KR20190011398A - Transparent display device - Google Patents

Abstract

The present invention provides a transparent display device capable of preventing a diffraction pattern from occurring. According to one embodiment of the present invention, the transparent display device comprises: a transparent display panel including transmission regions for transmitting incident light and light emitting regions for emitting light; and a lens panel disposed on a front surface of the transparent display panel and including a plurality of lenses disposed to correspond to the transmission regions. The lens panel passes or refracts light transmitted through the transmission region of the transparent display panel.

Description

Transparent Display Device {TRANSPARENT DISPLAY DEVICE}

An embodiment of the present invention relates to a transparent display device.

Recently, as the information age is approaching, a display field for processing and displaying a large amount of information has been rapidly developed, and various display devices have been developed in response to this. Specific examples of such a display device include a liquid crystal display device (LCD), a plasma display panel (PDP), a field emission display device (FED), an electroluminescent display device An electroluminescence display device (ELD), and an organic light emitting diode (OLED).

In recent years, display devices have been made thinner, lighter, and lower in power consumption, and the application fields of display devices are continuously increasing. In particular, display devices are used as one of the user interfaces in most electronic devices and mobile devices.

In recent years, studies have been made actively on a transparent display device which allows a user to view an object or a background located on the back side of the display device. The transparent display device has advantages of space utilization, interior and design, and can have various application fields. The transparent display device realizes the functions of information recognition, information processing, and information display in a transparent electronic device, thereby solving the spatial and visual restrictions of the existing electronic device. For example, the transparent display device may be implemented as a smart window that is applied to a building or a car window to display a background or display an image.

The transparent display device has a light emitting region and a transmissive region, and transmits light to the transmissive region. At this time, since the transmissive region is disposed between the light emitting regions, light passing through the transmissive region can be diffracted. In the daytime, diffraction patterns due to diffracted light are not observed because light enters from all directions in the daytime, but diffraction patterns due to diffracted light are observed in the nighttime because straight-ahead light enters in certain directions.

In addition, the transparent display device can be realized as an organic light emitting display device, and in this case, power consumption is small. However, in a dark environment, for example, at night, there is no problem with the contrast ratio, but there is a disadvantage that the contrast ratio is lowered in a light environment, for example, during the daytime. The contrast ratio of the dark environment can be defined as dark room contrast ratio, and the contrast ratio of light environment can be defined as bright room contrast ratio. That is, since the transparent display device has a transmissive area in order to make it possible to see an object or a background located on the rear surface, there is a problem that the bright-room contrast ratio is lowered.

The present invention provides a transparent display device in which a diffraction pattern is not generated.

In addition, the present invention provides a transparent display device capable of preventing the contrast ratio from being lowered in a light environment.

A transparent display device according to an embodiment of the present invention includes a transparent display panel including transmission regions for transmitting incident light and light emission regions for emitting light, And a lens panel including a plurality of lenses arranged in a straight line. The lens panel passes or refracts the light transmitted through the transparent area of the transparent display panel.

The present invention can prevent a diffraction pattern from being generated due to the diffracted light passing through the transmissive region by disposing the lens panel on the entire surface of the transparent display panel.

In addition, according to the present invention, the light control panel is disposed on the back surface of the transparent display panel, so that the bright-room contrast ratio can be prevented from being lowered by the transparent region of the transparent display panel.

The effects obtained in the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description .

1 is a perspective view showing a transparent display device according to a first embodiment of the present invention.
FIG. 2 is a plan view showing a transparent display panel, a gate driver, a source drive IC, a flexible film, a display circuit board, and a timing controller of a transparent display device according to a first embodiment of the present invention.
3 is an exemplary view showing pixels of the display area of FIG.
4 is a cross-sectional view taken along line I-I 'of Fig. 3;
5 is a perspective view showing a lens panel according to an embodiment of the present invention.
6A and 6B are cross-sectional views illustrating a lens panel according to a first embodiment of the present invention.
7A and 7B are cross-sectional views illustrating a lens panel according to a second embodiment of the present invention.
8A and 8B are cross-sectional views illustrating a lens panel according to a third embodiment of the present invention.
9A and 9B are cross-sectional views illustrating a lens panel according to a fourth embodiment of the present invention.
10A and 10B are cross-sectional views illustrating a lens panel according to a fifth embodiment of the present invention.
11 is a perspective view showing a transparent display device according to a second embodiment of the present invention.
12A and 12B are cross-sectional views showing an example of the transparent display device of FIG.
13 is a cross-sectional view showing another example of the transparent display device of Fig.
14 is a sectional view for explaining a lens of a lens panel.
15 is an enlarged view of area A in Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. To fully disclose the scope of the invention to a person skilled in the art, and the invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Where the terms "comprises," "having," "consisting of," and the like are used in this specification, other portions may be added as long as "only" is not used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

In the case of a description of a temporal relationship, for example, if the temporal relationship is described by 'after', 'after', 'after', 'before', etc., May not be continuous unless they are not used.

The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical spirit of the present invention.

The terms "X-axis direction "," Y-axis direction ", and "Z-axis direction" should not be construed solely by the geometric relationship in which the relationship between them is vertical, It may mean having directionality.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, May refer to any combination of items that may be presented from more than one.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other, partially or wholly, technically various interlocking and driving, and that the embodiments may be practiced independently of each other, It is possible.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a transparent display device according to a first embodiment of the present invention. 2 is a plan view showing a transparent display panel, a gate driver, a source drive IC, a flexible film, a display circuit board, and a timing controller of a transparent display device according to an embodiment of the present invention. 3 is an exemplary view showing pixels of the display area of FIG. 4 is a cross-sectional view taken along line I-I 'of Fig. 3; 5 is a perspective view showing a lens panel according to an embodiment of the present invention.

Hereinafter, a transparent display device according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4. FIG. In FIGS. 1 to 4, the X-axis represents the direction parallel to the gate lines, the Y-axis represents the direction parallel to the data lines, and the Z-axis represents the height direction of the transparent display device.

1 to 4, a transparent display device according to an embodiment of the present invention includes a transparent display panel 100, a gate driver 120, a source driver IC (integrated circuit) 130 A flexible film 140, a display circuit board 150, a timing control unit 160, a lens panel 200, and an adhesive layer 300.

Although the transparent display device according to the embodiment of the present invention has been described with reference to the organic light emitting display device, the transparent display device may include a liquid crystal display device, a Quantum dot Lighting Emitting Diode ) Or an electrophoresis display device.

The transparent display panel 100 includes a lower substrate 111 and an upper substrate 112 facing each other. The upper substrate 112 may be an encapsulating substrate. The lower substrate 111 is formed to be larger than the upper substrate 112 so that a part of the lower substrate 111 can be exposed without being covered by the upper substrate 112.

The transparent display panel 100 transmits incident light or displays an image. Gate lines and data lines are formed in the display area DA of the transparent display panel 100, and pixels may be formed in the intersecting areas of the gate lines and the data lines. The pixels of the display area DA can display an image.

The display area DA includes a transmissive area TA and a light-emitting area EA as shown in Fig. The transparent display panel 100 can see an object or a background located on the back side of the transparent display panel 100 due to the transmissive areas TA and can display an image due to the light emitting areas EA . In FIG. 3, the transmissive area TA and the light emitting area EA are elongated in the gate line direction (X-axis direction). However, the present invention is not limited thereto. That is, the transmissive area TA and the light emitting area EA may be formed long in the data line direction (Y-axis direction).

The transmissive area TA is an area through which the incident light almost passes. The light emitting region EA is a region for emitting light. The light emitting region EA may include a plurality of pixels P and each of the pixels P may include a red light emitting portion RE, a green light emitting portion GE, and a blue light emitting portion BE, But the present invention is not limited thereto. For example, each of the pixels P may further include a white light emitting portion in addition to the red light emitting portion RE, the green light emitting portion GE, and the blue light emitting portion BE. Alternatively, each of the pixels P may include a red light emitting portion RE, a green light emitting portion GE, a blue light emitting portion BE, a yellow light emitting portion, a magenta light emitting portion, and a cyan light emitting portion At least two light emitting portions may be included in the portion.

The red light emitting portion RE is a region for emitting red light, the green light emitting portion GE is a region for emitting green light, and the blue light emitting portion BE is a region for emitting blue light. The red light emitting portion RE, the green light emitting portion GE, and the blue light emitting portion BE of the light emitting region EA emit predetermined light and correspond to a non-transmissive region that does not transmit incident light.

(T), an anode electrode (AND), an organic layer (EL), and a cathode electrode (CAT) are provided in each of the red light emitting portion RE, the green light emitting portion GE and the blue light emitting portion BE .

The transistor T includes an active layer ACT provided on the lower substrate 111, a first insulating film I1 provided on the active layer ACT, a gate electrode GE provided on the first insulating film I1, A second insulating film I2 provided on the electrode GE and a source electrode connected to the active layer ACT through the first and second contact holes CNT1 and CNT2 provided on the second insulating film I2 SE and a drain electrode DE. In FIG. 4, the transistor T is formed in a top gate manner. However, the present invention is not limited thereto. The bottom gate type in which the gate electrode GE is disposed under the active layer ACT may be formed.

The anode electrode AND is connected to the drain electrode DE of the transistor T through the third contact hole CNT3 passing through the interlayer insulating film ILD provided on the source electrode SE and the drain electrode DE . A bank B is provided between the adjacent anode electrodes (AND), so that the adjacent anode electrodes (AND) can be electrically isolated.

An organic layer EL is provided on the anode electrode AND. The organic layer EL may include a hole transporting layer, an organic light emitting layer, and an electron transporting layer. A cathode electrode (CAT) is provided on the organic layer (EL) and the bank (B). When a voltage is applied to the anode electrode (AND) and the cathode electrode (CAT), holes and electrons move to the organic light emitting layer through the hole transporting layer and the electron transporting layer, respectively.

In FIG. 4, the transparent display panel 100 is implemented by a top emission method. However, the present invention is not limited to this, and it may be implemented by a bottom emission method. The lens panel 200 is preferably disposed in a direction in which the transparent display panel 100 emits light. Therefore, in the front emission type, the lens panel 200 is disposed above the transparent display panel 100, that is, on the upper substrate 112, and in the bottom emission type, below the transparent display panel 100, As shown in Fig.

In the top emission type, since the light of the organic layer EL emits in the direction of the upper substrate 112, the transistor T may be provided broadly below the bank B and the anode electrode AND. Accordingly, the front emission type has an advantage that the design area of the transistor T is wider than that of the back emission type. In the front emission type, it is preferable that the anode electrode (AND) is formed of a metal material having a high reflectivity such as aluminum, a laminate structure of aluminum and ITO, and the cathode electrode (CAT) is formed of a transparent metal material such as ITO or IZO. The cathode electrode CAT may be formed of Ag, Ti, Al, Mo, or Ag, which is thinly formed to a thickness of several hundreds of angstroms or less. ) And an alloy of magnesium (Mg). In this case, the cathode electrode (CAT) becomes a semi-transparent layer and can be used as a substantially transparent cathode.

As described above, the transparent display panel 100 of the transparent display device according to the embodiment of the present invention includes a transmissive area TA through which incident light is almost passed, and a light emitting area EA that emits light . As a result, embodiments of the present invention can view objects or backgrounds located behind the transparent display device through the transmission areas TA of the transparent display device.

The gate driver 120 supplies the gate signals to the gate lines according to the gate control signal input from the timing controller 160. In FIG. 2, the gate driver 120 is formed on the outside of one side of the display area DA of the transparent display panel 100 in a gate driver in panel (GIP) manner, but the present invention is not limited thereto. That is, the gate driver 120 may be formed on the outside of both sides of the display area DA of the transparent display panel 100 by a GIP method, or may be mounted on a flexible film, To the transparent display panel 100 as shown in FIG.

The source driver IC 130 receives the digital video data and the source control signal from the timing controller 160. The source driver IC 130 converts the digital video data into analog data voltages according to the source control signal and supplies the analog data voltages to the data lines. When the source drive IC 130 is fabricated from a driving chip, the source drive IC 130 may be mounted on the flexible film 140 using a chip on film (COF) method or a chip on plastic (COP) method.

Since the size of the lower substrate 111 is larger than that of the upper substrate 112, a part of the lower substrate 111 can be exposed without being covered by the upper substrate 112. Display pads are provided on a part of the lower substrate 111 that is not covered by the upper substrate 112 and is exposed. The display pads may be data pads.

Wires connecting the display pads and the source drive IC 130 and wirings connecting the display pads and the wires of the display circuit board 150 may be formed on the flexible film 140. The flexible film 140 is attached on the display pads using an anisotropic conducting film, whereby the display pads and the wirings of the flexible film 140 can be connected.

The display circuit board 150 may be attached to the flexible films 140. The display circuit board 150 can be mounted with a plurality of circuits implemented with driving chips. For example, the timing control unit 160 may be mounted on the display circuit board 150. The display circuit board 150 may be a printed circuit board or a flexible printed circuit board.

The timing controller 160 receives digital video data and a timing signal from an external system board (not shown). The timing control unit 160 generates a gate control signal for controlling the operation timing of the gate driving unit 120 and a source control signal for controlling the source drive ICs 130 based on the timing signal. The timing controller 160 supplies a gate control signal to the gate driver 120 and a source control signal to the source driver ICs 130. [

The lens panel 200 is disposed on the front surface of the transparent display panel 100, and allows the light passing through the transmissive area TA to pass through or refract. For this, the lens panel 200 includes a first substrate 210, a second substrate 220, a first electrode 230, a second electrode 240, and a lens layer 250.

Each of the first and second substrates 210 and 220 may be a glass or a plastic film. For example, each of the first and second substrates 210 and 220 may be a plastic film such as a cellulose resin such as TAC (triacetyl cellulose) or DAC (diacetyl cellulose), a Norbornene derivatives (Cycloolefin polymer), COC (cyclo olefin copolymer), acrylic resin such as poly (methylmethacrylate), PC (polycarbonate), PE (polyethylene) polyesters such as polyolefin, polyvinyl alcohol (PVA), polyether sulfone (PES), polyetheretherketone (PEEK), polyetherimide (PEI), polyethylenenaphthalate (PEN) polysulfone, fluoride resin, or the like. The first substrate 210 may be omitted.

A first electrode 230 is formed on one surface of the first substrate 210 and a second electrode 240 is formed on a surface of the second substrate 220 facing the first substrate 210. Each of the first and second electrodes 230 and 240 may be a transparent electrode, and the alignment direction of the liquid crystal molecules included in the lens layer 250 may be controlled depending on whether a voltage is applied or not. The first and second electrodes 230 and 240 may be formed in various patterns so as to determine the directionality of the liquid crystal.

Each of the first and second electrodes 230 and 240 may be formed of a metal oxide such as AgO or Ag2O or Ag2O3, an aluminum oxide such as Al2O3, a tungsten oxide such as WO2 or WO3 or W2O3, MgO), molybdenum oxide (eg MoO3), zinc oxide (eg ZnO), tin oxide (eg SnO2), indium oxide (eg In2O3), chromium oxide (eg CrO3 or Cr2O3), antimony oxide (E.g., Sb2O3 or Sb2O5), titanium oxides such as TiO2, nickel oxides such as NiO, copper oxides such as CuO or Cu2O, vanadium oxides such as V2O3 or V2O5, (Eg, Fe2O3 or Fe3O4), niobium oxide (eg Nb2O5), indium tin oxide (eg ITO), indium zinc oxide (eg Indium Zinc Oxide, IZO), aluminum doped zinc oxide Aluminum-doped Zinc Oxide (ZAO), aluminum-doped tin oxide (eg, aluminum tin oxide) or antimony tin oxide (eg, antimony tin oxide) However, it not limited to this.

The lens layer 250 includes a plurality of lenses disposed corresponding to the transmissive region TA and is formed of a material that passes through the transmissive region TA according to whether an electric field is formed by the first and second electrodes 230 and 240 Light can pass through or refract as it is. The lens layer 250 will be described in detail later with reference to FIGS. 5 to 9. FIG.

The adhesive layer (300) bonds the transparent display panel (100) and the lens panel (200). The adhesive layer 300 may be a transparent adhesive such as OCA (optically clear adhesive) or a transparent adhesive such as OCR (optically clear resin).

Hereinafter, the lens panel 200 according to various embodiments will be described in more detail.

1st Example

6A and 6B are cross-sectional views illustrating a lens panel according to a first embodiment of the present invention.

6A and 6B, the lens panel 200 according to the first embodiment of the present invention includes a first substrate 210, a second substrate 220, a first electrode 230, a second electrode 240 And a lens layer 250. The first substrate 210, the second substrate 220, the first electrode 230 and the second electrode 240 of the lens panel 200 according to the first embodiment of the present invention are the same as those described with reference to FIG. 5 They are substantially the same, so a detailed description thereof will be omitted.

The lens layer 250 is disposed between the first electrode 230 and the second electrode 240 and includes a plurality of lenses L according to whether the electric field is formed by the first and second electrodes 230 and 240 do. To this end, the lens layer 250 comprises a plurality of lenses L consisting of a horizontal alignment film 251, an anisotropic material layer 252 and an isotropic material layer 253.

The horizontal alignment film 251 is disposed on the first electrode 230. The horizontal alignment layer 251 aligns the liquid crystals included in the anisotropic material layer 252 in the horizontal direction (X-axis direction or Y-axis direction) when no voltage is applied to each of the first and second electrodes 230 and 240 .

The anisotropic material layer 252 is disposed between the plurality of lenses L and includes a liquid crystal having optical anisotropy, for example, positive liquid crystals LC1. The anisotropic material layer 252 aligns the positive liquid crystals LC1 according to whether the voltage is applied to the first and second electrodes 230 and 240, and the refractive index is changed according to the oriented direction.

More specifically, if no voltage is applied to the first and second electrodes 230 and 240, the positive liquid crystals LC1 of the anisotropic material layer 252 are horizontally oriented Direction or a Y-axis direction). At this time, the refractive index of the anisotropic material layer 252 is the refractive index n _{e in} the major axis direction of the positive liquid crystals LC1.

On the other hand, when a voltage is applied to each of the first and second electrodes 230 and 240, the positive liquid crystals LC1 of the anisotropic material layer 252 are arranged in the vertical direction (Z-axis direction). At this time, the refractive index of the anisotropic material layer 252 becomes the uniaxial refractive index n _o of the positive liquid crystals LC1.

A plurality of lenses L are disposed between the horizontal alignment film 251 and the second electrode 240 and are arranged corresponding to the transmissive area TA. The plurality of lenses (L) have a convex shape with the lower surface facing the transparent display panel (100).

The plurality of lenses L are made of an isotropic material layer 253. The isotropic material layer 253 may comprise a material having optical isotropy, for example, a resin. At this time, the refractive index n _resin of the isotropic material layer 253 is substantially equal to the refractive index n _e of the long axis direction of the positive liquid crystals LC 1 included in the anisotropic material layer 252.

The plurality of lenses L may pass or refract light passing through the transmissive region TA as it is, depending on the refractive index of the layer 252 and the refractive index of the layer 253.

More specifically, if no voltage is applied to the first and second electrodes 230 and 240, the refractive index of the anisotropic material layer 252 becomes the refractive index n _e of the long axis direction of the positive liquid crystals LC 1. Since the refractive index n _resin of the isotropic material layer 253 is equal to the refractive index n _e of the long axis direction of the positive liquid crystals LC1, the refractive index n _{e of the} anisotropic material layer 252 and the refractive index n _e of the isotropic material layer 253 The refractive index (n _resin ) is the same. Accordingly, the plurality of lenses L can pass the light passing through the transmission area TA without refraction.

On the other hand, when a voltage is applied to the first and second electrodes 230 and 240, the refractive index of the anisotropic material layer 252 becomes the uniaxial refractive index n _o of the positive LCs LC1. The refractive index n oz of the anisotropic material layer 252 and the refractive index n _o of the isotropic material layer 253 are equal to each other because the refractive index n _resin of the isotropic material layer 253 is equal to the refractive index n _e of the long axis direction of the positive liquid- The refractive index (n _resin ) is different. The refractive index n _o of the anisotropic material layer 252 becomes smaller than the refractive index n _resin of the isotropic material layer 253 so that the plurality of lenses L can refract light passing through the transmissive region TA .

In the lens panel 200 according to the first embodiment of the present invention, whether or not a voltage is applied to the first and second electrodes 230 and 240 may be determined by a user's selection, but is not limited thereto. The lens panel 200 according to the first embodiment of the present invention can be applied to the first and second electrodes 240 and 240 in a bright environment such as the first and second electrodes 240 and 240 in a dark environment, A voltage may be applied to the second electrodes 240 and 240. In the daytime, since light enters from all directions, a diffraction pattern due to the diffracted light does not occur, so that the lens panel 200 can pass the light passing through the transmission area TA without refraction. On the other hand, at night, diffracted light due to diffracted light may occur because a straight light enters in a specific direction. In order to prevent this, the lens panel 200 applies a voltage to the first and second electrodes 240 and 240 to refract the diffracted light while passing through the transmission area TA, so that the light can proceed in the straight direction do. Accordingly, the lens panel 200 according to the first embodiment of the present invention can prevent a diffraction pattern caused by light passing through the transmissive area TA at night from occurring.

Second Example

7A and 7B are cross-sectional views illustrating a lens panel according to a second embodiment of the present invention.

7A and 7B, a lens panel 200 according to a second exemplary embodiment of the present invention includes a first substrate 210, a second substrate 220, a first electrode 230, a second electrode 240 And a lens layer 250. The first substrate 210, the second substrate 220, the first electrode 230, and the second electrode 240 of the lens panel 200 according to the second embodiment of the present invention are the same as those described with reference to FIG. 5 They are substantially the same, so a detailed description thereof will be omitted.

The lens layer 250 is disposed between the first electrode 230 and the second electrode 240 and includes a plurality of lenses L according to whether the electric field is formed by the first and second electrodes 230 and 240 do. To this end, the lens layer 250 comprises a plurality of lenses L consisting of a horizontal alignment film 251, an isotropic material layer 253 and an anisotropic material layer 252. [

The horizontal alignment film 251 is disposed on the first electrode 230. The horizontal alignment layer 251 aligns the liquid crystals included in the anisotropic material layer 252 in the horizontal direction (X-axis direction or Y-axis direction) when no voltage is applied to each of the first and second electrodes 230 and 240 .

The isotropic material layer 253 is disposed between the plurality of lenses L and may include a material having optical isotropy, for example, resin. The refractive index n _resin of the isotropic material layer 253 is substantially equal to the uniaxial refractive index n _o of the positive liquid crystals LC1 included in the anisotropic material layer 252. [

A plurality of lenses L are disposed between the horizontal alignment film 251 and the second electrode 240 and are arranged corresponding to the transmissive area TA. The plurality of lenses (L) have a convex shape with the lower surface facing the transparent display panel (100).

The plurality of lenses L may be formed of an anisotropic material layer 252. The anisotropic material layer 252 may include a liquid crystal having optical anisotropy, for example, positive liquid crystals LC1. The anisotropic material layer 252 aligns the positive liquid crystals LC1 according to whether the voltage is applied to the first and second electrodes 230 and 240, and the refractive index is changed according to the oriented direction.

More specifically, if no voltage is applied to the first and second electrodes 230 and 240, the positive liquid crystals LC1 of the anisotropic material layer 252 are horizontally oriented Direction or a Y-axis direction). At this time, the refractive index of the anisotropic material layer 252 is the refractive index n _{e in} the major axis direction of the positive liquid crystals LC1.

On the other hand, when a voltage is applied to each of the first and second electrodes 230 and 240, the positive liquid crystals LC1 of the anisotropic material layer 252 are arranged in the vertical direction (Z-axis direction). At this time, the refractive index of the anisotropic material layer 252 becomes the uniaxial refractive index n _o of the positive liquid crystals LC1.

The plurality of lenses L may pass or refract light passing through the transmissive region TA as it is, depending on the refractive index of the layer 252 and the refractive index of the layer 253.

More specifically, when a voltage is applied to the first and second electrodes 230 and 240, the refractive index of the anisotropic material layer 252 becomes the uniaxial refractive index n _o of the positive liquid crystals LC1. Since the refractive index n _resin of the isotropic material layer 253 is equal to the uniaxial refractive index n _o of the positive liquid crystal LC1, the refractive index n _{o of the} anisotropic material layer 252 and the refractive index n _o of the isotropic material layer 253 The refractive index (n _resin ) is the same. Accordingly, the plurality of lenses L can pass the light passing through the transmission area TA without refraction.

On the other hand, if no voltage is applied to the first and second electrodes 230 and 240, the refractive index of the anisotropic material layer 252 becomes the refractive index n _e of the long axis direction of the positive LCs LC1. Since the refractive index n _resin of the isotropic material layer 253 is equal to the uniaxial refractive index n _o of the positive liquid crystal LC1, the refractive index n _e of the anisotropic material layer 252 and the refractive index n _e of the isotropic material layer 253 The refractive index (n _resin ) is different. The refractive index n _e of the anisotropic material layer 252 is greater than the refractive index n _resin of the isotropic material layer 253 so that the plurality of lenses L can refract light passing through the transmissive region TA .

In the lens panel 200 according to the second embodiment of the present invention, whether or not a voltage is applied to the first and second electrodes 230 and 240 may be determined by a user's selection, but is not limited thereto. The lens panel 200 according to the second embodiment of the present invention is configured such that the first and second electrodes 240 and 240 are applied with a voltage in a bright environment such as a day, The voltage may not be applied to the two electrodes 240 and 240. In the daytime, since light enters from all directions, a diffraction pattern due to the diffracted light does not occur, so that the lens panel 200 can pass the light passing through the transmission area TA without refraction. On the other hand, at night, diffracted light due to diffracted light may occur because a straight light enters in a specific direction. In order to prevent this, the lens panel 200 refracts the diffracted light while passing through the transmissive area TA without applying a voltage to the first and second electrodes 240 and 240, . Accordingly, the lens panel 200 according to the second embodiment of the present invention can prevent a diffraction pattern caused by light passing through the transmissive area TA at night from being generated.

Third Example

8A and 8B are cross-sectional views illustrating a lens panel according to a third embodiment of the present invention.

8A and 8B, a lens panel 200 according to a third exemplary embodiment of the present invention includes a first substrate 210, a second substrate 220, a first electrode 230, a second electrode 240 And a lens layer 250. The first substrate 210, the second substrate 220, the first electrode 230 and the second electrode 240 of the lens panel 200 according to the third embodiment of the present invention are the same as those described with reference to FIG. 5 They are substantially the same, so a detailed description thereof will be omitted.

The lens layer 250 is disposed between the first electrode 230 and the second electrode 240 and includes a plurality of lenses L according to whether the electric field is formed by the first and second electrodes 230 and 240 do. To this end, the lens layer 250 comprises a plurality of lenses L consisting of a vertical alignment layer 254, an anisotropic material layer 255, and an isotropic material layer 256.

The vertical alignment film 254 is disposed on the first electrode 230. The vertical alignment layer 254 functions to align the liquid crystals included in the anisotropic material layer 255 in the vertical direction (Z-axis direction) when no voltage is applied to the first and second electrodes 230 and 240 .

The anisotropic material layer 255 is disposed between the plurality of lenses L and includes a liquid crystal having optical anisotropy, for example, a negative liquid crystal LC2. The anisotropic material layer 255 is aligned with the negative liquid crystal LC2 depending on whether a voltage is applied to the first and second electrodes 230 and 240 and the refractive index is changed according to the oriented direction.

More specifically, if no voltage is applied to the first and second electrodes 230 and 240, the negative liquid crystals LC2 of the anisotropic material layer 255 are aligned in the vertical direction Direction). At this time, the refractive index of the anisotropic material layer 255 becomes the uniaxial refractive index n _o of the negative liquid crystals LC2.

On the other hand, when a voltage is applied to each of the first and second electrodes 230 and 240, the negative liquid crystals LC2 of the anisotropic material layer 255 are arranged in the horizontal direction (X axis direction or Y axis direction). At this time, the refractive index of the anisotropic material layer 255 becomes the refractive index n _e of the long axis direction of the negative liquid crystals LC 2.

A plurality of lenses L are disposed between the vertical alignment film 254 and the second electrode 240 and disposed corresponding to the transmissive area TA. The plurality of lenses (L) have a convex shape with the lower surface facing the transparent display panel (100).

The plurality of lenses L are made of an isotropic material layer 256. The isotropic material layer 256 may comprise a material having optical isotropy, such as a resin. At this time, the refractive index n _resin of the isotropic material layer 256 is substantially equal to the refractive index n _e of the long axis direction of the negative liquid crystals LC 2 included in the anisotropic material layer 255.

The plurality of lenses L may pass or refract light passing through the transmissive region TA as it is, depending on the refractive index of the layer 252 and the refractive index of the layer 253.

More specifically, when a voltage is applied to the first and second electrodes 230 and 240, the refractive index of the anisotropic material layer 255 becomes the refractive index n _{e in} the major axis direction of the negative liquid crystals LC 2. The refractive index n _ee of the anisotropic material layer 256 is equal to the refractive index n _e of the isotropic material layer 256 since the refractive index n _resin of the isotropic material layer 256 is equal to the refractive index n _e of the long axis direction of the negative liquid crystals LC2. The refractive index (n _resin ) is the same. Accordingly, the plurality of lenses L can pass the light passing through the transmission area TA without refraction.

On the other hand, if no voltage is applied to the first and second electrodes 230 and 240, the refractive index of the anisotropic material layer 255 becomes the uniaxial refractive index n _o of the negative liquid crystal LC2. Since the refractive index n _resin of the isotropic material layer 256 is equal to the refractive index n _e of the long axis of the negative liquid crystals LC2, the refractive index n _o of the anisotropic material layer 255 and the refractive index n _o of the isotropic material layer 256 The refractive index (n _resin ) is different. The refractive index n _o of the anisotropic material layer 255 is less than the refractive index n _resin of the isotropic material layer 256 so that the plurality of lenses L can refract light passing through the transmissive region TA .

In the lens panel 200 according to the third embodiment of the present invention, whether or not a voltage is applied to the first and second electrodes 230 and 240 may be determined by a user's choice, but is not limited thereto. The lens panel 200 according to the third embodiment of the present invention is configured such that the first and second electrodes 240 and 240 are applied with a voltage in a bright environment, The voltage may not be applied to the two electrodes 240 and 240. In the daytime, since light enters from all directions, a diffraction pattern due to the diffracted light does not occur, so that the lens panel 200 can pass the light passing through the transmission area TA without refraction. On the other hand, at night, diffracted light due to diffracted light may occur because a straight light enters in a specific direction. In order to prevent this, the lens panel 200 refracts the diffracted light while passing through the transmissive area TA without applying a voltage to the first and second electrodes 240 and 240, . Accordingly, the lens panel 200 according to the third embodiment of the present invention can prevent a diffraction pattern caused by light passing through the transmissive area TA at night from being generated.

Fourth Example

9A and 9B are cross-sectional views illustrating a lens panel according to a fourth embodiment of the present invention.

9A and 9B, a lens panel 200 according to a fourth exemplary embodiment of the present invention includes a first substrate 210, a second substrate 220, a first electrode 230, a second electrode 240 And a lens layer 250. The first substrate 210, the second substrate 220, the first electrode 230 and the second electrode 240 of the lens panel 200 according to the fourth embodiment of the present invention are the same as those described with reference to FIG. 5 They are substantially the same, so a detailed description thereof will be omitted.

The lens layer 250 is disposed between the first electrode 230 and the second electrode 240 and includes a plurality of lenses L according to whether the electric field is formed by the first and second electrodes 230 and 240 do. To this end, the lens layer 250 includes a plurality of lenses L consisting of a vertical alignment layer 254, an isotropic material layer 256, and an anisotropic material layer 255.

The vertical alignment film 254 is disposed on the first electrode 230. The vertical alignment layer 254 functions to align the liquid crystals included in the anisotropic material layer 255 in the vertical direction (Z-axis direction) when no voltage is applied to the first and second electrodes 230 and 240 .

The isotropic material layer 256 is disposed between the plurality of lenses L and may include a material having optical isotropy, for example, resin. The refractive index n _resin of the isotropic material layer 256 is substantially equal to the uniaxial refractive index n _o of the negative liquid crystals LC1 included in the anisotropic material layer 255. [

A plurality of lenses L are disposed between the vertical alignment film 254 and the second electrode 240 and disposed corresponding to the transmissive area TA. The plurality of lenses (L) have a convex shape with the lower surface facing the transparent display panel (100).

The plurality of lenses L may be formed of an anisotropic material layer 255. The anisotropic material layer 255 may comprise a liquid crystal having optical anisotropy, for example, a negative liquid crystal LC2. The anisotropic material layer 255 is aligned with the negative liquid crystal LC2 depending on whether a voltage is applied to the first and second electrodes 230 and 240 and the refractive index is changed according to the oriented direction.

More specifically, if no voltage is applied to the first and second electrodes 230 and 240, the negative liquid crystals LC2 of the anisotropic material layer 255 are aligned in the vertical direction Direction). At this time, the refractive index of the anisotropic material layer 255 becomes the uniaxial refractive index n _o of the negative liquid crystals LC2.

On the other hand, when a voltage is applied to each of the first and second electrodes 230 and 240, the negative liquid crystals LC2 of the anisotropic material layer 255 are arranged in the horizontal direction (X axis direction or Y axis direction). At this time, the refractive index of the anisotropic material layer 255 becomes the refractive index n _e of the long axis direction of the negative liquid crystals LC 2.

The plurality of lenses L may pass or refract light passing through the transmissive area TA as it is, depending on the refractive index of the anisotropic material layer 255 and the refractive index difference of the isotropic material layer 256.

More specifically, if no voltage is applied to the first and second electrodes 230 and 240, the refractive index of the anisotropic material layer 255 becomes the uniaxial refractive index n _o of the negative liquid crystal LC2. Since the refractive index n _resin of the isotropic material layer 256 is equal to the uniaxial refractive index n _o of the negative liquid crystal LC2, the refractive index n _{o of the} anisotropic material layer 255 and the refractive index n _o of the isotropic material layer 256 The refractive index (n _resin ) is the same. Accordingly, the plurality of lenses L can pass the light passing through the transmission area TA without refraction.

On the other hand, when a voltage is applied to the first and second electrodes 230 and 240, the refractive index of the anisotropic material layer 255 becomes the refractive index n _e of the long axis direction of the negative liquid crystal LC2. Since the refractive index n _resin of the isotropic material layer 256 is equal to the uniaxial refractive index n _o of the negative liquid crystal LC2, the refractive index n _e of the anisotropic material layer 255 and the refractive index n _e of the isotropic material layer 256 The refractive index (n _resin ) is different. The refractive index n _e of the anisotropic material layer 255 is greater than the refractive index n _resin of the isotropic material layer 253 so that the plurality of lenses L can refract light passing through the transmissive region TA .

In the lens panel 200 according to the fourth embodiment of the present invention, whether or not a voltage is applied to the first and second electrodes 230 and 240 may be determined by a user's selection, but is not limited thereto. The lens panel 200 according to the fourth embodiment of the present invention can be applied to the first and second electrodes 240 and 240 in a bright environment such as the first and second electrodes 240 and 240 in a dark environment, A voltage may be applied to the second electrodes 240 and 240. In the daytime, since light enters from all directions, a diffraction pattern due to the diffracted light does not occur, so that the lens panel 200 can pass the light passing through the transmission area TA without refraction. On the other hand, at night, diffracted light due to diffracted light may occur because a straight light enters in a specific direction. In order to prevent this, the lens panel 200 applies a voltage to the first and second electrodes 240 and 240 and refracts the diffracted light while passing through the transmissive area TA, so that the light advances in the straight direction do. Accordingly, the lens panel 200 according to the fourth embodiment of the present invention can prevent a diffraction pattern caused by light passing through the transmissive area TA at night from being generated.

The above-described transparent display device includes the lens panel 200 according to the first to fourth embodiments, thereby preventing the generation of the diffraction pattern in a dark environment.

The lens panel 200 according to the first to fourth embodiments has a configuration in which the lower surfaces of the plurality of lenses L are convex toward the transparent display panel 100. However, the present invention is not limited thereto. In another embodiment, the lens panel 200 may have a convex shape in a direction opposite to the transparent display panel 100, as shown in FIGS. 10A and 10B.

The transparent display device may further include a light control panel 500 in addition to the transparent display panel 100 and the lens panel 200. Hereinafter, the transparent display device according to the second embodiment of the present invention will be described in detail with reference to FIGS. 11 to 12. FIG.

11 is a perspective view showing a transparent display device according to a second embodiment of the present invention. 12A and 12B are cross-sectional views showing an example of the transparent display device of FIG.

11, 12A and 12B, a transparent display device according to a second embodiment of the present invention includes a transparent display panel 100, a lens panel 200, a first adhesive layer 300, a second adhesive layer 400 And a light control panel 500. The transparent display panel 100, the lens panel 200, and the first adhesive layer 300 of the transparent display device according to the second embodiment of the present invention are substantially the same as those described with reference to Figs. 1 to 5, The redundant description of the function is omitted.

A lens panel 200 may be disposed on a front surface of the transparent display panel 100 and a light control panel 500 may be disposed on a rear surface of the transparent display panel 100. 12A and 12B, the lens panel 200 is shown as the lens panel 200 according to the first embodiment, but the present invention is not limited thereto. The transparent display device according to the second embodiment of the present invention can be applied to all the lens panels 200 according to the first to fourth embodiments described above. Hereinafter, for convenience of explanation, it is assumed that the transparent display device according to the second embodiment of the present invention is applied to the lens panel 200 according to the first embodiment. In addition, since the lens panel 200 of the transparent display device according to the second embodiment of the present invention is substantially the same as that described with reference to FIGS. 6A and 6B, a duplicate description thereof will be omitted.

The first adhesive layer 300 bonds the transparent display panel 100 to the lens panel 200 and the second adhesive layer 400 bonds the transparent display panel 100 and the light control panel 500. The first and second adhesive layers 300 and 400 may be a transparent adhesive such as OCA (optically clear adhesive) or a transparent adhesive such as OCR (optically clear resin).

The light control panel 500 is disposed on the back surface of the transparent display panel 100 to block light incident in the light shielding mode and transmit light incident in the transmission mode. For example, the light control panel 500 may be an electrochromic device, but is not limited thereto. The electrochromic device has an advantage that it can switch from the transmission mode to the light shielding mode or switch from the light shielding mode to the transmission mode with a low driving voltage. In addition, since the electrochromic device is required to apply a voltage only when the mode is switched from the transmissive mode to the light-shielding mode or from the light-shielding mode to the transmissive mode, it is unnecessary to continuously apply the voltage to maintain the transmissive mode or maintain the light- .

The light control panel 500 includes a first base film 510, a second base film 520, a first electrode 530, a second electrode 540, an electrochromic layer 250, a counter layer 260, And an electrolyte layer 270.

Each of the first and second base films 510 and 520 may be a plastic film. For example, each of the first and second base films 510 and 520 may be made of a cellulose resin such as TAC (triacetyl cellulose) or DAC (diacetyl cellulose), a COP such as Norbornene derivatives polyolefin such as cycloolefin polymer, COC (cyclo olefin copolymer), acrylic resin such as poly (methylmethacrylate), PC (polycarbonate), PE (polyethylene) or PP (polypropylene) polyesters such as polyvinyl alcohol, polyether sulfone (PES), polyetheretherketone (PEEK), polyetherimide (PEI), polyethylenenaphthalate (PEN) and polyethyleneterephthalate (PET) A fluoride resin, or the like, but is not limited thereto.

A first electrode 530 is provided on the first base film 510 and a second electrode 540 is provided on the second base film 520. Each of the first electrode 530 and the second electrode 540 may be a transparent electrode.

The transparent electrode may be formed of a metal oxide such as AgO or Ag2O or Ag2O3, an aluminum oxide such as Al2O3, a tungsten oxide such as WO2 or WO3 or W2O3, a magnesium oxide such as MgO, a molybdenum oxide such as MoO3, (Eg ZnO), tin oxide (eg SnO2), indium oxide (eg In2O3), chromium oxide (eg CrO3 or Cr2O3), antimony oxide (eg Sb2O3 or Sb2O5), titanium oxide TiO2), nickel oxides (eg NiO), copper oxides (eg CuO or Cu2O), vanadium oxides such as V2O3 or V2O5, cobalt oxides such as CoO, iron oxides such as Fe2O3 or Fe3O4, Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), Aluminum-doped Zinc Oxide (ZAO), aluminum May be, for example, doped tin oxide (e.g., Aluminum Tin Oxide, TAO) or antimony tin oxide (e.g., Antimony Tin Oxide, ATO) It does not.

Electrochemical redox reaction occurs when a voltage is applied to the first electrode 530 and the second electrode 540 in the electrochromic layer 550, the counter layer 560, and the electrolyte layer 570, The color of the layer 550 is changed.

For example, when a first voltage is applied to the first electrode 530 and a second voltage is applied to the second electrode 540, a reduction reaction occurs in the electrochromic layer 550, and a reduction reaction occurs in the counter layer 560 The reaction takes place. Since the electrochromic layer 550 is changed to a predetermined color such as black by the reduction reaction, the incident light can be shielded. That is, the light control panel 500 can realize a light shielding mode for shielding incident light.

When the second voltage is applied to the first electrode 530 and the first voltage is applied to the second electrode 540, an oxidation reaction occurs in the electrochromic layer 550 and a reduction reaction occurs in the counter layer 560 It happens. Since the electrochromic layer 550 is transparently changed by the oxidation reaction, the incident light can be passed as it is. That is, the light control panel 500 can realize a transmission mode for transmitting incident light. Here, the first voltage may be a negative voltage, and the second voltage may be a positive voltage.

The electrochromic layer 550 is disposed between the first electrode 530 and the second electrode 540. The electrochromic layer 550 may include a core material such as Transparent Conductive Oxides (TCO) and an electrochromic material coupled to the core material. The core material may be TiO2, In2O3, SnO2, RuO2, or a material surface-treated with TiO2 in ITO. The electrochromic material may have a predetermined color by absorbing a predetermined color when a reduction reaction occurs, and may be a transparent material when an oxidation reaction occurs. For example, the electrochromic material may be 1,1'-dibenzyl-4,4'-bipyridinium bistetrafluorborate. In order to enhance the light-shielding function of the electrochromic layer 550, it is preferable that the core material is combined with the electrochromic materials which are colored by the reduction reaction.

A counter layer 560 is provided on the first electrode 530. The counter layer 560 corresponds to a layer that assists the electrochromic layer 550 to facilitate the redox reaction. The counter layer 560 may include a counter material that assumes a predetermined color by absorbing a predetermined color when an oxidation reaction occurs, and is transparently changed by a reduction reaction. The counter material is TMPD (N, N, N ', N'-tetramethyl-1,4-phenylenediamine), TMB (3,3', 5,5'- Tetramethylbenzidine) - Tetramethylbenzidine) or DAB (3,3'-Diaminobenzidine). This counter layer 560 may be omitted.

An electrolyte layer 570 is provided between the electrochromic layer 550 and the counter layer 560. The electrolyte layer 570 may comprise an electrolyte, a polymer, and a UV initiator. The electrolyte may be lithium perchlorate, t-butylammoinum perchlorate, t-butylammoinum-tfluoroborate, or tetrabutylammonium trifluoromethanesulfonate. The polymer may be an acrylate-based, polyester-based, or epoxy-based polymer. The UV initiator may be benzoin ethers, or amines. The electrolyte layer 570 may be formed by applying UV curable liquid in a viscous liquid state. The electrolyte layer 570 provides positive and negative ions so that the electrochromic layer 550 and the counter layer 560 can perform a redox reaction.

The light control panel 500 may be determined to be a light shielding mode or a transmission mode depending on the user's selection, but is not limited thereto. The light control panel 500 may implement a light shielding mode by applying a first voltage to the first electrode 530 and a second voltage to the second electrode 540 in a bright environment, for example, during a day. Thus, the transparent display device of the present invention can prevent the bright-room contrast ratio from being lowered by the transmissive area TA. On the other hand, even if the light control panel 500 implements the light shielding mode, a small amount of light passing through the light control panel 500 may be generated. The light control panel 500 can adjust the light transmittance according to the amount of light. That is, the transparent display device may generate light passing through the transmissive area TA according to the light transmittance of the light control panel 500. The lens panel 200 can pass the light passing through the transmissive area TA without refracting without applying a voltage to the first and second electrodes 240 and 240 during the daytime.

Meanwhile, the light control panel 500 may implement a transmission mode by applying a second voltage to the first electrode 530 and a first voltage to the second electrode 540 in a dark environment, for example, at night. The lens panel 200 applies a voltage to the first and second electrodes 240 and 240 to refract the diffracted light while passing through the transmissive area TA, thereby allowing the light to proceed in the straight direction. Accordingly, the lens panel 200 can prevent a diffraction pattern caused by the diffracted light from passing through the transmissive area TA at night.

12A and 12B, the light control panel 500 is shown as an electrochromic device, but the present invention is not limited thereto. The light control panel 500 includes a first base film 510, a second base film 520, a first electrode 530, a second electrode 540 and a liquid crystal layer 580 as shown in FIG. .

The liquid crystal layer 580 may be a transmissive mode for transmitting incident light and a light shield mode for blocking incident light. The liquid crystal layer 580 may be a dynamic scattering mode liquid cyrstal layer comprising liquid crystals 581, dichroic dyes 582, and ionic materials 583. have. In the dynamic scattering mode, when voltages are applied to the first and second electrodes 530 and 540, liquid crystals and dichroic dyes are randomly moved by ionic materials. In this case, the light incident on the liquid crystal layer 580 can be scattered by the liquid crystals moving randomly or absorbed by the dichroic dyes, so that the light shielding mode can be realized.

14 is a cross-sectional view for explaining a lens of a lens panel, and Fig. 15 is an enlarged view of a region A in Fig.

14 and 15, the plurality of lenses L of the lens panel 200 include upper and lower surfaces, and the lower surface thereof has a convex shape toward the transparent display panel 100. As shown in FIG. The plurality of lenses L may be formed such that each width W1 is greater than the width W2 of the transmissive area TA in order to refract the diffracted light while passing through the transmissive area TA.

The lower surface of the plurality of lenses L includes a curved surface portion La and a flat surface portion Lb. At this time, the planar portion Lb is arranged to correspond to the transmissive region TA and may be formed to have substantially the same area as the transmissive region TA. Here, substantially the same area means not only the same area but also an area in an error range that can occur in the manufacturing process. Light passing through the transmissive area TA is diffracted well near the interface between the transmissive area TA and the luminescent area EA. The plurality of lenses L may form a plane portion Lb corresponding to the transmission region TA so that light traveling in the straight direction without being diffracted through the transmission region TA can be transmitted without refraction.

Meanwhile, the light diffracted near the interface between the transmissive area TA and the light emitting area EA may be refracted by the curved surface La of the plurality of lenses L and proceed in the straight direction.

The curved surface portion La of the plurality of lenses L may be designed to satisfy the following equations.

N _o represents the uniaxial refractive index of the anisotropic material layer 252, and n _e represents the refractive index in the major axis direction of the anisotropic material layer 252. Represents the angle of diffraction of light passing through the transmissive area TA, and? Represents the curved surface angle of the curved surface La. X and a represent curved surface positions of the curved surface portion La. X represents a horizontal distance from the transmissive area TA and a represents a vertical distance from the lower surface of the upper substrate 112 of the transparent display panel 100. [

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, it is to be understood that the present invention is not limited to those embodiments and various changes and modifications may be made without departing from the scope of the present invention. . Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of protection of the present invention should be construed according to the claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

100: Transparent display panel
111: first substrate 112: second substrate
120: Gate driver 130: Source drive IC
140: flexible film 150: display circuit board
160: timing control section 200: lens panel
210: first substrate 220: second substrate
230: first electrode 240: second electrode
250: Lens layer 300: First adhesive layer
400: second adhesive layer 500: light control panel
510: first base film 520: second base film
530: first electrode 540: second electrode
550: electrochromic layer 560: counter layer
570: electrolyte layer

Claims (16)

A transparent display panel including transmissive regions that transmit incident light and emissive regions that emit light; And
And a lens panel disposed on a front surface of the transparent display panel and including a plurality of lenses arranged corresponding to the transmissive areas,
And the lens panel passes or refracts the light transmitted through the transparent region of the transparent display panel. The method according to claim 1,
Wherein the plurality of lenses are convex in the direction of the transparent display panel or convex in the direction opposite to the transparent display panel. The method according to claim 1,
Wherein the plurality of lenses are larger in width than the transmissive region. The method of claim 3,
Wherein the plurality of lenses includes a planar portion and a curved portion,
And the flat portion is disposed to correspond to the transmissive region. The method according to claim 1,
The lens panel includes:
A first substrate and a second substrate facing each other;
A first electrode disposed on one surface of the first substrate;
A second electrode disposed on one surface of the second substrate facing the first electrode; And
And a lens layer disposed between the first electrode and the second electrode, the lens layer having the plurality of lenses disposed thereon. 6. The method of claim 5,
Wherein the plurality of lenses are made of an optically isotropic material. The method according to claim 6,
The lens panel includes:
Further comprising an anisotropic material layer disposed between the plurality of lenses and made of an optically anisotropic material. 8. The method of claim 7,
Wherein the anisotropic material layer comprises liquid crystals,
Wherein the optically isotropic material has a refractive index in the major axis direction of the liquid crystal. 9. The method of claim 8,
Wherein the lens panel further comprises a horizontal alignment film disposed between the first electrode and the lens layer,
The liquid crystals are positive liquid crystals,
When a voltage is not applied to each of the first and second electrodes, light passing through the transmissive region is passed as it is. When a voltage is applied to each of the first and second electrodes, light And the transparent display device. 9. The method of claim 8,
Wherein the lens panel further comprises a vertical alignment film disposed between the first electrode and the lens layer,
The liquid crystals are negative liquid crystals,
When a voltage is applied to each of the first and second electrodes, the light transmitted through the transmissive region is allowed to pass therethrough, and when a voltage is not applied to each of the first and second electrodes, And the transparent display device. 6. The method of claim 5,
Wherein the plurality of lenses are made of an optically anisotropic material. 11. The method of claim 10,
The lens panel includes:
Further comprising an isotropic material layer disposed between the plurality of lenses and made of an optically isotropic material. 13. The method of claim 12,
Wherein the anisotropic material layer comprises liquid crystals,
Wherein the optically isotropic material has a uniaxial refractive index of the liquid crystal. 14. The method of claim 13,
Wherein the lens panel further comprises a horizontal alignment film disposed between the first electrode and the lens layer,
The liquid crystals are positive liquid crystals,
When a voltage is applied to each of the first and second electrodes, the light transmitted through the transmissive region is allowed to pass therethrough, and when a voltage is not applied to each of the first and second electrodes, And the transparent display device. 9. The method of claim 8,
Wherein the lens panel further comprises a vertical alignment film disposed between the first electrode and the lens layer,
The liquid crystals are negative liquid crystals,
When a voltage is not applied to each of the first and second electrodes, light passing through the transmissive region is passed as it is. When a voltage is applied to each of the first and second electrodes, light And the transparent display device. The method according to claim 1,
And a light control panel disposed on a back surface of the transparent display panel and shielding incident light or transmitting incident light.

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