CN109637480A - The adjusting method and pixel voltage regulating system of dot structure - Google Patents
The adjusting method and pixel voltage regulating system of dot structure Download PDFInfo
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- CN109637480A CN109637480A CN201910028094.6A CN201910028094A CN109637480A CN 109637480 A CN109637480 A CN 109637480A CN 201910028094 A CN201910028094 A CN 201910028094A CN 109637480 A CN109637480 A CN 109637480A
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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
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- 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
Abstract
The present invention relates to a kind of adjusting method of dot structure and pixel voltage regulating system, the adjusting method of dot structure is comprising steps of obtain the first voltage of pixel public electrode when charging normal；The public electrode is adjusted by first voltage to second voltage after scanning signal closes preset time；Wherein, relationship between the first voltage and second voltage is calculated according to cut-in voltage, closing voltage, the capacitance of parasitic capacitance and the capacitance of storage capacitors in the dot structure, so that the incrementss of the storage capacitance compensate the leakage rate of parasitic capacitance, final to meet after scanning signal closes preset time, pixel voltage is unchanged.The present invention is adjusted first voltage to second voltage after scanning signal closes preset time by adjusting public electrode in the dot structure, to reduce after scanning signal closes preset time, the phenomenon that pixel voltage declines.
Description
Technical field
The present invention relates to dot structure fields, and the adjusting method and pixel voltage more particularly to a kind of dot structure are adjusted
System.
Background technique
(Thin Film Transistor Liquid Crystal Display, tft liquid crystal are aobvious by TFT-LCD
Show device) it is one of the principal item that current flat panel is shown, have become modern IT, display platform important in video product.
In Thin Film Transistor-LCD, the carrier for realizing liquid crystal electrooptical effect is pixel, in dot structure
In, after pixel voltage charging, when gate element is closed, the variation of gate voltage is through parasitic capacitance to the liquid in dot structure
Brilliant capacitor and the quantity of electric charge of storage capacitors carry out sub-distribution again, make after scanning signal is closed, pixel electrode voltage declines
The phenomenon that, which can make liquid crystal display panel generate flashing.
Summary of the invention
Based on this, it is necessary in view of the above-mentioned problems, providing a kind of adjusting method of dot structure, reduce the sudden strain of a muscle of liquid crystal display panel
Bright phenomenon.
A kind of adjusting method of dot structure, comprising steps of
Obtain the first voltage of pixel public electrode when charging normal；
The public electrode is adjusted by first voltage to second voltage after scanning signal closes preset time；
Wherein, the relationship between the first voltage and second voltage is according to the cut-in voltage in the dot structure, pass
The capacitance for closing voltage, the capacitance of parasitic capacitance and storage capacitors is calculated, so that the incrementss pair of the storage capacitance
The leakage rate of parasitic capacitance compensates, and final to meet after scanning signal closes preset time, pixel voltage is unchanged.
The second voltage is higher than the first voltage in one of the embodiments,.
The second voltage value is fixed value in one of the embodiments, and the storage capacitance is according to described solid
Definite value is adjusted.
The second voltage value is on-fixed value in one of the embodiments, and according to the actual capacitance of storage capacitance
Value by being calculated in real time.
Meet after scanning signal closes preset time in one of the embodiments, pixel voltage is unconverted described
Relationship between first voltage and second voltage are as follows:
Wherein, VcomFor the first voltage, V 'comFor the second voltage, CgsFor the capacitance of the parasitic capacitance,
CstFor the capacitance of the storage capacitors, VGHFor the cut-in voltage, VGLFor the closing voltage.
Preset time after the scanning signal is closed in one of the embodiments, is zero.
The adjusting method of above-mentioned dot structure, it is pre- in scanning signal closing by adjusting public electrode in the dot structure
If adjusting first voltage to second voltage after the time, to reduce after scanning signal closes preset time, pixel voltage occurs
The phenomenon that decline, flashes to reduce liquid crystal display panel.
Conceived based on foregoing invention, a kind of adjusting method of dot structure is provided, comprising steps of
Obtain the first voltage of pixel public electrode when charging normal；
The public electrode is adjusted by first voltage to second voltage after scanning signal closes preset time；
Wherein, the relationship between the first voltage and second voltage is according to the cut-in voltage in the dot structure, pass
The capacitance for closing voltage, the capacitance of parasitic capacitance and storage capacitors is calculated, so that the incrementss pair of the storage capacitance
The leakage rate of parasitic capacitance compensates, and final to meet after scanning signal closes preset time, pixel voltage is unchanged；
Wherein, the second voltage is higher than the first voltage；
The second voltage value is fixed value, and the storage capacitance has been adjusted according to the fixed value or described
Second voltage value is on-fixed value, and according to the actual capacitance value of storage capacitance by being calculated in real time；
Preset time after the scanning signal is closed is zero；
Relationship between the first voltage and second voltage are as follows:
Wherein, VcomFor the first voltage, V 'comFor the second voltage, CgsFor the capacitance of the parasitic capacitance,
CstFor the capacitance of the storage capacitors, VGHFor the cut-in voltage, VGLFor the closing voltage.
The adjusting method of above-mentioned dot structure, it is pre- in scanning signal closing by adjusting public electrode in the dot structure
If adjusting first voltage to second voltage after the time, to reduce after scanning signal closes preset time, pixel voltage occurs
The phenomenon that decline, flashes to reduce liquid crystal display panel.
Conceived based on foregoing invention, a kind of pixel voltage regulating system be provided, comprising:
First voltage obtains module, for obtaining the first voltage of pixel public electrode when charging normal；
Voltage input module, for providing voltage for the public electrode；
Voltage regulator module, for adjusting the input voltage in the voltage input module；
Control module for receiving scanning signal, and controls the voltage regulator module when scanning signal closes default
Between after the output voltage in the voltage input module is adjusted by first voltage to second voltage；
Wherein, the relationship between the first voltage and second voltage is according to cut-in voltage, the closing electricity in dot structure
The capacitance of pressure, the capacitance of parasitic capacitance and storage capacitors is calculated, so that the incrementss of the storage capacitance are to parasitism
The leakage rate of capacitor compensates, and final to meet after scanning signal closes preset time, pixel voltage is unchanged.
The second voltage value is fixed value in one of the embodiments, and the storage capacitance is according to described solid
Definite value is adjusted.
The second voltage value is on-fixed value in one of the embodiments, and according to the actual capacitance of storage capacitance
Value by being calculated in real time.
Above-mentioned pixel voltage regulating system, it is default in scanning signal closing by adjusting public electrode in the dot structure
First voltage is adjusted to second voltage after time, to reduce after scanning signal closes preset time, under pixel voltage occurs
The phenomenon that drop, flashes to reduce liquid crystal display panel.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the method flow diagram in one embodiment；
Fig. 2 is the voltage timing diagram in one embodiment；
Fig. 3 is the voltage timing diagram in another embodiment；
Fig. 4 is the circuit modular structure schematic diagram in one embodiment.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and
It is not used in restriction the application.
A kind of adjusting method of dot structure, as shown in Figure 1, comprising steps of
S101, the first voltage for obtaining pixel public electrode when charging normal；
S102, the public electrode is adjusted by first voltage to second voltage after scanning signal closes preset time.
Wherein, the relationship between the first voltage and second voltage is according to the cut-in voltage in the dot structure, pass
The capacitance for closing voltage, the capacitance of parasitic capacitance and storage capacitors is calculated, so that the incrementss pair of the storage capacitance
The leakage rate of parasitic capacitance compensates, and final to meet after scanning signal closes preset time, pixel voltage is unchanged.
Wherein, which can be common electrode storage capacitors dot structure.The structure can be opened not influencing pixel
Mouth region domain or in the case where only sacrificing compared with small pixel open area, can increase the design area of storage capacitors as far as possible, guarantee storage
The storage charge in capacitor is deposited to be enough to maintain pixel potential when gate element is closed.
Specifically, when the gate element of the dot structure is opened, cut-in voltage, pixel are inputted in the dot structure
It starts to charge；When the gate element of the dot structure is closed, voltage is closed in input in the dot structure, and pixel stopping is filled
Electricity.
The first voltage and second voltage meet after scanning signal closes preset time, and pixel voltage is unchanged.Its
In, in the dot structure, storage capacitors and liquid crystal capacitance are load capacity, for maintaining pixel electricity after pixel charging
Pressure, wherein pixel charges when dot structure inputs cut-in voltage, the pixel charging knot when dot structure inputs and closes voltage
Beam.In the dot structure, in addition to load capacity, other capacitors are parasitic capacitance, and parasitic capacitance is divided into two kinds: one is match
Parasitic capacitance between line and pixel electrode influences the stability of pixel voltage；One is the parasitism electricity between wiring and wiring
Hold, influences the integrality for transmitting signal.Parasitic capacitance in the present embodiment is for the former, the parasitism electricity between wiring and pixel electrode
Hold.After pixel charging, when voltage is closed in input, the Partial charge in pixel is moved in parasitic capacitance, at this point, being common electrical
Pole provides a voltage, thus increase the amount of charge in pixel, the charge number for making the amount of charge lost in pixel and obtaining
Measure equal, after realizing that pixel electrode and public electrode charge normal in dot structure, pixel voltage is unchanged.
The adjusting method of above-mentioned dot structure, it is pre- in scanning signal closing by adjusting public electrode in the dot structure
If adjusting first voltage to second voltage after the time, make the amount of charge lost in pixel with obtained amount of charge in theory
It is upper equal, to reduce after scanning signal closes preset time, the phenomenon that pixel voltage declines.
In one embodiment, second voltage value is fixed value, and storage capacitance is adjusted according to the fixed value.Its
In, according to the amount of charge lost in pixel this major premise equal with obtained amount of charge, in conjunction with various known parameters, meter
Calculation obtains the capacitance of storage capacitors in the dot structure.Specifically, it was known that parameter includes cut-in voltage, closes voltage, the picture
In plain structure in the capacitance of parasitic capacitance and the dot structure public electrode first voltage and second voltage.
In one embodiment, second voltage value is on-fixed value, and passes through reality according to the actual capacitance value of storage capacitance
When be calculated.Wherein, according to the amount of charge lost in pixel this major premise equal with obtained amount of charge, in conjunction with each
Kind known parameters, are calculated the second voltage of public electrode in the dot structure.Specifically, it was known that parameter includes opening electricity
Pressure, close voltage, the capacitance of parasitic capacitance in the dot structure, in the dot structure storage capacitors capacitance, and should
The first voltage of public electrode in dot structure.
In one embodiment, with continued reference to Fig. 1, the second voltage of public electrode is higher than the first electricity in the dot structure
Pressure, to increase the amount of charge in pixel at the end of pixel voltage charges in the dot structure, make the electricity lost in pixel
Lotus quantity is equal with obtained amount of charge.
In one embodiment, with continued reference to Fig. 1, the dot structure is after scanning signal closes preset time, pixel electricity
It presses in unchanged, the sum of variation voltage and the variation voltage of storage capacitors of parasitic capacitance are zero.
The quantity of charge is originated from voltage, when the sum of the variation voltage of parasitic capacitance and the variation voltage of storage capacitors are zero
When, the amount of charge lost in pixel is equal with obtained amount of charge, i.e., pixel voltage is unchanged.
According to cut-in voltage and the voltage difference between voltage is closed, in conjunction with the electricity of the capacitance of parasitic capacitance, storage capacitors
The variation voltage of parasitic capacitance is calculated in the capacitance of capacitance and liquid crystal capacitance.
Specifically, the capacitor of the voltage difference between cut-in voltage and closing voltage, the capacitance of parasitic capacitance, storage capacitors
Relational expression between the variation voltage of value, the capacitance of liquid crystal capacitance and parasitic capacitance are as follows:
Wherein, Δ V1 is the variation voltage of parasitic capacitance, VGHFor cut-in voltage, VGLTo close voltage, CgsFor parasitic capacitance
Capacitance, CstFor the capacitance of storage capacitors, CclFor the capacitance of liquid crystal capacitance.
According to the voltage difference between the first voltage and second voltage of public electrode in the dot structure, in conjunction with parasitic capacitance
Capacitance, the capacitance of the capacitance of storage capacitors and liquid crystal capacitance, the variation voltage of storage capacitors is calculated.
Specifically, the voltage difference in the dot structure between the first voltage and second voltage of public electrode, parasitic capacitance
Capacitance, the capacitance of storage capacitors, the capacitance of liquid crystal capacitance and storage capacitors variation voltage between relational expression
Are as follows:
Wherein, Δ V2 is the variation voltage of storage capacitors, VcomFor the first voltage of public electrode in the dot structure,
V′comFor the second voltage of public electrode in dot structure, CgsFor the capacitance of parasitic capacitance, CstFor the capacitor of storage capacitors
Value, CclFor the capacitance of liquid crystal capacitance.
When first voltage and second voltage meet after scanning signal closes preset time, pixel voltage is unchanged, then:
Δ V1+ Δ V2=0, (3)
Marriage relation formula (1), (2) and (3), can obtain:
Relational expression (4) is the quantitative relation formula in the dot structure between the first voltage of public electrode and each parameter.
The adjusting method of above-mentioned dot structure, it is pre- in scanning signal closing by adjusting public electrode in the dot structure
If adjusting first voltage to second voltage after the time, make the amount of charge lost in pixel with obtained amount of charge in theory
It is upper equal, to reduce after scanning signal closes preset time, the phenomenon that pixel voltage declines.
In one embodiment, as shown in Fig. 2, V ' in figurecomFor the second voltage of public electrode, VcomFor public electrode
First voltage, VGHFor cut-in voltage, VGLTo close voltage, VpiexlFor pixel voltage.
In the dot structure, the preset time after said scanning signals are closed is zero, i.e., when pixel charges, common electrical
The voltage of pole is first voltage；At the end of pixel charging, the voltage of public electrode is adjusted to second voltage by first voltage, i.e.,
The period that public electrode charges normal is identical as the period that gate element is opened and synchronous.
When gate element is opened, cut-in voltage is inputted in dot structure, pixel starts to charge, and public electrode starts normally
Charging, pixel electrode voltage persistently rises at this time, and the voltage of public electrode is first voltage Vcom；When gate element is closed, as
Element stops charging, and public electrode stopping charges normal, while providing a second voltage V ' for public electrodecom, pixel is electric at this time
The voltage of pole is Vpiexl, the voltage of public electrode is by first voltage VcomIt jumps as second voltage V 'com.When each in dot structure
When parameter meets relational expression (4) in above-described embodiment, after the closing of gate element, pixel voltage is still Vpiexl, theoretically
It eliminates after scanning signal closes, the phenomenon that pixel voltage declines.
In one embodiment, as shown in figure 3, V ' in figurecomFor the second voltage of public electrode, VcomFor public electrode
First voltage, VGHFor cut-in voltage, VGLTo close voltage, VpiexlFor pixel voltage, Δ V1 is the variation voltage of parasitic capacitance.
In the dot structure, the preset time after said scanning signals are closed is equal to one charging week of the pixel electrode
The time that phase, i.e. public electrode charge normal is twice of opening time of gate element, and public electrode charge normal with
Gate element, which is opened, to be synchronized, as shown in Figure 3.
When gate element is opened, cut-in voltage is inputted in dot structure, pixel starts to charge, and public electrode starts normally
Charging, pixel electrode voltage persistently rises at this time, and the voltage of public electrode is first voltage Vcom；When gate element is closed, as
Element stops charging, and public electrode continues to charge normal, and the voltage of pixel electrode is by V at this timepiexlJump to VpiexlΔ V1, it is public
The voltage of electrode is still first voltage Vcom；After scanning signal closes an opening time of the gate element, public electrode
Voltage is by first voltage V 'comIt is adjusted to second voltage V 'com, the voltage of pixel electrode is by V at this timepiexlΔ V1 is jumped to
Vpiexl.When each parameter in dot structure meets relational expression (4) in above-described embodiment, after the closing of gate element, pixel
Voltage is still Vpiexl, theoretically eliminate scanning signal and close pixel voltage the phenomenon that declining after preset time.
Conceived based on foregoing invention, provide a kind of pixel voltage regulating system, as shown in Figure 4, comprising:
First voltage obtains module 100, for obtaining the first voltage of pixel public electrode when charging normal；
Voltage input module 200, for providing voltage for the public electrode 500；
Voltage regulator module 300, for adjusting the input voltage in the voltage input module；
Control module 400, for receiving scanning signal, and it is default in scanning signal closing to control the voltage regulator module
The output voltage in the voltage input module is adjusted by first voltage to second voltage after time；
Wherein, the relationship between the first voltage and second voltage is according to cut-in voltage, the closing electricity in dot structure
The capacitance of pressure, the capacitance of parasitic capacitance and storage capacitors is calculated, so that the incrementss of the storage capacitance are to parasitism
The leakage rate of capacitor compensates, and final to meet after scanning signal closes preset time, pixel voltage is unchanged..
Specifically, first voltage obtains module 100 and connect respectively with voltage input module 200 and control module 400, voltage
Input module 200 is connect with voltage regulator module 300 and public electrode respectively, and voltage regulator module 300 and control module 400 connect
It connects.
The working principle of the pixel voltage regulating system is as follows:
Voltage input module 200 provides first voltage to public electrode 500；When scanning signal is opened, first voltage is obtained
Modulus block 100 obtains first voltage from voltage input module 200, and by the first voltage information conveyance to control module 400；
After scanning signal closes preset time, control module 400 controls voltage regulator module 300 will be in voltage input module 200
Output voltage adjusted by first voltage to second voltage；It is again turned on when scanning signal is again turned on, or in scanning signal
Before, control module 400 controls voltage regulator module 300 and adjusts the output voltage in voltage input module 200 by second voltage
To first voltage.
Wherein, the preset time after scanning signal is closed can be set as needed.
Above-mentioned pixel voltage regulating system, it is default in scanning signal closing by adjusting public electrode in the dot structure
First voltage is adjusted to second voltage after time, to reduce after scanning signal closes preset time, under pixel voltage occurs
The phenomenon that drop, flashes to reduce liquid crystal display panel.
In one embodiment, the second voltage value is fixed value, and the storage capacitance is according to the fixed value
It is adjusted.
The working principle of the pixel voltage regulating system is as follows:
Voltage input module 200 provides first voltage to public electrode 500；When scanning signal is opened, first voltage is obtained
Modulus block 100 obtains first voltage from voltage input module 200, and by the first voltage information conveyance to control module 400；
After scanning signal closes preset time, control module 400 controls voltage regulator module 300 will be in voltage input module 200
Output voltage is adjusted by first voltage to second voltage；When scanning signal is again turned on, or before scanning signal is again turned on,
Control module 400 controls voltage regulator module 300 and adjusts the output voltage in voltage input module 200 to the by second voltage
One voltage.
In one embodiment, second voltage value is on-fixed value, and passes through reality according to the actual capacitance value of storage capacitance
When be calculated.
The working principle of the pixel voltage regulating system is as follows:
Voltage input module 200 provides first voltage to public electrode 500；When scanning signal is opened, first voltage is obtained
Modulus block 100 obtains first voltage from voltage input module 200, and by the first voltage information conveyance to control module 400；
In control module 400, according to the first voltage, in conjunction in dot structure cut-in voltage, close the capacitor of voltage, parasitic capacitance
Second voltage is calculated in the capacitance of value and storage capacitors, and after scanning signal closes preset time, control module 400 is controlled
Voltage regulator module 300 is adjusted the output voltage in voltage input module 200 to second voltage by first voltage；Believe in scanning
When number being again turned on, or before scanning signal is again turned on, control module 400 controls voltage regulator module 300 for voltage input
Output voltage in module 200 is adjusted by second voltage to first voltage.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of adjusting method of dot structure, which is characterized in that comprising steps of
Obtain the first voltage of pixel public electrode when charging normal；
The public electrode is adjusted by first voltage to second voltage after scanning signal closes preset time；
Wherein, the relationship between the first voltage and second voltage is according to cut-in voltage, the closing electricity in the dot structure
The capacitance of pressure, the capacitance of parasitic capacitance and storage capacitors is calculated, so that the incrementss of the storage capacitance are to parasitism
The leakage rate of capacitor compensates, and final to meet after scanning signal closes preset time, pixel voltage is unchanged.
2. the adjusting method of dot structure according to claim 1, which is characterized in that the second voltage is higher than described first
Voltage.
3. the adjusting method of dot structure according to claim 1, which is characterized in that the second voltage value is fixed value,
And the storage capacitance is adjusted according to the fixed value.
4. the adjusting method of dot structure according to claim 1, which is characterized in that the second voltage value is on-fixed
Value, and according to the actual capacitance value of the storage capacitance by being calculated in real time.
5. the adjusting method of dot structure according to claim 1, which is characterized in that meet when scanning signal closes default
Between after, the relationship between the unconverted first voltage of pixel voltage and second voltage are as follows:
Wherein, VcomFor the first voltage, V 'comFor the second voltage, CgsFor the capacitance of the parasitic capacitance, CstFor institute
State the capacitance of storage capacitors, VGHFor the cut-in voltage, VGLFor the closing voltage.
6. the adjusting method of dot structure described in any one of -5 according to claim 1, which is characterized in that the scanning signal is closed
Preset time after closing is zero.
7. a kind of adjusting method of dot structure, which is characterized in that comprising steps of
Obtain the first voltage of pixel public electrode when charging normal；
The public electrode is adjusted by first voltage to second voltage after scanning signal closes preset time；
Wherein, the relationship between the first voltage and second voltage is according to cut-in voltage, the closing electricity in the dot structure
The capacitance of pressure, the capacitance of parasitic capacitance and storage capacitors is calculated, so that the incrementss of the storage capacitance are to parasitism
The leakage rate of capacitor compensates, and final to meet after scanning signal closes preset time, pixel voltage is unchanged；
Wherein, the second voltage is higher than the first voltage；
The second voltage value is fixed value, and the storage capacitance has been adjusted according to the fixed value or described second
Voltage value is on-fixed value, and according to the actual capacitance value of storage capacitance by being calculated in real time；
Preset time after the scanning signal is closed is zero；
Relationship between the first voltage and second voltage are as follows:
Wherein, VcomFor the first voltage, V 'comFor the second voltage, CgsFor the capacitance of the parasitic capacitance, CstFor institute
State the capacitance of storage capacitors, VGHFor the cut-in voltage, VGLFor the closing voltage.
8. a kind of pixel voltage regulating system characterized by comprising
First voltage obtains module, for obtaining the first voltage of pixel public electrode when charging normal；
Voltage input module, for providing voltage for the public electrode；
Voltage regulator module, for adjusting the input voltage in the voltage input module；
Control module for receiving scanning signal, and controls the voltage regulator module after scanning signal closes preset time
Output voltage in the voltage input module is adjusted by first voltage to second voltage；
Wherein, the relationship between the first voltage and second voltage according in dot structure cut-in voltage, close voltage, post
The capacitance of raw capacitor and the capacitance of storage capacitors are calculated, so that the incrementss of the storage capacitance are to parasitic capacitance
Leakage rate compensates, and final to meet after scanning signal closes preset time, pixel voltage is unchanged.
9. pixel voltage regulating system according to claim 8, which is characterized in that the second voltage value is fixed value, and
The storage capacitance is adjusted according to the fixed value.
10. pixel voltage regulating system according to claim 8, which is characterized in that the second voltage value is on-fixed value,
And according to the actual capacitance value of storage capacitance by being calculated in real time.
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| CN102610205A (en) * | 2012-03-29 | 2012-07-25 | 深圳市华星光电技术有限公司 | Feed-through voltage compensation circuit, liquid crystal display device and feed-through voltage compensation method |
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Application publication date: 20190416 |