CN101196627A - Regulation method for common electric voltage of LCD panel - Google Patents
Regulation method for common electric voltage of LCD panel Download PDFInfo
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- CN101196627A CN101196627A CNA2006101573684A CN200610157368A CN101196627A CN 101196627 A CN101196627 A CN 101196627A CN A2006101573684 A CNA2006101573684 A CN A2006101573684A CN 200610157368 A CN200610157368 A CN 200610157368A CN 101196627 A CN101196627 A CN 101196627A
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Abstract
The invention relates to a method for adjusting the common voltage of the LCD panel, which comprises the following steps: using a first color detector to detect the color of a pixel in the first frame, and using a second color detector to detect the color of another pixel in the second frame. With comparing the color detecting value of the two color detectors to adjust the common voltage, the invention reduces the difference of the two color detecting value of the two color detectors.
Description
Technical field
The present invention relates to a kind of method of adjustment of common electric voltage of LCD panel.
Background technology
Because advantages such as display panels has gently, approaches, power consumption is little are widely used in modernized information equipments such as TV, notebook computer, mobile phone, personal digital assistant.
Seeing also Fig. 1, is a kind of synoptic diagram of prior art display panels.This display panels 10 comprises liquid crystal layer (scheme do not show), scan driving circuit 11 and the data drive circuit 12 of second substrate (figure does not show), between these two substrates that one first substrate (figure do not show), is oppositely arranged with this first substrate.
This first substrate comprises that many sweep traces that are parallel to each other 13, many are parallel to each other and the data line 14, a plurality of pixel electrode 151 that intersect vertically with these sweep trace 13 insulation respectively and be positioned at a plurality of thin film transistor (TFT)s 15 of this sweep trace 13 and these data line 14 infalls.This scan drive circuit 11 is used for driving this sweep trace 13.This data drive circuit 12 is used for driving this data line 14.This sweep trace 13 is a pixel cell 16 with the Minimum Area that this data line 14 is enclosed.This second substrate comprises the public electrode 152 that a plurality of and pixel electrode 151 are relative.
The driving method of this display panels 10 is as follows:
When scanning voltage was provided to the grid of this thin film transistor (TFT) 15 via this sweep trace 13, this thin film transistor (TFT) 15 was opened.This moment, one driving voltage was provided to this pixel electrode 151 via the source electrode and the drain electrode of this thin film transistor (TFT) 15.Usually be provided a stable common electric voltage on this public electrode 152.Thereby, producing an electric field between this pixel electrode 151 and this public electrode 152, this electric field makes a plurality of pixel cells 16 show bright attitude or dark attitude.
So, in the manufacture process of this display panels 10, height, the width of a plurality of public electrodes 152 are not identical on this second substrate, the internal resistance that makes a plurality of public electrodes 152 is not identical, thereby the common electric voltage of a plurality of public electrodes 152 has higher or lower deviation, has the problem of film flicker when causing this display panels 10 to show.
The method that present industry overcomes the problems referred to above is to utilize human eye to observe the flicker level of this display panels 10, common electric voltage to this public electrode 152 is adjusted, when the film flicker degree of this display panels 10 was minimum, the common electric voltage of this public electrode 152 was an optimum value.Yet human eye symptoms such as dizziness, dim eyesight can occur after observing display panels 10 for a long time, causes human eye inaccurate to the flicker level observation of this display panels 10, thereby causes the common electric voltage of this public electrode 152 to adjust inaccurate.
Summary of the invention
For the inaccurate problem of the common electric voltage that solves the prior art display panels, be necessary to provide a kind of method of adjustment that can effectively adjust common electric voltage of LCD panel.
A kind of method of adjustment of common electric voltage of LCD panel, wherein, this display panels comprises scan driving circuit, one data drive circuit, many parallel scanning beams and data line that with this sweep trace insulation intersect parallel with many, this sweep trace and this data line define a plurality of red, green, blue sub-pixel unit, this is red, green, blue sub-pixel unit constitutes a pixel cell, the method of adjustment of this liquid crystal panel common electric voltage comprises the steps: that step a 1. these scan drive circuits produce a plurality of sweep signals continuously in first frame, and provide this sweep signal successively to each horizontal scanning line, simultaneously, this data drive circuit provides in the same way high voltage to two sub-pixel unit corresponding data line of a pixel cell in this frame, provide reverse high voltage to another sub-pixel unit corresponding data line of this pixel cell; Step a2. adopts one first color detector to detect the color of this pixel cell in first frame; This scan drive circuit of step a3. produces a plurality of sweep signals continuously in second frame, and provide this sweep signal successively to each horizontal scanning line, simultaneously, this data drive circuit sub-pixel unit corresponding data line to another pixel cell in this frame provides the high voltage opposite with first frame; Step a4. adopts one second color detector to detect the color of this pixel cell in second frame; Step a5. is the color detecting value of these two color detectors relatively, and this common electric voltage is adjusted, and reduces the difference of the color detecting value of these two color detectors.
Compared to prior art, the method of adjustment of the common electric voltage of this display panels of the present invention is to adopt this first color detector to detect the color of odd-numbered line pixel cell in first frame, and adopt this second color detector to detect the color of even number line pixel cell, by two color detecting values of these two color detectors relatively, common electric voltage to this public electrode is adjusted, when these two color distinction hour, the common electric voltage of this public electrode is an optimum value, has overcome in the prior art because of human eye the inaccurate common electric voltage that causes of display panels observation to be adjusted inaccurate problem.
Description of drawings
Fig. 1 is a kind of synoptic diagram of prior art display panels.
Fig. 2 is the synoptic diagram of the applied display panels of method of adjustment of common electric voltage of LCD panel of the present invention.
Fig. 3 is the some inversion driving synoptic diagram of display panels shown in Figure 2.
Fig. 4 is the drive signal waveform figure of display panels shown in Figure 2.
Embodiment
Seeing also Fig. 2, is the synoptic diagram of the applied display panels of method of adjustment of common electric voltage of LCD panel of the present invention.This display panels 20 comprises liquid crystal layer (scheme do not show), scan driving circuit 21 and the data drive circuit 22 of second substrate (figure does not show), between these two substrates that one first substrate (figure do not show), is oppositely arranged with this first substrate.
This first substrate comprises that many sweep traces that are parallel to each other 23, many are parallel to each other and the data line 24, a plurality of pixel electrode 251 that intersect vertically with these sweep trace 23 insulation respectively and be positioned at a plurality of thin film transistor (TFT)s 25 of this sweep trace 23 and these data line 24 infalls.This scan drive circuit 21 is used for driving this sweep trace 23.This data drive circuit 22 is used for driving this data line 24.This sweep trace 23 defines red sub-pixel unit (R) 260, green sub-pixels unit (G) 261, blue subpixels unit (B) 262 that multirow is R, G, B periodic arrangement with this data line 24.One red sub-pixel unit 260, a green sub-pixels unit 261 and a blue subpixels unit 262 constitute a pixel cell 26.
This second substrate comprises the public electrode 252 that a plurality of and pixel electrode 251 are relative.
The method of adjustment of these display panels 20 common electric voltages of one better embodiment can utilize the some inversion driving mode of this display panels 20 and FRC (Frame Rate Control, the control of frame ratio) mode to realize.See also Fig. 3 and Fig. 4, Fig. 3 is the some inversion driving synoptic diagram of this display panels 20, and Fig. 4 is the drive signal waveform figure of this display panels 20.Wherein, G
1-G
nThe sweep signal of representing these scan drive circuit 21 outputs, V
Oorb, V
Eerb, V
Eorb, V
OerbRepresent that respectively this data drive circuit 22 outputs to the redness of odd-numbered line odd column, even number line even column, even number line odd column and odd-numbered line even column pixel cell 26 and the voltage of blue subpixels unit 260,262, V respectively
Oog, V
Eeg, V
Eog, V
OegRepresent that respectively data drive circuit 22 outputs to the data-signal of the green sub-pixels unit 261 of odd-numbered line odd column, even number line even column, even number line odd column and odd-numbered line even column pixel cell, V respectively
ComRepresent the common electric voltage on this public electrode 252.The driving method of this display panels 20 is as follows:
1. first image durations of step a, this scan drive circuit 21 produces a plurality of sweep signals 291 continuously, and provides this sweep signal 291 to each horizontal scanning line 23 successively, and the thin film transistor (TFT) 25 that is connected on this horizontal scanning line 23 is opened.When this scan drive circuit produces sweep signal to the odd line interlace line, 22 pairs of odd column pixel cells of this data drive circuit, 26 corresponding data line 24 provide driving voltage, and the driving voltage that red and blue pixel unit 260,262 corresponding data line 24 are provided is positive high voltage V
h, the driving voltage that green pixel unit 261 corresponding data line 24 are provided is reverse negative high-voltage V
-hWhen this scan drive circuit produced sweep signal to the even number line sweep trace, this data drive circuit did not provide driving voltage.
Because the common electric voltage V of this public electrode 252
ComHigher or lower deviation is arranged usually, cause this redness identical with the voltage difference at liquid crystal molecule two ends in the blue pixel unit 260,262, and different with the voltage difference at liquid crystal molecule two ends in this green pixel unit 261.If the common electric voltage V of this public electrode 252
ComOn the low side, then the pixel cell 26 of odd-numbered line and odd column is green partially; If the common electric voltage V of this public electrode 252
ComHigher, then the pixel cell 26 of odd-numbered line and odd column is purple partially.Here suppose the common electric voltage V of this public electrode 252
ComOn the low side, so the pixel cell 26 of odd-numbered line and odd column is green partially.
In addition, because this data drive circuit 22 provides voltage only for pixel cell 26 corresponding data line 24 of odd-numbered line and odd column, so the display white all of the pixel cell 26 outside odd-numbered line and the odd column pixel cell 26.
Second image duration of step a2., this scan drive circuit 21 produces a plurality of sweep signals 291 continuously, and provides this sweep signal 291 to each horizontal scanning line 23 successively, and the thin film transistor (TFT) 25 that is connected on this horizontal scanning line 23 is opened.When this scan drive circuit produced sweep signal to the odd line interlace line, this data drive circuit did not provide driving voltage; When this scan drive circuit produces sweep signal to the even number line sweep trace, these data drive circuit 22 antithesis ordered series of numbers pixel cells 26 corresponding data line 24 provide driving voltage, and the driving voltage that red and blue pixel unit 260,262 corresponding data line 24 are provided is negative high-voltage V
-h, the driving voltage that green pixel unit 261 corresponding data line 24 are provided is reverse positive high voltage V
hTherefore, the pixel cell 26 of even number line and even column is purple partially, and the pixel cell 26 outside even number line and the even column pixel cell 26 is display white all.
The 3rd image duration of step a3., this scan drive circuit 21 produces a plurality of sweep signals 291 continuously, and provides this sweep signal 291 to each horizontal scanning line 23 successively, and the thin film transistor (TFT) 25 that is connected on this horizontal scanning line 23 is opened.When this scan drive circuit produced sweep signal to the odd line interlace line, this data drive circuit did not provide driving voltage; When this scan drive circuit produces sweep signal to the even number line sweep trace, 22 pairs of odd column pixel cells of this data drive circuit, 26 corresponding data line 24 provide driving voltage, and the driving voltage that red and blue pixel unit 260,262 corresponding data line 24 are provided is negative high-voltage V
-h, the driving voltage that green pixel unit 261 corresponding data line 24 are provided is reverse positive high voltage V
hIn like manner, the pixel cell 26 of even number line and odd column is purple partially, and the pixel cell 26 outside even number line and the odd column pixel cell 26 is display white all.
The 4th image duration of step a4., this scan drive circuit 21 produces a plurality of sweep signals 291 continuously, and provides this sweep signal 291 to each horizontal scanning line 23 successively, and the thin film transistor (TFT) 25 that is connected on this horizontal scanning line 23 is opened.When this scan drive circuit produces sweep signal to the odd line interlace line, these data drive circuit 22 antithesis ordered series of numbers pixel cells 26 corresponding data line 24 provide driving voltage, and the driving voltage that red and blue pixel unit 260,262 corresponding data line 24 are provided is positive high voltage V
h, the driving voltage that green pixel unit 261 corresponding data line 24 are provided is reverse negative high-voltage V
-hWhen this scan drive circuit produced sweep signal to the even number line sweep trace, this data drive circuit did not provide driving voltage.In like manner, the pixel cell 26 of odd-numbered line and even column is green partially, and the pixel cell 26 outside odd-numbered line and the even column pixel cell 26 is display white all.
After step a5. the 4th frame, this display panels 20 repeats above-mentioned steps.
The method of adjustment of these display panels 20 common electric voltages comprises the steps::
Step b1. adopts one first color detector to detect the color of odd-numbered line pixel cell 26 in first frame and the 4th frame, and adopts one second color detector to detect the color of even number line pixel cell 26 in second frame and the 3rd frame;
Step b2. is owing to the color of odd-numbered line pixel cell 26 in first frame and the 4th frame is green partially, and the color of even number line pixel cell 26 is purple partially in this second frame and the 3rd frame, therefore the color of this first color detector detecting is green partially, the color of this second color detector detecting is purple partially, the color detecting value of the color detecting value of this first color detector and the second color detector relatively is to the common electric voltage V of this public electrode 252
ComAdjust, when these two colors detecting value differences not hour, the common electric voltage V of this public electrode 252
ComBe optimum value.
Compared to prior art, this display panels 20 common electric voltage V
ComMethod of adjustment be the driving method that cooperates this display panels 20, adopt this first color detector that the color of odd-numbered line pixel cell 26 is detected, and adopt the color of this second color detector dual numbers row pixel cell 26 to detect, by two color detecting values of these two color detectors relatively, common electric voltage to this public electrode 252 is adjusted, when these two color distinction hour, the common electric voltage V of this public electrode 252
ComBe optimum value, overcome in the prior art and display panels has been observed the inaccurate common electric voltage V that causes because of human eye
ComAdjust inaccurate problem.
It is described that the method for adjustment of the common electric voltage of display panels of the present invention is not limited to above embodiment, as: this first color detector and this second color detector can further be detected the color of odd-numbered line pixel cell 26 behind the 4th frame picture and the color of even number line pixel cell 26 among the step b1.
This first color detector can only be detected the color of odd-numbered line pixel cell in first frame among the step b1, and this second color detector is only detected the color of even number line pixel cell in second frame.
Can adopt a plurality of first color detectors to detect the color of odd-numbered line pixel cell 26 in first frame and the 4th frame among the step b1, the color of each first color detector corresponding detecting one odd-numbered line pixel cell 26 in a frame, adopt a plurality of second color detectors to detect the color of even number line pixel cell 26 in second frame and the 3rd frame, the color of each second color detector corresponding detecting one even number line pixel cell 26 in a frame; The color detecting value of the color detecting value of this first color detector and this second color detector relatively respectively then is to the common electric voltage V of this public electrode 252
ComAdjust, reduce the difference of the color of all the first color detectors and second color detector detecting.
This data drive circuit also can be in first frame provides in the same way high voltage to the data line of any two sub-pixel unit in odd-numbered line and the odd column pixel cell among the step a 1 of the driving method of this display panels, and provides reverse high voltage to another sub-pixel unit; This data drive circuit of step a2 data line of dual numbers row and even column pixel cell in second frame provides the high voltage opposite with first frame.
The driving method of this display panels also can not adopt frame ratio control mode, and this data drive circuit only provides high voltage to a pixel cell among the step a 1 in first frame; This data drive circuit only provides the high voltage opposite with first frame to another pixel cell among the step a2 in second frame; These two color detectors are detected the color of these two pixel cells respectively among the step b1.
Claims (10)
1. the method for adjustment of a common electric voltage of LCD panel, wherein, the data line that this display panels comprises scan driving circuit, a data drive circuit, many parallel scanning beams are parallel with many and intersect with this sweep trace insulation, this sweep trace and this data line define a plurality of red, green, blue sub-pixel unit, this red, green, blue sub-pixel unit constitutes a pixel cell, and the method for adjustment of this liquid crystal panel common electric voltage comprises the steps:
This scan drive circuit of step a1. produces a plurality of sweep signals continuously in first frame, and provide this sweep signal successively to each horizontal scanning line, simultaneously, this data drive circuit provides in the same way high voltage to two sub-pixel unit corresponding data line of a pixel cell in this frame, provide reverse high voltage to another sub-pixel unit corresponding data line of this pixel cell;
Step a2. adopts one first color detector to detect the color of this pixel cell in first frame;
This scan drive circuit of step a3. produces a plurality of sweep signals continuously in second frame, and provide this sweep signal successively to each horizontal scanning line, simultaneously, this data drive circuit sub-pixel unit corresponding data line to another pixel cell in this frame provides the high voltage opposite with first frame;
Step a4. adopts one second color detector to detect the color of this pixel cell in second frame; With
Step a5. is the color detecting value of these two color detectors relatively, and this common electric voltage is adjusted, and reduces the difference of the color detecting value of these two color detectors.
2. the method for adjustment of this liquid crystal panel common electric voltage as claimed in claim 1 is characterized in that: this display panels is to adopt frame ratio control mode to drive.
3. the method for adjustment of this liquid crystal panel common electric voltage as claimed in claim 2 is characterized in that: the pixel cell of step a1 is a pixel cell in odd-numbered line and the odd column, and the pixel cell of step a3 is a pixel cell in even number line and the even column.
4. the method for adjustment of this liquid crystal panel common electric voltage as claimed in claim 3, it is characterized in that: among this step a1 this data drive circuit in this frame further the sub-pixel unit corresponding data line to all pixel cells of odd-numbered line and odd column high voltage is provided, adopt the color of this first color detector detecting odd-numbered line pixel cell among the step a2, among the step a3 this data drive circuit in this frame further the sub-pixel unit corresponding data line of all pixel cells of dual numbers row and even column the high voltage reverse with first frame is provided, adopt this second color detector to detect the color of even number line pixel cell in second frame among the step a4.
5. the method for adjustment of common electric voltage of LCD panel as claimed in claim 4, it is characterized in that: the data drive circuit of this step a1 is positive high voltage to the high voltage that red sub-pixel unit and blue subpixels unit corresponding data line provide, and the high voltage that green sub-pixels unit corresponding data line is provided is a negative high-voltage.
6. the method for adjustment of common electric voltage of LCD panel as claimed in claim 5, it is characterized in that: the data drive circuit of this step a3 is a negative high-voltage to the high voltage that red sub-pixel unit and blue subpixels unit corresponding data line provide, and the high voltage that green sub-pixels unit corresponding data line is provided is positive high voltage.
7. the method for adjustment of common electric voltage of LCD panel as claimed in claim 6, it is characterized in that: if this common electric voltage is on the low side, then the color of this first color detector detecting is green partially among the step a2, and the color of this second color detector detecting is purple partially among the step a4.
8. the method for adjustment of common electric voltage of LCD panel as claimed in claim 4, it is characterized in that: the method for adjustment of this common electric voltage of LCD panel further is included in and carries out following steps between step a4 and the a5::
This scan drive circuit of step b1. produces a plurality of sweep signals continuously in the 3rd frame, and provide this sweep signal successively to each horizontal scanning line, simultaneously, this data drive circuit in this frame only the sub-pixel unit corresponding data line of the pixel cell of dual numbers row and odd column the high voltage identical with second frame is provided;
Step b2. adopts this second color detector to continue the color of even number line pixel cell in detecting the 3rd frame;
This scan drive circuit of step b3. produces a plurality of sweep signals continuously in the 4th frame, and provide this sweep signal successively to each horizontal scanning line, simultaneously, this data drive circuit in this frame only the sub-pixel unit corresponding data line to the pixel cell of odd-numbered line and even column the high voltage identical with first frame is provided; With
Step b4. adopts this first color detector to continue the color of odd-numbered line pixel cell in detecting the 4th frame.
9. the method for adjustment of common electric voltage of LCD panel as claimed in claim 8 is characterized in that: the method for adjustment of this common electric voltage of LCD panel further is included in and repeats the step of this step a1 to this step b4 between step a4 and the a5.
10. the method for adjustment of this liquid crystal panel common electric voltage as claimed in claim 3, it is characterized in that: among this step a1 this data drive circuit in this frame further the sub-pixel unit corresponding data line to all pixel cells of odd-numbered line and odd column high voltage is provided, adopt a plurality of first color detectors to detect the color of odd-numbered line pixel cell in first frame among the step a2, the color of the corresponding detecting of each first color detector one odd-numbered line pixel cell, among the step a3 this data drive circuit in this frame further the sub-pixel unit corresponding data line of all pixel cells of dual numbers row and even column the high voltage opposite with first frame is provided, adopt a plurality of second color detectors to detect the color of even number line pixel cell in second frame among the step a4, the color of the corresponding detecting of each second color detector one even number line pixel cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101573684A CN100498444C (en) | 2006-12-08 | 2006-12-08 | Regulation method for common electric voltage of LCD panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101573684A CN100498444C (en) | 2006-12-08 | 2006-12-08 | Regulation method for common electric voltage of LCD panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101196627A true CN101196627A (en) | 2008-06-11 |
| CN100498444C CN100498444C (en) | 2009-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101573684A Expired - Fee Related CN100498444C (en) | 2006-12-08 | 2006-12-08 | Regulation method for common electric voltage of LCD panel |
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| Country | Link |
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| CN (1) | CN100498444C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047117A (en) * | 2015-09-09 | 2015-11-11 | 深圳市华星光电技术有限公司 | Method for adjusting common voltage of liquid crystal display panel |
| CN106257574A (en) * | 2015-06-19 | 2016-12-28 | 三星显示有限公司 | Determine the device of driving voltage |
-
2006
- 2006-12-08 CN CNB2006101573684A patent/CN100498444C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106257574A (en) * | 2015-06-19 | 2016-12-28 | 三星显示有限公司 | Determine the device of driving voltage |
| CN105047117A (en) * | 2015-09-09 | 2015-11-11 | 深圳市华星光电技术有限公司 | Method for adjusting common voltage of liquid crystal display panel |
| CN105047117B (en) * | 2015-09-09 | 2017-11-07 | 深圳市华星光电技术有限公司 | The method of adjustable liquid crystal display panel common electric voltage |
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| Publication number | Publication date |
|---|---|
| CN100498444C (en) | 2009-06-10 |
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