CN106597714A - Pixel driving circuit and liquid crystal display panel - Google Patents
Pixel driving circuit and liquid crystal display panel Download PDFInfo
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- CN106597714A CN106597714A CN201710063457.0A CN201710063457A CN106597714A CN 106597714 A CN106597714 A CN 106597714A CN 201710063457 A CN201710063457 A CN 201710063457A CN 106597714 A CN106597714 A CN 106597714A
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- Prior art keywords
- tft
- area
- pixel
- primary area
- signal
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136213—Storage capacitors associated with the pixel electrode
-
- 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
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
Abstract
The invention provides a pixel driving circuit and a liquid crystal display panel. In the pixel driving circuit, a switch TFT (Thin Film Transistor) (T4) is additionally arranged on the basis of a primary area TFT (T1), a secondary area TFT (T2) and a leakage TFT (T3); a grid electrode of the switch TFT (T4) is connected with a first control end (A); a drain electrode of the switch TFT (T4) is connected with a second control end (B); and a source electrode of the switch TFT (T4) is connected with a linking signal (K). A large visual angle mode and an anti-peeping mode can be conveniently switched by a user by only regulating the signals supplied by the first control end (A) and the second control end (B), the multifunction of the panel can be realized and different display requirements of the user can be met.
Description
Technical 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 excellent
Point, has obtained widely applying, such as：LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen
Curtain 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 housing
Display panels and the backlight module in housing.Generally display panels are by a colored filter substrate (Color
Filter, CF), a thin-film transistor array base-plate (Thin Film Transistor Array Substrate, TFT
Array Substrate) and a liquid crystal layer being configured between two substrates (Liquid Crystal Layer) constituted, and point
Relative inner not in two substrates arranges pixel electrode, public electrode, controls liquid crystal molecule by applied voltage and changes direction, will
The 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 molecule
The 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 present
The main stream approach of colour cast is that several farmlands of primary area (main) in same sub-pixel are made using multidomain (multi domain) design
It 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 electricity
Road (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 (Sharing
TFT) 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 at
Corresponding 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 T2
Corresponding 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 Clc1
One end and primary area storage capacitance Cst1 one end primary area pixel electrode (not shown)；Primary area liquid crystal capacitance Clc1's is another
Terminate 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 TFT
The 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 another
Terminate 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 connection
One 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, main
Area 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 pixel
Electrode 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 secondary
Area'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 same
Drop-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 electrode
Below 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 effect
Really.
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 voltage
Vcom2.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 all
In 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 open
State 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 electrode
Position 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 effect
Lifting, 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 well
Compensation 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 make
During 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 people
Arrive, 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 this
The 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 prevents
Peep, 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 and
Mutually 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 form
Sub-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 institute
It 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 jointly
Arranging 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 TFT
Pole；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 institute
When stating the offer high potential signal control switching TFT unlatchings of the first control end, second control end does not provide signal, correlation signal
Access the grid of electric leakage TFT so that show access into big viewing angle compensation pattern；When first control end provides low-potential signal control
When system switching TFT is turned off, second control end provides low-potential signal, and the low-potential signal that second control end is provided connects
Enter 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 crystal
The 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 picture
Plain 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 the
One 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 TFT
The 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 crystal
The 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 picture
Plain 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 the
One 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 second
Voltage.
The present invention a kind of display panels are also provided, with pixel-driving circuit, the pixel-driving circuit include be in
Matrix 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 institute
It 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 jointly
Arranging 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 TFT
Pole；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 institute
When stating the offer high potential signal control switching TFT unlatchings of the first control end, second control end does not provide signal, correlation signal
Access the grid of electric leakage TFT so that show access into big viewing angle compensation pattern；When first control end provides low-potential signal control
When system switching TFT is turned off, second control end provides low-potential signal, and the low-potential signal that second control end is provided connects
Enter 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 crystal
The 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 picture
Plain 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 the
One 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 TFT
The 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 crystal
The 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 picture
Plain 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 the
One 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 second
Voltage.
Beneficial effects of the present invention：A kind of pixel-driving circuit and display panels that the present invention is provided, in primary area
Switching 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 connects
The second control end is connect, source electrode accesses correlation signal；Open when first control end provides high potential signal control switching TFT
When, 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 compensation
Pattern；When first control end provides low-potential signal control switching TFT to be turned off, second control end provides electronegative potential
Signal, 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 into
Peep-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 angle
Mutually 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 invention
Illustrate 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 invention
Example 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 invention
Example is applied, including the multiple sub-pixel driver elements arranged in matrix form, each sub-pixel driver element includes primary area TFT T1, secondary
Area 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 jointly
Be 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 T2
It 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 liquid
The 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 capacitance
The 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 voltage
Vcom2；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 Clc2
Secondary 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 storage
The 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, source
The 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 public
Common voltage Vcom2.The first common electric voltage Vcom1 is the voltage on the public electrode of color membrane substrates side, described second
Common 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 signal
K.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 adopted
During 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 located
Corresponding 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 just
With 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 unit
When () opens n, primary area TFT T1, secondary area TFT T2 and electric leakage TFT T3 these three TFT are all in opening, primary area TFT
T1 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 TFT
T2 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 electrode
Current 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 pixel
Below 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 into
Enter 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) quasiconductor
During layer, then first control end A provides the voltage signal of -6V, control switching TFT T4 shut-offs to the grid of switching TFT T4
When, 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, described
Second 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's
Grid, 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 institute
When 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 TFT
T1 is charged to primary area pixel electrode, while secondary area TFT T2 Ye Huiduici areas pixel electrode is charged, one timing of experience
Between, 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-pixel
Identical 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 faced
Enclosing 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 electrode
Area'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 A
Signal can easily mutually be switched between big viewing angle compensation pattern and peep-proof pattern, realize the multi-functional of panel
Change, 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 embodiment
Drop-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, this
Place 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 adopted
During 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 located
Corresponding 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 just
With 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 unit
When () opens n, primary area TFT T1, secondary area TFT T2 and electric leakage TFT T3 these three TFT are all in opening, primary area TFT
T1 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 TFT
T2 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 electrode
Current 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 electrode
Below, 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 mend
Pattern 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) quasiconductor
During layer, then first control end A provides the voltage signal of -6V, control switching TFT T4 shut-offs to the grid of switching TFT T4
When, 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, described
Second 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's
Grid, 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 institute
When 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 TFT
T1 is charged to primary area pixel electrode, while secondary area TFT T2 Ye Huiduici areas pixel electrode is charged, one timing of experience
Between, 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-pixel
Identical 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 faced
Enclosing 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 electrode
Area'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 B
Ground is mutually switched between big viewing angle compensation pattern and peep-proof pattern, realizes the multifunction of panel, meets user different
Display 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 structures
It 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 adopted
During 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 located
The 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, this
When 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 unit
When 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 electricity
Pole 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 areas
Pixel 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 son
The 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 on
The 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 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 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 mould
Formula, 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) quasiconductor
During layer, then first control end A provides the voltage signal of -6V, control switching TFT T4 shut-offs to the grid of switching TFT T4
When, 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's
Grid, second control end B provide low-potential signal, such as -6V, and the low-potential signal that second control end B is provided accesses leakage
The 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-pixel
When 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 shape
State, 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 sub
The 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.Just
Depending on angular range can by change primary area pixel electrode and time area pixel electrode farmland quantity limiting (if needing positive visual angle
Scope 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 or
1 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 B
Ground is mutually switched between big viewing angle compensation pattern and peep-proof pattern, realizes the multifunction of panel, meets user different
Display demand.
Based on same inventive concept, the present invention also provides a kind of display panels, with above-mentioned pixel-driving circuit, energy
It 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 used
The 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 area
Switching 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 electrode
Access correlation signal；When first control end provides high potential signal control switching TFT opens, second control end is not
Signal 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 control
When end provides low-potential signal control switching TFT shut-offs, second control end provides low-potential signal, second control end
The 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 to
Overregulate by the signal provided by the first control end and the second control end easily in big viewing angle compensation pattern and peep-proof pattern
Between 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 technology
Other various corresponding changes and deformation are made in design, and all these changes and deformation should all belong to appended right of the invention
The protection domain of requirement.
Claims (10)
1. a kind of pixel-driving circuit, it is characterised in that include the multiple sub-pixel driver elements in matrix form arrangement, Mei Yizi
Pixel drive unit include primary area TFT (T1), secondary area TFT (T2), electric leakage TFT (T3), and switching TFT (T4)；
If n, m are the grid of positive integer, the grid of primary area TFT (T1) and secondary area TFT (T2) and access jointly sub-pixel driving list
The be expert at corresponding gated sweep signal (G (n)) of unit；The source electrode of the source electrode of primary area TFT (T1) and secondary area TFT (T2) is connect jointly
Enter the corresponding data signal (D (m)) of sub-pixel driver element column；The drain electrode connection primary area pixel electrode of primary area TFT (T1),
The drain electrode connection time area pixel electrode of secondary area TFT (T2)；The drain electrode of grid connection switching TFT (T4) of electric leakage TFT (T3), source electrode
The drain electrode of connection time area TFT (T2)；
The grid of switching TFT (T4) connects the first control end (A), and drain electrode the second control end of connection (B), source electrode access correlation signal
(K)；When first control end (A) provides high potential signal control switching TFT (T4) opens, second control end (B)
Signal is not provided, correlation signal (K) accesses the grid of electric leakage TFT (T3) so that show access into big viewing angle compensation pattern；When described
When first control end (A) provides low-potential signal control switching TFT (T4) shut-off, second control end (B) provides electronegative potential
Signal, the low-potential signal that second control end (B) provides access the grid of electric leakage TFT (T3), and electric leakage TFT (T3) is turned off,
So that showing access into peep-proof pattern.
2. pixel-driving circuit as claimed in claim 1, it is characterised in that it is single that the correlation signal (K) is that sub-pixel drives
The be expert at corresponding gated sweep signal (G (n)) of unit.
3. pixel-driving circuit as claimed in claim 1, it is characterised in that it is single that the correlation signal (K) is that sub-pixel drives
The corresponding gated sweep signal of next line (G (n+1)) is expert at by unit.
4. pixel-driving circuit as claimed in claim 2 or claim 3, it is characterised in that the primary area pixel electrode constitutes primary area liquid
One end of brilliant electric capacity (Clc1) and one end of primary area storage capacitance (Cst1), the other end of primary area liquid crystal capacitance (Clc1) are accessed
First common electric voltage (Vcom1), the other end of primary area storage capacitance (Cst1) access the second common electric voltage (Vcom2)；Described time
Area's pixel electrode constitutes the one end and one end of secondary area's storage capacitance (Cst2) in time area's liquid crystal capacitance (Clc2), secondary area's liquid crystal electricity
The other end for holding (Clc2) accesses the first common electric voltage (Vcom1), and the other end access second of secondary area's storage capacitance (Cst2) is public
Common voltage (Vcom2)；The drain electrode of electric leakage TFT (T3) connects one end of drop-down electric capacity (C3), another termination of drop-down electric capacity (C3)
Enter the second common electric voltage (Vcom2).
5. pixel-driving circuit as claimed in claim 2 or claim 3, it is characterised in that the primary area pixel electrode constitutes primary area liquid
One end of brilliant electric capacity (Clc1) and one end of primary area storage capacitance (Cst1), the other end of primary area liquid crystal capacitance (Clc1) are accessed
First common electric voltage (Vcom1), the other end of primary area storage capacitance (Cst1) access the second common electric voltage (Vcom2)；Described time
Area's pixel electrode constitutes the one end and one end of secondary area's storage capacitance (Cst2) in time area's liquid crystal capacitance (Clc2), secondary area's liquid crystal electricity
The other end for holding (Clc2) accesses the first common electric voltage (Vcom1), and the other end access second of secondary area's storage capacitance (Cst2) is public
Common voltage (Vcom2)；The drain electrode of electric leakage TFT (T3) is directly accessed the second common electric voltage (Vcom2).
6. a kind of display panels, it is characterised in that with pixel-driving circuit, the pixel-driving circuit is included in matrix
Multiple sub-pixel driver elements of formula arrangement, each sub-pixel driver element include primary area TFT (T1), secondary area TFT (T2), electric leakage
TFT (T3), and switching TFT (T4)；
If n, m are the grid of positive integer, the grid of primary area TFT (T1) and secondary area TFT (T2) and access jointly sub-pixel driving list
The be expert at corresponding gated sweep signal (G (n)) of unit；The source electrode of the source electrode of primary area TFT (T1) and secondary area TFT (T2) is connect jointly
Enter the corresponding data signal (D (m)) of sub-pixel driver element column；The drain electrode connection primary area pixel electrode of primary area TFT (T1),
The drain electrode connection time area pixel electrode of secondary area TFT (T2)；The drain electrode of grid connection switching TFT (T4) of electric leakage TFT (T3), source electrode
The drain electrode of connection time area TFT (T2)；
The grid of switching TFT (T4) connects the first control end (A), and drain electrode the second control end of connection (B), source electrode access correlation signal
(K)；When first control end (A) provides high potential signal control switching TFT (T4) opens, second control end (B)
Signal is not provided, correlation signal (K) accesses the grid of electric leakage TFT (T3) so that show access into big viewing angle compensation pattern；When described
When first control end (A) provides low-potential signal control switching TFT (T4) shut-off, second control end (B) provides electronegative potential
Signal, the low-potential signal that second control end (B) provides access the grid of electric leakage TFT (T3), and electric leakage TFT (T3) is turned off,
So that showing access into peep-proof pattern.
7. display panels as claimed in claim 6, it is characterised in that it is single that the correlation signal (K) is that sub-pixel drives
The be expert at corresponding gated sweep signal (G (n)) of unit.
8. display panels as claimed in claim 6, it is characterised in that it is single that the correlation signal (K) is that sub-pixel drives
The corresponding gated sweep signal of next line (G (n+1)) is expert at by unit.
9. display panels as claimed in claim 7 or 8, it is characterised in that the primary area pixel electrode constitutes primary area liquid
One end of brilliant electric capacity (Clc1) and one end of primary area storage capacitance (Cst1), the other end of primary area liquid crystal capacitance (Clc1) are accessed
First common electric voltage (Vcom1), the other end of primary area storage capacitance (Cst1) access the second common electric voltage (Vcom2)；Described time
Area's pixel electrode constitutes the one end and one end of secondary area's storage capacitance (Cst2) in time area's liquid crystal capacitance (Clc2), secondary area's liquid crystal electricity
The other end for holding (Clc2) accesses the first common electric voltage (Vcom1), and the other end access second of secondary area's storage capacitance (Cst2) is public
Common voltage (Vcom2)；The drain electrode of electric leakage TFT (T3) connects one end of drop-down electric capacity (C3), and one end of drop-down electric capacity (C3) is accessed
Second common electric voltage (Vcom2).
10. display panels as claimed in claim 7 or 8, it is characterised in that the primary area pixel electrode constitutes primary area liquid
One end of brilliant electric capacity (Clc1) and one end of primary area storage capacitance (Cst1), the other end of primary area liquid crystal capacitance (Clc1) are accessed
First common electric voltage (Vcom1), the other end of primary area storage capacitance (Cst1) access the second common electric voltage (Vcom2)；Described time
Area's pixel electrode constitutes the one end and one end of secondary area's storage capacitance (Cst2) in time area's liquid crystal capacitance (Clc2), secondary area's liquid crystal electricity
The other end for holding (Clc2) accesses the first common electric voltage (Vcom1), and the other end access second of secondary area's storage capacitance (Cst2) is public
Common voltage (Vcom2)；The drain electrode of electric leakage TFT (T3) is directly accessed the second common electric voltage (Vcom2).
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| CN201710063457.0A CN106597714A (en) | 2017-02-03 | 2017-02-03 | Pixel driving circuit and liquid crystal display panel |
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| CN201710063457.0A CN106597714A (en) | 2017-02-03 | 2017-02-03 | Pixel driving circuit and liquid crystal display panel |
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| CN201710063457.0A Pending CN106597714A (en) | 2017-02-03 | 2017-02-03 | Pixel driving circuit and liquid crystal display panel |
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| CN108932414A (en) * | 2017-05-25 | 2018-12-04 | 林建松 | Display screen iris protective device |
| CN109215607A (en) * | 2018-11-12 | 2019-01-15 | 惠科股份有限公司 | Driving method, device and the computer equipment of display panel |
| CN109725448A (en) * | 2019-03-19 | 2019-05-07 | 京东方科技集团股份有限公司 | A kind of control method of display device and display device |
| CN109817151A (en) * | 2018-10-09 | 2019-05-28 | 友达光电股份有限公司 | Display device |
| WO2020093518A1 (en) * | 2018-11-09 | 2020-05-14 | 惠科股份有限公司 | Pixel driving circuit, pixel structure and display apparatus |
| CN111326122A (en) * | 2018-12-14 | 2020-06-23 | 惠科股份有限公司 | Driving circuit and driving device of display panel and display device |
| CN113257203A (en) * | 2021-05-12 | 2021-08-13 | Tcl华星光电技术有限公司 | Pixel driving circuit and liquid crystal display panel |
| WO2021174670A1 (en) * | 2020-03-05 | 2021-09-10 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving circuit and driving method therefor, and liquid crystal display panel |
| CN114299892A (en) * | 2021-12-24 | 2022-04-08 | 长沙惠科光电有限公司 | Pixel structure, pixel driving method, display panel and display device |
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| CN114299892A (en) * | 2021-12-24 | 2022-04-08 | 长沙惠科光电有限公司 | Pixel structure, pixel driving method, display panel and display device |
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