CN105116600B - Liquid crystal display and display device - Google Patents
Liquid crystal display and display device Download PDFInfo
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- CN105116600B CN105116600B CN201510590056.1A CN201510590056A CN105116600B CN 105116600 B CN105116600 B CN 105116600B CN 201510590056 A CN201510590056 A CN 201510590056A CN 105116600 B CN105116600 B CN 105116600B
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- polarizer
- liquid crystal
- crystal display
- light
- wave plate
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
-
- 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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133634—Birefringent elements, e.g. for optical compensation the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis
-
- 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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
A kind of liquid crystal display, including liquid crystal cell, polarizer and structure of polarized light, the liquid crystal cell has the first side and second side being oppositely arranged, the polarizer is arranged at the first side of the liquid crystal cell, the structure of polarized light is arranged at the second side of the liquid crystal cell, the structure of polarized light includes polylith polarizer and at least one block of half-wave plate, one block of half-wave plate is provided between two pieces of adjacent polarizers, and the absorption axiss of the polarizer of the first side of the liquid crystal cell and the absorption axiss of each polarizer of the structure of polarized light are at an angle to each other, the absorption axiss of the polarizer of the first side of the liquid crystal cell and the optical axis of the half-wave plate of the structure of polarized light are at an angle to each other.The liquid crystal display of the present invention can reduce light leak, and can improve contrast.The invention further relates to a kind of display devices for containing the liquid crystal display.
Description
Technical field
The present invention relates to liquid crystal display device technical field, more particularly to a kind of liquid crystal display and display device.
Background technology
Liquid crystal display device (LCD, Liquid Crystal Display) have fuselage is thin, power saving, penetrate etc. without good fortune it is numerous
Advantage is widely used.Liquid crystal display device on existing market is largely backlight liquid crystal display device, bag
Include liquid crystal display and backlight module (backlight module).Liquid crystal display is arranged on including liquid crystal cell above and below liquid crystal cell
The polarizer of both sides.The operation principle of liquid crystal display is to apply voltage to liquid crystal cell liquid crystal molecule to be controlled to deflect direction, will
The light of backlight module reflects generation picture.
The orthogonal setting of polarizer of both sides above and below liquid crystal cell is generally arranged at, i.e., the angle of the absorption axiss of two pieces polarizers is
90°.When liquid crystal display shows black state, when the light sent by the light source of backlight module passes through first piece of polarizer, natural light
As linearly polarized light, do not change (such as can be by applying alive side in deflection direction when this linearly polarized light passes through liquid crystal cell
Formula changes the orientation of liquid crystal molecule and then the deflection direction of linearly polarized light is made not change), by second piece of polarizer
When linearly polarized light exit direction parallel to the absorption axiss of second piece of polarizer, this linearly polarized light inhaled by second piece of polarizer
It receives.But due to the influence of real material characteristic, parallel to the absorption axiss of first piece of polarizer light appoint have only a few from this partially
Tabula rasa penetrates, and has only a few to be penetrated from this polarizer parallel to the light times of the absorption axiss of second piece of polarizer, therefore existing
Liquid crystal display the phenomenon that being inevitably present with light leak when showing black state (cause the black state of liquid crystal display not black),
So that the contrast of liquid crystal display is relatively low.
The content of the invention
It is an object of the present invention to provide a kind of liquid crystal displays, can reduce light leak, and can improve contrast.
Another object of the present invention is to provide a kind of display devices for containing the liquid crystal display, can reduce leakage
Light, and contrast can be improved.
The present invention, which solves its technical problem, to be realized using following technical solution.
First aspect：The embodiment of the present invention provides a kind of liquid crystal display, including liquid crystal cell, polarizer and structure of polarized light,
Liquid crystal cell has the first side and second side being oppositely arranged, and polarizer is arranged at the first side of liquid crystal cell, structure of polarized light
The second side of liquid crystal cell is arranged at, structure of polarized light includes polylith polarizer and at least one block of half-wave plate, adjacent two blocks of polarisations
One block of half-wave plate, and each polarizer of the absorption axiss of the polarizer of the first side of liquid crystal cell and structure of polarized light are provided between plate
Absorption axiss it is at an angle to each other, the optical axis of the absorption axiss of the polarizer of the first side of liquid crystal cell and the half-wave plate of structure of polarized light is mutually
Angle.
In the preferred embodiment, above-mentioned structure of polarized light includes two pieces of polarizers and one block of half-wave plate, defines liquid
The polarizer of the first side of brilliant box is the first polarizer, and two pieces of polarizers for defining structure of polarized light are the second polarizer and the 3rd
Polarizer, the second polarizer are arranged on the second side of liquid crystal cell, and half-wave plate is arranged on the second polarizer, and the 3rd polarizer is set
It puts on half-wave plate.
In the preferred embodiment, the absorption axiss of above-mentioned first polarizer and the absorption axiss of the second polarizer are mutually
90 °, the absorption axiss of the first polarizer and the absorption axiss of the 3rd polarizer are mutually at 45 °, the absorption axiss and half-wave plate of the first polarizer
Optical axis be mutually 157.5 °.
In the preferred embodiment, the absorption axiss of above-mentioned first polarizer and the absorption axiss of the second polarizer are mutually
90 °, the absorption axiss of the first polarizer and the absorption axiss of the 3rd polarizer are mutually 135 °, the absorption axiss and half-wave plate of the first polarizer
Optical axis be mutually 22.5 °.
In the preferred embodiment, above-mentioned structure of polarized light includes three pieces of polarizers and two blocks of half-wave plates, defines liquid
The polarizer of the first side of brilliant box is the first polarizer, defines three pieces of polarizers of structure of polarized light as the second polarizer, the 3rd
Polarizer and the 4th polarizer define two blocks of half-wave plates of structure of polarized light as the first half-wave plate and the second half-wave plate, the second polarisation
Plate is arranged in the second side of liquid crystal cell, the second polarizer, the first half-wave plate, the 3rd polarizer, the second half-wave plate and the 4th
Polarizer stacks gradually connection.
In the preferred embodiment, the absorption axiss of above-mentioned first polarizer and the absorption axiss of the second polarizer are mutually
90 °, the absorption axiss of the first polarizer and the absorption axiss of the 3rd polarizer are mutually at 45 °, and the absorption axiss of the first polarizer are inclined with the 4th
The absorption axiss of tabula rasa are mutually 135 °, and the absorption axiss of the first polarizer and the optical axis of the first half-wave plate are mutually 157.5 °, the first polarisation
The absorption axiss of plate and the optical axis of the second half-wave plate are mutually in 90 °.
In the preferred embodiment, the polarizer of above-mentioned liquid crystal display includes polarizer and is arranged on polarizer
First compensation film of upper and lower both sides and the second compensation film.
Second aspect, the embodiment of the present invention additionally provide a kind of display device, include above-mentioned liquid crystal display.
The first side of the liquid crystal cell of the liquid crystal display of the present invention is equipped with polarizer, and the second side of liquid crystal cell is equipped with partially
Photo structure, structure of polarized light have polylith polarizer and at least one block of half-wave plate, are set between adjacent two pieces of polarizers of structure of polarized light
It is equipped with one block of half-wave plate, and the absorption axiss of each polarizer of the absorption axiss of the polarizer of the first side of liquid crystal cell and structure of polarized light
At an angle to each other, the optical axis of the absorption axiss of the polarizer of the first side of liquid crystal cell and the half-wave plate of structure of polarized light is at an angle to each other.When
When liquid crystal display shows black state, during polarizer by the first side of liquid crystal cell of the light that is sent by backlight module, natural light
As linearly polarized light (light i.e. perpendicular to the absorption axiss of this polarizer can pass through this polarizer as linearly polarized light, but parallel to
The light of the absorption axiss of this polarizer, which is appointed, has only a few from this polarizer transmission), this linearly polarized light deflects direction when passing through liquid crystal cell
Do not change, by structure of polarized light polarizer when linearly polarized light exit direction parallel to the second polarizer absorption
Axis, this linearly polarized light by structure of polarized light polarizer absorb (but parallel to this polarizer absorption axiss light appoint have only a few from
This polarizer transmission), therefore a small number of light shapes appeared from the polarizer of first side and the polarizer of structure of polarized light of liquid crystal cell
Into natural light, when natural light passes through half-wave plate, half-wave plate does not generate natural light deflection characteristic, therefore natural light passes through polarisation
Polarisation occurs during another polarizer of structure, reduces light leak during the black state of liquid crystal display, and improves liquid crystal display
Contrast.
Above description 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 above and other objects, features and advantages of the present invention can
It is clearer and more comprehensible, it is special below to lift preferred embodiment, and coordinate attached drawing, it is described in detail.
Description of the drawings
Fig. 1 is the schematic cross-sectional view of the display device of the present invention.
Fig. 2 a are the schematic cross-sectional views of the liquid crystal display of first embodiment of the invention.
Fig. 2 b be the polarizer of first embodiment of the invention absorption axiss and half-wave plate optical axis setting direction schematic diagram.
Fig. 3 a are the schematic cross-sectional views of the liquid crystal display of second embodiment of the invention.
Fig. 3 b be the polarizer of second embodiment of the invention absorption axiss and half-wave plate optical axis setting direction schematic diagram.
Fig. 4 a are the schematic cross-sectional views of the liquid crystal display of third embodiment of the invention.
Fig. 4 b be the polarizer of third embodiment of the invention absorption axiss and half-wave plate optical axis setting direction schematic diagram.
Fig. 5 a are the schematic diagrames of existing liquid crystal display strabismus light leak.
Fig. 5 b are the schematic diagrames of the liquid crystal display strabismus light leak of first embodiment of the invention.
Fig. 5 c are the schematic diagrames of the liquid crystal display strabismus light leak of second embodiment of the invention.
Fig. 5 d are the schematic diagrames of the liquid crystal display strabismus light leak of third embodiment of the invention.
Fig. 6 a are the viewing angle of the liquid crystal display of first embodiment of the invention and the coordinate diagram of contrast.
Fig. 6 b are the viewing angle of the liquid crystal display of second embodiment of the invention and the coordinate diagram of contrast.
Fig. 6 c are the viewing angle of the liquid crystal display of third embodiment of the invention and the coordinate diagram of contrast.
Fig. 7 a are the colourity schematic diagrames of existing colored optical filtering substrates.
Fig. 7 b are the colourity schematic diagrames of the colored optical filtering substrates of first embodiment of the invention.
Fig. 7 c are the colourity schematic diagrames of the colored optical filtering substrates of second embodiment of the invention.
Fig. 7 d are the colourity schematic diagrames of the colored optical filtering substrates of third embodiment of the invention.
Specific embodiment
Further to illustrate the present invention to reach the technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Attached drawing and preferred embodiment, to the specific embodiment, structure, spy according to liquid crystal display proposed by the present invention and display device
Sign and its effect are as follows in detail：
For the present invention foregoing and other technology contents, feature and effect, in following cooperation with reference to the preferable reality of schema
Applying in the detailed description of example can clearly appear from.By the explanation of specific embodiment, when predetermined mesh can be reached to the present invention
The technological means taken and effect be able to more deeply and it is specific understand, however institute's accompanying drawings are only to provide with reference to saying
It is bright to be used, not it is used for being any limitation as the present invention.
Fig. 1 is the schematic cross-sectional view of the display device of the present invention.As shown in Figure 1, in this example it is shown that device
100 include front frame 110, backboard 120, glue frame 130, liquid crystal display 140 and backlight module 150.Front frame 110 is blocked with glue frame 130
It closes, and glue frame 130 is set around backboard 120, and glue frame 130 is arranged between front frame 110 and backboard 120.Liquid crystal display 140
It is arranged in glue frame 130, backlight module 150 is arranged on backboard 120.
Liquid crystal display 140 includes liquid crystal cell 142, polarizer 143 and structure of polarized light 144a, 144b, 144c, liquid crystal cell
142 there is the first side 101 being oppositely arranged and second side 102, polarizer 143 to be arranged on the first side of liquid crystal cell 142
101, structure of polarized light 144a, 144b, 144c are arranged on the second side 102 of liquid crystal cell 142.In the present embodiment, structure of polarized light
144a, 144b, 144c include polylith polarizer and at least one block of half-wave plate.It is noted that the first side of liquid crystal cell 142
101 polarizer 143 and each polarizer of structure of polarized light 144a, 144b, 144c include polarizer and are arranged on polarizer
First compensation film of upper and lower both sides and the second compensation film, in the present embodiment, the first compensation film and the second compensation film are by three acetic acid
Cellulose (Triacetyl Celluose；TAC) formed, but be not limited thereto.
Backlight module 150 includes light guide plate 152, light source 154 and diffusion sheet 156.
Fig. 2 a are the schematic cross-sectional views of the liquid crystal display of first embodiment of the invention.As shown in Figure 2 a, in this reality
It applies in example, structure of polarized light 144a has two pieces of polarizers 145a, 146a and one piece of half-wave plate 147a.Define the of liquid crystal cell 142
The polarizer 143 of one side 101 is the first polarizer 143a, and two pieces of polarizers 145a, 146a for defining structure of polarized light 144a are
Second polarizer 145a and the 3rd polarizer 146a.First polarizer 143a is arranged on the first side 101 of liquid crystal cell 142, the
Two polarizer 145a are arranged in the second side 102 of liquid crystal cell 142, and half-wave plate 147a is arranged on the second polarizer 145a,
And the 3rd polarizer 146a be arranged on half-wave plate 147a.It establishes rectangular coordinate system, hangs down in a plane and mutually at definition
Straight X-axis and Y-axis and the Z axis perpendicular to X-axis and Y-axis, and liquid crystal display 140 is made to be set parallel to X-axis and Y-axis, even if
First polarizer 143a, the second polarizer 145a, the 3rd polarizer 146a and half-wave plate 147a are parallel to X-axis and Y-axis.Definition the
The absorption axiss of one polarizer 143a are not limited thereto 1. parallel to X-axis, also can define the absorption axiss of the first polarizer 143a
1. parallel to Y-axis.
Fig. 2 b be the polarizer of first embodiment of the invention absorption axiss and half-wave plate optical axis setting direction schematic diagram.
As shown in Figure 2 b, in the present embodiment, the absorption axiss of the first polarizer 143a are 1. 2. mutual with the absorption axiss of the second polarizer 145a
(namely the absorption axiss of the second polarizer 145a are 2. parallel to Y-axis) in 90 °, the absorption axiss of the first polarizer 143a are 1. inclined with the 3rd
The absorption axiss of tabula rasa 146a are 4. mutual (namely 4. the absorption axiss of the 3rd polarizer 145a are 45 ° with the angle of X-axis) at 45 °, and first
The absorption axiss of polarizer 143a be 1. 3. mutually with the optical axis of half-wave plate 147a 157.5 ° (namely the optical axis of half-wave plate 147a 3. with X
The angle of axis is 157.5 °).Therefore when liquid crystal display 140 shows white state, light-transmissive structure of polarized light 144a；Work as liquid crystal
When showing that device 140 shows black state, light is absorbed by structure of polarized light 144a；Specifically：
When liquid crystal display 140 shows white state, the light sent by the light source 154 of backlight module 150 passes through along Z-direction
During the first polarizer 143a, natural light becomes linearly polarized light, and deflection direction changes when this linearly polarized light passes through liquid crystal cell 142
Become, by the second polarizer 145a time exit direction perpendicular to the second polarizer 145a absorption axiss 2., therefore linear polarization
Light is penetrated from the second polarizer 145a and directive half-wave plate 147a, the optical axis line that 3. angle is 22.5 ° with half-wave plate 147a
Polarised light (i.e. by the linearly polarized light after half-wave plate 147a and passes through half-wave plate by being rotated by 45 ° after half-wave plate 147a
The angle of linearly polarized light before 147a is 45 °), it is just 4. vertical with the absorption axiss of the 3rd polarizer 146a, therefore linear polarization
Light by completely through.
When liquid crystal display 140 shows black state, the light sent by the light source 154 of backlight module 150 passes through along Z-direction
During the first polarizer 143a, natural light becomes linearly polarized light, and (the absorption axiss light 1. perpendicular to the first polarizer 143a can pass through
First polarizer 143a becomes linearly polarized light, but appoints parallel to the absorption axiss light 1. of the first polarizer 143a and have only a few from the
One polarizer 143a transmissions), deflection direction, which does not change, when this linearly polarized light passes through liquid crystal cell 142 (such as can pass through application
The mode of voltage changes the orientation of liquid crystal molecule and then the deflection direction of linearly polarized light is made not change), by second
The exit direction of linearly polarized light during polarizer 145a is parallel to the absorption axiss of the second polarizer 145a, this linearly polarized light is by second
Polarizer 145a, which absorbs, (but to be appointed parallel to the absorption axiss light 2. of the second polarizer 145a and has only a few from the second polarizer 145a
Through), therefore a small number of light appeared from the first polarizer 143a and the second polarizer 145a form natural light, when natural light is passed through
During half-wave plate 147a, half-wave plate 147a does not generate natural light deflection characteristic, therefore when natural light passes through the 3rd polarizer 146a
Generation polarisation reduces brightness during 140 black state of liquid crystal display.
Fig. 3 a are the schematic cross-sectional views of the liquid crystal display of second embodiment of the invention.As shown in Figure 3a, in this reality
It applies in example, structure of polarized light 144b has two pieces of polarizers 145b, 146b and one piece of half-wave plate 147b.Define the of liquid crystal cell 142
The polarizer 143 of one side 101 is the first polarizer 143b, and two pieces of polarizers 145b, 146b for defining structure of polarized light 144b are
Second polarizer 145b and the 3rd polarizer 146b.First polarizer 143b is arranged on the first side 101 of liquid crystal cell 142, the
Two polarizer 145b are arranged in the second side 102 of liquid crystal cell 142, and half-wave plate 147b is arranged on the second polarizer 145b,
And the 3rd polarizer 146b be arranged on half-wave plate 147b.It establishes rectangular coordinate system, hangs down in a plane and mutually at definition
Straight X-axis and Y-axis and the Z axis perpendicular to X-axis and Y-axis, and liquid crystal display 140 is made to be set parallel to X-axis and Y-axis, even if
First polarizer 143b, the second polarizer 145b, the 3rd polarizer 146b and half-wave plate 147b are parallel to X-axis and Y-axis.Definition the
The absorption axiss of one polarizer 143b are not limited thereto 1. parallel to X-axis, also can define the absorption axiss of the first polarizer 143b
1. parallel to Y-axis.
Fig. 3 b be the polarizer of second embodiment of the invention absorption axiss and half-wave plate optical axis setting direction schematic diagram.
As shown in Figure 3b, in the present embodiment, the absorption axiss of the first polarizer 143b are 1. 2. mutual with the absorption axiss of the second polarizer 145b
(namely the absorption axiss of the second polarizer 145b are 2. parallel to Y-axis) in 90 °, the absorption axiss of the first polarizer 143b are 1. inclined with the 3rd
4. the absorption axiss of tabula rasa 146b are mutually 135 ° (namely 4. the absorption axiss of the 3rd polarizer 146b are 135 ° with the angle of X-axis), the
The absorption axiss of one polarizer 143b be 1. 3. mutually with the optical axis of half-wave plate 147b 22.5 ° (namely the optical axis of half-wave plate 147b 3. with X
The angle of axis is 22.5 °).Therefore when liquid crystal display 140 shows white state, light-transmissive structure of polarized light 144b；Work as liquid crystal
When showing that device 140 shows black state, light is absorbed by structure of polarized light 144b；Specifically：
When liquid crystal display 140 shows white state, the light sent by the light source 154 of backlight module 150 passes through along Z-direction
During the first polarizer 143b, natural light becomes linearly polarized light, and deflection direction changes when this first polarised light passes through liquid crystal cell 142
Become, by the second polarizer 145b time exit direction perpendicular to the second polarizer 145b absorption axiss 2., therefore linear polarization
Light is penetrated from the second polarizer 145b and directive half-wave plate 147b, the optical axis line that 3. angle is 22.5 ° with half-wave plate 147b
Polarised light (i.e. by the linearly polarized light after half-wave plate 147b and passes through half-wave plate by being rotated by 45 ° after half-wave plate 147b
The angle of linear polarization before 147b is 45 °), it is just 4. vertical with the absorption axiss of the 3rd polarizer 146b, therefore linearly polarized light
By completely through.
When liquid crystal display 140 shows black state, the light sent by the light source 154 of backlight module 150 passes through along Z-direction
During the first polarizer 143b, natural light becomes linearly polarized light, and (the absorption axiss light 1. perpendicular to the first polarizer 143b can pass through
First polarizer 143b becomes linearly polarized light, but appoints parallel to the absorption axiss light 1. of the first polarizer 143b and have only a few from the
One polarizer 143b transmissions), deflection direction, which does not change, when this linearly polarized light passes through liquid crystal cell 142 (such as can pass through application
The mode of voltage changes the orientation of liquid crystal molecule and then the deflection direction of linearly polarized light is made not change), by second
The exit direction of linearly polarized light during polarizer 145b parallel to the second polarizer 145b absorption axiss 2., this linearly polarized light is by
Two polarizer 145b, which absorb, (but to be appointed parallel to the absorption axiss light 2. of the second polarizer 145b and has only a few from the second polarizer
145b transmissions), therefore a small number of light appeared from the first polarizer 143b and the second polarizer 145b form natural light, work as natural light
During by half-wave plate 147b, half-wave plate 147b does not generate natural light deflection characteristic, therefore natural light passes through the 3rd polarizer
Polarisation occurs during 146b, reduces brightness during 140 black state of liquid crystal display.
Fig. 4 a are the schematic cross-sectional views of the liquid crystal display of third embodiment of the invention.As shown in fig. 4 a, in this reality
It applies in example, structure of polarized light 144c has three pieces of polarizers 145c, 146c, 147c and two pieces of half-wave plates 148c, 149c.Define liquid crystal
The polarizer 143 of the first side 101 of box 142 is the first polarizer 143c, defines three pieces of polarizers of structure of polarized light 144c
145c, 146c, 147c are the second polarizer 145c, the 3rd polarizer 146c and the 4th polarizer 147c, define structure of polarized light
Two pieces of half-wave plates 148c, 149c of 144c are the first half-wave plate 148c and the second half-wave plate 149c.First polarizer 143c is set
In the first side 101 of liquid crystal cell 142, the second polarizer 145c is arranged in the second side 102 of liquid crystal cell 142, and second
Polarizer 145c, the first half-wave plate 148c, the 3rd polarizer 146c, the second half-wave plate 149c and the 4th polarizer 147c heap successively
(i.e. the first half-wave plate 148c is arranged on the second polarizer 145c, and the 3rd polarizer 146c is arranged on the first half-wave plate for folded connection
On 148c, the second half-wave plate 149c is arranged between the 3rd polarizer 146c and the 4th polarizer 147c).Establish rectangular co-ordinate
System at definition in a plane and orthogonal X-axis and Y-axis and the Z axis perpendicular to X-axis and Y-axis, and makes liquid crystal
Show that device 140 is set parallel to X-axis and Y-axis, even if three pieces of polarizer 145c of the first polarizer 143c and structure of polarized light 144c,
146c, 147c and two pieces of half-wave plates 148c, 149c are parallel to X-axis and Y-axis.The absorption axiss for defining the first polarizer 143c are 1. parallel
It in X-axis, but is not limited thereto, also can define the absorption axiss of the first polarizer 143c 1. parallel to Y-axis.
Fig. 4 b be the polarizer of third embodiment of the invention absorption axiss and half-wave plate optical axis setting direction schematic diagram.
As shown in Figure 4 b, in the present embodiment, the absorption axiss of the first polarizer 143c are 1. 2. mutual with the absorption axiss of the second polarizer 145c
(namely the absorption axiss of the second polarizer 145c are 2. parallel to Y-axis) in 90 °, the absorption axiss of the first polarizer 143c are 1. inclined with the 3rd
The absorption axiss of tabula rasa 146c are 4. mutual (namely 4. the absorption axiss of the 3rd polarizer 146c are 45 ° with the angle of X-axis) at 45 °, and first
1. 6. the absorption axiss of polarizer 143c are mutually 135 ° of (namely suctions of the 4th polarizer 147c with the absorption axiss of the 4th polarizer 147c
6. it is 135 ° with the angle of X-axis to receive axis), 3. the optical axis of the absorption axiss of the first polarizer 143c 1. with the first half-wave plate 148c is mutually
157.5 ° (namely 3. the optical axis of the first half-wave plate 148c is 157.5 ° with the angle of X-axis), the absorption axiss of the first polarizer 143c
1. with the optical axis of the second half-wave plate 149c, 5. mutually in 90 ° (namely angle of the optical axis of the second half-wave plate 149c 5. with X-axis is
90°).Therefore when liquid crystal display 140 shows white state, light-transmissive structure of polarized light 144c；When liquid crystal display 140 show it is black
During state, light is absorbed by structure of polarized light 144c；Specifically：
When liquid crystal display 140 shows white state, the light sent by the light source 154 of backlight module 150 passes through along Z-direction
During the first polarizer 143c, natural light becomes linearly polarized light, and deflection direction changes when this first polarised light passes through liquid crystal cell 142
Become, by the second polarizer 145c time exit direction perpendicular to the second polarizer 145c absorption axiss 2., therefore linear polarization
Light is through simultaneously directive the first half-wave plate 148c from the second polarizer 145c, and 3. angle is with the optical axis of the first half-wave plate 148c
22.5 ° of linearly polarized light is (inclined i.e. by the line after the first half-wave plate 148c by being rotated by 45 ° after the first half-wave plate 148c
Light shake with by the angle of the linearly polarized light optical axis before the first half-wave plate 148c being 3. 45 °), just with the 3rd polarizer 146c
Absorption axiss it is 4. vertical, therefore linearly polarized light is by completely through, the optical axis of this linearly polarized light and the second half-wave plate 149c 5. angle
For 45 °, by being rotated by 90 ° after the second half-wave plate 149c (i.e. by linearly polarized light after the second half-wave plate 149c with leading to
The angle for the linearly polarized light crossed after the second half-wave plate 149c is 90 °), just 6. the absorption axiss with the 4th polarizer 147c are hung down
Directly, thus linearly polarized light by completely through.
When liquid crystal display 140 shows black state, the light sent by the light source 154 of backlight module 150 passes through along Z-direction
During the first polarizer 143c, natural light becomes linearly polarized light, and (the absorption axiss light 1. perpendicular to the first polarizer 143c can pass through
First polarizer 143c becomes linearly polarized light, but appoints parallel to the absorption axiss light 1. of the first polarizer 143c and have only a few from the
One polarizer 143c transmissions), deflection direction, which does not change, when this linearly polarized light passes through liquid crystal cell 142 (such as can pass through application
The mode of voltage changes the orientation of liquid crystal molecule and then the deflection direction of linearly polarized light is made not change), by second
The exit direction of linearly polarized light during polarizer 145c parallel to the second polarizer 145c absorption axiss 2., this linearly polarized light is by
Two polarizer 145c, which absorb, (but to be appointed parallel to the absorption axiss light 2. of the second polarizer 145c and has only a few from the second polarizer
145c transmissions), therefore a small number of light appeared from the first polarizer 143c and the second polarizer 145c form natural light, work as natural light
During by the first half-wave plate 148c, the first half-wave plate 148c does not generate natural light deflection characteristic, therefore natural light passes through the 3rd
Polarisation occurs during polarizer 146c, and forms linearly polarized light, when the linearly polarized light of formation passes through the second half-wave plate 149c, with second
The optical axis of the half-wave plate 149c linearly polarized light that 5. angle is 45 ° is by being rotated by 90 ° (i.e. by after the second half-wave plate 149c
Linearly polarized light after two half-wave plate 149c is with being 90 ° by the polarised light angle before the second half-wave plate 149c), just with the
The absorption axiss of four polarizer 147c are 6. vertical, though not exclusively being absorbed by the 4th polarizer 147c, can reduce tilted direction and regard greatly
The brightness of the black state light leak at angle, Direction Contrast of improving the standard.
It is noted that the polarizer of the structure of polarized light of above-described embodiment quantity and half-wave plate quantity simply with
The mode of one preferred embodiment illustrates, and not the quantity of polarizer and the quantity of half-wave plate of structure of polarized light are limited
It is fixed.
Structure of polarized light 144a, 144b, 144c of the liquid crystal display 140 of the present invention can effectively reduce liquid crystal display
140 show light leakage phenomena during black state, promote the contrast of liquid crystal display 140, and show white state to liquid crystal display 140
When brightness influence it is small.The liquid crystal display 140 being exemplified below out in three embodiments of the present invention is showing black state and is showing
Brightness value and the present invention when brightness value when showing daytime shows black state with existing liquid crystal display and shows display on daytime
Three embodiments in liquid crystal display 140 strabismus light leak value and existing liquid crystal display strabismus light leak value：
Table 1
| Liquid crystal display | It is existing | First embodiment | Second embodiment | 3rd embodiment |
| White state brightness value | 40.8 | 39.3 | 39.3 | 37.6 |
| Black state brightness value | 0.036 | 0.024 | 0.024 | 0.023 |
| Center contrast | 1150 | 1617 | 1617 | 1621 |
| Angle of squint light leak value | 17.0 | 14.5 | 11.5 | 10.5 |
As shown in Table 1, brightness of the liquid crystal display 140 of the first embodiment of the present invention when showing white state is more existing
Brightness of the liquid crystal display when showing white state substantially reduces 3.7%, the liquid crystal display 140 of the second embodiment of the present invention
Brightness of the more existing liquid crystal display of brightness when showing white state when showing white state substantially reduces 3.7%, the present invention
3rd embodiment brightness more existing liquid crystal display of the liquid crystal display 140 when showing white state when showing white state
Brightness substantially reduces 8%, that is to say, that and the brightness of liquid crystal display 140 of the invention when showing white state is declined by less than 8%,
Therefore influence of the liquid crystal display 140 of the present invention when showing white state to brightness is smaller.The liquid of the first embodiment of the present invention
Brightness of brightness more existing liquid crystal display of the crystal display 140 when showing black state when showing black state substantially reduces
32%, the more existing liquid crystal display of brightness of the liquid crystal display 140 of the second embodiment of the present invention when showing black state exists
Show that brightness during black state substantially reduces 32%, the liquid crystal display 140 of the third embodiment of the present invention is when showing black state
Brightness of the more existing liquid crystal display of brightness when showing black state substantially reduce 35%, that is to say, that liquid crystal of the invention
Brightness of the display 140 when showing black state declines more than 30%, therefore the liquid crystal display 140 of the present invention is when showing black state
It is affected to brightness.Moreover, the center contrast of the liquid crystal display 140 of the present invention is the center of available liquid crystal display
1.4 times of contrast.
Fig. 5 a are the schematic diagrames of existing liquid crystal display strabismus light leak.Fig. 5 b are the liquid crystals of first embodiment of the invention
Show the schematic diagram of device strabismus light leak.Fig. 5 c are the schematic diagrames of the liquid crystal display strabismus light leak of second embodiment of the invention.Fig. 5 d
It is the schematic diagram of the liquid crystal display strabismus light leak of third embodiment of the invention.It refer to table 1 and Fig. 5 a to Fig. 5 d, angle of squint leakage
The size of light value is that shade is directly proportional to angle of squint, i.e. the light leak value of angle of squint is bigger, and the color of angle of squint is deeper in figure.
140 angle of squint light leak value of liquid crystal display in the first embodiment of the present invention compares existing liquid crystal display angle of squint light leak
Value has dropped 14%, and the 140 angle of squint light leak value of liquid crystal display in the second embodiment of the present invention compares existing liquid crystal
Show that device angle of squint light leak value has dropped 32%, the 140 angle of squint light leak value phase of liquid crystal display in the third embodiment of the present invention
More existing liquid crystal display angle of squint light leak value has dropped 38%.
Fig. 6 a are the viewing angle of the liquid crystal display of first embodiment of the invention and the coordinate diagram of contrast.Fig. 6 b are these
The viewing angle of the liquid crystal display of invention second embodiment and the coordinate diagram of contrast.Fig. 6 c are third embodiment of the invention
The viewing angle of liquid crystal display and the coordinate diagram of contrast.As shown in Fig. 6 a to Fig. 6 c, in horizontal and vertical direction, just
The liquid crystal display 140 of the present invention and available liquid crystal display, liquid crystal display of the invention are observed in the range of minus 20 ° of polarizing angles
Device 140 has higher contrast.Specifically, as shown in Figure 6 a, the liquid crystal display that a1 is the present invention is observed in vertical direction,
The coordinate diagram of the contrast size of different polarizing angles；The liquid crystal display that c1 is the present invention is being observed in the horizontal direction, not homopolarity
Change the contrast size coordinate diagram at angle；B1 is that existing liquid crystal display is observed in vertical direction, the contrast of different polarizing angles
The coordinate diagram of size；D1 is that existing liquid crystal display is observed in the horizontal direction, the coordinate of the contrast size of different polarizing angles
Figure.As shown in Figure 6 b, the liquid crystal display that a2 is the present invention is observed in vertical direction, the seat of the contrast size of different polarizing angles
It marks on a map；The liquid crystal display that c2 is the present invention is observed in the horizontal direction, the coordinate diagram of the contrast size of different polarizing angles；B2 is
Existing liquid crystal display is observed in vertical direction, the coordinate diagram of the contrast size of different polarizing angles；D2 is existing liquid crystal
Display is observed in the horizontal direction, the coordinate diagram of the contrast size of different polarizing angles.As fig. 6 c, a3 is the liquid of the present invention
Crystal display is observed in vertical direction, the coordinate diagram of the contrast size of different polarizing angles；C3 is the liquid crystal display of the present invention
It observes in the horizontal direction, the coordinate diagram of the contrast size of different polarizing angles；B3 is existing liquid crystal display in vertical direction
Observation, the coordinate diagram of the contrast size of different polarizing angles；D3 is that existing liquid crystal display is observed in the horizontal direction, not homopolarity
Change the coordinate diagram of the contrast size at angle.
Fig. 7 a are the CIE 1931-XYZ chromaticity coordinate schematic diagrames of existing display.Fig. 7 b are first embodiment of the invention
Colourity schematic diagram.Fig. 7 c are the colourity schematic diagrames of second embodiment of the invention.Fig. 7 d are the colourity of third embodiment of the invention
Schematic diagram.As shown in Figure 7 a to 7 d, liquid crystal display 140 of the invention adds to promote the structure of polarized light of contrast
144a, 144b, 144c, this structure of polarized light 144a, 144b, 144c not only show liquid crystal display 140 brightness shadow during white state
It rings small and can effectively reduce light leak when liquid crystal display 140 shows black state, improve contrast, and satisfy to the color of display
It is influenced with degree smaller.The white light value of Fig. 7 a abscissas is 0.310, and the white light value of ordinate is 0.345, and color saturation is
70.7%；The white light value of Fig. 7 b abscissas is 0.321, and the white light value of ordinate is 0.365, color saturation 70.5%；Fig. 7 c
The white light value of abscissa is 0.321, and the white light value of ordinate is 0.366, color saturation 70.5%；The white light of Fig. 7 d abscissas
It is worth for 0.334, the white light value of ordinate is 0.396, color saturation 69.9%.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, but the present invention is not limited to above-mentioned implementations
Detail in mode within the scope of the technical concept of the present invention, can carry out technical scheme a variety of simple
Modification, these simple variants all belong to the scope of protection of the present invention.It is each specific described in above-mentioned specific embodiment
Technical characteristic in the case of no contradiction, can be combined by any suitable means.In order to avoid unnecessary heavy
Multiple, the present invention no longer separately illustrates various combinations of possible ways.
Claims (3)
1. a kind of liquid crystal display, which is characterized in that including liquid crystal cell, polarizer and structure of polarized light, which has opposite
The first side and second side of setting, the polarizer are arranged at the first side of the liquid crystal cell, which is arranged at this
The second side of liquid crystal cell, the structure of polarized light include three pieces of polarizers and two blocks of half-wave plates, define the first side of the liquid crystal cell
The polarizer for the first polarizer, define three pieces of polarizers of the structure of polarized light as the second polarizer, the 3rd polarizer and the
Four polarizers define two blocks of half-wave plates of the structure of polarized light as the first half-wave plate and the second half-wave plate, which is set
In the second side of the liquid crystal cell, second polarizer, first half-wave plate, the 3rd polarizer, second half-wave plate and
4th polarizer stacks gradually connection, and the absorption axiss of first polarizer and the absorption axiss of second polarizer are mutually in 90 °, should
The absorption axiss of first polarizer and the absorption axiss of the 3rd polarizer are mutually at 45 °, the absorption axiss of first polarizer and the 4th
The absorption axiss of polarizer are mutually 135 °, and the absorption axiss of first polarizer and the optical axis of first half-wave plate are mutually 157.5 °, should
The absorption axiss of first polarizer and the optical axis of second half-wave plate are mutually in 90 °.
2. liquid crystal display as described in claim 1, which is characterized in that the polarizer of the liquid crystal display include polarizer and
It is arranged on the polarizer the first compensation film of both sides and the second compensation film up and down.
3. a kind of display device, which is characterized in that include the liquid crystal display any one of claim 1 to 2.
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| CN105388662B (en) * | 2015-12-25 | 2018-12-28 | 武汉华星光电技术有限公司 | Display panel and polarizing film |
| CN108508646A (en) * | 2018-03-23 | 2018-09-07 | 惠州市华星光电技术有限公司 | A kind of liquid crystal display device |
| CN110109287A (en) * | 2019-04-10 | 2019-08-09 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display device |
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| US7548290B1 (en) * | 2005-11-28 | 2009-06-16 | Nitto Denko Corporation | Polarizing plate with optical compensation layer and image display apparatus using the same |
| US9921351B2 (en) * | 2012-05-10 | 2018-03-20 | Samsung Electronics Co., Ltd. | Multilayered optical film, manufacturing method thereof, and display device |
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| CN101034228A (en) * | 2006-03-07 | 2007-09-12 | Nec液晶技术株式会社 | Half-transmitting reflection type liquid crystal display |
| CN101427177A (en) * | 2006-08-09 | 2009-05-06 | 夏普株式会社 | Liquid crystal display device and viewing angle control module |
| CN101149511A (en) * | 2006-09-21 | 2008-03-26 | 日东电工株式会社 | Liquid crystal panel and liquid crystal display device |
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