicht dargestellt), die Pixeleinheiten 300 des oberen Teils verwenden gemeinsam einen gemeinsamen Verstärker mit Verstärkungsfaktor 39, und die Pixeleinheiten 300 des unteren Teils verwenden gemeinsam den anderen gemeinsamen Verstärker mit Verstärkungsfaktor 39. Figure 4 is a schematic diagram of the circuit of the second embodiment of the liquid crystal display according to the present invention. The liquid crystal screen can be a Be a liquid crystal screen larger than 32 inches, such as 37 inches, 40 inches. The liquid crystal panel of the second embodiment is substantially the same as the liquid crystal panel of the first embodiment, the difference is that the pixel voltage regulator of the liquid crystal panel of the second embodiment has two gain amplifiers, the liquid crystal panel consists of two vertically symmetrical parts (not shown) that Pixel units 300 of the upper part share a common amplifier with gain 39, and pixel units 300 of the lower part share the other common amplifier with gain 39.

Der Speicherkondensator 38 weist eine Pixelelektrode 381, eine rückkoppelnde gemeinsame Elektrode 382 und isolierendes Material (nicht dargestellt) zwischen den Pixelelektroden und der rückkoppelnde gemeinsame Elektrode 382 auf, die einander gegenüberliegend angeordnet sind. Dabei ist der Eingang eines Verstärkers mit Verstärkungsfaktor 39 durch Rückkoppelungsleitung 41 mit der gemeinsamen Elektrode 322 jeder Pixeleinheit 300 des oberen Teils verbunden, und der Ausgang ist mit der rückkoppelnden gemeinsamen Elektrode 382 des Kompensationskondensators 38 in jeder Pixeleinheit 300 des oberen Teils verbunden. Der Eingang des anderen Verstärkers mit Verstärkungsfaktor 39 ist durch Rückkoppelungsleitung 41 mit der gemeinsamen Elektrode 322 jeder Pixeleinheit 300 des unteren Teils verbunden, und der Ausgang ist mit der rückkoppelnden gemeinsamen Elektrode 382 des Kompensationskondensators 38 in jeder Pixeleinheit 300 des unteren Teils verbunden.The storage capacitor 38 has a pixel electrode 381, a feedback common electrode 382, and insulating material (not shown) between the pixel electrodes and the feedback common electrode 382, which are arranged opposite to each other. The input of an amplification factor 39 amplifier is connected through feedback line 41 to the common electrode 322 of each pixel unit 300 of the upper part, and the output is connected to the feedback common electrode 382 of the compensation capacitor 38 in each pixel unit 300 of the upper part. The input of the other gain 39 amplifier is connected through feedback line 41 to the common electrode 322 of each lower part pixel unit 300, and the output is connected to the common electrode feedback 382 of the compensation capacitor 38 in each lower part pixel unit 300.

Der Flüssigkristallbildschirm der vorliegenden Erfindung ist nicht auf die erste Ausführungsform und die zweite Ausführungsform beschränkt. Die Anzahl vom Verstärker mit Verstärkungsfaktor beschränkt sich nicht auf eins oder zwei, sondern kann gemäß der Größe des Flüssigkristallbildschirms erhöht werden, und die Anordnung und die Position des Verstärkers mit Verstärkungsfaktor können auch nach Bedarf eingestellt werden.The liquid crystal panel of the present invention is not limited to the first embodiment and the second embodiment. The number of the gain amplifier is not limited to one or two, but can be increased in accordance with the size of the liquid crystal panel, and the arrangement and the position of the gain amplifier can also be adjusted as required.

Das Obige ist nur eine bevorzugte Ausführungsform der vorliegenden Erfindung und keine Beschränkung des Patentumfangs der vorliegenden Erfindung. Der Schutzumfang wird durch die Ansprüche definiert.The above is only a preferred embodiment of the present invention and does not limit the scope of the present invention. The scope of protection is defined by the claims.

Claims (6)

  1. A Liquid crystal display, containing a liquid crystal panel (210), wherein the liquid crystal panel (210) comprises a plurality of pixel units (200, 300) arranged as a matrix, wherein a liquid crystal capacitor (22) is arranged within each pixel unit (200, 300), and wherein the liquid crystal capacitor (22) includes a pixel electrode (221) and a common electrode (222, 322) arranged in opposite positions relative to each other, and wherein each pixel unit (200, 300) also comprises a capacitor accumulator (23), where the said capacitor accumulator (23) includes a pixel electrode (221) as aforesaid and an accumulator electrode (232) that are arranged in opposite directions relative to each other, wherein the accumulator electrode (232) and the aforementioned common electrode (222, 322) of each pixel unit are electrically connected to each other and are fed with the same common voltage, characterized in that the liquid crystal display also comprises a pixel voltage regulator, and wherein the pixel voltage regulator is adapted to receive a common feedback voltage from the common electrode (222, 322) and to adjust the voltage of the respective pixel electrode (221) according to the common feedback voltage, where the pixel voltage regulator includes a plurality of compensation capacitors (28) and an amplifier (29) with an amplification factor, and where each one of said compensation capacitors (28) is arranged within each pixel unit (200), and where the compensation capacitor (28) comprises one of the aforementioned pixel electrodes (221) and one common feedback electrode (282) arranged in opposite positions relative to each other, and where the input of the amplifier (29) with an amplification factor is connected to the common electrode (222), and where the output is connected to the respective common feedback electrode (282).
  2. A Liquid Crystal Display according to claim 1, characterized in that the liquid crystal panel (210) shows a plurality of scan lines (30) and a plurality of data lines (24), wherein the plurality of scan lines (30) and the plurality of data lines (24) intersect in isolation, to define the pixel units (200, 300), and where each pixel unit (200, 300) comprises a Thin Film Transistor (20), and where said Thin Film Transistor (20) comprises a gate electrode, a source electrode and a drain electrode, and wherein the gate electrode is connected to a scan line (30), and wherein the source electrode is connected to a data line (24), and where the drain electrode is connected to a pixel electrode (221, 381).
  3. A Liquid Crystal Display according to claim 2, characterized in that the liquid crystal display also comprises a common voltage generator (25), wherein said common voltage generator (25) supplies the same voltage to the accumulator capacitor (232) and the common electrode (222, 322).
  4. A Liquid Crystal Display according to claim 2, characterized in that the liquid crystal display also comprises a scanner driver (27), wherein the scanner driver (27) supplies the scanner signal to the scan lines (30).
  5. A Liquid Crystal Display according to claim 2, characterized in that the liquid crystal display also comprises a data driver (26), wherein said data driver (26) supplies the grey scale voltage to the data lines (24).
  6. A Liquid Crystal Display according to claim 1, characterized in that the capacity value of the compensation capacitor (28, 38) is twice the capacity value of the liquid crystal capacitor (22).
EP11865403.7A 2011-05-09 2011-05-19 Liquid crystal display Active EP2706397B1 (en)

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CN2011101186466A CN102183852B (en) 2011-05-09 2011-05-09 Liquid crystal display
PCT/CN2011/074349 WO2012151761A1 (en) 2011-05-09 2011-05-19 Liquid crystal display

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Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120079354A (en) * 2011-01-04 2012-07-12 삼성모바일디스플레이주식회사 Shutter control system and image apparatus comprising the system
US9135882B2 (en) 2012-12-14 2015-09-15 Shenzhen China Star Optoelectronics Technology Co., Ltd Data driver circuit having compensation module, LCD device and driving method
CN103065594B (en) * 2012-12-14 2017-04-12 深圳市华星光电技术有限公司 Data driving circuit, liquid crystal display device and driving method
CN103257498B (en) * 2013-05-07 2016-04-13 京东方科技集团股份有限公司 A kind of dot structure and driving method, display device
KR102305323B1 (en) * 2014-09-10 2021-09-28 엘지디스플레이 주식회사 Touch sensing device
CN104795036B (en) * 2015-04-28 2018-02-27 京东方科技集团股份有限公司 A kind of compensation circuit, drive circuit and its method of work, display device
JP6531313B2 (en) * 2015-05-01 2019-06-19 凸版印刷株式会社 Liquid crystal display
TWI549113B (en) * 2015-05-29 2016-09-11 鴻海精密工業股份有限公司 Display device
US9740349B2 (en) * 2015-09-01 2017-08-22 Himax Technologies Limited Touch driving apparatus, touch driving method and touch display system
KR102342357B1 (en) * 2015-09-30 2021-12-24 엘지디스플레이 주식회사 Display device and driving method of the same
CN105301858B (en) * 2015-11-06 2018-09-18 深圳市华星光电技术有限公司 The preparation method and array substrate of a kind of display panel, display panel
CN105575356A (en) * 2016-03-21 2016-05-11 京东方科技集团股份有限公司 Pixel electrode voltage processing circuit and display apparatus
CN110544460B (en) * 2018-05-28 2022-02-22 奇景光电股份有限公司 Liquid crystal display and dynamic compensation system of common electrode voltage thereof
CN108735174B (en) * 2018-05-28 2020-07-28 深圳市华星光电技术有限公司 Pixel driving circuit, pixel driving method and display device
CN109377967B (en) * 2018-12-25 2020-07-10 惠科股份有限公司 Display panel correction method and display device
CN109445148A (en) * 2019-01-11 2019-03-08 惠科股份有限公司 Adjusting method of pixel structure and pixel voltage value adjusting system
CN115083364B (en) * 2022-06-23 2023-06-30 惠科股份有限公司 Pixel circuit, array substrate and display panel

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995000874A1 (en) * 1993-06-18 1995-01-05 Hitachi, Ltd. Liquid crystal matrix display device and method of driving the same
KR100448936B1 (en) * 1997-09-25 2004-11-16 삼성전자주식회사 Circuit for driving liquid crystal display device to compensate gate off voltage and method for driving the same, especially supplying common voltage from a common electrode to a gate line
KR100806906B1 (en) * 2001-09-25 2008-02-22 삼성전자주식회사 Liquid crystal display and driving apparatus and method thereof
KR100900548B1 (en) * 2002-12-17 2009-06-02 삼성전자주식회사 Liquid crystal display for generating common voltages with different values
JP2006189473A (en) * 2004-12-28 2006-07-20 Koninkl Philips Electronics Nv Active matrix liquid crystal display device
JP4932823B2 (en) * 2006-03-06 2012-05-16 シャープ株式会社 Active matrix substrate, display device, and television receiver
TWI339378B (en) * 2007-05-11 2011-03-21 Chimei Innolux Corp Liquid crystal display device and method for driving the same
CN101320170B (en) * 2007-06-08 2010-09-29 群康科技(深圳)有限公司 LCD device
KR101490483B1 (en) * 2008-09-05 2015-02-05 삼성디스플레이 주식회사 Liquid Crystal Display
TWI406247B (en) * 2009-05-04 2013-08-21 Au Optronics Corp Common-voltage compensation circuit and compensation method for use in a liquid crystal display
CN102034443A (en) * 2009-09-30 2011-04-27 北京京东方光电科技有限公司 Method for improving accuracy of pixel electrode voltage and array substrate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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EP2706397A1 (en) 2014-03-12
CN102183852B (en) 2013-07-17
US20120287107A1 (en) 2012-11-15
CN102183852A (en) 2011-09-14
WO2012151761A1 (en) 2012-11-15
US8576149B2 (en) 2013-11-05

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