KR20170091929A - A Mirror Capable of a Reflectivity - Google Patents

A Mirror Capable of a Reflectivity Download PDF

Info

Publication number
KR20170091929A
KR20170091929A KR1020160012845A KR20160012845A KR20170091929A KR 20170091929 A KR20170091929 A KR 20170091929A KR 1020160012845 A KR1020160012845 A KR 1020160012845A KR 20160012845 A KR20160012845 A KR 20160012845A KR 20170091929 A KR20170091929 A KR 20170091929A
Authority
KR
South Korea
Prior art keywords
reflectance
unit
liquid crystal
pair
mirror
Prior art date
Application number
KR1020160012845A
Other languages
Korean (ko)
Inventor
이대영
김주영
Original Assignee
주식회사 자연과사람
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 자연과사람 filed Critical 주식회사 자연과사람
Priority to KR1020160012845A priority Critical patent/KR20170091929A/en
Publication of KR20170091929A publication Critical patent/KR20170091929A/en
Priority to KR1020180086445A priority patent/KR102420864B1/en

Links

Images

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
    • G02F1/133553—Reflecting elements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G1/00—Mirrors; Picture frames or the like, e.g. provided with heating, lighting or ventilating means
    • A47G1/02—Mirrors used as equipment
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes

Abstract

The present invention relates to a reflectance control mirror, and more particularly, to a reflectance control mirror whose reflectance is controlled according to the amount of incident light. The reflectance adjusting mirror includes a pair of reflecting units (11, 12) arranged to face each other; A liquid crystal unit (13) arranged between the pair of reflection units (11, 12); And a pair of electrodes for applying an electric field to the liquid crystal unit (13), and the incident surface of the pair of reflection units (11, 12) has a predetermined reflectance.

Description

A Mirror Capable of a Reflectivity [

The present invention relates to a reflectance control mirror, and more particularly, to a reflectance control mirror whose reflectance is controlled according to the amount of incident light.

A mirror that reflects the shape of an object at various positions using light reflection generally has a reflectance of 70 to 90% and an appropriate reflectance depending on the use of the mirror. And various conductive materials may be coated on the entire surface of the mirror to increase the reflectance as required. Higher reflectance of the mirror can have the advantage that the image becomes clearer, but it may be advantageous to maintain a certain level of reflectance on the mirror depending on the application. For example, in the case of a rear mirror of a vehicle, if the reflectance is high, a high reflectance of light may cause glare. In addition, when the reflectance of the smartphone liquid crystal is high, the image of an external object may be projected on the liquid crystal, resulting in low visibility.

Patent Publication No. 10-2008-0022846 includes a backlight unit, a lower polarizer disposed above the backlight unit, a liquid crystal positioned above the lower polarizer, and an upper reflective polarizer positioned above the liquid crystal, Type polarizing plate is characterized in that a periodically arranged metal line grating is formed on a support.

Patent Publication No. 10-2005-0099236 relates to a structure for preventing glare by using a photochromic material in a housing for forming a vehicle side mirror or a room mirror, A polymer coating layer containing a photochromic organic compound and an ultraviolet coating layer formed on the front surface of the substrate, and at least one ultraviolet lamp And an anti-glare mirror by photochromic polymer matrix coating.

The prior art discloses a method of increasing the brightness in the case of power shutdown or a method of adjusting the reflectance according to the discoloration characteristics due to ultraviolet transmission of a photochromic material. However, such a method is disadvantageous in that the control of the reflectance is limited by the incoming light or the control range is limited.

The present invention has been made to solve the problems of the prior art and has the following purpose.

Prior Art 1: Patent Publication No. 10-2008-0022846 (published by LG Chem Co., Ltd., Mar. 12, 2008) Mirror-type liquid crystal display device using reflective polarizer Prior Art 2: Patent Publication No. 10-2005-0099236 (published by Kim, Kyung-Tae, October 13, 2005) Anti-glare mirrors by photochromic polymer matrix coating

SUMMARY OF THE INVENTION It is an object of the present invention to provide a reflectance control mirror that automatically adjusts the reflectivity according to the amount of incident light or preset conditions.

According to a preferred embodiment of the present invention, the reflectance adjusting mirror comprises a pair of reflecting units arranged to face each other; A liquid crystal unit disposed between the pair of reflection units; And a pair of electrodes for applying an electric field to the liquid crystal unit, wherein an incident surface of the pair of reflection units has a predetermined reflectance.

According to another preferred embodiment of the present invention, the voltage applied to the pair of electrodes is determined by the amount or roughness of the incident light incident on the pair of reflection units.

According to another preferred embodiment of the present invention, the apparatus further includes a direction detection unit for detecting a direction of light incident on the pair of reflection units.

The mirror according to the present invention has a simple structure and allows the reflectance to be appropriately adjusted according to the surrounding situation. The mirror according to the present invention can also be used as a variety of industrial mirrors or everyday mirrors, including automobiles, square surveillance mirrors or electronic devices.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing an embodiment of the operating structure of a reflectivity adjusting mirror according to the present invention.
2 shows an embodiment of a reflectance control mirror according to the present invention.
FIG. 3 shows an embodiment of a structure in which reflectance is controlled in a reflectance control mirror according to the present invention.
4 shows another embodiment of a reflectance control mirror according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto. In the following description, components having the same reference numerals in different drawings have similar functions, so that they will not be described repeatedly unless necessary for an understanding of the invention, and the known components will be briefly described or omitted. However, It should not be understood as being excluded from the embodiment of Fig.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing an embodiment of the operating structure of a reflectivity adjusting mirror according to the present invention.

Referring to FIG. 1, the reflectance adjusting mirror includes a pair of reflecting units 11 and 12 arranged to face each other; A liquid crystal unit (13) arranged between the pair of reflection units (11, 12); And a pair of electrodes for applying an electric field to the liquid crystal unit (13), and the incident surface of the pair of reflection units (11, 12) has a predetermined reflectance.

The reflectance control mirror according to the present invention has a characteristic in which reflectance is automatically controlled according to the amount of incident light. When the amount of incident light is small, all the light can be reflected to form an image. In contrast, when the amount of incident light is large, some of the light can be reflected and the remaining light can be prevented from being reflected. Thereby preventing glare and allowing a recognizable image to be formed at the same time regardless of the amount of incident light. The mirror can be a concave mirror, a convex mirror or a flat mirror, and the reflectance can be set appropriately according to the use of the mirror.

The reflection units 11 and 12 may be mirrors capable of forming an image by the reflection of light, and the surface on which the light is incident may be a mirror surface. The mirror surface can be formed, for example, by coating, properties of the material itself, or adhesion of the coating film, and can be made into any structure capable of forming an image depending on the shape of the surface. The reflection units 11 and 12 may have reflection surfaces or mirror surfaces formed in the same direction, and reflection surfaces or mirror surfaces may be arranged in parallel. The reflection units 11 and 12 can be made to have a reflectance between 20 and 60%, respectively. The reflection units 11 and 12 disposed separately from each other may have the same or different reflectance and the total reflectance reflected by the two reflection units 11 and 12 may be two The reflectance of the reflection units 11 and 12 can be set. The interval between the reflection units 11 and 12 can be determined by the transmittance or the reflectance of the liquid crystal unit 13 and can be, for example, 0.5 to 3.0 mm.

A liquid crystal unit 13 may be disposed between the reflection units 11 and 12. [ The liquid crystal unit 13 has a function of changing the arrangement of molecules in the interior according to the application of an electric field, thereby causing light transmittance, optical rotation, selective light scattering, or polarization. The liquid crystal unit 13 includes any liquid crystals known in the art. The liquid crystal unit may have a function of changing the transmission property or polarization property by an applied electric field although the molecular arrangement structure is changed by external influences such as temperature, electric field or magnetic field or stress .

As shown in FIG. 1, when the incident light IL is incident on the mirror, a part of the light is reflected by the one reflection unit 11 to become one reflected light RL1, and thus an image can be formed. Unreflected light among the incident light IL can be transmitted to the liquid crystal unit 13. If light is not transmitted through the liquid crystal unit 13, the light reflected through the entire mirror becomes one reflected light RL1. If the incident light IL becomes higher than the level at which a recognizable image is formed, an image may be formed by one reflected light RL1, and the reflectance by one reflected light RL1 may be, for example, 50%. This can prevent glare. In contrast, if the level of the incident light IL is low, the light transmitted through the one reflection unit 11 passes through the liquid crystal unit 13 and can be reflected by the two reflection units 12 to form the two reflected light RL2. And an image may be formed by the one reflected light RL1 and the two reflected light RL2. For example, the 2-reflection unit 12 may have a reflectance of 80% and may further reflect light by an amount corresponding to 0.5 x 0.8 x A (where A is the attenuation level by the liquid crystal unit 13) Image can be made. In this manner, the amount of the two reflected light RL2 can be determined by the liquid crystal unit 13, and thereby the reflectance of the entire mirror can be adjusted.

Each of the one reflection unit 11 or the two reflection units 12 may have at least one reflection surface and the transmission characteristics of the liquid crystal unit 13 may be adjusted by application of an electric field.

2 shows an embodiment of a reflectance control mirror according to the present invention.

2, a liquid crystal unit 13 including liquid crystal may be disposed between one reflective unit 11 and the two reflective units 12, and may be provided on one side of the liquid crystal unit 13, A pair of electrode units 21a and 21b can be disposed. The electrode units 21a and 21b may be, for example, a transparent electrode layer, and the one electrode unit 21a and the two electrode unit 21b may have the same or different electrode arrangement structure. The one-electrode unit 21a and the two-electrode unit 21b may be, for example, ITO transparent electrodes having a thickness of 10 to 1,000 nm, silver nanowire transparent electrodes or similar electrode layers. In order to form an electric field suitable for the arrangement of liquid crystals in the liquid crystal unit 13, the one electrode unit 21a may form one plane and the two electrode unit 21b may be arranged as a plurality of separate electrode groups. The liquid crystal unit 13 and the electrode units 21a and 21b can be integrally formed and the electrode units 21a and 21b are formed in such a manner that a transparent electrode pattern is coated on both sides of a liquid crystal or a liquid crystal polymer (LCP) Can be made. By applying a voltage to the electrode units 21a and 21b, various types of electric fields can be formed inside the liquid crystal unit, thereby changing the arrangement of liquid crystal molecules, and the light transmittance can be changed according to voltage application.

The liquid crystal unit 13 may have a polarization characteristic, whereby the one reflection unit 11 or the two reflection unit 12 can be made integral with the polarizing film. The polarizing property of the polarizing film can be appropriately set in accordance with the characteristics of the liquid crystal unit 13.

FIG. 3 shows an embodiment of a structure in which reflectance is controlled in a reflectance control mirror according to the present invention.

Referring to FIG. 3, the reflectance of the reflectance control mirror is controlled by a control unit 31 which determines the voltage applied to the electrode unit 21 according to the environmental conditions; And a voltage regulating unit 32 that regulates the type or size of the electric field applied under the control of the control unit 31. [

The control unit 31 must be applied to the electrode unit 21 based on the information transmitted from the 1 detection unit 331 detecting the level of illumination or incident light or the 2 direction detection unit 332 detecting the direction of the incident light The voltage level to be determined can be determined. As described above, the electrode unit 21 may be composed of a pair of electrode layers facing each other, and the pair of electrode layers may have the same or different electrode arrangement structure. The transmittance of the incident light can be determined according to the electric field structure inside the liquid crystal unit formed by the electrode unit 21. The control unit 31 can determine the level of the illuminance or the incident light detected from the 1 detection unit 331 to determine the transmittance of the liquid crystal unit. The direction of the incident light detected from the two-direction detecting unit 332 can be determined. And determine the reflectivity that can be perceived in the detected illuminance according to the determined information, while eliminating glare or other visible property reduction. And the voltage level of the electrode unit 21 according to the determined reflectance can be determined. The voltage regulating unit 32 can apply a voltage to the electrode unit 21 according to the level determined in the control unit 31 so that the reflectance of the regulating mirror 10 can be adjusted.

The control unit 31 may have a database storing data on reflectance along the illuminance, incident light, or direction and at the same time, data on the reflectance according to the voltage applied to the electrode unit 21. [ Then, the voltage applied to the electrode unit 21 can be automatically adjusted based on the detection information transmitted from the 1 detection unit 331 and the 2-way detection unit 332. This allows the user to obtain an optimal image from the adjustment mirror 10.

4 shows another embodiment of a reflectance control mirror according to the present invention.

4, one polarization plate 41 is disposed in one reflection unit 11, and a two polarization plate 42 is arranged in the two reflection unit 12. The first polarizing plate 41 and the second polarizing plate 42 may have the same direction or may have different directions and may be determined by the characteristics of the liquid crystal unit or the reflection characteristics of the two-reflection unit 12. [ A light direction sensor 461 can be disposed behind the 2-reflection unit 12 and an illuminance sensor 462 is disposed in one reflection unit 11 and a light level sensor 463 is provided in the 1-electrode unit 21a . Each of the electrode units 21a and 21b can be connected to a power source 43 such as a battery, and a balancing circuit 44 can be disposed if necessary. The voltage applied from the power source 43 to the electrode units 21a and 21b can be adjusted by the voltage regulating unit 32. [ And the control unit 31 may be coupled to a database 47 that stores data related to the reflection conditions.

If a large amount of light is incident, it can be detected by a light level sensor 463, for example a photosensor, and transmitted to the control unit 31. [ The control unit 31 can adjust the voltage regulating unit 32 to apply a voltage to the electrode units 21a and 21b. The voltage of the electrode units 21a and 21b causes the light transmitted through the one reflection unit 11 to fail to reach the two reflection unit 12, Is determined by the reflectance and can be, for example, from 40 to 70%. The balance circuit 44 allows the voltage applied by the power source 43 to be maintained at a constant level in this process.

If the level of incident light is changed, it can be detected by the light level sensor 463 and transmitted to the control unit 31. The control unit 31 can determine the voltage to be applied to the electrode units 21a and 21b in accordance with the illuminance detected by the illuminance sensor 462, the amount of incident light, and the direction of the light reaching the two reflective units 12 have. 2 The direction of the light reaching the reflective unit 12 can be measured by the optical direction sensor 461 and the determination of the applied voltage can be determined based on the data stored in the database 47. [ If the amount of incident light is at a low level, the voltage applied to the electrode units 21a and 21b is removed and thus all light reaching the two-reflection unit 12 can be reflected.

The reflectance control mirror according to the present invention may have various reflective structures and the present invention is not limited to the embodiments shown.

The mirror according to the present invention has a simple structure and allows the reflectance to be appropriately adjusted according to the surrounding situation. The mirror according to the present invention can also be used as a variety of industrial mirrors or everyday mirrors, including automobiles, square surveillance mirrors or electronic devices.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention . The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

10: Adjustable mirror 11: 1 Reflective unit
12: 2 reflection unit 13: liquid crystal unit
21a: one electrode unit 21b: two electrode unit
31: control unit 32: voltage regulation unit
41: 1 polarizing plate 42: 2 polarizing plate
43: power supply 44: balance circuit
47: Database 331: 1 detection unit
332: Two-way detection unit 461: Optical direction sensor
462: illuminance sensor 463: light level sensor
IL: incident light RL1: 1 reflected light
RL2: 2 reflected light

Claims (3)

In a mirror whose reflectance is controlled,
A pair of reflection units (11, 12) arranged to face each other;
A liquid crystal unit (13) arranged between the pair of reflection units (11, 12); And
A pair of electrodes for applying an electric field to the liquid crystal unit 13,
And the incident surface of the pair of reflection units (11, 12) has a predetermined reflectance. The reflectance control mirror according to claim 1, wherein the voltage applied to the pair of electrodes is determined by the amount or roughness of the incident light incident on the pair of reflection units (11, 12). The reflectance control mirror according to claim 1, further comprising a direction detection unit for detecting a direction of light incident on the pair of reflection units (11, 12).
KR1020160012845A 2016-02-02 2016-02-02 A Mirror Capable of a Reflectivity KR20170091929A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020160012845A KR20170091929A (en) 2016-02-02 2016-02-02 A Mirror Capable of a Reflectivity
KR1020180086445A KR102420864B1 (en) 2016-02-02 2018-07-25 A Mirror Capable of a Reflectivity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160012845A KR20170091929A (en) 2016-02-02 2016-02-02 A Mirror Capable of a Reflectivity

Related Child Applications (1)

Application Number Title Priority Date Filing Date
KR1020180086445A Division KR102420864B1 (en) 2016-02-02 2018-07-25 A Mirror Capable of a Reflectivity

Publications (1)

Publication Number Publication Date
KR20170091929A true KR20170091929A (en) 2017-08-10

Family

ID=59652417

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160012845A KR20170091929A (en) 2016-02-02 2016-02-02 A Mirror Capable of a Reflectivity

Country Status (1)

Country Link
KR (1) KR20170091929A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110680138A (en) * 2019-10-12 2020-01-14 九牧厨卫股份有限公司 Automatic control method for anti-fog mirror

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110680138A (en) * 2019-10-12 2020-01-14 九牧厨卫股份有限公司 Automatic control method for anti-fog mirror
CN110680138B (en) * 2019-10-12 2022-08-12 九牧厨卫股份有限公司 Automatic control method for anti-fog mirror

Similar Documents

Publication Publication Date Title
KR101087627B1 (en) Mirror with built-in display
US6636285B2 (en) Reflective liquid crystal display with improved contrast
US9557621B2 (en) Liquid crystal display device
JP2020506439A (en) Rearview mirror with dimming function
EP0916989A2 (en) Laminated wavelength plate, circular polarizing plate and liquid crystal display
WO2011068852A1 (en) Rearview mirror assemblies with anisotropic polymer laminates
US20030133284A1 (en) Reflectors
EP3465336B1 (en) Display system with phase oriented reflective control
TWI551932B (en) Display apparatus
TWI286646B (en) Liquid-crystal display device and light pipe
US20060221452A1 (en) Anti-glare reflective and transmissive devices
KR101942584B1 (en) Display device
JP2007506152A (en) Switchable transflective reflector and transflective display
TW200809327A (en) Transflective LC display having narrow band backlight and spectrally notched transflector
TW200419255A (en) Transflective liquid crystal display device
US9933656B1 (en) Liquid crystal display with light guide
TW201537239A (en) Systems for and methods of ambient-light reduction in OLED display systems and LCD systems
CN110596934A (en) Liquid crystal display panel and driving method
KR20170091929A (en) A Mirror Capable of a Reflectivity
KR101866951B1 (en) A Liquid Crystal Screen Having a Structure of Adapting to an Environment
KR100646444B1 (en) LCD mirror with adjustable reflectivity
KR102420864B1 (en) A Mirror Capable of a Reflectivity
KR101728849B1 (en) A Liquid Crystal Mirror Having a Structure of Controlling a Reflectivity
CN216902149U (en) Display screen
CN112394547A (en) Visual angle control structure and display device

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application
A107 Divisional application of patent