CN109324449A - Liquid crystal display device and its driving method - Google Patents
Liquid crystal display device and its driving method Download PDFInfo
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- CN109324449A CN109324449A CN201811361964.3A CN201811361964A CN109324449A CN 109324449 A CN109324449 A CN 109324449A CN 201811361964 A CN201811361964 A CN 201811361964A CN 109324449 A CN109324449 A CN 109324449A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000758 substrate Substances 0.000 claims abstract description 83
- 239000012528 membrane Substances 0.000 claims abstract description 51
- 238000009413 insulation Methods 0.000 claims abstract description 26
- 239000010409 thin film Substances 0.000 claims description 20
- 238000000059 patterning Methods 0.000 claims description 18
- 230000015572 biosynthetic process Effects 0.000 claims description 16
- 239000010408 film Substances 0.000 claims description 16
- 238000005452 bending Methods 0.000 claims description 2
- 238000005530 etching Methods 0.000 claims 1
- 230000005684 electric field Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 9
- 230000000007 visual effect Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 208000004350 Strabismus Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002540 product ion scan Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000001451 molecular beam epitaxy Methods 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
-
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Geometry (AREA)
- Mathematical Physics (AREA)
Abstract
The invention discloses a kind of liquid crystal display device and driving methods, liquid crystal display device includes color membrane substrates, array substrate and the liquid crystal layer between color membrane substrates and array substrate, color membrane substrates are equipped with viewing angle control electrode, array substrate includes multiple pixel units, pixel electrode is equipped in each pixel unit, array substrate is equipped with the first public electrode, pixel electrode and the first public electrode are located at the two sides up and down of insulating layer, multiple insulation convex ridges are formed on insulating layer, the second public electrode is additionally provided in array substrate, second public electrode and pixel electrode are the pectinate texture with slit in each pixel unit, and second public electrode electrode strip and the electrode strip of pixel electrode be alternately arranged, the electrode strip of second public electrode is separately positioned on multiple insulation convex ridges, the electrode strip of second public electrode is prominent Above the electrode strip of pixel electrode, the electrode strip of the second public electrode is made to compare the electrode strip of pixel electrode closer to color membrane substrates.
Description
Technical field
The present invention relates to technical field of liquid crystal display, more particularly to a kind of liquid crystal display device and its driving method.
Background technique
Liquid crystal display (liquid crystal display, LCD) has good, small in size, light-weight, the low driving of image quality
Voltage, low-power consumption, radiationless and relatively low manufacturing cost advantage, occupy an leading position in flat display field.
With being constantly progressive for LCD technology, the visible angle of display is widened via original 120 ° or so
160 ° or more, people are while visual experience is brought at the big visual angle of enjoyment, it is also desirable to effective protection trade secret and individual privacy,
To avoid screen message leaks and caused by business loss or embarrassment.Therefore other than wide viewing angle, it is also necessary to which display can be with
Switch to narrow viewing angle.
FFS (Fringe Field Switching, fringe field switching) mode is a kind of common liquid crystal display mode.Closely
Come, industry starts to propose to apply one vertically to liquid crystal molecule using the viewing angle control electrode of the side colored filter substrate (CF)
Electric field, to realize width view angle switch.It please join Fig. 1 and Fig. 2, which includes upper substrate 11, lower substrate 12 and position
Liquid crystal layer 13 between upper substrate 11 and lower substrate 12, upper substrate 11 are equipped with viewing angle control electrode 111.As shown in Figure 1,
When wide viewing angle is shown, the viewing angle control electrode 111 on upper substrate 11 does 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, the viewing angle control electrode 111 on upper substrate 11 gives bias voltage, in liquid crystal layer 13
Liquid crystal molecule can be tilted because of vertical direction electric field E1, E2, E3 (as shown by the arrows in Figure 2), liquid crystal display device because of
Light leakage and contrast reduce, final to realize that narrow viewing angle is shown.
But when actually narrow viewing angle is shown, electric field E1 and electric field E2 have different and (cause this species diversity
Reason has very much, for example, public electrode 121 is covered by 122 whole face of insulating layer, makes public electrode 121 and viewing angle control electrode 111
Between the electric field E1 that is formed it is weaker), the electric field E3 for causing 123 edge of pixel electrode to be formed not is perpendicular to 11 He of upper substrate
Lower substrate 12, but an inclined electric field, inclined electric field has certain component in the horizontal direction, so pixel electrode
Deflection in horizontal direction can occur for the liquid crystal molecule of 123 edges, cause narrow viewing angle dark-state light leakage, at this time liquid crystal display device
When dark-state, the penetrance of light increases, and reduces contrast.
Summary of the invention
In order to overcome shortcoming and defect existing in the prior art, the purpose of the present invention is to provide a kind of liquid crystal display dresses
It sets and its driving method, to solve the problems, such as narrow viewing angle dark-state light leakage and contrast reduces.
The purpose of the invention is achieved by the following technical solution:
The present invention provides a kind of liquid crystal display device, including color membrane substrates, the array base being oppositely arranged with the color membrane substrates
Plate and the liquid crystal layer between the color membrane substrates and the array substrate, the color membrane substrates are equipped with for controlling width visual angle
The viewing angle control electrode of switching, the array substrate include intersecting to limit with multiple data lines mutually insulated by multi-strip scanning line to be formed
Multiple pixel units, be equipped with pixel electrode in each pixel unit, which is equipped with the first public electrode, the picture
Plain electrode is located at different layers with first public electrode and is dielectrically separated from by insulating layer, the pixel electrode and first common electrical
Pole is located at the two sides up and down of the insulating layer, and multiple insulation convex ridges are formed on the insulating layer, are additionally provided in the array substrate
Second public electrode, second public electrode and the pixel electrode are the pectination knot with slit in each pixel unit
Structure, and the electrode strip of the electrode strip of second public electrode and the pixel electrode is alternately arranged, the electrode of second public electrode
Item is separately positioned on multiple insulation convex ridges, and the electrode strip of second public electrode protrudes from the electrode strip of the pixel electrode
Side makes the electrode strip of second public electrode compare the electrode strip of the pixel electrode closer to the color membrane substrates.
Further, the electrode strip of the pixel electrode, the electrode strip of second public electrode and multiple insulation convex ridges
Shape is identical and is "<" shape or ">" shape.
Further, the electrode strip of second public electrode is disconnected in the bending part of "<" shape or ">" shape structure.
Further, the insulating layer and multiple insulation convex ridges pass through etch patterning formation by a layer insulating film,
Wherein the top half of the insulating layer of thin-film forms multiple insulation convex ridges, the lower half of the insulating layer of thin-film by etch patterning
Part is not etched and forms the insulating layer, which is whole face structure.
Further, which is formed by entire first membrane of conducting layer, the pixel electrode and this second
Public electrode passes through etch patterning formation by the second membrane of conducting layer.
Further, which is formed by entire first insulating layer of thin-film, and multiple insulation convex ridges are by the second insulation
Layer film passes through etch patterning formation.
Further, which is formed by entire first membrane of conducting layer, which is led by second
Electric layer film passes through etch patterning formation, which passes through etch patterning formation by third membrane of conducting layer.
The present invention also provides a kind of driving method of liquid crystal display device, the driving method is for driving liquid as described above
Crystal device, the driving method include:
Under the first field-of-view mode, apply direct current common electrical to first public electrode and second public electrode
Pressure applies first voltage to the viewing angle control electrode, makes the voltage difference between the viewing angle control electrode and first public electrode
And the voltage difference between the viewing angle control electrode and second public electrode is respectively less than preset value；
Under second of field-of-view mode, apply direct current common electrical to first public electrode and second public electrode
Pressure applies second voltage to the viewing angle control electrode, makes the voltage difference between the viewing angle control electrode and first public electrode
And the voltage difference between the viewing angle control electrode and second public electrode is all larger than preset value.
Further, under the first field-of-view mode, the current potential phase of the current potential of the first voltage and the direct current common voltage
Together；Under second of field-of-view mode, which is the alternating voltage relative to below-center offset in the direct current common voltage.
Further, which uses positive liquid crystal molecules, which is wide viewing angle mode, this second
Kind field-of-view mode is narrow viewing angle mode；Alternatively, the liquid crystal layer uses negative liquid crystal molecule, which is narrow viewing angle
Mode, second of field-of-view mode are wide viewing angle mode.
The beneficial effects of the invention are that: by the way that multiple insulation convex ridges have been formed on the insulating layer, and set in array substrate
There is the second public electrode, the second public electrode and pixel electrode are the pectinate texture with slit in each pixel unit,
And second public electrode electrode strip and the electrode strip of pixel electrode be alternately arranged, the electrode strip of the second public electrode is respectively set
On multiple insulation convex ridges, the electrode strip of the second public electrode is protruded from above the electrode strip of pixel electrode, makes the second common electrical
The electrode strip of pole compares the electrode strip of pixel electrode closer to color membrane substrates.Make liquid crystal display device in narrow viewing angle display, it is color
More uniform vertical electric field is formed between ilm substrate and array substrate, prevents narrow viewing angle dark-state light leakage, promotes contrast and is increased
The display image quality of strong liquid crystal display device.
Detailed description of the invention
Fig. 1 is cross section structure schematic diagram of the liquid crystal display device in wide viewing angle in the prior art；
Fig. 2 is cross section structure schematic diagram of the liquid crystal display device in narrow viewing angle in the prior art；
Fig. 3 is the planar structure schematic diagram of single pixel unit in the embodiment of the present invention one；
Fig. 4 is cross section structure signal of the liquid crystal display device in wide viewing angle along Fig. 3 at A-A in the embodiment of the present invention one
Figure；
Fig. 5 is cross section structure signal of the liquid crystal display device in narrow viewing angle along Fig. 3 at A-A in the embodiment of the present invention one
Figure；
Fig. 6 a-6f is the flow chart that array substrate manufactures in the embodiment of the present invention one；
Fig. 7 is in the present invention for driving the waveform diagram of the driving voltage of liquid crystal display device；
Fig. 8 is the planar structure schematic diagram of single pixel unit in the embodiment of the present invention two；
Fig. 9 is the planar structure schematic diagram of single pixel unit in the embodiment of the present invention three；
Figure 10 is that cross section structure of the liquid crystal display device in wide viewing angle along Fig. 8 at B-B shows in the embodiment of the present invention two
It is intended to；
Figure 11 is that cross section structure of the liquid crystal display device in narrow viewing angle along Fig. 8 at B-B shows in the embodiment of the present invention two
It is intended to；
Figure 12 a-12i is the flow chart that array substrate manufactures in the embodiment of the present invention two；
Figure 13 is that liquid crystal display device is shown using cross section structure of the negative liquid crystal in narrow viewing angle in the embodiment of the present invention four
It is intended to；
Figure 14 is that liquid crystal display device is shown using cross section structure of the negative liquid crystal in wide viewing angle in the embodiment of the present invention four
It is intended to；
Figure 15 is one of the planar structure schematic diagram of liquid crystal display device in the present invention；
Figure 16 is two of the planar structure schematic diagram of liquid crystal display device in the present invention.
Specific embodiment
It is of the invention to reach the technical means and efficacy that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Attached drawing and preferred embodiment, specific embodiment, knot to liquid crystal display device proposed according to the present invention and its driving method
Structure, feature and its effect, detailed description are as follows:
[embodiment one]
As shown in Figures 3 to 5, the liquid crystal display device that the embodiment of the present invention one provides, including color membrane substrates 20 and color film
The array substrate 30 that substrate 20 is oppositely arranged and the liquid crystal layer 40 between color membrane substrates 20 and array substrate 30.Wherein liquid
Crystal layer 40 uses positive liquid crystal molecules (liquid crystal molecule that dielectric anisotropy is positive), the positive liquid crystal molecules in liquid crystal layer 40 with
Can have lesser initial pre-tilt angle between color membrane substrates 20 and array substrate 30, the range of initial pre-tilt angle may be less than or
Equal to 10 degree, it may be assumed that 0 θ≤10 ° ° ≦, to reduce the response time of positive liquid crystal molecules vertical deflection.
Color blocking layer 22, black matrix (BM) 21,23 and of flatness layer are equipped in the side towards liquid crystal layer 30 on color membrane substrates 20
For controlling the viewing angle control electrode 24 of width view angle switch.Color blocking layer 22 is for example including red (R), green (G), blue (B) three color
Color blocking material respectively corresponds the pixel unit P to form three color of red, green, blue.Black matrix 21 is located at the pixel list of three color of red, green, blue
Between first P, make to be spaced from each other between adjacent pixel unit P by black matrix 21.
In array substrate 30 the side towards liquid crystal layer 30 be equipped with mutually insulated intersect multi-strip scanning line 31 with it is a plurality of
Data line 32, is intersected to limit and forms multiple pixel unit P by multi-strip scanning line 31 with multiple data lines 32, each pixel unit P
Interior to be equipped with pixel electrode 37 and thin film transistor (TFT) 33, thin film transistor (TFT) 33 is swept pixel electrode 37 is corresponding with pixel electrode 37
It retouches line 31 and data line 32 connects.Be additionally provided in array substrate 30 whole face covering the first public electrode 35, pixel electrode 37 with
First public electrode 35 is located at different layers and is dielectrically separated from by insulating layer 36, and pixel electrode 37 is located at the upside of insulating layer 36,
First public electrode 35 is located at the downside of insulating layer 36.Multiple insulation convex ridges 361 are formed on insulating layer 36.In array substrate 30
It is additionally provided with the second public electrode 38, the second public electrode 38 and pixel electrode 37 are with slit in each pixel unit P
Pectinate texture, and the electrode strip of the second public electrode 38 and the electrode strip of pixel electrode 37 are alternately arranged, the second public electrode
38 electrode strip is separately positioned on multiple insulation convex ridges 361, and the electrode strip of the second public electrode 38 protrudes from pixel electrode 37
Electrode strip above, so that the electrode strip of the second public electrode 38 is compared the electrode strip of pixel electrode 37 closer to color membrane substrates 20.
In the present embodiment, array substrate 30 and color membrane substrates 20 can use the materials such as glass, acrylic acid and polycarbonate
It is made.First public electrode 35, the second public electrode 38, pixel electrode 37 and viewing angle control electrode 24 can use tin indium oxide
(ITO), the transparent conductive materials such as indium zinc oxide (IZO) are made.
Further, the electrode strip and multiple insulation convex ridges 361 of the electrode strip of pixel electrode 37, second public electrode 38
Shape is identical and is "<" shape or ">" shape, in the present embodiment, the electrode of the electrode strip of pixel electrode 37, the second public electrode 38
Item is identical with the shape of multiple insulation convex ridges 361 and is " < " shape.
In the present embodiment, multiple metals can also be respectively set on the first public electrode 35 and the second public electrode 38
Electrode (such as being arranged in 21 occlusion area of black matrix), to reduce the resistance of the first public electrode 35 and the second public electrode 38.
The first public electrode 35 and the second public electrode 38 can be made to be connected to one by punching on the insulating layer 36 of non-display area
It rises, and applies identical common signal.
In the present embodiment, insulating layer 36 and multiple insulation convex ridges 361 are passed through etch patterning by a layer insulating film J
It is formed, wherein the top half of insulating layer of thin-film J forms multiple insulation convex ridges 361 by etch patterning, insulating layer of thin-film J's
Lower half portion is not etched and forms insulating layer 36, and insulating layer 36 is whole face structure；
Further, the first public electrode 35 is formed by entire first membrane of conducting layer T1, pixel electrode 37 and second
Public electrode 38 passes through etch patterning formation by the second membrane of conducting layer T2.Specifically:
As shown in Figure 6 a, flatness layer is covered on the substrate that production has scan line 31, data line 32 and thin film transistor (TFT) 33
34.The step of as production scan line 31, data line 32 and thin film transistor (TFT) 33, refer to the prior art, and which is not described herein again；
As shown in Figure 6 b, entire first membrane of conducting layer T1 is deposited in flatness layer 34 and form the first public electrode 35；
As described relative to figs. 6c and 6d, a layer insulating film J is covered on the first public electrode 35, uses the first mask pair
Insulating layer of thin-film J is once etched and is made patterned process, and wherein the top half of insulating layer of thin-film J is by etch patterning
Multiple insulation convex ridges 361 are formed, the lower half portion of insulating layer of thin-film J is not etched and forms insulating layer 36, and insulating layer 36 is whole
Face structure.
As shown in Fig. 6 e and Fig. 6 f, the deposit second conductive layer film T2 on insulating layer 36 and multiple insulation convex ridges 361 makes
Patterned process is once etched and made to the second membrane of conducting layer T2 with the second mask, forms pixel electrode 37 and second
Public electrode 38, wherein the electrode strip of the second public electrode 38 is respectively on multiple insulation convex ridges 361.
The present embodiment also provides a kind of driving method of liquid crystal display device, and the driving method is as described above for driving
Liquid crystal display device is switched over, the driving side with realizing liquid crystal display device between wide viewing angle mode and narrow viewing angle mode
Method includes:
As shown in fig. 7, the first public electrode 35 and the second public electrode under wide viewing angle mode, in array substrate 30
38 apply direct current common voltage Vcom, and the viewing angle control electrode 24 on color membrane substrates 20 applies first voltage V1, make visual angle
Between voltage difference and viewing angle control electrode 24 and the second public electrode 38 between coordination electrode 24 and the first public electrode 35
Voltage difference be respectively less than preset value (being, for example, less than 0.5V), in the present embodiment, the current potential of first voltage V1 and direct current common voltage
The current potential of Vcom is identical；
At this point, due to voltage difference and viewing angle control electrode 24 between viewing angle control electrode 24 and the first public electrode 35
Voltage difference between the second public electrode 38 is smaller, and the tilt angle of positive liquid crystal molecules hardly happens in liquid crystal layer 40
Variation is maintained as lying posture, therefore liquid crystal display device is that normal wide viewing angle is shown, as shown in Figure 4.
Under narrow viewing angle mode, the first public electrode 35 and the second public electrode 38 in array substrate 30 apply directly
Common voltage Vcom is flowed, the viewing angle control electrode 24 on color membrane substrates 20 applies second voltage V2, makes viewing angle control electrode 24
The voltage difference between voltage difference and viewing angle control electrode 24 and the second public electrode 38 between the first public electrode 35 is equal
Greater than preset value (being greater than 3V), in the present embodiment, second voltage V2 is relative to below-center offset on direct current common voltage Vcom
Alternating voltage；
At this point, due to voltage difference and viewing angle control electrode 24 between viewing angle control electrode 24 and the first public electrode 35
Voltage difference between the second public electrode 38 is larger, can generate between array substrate 30 and color membrane substrates 20 stronger vertical
Electric field E (as shown by the arrows in Figure 5), since positive liquid crystal molecules will revolve under electric field action along the direction for being parallel to electric field line
Turn, therefore positive liquid crystal molecules will deflect under vertical electric field E effect, make positive liquid crystal molecules and array substrate 30 and coloured silk
Tilt angle between ilm substrate 20 increases and tilts, and positive liquid crystal molecules are transformed to lateral attitude from lying posture, make liquid crystal
There is wide-angle observation light leakage in display device, reduces in strabismus Direction Contrast and visual angle narrows, liquid crystal display device is finally real
Now narrow viewing angle is shown, as shown in Figure 5.
The liquid crystal display device of this framework can guarantee that the electric field between array substrate 30 and color membrane substrates 20 keeps vertical
It state and is uniformly distributed, light leakage occurs when narrow viewing angle dark-state to reduce liquid crystal display device, promotes liquid crystal display device
Contrast and enhance display image quality.
The following are the emulation tables of the present invention and the liquid crystal display device of the prior art:
In above-mentioned table 1, when narrow viewing angle dark-state, the transmitance of light is 0.033% in the prior art, in the present invention
The transmitance of light is 0.007%, and the transmitance of light reduces by 79%, i.e. brightness is darker；It is existing when narrow viewing angle illuminated state
The transmitance of light is 1.400% in technology, and the transmitance of light is 1.560% in the present invention, and the transmitance of light increases
11%, i.e. brightness is brighter；When narrow viewing angle display, contrast improves 424%.It can be seen that, liquid crystal display of the invention
Device effectively prevents the light leakage in narrow viewing angle dark-state, greatly improves the contrast of liquid crystal display device and enhances display
Image quality；
In above-mentioned table 2, when wide viewing angle dark-state, the transmitance of light is 0.003% in the prior art, in the present invention
The transmitance of light is 0.00304%, and the transmitance of light increases by 1.3%, i.e. brightness is brighter；When wide viewing angle illuminated state,
The transmitance of light is 2.886% in the prior art, and the transmitance of light is 2.993% in the present invention, and the transmitance of light increases
Add 3.7%, i.e. brightness is brighter；When wide viewing angle display, contrast improves 2.4%.It can be seen that, liquid crystal of the invention
Showing device also effectively improves the contrast under wide viewing angle mode and enhances display image quality.
[embodiment two]
As shown in Fig. 8, Figure 10 and Figure 11, liquid crystal display device provided by Embodiment 2 of the present invention and embodiment one (Fig. 3,
Fig. 4 and Fig. 5) in liquid crystal display device it is essentially identical, the difference is that:
In the present embodiment, insulating layer 36 is formed by entire first insulating layer of thin-film J1, and multiple insulation convex ridges 361 are by
Two insulating layer of thin-film J2 pass through etch patterning formation.
Further, the first public electrode 35 is formed by entire first membrane of conducting layer T1, and pixel electrode 37 is by second
Membrane of conducting layer T2 passes through etch patterning formation, and the second public electrode 38 is by third membrane of conducting layer T3 by etch patterning
It is formed.Specifically:
As figure 12 a shows, flatness layer is covered on the substrate that production has scan line 31, data line 32 and thin film transistor (TFT) 33
34.The step of as production scan line 31, data line 32 and thin film transistor (TFT) 33, refer to the prior art, and which is not described herein again；
As shown in Figure 12b, entire first membrane of conducting layer T1 is deposited in flatness layer 34 and form the first public electrode 35；
As shown in fig. 12 c, the first insulating layer of thin-film J1 is covered on the first public electrode 35 and forms entire insulating layer
36；
As shown in Figure 12 d and Figure 12 e, the deposit second conductive layer film T2 on insulating layer 36 uses the first mask pair
Second membrane of conducting layer T2 is once etched and is made patterned process, forms the pixel electrode 37 with slit；
As shown in Figure 12 f to Figure 12 h, second insulating layer film J2 is covered in insulating layer 36 and pixel electrode 37, and the
Two insulating layer of thin-film J2 depositing third conductive film T3, once lose third membrane of conducting layer T3 using the second mask
Patterned process is carved and made, second public electrode 38 with slit, electrode strip and the pixel electricity of the second public electrode 38 are formed
The electrode strip of pole 37 is alternately distributed；
It is then thin to second insulating layer to block using third mask or with the second public electrode 38 as shown in Figure 12 i
Film J2 is once etched and is made patterned process, is etched away other regions except the covering of the second public electrode 38 and is formed multiple
Insulate convex ridge 361.
Those skilled in the art it should be understood that remaining structure and working principle of the present embodiment and embodiment
One is identical, and which is not described herein again.
[embodiment three]
As shown in figure 9, the liquid crystal display in liquid crystal display device and embodiment two (Fig. 8) that the embodiment of the present invention three provides
Device is essentially identical, the difference is that, in the present embodiment, the electrode strip of the second public electrode 38 is in the curved of " < " shape structure
Folding part disjunction is opened, and the second public electrode 38 is made to be divided into two parts up and down in pixel unit P.
Those skilled in the art it should be understood that remaining structure and working principle of the present embodiment and embodiment
Two is identical, and which is not described herein again.
[example IV]
As shown in Figure 13 and Figure 14, liquid crystal display device and embodiment one (Fig. 4 and Fig. 5) that the embodiment of the present invention four provides
In liquid crystal display device it is essentially identical, the difference is that, in the present embodiment, liquid crystal layer 40 use negative liquid crystal molecule
(liquid crystal molecule that dielectric anisotropy is negative).With technological progress, the performance of negative liquid crystal is significantly improved, using also getting over
Hair is extensive.In the present embodiment, as shown in figure 13, in original state (the i.e. liquid crystal display device situation that does not apply any voltage
Under), the negative liquid crystal molecule in liquid crystal layer 40 has biggish initial pre-tilt angle relative to array substrate 30 and color membrane substrates 20,
I.e. negative liquid crystal molecule is in original state relative to array substrate 30 and the inclined posture of color membrane substrates 20.
Specifically, Fig. 7 is please referred to, the first public electrode 35 and second under narrow viewing angle mode, in array substrate 30
Public electrode 38 applies direct current common voltage Vcom, and the viewing angle control electrode 24 on color membrane substrates 20 applies first voltage
V1 makes voltage difference between viewing angle control electrode 24 and the first public electrode 35 and viewing angle control electrode 24 and the second common electrical
Voltage difference between pole 38 is respectively less than preset value (being, for example, less than 0.5V), in the present embodiment, the current potential and direct current of first voltage V1
The current potential of common voltage Vcom is identical；
At this point, due to voltage difference and viewing angle control electrode 24 between viewing angle control electrode 24 and the first public electrode 35
Voltage difference between the second public electrode 38 is smaller, and the tilt angle of positive liquid crystal molecules hardly happens in liquid crystal layer 40
Variation appoints right inclined posture relative to array substrate 30 and color membrane substrates 20, liquid crystal display device is made wide-angle observation occur
Light leakage reduces in strabismus Direction Contrast and visual angle narrows, and liquid crystal display device is that normal narrow viewing angle is shown, such as Figure 13 institute
Show.
Under wide viewing angle mode, the first public electrode 35 and the second public electrode 38 in array substrate 30 apply directly
Common voltage Vcom is flowed, the viewing angle control electrode 24 on color membrane substrates 20 applies second voltage V2, makes viewing angle control electrode 24
The voltage difference between voltage difference and viewing angle control electrode 24 and the second public electrode 38 between the first public electrode 35 is equal
Greater than preset value (being greater than 3V), in the present embodiment, second voltage V2 is relative to below-center offset on direct current common voltage Vcom
Alternating voltage；
At this point, due to voltage difference and viewing angle control electrode 24 between viewing angle control electrode 24 and the first public electrode 35
Voltage difference between the second public electrode 38 is larger, can generate between array substrate 30 and color membrane substrates 20 stronger vertical
Electric field E (as shown in arrow in Figure 14), since negative liquid crystal molecule will be along the direction perpendicular to electric field line under electric field action
Rotation, therefore negative liquid crystal molecule will deflect under vertical electric field E effect, make negative liquid crystal molecule and array substrate 30 and
Tilt angle between color membrane substrates 20 reduces, and negative liquid crystal molecule is transformed to lying posture, therefore liquid crystal from lateral attitude
Showing device finally realizes that wide viewing angle is shown, as shown in figure 14.
Those skilled in the art it should be understood that remaining structure and working principle of the present embodiment and embodiment
One is identical, and which is not described herein again.
Figure 15 and Figure 16 is the planar structure schematic diagram of liquid crystal display device in the present invention, please join Figure 15 and Figure 16, the liquid
Crystal device is equipped with view angle switch key 50, for issuing view angle switch request to the liquid crystal display device for user.Visual angle
Switching key 50 can be physical button (as shown in figure 15), or software control or application program (APP) are realized
Handoff functionality (width visual angle as shown in figure 16, is set by slider bar).When user needs between wide viewing angle and narrow viewing angle
When switching, view angle switch request can be issued to the liquid crystal display device by operation view angle switch key 50, finally by driving
Chip 60 controls the voltage that is applied on viewing angle control electrode 24, with control viewing angle control electrode 24 and the first public electrode 35 it
Between voltage difference and viewing angle control electrode 24 and the second public electrode 38 between voltage difference, which can
Realize the switching between wide viewing angle and narrow viewing angle, when being switched to wide viewing angle, driving method uses the corresponding driving of wide angle mode
Method, when being switched to narrow viewing angle, driving method uses narrow viewing angle mode corresponding driving method, therefore the embodiment of the present invention
Liquid crystal display device has stronger operating flexibility and convenience, reaches the more function for integrating entertainment video and privacy secrecy
It can liquid crystal display device.
Term " formation " mentioned in the present invention and " production " should include broadly understanding, such as can use object
The mode commonly used in the art such as physical vapor deposition, chemical vapor deposition, molecular beam epitaxy carries out.Since these form the side of film
There are many kinds of formulas, therefore no longer specifically notes to form the process of every kind of film herein, because these methods are not this
Where the inventive point of invention.
In the present invention, the nouns of locality such as related up, down, left, right, before and after are located in figure with the structure in attached drawing
And structure mutual position defines, only for the purpose of expressing the technical solution clearly and conveniently.It should be appreciated that described
The use of the noun of locality should not limit the claimed range of the application.
The above described is only a preferred embodiment of the present invention, restriction in any form not is done to the present invention, 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, fall within the scope of protection of the technical scheme of the present invention
Within.
Claims (10)
1. a kind of liquid crystal display device, including color membrane substrates (20), the array substrate being oppositely arranged with the color membrane substrates (20)
(30) and the liquid crystal layer (40) between the color membrane substrates (20) and the array substrate (30) it, is set on the color membrane substrates (20)
Have the viewing angle control electrode (24) for controlling width view angle switch, the array substrate (30) include by multi-strip scanning line (31) with
Multiple data lines (32) mutually insulated intersects the multiple pixel units (P) for limiting and being formed, and is equipped with picture in each pixel unit (P)
Plain electrode (37), the array substrate (30) are equipped with the first public electrode (35), the pixel electrode (37) and first common electrical
Pole (35) is located at different layers and is dielectrically separated from by insulating layer (36), the pixel electrode (37) and first public electrode (35) point
Not Wei Yu the insulating layer (36) two sides up and down, which is characterized in that be formed with multiple insulation convex ridges on the insulating layer (36)
(361), the second public electrode (38) are additionally provided in the array substrate (30), second public electrode (38) and the pixel electrode
It (37) is the pectinate texture with slit in each pixel unit (P), and the electrode strip of second public electrode (38)
Be alternately arranged with the electrode strip of the pixel electrode (37), the electrode strip of second public electrode (38) be separately positioned on it is multiple this absolutely
On edge convex ridge (361), the electrode strip of second public electrode (38) is protruded from above the electrode strip of the pixel electrode (37), makes this
The electrode strip of second public electrode (38) compares the electrode strip of the pixel electrode (37) closer to the color membrane substrates (20).
2. liquid crystal display device according to claim 1, which is characterized in that the electrode strip of the pixel electrode (37), this
The electrode strip of two public electrodes (38) is identical with the shape of multiple insulation convex ridges (361) and is "<" shape or ">" shape.
3. liquid crystal display device according to claim 2, which is characterized in that the electrode strip of second public electrode (38) exists
The bending part of "<" shape or ">" shape structure disconnects.
4. liquid crystal display device according to claim 1, which is characterized in that the insulating layer (36) and multiple insulation convex ridges
(361) etch patterning formation is passed through by a layer insulating film (J), wherein the top half of the insulating layer of thin-film (J) is passed through
Etch patterning to form multiple insulation convex ridges (361), the lower half portion of the insulating layer of thin-film (J) is not etched and forms this absolutely
Edge layer (36), the insulating layer (36) are whole face structure.
5. liquid crystal display device according to claim 4, which is characterized in that first public electrode (35) is by entire
One membrane of conducting layer (T1) formation, the pixel electrode (37) and second public electrode (38) are passed through by the second membrane of conducting layer (T2)
Over etching patterns to be formed.
6. liquid crystal display device according to claim 1, which is characterized in that the insulating layer (36) is insulated by entire first
Layer film (J1) formation, multiple insulation convex ridges (361) pass through etch patterning formation by second insulating layer film (J2).
7. liquid crystal display device according to claim 6, which is characterized in that first public electrode (35) is by entire
One membrane of conducting layer (T1) formation, the pixel electrode (37) pass through etch patterning formation by the second membrane of conducting layer (T2), should
Second public electrode (38) passes through etch patterning formation by third membrane of conducting layer (T3).
8. a kind of driving method of liquid crystal display device, which is characterized in that the driving method is for driving such as claim 1 to 7
Described in any item liquid crystal display devices, the driving method include:
Under the first field-of-view mode, it is public to apply direct current to first public electrode (35) and second public electrode (38)
Voltage (Vcom), to the viewing angle control electrode (24) apply first voltage (V1), make the viewing angle control electrode (24) and this first
The voltage between voltage difference and the viewing angle control electrode (24) and second public electrode (38) between public electrode (35)
Difference is respectively less than preset value；
Under second of field-of-view mode, it is public to apply direct current to first public electrode (35) and second public electrode (38)
Voltage (Vcom), to the viewing angle control electrode (24) apply second voltage (V2), make the viewing angle control electrode (24) and this first
The voltage between voltage difference and the viewing angle control electrode (24) and second public electrode (38) between public electrode (35)
Difference is all larger than preset value.
9. the driving method of liquid crystal display device according to claim 8, which is characterized in that in the first field-of-view mode
Under, the current potential of the first voltage (V1) is identical as the current potential of the direct current common voltage (Vcom)；It, should under second of field-of-view mode
Second voltage (V2) is the alternating voltage relative to below-center offset in the direct current common voltage (Vcom).
10. the driving method of liquid crystal display device according to claim 8, which is characterized in that the liquid crystal layer (40) uses
Positive liquid crystal molecules, the first field-of-view mode are wide viewing angle mode, which is narrow viewing angle mode；Alternatively,
The liquid crystal layer (40) uses negative liquid crystal molecule, which is narrow viewing angle mode, which is
Wide viewing angle mode.
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