CN106444104B - 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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- CN106444104B CN106444104B CN201610883584.0A CN201610883584A CN106444104B CN 106444104 B CN106444104 B CN 106444104B CN 201610883584 A CN201610883584 A CN 201610883584A CN 106444104 B CN106444104 B CN 106444104B
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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
- G02F1/1323—Arrangements for providing a switchable viewing angle
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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
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- Liquid Crystal Display Device Control (AREA)
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
A kind of liquid crystal display device that visual angle is changeable, including display panel, the display panel includes 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, the first substrate is equipped with viewing angle control electrode and suspension electrode, the viewing angle control electrode and the suspension electrode mutually insulated are arranged, the second substrate is equipped with public electrode and pixel electrode, the public electrode and the pixel electrode mutually insulated are arranged, the pixel electrode is arranged in each sub-pixel and multiple pixel electrode items including being spaced apart from each other, the suspension electrode is arranged in each sub-pixel and multiple suspension electrode items including being spaced apart from each other, each suspension electrode item is correspondingly arranged with each pixel electrode item up and down respectively, the suspension electrode is in suspended state, the viewing angle control electrode is cut for applying control visual angle The voltage signal changed.
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 which the wide viewing angle to liquid crystal display device is switched over narrow viewing angle, a kind of mode is to utilize colored filter
The viewing angle control electrode of the side substrate (CF) applies a vertical electric field to liquid crystal molecule, realizes narrow viewing angle mode.Fig. 1 is existing
The structural schematic diagram of a kind of liquid crystal display device in wide viewing angle in technology, Fig. 2 be in Fig. 1 liquid crystal display device in narrow viewing angle
Structural schematic diagram, Fig. 1 and Fig. 2 please be join, liquid crystal display device includes first substrate 11, the second substrate 12 and is located at first substrate
Liquid crystal layer 13 between 11 and the second substrate 12, first substrate 11 are equipped with viewing angle control electrode 111.As shown in Figure 1, being regarded in width
When angle is shown, the viewing angle control electrode 111 on first substrate 11 does not give voltage or the voltage to very little, viewing angle control electrode 111
Potential difference very little between the public electrode (not shown) in the second substrate 12 is zero, and liquid crystal display device realizes wide viewing angle
Display.As shown in Fig. 2, the viewing angle control electrode 111 on first substrate 11 gives voltage, visual angle control when needing narrow viewing angle to show
There are biggish potential difference between public electrode on electrode 111 processed and the second substrate 12, the liquid crystal molecule in liquid crystal layer 13 exists
It is tilted while horizontal rotation because of the electric field (as shown in arrow E in figure) of vertical direction, liquid crystal display device is because of light leakage
And contrast reduces, and finally realizes narrow viewing angle.
But this mode is under wide viewing angle mode, since viewing angle control electrode does not give voltage or current potential very little, wide viewing angle
When display biggish potential difference, pixel can be generated between the pixel electrode item and viewing angle control electrode of pixel electrode (not shown)
There are stronger vertical electric fields between electrode strip and viewing angle control electrode, so that liquid crystal corresponding with each pixel electrode item point
Son generates wide-angle deflection, influences contrast and penetrance of the liquid crystal display device in the case where wide viewing angle is shown.
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, view angle switch can be achieved
The contrast and penetrance being lifted under wide viewing angle is shown simultaneously.
The embodiment of the present invention provides a kind of liquid crystal display device that visual angle is changeable, including display panel, the display panel
The second substrate that is oppositely arranged including first substrate and the first substrate and between the first substrate and the second substrate
Liquid crystal layer, the first substrate are equipped with viewing angle control electrode and suspension electrode, and the viewing angle control electrode and the suspension electrode are mutual
Insulation set, the second substrate are equipped with public electrode and pixel electrode, and the public electrode and the pixel electrode mutually insulated are set
It sets, which is arranged in each sub-pixel and multiple pixel electrode items including being spaced apart from each other, suspension electrode setting
In each sub-pixel and multiple suspension electrode items including being spaced apart from each other, each suspension electrode item is respectively and on each pixel electrode item
Under be correspondingly arranged, which is in suspended state, the viewing angle control electrode be used for applies control view angle switch voltage believe
Number.
Further, which further includes driving circuit, for applying to the viewing angle control electrode for controlling
Voltage signal needed for view angle switch processed and to the public electrode export direct current public voltage signal.
Further, which further includes viewing angle control key, is regarded for issuing to the liquid crystal display device
Angle switching request.
Further, which is physical button or virtual key.
Further, the suspension electrode between adjacent subpixels is mutually not attached to, to be provided separately.
Further, it is additionally provided with the first insulating layer on the first substrate, between the viewing angle control electrode and the suspension electrode
It is separated by first insulating layer.
Further, it is additionally provided with second insulating layer in the second substrate, by this between the public electrode and the pixel electrode
Second insulating layer separates.
Further, multiple suspension electrode item in each sub-pixel is each independently of the others setting or in end
It links together, forms slit between adjacent suspension electrode item.
Further, the liquid crystal molecule in the liquid crystal layer is positive liquid crystal molecules, in the initial state, the positivity liquid crystal point
Son is in lying posture and the display panel has wide viewing angle；When applying voltage signal to the viewing angle control electrode, the positivity
Liquid crystal molecule from lying posture deflect to lateral attitude and the display panel leniently view angle switch to narrow viewing angle.
Further, the liquid crystal molecule in the liquid crystal layer is negative liquid crystal molecule, in the initial state, the negative liquid crystal point
Son is in lateral attitude and the display panel has narrow viewing angle；When applying voltage signal to the viewing angle control electrode, the negativity
Liquid crystal molecule deflects to lying posture from lateral attitude and the display panel switches to wide viewing angle from narrow viewing angle.
The changeable liquid crystal display device in visual angle provided in an embodiment of the present invention is set in each sub-pixel on first substrate
There is suspension electrode, the suspension electrode in each sub-pixel is corresponding with pixel electrode, each suspension electrode item and each pixel electrode item
It is correspondingly arranged up and down.The presence of suspension electrode can reduce liquid crystal molecule in the tilting degree in vertical substrate direction to a certain extent,
The penetrance and contrast that display panel can be improved under wide viewing angle mode can reduce under narrow viewing angle mode and be applied to visual angle control
Voltage magnitude on electrode processed and narrow viewing angle peep-proof angle identical with the comparing embodiment can be maintained, have and regarded under wide viewing angle
Angle is wider, the narrower display effect of narrow viewing angle downwards angle of visibility.
Detailed description of the invention
Fig. 1 is structural schematic diagram of a kind of liquid crystal display device in wide viewing angle in the prior art.
Fig. 2 is structural schematic diagram of the liquid crystal display device in narrow viewing angle in Fig. 1.
Fig. 3 is structural schematic diagram of the liquid crystal display device in wide viewing angle in first embodiment of the invention.
Fig. 4 is structural schematic diagram of the liquid crystal display device in narrow viewing angle in Fig. 3.
Fig. 5 is the electrical block diagram of liquid crystal display device in Fig. 3.
Fig. 6 is the structural schematic diagram of the pixel electrode of liquid crystal display device in Fig. 3.
Fig. 7 a to Fig. 7 b is the structural schematic diagram of the suspension electrode in different instances of the present invention.
Fig. 8 a to Fig. 8 b is the planar structure schematic diagram of liquid crystal display device in Fig. 3.
Fig. 9 a to Fig. 9 b is the display effect schematic diagram of the embodiment of the present invention and a comparing embodiment.
Figure 10 a to Figure 10 b is the contrast schematic diagram of the embodiment of the present invention and comparing embodiment.
Figure 11 is structural schematic diagram of the liquid crystal display device in narrow viewing angle in second embodiment of the invention.
Figure 12 is structural schematic diagram of the liquid crystal display device in wide viewing angle in Figure 11.
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 in wide viewing angle in first embodiment of the invention, and Fig. 4 is in Fig. 3
Structural schematic diagram of the liquid crystal display device in narrow viewing angle, please join Fig. 3 and Fig. 4, which includes display panel 20,
The display panel 20 include first substrate 21, the second substrate 22 being oppositely arranged with first substrate 21 and be located at first substrate 21 with
Liquid crystal layer 23 between the second substrate 22.
Under normal circumstances, when screen of the user from different visual angle viewing liquid crystal display devices, the brightness of image can be with
The increase at visual angle and reduce.The liquid crystal display device of traditional twisted nematic (Twisted Nematic, TN), common electrical
Pole and pixel electrode are respectively formed on upper and lower two different substrates, and liquid crystal molecule is in a plane inward turning vertical with substrate
Turn.However, the liquid crystal molecule close to the surface location of two substrates is mutually orthogonal arrangement in TN type liquid crystal display device
, cause the visual angle of TN type liquid crystal display device narrow.To realize wide viewing angle, using the plane inner switching type of horizontal component of electric field
(In-Plane Switching, IPS) and fringe field switch type (the Fringe Field for using fringe field
Switching, FFS) liquid crystal display device be developed.For IPS type or the liquid crystal display device of FFS type, common electrical
Pole and pixel electrode are formed on same substrate (i.e. thin-film transistor array base-plate), and liquid crystal molecule is substantially parallel with substrate
Plane internal rotation to obtaining wider array of visual angle.
Liquid crystal display device provided in this embodiment is suitable for plane inner switching type (IPS), fringe field switch type (FFS)
The liquid crystal display device of isotype, public electrode and pixel electrode are both formed in same substrate (i.e. thin-film transistor array base-plate)
On, when applying the electric field of display between public electrode and pixel electrode, liquid crystal molecule is in the plane substantially parallel with substrate
Interior rotation is to obtain wider visual angle.In the present embodiment, by taking fringe field switch type (FFS) as an example to the liquid crystal display device into
Row explanation.
In the present embodiment, first substrate 21 is, for example, colored filter substrate, and the second substrate 22 is, for example, thin film transistor (TFT)
Array substrate.First substrate 21 is equipped with the first polaroid 211 in the side backwards to liquid crystal layer 23, and the second substrate 22 is backwards to liquid crystal
The side of layer 23 is equipped with the second polaroid 221, and the light transmission axis direction of the first polaroid 211 and the second polaroid 221 is mutually perpendicular to.
In the present embodiment, first substrate 21 insulate in the side towards liquid crystal layer 23 equipped with viewing angle control electrode 212, first
Layer 213 and suspension electrode 214, suspension electrode 214 and viewing angle control electrode 212 be provided separately in Different Plane, suspension electrode
It is separated between 214 and viewing angle control electrode 212 by the first insulating layer 213 and mutually insulated, the film thickness of the first insulating layer 213 can be
1.5um~3um.
Fig. 5 is the electrical block diagram of liquid crystal display device in Fig. 3, incorporated by reference to Fig. 5, in the present embodiment, and the second substrate
22 are equipped with scan line 222, data line 223, thin film transistor (TFT) (TFT) 224, public electrode 225 in the side towards liquid crystal layer 23
(common electrode), second insulating layer 226 and pixel electrode 227 (pixel electrode).Public electrode 225 with
And mutually insulated spaced apart by second insulating layer 226 between pixel electrode 227.It should be understood that, in the present embodiment, first
Film layer structure related to the present invention is only illustrated in substrate 21 and the second substrate 22, then with the incoherent film layer structure of the present invention
It is omitted.
As shown in figure 5, multi-strip scanning line 222 and multiple data lines 223 intersect, restriction forms multiple sub-pixel SP
(sub-pixel).Sub-pixel SP is, for example, red (R), green (G) or blue (B) sub-pixel, multiple adjacent sub-pixel SP structures
At a display pixel (pixel).For example, a display pixel may include red (R), green (G) and blue (B) three sub- pictures
Plain SP.Pixel electrode 227 and thin film transistor (TFT) (TFT) 224 are equipped in each sub-pixel SP, thin film transistor (TFT) 224 is located at scanning
Near the position that line 222 intersects with data line 223.Each thin film transistor (TFT) 224 includes grid, source electrode and drain electrode (not shown),
Wherein grid is electrically connected corresponding scan line 222, the corresponding data line 223 of one of source electrode and drain electrode electrical connection, source electrode with drain
The corresponding pixel electrode 227 of another electrical connection, such as source electrode is electrically connected corresponding data line 223, and drain electrode electrical connection is corresponding
Pixel electrode 227.
For simplicity, structural schematic diagram corresponding with a sub-pixel SP is illustrated only in Fig. 3 and Fig. 4.In the present embodiment,
Pixel electrode 227 is located at 225 top of public electrode, is equipped at intervals with second insulating layer 226 between the two, but not limited to this.At it
In his embodiment, pixel electrode 227 can also be located at 225 lower section of public electrode.In addition, when using plane inner switching type (IPS)
When the liquid crystal display device of mode, public electrode 225 and pixel electrode 227 may be located in same layer and mutually insulated, this
When public electrode 225 and pixel electrode 227 pectinate texture with multiple electrodes item can be respectively prepared and be mutually inserted cooperation.
ITO (indium oxide can be used in viewing angle control electrode 212, suspension electrode 214, public electrode 225 and pixel electrode 227
Tin), the electrically conducting transparents material such as IZO (indium zinc oxide) is made.Viewing angle control electrode 212 can be the whole face electricity not being patterned
Pole (such as Fig. 3).Public electrode 225 can be the whole face electrode being locally patterned, such as be formed in the second substrate 22 each
The position of TFT 224, public electrode 225 by partly etching remove, allow each pixel electrode 227 by position herein to
Lower conducting is connected to corresponding TFT 224.
Fig. 6 is the structural schematic diagram of the pixel electrode of liquid crystal display device in Fig. 3, please join 5 and Fig. 6, is located at every height picture
Pixel electrode 227 in plain SP includes the multiple pixel electrode 227a being spaced apart from each other, and multiple pixel electrode 227a is being held
Portion links together and is electrically connected with TFT 224, and slit 227b is formed between adjacent pixel electrode 227a.
Fig. 7 a to Fig. 7 b is the structural schematic diagram of the suspension electrode in different instances of the present invention, please join Fig. 7 a to Fig. 7 b, is hanged
Floating electrode 214 is arranged in each sub-pixel SP.Suspension electrode 214 in each sub-pixel SP is more including being spaced apart from each other
A suspension electrode 214a, multiple suspension electrode 214a can be each independently of the others setting (as shown in Figure 7a) or hold
Portion links together (as shown in Figure 7b), and slit 214b is formed between adjacent suspension electrode 214a.It is adjacent in the present embodiment
Suspension electrode 214 between sub-pixel SP is mutually not attached to, to be provided separately.
Please join Fig. 3, in each sub-pixel SP, each suspension electrode 214a of suspension electrode 214 respectively with pixel electrode
227 each pixel electrode 227a or more is correspondingly arranged.Preferably, each suspension electrode 214a respectively with each pixel electrode item
227a or more is perfectly aligned, but in view of the deviation of processing procedure contraposition, each suspension electrode 214a and each pixel electrode 227a it
Between align that there may also be certain deviations up and down.
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.In original state, (i.e. display panel 20 is not applied
Add the situation of any voltage) under, the lie low appearance substantially parallel with substrate 21,22 is presented in the positive liquid crystal molecules in liquid crystal layer 23
State keeps the long axis direction of positive liquid crystal molecules substantially parallel with the surface of substrate 21,22 (such as Fig. 3).Since (figure is not for alignment film
Show) anchoring effect, under the original state for not applying any voltage, positive liquid crystal molecules may remain in the display panel 20
Lying posture.In practical application, the initial of very little can have between the positive liquid crystal molecules in liquid crystal layer 23 and substrate 21,22
The range of pre-tilt angle, the initial pre-tilt angle can be within 10 °, it may be assumed that 0 θ≤10 ° ° ≦.Under electric field action, positive liquid crystal molecules
Long axis can deflect towards the trend parallel with electric field line direction.
Viewing angle control electrode 212 is for controlling view angle switch, by controlling the biasing being applied on viewing angle control electrode 212
Voltage, the liquid crystal display device can switch between wide viewing angle mode and narrow viewing angle mode." bias voltage " as described below is view
Potential difference between angle coordination electrode 212 and public electrode 225.
It please join Fig. 3, (bias voltage comprising application very little is such as when not applying bias voltage on viewing angle control electrode 212
Situation less than 0.5V) when, the tilt angle of liquid crystal molecule hardly happens variation, and liquid crystal molecule is that traditional face internal electric field drives
Flowing mode, by the face that is formed between the pixel electrode 227 and public electrode 225 that are located in same substrate (i.e. the second substrate 22)
Electric field driven liquid crystal molecule is in the plane internal rotation parallel with substrate 21,22, and liquid crystal molecule is under the effect of stronger face internal electric field
Realize wide viewing angle mode.
It please join Fig. 4, when applying the bias voltage of larger (being greater than 2V) on viewing angle control electrode 212, due to
There are potential differences between the public electrode 225 on viewing angle control electrode 212 and the second substrate 22 on one substrate 21, can be at two
Vertical electric field (as shown in arrow E in figure) is formed between substrate 21,22, since positive liquid crystal molecules will be along under electric field action
The direction for being parallel to electric field line rotates, positive liquid crystal molecules the vertical electric field effect under will deflect, make liquid crystal molecule with
Tilt angle between substrate 21,22 increases, so that on the screen strabismus direction of the display panel 20, across liquid crystal molecule
There is light leakage phenomena, causes from the display panel 20 since phase delay and upper down polaroid 211,221 mismatch in light
When strabismus side looks up screen, the contrast of screen reduces and influences viewing effect, reduces visual angle, to realize narrow viewing angle
Mode.
In the present embodiment, for the display panel 20 when being shown, the voltage exported to public electrode 225 is that direct current is public
Voltage (i.e. DC Vcom).When the display panel 20 is in wide viewing angle mode, the voltage applied on viewing angle control electrode 212 is
With the idiostatic direct current signal of public electrode 225, or to differ the such as less than direct current signal of 0.5V with public electrode 225, or
Person is around 225 fluctuating range of the public electrode such as less than AC signal of 0.5V, in this way between two substrates 21,22 hardly
It will form vertical electric field.When the display panel 20 is in narrow viewing angle mode, the voltage applied on viewing angle control electrode 212 is phase
There is the direct current signal or AC signal of higher magnitude (such as larger than 2V) for public electrode 225, thus in two substrates 21,22
Between formed and vertical electric field E and liquid crystal molecule driven to deflect, it is final to realize that narrow viewing angle is shown.In addition, the display panel 20 into
When row display, whether wide viewing angle mode or narrow viewing angle mode, always in not hanging to voltage signal on suspension electrode 214
Floating state.
Fig. 8 a to Fig. 8 b is the planar structure schematic diagram of liquid crystal display device in Fig. 3, please join Fig. 8 a to Fig. 8 b, the liquid crystal
Showing device further includes driving circuit 30 and viewing angle control key 40, and driving circuit 30 is used to apply to viewing angle control electrode 212 and use
The voltage needed for controlling view angle switch and to public electrode 225 export direct current common voltage (i.e. DC Vcom), viewing angle control is pressed
Key 40 is used to issue view angle switch request to the liquid crystal display device for user.View angle switch key 40 can be physical button
As shown in Figure 8 b, (as shown in Figure 8 a) (can also lead to for software control or application program (APP) Lai Shixian view angle switch function
Touch-control slider bar is crossed to set width visual angle).Under normal circumstances, do not apply or apply on viewing angle control electrode 212 and is smaller
Bias voltage, which is under wide viewing angle mode.Need to switch to narrow viewing angle mode when there is peep-proof demand
When, user can issue view angle switch request by operating the viewing angle control key 40, when receiving view angle switch request, drive
Dynamic circuit 30 applies the direct current or alternating voltage of higher magnitude to viewing angle control electrode 212, the visual angle control on first substrate 21
Generate potential difference between public electrode 225 on electrode 212 processed and the second substrate 22, make first substrate 21 and the second substrate 22 it
Between generate vertical electric field E, and by the vertical electric field E driving liquid crystal molecule deflection, thus realize leniently field-of-view mode switch to it is narrow
Field-of-view mode.When not needing narrow viewing angle display, user can be by operating the viewing angle control key 40 again, and revocation is applied to
Voltage on viewing angle control electrode 212 is shown to be back to wide viewing angle.Therefore, the visual angle of the embodiment of the present invention can be switched
Liquid crystal display device has stronger operating flexibility and convenience.
In the present embodiment, when realizing width view angle switch, the voltage being applied on viewing angle control electrode 212 be can be directly
Galvanic electricity pressure, or periodic alternating voltage.When the voltage being applied on viewing angle control electrode 212 is alternating voltage,
Direct current common voltage (i.e. DC Vcom) of the waveform of the alternating voltage around output to public electrode 225 fluctuates up and down.
Fig. 9 a to Fig. 9 b is the display effect schematic diagram of the embodiment of the present invention and a comparing embodiment, and wherein Fig. 9 a is to be somebody's turn to do
The display effect schematic diagram of liquid crystal display device in comparing embodiment, Fig. 9 b are the liquid crystal display device in the embodiment of the present invention
Display effect schematic diagram.In the comparing embodiment, other than being not provided with suspension electrode 214, remaining structure and the present invention are real
It is identical to apply example.
It please join Fig. 9 a, in the comparing embodiment, in wide viewing angle display, due to viewing angle control electrode 212 and public electrode
225 be same potential or potential difference very little, in the case where wide viewing angle show, can the second substrate 22 each pixel electrode 227a and
Biggish potential difference is generated between the viewing angle control electrode 212 of first substrate 21, so that each pixel electrode 227a and visual angle are controlled
There are stronger vertical electric fields between electrode 212 processed, so that liquid crystal molecule corresponding with each pixel electrode 227a can produce
Raw wide-angle deflection (as shown in the liquid crystal molecule in Fig. 9 a in dotted line frame A1), influences liquid crystal display device in the case where wide viewing angle is shown
Penetrance, wherein curve C1 be the comparing embodiment penetrance curve, with each pixel electrode 227a opposite position
The penetrance for locating (as shown in dotted line frame B1 in Fig. 9 a) is lower.
Please join Fig. 9 b, in the embodiment of the present invention, due on first substrate 21 in position corresponding with each pixel electrode 227a
Suspension electrode 214a is installed, in the case where wide viewing angle is shown, the suspension electrode 214 in each sub-pixel SP can be by the pixel of lower section
Electrode 227 couples, due to the presence of suspension electrode 214, weaken each pixel electrode 227a and viewing angle control electrode 212 it
Between original vertical electric field, to reduce the deflection angle of corresponding with each pixel electrode 227a liquid crystal molecule (such as figure
Shown in liquid crystal molecule in 9b in dotted line frame A2), so that penetrance of the embodiment of the present invention under wide viewing angle mode is improved, wherein
Curve C2 is the penetrance curve of the embodiment of the present invention, and (in such as Fig. 9 b empty at each pixel electrode 227a opposite position
Shown in wire frame B2) penetrance be significantly improved.Compared to the comparing embodiment, the embodiment of the present invention is under wide viewing angle mode
Penetrance improve 32.3% or so.
Penetrance data form in different instances of the present invention
| The embodiment of the present invention | Suspension electrode width | Suspension electrode spacing | Penetrance |
| Example one | 3um | 2um | 3.645% |
| Example two | 2.5um | 2.5um | 4.26% |
| Example three | 2um | 3um | 3.73% |
Penetrating under the wide viewing angle mode obtained in different instances of the present invention by simulated experiment is listed in table above
Rate data.In comparing embodiment, the penetrance under wide viewing angle mode is 3.22%.It is seen from the above data that of the invention
In the width of the suspension electrode 214a each example different with spacing value, penetrance is equal under wide viewing angle mode obtained
Higher than the comparing embodiment.Even if moreover, there are certain contrapositions between suspension electrode 214a and pixel electrode 227a
Deviation, penetrance of the embodiment of the present invention under wide viewing angle mode are still higher than the penetrance of the comparing embodiment.
Figure 10 a to Figure 10 b is the contrast schematic diagram of the embodiment of the present invention and comparing embodiment, and wherein Figure 10 a is this hair
Contrast schematic diagram in center in the horizontal direction under the wide viewing angle mode of bright embodiment and comparing embodiment, curve Q1 representative are compared
Embodiment center contrast curves in the horizontal direction, curve Q2 represent center contrast in the horizontal direction of the embodiment of the present invention
Curve, Figure 10 b illustrate for the center contrast under the wide viewing angle mode of the embodiment of the present invention and comparing embodiment in vertical direction
Figure, curve Q3 represent comparing embodiment in the center contrast curves of vertical direction, and curve Q4 represents the embodiment of the present invention and hanging down
Histogram to center contrast curves, it is seen that the liquid crystal display device that the embodiment of the present invention proposes, when being in wide view
When under angle mould formula, center contrast (CR) in the horizontal direction and the vertical direction is higher than the comparing embodiment, compared to
The comparing embodiment, center contrast of the embodiment of the present invention under wide viewing angle mode improve 36.25% or so, therefore can
The embodiment of the present invention has higher wide viewing angle center contrast while realizing view angle switch.
In addition, the DC voltage for applying 5V on viewing angle control electrode 212 realizes narrow viewing angle mode according to simplation verification
When, it is 30 ° which, which can achieve peep-proof angle, and it is 25 ° that the embodiment of the present invention, which can achieve peep-proof angle,.When regarding
When applying the DC voltage realization narrow viewing angle mode of 4V in angle coordination electrode 212, the embodiment of the present invention can achieve peep-proof angle
It is 30 °.I.e. the embodiment of the present invention is when applying identical voltage such as 5V on the viewing angle control electrode 212 of first substrate 21, narrow viewing angle
Peep-proof angle under mode expands 5 ° than the peep-proof angular range of the comparing embodiment, and narrow viewing angle is narrower.It is controlled when being applied to visual angle
When voltage on electrode 212 processed declines 1V, the embodiment of the present invention still can reach narrow viewing angle effect identical with the comparing embodiment,
Therefore the embodiment of the present invention can reduce the driving voltage being applied on viewing angle control electrode 212 under narrow viewing angle mode.
The liquid crystal display device that the embodiment of the present invention proposes, in being equipped with the electricity that suspends in each sub-pixel SP on first substrate 21
Pole 214, the suspension electrode 214 in each sub-pixel SP is corresponding with pixel electrode 227, makes each suspension electrode 214a and each picture
Plain electrode strip 227a or more is correspondingly arranged.The presence of suspension electrode 214 can reduce liquid crystal molecule in vertical substrate to a certain extent
Penetrance and contrast can be improved under wide viewing angle mode, and can reduce and apply under narrow viewing angle mode for the tilting degree in direction
The voltage magnitude that is added on viewing angle control electrode 212 and narrow viewing angle peep-proof angle identical with the comparing embodiment can be maintained,
It is wider with wide viewing angle mode downwards angle of visibility, the narrower display effect of narrow viewing angle mode downwards angle of visibility.The embodiment of the present invention can be freely light
Pine switching wide viewing angle and narrow viewing angle, has stronger operating flexibility and convenience, reach collect entertainment video and privacy secrecy in
The Multifunctional liquid crystal display device of one.
In order to apply bias voltage to the viewing angle control electrode 212 on first substrate 21, viewing angle control electrode 212 is on periphery
Non-display area can be conducted to the second substrate 22 from first substrate 21 by conducting resinl (not shown), provide electricity by driving circuit 30
It presses signal to the second substrate 22, then voltage signal is applied to by the second substrate 22 by conducting resinl the visual angle control of first substrate 21
On electrode 212 processed.Therefore the first insulating layer 213 could be formed with perforation (not shown) in peripheral non-display area, to expose view
Angle coordination electrode 212, consequently facilitating conducting resinl is electrically connected by the perforation and viewing angle control electrode 212.
[second embodiment]
Figure 11 is structural schematic diagram of the liquid crystal display device in narrow viewing angle in second embodiment of the invention, Figure 12 Figure 11
Structural schematic diagram of the middle liquid crystal display device in wide viewing angle please join Figure 11 and Figure 12, the present embodiment and above-mentioned first embodiment
The main distinction be, the liquid crystal layer 23 in the present embodiment use negative liquid crystal molecule.In original state (i.e. display panel 20
Do not apply the situation of any voltage) under, the negative liquid crystal molecule in liquid crystal layer 23 has biggish initial relative to substrate 21,22
Pre-tilt angle, i.e. negative liquid crystal molecule are relative to substrate 21,22 inclined postures (such as Figure 11).Make applying the electric field that voltage is formed
Under, the long axis of negative liquid crystal molecule can deflect towards the trend vertical with electric field line direction.
It please join Figure 11, not apply bias voltage on viewing angle control electrode 212 (comprising applying the bias voltage of very little such as less than
The situation of 0.5V) when, since the pre-tilt angle of liquid crystal molecule in liquid crystal layer 23 is larger, squinted in the screen of the display panel 20
On direction, there is light leakage phenomena due to phase delay and upper down polaroid 211,221 mismatch in the light across liquid crystal molecule,
When the strabismus side from the display panel 20 being caused to look up screen, the contrast of screen reduces and influences viewing effect, makes to regard
Angle reduces, to realize narrow viewing angle mode.
It please join Figure 12, when applying the bias voltage of larger (being greater than 2V) on viewing angle control electrode 212, due to
There are potential differences between the public electrode 225 on viewing angle control electrode 212 and the second substrate 22 on one substrate 21, thus two
Vertical electric field (as shown in arrow E in figure) is formed between a substrate 21,22, negative liquid crystal molecule will under vertical electric field effect
It deflects, reduces the tilt angle between liquid crystal molecule and substrate 21,22.When the inclination angle of liquid crystal molecule reduce to base
When plate 21,22 is substantially parallel, on the screen strabismus direction of the display panel 20, light leakage phenomena can be reduced accordingly, the display surface
The visual angle of plate 20 increases with it, to realize wide viewing angle mode.
That is, in the above-described first embodiment, liquid crystal layer 23 uses positive liquid crystal molecules, in the initial state, just
Property liquid crystal molecule is in lying posture and display panel 20 is wide viewing angle mode；When needing to switch to narrow viewing angle mode, at visual angle
Apply biggish voltage signal in coordination electrode 212, forms vertical electric field between two substrates 21,22 and drive positivity liquid crystal point
Son deflects to lateral attitude, and display panel 20 is made to show that switching to narrow viewing angle shows from wide viewing angle.
In the present embodiment, liquid crystal layer 23 uses negative liquid crystal molecule, in the initial state, the inclined appearance of negative liquid crystal molecule
State and display panel 20 are narrow viewing angle mode；When needing to switch to wide viewing angle mode, on viewing angle control electrode 212 apply compared with
Big voltage signal forms vertical electric field between two substrates 21,22 and negative liquid crystal molecule is driven to deflect to lying posture, makes
Display panel 20 shows that switching to wide viewing angle shows from narrow viewing angle.
In the present embodiment, in the initial state, the inclined posture of negative liquid crystal molecule and display panel 20 are narrow viewing angle mould
Formula.Under narrow viewing angle mode, since viewing angle control electrode 212 and public electrode 225 are same potential or potential difference very little,
Narrow viewing angle shows down, can the second substrate 22 each pixel electrode 227a and first substrate 21 viewing angle control electrode 212 it
Between generate biggish potential difference so that there are stronger vertical electricity between each pixel electrode 227a and viewing angle control electrode 212
, which can be such that negative liquid crystal molecule corresponding with each pixel electrode 227a deflects towards lying posture, thus
Influence narrow viewing angle effect of the liquid crystal display device under narrow viewing angle mode in the present embodiment.It is outstanding by being arranged on first substrate 21
Floating electrode 214, can be weakened original between each pixel electrode 227a and viewing angle control electrode 212 by the suspension electrode 214
Vertical electric field be lifted at narrow so that negative liquid crystal molecule corresponding with each pixel electrode 227a still keeps lateral attitude
Narrow viewing angle effect under field-of-view mode.
About the other structures of the present embodiment, above-mentioned first embodiment may refer to, details are not described herein.
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 display panel (20), which includes the first base
The second substrate (22) and be located at the first substrate (21) and the second substrate that plate (21) and the first substrate (21) are oppositely arranged
(22) liquid crystal layer (23) between, which is characterized in that the first substrate (21) is equipped with viewing angle control electrode (212) and the electricity that suspends
Pole (214), the viewing angle control electrode (212) and suspension electrode (214) mutually insulated setting, the second substrate (22) are equipped with
Public electrode (225) and pixel electrode (227), the public electrode (225) and pixel electrode (227) mutually insulated setting, should
Pixel electrode (227) is arranged in each sub-pixel (SP) and multiple pixel electrode items (227a) including being spaced apart from each other, this is outstanding
Floating electrode (214) are arranged in each sub-pixel (SP) and multiple suspension electrode items (214a) including being spaced apart from each other, each to suspend
Electrode strip (214a) is correspondingly arranged with each pixel electrode item (227a) up and down respectively, which is in not to voltage
The suspended state of signal, the viewing angle control electrode (212) are used to apply the voltage signal of control view angle switch.
2. the changeable liquid crystal display device in visual angle according to claim 1, which is characterized in that the liquid crystal display device is also
Including driving circuit (30), for applying to the viewing angle control electrode (212) for voltage signal needed for controlling view angle switch
And direct current public voltage signal is exported to the public electrode (225).
3. the changeable liquid crystal display device in visual angle according to claim 1, which is characterized in that the liquid crystal display device is also
Including viewing angle control key (40), for issuing view angle switch request to the liquid crystal display device.
4. the changeable liquid crystal display device in visual angle according to claim 3, which is characterized in that the viewing angle control key
It (30) is physical button or virtual key.
5. the changeable liquid crystal display device in visual angle according to claim 1, which is characterized in that adjacent subpixels (SP) it
Between suspension electrode (214) be mutually not attached to, to be provided separately.
6. the changeable liquid crystal display device in visual angle according to claim 1, which is characterized in that on the first substrate (21)
The first insulating layer (213) are additionally provided with, by first insulating layer between the viewing angle control electrode (212) and the suspension electrode (214)
(213) it separates.
7. the changeable liquid crystal display device in visual angle according to claim 6, which is characterized in that in the second substrate (22)
Second insulating layer (226) are additionally provided with, by the second insulating layer (226) between the public electrode (225) and the pixel electrode (227)
It separates.
8. the changeable liquid crystal display device in visual angle according to claim 1, which is characterized in that be located at each sub-pixel
(SP) multiple suspension electrode item (214a) in is each independently of the others setting or links together in end, adjacent suspension
Slit (214b) is formed between electrode strip (214a).
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, and in the initial state, which is in lying posture and the display panel
(20) there is wide viewing angle；When applying voltage signal to the viewing angle control electrode (212), the positive liquid crystal molecules are from lying posture
Deflect to lateral attitude and the display panel (20) leniently view angle switch to narrow viewing angle.
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, in the initial state, which is in lateral attitude and the display panel
(20) there is narrow viewing angle；When applying voltage signal to the viewing angle control electrode (212), the negative liquid crystal molecule is from lateral attitude
It deflects to lying posture and the display panel (20) switches to wide viewing angle from narrow viewing angle.
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| WO2018214080A1 (en) * | 2017-05-24 | 2018-11-29 | 昆山龙腾光电有限公司 | Visual angle switchable touch display panel and touch display device |
| CN107229163B (en) * | 2017-06-28 | 2019-12-20 | 昆山龙腾光电有限公司 | Liquid crystal display device with switchable wide and narrow viewing angles and driving method |
| CN107908027B (en) * | 2017-12-06 | 2022-02-15 | 昆山龙腾光电股份有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
| CN108519697B (en) * | 2018-04-19 | 2021-06-22 | 昆山龙腾光电股份有限公司 | Display panel and display device |
| CN108897151B (en) * | 2018-07-17 | 2021-06-22 | 昆山龙腾光电股份有限公司 | Liquid crystal display device with switchable viewing angle |
| 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 |
| CN111458940A (en) * | 2020-05-14 | 2020-07-28 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN111812897B (en) * | 2020-07-27 | 2022-11-04 | 昆山龙腾光电股份有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
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