KR20210059569A - Transparency variable glass - Google Patents

Abstract

The present invention relates to a glass with variable transparency, and more particularly, to a glass in which transmittance of incident light is variably controlled. In the present invention, a first electrode provided with a first transparent electrode on an inner surface, a second electrode provided with a second transparent electrode on the inner surface, and provided between the first electrode and the second electrode, and the first transparent electrode and And a microcapsule for controlling transmittance of incident light by changing positions of fine particles having a single polarity in response to a voltage applied to the second transparent electrode.

Description

Transparency variable glass

The present invention relates to a glass with variable transparency, and more particularly, to a glass in which transmittance of incident light is variably controlled.

Variable Transparency Switching Window (VTSW), which is applied to the front glass or sunroof of a vehicle, can change the transmittance according to each transparency. Accordingly, a device for controlling transmittance has been devised to provide transparency that meets the user's selection.

In general, a variable transparency glass includes a transmission layer capable of changing light transmittance and optical characteristics in response to power applied to a supply electrode terminal through two power supply electrodes. In constituting such a transmission layer, the transparency variable glass includes a transmission layer mainly composed of a liquid crystal polymer.

Recently, since the above-described variable transparency glass is applied to the glass glass of a vehicle, the glass transparency of the vehicle can be changed according to the user's selection. Moreover, in the case of a vehicle to which a head-up display is applied, control of the transparency of the vehicle's windshield is an essential factor.

However, in the case of the variable transparency glass configured as above, it is difficult to adjust the transparency according to the user's selection. In addition, in the case of a transparency control glass manufactured by forming a transparent layer in a gas structure, there are disadvantages in that the density of the gas is unbalanced and a separate circuit is required for driving the gas structure.

An embodiment of the present invention provides a variable transparency glass that allows the transparency to be adjusted according to a user's request and environment.

The variable transparency glass according to an embodiment of the present invention includes: a first electrode having a first transparent electrode disposed on an inner surface thereof; A second electrode provided with a second transparent electrode on the inner surface; And a microcapsule that is provided between the first electrode and the second electrode, and controls the transmittance of incident light by changing positions of fine particles having a single polarity in response to a voltage applied to the first transparent electrode and the second transparent electrode. do.

A variable transparency glass according to another embodiment of the present invention includes: a first electrode to which a first voltage is applied; A second electrode to which a second voltage is applied; A third electrode to which a third voltage is applied; A fourth electrode to which a fourth voltage is applied; And a microcapsule provided between the first to fourth electrodes and configured to control transmittance of incident light by changing positions of fine particles having a single polarity in response to a potential difference between the first to fourth voltages.

According to an embodiment of the present invention, it is possible to variably control the transparency of the glass in response to a user's request and environment.

In addition, the embodiment of the present invention provides an effect of reducing power consumption, minimizing light scattering, and reducing the cost of implementing glass.

In addition, the embodiments of the present invention are for illustration purposes, and those skilled in the art will be able to make various modifications, changes, substitutions, and additions through the technical spirit and scope of the appended claims, and such modifications and changes are included in the following claims. It should be viewed as.

1 is a view for explaining the concept of a variable transparency glass according to an embodiment of the present invention.
2 is a block diagram of an apparatus for controlling a variable transparency glass according to an embodiment of the present invention.
3 is a detailed configuration diagram of a variable transparency glass according to an embodiment of the present invention.
Figure 4 is a structure related to the transparency variable glass of Figure 3;
5 is a view showing a single particle structure of the microcapsule of FIG. 4.
Fig. 6 is a diagram for explaining the structure of the microcapsule of Fig. 4;
Fig. 7 is a diagram for explaining an operation relating to the microcapsule of Fig. 6;
Figure 8 is another embodiment of the microcapsule of Figure 4;
9 is a view showing the electrode structure of the microcapsule of FIG. 8;
10 is a graph for explaining the transmittance linear control level of the transparency variable glass of FIG. 8.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible, even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with an understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

1 is a view for explaining the concept of a variable transparency glass according to an embodiment of the present invention.

Referring to FIG. 1, in an embodiment of the present invention, a difference in transmittance due to electrophoresis may be controlled using a variable transparency glass 10 which is a variable transmittance electrophoretic display (VT-EPD). . The transparency variable glass 10 may be formed in the form of a conductive film or glass. The variable transparency glass 10 may be mounted by cutting and molding according to the shape of the glass for a vehicle or a target object using a variable transmittance electrophoretic display device (VT-EPD).

The transparency variable glass 10 can variably control the transmittance of the vehicle window. When the transparency variable glass 10 is applied to a vehicle, safety and convenience of the vehicle may be improved.

As the functions of vehicles are gradually evolving and in line with the future autonomous driving era, vehicles can be given a value not as a simple means of transportation but as a living space. Accordingly, the variable transparency glass 10 according to an exemplary embodiment of the present invention can be applied to a vehicle for autonomous driving as well as a general vehicle. In this case, a privacy zone can be established and occupants can be protected from external environments such as ultraviolet rays, infrared rays, and excessive temperature changes.

2 is a block diagram of an apparatus for controlling a variable transparency glass according to an exemplary embodiment of the present invention.

Referring to FIG. 2, an apparatus for controlling a variable transparency glass according to an embodiment of the present invention includes a variable transparency glass 10, a voltage controller 20, a controller 30, and a memory 40.

Here, the transparency variable glass 10 is a film or a thin film structure in which the glass is deposited, and the transmittance can be changed. The transparency variable glass 10 may include a variable transmittance electrophoretic display device (VT-EPD) between films or glasses. The variable transparency glass 10 has light transmittance dependent on a position change of fine particles in the variable transmittance electrophoretic display device VT-EPD, and the light transmittance is variably controlled according to a voltage source applied to the internal transparent electrode.

Transparency variable glass 10 is a separate switch operation, vehicle display device (e.g., navigation terminal, AVN; Audio Video Navigation) integrated control, user interface (UI; User Interface) control, smart phone application (Blue Link, etc.) By using, the transmittance of each window is manually or automatically switched. The transmittance of the transparency variable glass 10 is varied according to the user control or the automatic transmittance control mode, thereby providing an optimized window transmittance in the driving environment of the vehicle.

In addition, the voltage control unit 20 is controlled by the control unit 30 and provides a linear voltage to the transparent electrode of the transparency variable glass 10. The voltage control unit 20 may supply a linear voltage to the transparency variable glass 10 by stepping down or boosting the power using a converter including a switching element (MOSFET).

The voltage controller 20 may control a linear voltage level value so that the transmittance can be automatically changed in response to the environment of the vehicle. That is, the voltage control unit 20 may control the voltage level value so that the transmittance level can be automatically selected in response to a control signal applied from the control unit 30.

In addition, the voltage control unit 20 blocks the voltage output during shutdown, ramps a tunable soft-start current, and limits the foldback output current. I can.

In addition, the control unit 30 may select and control the transmittance mode in response to the input information IN. The controller 30 controls a voltage applied from the voltage controller 20 to the transparency variable glass 10 based on the transparency information selected by the user. The control unit 30 may variously implement the transmittance of the transparency variable glass 10 in multiple steps by applying a voltage of any one level selected from among a plurality of levels.

In addition, the control unit 30 may automatically control the transmittance mode according to the driving environment of the vehicle (eg, weather, sunlight, illumination change, tunnel, glare, autonomous driving mode). Here, the control unit 30 may control the automatically optimized transmittance mode in a dark driving environment such as a tunnel or rainy weather by interlocking with a global positioning system (GPS) and a rain sensor. In addition, it is possible to control the transmittance of the sunroof glass to be shielded and switched by sensing the external temperature and the amount of light through the sensor.

For example, the controller 30 may set the mode to transmit natural light in the Bright mode (transmittance of 70% or more). Can be set.

Also, the controller 30 may set a bright mode when the vehicle is reversing. In other words, it is possible to secure driving safety and improve visibility by automatically changing the rear glass and side mirrors (ISRVM; Inside Side Rear View Mirror, OSRVM; Outside Side Rear View Mirror) to bright mode when the vehicle is reversing. According to another embodiment, the controller 30 may be set to the bright mode at a request of a driver or a manual operation during autonomous driving of the vehicle.

The control unit 30 can be set to a mode for variably blocking light in the variable tinting mode (transmittance 69-25%). That is, the control unit 30 can avoid direct sunlight when the vehicle is parked or stopped. Variable mode can be set. In addition, content visibility can be improved by controlling the transmittance of each glass according to the viewing mode of the vehicle display device (gradual opacity mode according to illumination and backlighting).

In addition, the control unit 30 may set a mode in which light is completely blocked for the privacy sweet zone in the privacy mode (transmittance of 25% or less). That is, the control unit 30 is in an autonomous driving mode of the vehicle. It is possible to provide a comfortable transmittance (transmittance of 30% or less) by switching to the privacy mode when the driver is resting or sleeping.

Here, the driver's sleep state may be detected by checking the driver's heart rate, tracking pupils using a camera, or requesting the driver. In addition, it is possible to control the transmittance of the rear window and the rear window by switching to the privacy mode at the request of the occupant in the rear seat position.

According to an embodiment, when the external temperature changes or the weather changes after the vehicle is parked, the transmittance may be remotely switched. When the external temperature rises after parking of the vehicle, the user can shield ultraviolet rays by changing the setting mode of the controller 30 to an opaque mode using a smartphone application.

The memory 40 may store transmittance control information corresponding to each mode, including a look-up table (LUT, Look-Up Table) derived and constructed by prior experimentation and evaluation. The lookup table is a data table in which a voltage value provided to the transparency variable glass 10 is set according to the transparency or gray level of the transparency variable glass 10. In an embodiment of the present invention, the controller 30 may control the voltage of the voltage controller 20 based on data stored in a look-up table (LUT) of the memory 40.

The memory 40 provides data of a look-up table when a user's selection is input during voltage control by the controller 30, so that the response speed of the transmittance adjustment according to the user's selection can be minimized.

3 is a detailed configuration diagram of a variable transparency glass according to an embodiment of the present invention.

Referring to FIG. 3, a variable transparency glass 10 according to an embodiment of the present invention includes a first electrode 11, a second electrode 12, and a microcapsule 13.

The first electrode 11 and the second electrode 12 may be made of a plate-shaped transparent material, and may be disposed on both upper and lower sides of the glass 10 with variable transparency. The first electrode 11 and the second electrode 12 may control transmittance corresponding to electrophoresis. Here, the first electrode 11 and the second electrode 12 may integrally incorporate a transparent electrode on their inner surfaces.

In addition, a microcapsule 13 for controlling transmittance is mounted between the first electrode 11 and the second electrode 12. Positions of fine particles in the microcapsules 13 are changed by power supplied from the voltage controller 20, so that the transmittance of light (eg, visible light) may be controlled.

That is, the transparency variable glass 10 may change the transmittance by using fine particles (to be described later) moving along the anode or cathode when a current is passed through the microcapsule 13. In addition, when a voltage is not applied between the first electrode 11 and the second electrode 12, the transparency variable glass 10 enters a shade state, thereby enabling light shielding.

In addition, the variable transparency glass 10 according to an exemplary embodiment of the present invention can selectively control partial transmittance by partially controlling the electrode pattern when the first electrode 11 and the second electrode 12 are overlapped.

The variable transparency glass 10 according to the embodiment of the present invention separates the zones of the first electrode 11 and the second electrode 12 according to the mode set in the control unit 30 and controls each of the different transmittances. can do. That is, a region where the first electrode 11 and the second electrode 12 overlap within the same glass is divided into upper/lower and left/right regions.

In addition, the transparency variable glass 10 may individually supply a voltage applied from the voltage control unit 20 to each of the separated regions to partially control the transmittance of a partial region. In the exemplary embodiment of the present invention, the transmittance may be partially controlled corresponding to the potential difference between the separated regions.

In addition, the transparency variable glass 10 and the voltage control unit 20 are connected by a power cable 50. The power cable 50 may have a structure of an FFC Flexible Flat Cable. The power cable 50 is a lead type, integrally or fastened, and connected to the transparency variable glass 10. The power cable 50 may divide the transparency variable glass 10 according to the number of channels.

4 is a structure of the variable transparency glass of FIG. 3.

4, the transparency variable glass 10 includes a first electrode 11, a second electrode 12, a microcapsule 13, a first transparent electrode 14, a second transparent electrode 15, and Particles 16 and fillers 17 are included.

The transparency variable glass 10 is provided with a microcapsule 13 between the first electrode 11 and the second electrode 12.

According to an embodiment, the first electrode 11 and the second electrode 12 are multi-polyester (e.g., polyethylene terephthalate (PET), 1PLY (fly), 2PLY), Dyed ), Chip Dyed, Carbon, Metal, Ceramics, Sputter, Nano Carbon Ceramic, double laminated glass, etc.

Here, the dyed film is a dye film, which is a color conversion film using relaxation and shrinkage of the film. In addition, the Chip Dyed film is a film composed of a color film fabric itself. Carbon film is a film with increased durability by adding carbon to the fabric of the film. Metal film is a film coated by depositing metal on the surface of the film.

Ceramics film is a film obtained by processing and molding non-metallic and inorganic materials at high temperatures. The sputter film is a film in which a metal component is thinly coated in an atomic structure in a vacuum state. The nano-carbon ceramic film is a film that combines a carbon film and a ceramic film.

In addition, the first transparent electrode 14 may be included on the inner surface of the first electrode 11, and the second transparent electrode 15 may be included on the inner surface of the second electrode 12. The first transparent electrode 14 and the second transparent electrode 15 are electrodes for controlling the positions of fine particles 16 having a single polarity in the microcapsule 13. Here, the first transparent electrode 14 and the second transparent electrode 15 may be light-transmitting inorganic substrates or organic substrates, or electrodes in which the same or different types are stacked.

The transparent electrodes 14 and 15 have sufficient carriers, which are a medium for carrying electric charges, and have low resistance so that they can be easily moved and thus have a high conduction rate. The transparent electrodes 14 and 15 may be made of a transparent material so that light can be transmitted.

For example, the transparent electrodes 14 and 15 are indium tin oxide (ITO), indium zinc oxide (IZO), graphene, poly(ethylenedioxythiophene): polystyrenesulfonate; PEDOT: PSS), silver nanowire (Silver Nanowire), carbon nanotubes (CNT; Carbon NanoTube) may be made of a transparent conductive material.

Here, the indium tin oxide (indium tin oxide) has excellent electrical conductivity by combining indium oxide (In2O3) and tin oxide (SnO2), has high transmittance, can supply an electrical signal and transmit light. Graphene is a planar layer structure arranged in a hexagonal net shaped like a carbon honeycomb. Graphene has high electrical conductivity, fast movement of electrons, high strength and thermal conductivity, and can be applied to flexible devices.

Polystyrene sulfonate is synthesized by polymerizing an ethylenedioxythiophene (EDOT) monomer as a conductive polymer. Polystyrene sulfonate has high electricity, high conductivity, excellent flexibility and stability, and simple coating process.

Silver nanowires are bundles of nanometer microwires with a cross section made of silver. The silver nanowire sets nano-sized silver (Ag) to the substrate in a wire form, and has excellent transparency and conductivity due to its mesh shape. Carbon nanotubes are a bundle-shaped material in which carbons are connected like a honeycomb, and form a hexagonal honeycomb pattern and consist of 1 nanometer in size.

In the embodiment of the present invention, it has been described as an example that the first transparent electrode 14 is formed as one and the second transparent electrode 15 is formed as one. However, the number of transparent electrodes is not limited thereto, and may be formed of a plurality of transparent electrodes.

In addition, the microcapsules 13 may be disposed in a form filled between the first transparent electrode 14 and the second transparent electrode 15. The microcapsules 13 may include a transparent material. The microcapsule 13 includes fine particles 16 having electrodes and a filler 17.

The fine particles 16 have a single charge characteristic of a positive charge (+) or a negative charge (-) in the microcapsule 13. That is, the microcapsules 13 may include a single type of fine particles 16 having a positive charge or a negative charge.

These fine particles 16 are filled with colored particles in the microcapsules 13. The fine particles 16 may have a property of transmitting light. For example, the fine particles 16 may be made of a material having properties of absorbing, scattering, and reflecting visible light.

For example, when a voltage is applied to each pixel of the electrode so that the colored fine particles 16 are located on the display 18, incident light is absorbed and displayed as a dark color. On the other hand, when a voltage is applied so that the fine particles 16 having high scattering properties are located on the display 18, they are expressed in bright colors by scattering of incident light. In this way, the fine particles 16 of the microcapsules 13 have a clear contrast between black and white, and thus a high difference in brightness can be realized.

In addition, the filler 17 represents a filler in which the fine particles 16 in the microcapsule 13 can float. For example, the filler 17 may be formed in a liquid (eg, oil) form and may have a specific transmittance (60% or more).

Accordingly, the microcapsule 13 may variably control the opaque to transmissive region through a position change of the fine particles 16 of the variable transmittance electrophoretic display device VT-EPD. That is, when a voltage is applied to the layer filled with the microcapsules 13, it is possible to control the positions of the fine particles 16 having a single polarity, and the transmittance of the smart window can be varied through a potential difference.

Depending on the transmittance of the microcapsules 13, the total transmittance of the variable transparency glass in the form of a film or glass may be determined. Such microcapsules 13 can control transmittance of low turbidity (low refractive index) before and after application of voltage, and have excellent viewing angle characteristics.

5 shows a single particle structure of the microcapsule 13 of FIG. 4.

Referring to FIG. 5, the microcapsule 13 does not have two particles having a positive charge and a negative charge, but a single charge, that is, a single charge such as positive (+) charge or negative (B) charge. It includes fine particles 16 consisting only of electric charges. The microcapsules 13 control the transmittance by a potential difference of a single charge. Therefore, even when a voltage is applied, since the position of the fine particles 16 in the microcapsule 13 is located at the top or bottom of the transmission surface, there is no change in the transmittance.

6 is a diagram for explaining the structure of the microcapsule 13 of FIG. 4.

Referring to FIG. 6, the microcapsules 13 change the position of the fine particles 16 according to the arrangement position of the electrode located on the transmission surface to determine the transmittance. That is, in the embodiment of the present invention, the electrode is disposed at a vertical, diagonal or horizontal position of the transmission surface in order to control the single fine particles 16 in the microcapsule 13. Here, the electrode may correspond to the first transparent electrode 14 and the second transparent electrode 15 described above.

In the embodiment of FIG. 6, it is assumed that the fine particles 16 are made of positive charges. In the case of 1), a negative (-) electrode and a positive (+) electrode are disposed on the upper and lower sides of the microcapsule 13 in the vertical direction of the transmission surface. Then, the fine particles 16 move toward a negative electrode having a polarity opposite to that of the positive charge.

In the case of 2), a negative (-) electrode and a positive (+) electrode are disposed on the diagonal side of the microcapsule 13 in the diagonal direction of the transmission surface. Then, the fine particles 16 move in a direction in which a negative electrode having a polarity opposite to that of a positive charge is disposed.

In the case of 3), a positive (+) electrode and a negative (-) electrode are disposed on the left and right sides of the microcapsule 13 in the horizontal direction of the transmission surface. Then, the fine particles 16 move a little further toward the negative electrode having a polarity opposite to that of the positive charge.

Accordingly, the degree of freedom of the fine particles 16 can be increased. Depending on the embodiment, the number and direction of the electrodes may vary.

7 is a diagram for explaining the operation of the microcapsule 13 of FIG. 6.

Referring to FIG. 7, when electrodes are disposed in the microcapsules 13 as 1), 2), and 3), the transmittance can be changed.

For example, in the case of 1), light may be blocked by arranging the position of the fine particles 16 in the same direction as the transmission surface. In the case of 2), the fine particles 16 are arranged so as to form a certain angle with the transmission surface so that a part of the light source is transmitted and the other part is scattered or reflected according to the properties of the fine particles 16. In the case of 3), voltage is applied so that the fine particles 16 can be disposed in a direction perpendicular to the transmission surface so that most of the light can be transmitted.

In other words, in the embodiment of the present invention, it can be seen that the transmittance is changed according to the number of visible fine particles 16 in the microcapsule 13 when the transmission surface is viewed from the front.

8 is another embodiment of the microcapsule 13 of FIG. 4.

Referring to FIG. 8, the microcapsule 13 can control transmittance by using a potential difference between four electrodes. According to an exemplary embodiment of the present invention, the transmittance may be controlled by using a potential difference through an electrode located around the microcapsule 13.

As shown in FIG. 8, when the direction of the potential is expressed as a vector, a potential difference occurs in the microcapsules 13 according to the direction of the vector. The positions of the fine particles 16 are controlled by this potential difference. Voltages applied to electrodes 1, 2, 3, and 4 will be defined as V1, V2, V3, and V4, respectively.

For example, as in (C), it is assumed that the values of the voltages V1 and V2 are the same and the values of the voltages V3 and V4 are the same. And, when the values of the voltages V3 and V4 are larger than the values of the voltages V1 and V2 (when V1 = V2 <V3 = V4), the vector (electric field) direction goes to the bottom. Accordingly, it is possible to minimize the transmittance by positioning the fine particles 16 in the same direction as the transmission surface. (The direction of the vector is perpendicular to the transmission surface).

According to another example, as in (D), it is assumed that the voltage value is large in the order of V2, V1, V4, and V3 (in the case of V2<V1<V4<V3). A vector direction is formed from V2 in the direction of V3, which has the largest voltage value. Accordingly, it is possible to adjust the transmittance by making the position of the fine particles 16 have a certain angle with the transmission surface. (The transmittance can be increased than in the case of (C) above).

According to another example, as in (E), it is assumed that the value of the voltage V1 is greater than the voltage V2 and the value of the voltage V3 is greater than the voltage V4. In addition, when the voltages V1 and V4 are the same (in the case of V2<V1 = V4<V3), a vector direction is formed from V2 with the smallest voltage value to V3 with the largest voltage value. Accordingly, it is possible to adjust the transmittance by making the position of the fine particles 16 have a certain angle with the transmission surface. The vector direction is formed at an angle with a larger slope than in the case of (D) above, so that the transmittance can be increased than in the case of (D) above.

According to another example, as in (F), it is assumed that the voltage value is large in the order of V2, V4, V1, and V3 (in the case of V2<V4<V1<V3). A vector direction is formed from the small V2 to the direction V3, which has the largest voltage value. Accordingly, it is possible to adjust the transmittance by making the position of the fine particles 16 have a certain angle with the transmission surface. In the case of (F), the vector direction is formed at an angle with a larger slope than in the case of (E) above, so that the transmittance can be increased compared to the case of (E) above.

According to another example, as in (G), it is assumed that the values of the voltages V2 and V4 are the same, the values of the voltages V1 and V3 are the same, and the value of the voltage V1 is greater than the voltage V4. (V2 = In the case of V4 < V1 = V3) Then, a vector direction is formed from V2 and V4 with the smallest voltage values to V1 and V3 with the largest voltage values. Accordingly, it is possible to adjust the transmittance by making the position of the fine particles 16 have a direction perpendicular to the transmission surface. In the case of (G), since the direction of the vector is at an angle horizontal to the transmission surface, the transmittance can be increased than in the case of (F) above.

As described above, the embodiment of the present invention can switch the vector direction to the left according to the potential difference from the case (C) to the case (G). Then, the position of the fine particles 16 is gradually arranged toward the right side, so that the transmittance can be variously controlled (increased). Depending on the embodiment, the direction of the electric field and the location of the fine particles 16 may vary.

9 is a diagram showing an electrode structure of the microcapsule 13 of FIG. 8.

Referring to FIG. 9, the magnitude of the vector voltage provided to the four electrodes may be applied through the voltage controller 20. Two electrodes to which voltages of vectors V1 and V2 are applied may be disposed on the microcapsule 13. In addition, two electrodes to which voltages of vectors V3 and V4 are applied may be disposed under the microcapsule 13. In the example of FIG. 9, the number of electrodes is described as four, but the number of electrodes may vary according to the embodiment.

10 is a graph for explaining the transmittance linear control level of the transparency variable glass of FIG. 8.

Referring to FIG. 10, according to an exemplary embodiment of the present invention, the transmittance may be linearly controlled as the potential difference increases. It is possible to control the light transmittance to linearly increase from when the fine particles 16 are located at the top (or bottom) to the leftmost (or right).

That is, the microcapsules 13 have light transmittance proportional to a potential difference when a voltage is applied to the electrode. Accordingly, the transparency variable glass 10 can control the linear change between the transparent mode and the opaque mode by controlling the potential difference to change the transmittance.

As described above, in the embodiment of the present invention, the variable transparency glass can be applied to a window device for an autonomous vehicle. For example, vehicle glass is used for windshield glass, sunroof, door window, rear glass, inside mirror, outside mirror, etc. Can be applied.

In this case, it can be implemented without changing the configuration of the glass hardware pre-configured in the existing vehicle, and it is possible to improve marketability while minimizing an increase in cost without deteriorating performance. In addition, it is possible to improve technical and product competitiveness by adding a polarization function.

That is, according to the environment (eg, weather, sunlight), the transmittance of the vehicle glass can be automatically changed with a simple switch operation, thereby automatically blocking sunlight from hitting the window. In addition, by establishing a privacy zone in an autonomous vehicle, it is possible to protect occupants from the external environment and reflect the needs of consumers.

In addition, the embodiment of the present invention can reduce the cost by replacing the electric curtain and tinting for a vehicle. And, it is possible to save energy by reducing the amount of use of the air conditioner. This embodiment of the present invention can be applied to a privacy zone, energy saving, or an elegant&invisible area.

In addition, the embodiment of the present invention is a product that replaces blinds and curtains (automobile smart window field, office building, green house, commercial and residential building, greenhouse, security, privacy building, briefing room, conference room, video PR room, situation center room Etc.), it can be used as a product that replaces blinds and curtains by implementing glass that has a variable transmittance.

Additionally, embodiments of the present invention may be used in eco-friendly energy reduction projects. For example, it is applied to eco-friendly buildings (realization of a living space that automatically blocks sunlight from the windows) to save lighting, heating, and cooling energy, and to solar power generation and power conversion through the application of polysilicon inside the glass. Eco-friendly energy technology can be implemented.

Those skilled in the art to which the present invention pertains, since the present invention may be implemented in other specific forms without changing the technical spirit or essential features thereof, the embodiments described above are illustrative in all respects and should be understood as non-limiting. Only do it. The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. .

Claims (16)

A first electrode provided with a first transparent electrode on the inner surface;
A second electrode provided with a second transparent electrode on the inner surface; And
Microparticles provided between the first electrode and the second electrode and controlling the transmittance of incident light by changing positions of fine particles having a single polarity in response to voltages applied to the first and second transparent electrodes. Transparency variable glass containing capsules. The method of claim 1, wherein the microcapsules
The fine particles filled with colored particles; And
Variable transparency glass comprising a filler filled in the microcapsules so that the fine particles can float. The method of claim 1,
The first transparent electrode and the second transparent electrode are positioned in a direction perpendicular to a transmission surface of the incident light and have different polarities. The method of claim 3, wherein the fine particles are
Variable transparency glass moving toward one of the first and second transparent electrodes having opposite polarities. The glass according to claim 3, wherein the incident light is blocked when the positions of the fine particles move in the same direction as the transmission surface. The method of claim 1,
The first transparent electrode and the second transparent electrode are disposed in a diagonal direction to a transmission surface of the incident light, and have different polarities. The method of claim 6, wherein the fine particles are
Variable transparency glass moving toward one of the first and second transparent electrodes having opposite polarities. The glass according to claim 6, wherein when the positions of the fine particles move in a direction forming a predetermined angle with the transmission surface, only a part of the incident light is transmitted. The method of claim 1,
The first transparent electrode and the second transparent electrode are positioned in a direction horizontal to a transmission surface of the incident light and have different polarities. The method of claim 9, wherein the fine particles
Variable transparency glass moving toward one of the first and second transparent electrodes having opposite polarities. The glass according to claim 9, wherein when the positions of the fine particles move in a direction perpendicular to the transmission surface, the incident light is transmitted through the glass with variable transparency. The method of claim 1,
The voltage is a variable transparency glass having a linear voltage level. A first electrode to which a first voltage is applied;
A second electrode to which a second voltage is applied;
A third electrode to which a third voltage is applied;
A fourth electrode to which a fourth voltage is applied; And
A microcapsule provided between the first electrode to the fourth electrode and configured to control the transmittance of incident light by changing positions of fine particles having a single polarity in response to a potential difference between the first voltage to the fourth voltage. Transparency variable glass. The method of claim 13, wherein the microcapsules
The fine particles filled with colored particles; And
Variable transparency glass comprising a filler filled in the microcapsules so that the fine particles can float. The method of claim 13,
A variable transparency glass in which a vector direction is formed in response to the potential difference and the positions of the fine particles are changed according to the vector direction. The method of claim 15,
Transparency variable glass in which an electric field is formed according to a potential difference between the first voltage to the fourth voltage to determine the vector direction.

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