CN208506437U

CN208506437U - A kind of liquid crystal light modulation device

Info

Publication number: CN208506437U
Application number: CN201821243295.5U
Authority: CN
Inventors: 吴梓荣
Original assignee: Akita Shenzhen Microelectronics Ltd By Share Ltd
Current assignee: Akita Shenzhen Microelectronics Ltd By Share Ltd
Priority date: 2018-08-01
Filing date: 2018-08-01
Publication date: 2019-02-15
Anticipated expiration: 2028-08-01

Abstract

The utility model relates to photoelectric fields, more particularly to a kind of liquid crystal light modulation device, main includes the first polarizing layer set gradually from top to bottom, the first conductive layer, the first vertically oriented layer, vertically aligned liquid crystal layer, the second vertically oriented layer, the second conductive layer and the second polarizing layer, second polarizing layer is semi-transparent semi-reflecting polarizing layer, and first conductive layer and the second conductive layer connect power supply.The utility model controls liquid crystal by electric field adjusting and cooperates the optical axis direction of polarizing layer to change the polarization direction of light at the transformation of optical path delay amount with vertically oriented liquid crystal technology, reaches control light transmission, reflection and absorbs three kinds of states, photoelectric efficiency is high.

Description

A kind of liquid crystal light modulation device

Technical field

The utility model relates to photoelectric field more particularly to a kind of liquid crystal light modulation devices.

Background technique

Liquid crystal electro-optic technology is other than for showing, as intellectual technology is risen, its special photoelectric characteristic of liquid crystal technology Start largely to apply in non-display field, such as electric welder's helmet with an automatic light meter, automatic light-adjustment curtain etc..But existing liquid crystal tune Light device there is also dimming capabilities it is poor, photoelectric efficiency is poor the problems such as.

Utility model content

In view of the deficienciess of the prior art, the liquid crystal tune good the purpose of this utility model is to provide a kind of dimming capability Optical device.

To achieve the above object, the utility model can be achieved by the following technical programs:

A kind of liquid crystal light modulation device, including the first polarizing layer, the first conductive layer, first vertical set gradually from top to bottom Oriented layer, vertically aligned liquid crystal layer, the second vertically oriented layer, the second conductive layer and the second polarizing layer, second polarizing layer are Semi-transparent semi-reflecting polarizing layer, first conductive layer and the second conductive layer connect power supply.

Further, the angle of the liquid crystal molecule optical axis of the optical axis and vertically aligned liquid crystal layer of first polarizing layer is 45 °, the angle of the liquid crystal molecule optical axis of the optical axis and vertically aligned liquid crystal layer of second polarizing layer is 45 °, and described first partially The optical axis included angle of photosphere and the second polarizing layer is 90 °.

Further, first conductive layer and the second conductive layer are transparent glass or transparent plastic sheet.

Further, the transmitance of first conductive layer and the second conductive layer is all larger than 85%.

Further, the described first vertically oriented layer is opposite with the second vertical orientation differently- oriented directivity of layer and their folder Angle is less than 10 °

Further, the optical path delay amount of the vertically aligned liquid crystal layer is 1/2 λ, and λ is the wavelength of light.

The utility model controls liquid crystal into the change of optical path delay amount with vertically oriented liquid crystal technology, by electric field adjusting It changes, to change the polarization direction of light, cooperates the optical axis direction of polarizing layer, reach control light and penetrate, reflect and absorb three kinds of shapes State, photoelectric efficiency are high.The utility model is suitable for various light modulation scenes, motor-vehicle glass window, smart home, the intelligence electricity of such as light modulation Device etc., such as a display screen is superimposed behind the utility model, it is mirror or black when the utility model is opaque Color background has the effect of combining together with display screen component；It is pellucidity, the utility model when utility model works The display picture of subsequent display screen can be penetrated clearly.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Liquid crystal deflection state diagram when Fig. 2 is no power；

Liquid crystal deflection state diagram when Fig. 3 is switched on；

Fig. 4 is the angle figure of the first polarizing layer and the second polarizing layer and liquid crystal molecule optical axis；

Fig. 5 is reflectivity transmittance curve figure；

In figure: 1, the first polarizing layer；2, the first conductive layer；3, the first vertically oriented layer；4, vertically aligned liquid crystal layer；41, Liquid crystal molecule；5, the second vertically oriented layer；6, the second conductive layer；7, the second polarizing layer.

Specific embodiment

The utility model is further described below in conjunction with attached drawing and specific embodiment:

As shown in Figure 1, liquid crystal light modulation device described in the utility model, including the first polarisation set gradually from top to bottom The vertically oriented layer 3 of the 1, first conductive layer of layer 2, first, vertically aligned liquid crystal layer 4, second vertically oriented layer 5,6 and of the second conductive layer Second polarizing layer 7, the second polarizing layer 7 are semi-transparent semi-reflecting polarizing layer, and the first conductive layer 2 and the second conductive layer 6 connect power supply.Pass through It gives the first conductive layer 2 and the second conductive layer 6 input power, forms electric field, control electric field level changes vertically aligned liquid crystal layer 4 41 tilt angle of liquid crystal molecule, controls the transmitance of light.

The angle of 41 optical axis of liquid crystal molecule of the optical axis and vertically aligned liquid crystal layer 4 of first polarizing layer 1 is 45 °, and second partially The angle of 41 optical axis of liquid crystal molecule of the optical axis and vertically aligned liquid crystal layer 4 of photosphere 7 is 45 °, the first polarizing layer 1 and the second polarisation The optical axis included angle of layer 7 is 90 °.First conductive layer 2 and the second conductive layer 6 are transparent glass or transparent plastic sheet, and first The transmitance of conductive layer 2 and the second conductive layer 6 is all larger than 85%.The orientation side of first vertically oriented layer and the second vertically oriented layer To opposite and their angle less than 10 °.The optical path delay amount of vertically aligned liquid crystal layer 4 is 1/2 λ, and λ is the wavelength of light, is reached To best optical efficiency.

Vertically aligned liquid crystal layer 4 is the rod shaped liquid crystal of dielectric negativity, when 6 no power of the first conductive layer 2 and the second conductive layer When, as shown in Fig. 2, the first conductive layer 2 and 6 interlayer of the second conductive layer are zero electric field, the liquid crystal molecule 41 of vertically aligned liquid crystal layer 4 It does not overturn, only vertical with oriented layer by oriented layer anchoring influence molecular long axis direction, 41 long axis direction of liquid crystal molecule is without refraction Rate, light can be through vertically aligned liquid crystal layer 4 and light direction does not change.

90 ° of optical axis direction angle of first polarizing layer 1 and the second polarizing layer 7, when natural light is incident on the first polarizing layer 1, The polarised light in direction only consistent with 1 optical axis direction of the first polarizing layer penetrates, when zero electric field, the light of vertically aligned liquid crystal layer 4 Shaft vertically aligned layer, vertically aligned liquid crystal layer 4 is without refractive index, and polarised light penetrates and do not change direction at this time, passes through vertical orientation 90 ° of optical axis included angle of incident light polarization direction and the second polarizing layer 7 after liquid crystal layer 4, at this moment the second polarizing layer 7 by part light into Row absorbs, reflects part light.At this time from the first polarizing layer 1, liquid crystal light modulation device is in shading status, and second The subsequent object of polarizing layer 7 is blocked.

When the first conductive layer 2 and the second conductive layer 6 are powered, electricity is formd between the first conductive layer 2 and the second conductive layer 6 , as shown in figure 3, electric field strength reaches 41 optical axis of liquid crystal molecule of vertically aligned liquid crystal layer 4 and direction of an electric field angle is 90 ° (i.e. perpendicular to electric field), the optical path delay amount of vertically aligned liquid crystal layer 4 reaches 1/2 λ at this time.When natural light is incident on the first polarisation The polarised light of layer 1, direction only consistent with 1 optical axis direction of the first polarizing layer penetrates, and light deflects in 1/2 λ layers of optical path delay amount Direction generates deflection.As shown in figure 4, this deflection angle is according to Jones matrix principle, 1 optical axis of the first polarizing layer and vertically oriented liquid 41 optical axis included angle of crystal layer 4 when optical axis vertical electric field (under electric field driven) middle layer liquid crystal molecule is θ, and polarised light passes through liquid crystal layer After when optical axis vertical electric field (under electric field driven), light polarization direction and 4 optical axis included angle of vertically aligned liquid crystal layer are θ ', if θ =-45 °, then θ '=45 °, light passes through 90 ° of 4 post deflection of vertically aligned liquid crystal layer, at this moment light polarization direction and the second polarisation The optical axis of layer 7 is parallel, and light is penetrated from the second polarizing layer 7.Entire liquid crystal light modulation device is in light transmission state at this time.If incident light For polarised light, and when optical axis direction is consistent with the polarizing axis of the first polarizing layer 1 or the second polarizing layer 7, the polarised light at this time Transmitance is up to 65% or more, is more than existing product.

Illustrate the present embodiment in order to clearer, test data will be enclosed below:

The parameter of liquid crystal light modulation device is as follows:

The test data of liquid crystal light modulation device is as follows:

When incident light is polarised light, and optical axis direction is consistent with the polarizing axis of the first polarizing layer or the second polarizing layer, The transmitance of the polarised light is up to 65% or more at this time, is more than existing product.

When the degree of polarization of the second polarizing layer is increased to 99% or more, reflection and transmitance are below under different energized states 1%.

For those skilled in the art, it is various corresponding that other can be made according to above technical scheme and design Change and deformation, and all these change and modification all should belong to the utility model claims protection scope it It is interior.

Claims

1. a kind of liquid crystal light modulation device, it is characterised in that: including the first polarizing layer, first conductive set gradually from top to bottom Layer, the first vertically oriented layer, vertically aligned liquid crystal layer, the second vertically oriented layer, the second conductive layer and the second polarizing layer, described the Two polarizing layers are semi-transparent semi-reflecting polarizing layer, and first conductive layer and the second conductive layer connect power supply.

2. liquid crystal light modulation device according to claim 1, it is characterised in that: the optical axis of first polarizing layer takes with vertical Angle to the liquid crystal molecule optical axis of liquid crystal layer is 45 °, the optical axis of second polarizing layer and the liquid crystal of vertically aligned liquid crystal layer The angle of molecule optical axis is 45 °, and the optical axis included angle of first polarizing layer and the second polarizing layer is 90 °.

3. liquid crystal light modulation device according to claim 1 or 2, it is characterised in that: first conductive layer and the second conduction Layer is transparent glass or transparent plastic sheet.

4. liquid crystal light modulation device according to claim 3, it is characterised in that: first conductive layer and the second conductive layer Transmitance is all larger than 85%.

5. liquid crystal light modulation device according to claim 4, it is characterised in that: the described first vertically oriented layer is vertical with second The differently- oriented directivity of oriented layer is on the contrary and their angle is less than 10 °.

6. liquid crystal light modulation device according to claim 5, it is characterised in that: the optical path delay of the vertically aligned liquid crystal layer Amount is 1/2 λ, and λ is the wavelength of light.