CN108549173A - Backlight module, liquid crystal display device and driving method - Google Patents
Backlight module, liquid crystal display device and driving method Download PDFInfo
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- CN108549173A CN108549173A CN201810177344.8A CN201810177344A CN108549173A CN 108549173 A CN108549173 A CN 108549173A CN 201810177344 A CN201810177344 A CN 201810177344A CN 108549173 A CN108549173 A CN 108549173A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000002798 polar solvent Substances 0.000 claims abstract description 18
- 201000009310 astigmatism Diseases 0.000 claims abstract description 7
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims description 85
- 239000005264 High molar mass liquid crystal Substances 0.000 claims description 33
- 230000005540 biological transmission Effects 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 4
- 239000012454 non-polar solvent Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 12
- 230000000007 visual effect Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 230000005684 electric field Effects 0.000 description 5
- 239000012528 membrane Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013047 polymeric layer Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
Classifications
-
- 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- 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
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal (AREA)
- Dispersion Chemistry (AREA)
Abstract
The invention discloses a kind of backlight modules, liquid crystal display device and driving method, backlight module includes light source, light guide plate and Electrowetting device, the light emission side in light guide plate is arranged in Electrowetting device, Electrowetting device includes the first electrode being oppositely arranged and second electrode and multiple barricades for being set between first electrode and second electrode, space between first electrode and second electrode is separated to form multiple closed chambers by multiple barricades, each closed chamber is equipped with hydrophobic dielectric layer, polar solvent and non-polar solution, first electrode and second electrode, which are used to apply voltage, makes polar solvent in each closed chamber and non-polar solution be formed as astigmatism state or spot condition, to change light that light source is sent out in the shooting angle after Electrowetting device.
Description
Technical field
The present invention relates to the technical fields of liquid crystal display, more particularly to a kind of backlight module, liquid crystal display device and drive
Dynamic method.
Background technology
Liquid crystal display device (liquid crystal display, LCD) has good, small, light-weight, the low drive of image quality
Dynamic voltage, low-power consumption, radiationless and relatively low manufacturing cost advantage, occupy an leading position in flat display field.
Present liquid crystal display device gradually develops towards wide viewing angle direction, such as uses in-plane-switching mode (IPS) or edge
Wider visual angle may be implemented in the changeable liquid crystal display device in the visual angle of field switch pattern (FFS).The design of wide viewing angle makes
It obtains user and complete and distortionless picture can be seen from all directions.However, today's society people increasingly focus on protecting
The privacy of oneself has many things and does not like to take out and shares with people.In public, always wish oneself seeing the mobile phone or
Content is secrecy when browsing computer.Therefore, the display of single visual angle pattern cannot meet the needs of user.
Other than the demand of wide viewing angle, under the occasion for needing peep-proof, it is also desirable to display device can be switched or be adjusted to narrow
Field-of-view mode.
Currently, industry proposes that the bias electrode using the side colored filter substrate (CF) applies one to liquid crystal molecule and hangs down
Straight electric field, to realize width view angle switch.As shown in Figure 1, display panel 10 is including upper substrate 11, lower substrate 12 and is located at upper base
Liquid crystal layer 13 between plate 11 and lower substrate 12, upper substrate 11 are equipped with bias electrode 111.When wide viewing angle is shown, upper substrate 11
Bias electrode 111 not give voltage, display panel 10 realize wide viewing angle show.When needing narrow viewing angle to show, upper substrate 11
Bias electrode 111 gives voltage, vertical electric field, the liquid crystal molecule meeting of liquid crystal layer 13 can be formed between upper substrate 11 and lower substrate 12
It is tilted because of vertical electric field, the contrast reduction because of light leakage of display panel 10 is final to realize that narrow viewing angle is shown.
In the changeable liquid crystal display device in current visual angle, when display panel 10 is in narrow viewing angle pattern, backlight mould
It is still the light at big visual angle that group 30, which is supplied to the light of display panel 10, at this time to this in terms of the side of the liquid crystal display device
When liquid crystal display device, it may appear that light leakage, brightness is bright, to influence usage experience.
Invention content
In order to overcome shortcoming and defect existing in the prior art, the purpose of the present invention is to provide a kind of backlight module,
Liquid crystal display device and driving method solve side leakage problem of the liquid crystal display device under narrow viewing angle pattern.
The purpose of the invention is achieved by the following technical solution：
The present invention provides a kind of backlight module, including light source and light guide plate, backlight module further include Electrowetting device, electricity profit
The light emission side in light guide plate is arranged in wet device, and Electrowetting device includes the first electrode being oppositely arranged and second electrode and setting
Multiple barricades between first electrode and second electrode, multiple barricades separate the space between first electrode and second electrode
Multiple closed chambers are formed, each closed chamber is equipped with hydrophobic dielectric layer, polar solvent and non-polar solution, first electrode and the second electricity
Pole, which is used to apply voltage, makes polar solvent in each closed chamber and non-polar solution be formed as astigmatism state or spot condition, with
The light that change light source is sent out is in the shooting angle after Electrowetting device.
Further, first electrode and second electrode are entire planar structure.
The present invention also provides a kind of backlight module, including light source and light guide plate, backlight module further includes polymer liquid crystal box,
The light emission side in light guide plate is arranged in polymer liquid crystal box, and polymer liquid crystal box includes the first electrode and second electrode being oppositely arranged
And multiple barricades between first electrode and second electrode are set to, multiple barricades will be between first electrode and second electrode
Space is separated to form multiple closed chambers, and each closed chamber is equipped with polymer liquid crystal, and first electrode is pattern structure and includes more
The electrode block of a mutually insulated, each electrode block is corresponding with a closed chamber, and first electrode is with second electrode for applying electricity
Pressure is so that the polymer liquid crystal in closed chamber corresponding with each electrode block is formed as light transmission state or shading status, to change
The light that light source is sent out is in the shooting angle after polymer liquid crystal box.
Further, second electrode is entire planar structure.
The present invention also provides a kind of liquid crystal display device, including display panel and backlight module as described above, display surfaces
Plate includes the lower substrate that upper substrate and upper substrate are oppositely arranged and the liquid crystal layer between upper substrate and lower substrate.
Further, upper substrate is equipped with top electrode in the side towards lower substrate, and lower substrate is in the side towards upper substrate
Equipped with public electrode and pixel electrode.
The present invention also provides a kind of driving method of liquid crystal display device, driving method includes：
When needing liquid crystal display device wide viewing angle to show, control backlight module is wide shooting angle；
When needing liquid crystal display device narrow viewing angle to show, control backlight module is narrow shooting angle.
Further, driving method includes：
When needing liquid crystal display device wide viewing angle to show, control the display panel in wide viewing angle display pattern；
When needing liquid crystal display device narrow viewing angle to show, control the display panel in narrow viewing angle display pattern.
Further, if backlight module includes Electrowetting device, make when applying voltage to first electrode and second electrode
When voltage difference between first electrode and second electrode is zero, polar solvent and non-polar solution in each closed chamber are formed as
Astigmatism state, backlight module are wide shooting angle；Make first electrode and second when applying voltage to first electrode and second electrode
When voltage difference between electrode is more than preset value, polar solvent and non-polar solution in each closed chamber are formed as optically focused shape
State, backlight module are narrow shooting angle.
Further, if backlight module includes polymer liquid crystal box, when applying voltage to first electrode and second electrode
When the voltage difference between each electrode block and second electrode being made to be more than preset value, in closed chamber corresponding with each electrode block
Polymer liquid crystal is light transmission state, and backlight module is wide shooting angle；Make when applying voltage to first electrode and second electrode
When voltage difference between some of electrode blocks and second electrode is zero, closed chamber corresponding with some of electrode blocks
Interior polymer liquid crystal is shading status, and the polymer liquid crystal in closed chamber corresponding with remaining remaining electrode block is
Light transmission state, backlight module are narrow shooting angle.
Advantageous effect of the present invention is：When liquid crystal display device is when narrow viewing angle pattern is shown, liquid crystal display device is reduced
The light leakage of side reduces side view brightness, improves the display effect of liquid crystal display device.
Description of the drawings
Fig. 1 is the light extraction schematic diagram of liquid crystal display device backlight module under narrow viewing angle in the prior art.
Fig. 2 be in first embodiment of the invention liquid crystal display device in the structural schematic diagram of wide viewing angle.
Fig. 3 be in first embodiment of the invention liquid crystal display device in the structural schematic diagram of narrow viewing angle.
Fig. 4 is the energization change schematic diagram of non-polar solution and polar solvent in the embodiment of the present invention.
Fig. 5 be in second embodiment of the invention liquid crystal display device in the structural schematic diagram of wide viewing angle.
Fig. 6 be in second embodiment of the invention liquid crystal display device in the structural schematic diagram of narrow viewing angle.
Fig. 7 be in third embodiment of the invention liquid crystal display device in the structural schematic diagram of wide viewing angle.
Fig. 8 be in third embodiment of the invention liquid crystal display device in the structural schematic diagram of narrow viewing angle.
Fig. 9 be in another embodiment of the present invention liquid crystal display device in the structural schematic diagram of wide viewing angle.
Figure 10 is the status diagram of liquid crystal display device closed chamber in narrow viewing angle in third embodiment of the invention.
Figure 11 be in another embodiment of the present invention liquid crystal display device in the structural schematic diagram of narrow viewing angle.
Specific implementation mode
The present invention is described in further detail in the following with reference to the drawings and specific embodiments, but is not the present invention's
Practical range is confined to this.
[first embodiment]
As shown in Fig. 2, first embodiment of the invention provides a kind of liquid crystal display device, including backlight module 30 and display surface
Plate 10, display panel 10 include upper substrate 11, the lower substrate 12 being oppositely arranged with upper substrate 11 and are located at upper substrate 11 under
Liquid crystal layer 13 between substrate 12, lower substrate 12 are equipped with public electrode 121 and pixel electrode in the side towards upper substrate 11
122。
Further, backlight module 30 includes light source 34 and light guide plate 32, and the light emission side of light guide plate 32 is equipped with prismatic lens 31,
Backlight module 30 further includes Electrowetting device 20, and Electrowetting device 20 is arranged on prismatic lens 31, and the other side of light guide plate 32 is also
Equipped with package frame 33, Electrowetting device 20 includes the first electrode 211 that is oppositely arranged and second electrode 221 and is set to first
Multiple barricades 233 between electrode 211 and second electrode 221, multiple barricades 233 by first electrode 211 and second electrode 221 it
Between space be separated to form multiple closed chambers 230, each closed chamber 230 is equipped with hydrophobic dielectric layer 222, polar solvent 232 and non-
Polar solvent 231, first electrode 211 and second electrode 221, which are used to apply voltage, makes polar solvent in each closed chamber 230
232 and non-polar solution 231 be formed as astigmatism state or spot condition, to change light that light source 34 is sent out by electrowetting
Shooting angle after device 20.When first electrode 211 and second electrode 221 are not powered on, non-polar solution 231 is to hydrophobic
The affinity of dielectric layer 222 is more than polar solvent 232, and non-polar solution 231 is made to be laid in closed chamber 230.
Specifically, Electrowetting device 20 further includes first substrate 21 and second substrate 22, and first electrode 211 is arranged first
Towards the side of second substrate 22, second electrode 221 is arranged in second substrate 22 towards the side of first substrate 21 substrate 21.
Further, Electrowetting device 20 includes driving circuit 24, and driving circuit 24 is used for first electrode 211 and second
Electrode 221 applies voltage.
As shown in Fig. 2, when needing liquid crystal display device wide viewing angle to show, applied to first electrode 211 and second electrode 221
Making alive makes the voltage difference between first electrode 211 and second electrode 221 when being zero, and non-polar solution 231 is laid in closed chamber
In 230, polar solvent 232 and non-polar solution 231 in each first closed chamber 230 are formed as astigmatism state, and light is from close
Closed chamber projects straight, and backlight module 30 is wide shooting angle at this time, and the light-emitting angle of backlight module 30 is 90 °, to reach to whole
A display panel 10 provides the purpose of light.
As shown in Figure 3 to Figure 4, when needing liquid crystal display device narrow viewing angle to show, to first electrode 211 and second electrode
When 221 application voltages make the voltage difference between first electrode 211 and second electrode 221 be more than preset value, on hydrophobic dielectric layer 222
The distribution of charges of generation, which can increase it, makes the affinity of polar solvent 232 non-polar solution in each closed chamber 230
231 thereto heart point gather, the contact angle of non-polar solution 231 and hydrophobic dielectric layer 222 increases so that non-polar solution 231
Become tapered, light reflects when across non-polar solution 231,232 He of polar solvent in each first closed chamber 230
Non-polar solution 231 is formed as spot condition, and backlight module 30 is narrow shooting angle at this time, and the shooting angle of backlight module 30 subtracts
As low as 60 °, the big visual angle side of light directive liquid crystal display device will not be made.
The polar solvent 232 and non-polar solution 231 of the present embodiment are clear solution.
The advantageous effect of the present embodiment is that the shooting angle by controlling backlight module 30 realizes liquid crystal display device
When solution liquid crystal display device is in narrow viewing angle, there is side because backlight module 30 is wide shooting angle in width view angle switch
The high problem of light leakage, brightness, and improve the display effect of liquid crystal display device.
[second embodiment]
As shown in figure 5, the liquid crystal display in liquid crystal display device and first embodiment that second embodiment of the invention provides
Device is essentially identical, the difference is that, in the present embodiment, upper substrate 11 is equipped with top electrode in the side towards lower substrate 12
111, by applying voltage between top electrode 111 and public electrode 121, it can control display panel 10 in wide viewing angle and narrow viewing angle
Switching.
Specifically, upper substrate 11 is color membrane substrates, and lower substrate 12 is array substrate, when the public electrode on lower substrate 12
121 provide reference voltage, and the top electrode 111 on upper substrate 11 provides the voltage for being more than preset value with the reference voltage pressure difference
When, upper substrate 11 and lower substrate 12 electric field that will produce one vertical so that the long axis of the liquid crystal molecule in the first liquid crystal layer 13
Substantially parallel with upper substrate 11, the picture visual angle of display panel 10 reduces at this time, and display panel 10 is narrow viewing angle pattern, from
The side of liquid crystal display device sees that contrast reduces and visual angle narrows, and liquid crystal display device is also narrow viewing angle pattern.
It please join Fig. 5, when needing liquid crystal display device wide viewing angle to show, control the display panel 10 and show mould in wide viewing angle
Formula, while it is wide shooting angle to control backlight module 30；
It please join Fig. 6, when needing liquid crystal display device narrow viewing angle to show, control the display panel 10 and show mould in narrow viewing angle
Formula, while it is narrow shooting angle to control backlight module 30.
Remaining structure and operation principle of the present embodiment are identical with the first embodiment, and which is not described herein again.
When the liquid crystal display device of the present embodiment is in narrow viewing angle pattern, 10 picture visual angle of display panel reduces, and makes
Light shooting angle when across Electrowetting device 20 reduces, and achievees the effect that reduce 30 angle of divergence of backlight module, solves liquid crystal
When display device is in narrow viewing angle, there is the high problem of side light leakage, brightness because backlight module 30 is wide shooting angle, improve
The display effect of liquid crystal display device.
[3rd embodiment]
As shown in fig. 7, third embodiment of the invention provides a kind of liquid crystal display device, including backlight module 30 and display surface
Plate 10, display panel 10 include upper substrate 11, the lower substrate 12 being oppositely arranged with upper substrate 11 and are located at upper substrate 11 under
Liquid crystal layer 13 between substrate 12, upper substrate 11 are equipped with top electrode 111 in the side towards lower substrate 12, and lower substrate 12 is in direction
The side of upper substrate 11 is equipped with public electrode 121 and pixel electrode 122, by being applied between top electrode 111 and public electrode 121
Making alive can control display panel 10 to switch in wide viewing angle and narrow viewing angle.
Specifically, upper substrate 11 is color membrane substrates, and lower substrate 12 is array substrate, when the public electrode on lower substrate 12
121 provide a reference voltage, when the top electrode 111 on upper substrate 11 provides a bias voltage, upper substrate 11 and lower base
Plate 12 will produce a vertical electric field so that the long axis of the liquid crystal molecule in the first liquid crystal layer 13 is substantially flat with upper substrate 11
Row, the picture visual angle reduction of display panel 10 at this time, display panel 10 is narrow viewing angle pattern, from the side of liquid crystal display device
Face sees that contrast reduces and visual angle narrows, and liquid crystal display device is also narrow viewing angle pattern.
Further, backlight module 30 includes light source 34 and light guide plate 32, and the light emission side of light guide plate 32 is equipped with prismatic lens 31,
Backlight module 30 further includes polymer liquid crystal box 40, and polymer liquid crystal box 40 is arranged on prismatic lens 31, light guide plate 32 it is another
Side is additionally provided with package frame 33, and polymer liquid crystal box 40 includes the first electrode 211 being oppositely arranged and second electrode 221 and setting
Multiple barricades 233 between first electrode 211 and second electrode 221, multiple barricades 233 are electric by first electrode 211 and second
Space between pole 221 is separated to form multiple closed chambers 230, and each closed chamber 230 is equipped with polymer liquid crystal 41, first electrode
211 for pattern structure and include multiple mutually insulateds electrode block 212, each electrode block 212 with closed chamber 230 relatively
It answers, first electrode 211 makes for applying voltage in closed chamber corresponding with each electrode block 212 230 with second electrode 221
Polymer liquid crystal 41 be formed as light transmission state or shading status, to change light that light source 34 is sent out by polymer liquid crystal
Shooting angle after box 40.In its natural state, the liquid crystal molecule inside polymer liquid crystal irregularly arranges, liquid-crystal refractive-index
Lower than the refractive index of outside polymer, incident light is scattered in polymeric layer, is creamy white, i.e., opaque shading status.
After energization, the liquid crystal molecule of Dispersed precipitate becomes orienting regular arrangement from random arrangement rapidly, makes the refractive index of liquid crystal
Equal with the refractive index of polymer, incident light can pass through completely, form transparent light transmission state, shading and light transmission two states
It can arbitrarily be converted within moment.
Specifically, polymer liquid crystal box 40 further includes first substrate 21 and second substrate 22, and first substrate 21 is close to display
Panel 10, for second substrate 22 close to light guide plate 32, one towards second substrate 22 in first substrate 21 is arranged in first electrode 211
Side, second electrode 221 are arranged in second substrate 22 towards the side of first substrate 21.
Further, second electrode 221 is entire planar structure, and in other embodiments, second electrode 221 can be
Strip structure.
Further, polymer liquid crystal box 40 includes driving circuit 24, and driving circuit 24 is used for 212 He of multiple electrodes block
Second electrode 221 applies voltage.
Specifically, polymer liquid crystal box further includes first substrate 21 and second substrate 22, and first electrode 211 is arranged first
On substrate 21, second electrode 221 is arranged on second substrate 22, and it is (not shown that a plurality of control line is provided on first substrate 21
Go out), each electrode block 212 is electrically connected with a corresponding control line, and every control line is connected with driving circuit 24.
As shown in fig. 7, when needing liquid crystal display device wide viewing angle to show, controls the display panel 10 and shown in wide viewing angle
Pattern, applying voltage to first electrode 211 and second electrode 221 makes the voltage between each electrode block 212 and second electrode 221
When difference is more than preset value, the polymer liquid crystal 41 in closed chamber corresponding with each electrode block 212 230 is light transmission state,
At this point, backlight module 30 is wide shooting angle.
As shown in figure 8, when needing liquid crystal display device narrow viewing angle to show, controls the display panel 10 and shown in narrow viewing angle
Pattern, applying voltage to first electrode 211 and second electrode 221 makes between some of electrode blocks 212 and second electrode 221
Voltage difference when being zero, the polymer liquid crystal 41 in closed chamber corresponding with some of electrode blocks 212 230 is shading
State, the polymer liquid crystal 41 in closed chamber corresponding with remaining remaining electrode block 212 230 is light transmission state, is made more
Row closed chamber 230 is alternately in shading status and light transmission state, forms shutter, the larger light of angle is by shading at this time
The closed chamber 230 of state is blocked, and the smaller light of angle is projected from the closed chamber 230 of light transmission state, and backlight module 30 is narrow
Shooting angle.
However, the present invention is not limited thereto please join Fig. 9 in other embodiments, and first electrode 211 is arranged in 22 court of second substrate
To the side of first substrate 21, second electrode 221 is arranged in first substrate 21 towards the side of second substrate 22, second substrate 22
On be provided with a plurality of control line, each electrode block 212 is electrically connected with a corresponding control line, and every control line is and driving circuit
24 are connected.I.e. first electrode 211 is closer to light guide plate 32, and second electrode 221 is closer to display panel 10.
As shown in Figure 10, in the present embodiment, since first electrode 211 includes multiple electrodes block 212, and each electrode block
212 correspond to a closed chamber 230, therefore can change the light transmission state and shading status of arbitrary closed chamber 230, to adjust difference
Shooting angle, such as closed chamber 230 per adjacent two row shading status is spaced the closed chamber 230 of a row light transmission state, or every
The closed chamber 230 of adjacent two row shading status is spaced the closed chamber 230 of multiple row light transmission state.
As shown in figure 11, in other embodiments, part closed chamber 230 can be preset for shading, part is closed
Chamber 230 is used for light transmission, and the width of the closed chamber 230 for shading is less than the width of the closed chamber 230 for light transmission, it is ensured that
It shows the complete of information, improves the display effect of liquid crystal display device.
When the liquid crystal display device of the present embodiment is in narrow viewing angle pattern, 10 picture visual angle of display panel reduces, and makes
Light reduces in the shooting angle after polymer liquid crystal box 40, achievees the effect that reduce 30 angle of divergence of backlight module, solve
When liquid crystal display device is in narrow viewing angle, there is the high problem of side light leakage, brightness because backlight module 30 is wide shooting angle,
Improve the display effect of liquid crystal display device.
The above embodiment is the embodiment of the present invention, is not intended to limit implementation and the interest field of the present invention, all
The equivalence changes and modification that the content described in the apllied protection domain of patent is made according to the present invention, should all be included in this hair
In bright scope of patent protection.
Claims (10)
1. a kind of backlight module (30), including light source (34) and light guide plate (32), which is characterized in that the backlight module (30) also wraps
Electrowetting device (20) is included, which is arranged the light emission side in the light guide plate (32), the Electrowetting device (20)
Including the first electrode (211) being oppositely arranged and second electrode (221) and it is set to the first electrode (211) and second electricity
Multiple barricades (233) between pole (221), multiple barricade (233) is by the first electrode (211) and the second electrode (221)
Between space be separated to form multiple closed chambers (230), each closed chamber (230) is equipped with hydrophobic dielectric layer (222), polar solvent
(232) and non-polar solution (231), the first electrode (211) and the second electrode (221) for apply voltage make it is each closed
Polar solvent (232) and non-polar solution (231) in chamber (230) are formed as astigmatism state or spot condition, to change the light
The light that source (34) is sent out is in the shooting angle after the Electrowetting device (20).
2. backlight module (30) according to claim 1, which is characterized in that the first electrode (211) and the second electrode
(221) it is entire planar structure.
3. a kind of backlight module (30), including light source (34) and light guide plate (32), which is characterized in that the backlight module (30) also wraps
Polymer liquid crystal box (40) is included, which is arranged the light emission side in the light guide plate (32), the polymer liquid crystal
Box (40) includes the first electrode (211) being oppositely arranged and second electrode (221) and is set to the first electrode (211) and is somebody's turn to do
Multiple barricades (233) between second electrode (221), multiple barricade (233) is by the first electrode (211) and the second electrode
(221) space between is separated to form multiple closed chambers (230), and each closed chamber (230) is equipped with polymer liquid crystal (41), this
One electrode (211) be pattern structure and include multiple mutually insulateds electrode block (212), each electrode block (212) with one
Closed chamber (230) is corresponding, which makes and each electrode with the second electrode (221) for applying voltage
Polymer liquid crystal (41) in block (212) corresponding closed chamber (230) is formed as light transmission state or shading status, is somebody's turn to do with changing
The light that light source (34) is sent out is in the shooting angle after the polymer liquid crystal box (40).
4. backlight module (30) according to claim 3, which is characterized in that the second electrode (221) is entire planar
Structure.
5. a kind of liquid crystal display device, which is characterized in that including display panel (10) and as described in any one of Claims 1-4
Backlight module (30), which includes upper substrate (11), the lower substrate that is oppositely arranged with the upper substrate (11)
(12) and the liquid crystal layer (13) between the upper substrate (11) and the lower substrate (12).
6. liquid crystal display device according to claim 5, which is characterized in that the upper substrate (11) is towards the lower substrate
(12) side is equipped with top electrode (111), which is equipped with public electrode in the side towards the upper substrate (11)
(121) and pixel electrode (122).
7. a kind of driving method of driving such as claim 5 to 6 any one of them liquid crystal display device, which is characterized in that should
Driving method includes：
When needing the liquid crystal display device wide viewing angle to show, it is wide shooting angle to control the backlight module (30)；
When needing the liquid crystal display device narrow viewing angle to show, it is narrow shooting angle to control the backlight module (30).
8. the driving method of liquid crystal display device according to claim 7, which is characterized in that the driving method includes：
When needing the liquid crystal display device wide viewing angle to show, controls the display panel (10) and be in wide viewing angle display pattern；
When needing the liquid crystal display device narrow viewing angle to show, controls the display panel (10) and be in narrow viewing angle display pattern.
9. the driving method of liquid crystal display device according to claim 7, which is characterized in that if the backlight module (30) wraps
Electrowetting device (20) is included, then makes the first electrode when applying voltage to the first electrode (211) and the second electrode (221)
(211) when the voltage difference between the second electrode (221) is zero, polar solvent (232) in each closed chamber (230) and non-
Polar solvent (231) is formed as astigmatism state, which is wide shooting angle；When to the first electrode (211) and
The second electrode (221), which applies voltage, makes the voltage difference between the first electrode (211) and the second electrode (221) more than default
When value, polar solvent (232) and non-polar solution (231) in each closed chamber (230) are formed as spot condition, the backlight mould
Group (30) is narrow shooting angle.
10. the driving method of liquid crystal display device according to claim 7, which is characterized in that if the backlight module (30)
Including polymer liquid crystal box (40), then make each electrode when applying voltage to the first electrode (211) and the second electrode (221)
It is corresponding with each electrode block (212) close when voltage difference between block (212) and the second electrode (221) is more than preset value
Polymer liquid crystal (41) in closed chamber (230) is light transmission state, which is wide shooting angle；When to this first
Electrode (211) and the second electrode (221) apply voltage make some of electrode blocks (212) and the second electrode (221) it
Between voltage difference when being zero, the polymer liquid crystal in closed chamber (230) corresponding with some of electrode block (212)
(41) it is shading status, the polymer liquid crystal (41) in closed chamber (230) corresponding with remaining remaining electrode block (212)
It is light transmission state, which is narrow shooting angle.
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