Pixel-driving circuit and display panelsTechnical field
The present invention relates to technical field of liquid crystal display, more particularly to a kind of pixel-driving circuit and display panels.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD) is with fuselage is thin, power saving, radiationless etc. numerous excellentPoint, has obtained widely applying, such as：LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screenCurtain or notebook computer screen etc., occupy an leading position in flat display field.
It is backlight liquid crystal display that liquid crystal display on existing market is most of, and which includes housing, in housingDisplay panels and the backlight module in housing.Generally display panels are by a colored filter substrate (ColorFilter, CF), a thin-film transistor array base-plate (Thin Film Transistor Array Substrate, TFTArray Substrate) and a liquid crystal layer being configured between two substrates (Liquid Crystal Layer) constituted, and pointRelative inner not in two substrates arranges pixel electrode, public electrode, controls liquid crystal molecule by applied voltage and changes direction, willThe light of backlight module reflects generation picture.
Vertical orientation (Vertical Alignment, VA) pattern is a kind of with high-contrast, without friction matching etc.The display panels Jing of advantage frequently with display pattern, but due to VA patterns using vertical rotation liquid crystal, liquid crystal moleculeThe diversity ratio of birefringence is larger, causes colour cast (color shift) problem under big visual angle than more serious.
The important requirement that colour cast is VA mode liquid crystal display panels is reduced, VA mode liquid crystal display panels are solved at presentThe main stream approach of colour cast is that several farmlands of primary area (main) in same sub-pixel are made using multidomain (multi domain) designIt is different with the liquid crystal molecule rotational angle on several farmlands of secondary area (sub), so as to improve colour cast, corresponding pixel driver electricityRoad (industry is referred to as 3T pixels), generally as shown in figure 1, including primary area TFT T1, secondary area TFT T2 and electric leakage TFT (SharingTFT) these three TFT of T3.The grid of primary area TFT T1, secondary area TFT T2 and electric leakage TFT T3 accesses jointly sub-pixel and is expert atCorresponding gated sweep signal G (n) (n is positive integer)；Primary area TFT T1 access sub-pixel jointly with the source electrode of secondary area TFT T2Corresponding data signal D (m) of column (m is positive integer)；The drain electrode of primary area TFT T1 connects and composes primary area liquid crystal capacitance Clc1One end and primary area storage capacitance Cst1 one end primary area pixel electrode (not shown)；Primary area liquid crystal capacitance Clc1's is anotherTerminate into the first common electric voltage Vcom1, the other end of primary area storage capacitance Cst1 accesses the second common electric voltage Vcom2；Secondary area TFTThe drain electrode of T2 connects and composes secondary area's pixel electrode of one end of one end and secondary area's storage capacitance Cst2 of time area liquid crystal capacitance Clc2(not shown)；The other end of secondary area's liquid crystal capacitance Clc2 accesses the first common electric voltage Vcom1, secondary area's storage capacitance Cst2 it is anotherTerminate into the second common electric voltage Vcom2；The drain electrode of the source electrode connection time area TFT T2 of electric leakage TFT T3, the drop-down electric capacity of drain electrode connectionOne end of C3；The other end of drop-down electric capacity C3 accesses the second common electric voltage Vcom2.It is when gated sweep signal G (n) is opened, mainArea TFT T1, secondary area TFT T2 and electric leakage TFT T3 these three TFT are all in opening, and primary area TFT T1 are to primary area pixelElectrode is charged, and experience certain hour will be identical with the current potential of data signal D (m), while secondary area TFT T2 also can be to secondaryArea's pixel electrode is charged, and the TFT T3 that leak electricity in addition exist and are opening, and its meeting will be the current potential of secondary area's pixel electrode sameDrop-down electric capacity C3 is connected, and drop-down electric capacity C3 is charged, so as to the current potential of secondary area's pixel electrode is reduced to primary area pixel electrodeBelow current potential, it is ensured that the primary area of sub-pixel is different from the current potential in secondary area, the lifting of side-looking effect is realized, reach big viewing angle compensation effectReally.
Or as shown in Fig. 2 different from Fig. 1 is that the drain electrode of electric leakage TFT T3 is directly accessed the second common electric voltageVcom2.When gated sweep signal G (n) is opened, primary area TFT T1, secondary area TFT T2 and electric leakage TFT T3 these three TFT are allIn opening, primary area TFT T1 are charged to primary area pixel electrode, and experience certain hour will be with data signal D (m)Current potential it is identical, while secondary area TFT T2 Ye Huiduici areas pixel electrode is charged, the TFT T3 that leak electricity in addition are present and to openState is opened, the current potential of secondary area's pixel electrode can be connected with the second common electric voltage Vcom2 by which, so as to by the electricity of secondary area's pixel electrodePosition is reduced to below the current potential of primary area pixel electrode, it is ensured that the primary area of sub-pixel is different from the current potential in secondary area, realizes side-looking effectLifting, reach big viewing angle compensation effect.
The design of above-mentioned 3T pixels and reduction colour cast (Low Color Shift, LCS) can reach big visual angle wellCompensation effect, is widely used in the design of VA display panels.However, as the display device such as mobile phone and notebook computer,Requirement to display function is more and more diversified, and information security and secret protection are constantly subjected to the attention of consumer, such as oneself makeDuring with computer or mobile phone, it is desirable to which it is good to face effect, while side-looking display effect is poor, so as to prevent display content from being seen by other peopleArrive, protect privacy；But when being carried out meeting or being shared with computer or mobile phone, it would be desirable that face and side-looking effect is all preferable,Thus screen display content can be clearly seen with more people；Existing 3T pixels and LCS designs do not clearly fulfil thisThe demand of sample.
The content of the invention
It is an object of the invention to provide a kind of pixel-driving circuit, enables to be displayed in big viewing angle compensation pattern and preventsPeep, meet the different display demand of user.
Another object of the present invention is to provide a kind of display panels, can easily in big viewing angle compensation pattern andMutually switched between peep-proof pattern, realized the multifunction of panel.
For achieving the above object, present invention firstly provides a kind of pixel-driving circuit, multiple including what is arranged in matrix formSub-pixel driver element, each sub-pixel driver element include primary area TFT, secondary area TFT, electric leakage TFT and switching TFT；
If n, m are the grid of positive integer, the grid of primary area TFT and secondary area TFT and access jointly sub-pixel driver element instituteIt is expert at corresponding gated sweep signal；The source electrode of the source electrode of primary area TFT and secondary area TFT accesses sub-pixel driver element institute jointlyArranging corresponding data signal；The drain electrode connection primary area pixel electrode of primary area TFT, the drain electrode connection time area pixel electricity of secondary area TFTPole；The drain electrode of the grid connection switching TFT of electric leakage TFT, the drain electrode of source electrode connection time area TFT；
The grid of switching TFT connects the first control end, and drain electrode the second control end of connection, source electrode access correlation signal；Work as instituteWhen stating the offer high potential signal control switching TFT unlatchings of the first control end, second control end does not provide signal, correlation signalAccess the grid of electric leakage TFT so that show access into big viewing angle compensation pattern；When first control end provides low-potential signal controlWhen system switching TFT is turned off, second control end provides low-potential signal, and the low-potential signal that second control end is provided connectsEnter the grid of TFT that leaks electricity, electric leakage TFT shut-offs so that show access into peep-proof pattern.
Optionally, the correlation signal is expert at corresponding gated sweep signal by sub-pixel driver element.
Optionally, the correlation signal is by the corresponding gated sweep signal of next line that sub-pixel driver element is expert at.
The primary area pixel electrode constitutes one end of primary area liquid crystal capacitance and one end of primary area storage capacitance, primary area liquid crystalThe other end of electric capacity accesses the first common electric voltage, and the other end of primary area storage capacitance accesses the second common electric voltage；Described area's picturePlain electrode constitutes one end of time one end of area's liquid crystal capacitance and secondary area's storage capacitance, and the other end of secondary area's liquid crystal capacitance accesses theOne common electric voltage, the other end of secondary area's storage capacitance access the second common electric voltage；The one of the drop-down electric capacity of drain electrode connection of electric leakage TFTThe second common electric voltage is accessed at end, the other end of drop-down electric capacity.
The primary area pixel electrode constitutes one end of primary area liquid crystal capacitance and one end of primary area storage capacitance, primary area liquid crystalThe other end of electric capacity accesses the first common electric voltage, and the other end of primary area storage capacitance accesses the second common electric voltage；Described area's picturePlain electrode constitutes one end of time one end of area's liquid crystal capacitance and secondary area's storage capacitance, and the other end of secondary area's liquid crystal capacitance accesses theOne common electric voltage, the other end of secondary area's storage capacitance access the second common electric voltage；It is public that the drain electrode of electric leakage TFT is directly accessed secondVoltage.
The present invention a kind of display panels are also provided, with pixel-driving circuit, the pixel-driving circuit include be inMatrix form arrangement multiple sub-pixel driver elements, each sub-pixel driver element include primary area TFT, secondary area TFT, electric leakage TFT,And switching TFT；
If n, m are the grid of positive integer, the grid of primary area TFT and secondary area TFT and access jointly sub-pixel driver element instituteIt is expert at corresponding gated sweep signal；The source electrode of the source electrode of primary area TFT and secondary area TFT accesses sub-pixel driver element institute jointlyArranging corresponding data signal；The drain electrode connection primary area pixel electrode of primary area TFT, the drain electrode connection time area pixel electricity of secondary area TFTPole；The drain electrode of the grid connection switching TFT of electric leakage TFT, the drain electrode of source electrode connection time area TFT；
The grid of switching TFT connects the first control end, and drain electrode the second control end of connection, source electrode access correlation signal；Work as instituteWhen stating the offer high potential signal control switching TFT unlatchings of the first control end, second control end does not provide signal, correlation signalAccess the grid of electric leakage TFT so that show access into big viewing angle compensation pattern；When first control end provides low-potential signal controlWhen system switching TFT is turned off, second control end provides low-potential signal, and the low-potential signal that second control end is provided connectsEnter the grid of TFT that leaks electricity, electric leakage TFT shut-offs so that show access into peep-proof pattern.
Optionally, the correlation signal is expert at corresponding gated sweep signal by sub-pixel driver element.
Optionally, the correlation signal is by the corresponding gated sweep signal of next line that sub-pixel driver element is expert at.
The primary area pixel electrode constitutes one end of primary area liquid crystal capacitance and one end of primary area storage capacitance, primary area liquid crystalThe other end of electric capacity accesses the first common electric voltage, and the other end of primary area storage capacitance accesses the second common electric voltage；Described area's picturePlain electrode constitutes one end of time one end of area's liquid crystal capacitance and secondary area's storage capacitance, and the other end of secondary area's liquid crystal capacitance accesses theOne common electric voltage, the other end of secondary area's storage capacitance access the second common electric voltage；The one of the drop-down electric capacity of drain electrode connection of electric leakage TFTThe second common electric voltage is accessed at end, the other end of drop-down electric capacity.
The primary area pixel electrode constitutes one end of primary area liquid crystal capacitance and one end of primary area storage capacitance, primary area liquid crystalThe other end of electric capacity accesses the first common electric voltage, and the other end of primary area storage capacitance accesses the second common electric voltage；Described area's picturePlain electrode constitutes one end of time one end of area's liquid crystal capacitance and secondary area's storage capacitance, and the other end of secondary area's liquid crystal capacitance accesses theOne common electric voltage, the other end of secondary area's storage capacitance access the second common electric voltage；It is public that the drain electrode of electric leakage TFT is directly accessed secondVoltage.
Beneficial effects of the present invention：A kind of pixel-driving circuit and display panels that the present invention is provided, in primary areaSwitching TFT is set up on the basis of TFT, secondary area TFT and electric leakage TFT, the grid of switching TFT is connected into the first control end, drain electrode connectsThe second control end is connect, source electrode accesses correlation signal；Open when first control end provides high potential signal control switching TFTWhen, second control end does not provide signal, and correlation signal accesses the grid of electric leakage TFT so that show access into big viewing angle compensationPattern；When first control end provides low-potential signal control switching TFT to be turned off, second control end provides electronegative potentialSignal, the low-potential signal that second control end is provided access the grid of electric leakage TFT, electric leakage TFT shut-offs so that show access intoPeep-proof pattern.Therefore only need to pass through to adjust by the signal provided with the second control end by the first control end easily at big visual angleMutually switched between compensation model and peep-proof pattern, realized the multifunction of panel, met the different display demand of user.
Description of the drawings
In order to be able to be further understood that the feature and technology contents of the present invention, refer to below in connection with the detailed of the present inventionIllustrate and accompanying drawing, but accompanying drawing only provides with reference to and illustrates to use, not for being any limitation as to the present invention.
In accompanying drawing,
Fig. 1 is a kind of circuit diagram of existing pixel-driving circuit that can reduce colour cast；
Fig. 2 is the circuit diagram of the pixel-driving circuit that existing another kind can reduce colour cast；
Fig. 3 is the circuit diagram of the first embodiment of the pixel-driving circuit of the present invention；
Fig. 4 is the circuit diagram of the second embodiment of the pixel-driving circuit of the present invention；
Fig. 5 is the circuit diagram of the 3rd embodiment of the pixel-driving circuit of the present invention.
Specific embodiment
Further to illustrate the technological means taken of the invention and its effect, below in conjunction with being preferable to carry out for the present inventionExample and its accompanying drawing are described in detail.
Present invention firstly provides a kind of pixel-driving circuit.Fig. 3 show the first reality of the pixel-driving circuit of the present inventionExample is applied, including the multiple sub-pixel driver elements arranged in matrix form, each sub-pixel driver element includes primary area TFT T1, secondaryArea TFT T2, electric leakage TFT T3 and switching TFT T4.
Specifically, if the grid that n, m are positive integer, the grid of primary area TFT T1 and secondary area TFT T2 accesses son jointlyBe expert at corresponding gated sweep signal G (n) of pixel drive unit；The source electrode of the source electrode of primary area TFT T1 and secondary area TFT T2It is common to access corresponding data signal D (m) of sub-pixel driver element column；The drain electrode of primary area TFT T1 connects and composes primary area liquidThe primary area pixel electrode (not shown) of one end of brilliant electric capacity Clc1 and one end of primary area storage capacitance Cst1；Primary area liquid crystal capacitanceThe other end of Clc1 accesses the first common electric voltage Vcom1, and the other end of primary area storage capacitance Cst1 accesses the second common electric voltageVcom2；The drain electrode of secondary area TFT T2 connects and composes one end and one end of secondary area's storage capacitance Cst2 of time area liquid crystal capacitance Clc2Secondary area's pixel electrode (not shown)；The other end of secondary area's liquid crystal capacitance Clc2 accesses the first common electric voltage Vcom1, secondary area's storageThe other end of electric capacity Cst2 accesses the second common electric voltage Vcom2；The drain electrode of the grid connection switching TFT T4 of electric leakage TFT T3, sourceThe drain electrode of pole connection time area TFT T2, one end of the drop-down electric capacity C3 of drain electrode connection, the other end access second of drop-down electric capacity C3 are publicCommon voltage Vcom2.The first common electric voltage Vcom1 is the voltage on the public electrode of color membrane substrates side, described secondCommon electric voltage Vcom2 is the voltage on the public electrode of array base palte side.
The grid of switching TFT T4 connects the first control end A, and drain electrode the second control end B of connection, source electrode access correlation signalK.In this first embodiment, the correlation signal K is expert at corresponding gated sweep signal G (n) by sub-pixel driver element.
When first control end A provides high potential signal to the grid of switching TFT T4, if switching TFT T4 are adoptedDuring non-crystalline silicon (A-Si) semiconductor layer, then first control end A provides the voltage signal of 27V to the grid of switching TFT T4,When control switching TFT T4 are opened, second control end B does not provide signal, and correlation signal K is that sub-pixel driver element is locatedCorresponding gated sweep signal G (n) of row accesses the grid of electric leakage TFT T3 by the switching TFT T4 for turning on, and circuit now is justWith the circuit equivalent that can reduce colour cast shown in Fig. 1：The be expert at corresponding gated sweep signal G of group pixel drive unitWhen () opens n, primary area TFT T1, secondary area TFT T2 and electric leakage TFT T3 these three TFT are all in opening, primary area TFTT1 is charged to primary area pixel electrode, and experience certain hour will be identical with the current potential of data signal D (m), while secondary area TFTT2 Ye Huiduici areas pixel electrode is charged, and the TFT T3 that leak electricity in addition are also opening, and which can be by secondary area's pixel electrodeCurrent potential is connected with drop-down electric capacity C3, drop-down electric capacity C3 is charged, so as to the current potential of secondary area's pixel electrode is reduced to primary area pixelBelow the current potential of electrode, it is ensured that the primary area of sub-pixel is different from the current potential in secondary area, realize the lifting of side-looking effect so that show intoEnter big viewing angle compensation pattern, reach big viewing angle compensation effect.
When first control end A provides low-potential signal, if switching TFT T4 adopt non-crystalline silicon (A-Si) quasiconductorDuring layer, then first control end A provides the voltage signal of -6V, control switching TFT T4 shut-offs to the grid of switching TFT T4When, be expert at corresponding gated sweep signal G (n) of sub-pixel driver element just can not access the grid of electric leakage TFT T3, describedSecond control end B provides low-potential signal, such as -6V, and the low-potential signal that second control end B is provided accesses electric leakage TFT T3'sGrid, electric leakage TFT T3 shut-offs, then the TFT T3 that leak electricity will not be to time area's discharge pixel electrodes, then group pixel drive unit instituteWhen corresponding gated sweep signal G (n) of being expert at is opened, primary area TFT T1 and secondary area TFT T2 are in opening, primary area TFTT1 is charged to primary area pixel electrode, while secondary area TFT T2 Ye Huiduici areas pixel electrode is charged, one timing of experienceBetween, primary area pixel electrode can be identical with the current potential of data signal D (m) with secondary area's pixel electrode, so that the primary area of sub-pixelIdentical with the current potential in secondary area, side-looking effect is poor so that show access into peep-proof pattern, reaches peep-proof effect.The angle model facedEnclosing can be (if needing positive angular field of view big, main to limit by changing the quantity on the farmland of primary area pixel electrode and time area's pixel electrodeArea's pixel electrode and secondary area's pixel electrode can adopt 4 farmlands, if it is little to face angular range, 2 farmlands or 1 farmland may be selected).
From described above：The first embodiment only need to be provided with the second control end B by adjusting the first control end ASignal can easily mutually be switched between big viewing angle compensation pattern and peep-proof pattern, realize the multi-functional of panelChange, meet the different display demand of user.
Fig. 4 show the second embodiment of the pixel-driving circuit of the present invention, and which is different only in that with first embodimentDrop-down electric capacity C3 is eliminated, the drain electrode of the TFT T3 that leak electricity is directly accessed the second common electric voltage Vcom2, and other structures are as good as, thisPlace no longer carries out repeated description.
When first control end A provides high potential signal to the grid of switching TFT T4, if switching TFT T4 are adoptedDuring non-crystalline silicon (A-Si) semiconductor layer, then first control end A provides the voltage signal of 27V to the grid of switching TFT T4,When control switching TFT T4 are opened, second control end B does not provide signal, and correlation signal K is that sub-pixel driver element is locatedCorresponding gated sweep signal G (n) of row accesses the grid of electric leakage TFT T3 by the switching TFT T4 for turning on, and circuit now is justWith the circuit equivalent that can reduce colour cast shown in Fig. 2：The be expert at corresponding gated sweep signal G of group pixel drive unitWhen () opens n, primary area TFT T1, secondary area TFT T2 and electric leakage TFT T3 these three TFT are all in opening, primary area TFTT1 is charged to primary area pixel electrode, and experience certain hour will be identical with the current potential of data signal D (m), while secondary area TFTT2 Ye Huiduici areas pixel electrode is charged, and the TFT T3 that leak electricity in addition are also opening, and which can be by secondary area's pixel electrodeCurrent potential is connected with the second common electric voltage Vcom2, so as to the current potential of secondary area's pixel electrode to be reduced to the current potential of primary area pixel electrodeBelow, it is ensured that the primary area of sub-pixel is different from the current potential in secondary area, realize the lifting of side-looking effect so that show access into big visual angle and mendPattern is repaid, big viewing angle compensation effect is reached.
When first control end A provides low-potential signal, if switching TFT T4 adopt non-crystalline silicon (A-Si) quasiconductorDuring layer, then first control end A provides the voltage signal of -6V, control switching TFT T4 shut-offs to the grid of switching TFT T4When, be expert at corresponding gated sweep signal G (n) of sub-pixel driver element just can not access the grid of electric leakage TFT T3, describedSecond control end B provides low-potential signal, such as -6V, and the low-potential signal that second control end B is provided accesses electric leakage TFT T3'sGrid, electric leakage TFT T3 shut-offs, then the TFT T3 that leak electricity will not be to time area's discharge pixel electrodes, then group pixel drive unit instituteWhen corresponding gated sweep signal G (n) of being expert at is opened, primary area TFT T1 and secondary area TFT T2 are in opening, primary area TFTT1 is charged to primary area pixel electrode, while secondary area TFT T2 Ye Huiduici areas pixel electrode is charged, one timing of experienceBetween, primary area pixel electrode can be identical with the current potential of data signal D (m) with secondary area's pixel electrode, so that the primary area of sub-pixelIdentical with the current potential in secondary area, side-looking effect is poor so that show access into peep-proof pattern, reaches peep-proof effect.The angle model facedEnclosing can be (if needing positive angular field of view big, main to limit by changing the quantity on the farmland of primary area pixel electrode and time area's pixel electrodeArea's pixel electrode and secondary area's pixel electrode can adopt 4 farmlands, if it is little to face angular range, 2 farmlands or 1 farmland may be selected).
The second embodiment need to only pass through to adjust convenience by the signal provided by the first control end A and the second control end BGround is mutually switched between big viewing angle compensation pattern and peep-proof pattern, realizes the multifunction of panel, meets user differentDisplay demand.
Fig. 5 show the 3rd embodiment of the pixel-driving circuit of the present invention, and which is different only in that with first embodiment,The correlation signal K is by the corresponding gated sweep signal G (n+1) of next line that sub-pixel driver element is expert at, other structuresIt is as good as, no longer carries out repeated description herein.
When first control end A provides high potential signal to the grid of switching TFT T4, if switching TFT T4 are adoptedDuring non-crystalline silicon (A-Si) semiconductor layer, then first control end A provides the voltage signal of 27V to the grid of switching TFT T4,When control switching TFT T4 are opened, second control end B does not provide signal, and correlation signal K is that sub-pixel driver element is locatedThe corresponding gated sweep signal G (n+1) of capable next line accesses the grid of electric leakage TFT T3 by the switching TFT T4 for turning on, thisWhen circuit it is just similar with the circuit that can reduce colour cast shown in Fig. 1：The be expert at corresponding grid of group pixel drive unitWhen scanning signal G (n) is opened, primary area TFT T1 and secondary area TFT T2 are in opening, and primary area TFT T1 are to primary area pixel electricityPole is charged, and experience certain hour will be identical with the current potential of data signal D (m), while secondary area TFT T2 Ye Huiduici areasPixel electrode is charged, and experience certain hour also can be identical with the current potential of data signal D (m)；Afterwards, correlation signal K is sonThe corresponding gated sweep signal G (n+1) of next line is expert at by pixel drive unit is opened, and the switching TFT T4 by turning onThe grid of electric leakage TFT T3 is accessed, electric leakage TFT T3 just enter opening, by the current potential of secondary area's pixel electrode with drop-down electric capacityC3 is connected, and drop-down electric capacity C3 is charged, so as to the current potential of secondary area's pixel electrode is reduced to below the current potential of primary area pixel electrode,Ensure that the primary area of sub-pixel is different from the current potential in secondary area, realize the lifting of side-looking effect so that show access into big viewing angle compensation mouldFormula, reaches big viewing angle compensation effect.
When first control end A provides low-potential signal, if switching TFT T4 adopt non-crystalline silicon (A-Si) quasiconductorDuring layer, then first control end A provides the voltage signal of -6V, control switching TFT T4 shut-offs to the grid of switching TFT T4When, the corresponding gated sweep signal G (n+1) of the next line is expert at by sub-pixel driver element just can not access electric leakage TFT T3'sGrid, second control end B provide low-potential signal, such as -6V, and the low-potential signal that second control end B is provided accesses leakageThe grid of electric TFT T3, electric leakage TFT T3 shut-offs, then the TFT T3 that leak electricity will not be to time area's discharge pixel electrodes, then work as sub-pixelWhen be expert at corresponding gated sweep signal G (n) of driver element is opened, primary area TFT T1 and secondary area TFT T2 are in unlatching shapeState, primary area TFT T1 are charged to primary area pixel electrode, while secondary area TFT T2 Ye Huiduici areas pixel electrode is charged,Experience certain hour, primary area pixel electrode can be identical with the current potential of data signal D (m) with secondary area's pixel electrode, so that subThe primary area of pixel is identical with the current potential in secondary area, and side-looking effect is poor so that show access into peep-proof pattern, reaches peep-proof effect.JustDepending on angular range can by change primary area pixel electrode and time area pixel electrode farmland quantity limiting (if needing positive visual angleScope is big, and primary area pixel electrode and secondary area's pixel electrode can adopt 4 farmlands, if it is little to face angular range, may be selected 2 farmlands or1 farmland).
The 3rd embodiment need to only pass through to adjust convenience by the signal provided by the first control end A and the second control end BGround is mutually switched between big viewing angle compensation pattern and peep-proof pattern, realizes the multifunction of panel, meets user differentDisplay demand.
Based on same inventive concept, the present invention also provides a kind of display panels, with above-mentioned pixel-driving circuit, energyIt is enough easily mutually to be switched between big viewing angle compensation pattern and peep-proof pattern, the multifunction of panel is realized, is met and is usedThe different display demand in family.
In sum, pixel-driving circuit of the invention and display panels, TFT, secondary area TFT and electric leakage in primary areaSwitching TFT is set up on the basis of TFT, the grid of switching TFT is connected into the first control end, drain electrode the second control end of connection, source electrodeAccess correlation signal；When first control end provides high potential signal control switching TFT opens, second control end is notSignal is provided, correlation signal accesses the grid of electric leakage TFT so that show access into big viewing angle compensation pattern；When the described first controlWhen end provides low-potential signal control switching TFT shut-offs, second control end provides low-potential signal, second control endThe low-potential signal of offer accesses the grid of electric leakage TFT, electric leakage TFT shut-offs so that show access into peep-proof pattern.Therefore need to only lead toOverregulate by the signal provided by the first control end and the second control end easily in big viewing angle compensation pattern and peep-proof patternBetween mutually switched, realize the multifunction of panel, meet the different display demand of user.
The above, for the person of ordinary skill of the art, can be with technology according to the present invention scheme and technologyOther various corresponding changes and deformation are made in design, and all these changes and deformation should all belong to appended right of the inventionThe protection domain of requirement.