CN104155808B - Liquid crystal display device capable of achieving visual angle switching - Google Patents
Liquid crystal display device capable of achieving visual angle switching Download PDFInfo
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- CN104155808B CN104155808B CN201410424259.9A CN201410424259A CN104155808B CN 104155808 B CN104155808 B CN 104155808B CN 201410424259 A CN201410424259 A CN 201410424259A CN 104155808 B CN104155808 B CN 104155808B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 235
- 230000000007 visual effect Effects 0.000 title abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 109
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- 230000005684 electric field Effects 0.000 claims description 14
- 239000010408 film Substances 0.000 description 23
- 238000010586 diagram Methods 0.000 description 22
- 230000000694 effects Effects 0.000 description 15
- 238000004088 simulation Methods 0.000 description 11
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- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
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- 108010009491 Lysosomal-Associated Membrane Protein 2 Proteins 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
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- 210000001624 hip Anatomy 0.000 description 1
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- 235000009566 rice Nutrition 0.000 description 1
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Abstract
The invention provides a liquid crystal display device capable of achieving visual angle switching. The liquid crystal display device comprises a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer located between the first substrate and the second substrate, wherein liquid crystal molecules in the liquid crystal layer are negative liquid crystal molecules, a pixel electrode and a common electrode are arranged on the second substrate, a first electrode is arranged on the surface, facing towards the liquid crystal layer, of the first substrate, the range of the initial pretilt angles of the liquid crystal molecules, adjacent to the first substrate, of the liquid crystal layer is larger than or equal to 30 degrees or smaller than 90 degrees, and the liquid crystal molecules, adjacent to the second substrate, of the liquid crystal layer are in homogeneous alignment. According to the liquid crystal display device capable of achieving visual angle switching, the purpose of switching between a wide visual angle and a narrow visual angle can be achieved without increasing the thickness of a liquid crystal display and the cost of a backlight device.
Description
Technical field
The present invention relates to liquid crystal indicator, more particularly to a kind of liquid crystal that can realize wide viewing angle and narrow viewing angle switching
Showing device.
Background technology
Due to liquid crystal indicator have frivolous, energy-conservation, it is radiationless many advantages, such as, be widely used in TV, personal electricity
In the electronic equipments such as brain, panel computer, personal digital assistant (PDA), mobile phone, digital camera.At present wide viewing angle belongs to liquid crystal
The mainstream development direction of showing device, people watch from different directions the screen of wide viewing angle liquid crystal display device can have been seen
Whole and distortionless picture.But, when individual privacy and important information is related to, the display device of wide viewing angle is in some occasions
Under use also can make people feel inconvenience.
Such as, on the one hand, portable for wide viewing angles such as notebook computer, personal digital assistant, panel computer, mobile phones
Electronic equipment, people can whenever and wherever possible be called according to this, receive and send messages, surf the Net, be processed the affairs such as file, either
With the related affairs of daily life still work on affairs, get up very convenient using these portable electronic device processes,
Also, can be appreciating film, share photos etc. together with other people.However, on the other hand, due to the portable electric of wide viewing angle
Sub- equipment can in public or open space is used, using wide viewing angle portable electronic device processes affairs when it is difficult
To ensure the privacy of user, such as, when waiting car AT STATION, the people at user side and rear very likely gets a glimpse of user
Wide viewing angle portable electric appts screen on content.
Therefore, in addition to the demand of wide viewing angle, under the occasion for needing peep-proof, display can be switched or is adjusted
Display to narrow viewing angle pattern also gradually grows up.At present, mainly there is two ways that the wide viewing angle of display is regarded with narrow
Angle switches over：The first is realized by blinds Protective film, when needing to carry out peep-proof, using blinds Protective film screen is covered
Curtain can reduce visual angle, but this mode needs additionally to prepare blinds Protective film, and needs user to carry with, to using
Person causes great inconvenience；Second is to arrange double light source back light systems in a liquid crystal display to be used for adjustable liquid crystal display display
Visual angle.This pair of light source back light system is made up of the light guide plate of two-layer laminate with reference to anti-prismatic lens, and top layer light guide plate (LGP-T) is combined
Anti- prismatic lens changes the trend of light and causes light to be limited in narrow angular range, realizes the narrow viewing angle of liquid crystal display,
And bottom light guide plate (LGP-B) then realizes the wide viewing angle of liquid crystal display with reference to the function of anti-prismatic lens.But, this kind of pair of light source
Back light system can cause the thickness and cost of liquid crystal display to increase, and not meet the lightening development trend of liquid crystal display.
The content of the invention
The purpose of the present invention includes providing a kind of liquid crystal indicator, without using Protective film and not increase liquid crystal
The purpose of wide viewing angle and narrow viewing angle switching is realized under conditions of the thickness and back lighting device cost that show device.
Specifically, the embodiment of the present invention provides a kind of liquid crystal indicator of achievable view angle switch, the liquid crystal display dress
Put the second substrate that is oppositely arranged including first substrate and the first substrate and positioned at the first substrate and the second substrate it
Between liquid crystal layer.Liquid crystal molecule in the liquid crystal layer is negative liquid crystal molecule.Pixel electrode and public affairs are provided with the second substrate
Common electrode, the first substrate is provided with first electrode towards on the surface of the liquid crystal layer.The liquid crystal layer is adjacent to the first substrate
The scope of the initial tilt angle of liquid crystal molecule is that, more than or equal to 30 degree and less than 90 degree, the liquid crystal layer is adjacent to the second substrate
Liquid crystal molecule is horizontal direction matching.
Preferably, the first electrode be transparency electrode, when the first electrode be provided bias voltage with this first, second
When forming vertical electric field between substrate, the liquid crystal indicator is wide viewing angle display pattern；When the first electrode is not provided with
During bias voltage, the liquid crystal indicator is narrow viewing angle display pattern.
Preferably, the opposite polarity of the polarity of the bias voltage and the public electrode.
Preferably, the first substrate is provided with alignment film towards on the surface of the liquid crystal layer, and the alignment film is to utilize level
The pi liquid of orientation and the pi liquid of vertical orientation mix according to a certain percentage it is toasted after formed with receiving
The alignment film of rice body structure surface (nanostructured surfaces).
Preferably, the first substrate is provided with multiple raised structures towards on the surface of the liquid crystal layer, each raised structures
Shape of cross section be isosceles triangle, the base of the isosceles triangle is arranged on the first substrate, the isosceles triangle
The scope at base angle is that the plurality of raised structures are provided with towards the surface of the liquid crystal layer more than 0 degree and less than or equal to 60 degree
Vertical orientation film.
Preferably, the first substrate is provided with multiple raised structures towards on the surface of the liquid crystal layer, each raised structures
Shape of cross section be right angled triangle, a right-angle side of the right angled triangle is arranged on the first substrate, the right angle three
Angular hypotenuse is more than 0 degree and less than or equal to 60 with the scope of the angle of the right-angle side being arranged on the first substrate
Degree, the plurality of raised structures are provided with vertical orientation film towards the surface of the liquid crystal layer.
Preferably, the liquid crystal layer inclines in one direction adjacent to the liquid crystal molecule of the first substrate in the presence of tilt angle
Tiltedly.
Preferably, the liquid crystal layer inclines in the presence of tilt angle adjacent to the liquid crystal molecule of the first substrate towards both direction
Tiltedly.
Preferably, the liquid crystal layer adjacent to the scope of the initial tilt angle of the liquid crystal molecule of the second substrate be more than or equal to
0 degree and less than or equal to 5 degree.
Preferably, the liquid crystal layer is 2 degree adjacent to the initial tilt angle of the liquid crystal molecule of the second substrate.
Because the above-mentioned liquid crystal indicator that the embodiment of the present invention is provided passes through in the display framework for planar rotating
The liquid crystal layer of mixed orientation is set, when bias voltage is not applied in the first electrode, at the neighbouring first substrate
The tilt angle of the liquid crystal molecule near the tilt angle of liquid crystal molecule at nearly second substrate is big, makes the screen in the liquid crystal indicator
Stravismus produces light leak on direction, to realize narrow viewing angle display pattern；It is vertical to produce when bias voltage is applied in the first electrode
During straight electric field, the vertical electric field can reduce the tilt angle of the liquid crystal molecule at the neighbouring first substrate, and make in the liquid crystal display
Light leakage phenomena on the screen stravismus direction of device is accordingly reduced, therefore increases the visual angle of the liquid crystal indicator, wide to realize
Visual angle display pattern.Therefore the liquid crystal indicator is without using Protective film and without arranging two kinds of back lighting devices, therefore can be
The purpose of wide viewing angle and narrow viewing angle switching is realized under conditions of the thickness and back lighting device cost that do not increase liquid crystal display.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, and in order to allow the present invention above and other objects, features and advantages can
Become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, describe in detail as follows.
Description of the drawings
Fig. 1 is a kind of cross-sectional view of liquid crystal indicator that the first embodiment of the present invention is provided.
Fig. 2 is the application schematic diagram of liquid crystal indicator shown in Fig. 1 under narrow viewing angle display pattern.
Fig. 3 is the application schematic diagram of liquid crystal indicator shown in Fig. 1 under wide viewing angle display pattern.
Fig. 4 a to 4f are the visual angle simulation schematic diagram of liquid crystal indicator shown in Fig. 1 under narrow viewing angle display pattern.
Fig. 5 a and 5b are the visual angle simulation schematic diagram of liquid crystal indicator shown in Fig. 1 under wide viewing angle display pattern.
Fig. 6 is the visual angle simulation schematic diagram of traditional fringe field switch type liquid crystal indicator.
Fig. 7 a are the rotating state diagrams of the liquid crystal molecule of the liquid crystal indicator shown in Fig. 1 when GTG is 0.
Fig. 7 b are that the liquid crystal indicator shown in Fig. 1 is respectively under wide viewing angle and narrow viewing angle display pattern when GTG is 0
Neighbouring first substrate liquid crystal molecule tilt angle change contrast schematic diagram.
Fig. 8 a are the rotating state diagrams of the liquid crystal molecule of the liquid crystal indicator shown in Fig. 1 when GTG is 255.
Fig. 8 b are that the liquid crystal indicator shown in Fig. 1 is respectively in wide viewing angle and narrow viewing angle display pattern when GTG is 255
Under neighbouring first substrate liquid crystal molecule tilt angle change contrast schematic diagram.
Fig. 9 is the display effect schematic diagram of liquid crystal indicator shown in Fig. 1 under narrow viewing angle display pattern.
Figure 10 is the display effect schematic diagram of liquid crystal indicator shown in Fig. 1 under wide viewing angle display pattern.
Figure 11 is a kind of cross-sectional view of liquid crystal indicator that second embodiment of the invention is provided.
Figure 12 is a kind of cross-sectional view of liquid crystal indicator that third embodiment of the invention is provided.
Specific embodiment
Further to illustrate the present invention to reach technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Accompanying drawing and preferred embodiment, to according to liquid crystal indicator proposed by the present invention its specific embodiment, method, step, structure,
Feature and effect, describe in detail as after.
For the present invention aforementioned and other technology contents, feature and effect, in the following preferable reality coordinated with reference to schema
Applying during example is described in detail to be clearly presented.By the explanation of specific embodiment, when can be to the present invention to reach predetermined mesh
The technological means taken and effect be able to more deeply and it is specific understand, but institute's accompanying drawings are only to provide with reference to and say
It is bright to be used, not for being any limitation as to the present invention.
Fig. 1 is refer to, Fig. 1 is that a kind of cross-section structure of liquid crystal indicator that first embodiment of the invention is provided is illustrated
Figure.As shown in figure 1, liquid crystal indicator 10 includes the second substrate 12 that first substrate 11 and the first substrate 11 are oppositely arranged
And the liquid crystal layer 13 between first substrate 11 and second substrate 12.The liquid crystal indicator 10 is changed suitable for in-plane
(In-Plane Switching, IPS) type, fringe field switching (Fringe Field Switching, FFS) type etc. are applying
The liquid crystal indicator that liquid crystal molecule rotates in the plane with substrate-parallel during the electric field of display.In the present embodiment, should
Liquid crystal indicator 10 is illustrated by taking fringe field switch type as an example.
First substrate 11 is colored filter substrate, and second substrate 12 is thin-film transistor array base-plate.First substrate 11
Dorsad the surface of liquid crystal layer 13 is provided with the first polaroid 110, and the surface of the dorsad liquid crystal layer 13 of second substrate 12 is provided with second
Polaroid 120, first polaroid 110 is mutually perpendicular to the printing opacity direction of principal axis of second polaroid 120.
First substrate 11 is disposed with the alignment film 114 of first electrode 112 and first towards the surface of liquid crystal layer 13.This
One electrode 112 is transparency electrode.First alignment film 114 is the poly- Asia of the pi liquid using horizontal direction matching and vertical orientation
Acid amides (Polyimide, PI) liquid mix according to a certain percentage it is toasted after formed with nanostructured surface
The alignment film of (nanostructured surfaces), wherein, the mixing pi liquid of the vertical orientation and horizontal direction matching
In, the concentration of the pi of vertical orientation is 0%～23% (quality).
Second substrate 12 is disposed with second electrode 122, insulating barrier 124, the 3rd electrode towards the surface of liquid crystal layer 13
126 and second alignment film 128, and cause the brushing of the second alignment film 128 to be oriented parallel to the light transmission shaft side of the second polaroid 120
To while the brushing direction of the first alignment film 114 is vertical with the brushing direction of the second alignment film 128.The second electrode 122 and
Three electrodes 126 are transparency electrode.In the present embodiment, the second electrode 122 be plane-shape electrode structure, the 3rd electrode 126
Including multiple strip sub-electrodes (sign) being parallel to each other, in other embodiments, the second electrode 122 may also comprise multiple
The strip sub-electrode being parallel to each other, and the strip sub-electrode of second electrode 122 can with the strip sub-electrode of the 3rd electrode 126
Insulation is intersecting.In the present embodiment, the second electrode 122 is pixel electrode, and the 3rd electrode 126 is public electrode, at other
In embodiment, the second electrode 122 is alternatively public electrode, and the 3rd electrode 126 is pixel electrode.
The liquid crystal layer 13 is more than or equal to 30 degree adjacent to the scope of the initial pretilt theta of the liquid crystal molecule of first substrate 11
And less than 90 degree, i.e.,：30 °≤90 ° of θ ﹤；The liquid crystal layer 13 is horizontal direction matching adjacent to the liquid crystal molecule of second substrate 12, in reality
Using in, the liquid crystal layer 13 is greater than or equal to 0 degree adjacent to the scope of the initial pretilt theta of the liquid crystal molecule of second substrate 12
And less than or equal to 5 degree, i.e.,：0 ° ≦ θ≤5 °, preferably 2 degree.In the present embodiment, the liquid crystal layer 13 is adjacent to the first substrate
11 liquid crystal molecule is inclined in one direction in the presence of tilt angle.
Liquid crystal molecule in liquid crystal layer 13 is negative liquid crystal molecule, because negative liquid crystal molecule is along vertical with direction of an electric field
Direction rotate, therefore when applying the electric field of display in the liquid crystal indicator 10, the negative liquid crystal in liquid crystal layer 13 point
Son can be in the rotation with surface parallel with first substrate 11, second substrate 12, and short-axis direction is parallel with direction of an electric field, makes liquid
The translucency of crystal layer 13 is more preferably.
Liquid crystal indicator 10 can switch between wide viewing angle and narrow viewing angle display pattern.Fig. 2 is refer to, Fig. 2 is Fig. 1 institutes
Application schematic diagram of the liquid crystal indicator 10 for showing under narrow viewing angle display pattern.As shown in Fig. 2 in the first electrode 112 not
Bias voltage is provided, due to the liquid at nearly second substrate 12 near the tilt angle of the liquid crystal molecule at the neighbouring first substrate 11
The tilt angle of brilliant molecule is big, therefore when the liquid crystal indicator 10 is shown, it is oblique in the screen of the liquid crystal indicator 10
In apparent direction, the light through liquid crystal molecule is no longer matched due to phase delay with polaroid, light leakage phenomena occurs, is caused from this
When watching screen on the screen stravismus direction of liquid crystal indicator 10, the contrast on screen is reduced, and affects viewing effect, so as to
Realize narrow viewing angle display pattern.
Refer to Fig. 3, Fig. 3 is the application schematic diagram of liquid crystal indicator 10 shown in Fig. 1 under wide viewing angle display pattern.
As shown in Figure 3, there is provided certain bias voltage (such as 5V) gives first electrode 112, the polarity of the bias voltage and the public electrode
Opposite polarity, so as to form vertical electric field between first, second substrate 11,12.Because the major axis of negative liquid crystal molecule exists
Electric field action lower edge rotates perpendicular to the direction of electric field, therefore, because the presence of the vertical electric field, the liquid crystal in liquid crystal layer 13
In the presence of the vertical electric field, the tilt angle of the liquid crystal molecule at the neighbouring first substrate 11 can reduce therewith molecule, when subtracting
When as little as close with the tilt angle of the liquid crystal molecule at second substrate 12, in the screen stravismus side of the liquid crystal indicator 10
Light leakage phenomena upwards can be reduced accordingly, therefore the visual angle of the liquid crystal indicator 10 increases therewith, so as to realize that wide viewing angle shows
Show pattern.
Below by with the visual angle, the design sketch that are simulated using TechWiz softwares further to the liquid crystal indicator 10
Illustrate.
Fig. 4 a to 4f are the visual angle simulation schematic diagram of liquid crystal indicator 10 shown in Fig. 1 under narrow viewing angle display pattern.
Wherein, Fig. 4 a, 4b, 4c, 4d, 4e and 4f is respectively illustrated when bias voltage is not provided with the first electrode 112, the liquid crystal
Layer 13 is respectively 30 degree, 40 degree, 50 degree, 60 degree, 70 degree and 80 adjacent to the initial pretilt theta of the liquid crystal molecule of first substrate 11
When spending, the simulation visual angle of the liquid crystal indicator 10.Can be seen that with the increase of initial pretilt theta from Fig. 4 a to 4f, the liquid
In the horizontal direction upward angle of visibility can be gradually decreased crystal device 10, such as when initial pretilt theta is 40 degree, can be with horizontal direction
Effective angular field of view of viewing screen about -30 degree, to 30 degree, meet the demand that narrow viewing angle shows.
Refer to following table, the table show initial pretilt theta for 40 degree when, in the first electrode 112 provide biased electrical
The liquid crystal indicator 10 exists when pressure is respectively 0V (not providing bias voltage), 2V, 3V, 4V, 5V, 6V, 7V, 8V, 9V and 10V
Simulation visual angle on the direction of upper and lower, left and right.
As can be seen from the table, the bias voltage for providing in the first electrode 112 is 0V, is namely not provided with biasing
During voltage, maximum visual angle difference -30 degree and 30 degree of the liquid crystal indicator 10 on left and right directions (i.e. horizontal direction) meets
The demand that narrow viewing angle shows.And bias voltage from 2V up increase when, visual angle also becomes therewith big, and starts to 10V from 4V, on
Effective visual angle of lower left and right directions can reach 85 degree, and have almost no change.As can be seen here, there is provided the bias voltage of 4V
The demand that wide viewing angle shows is realized, however, it is contemplated that the other factors such as penetrance, are preferred with the bias voltage of 5V, that is to say, that
The bias voltage of 5V is not only capable of achieving the demand that shows of wide viewing angle, and can meet other display conditions such as penetrance.
Fig. 5 a, 5b are the visual angle simulation schematic diagram of liquid crystal indicator shown in Fig. 1 under wide viewing angle display pattern.Its
In, Fig. 5 a are, when the liquid crystal layer 13 is 40 degree adjacent to the initial pretilt theta of the liquid crystal molecule of first substrate 11, and to be supplied to first
The simulation visual angle of the liquid crystal indicator 10 when the bias voltage of electrode 112 is 5V, Fig. 5 b are when the liquid crystal layer 13 is adjacent to first
The initial pretilt theta of the liquid crystal molecule of substrate 11 is 40 degree, and be supplied to the bias voltage of first electrode 112 for 10V when the liquid
The simulation visual angle of crystal device 10.(Fig. 5 a and Fig. 5 b under conditions of contrast is for 10 are can be seen that from Fig. 5 a and Fig. 5 b figures
Shown in white dashed line be contrast be 10 wait reference line), when bias voltage is respectively 5V and 10V, the liquid crystal display
Effective visual angle of the device 10 on direction up and down can reach 85 degree, and the center contrast difference of the two is less, therefore, partially
Put voltage and elect 5V as and may conform to the demand that wide viewing angle shows.
Fig. 6 is refer to, Fig. 6 is the visual angle simulation schematic diagram of traditional fringe field type liquid crystal indicator.Wherein, Fig. 6
What is represented is initial pre-dumping of the liquid crystal molecule of traditional fringe field type liquid crystal indicator at neighbouring first, second substrate
The simulation visual angle of liquid crystal indicator when angle is 2 degree.Comparison diagram 5a and Fig. 6, it can be seen that the liquid crystal indicator 10 exists
Up and down the effective visual angle on direction can reach 85 degree, and with the center pair of traditional fringe field type liquid crystal indicator
It is more little than difference, therefore, bias voltage is elected the liquid crystal indicator 10 of 5V as and is capable of achieving close to traditional fringe field type liquid
The display effect of crystal device.
Fig. 7 a and Fig. 7 b are refer to, Fig. 7 a are the liquid crystal molecules of the liquid crystal indicator 10 shown in Fig. 1 when GTG is 0
Rotating state diagram, Fig. 7 b be when GTG be 0 when, the liquid crystal indicator 10 shown in Fig. 1 is regarded respectively in wide viewing angle with narrow
The change contrast schematic diagram of the tilt angle of the liquid crystal molecule of the neighbouring first substrate 11 under the display pattern of angle.Specifically, Fig. 7 b
Show take when the thickness of liquid crystal box of the liquid crystal indicator 10 is 3.5 μm apart from second substrate 12 height be 3.2 μm at
The liquid of (being in the altitude range apart from second substrate 12 can be with value in 2.5um～3.5um, and that here is chosen is 3.2um)
Different positions of the brilliant molecule (as shown in Figure 7a) in wide viewing angle from the cross section of narrow viewing angle display pattern lower edge liquid crystal indicator 10
Put the change of place's tilt angle, it can be seen that when GTG is 0, there is provided the liquid of the neighbouring first substrate 11 after the bias voltage of 5V
The tilt angle of brilliant molecule is significantly lower than the tilt angle during bias voltage for providing 0V.
Fig. 8 a and Fig. 8 b are refer to, Fig. 8 a are the liquid crystal point of the liquid crystal indicator 10 shown in Fig. 1 when GTG is 255
Son rotating state diagram, Fig. 8 b be when GTG be 255 when, the liquid crystal indicator 10 shown in Fig. 1 respectively wide viewing angle with
The change contrast schematic diagram of the tilt angle of the liquid crystal molecule of the neighbouring first substrate 11 under narrow viewing angle display pattern.Specifically,
Fig. 8 b show when the thickness of liquid crystal box of the liquid crystal indicator 10 is 3.5 μm and take and the liquid at the same position shown in Fig. 7 a
Various location tilt angle of the brilliant molecule in wide viewing angle Yu the cross section of narrow viewing angle display pattern lower edge liquid crystal indicator 10
Change, it can be seen that when GTG be 255 when, there is provided the liquid crystal molecule of the neighbouring first substrate 11 after the bias voltage of 5V it is pre-
Inclination angle is significantly lower than tilt angle when not providing bias voltage.Therefore, Fig. 7 b and Fig. 8 b can also prove, in narrow viewing angle mould is shown
Under formula, the tilt angle of the liquid crystal molecule of neighbouring first substrate 11 is larger, and after bias voltage is applied, neighbouring first substrate 11
The tilt angle of liquid crystal molecule is significantly reduced, so as to be capable of achieving the purpose that wide viewing angle shows.
Refer to Fig. 9, Fig. 9 is that the display effect of liquid crystal indicator 10 shown in Fig. 1 under narrow viewing angle display pattern is shown
It is intended to.Wherein, the liquid crystal layer 13 adjacent to the initial tilt angle of the liquid crystal molecule of first substrate 11 be 40 degree when, can from Fig. 9
So that, it is evident that at least in the horizontal direction, the image effect ratio watched from more than 45 degree of stravismus angles is seen from screen is square
The image effect seen is poor, therefore meets the demand that narrow viewing angle shows, can effectively play the effect of peep-proof.
Refer to Figure 10, Figure 10 is the display effect of liquid crystal indicator 10 shown in Fig. 1 under wide viewing angle display pattern
Schematic diagram.Wherein, the liquid crystal layer 13 adjacent to the liquid crystal molecule of first substrate 11 initial tilt angle be 40 degree when, can be from Figure 10
, it is apparent that on direction up and down, the image effect watched from 45 degree of stravismus angles with see from screen is square
The image effect seen is very nearly the same, therefore meets the demand that wide viewing angle shows.
In sum, above-mentioned liquid crystal indicator 10 passes through to arrange mixed orientation in the display framework for planar rotating
Liquid crystal layer, when bias voltage is not applied on the first substrate 11, due to the liquid crystal molecule at the neighbouring first substrate 11
The tilt angle of the liquid crystal molecule near tilt angle at nearly second substrate 12 is big, makes in the screen stravismus side of the liquid crystal indicator 10
Light leak is produced upwards, to realize narrow viewing angle display pattern；When applying bias voltage on the first substrate 11 producing vertical electricity
During field, the vertical electric field can reduce the tilt angle of the liquid crystal molecule at the neighbouring first substrate 11, and make in the liquid crystal display dress
The light leakage phenomena put on 10 screen stravismus direction is accordingly reduced, therefore increases the visual angle of the liquid crystal indicator 10, to realize
Wide viewing angle display pattern.Therefore the liquid crystal indicator 10 is without using Protective film and without arranging two kinds of back lighting devices, therefore
The purpose of wide viewing angle and narrow viewing angle switching can be realized under conditions of the thickness and back lighting device cost for not increasing liquid crystal display.
Figure 11 is refer to, Figure 11 is that a kind of cross-section structure of liquid crystal indicator that second embodiment of the invention is provided is illustrated
Figure.As shown in figure 11, the difference of the liquid crystal indicator 10 that the liquid crystal indicator 20 is provided with first embodiment is essentially consisted in
Realize that liquid crystal layer 23 is different adjacent to the mode of the orientation of the liquid crystal molecule of first substrate 21.The first substrate 21 is towards the liquid crystal layer
Multiple raised structures 210 are provided with 23 surface, the raised structures 210 can be the string configuration being parallel to each other, the projection
The shape of cross section of structure 210 is isosceles triangle, and the base of the isosceles triangle is arranged on the first substrate 21, the isosceles
The scope of the base angle of triangle is more than 0 degree and less than or equal to 60 degree, so that the liquid crystal point of the neighbouring first substrate
The scope of the initial tilt angle of son is that the plurality of raised structures 210 are towards the liquid crystal layer more than or equal to 30 degree and less than 90 degree
Vertical orientation film 212 is provided with 23 surface, so as to according to the cooperation of the raised structures 210 and vertical orientation film 212 with reality
Existing liquid crystal layer 23 is more than or equal to 30 degree and less than 90 adjacent to the scope of the initial tilt angle of the liquid crystal molecule of first substrate 21
Degree.
In the present embodiment, as shown in figure 11, the liquid crystal layer 23 adjacent to the liquid crystal molecule of the first substrate 21 in tilt angle
In the presence of towards both direction incline, i.e., perpendicular to the isosceles triangle cross section of the raised structures 210 two waists direction.
Figure 12 is refer to, Figure 12 is that a kind of cross-section structure of liquid crystal indicator that third embodiment of the invention is provided is illustrated
Figure.As shown in figure 11, the difference of the liquid crystal indicator 10 that the liquid crystal indicator 30 is provided with first embodiment is essentially consisted in
Realize that liquid crystal layer 33 is different adjacent to the mode of the orientation of the liquid crystal molecule of first substrate 31.The first substrate 31 is towards the liquid crystal layer
Multiple raised structures 310 are provided with 33 surface, the raised structures 310 can be the string configuration being parallel to each other, the projection
The shape of cross section of structure 310 is right angled triangle, and a right-angle side of the right angled triangle is arranged on the first substrate 31,
The hypotenuse of the right angled triangle is more than 0 degree and little with the scope of the angle β of the right-angle side being arranged on the first substrate 31
In or equal to 60 degree so that the scope of the initial tilt angle of the liquid crystal molecule of the neighbouring first substrate be more than or equal to
30 degree and less than 90 degree, the plurality of raised structures 310 are provided with vertical orientation film 312 towards the surface of the liquid crystal layer 33, so as to
According to the cooperation of the raised structures 310 and vertical orientation film 312 realizing liquid crystal molecule of the liquid crystal layer 33 adjacent to first substrate 31
The scope of initial tilt angle be more than or equal to 30 degree and less than 90 degree.
In the present embodiment, as shown in figure 12, the liquid crystal layer 33 adjacent to the liquid crystal molecule of the first substrate 31 in tilt angle
In the presence of incline in one direction, i.e., perpendicular to the right angled triangle cross section of the raised structures 310 hypotenuse direction.
The above is only presently preferred embodiments of the present invention, any pro forma restriction is not made to the present invention, although this
Invention is disclosed above with preferred embodiment, but is not limited to the present invention, any those skilled in the art,
In the range of technical solution of the present invention, when making a little change using the technology contents of the disclosure above or be modified to equivalent
The Equivalent embodiments of change, as long as being that, without departing from technical solution of the present invention content, the technical spirit according to the present invention is real to more than
Any simple modification, equivalent variations and modification that example is made are applied, is still fallen within the range of technical solution of the present invention.
Claims (9)
1. a kind of liquid crystal indicator of achievable view angle switch, including first substrate and the first substrate be oppositely arranged
Two substrates and the liquid crystal layer between the first substrate and the second substrate, be provided with the second substrate pixel electrode and
Public electrode, it is characterised in that the liquid crystal molecule in the liquid crystal layer is negative liquid crystal molecule, and the first substrate is towards the liquid crystal layer
Surface on be provided with first electrode, the liquid crystal layer is big adjacent to the scope of the initial tilt angle of the liquid crystal molecule of the first substrate
In or equal to 30 degree and less than 90 degree, the liquid crystal layer adjacent to the second substrate liquid crystal molecule be horizontal direction matching；The first electrode
For transparency electrode, when the first electrode is provided bias voltage to form vertical electric field between first, second substrate, it is somebody's turn to do
Liquid crystal indicator is wide viewing angle display pattern；When the first electrode is not provided with bias voltage, the liquid crystal indicator
For narrow viewing angle display pattern.
2. liquid crystal indicator according to claim 1, it is characterised in that the polarity of the bias voltage and the public electrode
Opposite polarity.
3. liquid crystal indicator according to claim 1, it is characterised in that surface of the first substrate towards the liquid crystal layer
On be provided with alignment film, the alignment film is according to one using the pi liquid of horizontal direction matching and the pi liquid of vertical orientation
The alignment film with nanostructured surface (nanostructured surfaces) formed after certainty ratio mixing is toasted.
4. liquid crystal indicator according to claim 1, it is characterised in that surface of the first substrate towards the liquid crystal layer
On be provided with multiple raised structures, the shape of cross section of each raised structures is isosceles triangle, the base of the isosceles triangle
Be arranged on the first substrate, the scope at the base angle of the isosceles triangle be more than 0 degree and less than or equal to 60 degree, it is the plurality of
Raised structures are provided with vertical orientation film towards the surface of the liquid crystal layer.
5. liquid crystal indicator according to claim 1, it is characterised in that surface of the first substrate towards the liquid crystal layer
On be provided with multiple raised structures, the shape of cross section of each raised structures is right angled triangle, one of the right angled triangle
Right-angle side is arranged on the first substrate, the folder of the hypotenuse of the right angled triangle and the right-angle side being arranged on the first substrate
The scope at angle is that, more than 0 degree and less than or equal to 60 degree, the plurality of raised structures are provided with vertical towards the surface of the liquid crystal layer
Straight alignment film.
6. liquid crystal indicator according to claim 1, it is characterised in that liquid crystal of the liquid crystal layer adjacent to the first substrate
Molecule is inclined in one direction in the presence of tilt angle.
7. liquid crystal indicator according to claim 1, it is characterised in that liquid crystal of the liquid crystal layer adjacent to the first substrate
Molecule is inclined in the presence of tilt angle towards both direction.
8. liquid crystal indicator according to claim 1, it is characterised in that liquid crystal of the liquid crystal layer adjacent to the second substrate
The scope of the initial tilt angle of molecule is more than or equal to 0 degree and less than or equal to 5 degree.
9. liquid crystal indicator according to claim 8, it is characterised in that liquid crystal of the liquid crystal layer adjacent to the second substrate
The initial tilt angle of molecule is 2 degree.
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104865757B (en) | 2015-05-22 | 2019-09-17 | 昆山龙腾光电有限公司 | A kind of method of controlling viewing angle of display panel, display device and display panel |
| CN105223743B (en) * | 2015-08-25 | 2018-06-01 | 昆山龙腾光电有限公司 | The changeable liquid crystal display device in visual angle |
| CN105068337B (en) * | 2015-08-26 | 2018-04-20 | 昆山龙腾光电有限公司 | The changeable liquid crystal display device in visual angle |
| CN105372883B (en) * | 2015-11-03 | 2018-05-29 | 昆山龙腾光电有限公司 | The changeable liquid crystal display device in visual angle |
| CN105446014B (en) * | 2015-12-24 | 2019-05-14 | 昆山龙腾光电有限公司 | The liquid crystal display device of view angle switch can be achieved |
| CN105425480B (en) | 2015-12-31 | 2018-09-18 | 昆山龙腾光电有限公司 | The liquid crystal display device and its view angle switch method of switchable viewing angle |
| CN105739195B (en) * | 2016-04-13 | 2019-03-15 | 昆山龙腾光电有限公司 | Liquid crystal display device and its driving method |
| CN105807511B (en) * | 2016-04-13 | 2020-01-03 | 昆山龙腾光电有限公司 | Display panel, display device and driving method thereof |
| CN105807512B (en) * | 2016-04-13 | 2019-11-19 | 昆山龙腾光电有限公司 | Display panel, display device and its driving method |
| CN106293592B (en) * | 2016-07-20 | 2019-06-07 | 昆山龙腾光电有限公司 | A kind of method and system automatically adjusting waveform biasing |
| CN106023908B (en) * | 2016-07-25 | 2018-09-04 | 昆山龙腾光电有限公司 | Backlight drive circuit and control method for liquid crystal display device |
| 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 |
| TWI706200B (en) * | 2019-05-16 | 2020-10-01 | 友達光電股份有限公司 | Optical apparauts |
| CN110456580B (en) | 2019-08-26 | 2022-04-29 | 京东方科技集团股份有限公司 | Display substrate, control method thereof, display panel and display device |
| CN110618547B (en) * | 2019-09-24 | 2022-02-15 | 昆山龙腾光电股份有限公司 | Liquid crystal display device and driving method thereof |
| CN110764322B (en) * | 2019-11-28 | 2022-09-23 | 昆山龙腾光电股份有限公司 | Liquid crystal display device and driving method thereof |
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