CN106932973B - The changeable liquid crystal display device in visual angle - Google Patents
The changeable liquid crystal display device in visual angle Download PDFInfo
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- CN106932973B CN106932973B CN201710253402.6A CN201710253402A CN106932973B CN 106932973 B CN106932973 B CN 106932973B CN 201710253402 A CN201710253402 A CN 201710253402A CN 106932973 B CN106932973 B CN 106932973B
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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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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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
Abstract
A kind of liquid crystal display device that visual angle is changeable, including first substrate, the second substrate being oppositely arranged with the first substrate and the liquid crystal layer between the first substrate and the second substrate, wherein set the first electrode portion and second electrode portion that viewing angle control electrode on the first substrate includes mutually insulated setting, the sub-pixel of the corresponding covering a portion in first electrode portion, the sub-pixel of the corresponding covering another part in second electrode portion, the driving circuit of the liquid crystal display device applies periodic first alternating voltage and the second alternating voltage to first electrode portion and second electrode portion respectively, bright invisible subsidy caused by this complementarity and phase difference of driving framework using two groups of alternating voltages is repaid to solve the problems, such as panel flash, it can support 60Hz refresh rate, display panel is in the design, it does not need to select the high timing controller energy advised The function of reaching width view angle switch reduces the requirement to system fan-out capability, has saved design cost.
Description
Technical field
The present invention relates to the technical field of liquid crystal display, the liquid crystal display device that can be switched more particularly to a kind of visual angle.
Background technique
Liquid crystal display device (liquid crystal display, LCD) has good, small in size, light-weight, the low drive of image quality
Dynamic voltage, low-power consumption, radiationless and relatively low manufacturing cost advantage, occupy an leading position in flat display field.
Present liquid crystal display device gradually develops towards wide viewing angle direction, such as uses in-plane-switching mode (IPS) or edge
Wider visual angle may be implemented in the liquid crystal display device of field switch mode (FFS).The design of wide viewing angle so that user from each
Complete and distortionless picture can be seen in a direction.However, today's society people increasingly focus on protecting the privacy of oneself, have
Many things simultaneously do not like to take out and share with people.In public, always wish oneself see the mobile phone or browse computer when
Waiting content is secrecy.Therefore, the display of single visual angle mode is no longer satisfied the demand of user.In addition to wide viewing angle
Except demand, under the occasion for needing peep-proof, it is also desirable to can switch or be adjusted to narrow viewing angle mode for display device.
In order to realize that the wide viewing angle to liquid crystal display device is switched over narrow viewing angle, having a kind of mode at present is to utilize coloured silk
The viewing angle control electrode of the side colo(u)r filter substrate (CF) applies a vertical electric field to liquid crystal molecule, by changing liquid crystal molecule
Inclination angle realize the switching of wide viewing angle and narrow viewing angle.Fig. 1 is a kind of structure of the existing liquid crystal display device under wide viewing angle
Schematic diagram, Fig. 2 are structural schematic diagram of the liquid crystal display device under narrow viewing angle in Fig. 1, please join Fig. 1 and Fig. 2, liquid crystal display dress
It sets including first substrate 11, the second substrate 12 and the liquid crystal layer 13 between first substrate 11 and the second substrate 12, the first base
Plate 11 is equipped with viewing angle control electrode 111.As shown in Figure 1, the viewing angle control electrode in wide viewing angle display, on first substrate 11
111 do not give voltage, and liquid crystal display device realizes that wide viewing angle is shown.As shown in Fig. 2, when needing narrow viewing angle to show, first substrate
Viewing angle control electrode 111 on 11 gives voltage, so that generating vertical electric field E (such as between first substrate 11 and the second substrate 12
In figure shown in arrow), the liquid crystal molecule in liquid crystal layer 13 tilts under the electric field action of vertical direction, and then it is existing to generate light leakage
As reducing picture contrast, narrow viewing angle is finally realized.
But under existing width ocular surface type structure, the electric field that is applied in different perspectives mode between two substrates
It is inconsistent, because of the phenomenon that electric field asymmetry causes panel flash.In order to solve the problems, such as panel flash, need using frame frequency
(frame frequency) is the driving circuit of 120Hz, therefore the requirement to system fan-out capability can be double, causes in design
Difficult and cost improves.
Summary of the invention
The purpose of the present invention is to provide the liquid crystal display devices that a kind of visual angle can be switched, and solve in existing width ocular surface
Under type structure, because of the phenomenon that electric field asymmetry causes panel flash, in order to solve the problems, such as panel flash, need using height
The driving circuit of frame frequency causes the requirement to system fan-out capability can be double, causes to design the problem of difficult and cost improves.
The embodiment of the present invention provides a kind of liquid crystal display device that visual angle is changeable, including first substrate and first base
The second substrate that plate is oppositely arranged and the liquid crystal layer between the first substrate and the second substrate are set on the first substrate
There is viewing angle control electrode, is limited in the second substrate by scan line and data line and form multiple sub-pixels, set in each sub-pixel
There is pixel electrode, be additionally provided with public electrode in the second substrate, the voltage exported to the public electrode is direct current common voltage, should
Viewing angle control electrode includes the first electrode portion and second electrode portion of mutually insulated setting, and the corresponding covering in the first electrode portion is wherein
The sub-pixel of a part, the sub-pixel of the corresponding covering another part in the second electrode portion, is handed over applying to the viewing angle control electrode
When galvanic electricity is pressed, apply periodic first alternating voltage and the second alternating current respectively to the first electrode portion and the second electrode portion
Pressure, first alternating voltage is identical as the period of second alternating voltage and is every frame picture refreshing of the liquid crystal display device
Twice of period, in two frame pictures in each period of first alternating voltage and second alternating voltage, wherein
In one frame picture, the voltage difference between first alternating voltage and the direct current common voltage is less than second alternating voltage and this is straight
Flow the voltage difference between common voltage, the electricity in another frame picture, between first alternating voltage and the direct current common voltage
Pressure difference is greater than the voltage difference between second alternating voltage and the direct current common voltage.
Further, first alternating voltage and second alternating voltage are square wave or are sine wave.
Further, first alternating voltage and second alternating voltage are the waveform along trunnion axis mirror image each other.
Further, first alternating voltage and second alternating voltage are the waveform along vertical axis mirror image each other.
Further, which includes the multiple first electrode items for being spaced apart from each other and being electrically connected, should
Second electrode portion includes the multiple second electrode items for being spaced apart from each other and being electrically connected, and multiple first electrode item is more with this
Mutually nested setting between a second electrode item.
Further, multiple first electrode item and multiple second electrode item extend each along scanning line direction, this is more
A first electrode item respectively corresponds the sub-pixel that covering is located at odd-numbered line or even number line, and multiple second electrode item, which respectively corresponds, to be covered
Lid is located at the sub-pixel of even number line or odd-numbered line.
Further, multiple first electrode item and multiple second electrode item extend each along data line direction, this is more
A first electrode item respectively corresponds the sub-pixel that covering is located at odd column or even column, and multiple second electrode item, which respectively corresponds, to be covered
Lid is located at the sub-pixel of even column or odd column.
Further, which further includes the first public conduction being electrically connected with multiple first electrode item
Item, the second electrode portion further include the second public conductive bar being electrically connected with multiple second electrode item, the first electrode portion
Respectively it is in pectination with the second electrode portion and is mutually inserted nested setting.
Further, the liquid crystal molecule in the liquid crystal layer be positive liquid crystal molecules, to the first electrode portion and this second
When electrode portion applies first alternating voltage and second alternating voltage respectively, leniently field-of-view mode switches the liquid crystal display device
To narrow viewing angle mode.
Further, the liquid crystal molecule in the liquid crystal layer be negative liquid crystal molecule, to the first electrode portion and this second
Electrode portion applies first alternating voltage and respectively when second alternating voltage, and the liquid crystal display device is from narrow viewing angle pattern switching
To wide viewing angle mode.
The changeable liquid crystal display device in visual angle provided in an embodiment of the present invention, if viewing angle control electricity on the first substrate
Pole includes the first electrode portion and second electrode portion of mutually insulated setting, the sub- picture of the corresponding covering a portion in first electrode portion
Element, and the sub-pixel of the corresponding covering another part in second electrode portion, the driving circuit of the liquid crystal display device is respectively to the first electricity
Pole portion and second electrode portion apply periodic first alternating voltage and the second alternating voltage, this driving framework utilizes two groups of exchanges
Bright invisible subsidy caused by the complementarity and phase difference of voltage is repaid to solve the problems, such as panel flash, can support 60Hz refresh rate,
Display panel in the design, does not need the function of selecting the high timing controller advised that can reach width view angle switch, reduces
Requirement to system fan-out capability, has saved design cost.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the existing liquid crystal display device under wide viewing angle.
Fig. 2 is structural schematic diagram of the liquid crystal display device under narrow viewing angle in Fig. 1.
Fig. 3 is structural schematic diagram of the liquid crystal display device under wide viewing angle in first embodiment of the invention.
Fig. 4 is structural schematic diagram of the liquid crystal display device under narrow viewing angle in first embodiment of the invention.
Fig. 5 is the planar structure schematic diagram of the viewing angle control electrode in Fig. 3 on first substrate.
Fig. 6 is the electrical block diagram of liquid crystal display device in Fig. 3.
Fig. 7 a is the waveform diagram for the first alternating voltage being applied in first electrode portion in first embodiment of the invention.
Fig. 7 b is the waveform diagram for the second alternating voltage being applied in second electrode portion in first embodiment of the invention.
Fig. 8 a is the waveform diagram for the first alternating voltage being applied in first electrode portion in second embodiment of the invention.
Fig. 8 b is the waveform diagram for the second alternating voltage being applied in second electrode portion in second embodiment of the invention.
Fig. 9 a is the waveform diagram for the first alternating voltage being applied in first electrode portion in third embodiment of the invention.
Fig. 9 b is the waveform diagram for the second alternating voltage being applied in second electrode portion in third embodiment of the invention.
Figure 10 is the structural schematic diagram of liquid crystal display device in fourth embodiment of the invention.
Figure 11 is the planar structure schematic diagram of the viewing angle control electrode in Figure 10 on first substrate.
Figure 12 is the electrical block diagram of liquid crystal display device in Figure 10.
Figure 13 is structural schematic diagram of the liquid crystal display device under narrow viewing angle in fifth embodiment of the invention.
Figure 14 is structural schematic diagram of the liquid crystal display device under wide viewing angle in fifth embodiment of the invention.
Figure 15 a and Figure 15 b is the planar structure schematic diagram of liquid crystal display device in various embodiments of the present invention.
Specific embodiment
It is of the invention to reach the technical approach and effect that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Accompanying drawings and embodiments, to a specific embodiment of the invention, structure, feature and its effect, detailed description is as follows.
[first embodiment]
Fig. 3 is structural schematic diagram of the liquid crystal display device under wide viewing angle in first embodiment of the invention, and Fig. 4 is the present invention
Structural schematic diagram of the liquid crystal display device under narrow viewing angle in first embodiment, please join Fig. 3 to Fig. 4, the liquid crystal display device packet
Include the second substrate 22 that first substrate 21 and first substrate 21 are oppositely arranged and between first substrate 21 and the second substrate 22
Liquid crystal layer 23.
Liquid crystal display device provided in this embodiment, be suitable for plane inner switching type (In-Plane Switching,
IPS), the liquid crystal display device of fringe field switch type (Fringe Field Switching, FFS) isotype, public electrode
It is both formed in same substrate (i.e. array substrate) with pixel electrode, applies display between public electrode and pixel electrode
When electric field, liquid crystal molecule with the substantially parallel plane internal rotation of substrate to obtain wider visual angle.With edge in the present embodiment
The liquid crystal display device is illustrated for electric field switch type (FFS), but is not invented without being limited thereto.
First substrate 21 is, for example, colored filter substrate, and the second substrate 22 is, for example, thin-film transistor array base-plate.The
One substrate 21 is equipped with the first polaroid 219 in the side backwards to liquid crystal layer 23, and the second substrate 22 is in the side backwards to liquid crystal layer 23
Equipped with the second polaroid 229, the light transmission shaft of the first polaroid 219 and the light transmission shaft of the second polaroid 229 are mutually perpendicular to.
First substrate 21 is equipped with viewing angle control electrode 210 in the side towards liquid crystal layer 23, and the second substrate 22 is towards liquid
The side of crystal layer 23 is equipped with public electrode 225 (common electrode), 227 (pixel of insulating layer 226 and pixel electrode
electrode).It is to be appreciated that in the present embodiment, only illustrated on first substrate 21 and the second substrate 22 and the present embodiment
Relevant film layer structure is then omitted with the incoherent film layer structure of the present embodiment.
Fig. 5 is the planar structure schematic diagram of the viewing angle control electrode in Fig. 3 on first substrate, and Fig. 6 is liquid crystal display in Fig. 3
The electrical block diagram of device, incorporated by reference to Fig. 5 to Fig. 6, the second substrate 22 is additionally provided with scanning in the side towards liquid crystal layer 23
Line 222, data line 223 and thin film transistor (TFT) (TFT) 224.Wherein, multi-strip scanning line 222 intersects with multiple data lines 223
Limit the multiple sub-pixel SP (sub-pixel) formed in array distribution.Pixel electrode 227 is arranged in each sub-pixel SP.
Each thin film transistor (TFT) 224 is located near the position that scan line 222 is intersected with data line 223.Each thin film transistor (TFT) 224 with it is right
The scan line 222 and data line 223 and pixel electrode 227 answered are electrically connected.Specifically, each thin film transistor (TFT) 224 includes
Grid, semiconductor layer, source electrode and drain electrode, wherein grid is electrically connected to corresponding scan line 222, and source electrode is electrically connected to correspondence
Data line 223, drain electrode be electrically connected to corresponding pixel electrode 227.
First electrode portion 211 and second electrode portion 212 of the viewing angle control electrode 210 including mutually insulated setting, first
The sub-pixel SP of the corresponding a portion for covering the liquid crystal display device of electrode portion 211, the corresponding covering in second electrode portion 212 should
The sub-pixel SP of another part of liquid crystal display device.
Specifically, first electrode portion 211 includes the multiple first electrode items for being spaced and being electrically connected that are parallel to each other
211a, second electrode portion 212 includes the multiple second electrode 212a for being spaced and being electrically connected that are parallel to each other, multiple
Mutually nested setting between first electrode 211a and multiple second electrode 212a.
Further, first electrode portion 211 further include be electrically connected with multiple first electrode 211a it is first public
Conductive bar 211b, second electrode portion 212 further include the second public conductive bar being electrically connected with multiple second electrode 212a
212b, first electrode portion 211 and second electrode portion 212 in pectination and are mutually inserted nested setting respectively.
In the present embodiment, multiple first electrode 211a and multiple second electrode 212a are each along scan line 222
Direction extends, and multiple first electrode 211a respectively corresponds the sub-pixel SP that covering is located at odd-numbered line or even number line, multiple
Second electrode 212a respectively corresponds the sub-pixel SP that covering is located at even number line or odd-numbered line.
Tin indium oxide (ITO), oxidation specifically can be used in viewing angle control electrode 210, public electrode 225 and pixel electrode 227
The electrically conducting transparents materials such as indium zinc (IZO) are made.Wherein, viewing angle control electrode 210 is for controlling view angle switch, public electrode 225
The common voltage (Vcom) shown for applying picture, signal is shown pixel electrode 227 for receiving data with controlling picture
Grayscale.
In the present embodiment, pixel electrode 227 is located at 225 top of public electrode, is equipped with insulating layer 226, but this between the two
Invent without being limited thereto, in other embodiments, pixel electrode 227 can also be located at the lower section of public electrode 225.In addition, working as the liquid
When crystal device uses plane inner switching type (IPS) mode, public electrode 225 and pixel electrode 227 may be located on same
In layer and mutually insulated is spaced apart.
Liquid crystal molecule is generally divided into positive liquid crystal molecules and negative liquid crystal molecule.Liquid in the present embodiment, in liquid crystal layer 23
Brilliant molecule is positive liquid crystal molecules, and positive liquid crystal molecules, which have, responds fast advantage.Such as Fig. 3, in original state (i.e. liquid crystal display
Device does not apply the situation of any voltage) under, the positive liquid crystal molecules in liquid crystal layer 23 present substantially parallel with substrate 21,22
The long axis direction of lying posture, positive liquid crystal molecules is substantially parallel with the surface of substrate 21,22.In practical applications, liquid crystal layer
It can have the initial pre-tilt angle of very little, the range of the initial pre-tilt angle between positive liquid crystal molecules in 23 and substrate 21,22
It may be less than or be equal to 10 degree, it may be assumed that 0 θ≤10 ° ° ≦.
Due to being equipped with viewing angle control electrode 210 on first substrate 21, it is applied on viewing angle control electrode 210 by control
Voltage, can make to generate different voltage differences between viewing angle control electrode 210 and public electrode 225, and then make the liquid crystal display
Device switches between wide viewing angle mode and narrow viewing angle mode.
It please join Fig. 3, when the no applied voltage difference between viewing angle control electrode 210 and public electrode 225 or apply smaller
Voltage difference when, the tilt angle of the positive liquid crystal molecules in liquid crystal layer 23 does not vary widely, by pixel electrode 227 and public
The face internal electric field driving liquid crystal molecule formed between common electrode 225 is in the plane internal rotation parallel with substrate 21,22, liquid crystal molecule
Realize that wide viewing angle is shown under the effect of stronger face internal electric field.
It please join Fig. 4, when applying biggish voltage difference between viewing angle control electrode 210 and public electrode 225, at two
It will form between substrate 21,22 stronger vertical electric field E (as shown in Fig. 4 arrow), positive liquid crystal molecules are long under electric field action
Axis direction has the tendency that rotating along being parallel to electric field line direction, therefore positive liquid crystal molecules are issued in vertical electric field E effect
Raw larger deflection, the tilt angle between liquid crystal molecule and substrate 21,22 increase and tilt and (deflect to inclination from lying posture
Posture) it is mismatched so that passing through the light of liquid crystal molecule due to phase delay and with upper down polaroid 219,229, leakage occurs
Optical phenomenon causes the picture contrast when strabismus watches screen to reduce, and influences viewing effect and visual angle reduces, liquid crystal display dress
It sets and switches to narrow viewing angle and show.
That is, as the voltage difference between viewing angle control electrode 210 and public electrode 225 increases, positivity liquid crystal point
The tilt angle of son is gradually increased, and visual angle is smaller and smaller, finally realizes narrow viewing angle；With viewing angle control electrode 210 and common electrical
Voltage difference between pole 225 reduces, and the tilt angle of positive liquid crystal molecules is gradually decrease to original state (i.e. lying posture), depending on
Angle is increasing, finally realizes wide viewing angle.
Fig. 7 a is the waveform diagram for the first alternating voltage being applied in first electrode portion in first embodiment of the invention,
Fig. 7 b is the waveform diagram for the second alternating voltage being applied in second electrode portion in first embodiment of the invention.It please join Fig. 7 a
To Fig. 7 b, which (no matter under wide viewing angle or under narrow viewing angle), exports in display to public electrode 225
Voltage be direct current common voltage 30 (i.e. DC Vcom).
In order to realize that wide viewing angle is shown, the voltage applied to viewing angle control electrode 210 can be and the direct current the present embodiment
Common voltage 30 has the DC voltage of identical amplitude, for example, applies respectively to first electrode portion 211 and second electrode portion 212 and
The direct current common voltage 30 has the DC voltage of identical amplitude, at this time between viewing angle control electrode 210 and public electrode 225
Voltage difference is zero, to realize that wide viewing angle is shown.
For the present embodiment in order to realize that narrow viewing angle is shown, the voltage applied to viewing angle control electrode 210 is alternating voltage.In order to
Realize that narrow viewing angle is shown, when applying alternating voltage to viewing angle control electrode 210, specifically to first electrode portion 211 and second
Electrode portion 212 applies periodic first alternating voltage 31 and the second alternating voltage 32 respectively, it may be assumed that applies to first electrode portion 211
Add periodic first alternating voltage 31, applies periodic second alternating voltage 32 to second electrode portion 212.Wherein, the liquid
Every frame (frame) the picture refreshing period of crystal device is assumed to be T1, the first alternating voltage 31 and the second alternating voltage 32
Period identical (being assumed to be T2) and be the liquid crystal display device every frame picture refreshing period twice (i.e. T2=2*T1), i.e.,
In each cycle T 2 of the first alternating voltage 31 and the second alternating voltage 32, which refreshes two frame pictures altogether,
As shown in figs. 7 a and 7b.
Moreover, in two frame pictures being located in each cycle T 2 of the first alternating voltage 31 and the second alternating voltage 32,
Wherein in a frame picture, voltage difference between the first alternating voltage 31 and direct current common voltage 30 less than the second alternating voltage 32 with
Voltage difference between direct current common voltage 30, in another frame picture, between the first alternating voltage 31 and direct current common voltage 30
Voltage difference be greater than voltage difference between the second alternating voltage 32 and direct current common voltage 30.
Specific to the present embodiment, it is assumed that the direct current common voltage 30 exported to public electrode 225 is 3V, in a cycle T2
In interior two frame picture Frame 1, Frame 2, in first frame picture Frame 1, the first alternating voltage 31 is 2V, and second hands over
Galvanic electricity pressure 32 is -2V, and in the second frame picture Frame 2, the first alternating voltage 31 is -6V, and the second alternating voltage 32 is 6V.Cause
This, the voltage in the present embodiment, in first frame picture Frame 1, between the first alternating voltage 31 and direct current common voltage 30
Poor (for 1V) is less than the voltage difference between the second alternating voltage 32 and direct current common voltage 30 (for 5V)；In the second frame picture
In Frame 2, the voltage difference (for 9V) between the first alternating voltage 31 and direct current common voltage 30 is greater than the second alternating voltage 32
Voltage difference between direct current common voltage 30 (for 3V).
In first frame picture Frame 1, the voltage difference between the first alternating voltage 31 and direct current common voltage 30 is smaller,
Voltage difference between second alternating voltage 32 and direct current common voltage 30 is larger, since the first alternating voltage 31 is consequently exerted at visual angle
In the first electrode portion 211 of coordination electrode 210, the second alternating voltage 32 is consequently exerted at the second electrode of viewing angle control electrode 210
In portion 212, so that weaker vertical electric field is formed between two substrates 21,22 in position corresponding with first electrode portion 211,
Stronger vertical electric field is formed in position corresponding with second electrode portion 212, leads to the sub- picture covered by second electrode portion 212
The deflection angle of liquid crystal molecule within the scope of plain SP is significantly greater than the liquid within the scope of the sub-pixel SP covered by first electrode portion 211
The deflection angle of brilliant molecule, thus the liquid crystal display device it is less in position corresponding with first electrode portion 211 light leakage and compared with
Bright, in position corresponding with second electrode portion 212, light leakage is more and darker.
In the second frame picture Frame 2, the voltage difference between the first alternating voltage 31 and direct current common voltage 30 is larger,
Voltage difference between second alternating voltage 32 and direct current common voltage 30 is smaller, since the first alternating voltage 31 is consequently exerted at visual angle
In the first electrode portion 211 of coordination electrode 210, the second alternating voltage 32 is consequently exerted at the second electrode of viewing angle control electrode 210
In portion 212, so that stronger vertical electric field is formed in position corresponding with first electrode portion 211 between two substrates 21,22,
Weaker vertical electric field is formed in position corresponding with second electrode portion 212, leads to the sub- picture covered by first electrode portion 211
The deflection angle of liquid crystal molecule within the scope of plain SP is significantly greater than the liquid within the scope of the sub-pixel SP covered by second electrode portion 212
The deflection angle of brilliant molecule, thus the liquid crystal display device it is less in position corresponding with second electrode portion 212 light leakage and compared with
Bright, in position corresponding with first electrode portion 211, light leakage is more and darker.
Preferably, in the present embodiment, the first alternating voltage 31 and the second alternating voltage 32 are along trunnion axis (i.e. voltage zero
Axis) mirror image each other waveform.
Preferably, the first alternating voltage 31 and the second alternating voltage 32 are square wave, and the first alternating voltage 31 and
Two alternating voltages 32 complete level jump between two frame picture Frame 1, Frame 2, and (the first alternating voltage 31 is by high electricity
It puts down toward low level and jumps, the second alternating voltage 32 is jumped from low level toward high level).
Liquid crystal display device provided in this embodiment, the viewing angle control electrode 210 being located on first substrate 21 include mutual
The first electrode portion 211 and second electrode portion 212 of insulation set, the sub- picture of the corresponding covering a portion in first electrode portion 211
Plain SP, and the sub-pixel SP of the corresponding covering another part in second electrode portion 212, the driving circuit of the liquid crystal display device respectively to
First electrode portion 211 and second electrode portion 212 apply periodic first alternating voltage 31 and the second alternating voltage 32, this driving
Bright invisible subsidy caused by complementarity and phase difference of the framework using two groups of alternating voltages is repaid to solve the problems, such as panel flash, can be with
60Hz refresh rate, display panel is supported in the design, not to need to select high T-con IC (i.e. timing controller) energy advised
The function of reaching width view angle switch reduces the requirement to system fan-out capability, has saved design cost.
In order to apply voltage to the viewing angle control electrode 210 on first substrate 21, the liquid crystal display device is non-aobvious on periphery
Show region, the first electrode portion 211 of viewing angle control electrode 210 and second electrode portion 212 can be passed through conducting resinl (not shown) point
It is not conductively connected to the second substrate 22, the driving chip 24 being bundled in the second substrate 22 can be distinguished voltage by conducting resinl
It is applied in the first electrode portion 211 and second electrode portion 212 of the viewing angle control electrode 210 of first substrate 21.
[second embodiment]
Fig. 8 a is the waveform diagram for the first alternating voltage being applied in first electrode portion in second embodiment of the invention,
Fig. 8 b is the waveform diagram for the second alternating voltage being applied in second electrode portion in second embodiment of the invention, in order to realize
Narrow viewing angle shows, the first alternating voltage 31 and the second alternating voltage being applied in first electrode portion 211 and second electrode portion 212
32 can be respectively as shown in Fig. 8 a to Fig. 8 b.
In the present embodiment, it is assumed that the direct current common voltage 30 exported to public electrode 225 is 3V, in a cycle T2
In two frame picture Frame 1, Frame 2, in first frame picture Frame 1, the first alternating voltage 31 is 6V, the second alternating current
Pressure 32 is -2V, and in the second frame picture Frame 2, the first alternating voltage 31 is -2V, and the second alternating voltage 32 is 6V.Therefore,
In first frame picture Frame 1, the voltage difference (for 3V) between the first alternating voltage 31 and direct current common voltage 30 is less than
Voltage difference between two alternating voltages 32 and direct current common voltage 30 (for 5V)；In the second frame picture Frame 2, the first exchange
Voltage difference (for 5V) between voltage 31 and direct current common voltage 30 be greater than the second alternating voltage 32 and direct current common voltage 30 it
Between voltage difference (for 3V).
In first frame picture Frame 1, the voltage difference between the first alternating voltage 31 and direct current common voltage 30 is smaller,
Voltage difference between second alternating voltage 32 and direct current common voltage 30 is larger, since the first alternating voltage 31 is consequently exerted at visual angle
In the first electrode portion 211 of coordination electrode 210, the second alternating voltage 32 is consequently exerted at the second electrode of viewing angle control electrode 210
In portion 212, so that weaker vertical electric field is formed between two substrates 21,22 in position corresponding with first electrode portion 211,
Stronger vertical electric field is formed in position corresponding with second electrode portion 212, leads to the sub- picture covered by second electrode portion 212
The deflection angle of liquid crystal molecule within the scope of plain SP is significantly greater than the liquid within the scope of the sub-pixel SP covered by first electrode portion 211
The deflection angle of brilliant molecule, thus the liquid crystal display device it is less in position corresponding with first electrode portion 211 light leakage and compared with
Bright, in position corresponding with second electrode portion 212, light leakage is more and darker.
In the second frame picture Frame 2, the voltage difference between the first alternating voltage 31 and direct current common voltage 30 is larger,
Voltage difference between second alternating voltage 32 and direct current common voltage 30 is smaller, since the first alternating voltage 31 is consequently exerted at visual angle
In the first electrode portion 211 of coordination electrode 210, the second alternating voltage 32 is consequently exerted at the second electrode of viewing angle control electrode 210
In portion 212, so that stronger vertical electric field is formed in position corresponding with first electrode portion 211 between two substrates 21,22,
Weaker vertical electric field is formed in position corresponding with second electrode portion 212, leads to the sub- picture covered by first electrode portion 211
The deflection angle of liquid crystal molecule within the scope of plain SP is significantly greater than the liquid within the scope of the sub-pixel SP covered by second electrode portion 212
The deflection angle of brilliant molecule, thus the liquid crystal display device it is less in position corresponding with second electrode portion 212 light leakage and compared with
Bright, in position corresponding with first electrode portion 211, light leakage is more and darker.
Preferably, in the present embodiment, the first alternating voltage 31 and the second alternating voltage 32 are that (i.e. two frames are drawn along vertical axis
Central vertical axis between face Frame 1, Frame 2) mirror image each other waveform.
[3rd embodiment]
Fig. 9 a is the waveform diagram for the first alternating voltage being applied in first electrode portion in third embodiment of the invention,
Fig. 9 b is the waveform diagram for the second alternating voltage being applied in second electrode portion in third embodiment of the invention, in order to realize
Narrow viewing angle shows, the first alternating voltage 31 and the second alternating voltage being applied in first electrode portion 211 and second electrode portion 212
32 can be respectively as shown in Fig. 9 a to Fig. 9 b.
I.e. in addition to above-mentioned square wave, the waveform of the first alternating voltage 31 and the second alternating voltage 32 can also be sine wave,
The purpose of the present invention equally may be implemented.
[fourth embodiment]
Figure 10 is the structural schematic diagram of liquid crystal display device in fourth embodiment of the invention, and Figure 11 is first substrate in Figure 10
On viewing angle control electrode planar structure schematic diagram, Figure 12 be Figure 10 in liquid crystal display device electrical block diagram, ask
Join Figure 10 to Figure 12, the present embodiment and the difference of above-mentioned first embodiment are, in the present embodiment, first electrode portion 211
Multiple first electrode 211a and multiple second electrode 212a in second electrode portion 212 extend each along 223 direction of data line,
Multiple first electrode 211a respectively corresponds the sub-pixel SP that covering is located at odd column or even column, multiple second electrode item
212a respectively corresponds the sub-pixel SP that covering is located at even column or odd column, and the purpose of the present invention equally may be implemented, in remaining
Hold the explanation that can join above-mentioned first embodiment, details are not described herein.
[the 5th embodiment]
Figure 13 is structural schematic diagram of the liquid crystal display device under narrow viewing angle in fifth embodiment of the invention, and Figure 14 is this hair
Structural schematic diagram of the liquid crystal display device under wide viewing angle in bright 5th embodiment, please join Figure 13 to Figure 14, the present embodiment with it is upper
The main distinction for stating first embodiment is that liquid crystal layer 23 uses negative liquid crystal molecule in the present embodiment, in original state (i.e. liquid
Crystal device does not apply the situation of any voltage) under, the negative liquid crystal molecule in liquid crystal layer 23 has relative to substrate 21,22
There is biggish initial pre-tilt angle (ginseng Figure 13), i.e., negative liquid crystal molecule is in the initial state relative to substrate 21,22 inclined appearances
State.
It please join Figure 13, when the no applied voltage difference between viewing angle control electrode 210 and public electrode 225 or apply smaller
Voltage difference when, the tilt angle of the negative liquid crystal molecule in liquid crystal layer 23 does not vary widely, and remains as lateral attitude, makes
The light obtained across liquid crystal molecule is mismatched due to phase delay with upper down polaroid 219,229, light leakage phenomena is occurred, is led
Cause picture contrast reduction when strabismus watches screen, influences viewing effect and visual angle reduces, and liquid crystal display device realization is narrow
Visual angle is shown.
It please join Figure 14, when applying biggish voltage difference between viewing angle control electrode 210 and public electrode 225, two
It will form stronger vertical electric field E (as shown by the arrows in figure 14) between a substrate 21,22, negative liquid crystal molecule is under electric field action
Long axis direction has the tendency that rotating along perpendicular to electric field line direction, therefore negative liquid crystal molecule is under vertical electric field E effect
Larger deflection occurs, the tilt angle reduction between liquid crystal molecule and substrate 21,22 (deflects to the appearance that lies low from lateral attitude
State), cause the light leakage phenomena on screen strabismus direction that can reduce, contrast improves, which switches to wide viewing angle
Display.
That is, as the voltage difference between viewing angle control electrode 210 and public electrode 225 increases, negative liquid crystal point
The tilt angle of son is gradually reduced, and visual angle is increasing, finally realizes wide viewing angle；With viewing angle control electrode 210 and common electrical
Voltage difference between pole 225 reduces, and the tilt angle of negative liquid crystal molecule is gradually increased to original state (i.e. lateral attitude), depending on
Angle is smaller and smaller, finally realizes narrow viewing angle.
In order to realize that narrow viewing angle is shown, the voltage applied to viewing angle control electrode 210 can be and the direct current the present embodiment
Common voltage 30 has the DC voltage of identical amplitude, for example, applies respectively to first electrode portion 211 and second electrode portion 212 and
The direct current common voltage 30 has the DC voltage of identical amplitude, at this time between viewing angle control electrode 210 and public electrode 225
Voltage difference is zero, to realize that narrow viewing angle is shown.
For the present embodiment in order to realize that wide viewing angle is shown, the voltage applied to viewing angle control electrode 210 is alternating voltage, and
When applying alternating voltage to viewing angle control electrode 210, specifically applied respectively to first electrode portion 211 and second electrode portion 212
Add periodic first alternating voltage 31 and the second alternating voltage 32, wherein the first alternating voltage 31 and the second alternating voltage 32 can
With referring to the various embodiments described above, details are not described herein.
Figure 15 a and Figure 15 b are the planar structure schematic diagram of liquid crystal display device in the embodiment of the present invention, please join Figure 15 a and
Figure 15 b, the liquid crystal display device are equipped with view angle switch key 50, for issuing view angle switch to the liquid crystal display device for user
Request.View angle switch key 50 can be physical button (as shown in fig. 15 a), or software control or application program
(APP) Lai Shixian handoff functionality (width visual angle as illustrated in fig. 15b, is set by slider bar).When user needs in wide viewing angle
When switching between narrow viewing angle, view angle switch can be issued to the liquid crystal display device by operation view angle switch key 50 and asked
Ask, the voltage that is applied on viewing angle control electrode 210 finally controlled by driving chip 30, when viewing angle control electrode 210 with it is public
When voltage difference difference between electrode 225, which can be thus achieved the switching between wide viewing angle and narrow viewing angle, because
The liquid crystal display device of this embodiment of the present invention has stronger operating flexibility and convenience, reaches collection entertainment video and privacy
It maintains secrecy in the Multifunctional liquid crystal display device of one.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
It is right according to the technical essence of the invention for the equivalent embodiment of equivalent variations, but without departing from the technical solutions of the present invention
Any simple modification, equivalent change and modification made by above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of changeable liquid crystal display device in visual angle, including first substrate (21), it is oppositely arranged with the first substrate (21)
The second substrate (22) and the liquid crystal layer (23) between the first substrate (21) and the second substrate (22), first base
Plate (21) is equipped with viewing angle control electrode (210), is limited in the second substrate (22) by scan line (222) and data line (223)
It is formed multiple sub-pixels (SP), is equipped with pixel electrode (227) in each sub-pixel (SP), be additionally provided with public affairs in the second substrate (22)
Common electrode (225), the voltage exported to the public electrode (225) are direct current common voltage (30), which is characterized in that visual angle control
Electrode (210) processed includes the first electrode portion (211) and second electrode portion (212) of mutually insulated setting, the first electrode portion
(211) sub-pixel (SP) of corresponding covering a portion, the sub-pixel of the corresponding covering another part in the second electrode portion (212)
(SP), when applying alternating voltage to the viewing angle control electrode (210), to the first electrode portion (211) and the second electrode portion
(212) apply periodic first alternating voltage (31) and the second alternating voltage (32) respectively, first alternating voltage (31) with
The period of second alternating voltage (32) is identical and is twice of every frame picture refreshing period of the liquid crystal display device, is located at
In two frame pictures in each period of first alternating voltage (31) and second alternating voltage (32), a frame picture wherein
It is interior, voltage difference between first alternating voltage (31) and the direct current common voltage (30) be less than second alternating voltage (32) with
Voltage difference between the direct current common voltage (30), in another frame picture, first alternating voltage (31) and the direct current are public
Voltage difference between voltage (30) is greater than the voltage difference between second alternating voltage (32) and the direct current common voltage (30).
2. the changeable liquid crystal display device in visual angle according to claim 1, which is characterized in that first alternating voltage
(31) it is square wave or is sine wave with second alternating voltage (32).
3. the changeable liquid crystal display device in visual angle according to claim 1, which is characterized in that first alternating voltage
(31) and second alternating voltage (32) is waveform along voltage zero axle mirror image each other.
4. the changeable liquid crystal display device in visual angle according to claim 1, which is characterized in that first alternating voltage
(31) and second alternating voltage (32) is central vertical axis between two frame pictures within each period mirror image each other
Waveform.
5. the changeable liquid crystal display device in visual angle according to claim 1, which is characterized in that the first electrode portion
It (211) include the multiple first electrode items (211a) for being spaced apart from each other and being electrically connected, which includes
The multiple second electrode items (212a) for being spaced apart from each other and being electrically connected, multiple first electrode item (211a) and multiple
Mutually nested setting between second electrode item (212a).
6. the changeable liquid crystal display device in visual angle according to claim 5, which is characterized in that multiple first electrode item
(211a) and multiple second electrode item (212a) extend each along scan line (222) direction, multiple first electrode item
(211a) respectively corresponds the sub-pixel (SP) that covering is located at odd-numbered line or even number line, and multiple second electrode item (212a) is right respectively
The sub-pixel (SP) positioned at even number line or odd-numbered line should be covered.
7. the changeable liquid crystal display device in visual angle according to claim 5, which is characterized in that multiple first electrode item
(211a) and multiple second electrode item (212a) extend each along data line (223) direction, multiple first electrode item
(211a) respectively corresponds the sub-pixel (SP) that covering is located at odd column or even column, and multiple second electrode item (212a) is right respectively
The sub-pixel (SP) positioned at even column or odd column should be covered.
8. the changeable liquid crystal display device in visual angle according to claim 5, which is characterized in that the first electrode portion
It (211) further include the first public conductive bar (211b) being electrically connected with multiple first electrode item (211a), the second electrode
Portion (212) further includes the second public conductive bar (212b) being electrically connected with multiple second electrode item (212a), first electricity
Pole portion (211) in pectination and is mutually inserted nested setting respectively with the second electrode portion (212).
9. the changeable liquid crystal display device in visual angle according to claim 1, which is characterized in that in the liquid crystal layer (23)
Liquid crystal molecule is positive liquid crystal molecules, to the first electrode portion (211) and the second electrode portion (212) apply respectively this first
When alternating voltage (31) and the second alternating voltage (32), leniently field-of-view mode switches to narrow viewing angle mould to the liquid crystal display device
Formula.
10. the changeable liquid crystal display device in visual angle according to claim 1, which is characterized in that in the liquid crystal layer (23)
Liquid crystal molecule be negative liquid crystal molecule, to the first electrode portion (211) and the second electrode portion (212) apply respectively this
When one alternating voltage (31) and the second alternating voltage (32), the liquid crystal display device is from narrow viewing angle pattern switching to wide viewing angle mould
Formula.
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| CN108983462A (en) * | 2018-08-27 | 2018-12-11 | 昆山龙腾光电有限公司 | The driving method of liquid crystal display device |
| CN109166548B (en) * | 2018-10-08 | 2020-10-30 | 昆山龙腾光电股份有限公司 | Liquid crystal display with wide and narrow viewing angle switching |
| CN109243394B (en) * | 2018-10-30 | 2022-02-15 | 昆山龙腾光电股份有限公司 | Narrow viewing angle display method |
| CN109188797B (en) * | 2018-10-30 | 2021-08-17 | 昆山龙腾光电股份有限公司 | Display panel and display device |
| CN109298571B (en) * | 2018-10-30 | 2021-07-13 | 昆山龙腾光电股份有限公司 | Liquid crystal display device and driving method |
| CN109298557B (en) * | 2018-11-13 | 2021-07-13 | 昆山龙腾光电股份有限公司 | Display panel, peep-proof display method and display device |
| CN109324449B (en) * | 2018-11-15 | 2021-06-22 | 昆山龙腾光电股份有限公司 | Liquid crystal display device and driving method thereof |
| CN109856869B (en) * | 2019-03-26 | 2021-09-21 | 昆山龙腾光电股份有限公司 | Array substrate and manufacturing method thereof, liquid crystal display device and driving method |
| CN110376773B (en) * | 2019-07-22 | 2022-02-11 | 昆山龙腾光电股份有限公司 | Driving method of visual angle switchable liquid crystal display device |
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| US7952548B2 (en) * | 2007-03-09 | 2011-05-31 | Samsung Mobile Display Co., Ltd. | Electronic display device |
| WO2011048850A1 (en) * | 2009-10-21 | 2011-04-28 | シャープ株式会社 | Liquid crystal display device and method for driving liquid crystal display device |
| CN104932167B (en) * | 2015-06-25 | 2018-06-19 | 深圳市华星光电技术有限公司 | Blue phase liquid crystal display device and its driving method |
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