KR20170067001A - Light controlling device, and transparent display device including the same - Google Patents

Abstract

The present invention provides a light control device capable of preventing the first electrode and the second electrode from being short-circuited when the second base film is bended in one lateral direction of the light control device, and a transparent display device including the same do.
A light control device according to an embodiment of the present invention includes a first base film having a first projection, a second base film having a second projection, and a liquid crystal layer disposed between the first and second base films , The first projecting portion is not covered by the second base film, and the second projecting portion is not covered by the first base film.

Description

TECHNICAL FIELD [0001] The present invention relates to a light control device and a transparent display device including the light control device,

An embodiment of the present invention relates to a light control device and a transparent display device including the light control 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 can be realized as an organic light emitting display device. In this case, the power consumption is small. However, the contrast ratio is not problematic in a dark environment, but the contrast ratio is lowered in a light environment. 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. Therefore, there is a need for a light control device capable of realizing a light-shielding mode for intercepting light and a transmissive mode for transmitting light in order to prevent a bright room contrast ratio from lowering when the transparent display device is implemented as an organic light emitting display device.

The light control device may include a first base film, a second base film, a liquid crystal layer disposed between the first base film and the second base film, and barrier ribs for keeping the gap of the liquid crystal layer constant . One side of the light control device is provided with a control driving section for controlling the transmission mode and the light shielding mode of the light control device. The control driver includes a control flexible film and a control circuit board. The control flexible film is attached to each side of the first base film and the second base film, and the control circuit board is connected to the control flexible film. The control driver is disposed on one side of the light control device, extending from the side of the light control device, to reduce the bezel area of the transparent display device. In this case, the flexible second base film can be bent in one lateral direction of the light control device along the control driving portion. As a result, the second electrode provided on the second base film and the first electrode provided on the first base film may be short-circuited. When the first electrode and the second electrode are short-circuited, normal operation of the light control device is difficult.

The present invention relates to a light control device capable of preventing the first electrode and the second electrode from being shorted when the second base film is bent in one lateral direction of the light control device, Device.

A light control device according to an embodiment of the present invention includes a first base film having a first projection, a second base film having a second projection, and a liquid crystal layer disposed between the first and second base films , The first projecting portion is not covered by the second base film, and the second projecting portion is not covered by the first base film.

A transparent display device according to an embodiment of the present invention includes a transparent display panel that transmits light and displays an image, and a light control device disposed on at least one side of the transparent display panel. Wherein the light control device comprises a first base film having a first projection, a second base film having a second projection, and a liquid crystal layer disposed between the first and second base films, The second base film does not cover the second projection, and the second projection is not covered by the first base film.

According to an aspect of the present invention, there is provided a method of manufacturing a transparent display device in which a first protrusion and a second flexible circuit board are bonded to a lower surface of a lower plate, It is possible to prevent the first base film and the second base film from contacting each other when bending in one side direction. Thus, it is possible to prevent the first electrode on the first base film and the second electrode on the second base film from being short-circuited, and the light control device can be driven normally.

In addition, since the transparent display device according to the embodiment of the present invention is provided with the spacers between the first base film and the second base film, when the second projection and the second flexible circuit board are bent in one side direction of the lower plate The first base film and the second base film can be prevented from contacting each other. As a result, the first electrode on the first base film facing each other and the second electrode on the second base film can be prevented from being shorted, and the light control device can be driven normally.

In addition to the effects of the present invention mentioned above, other features and advantages of the present invention will be described below, or may be apparent to those skilled in the art from the description and the description.

1 is a perspective view showing a transparent display device according to an 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 a pixel of the display area of FIG. 2;
4 is a cross-sectional view taken along the line I-I 'in Fig. 3;
5 is a plan view showing a light control device according to an embodiment of the present invention;
6 is a cross-sectional view showing one side section of a light control device according to an embodiment of the present invention;
7 is a cross-sectional view showing a cross section of region A in Fig. 5;
8 and 9 are sectional views showing one side section of a transparent display device according to the first embodiment of the present invention.
10 is a cross-sectional view showing one side section of a transparent display device according to a second embodiment of the present invention.
11 is a cross-sectional view showing one side section of a transparent display device according to a third embodiment of the present invention.

The meaning of the terms described herein should be understood as follows.

The word " first, "" second," and the like, used to distinguish one element from another, are to be understood to include plural representations unless the context clearly dictates otherwise. The scope of the right should not be limited by these terms. It should be understood that the terms "comprises" or "having" does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof. 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 that the first item, the second item or the third item, as well as the first item, the second item, Means any combination of items that can be presented from more than one. The term "on" means not only when a configuration is formed directly on top of another configuration, but also when a third configuration is interposed between these configurations.

Hereinafter, preferred embodiments of a light control device, a transparent display device including the light control device, and a manufacturing method thereof according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a perspective view showing a transparent display device according to an 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;

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 controller 160, a light control device 200, and an adhesive layer 300.

Although the transparent display device according to the embodiment of the present invention has been described as being implemented with an organic light emitting display, it may be implemented as a liquid crystal display (LCD) or an electrophoresis display .

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

Gate lines and data lines are formed in the display area DA of the transparent display panel 100, and light emitting parts may be formed in the intersecting areas of the gate lines and the data lines. The light emitting portions 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 W is provided between the adjacent anode electrodes (AND), whereby 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 (W). When a voltage is applied to the anode electrode (AND) and the cathode electrode (CAT), the 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. In the top emission type, since the light of the organic layer EL emits in the direction of the upper substrate, the transistor T may be provided broadly below the bank W 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, each of the pixels P 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 by a GIP method on both sides of the display area DA of the transparent display panel 100, or may be formed by a driving chip, mounted on a flexible film, Or may be attached to the transparent display panel 100 in a similar manner.

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 first substrate 111 is larger than that of the second substrate 112, a part of the first substrate 111 can be exposed without being covered by the second substrate 112. Display pads are provided on a part of the first substrate 111 exposed by the second substrate 112 without being covered. 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 controller 60 generates a gate control signal for controlling the operation timing of the gate driver 120 and a source control signal for controlling the source driver ICs 130 based on the timing signal. The timing controller 60 supplies a gate control signal to the gate driver 120 and a source control signal to the source driver ICs 30. [

The light control device 200 can block the light incident in the light shield mode and transmit the light incident in the light transmission mode. In the exemplary embodiment of the present invention, the light control device 200 has implemented a light blocking mode and a transmissive mode by using a liquid crystal layer having a dynamic scattering mode. However, the present invention is not limited thereto, and a PDLC layer a light-shielding mode and a transmissive mode may be implemented using a polymer network liquid crystal layer (PNLC). A detailed description of the light control device 200 according to the embodiment of the present invention will be given later with reference to FIGS. 5 to 7. FIG.

The adhesive layer (300) bonds the transparent display panel (100) and the light control device (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). In this case, the adhesive layer 300 may have a refractive index of 1.4 to 1.9 for refractive index matching between the transparent display panel 100 and the light control device 200.

The lower plate 400 is disposed on one side of the light control device 200. The lower plate 400 protects the light control device 200. For example, the lower plate 400 may be a transparent tempered glass substrate or a transparent plastic substrate, but is not limited thereto.

5 is a plan view showing a light control device according to an embodiment of the present invention. 6 is a cross-sectional view showing one side section of a light control device according to an embodiment of the present invention. 7 is a cross-sectional view showing a cross section of region A in Fig. Hereinafter, a light control device according to an embodiment of the present invention will be described in detail with reference to FIGS. 5 to 7. FIG.

5 to 7, a light control device 200 according to an embodiment of the present invention includes a light control area LCA and an adhesive member SL. The light control area LCA is provided at a position corresponding to the display area DA in Fig. The adhesive member SL is provided between the first and second base films 210 and 220. The adhesive member SL serves to bond the first and second base films 210 and 220. The adhesive member SL is disposed at the rim of the first and second base films 210 and 220.

The light control device 200 includes a first base film 210, a second base film 220, a first electrode 230, a second electrode 240, a liquid crystal layer 250, a first flexible circuit board 260, a second flexible circuit board 270, and a voltage supply unit 280.

The first base film 210 is disposed to face the second base film 220. A first protrusion 211 is formed on one side of the first base film 210. The first protrusion 211 protrudes from the second base film 220 facing the first base film 210. The first protrusion 211 is not covered by the second base film 220. First pads 213 connected to the first electrode 230 are formed on the upper surface of the first protrusion 211. The first pads 213 are electrically connected to the first flexible circuit board 260 and transfer the driving voltage applied from the voltage supply unit 280 to the first electrode 230. The first pads 213 may be formed simultaneously using the same process as that of the first electrode 230, or they may be the same material.

The second base film 220 is disposed to face the first base film 210. A second protrusion 221 is provided on one side of the second base film 220. The second protrusion 221 protrudes from the first base film 210 facing the second base film 220. The second protrusion 221 is not covered by the first base film 210. Below the second protrusion 221, second pads 223 connected to the second electrode 240 are provided. The second pads 223 are electrically connected to the second flexible circuit board 270 and transfer a common voltage applied from the voltage supply unit 280 to the second electrode 240. The second pads 223 may be formed at the same time using the same process as the second electrode 240, or may be the same material.

The first base film 210 and the second base film 220 may be plastic films. For example, the first base film 210 and the second base film 220 may be formed of a cellulose resin such as TAC (triacetyl cellulose) or DAC (diacetyl cellulose), a cycloolefin (COP) such as Norbornene derivatives, polyolefin such as poly (polycarbonate), PE (polyethylene) or PP (polypropylene), PVA (polyvinyl alcohol), PES polyether sulfone, polyether sulfone, polyetheretherketone (PEEK), polyetherimide (PEI), polyethylenenaphthalate (PEN), and polyethyleneterephthalate (PET); polyimide; polysulfone; or fluoride resin But is not limited thereto.

The first electrode 230 is provided on one surface of the first base film 210 facing the second base film 220. The second electrode 240 is provided on one surface of the second base film 220 facing the first base film 210. The first electrode 230 is connected to the first pads 213 and the second electrode 240 is connected to the second pads 223. For example, the first and second electrodes 230 and 240 may be formed of an oxide such as AgO or Ag2O or Ag2O3, an aluminum oxide such as Al2O3, a tungsten oxide such as WO2 or WO3 or W2O3, (Eg, MgO), molybdenum oxide (eg MoO3), zinc oxide (eg ZnO), tin oxide (eg SnO2), indium oxide (eg In2O3), chromium oxide (eg CrO3 or Cr2O3) (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, ), Iron oxide (eg Fe2O3 or Fe3O4), niobium oxide (eg Nb2O5), indium tin oxide (eg Indium Tin Oxide), indium zinc oxide (eg Indium Zinc Oxide, IZO) (Eg, Aluminum Tin Oxide (TAO)) or antimony tin oxide (eg, Antimony Tin Oxide (ATO)), aluminum oxide It is, but is not limited to this.

The liquid crystal layer 250 is provided between the first base film 210 and the second base film 220. The liquid crystal layer 250 is provided between the first electrode 230 and the second electrode 240. The liquid crystal layer 250 may be a dynamic scattering mode liquid cyrstal layer comprising liquid crystals, dichroic dyes, and ionic materials. In the dynamic scattering mode, when voltages are applied to the first and second electrodes 230 and 240, liquid crystals and dichroic dyes are randomly moved by ionic materials. In this case, since the light incident on the liquid crystal layer 250 can be scattered by the liquid crystals moving randomly or absorbed by the dichroic dyes, a light shielding mode can be realized. Alternatively, the liquid crystal layer 250 may be a guest host liquid crystal layer comprising liquid crystals and dichroic dyes. In this case, the liquid crystals may be a host material and the dichroic dyes may be a guest material. Alternatively, the liquid crystal layer 250 may be a polymer network liquid crystal layer comprising liquid crystals, dichroic dyes, and a polymer network. In this case, the liquid crystal layer 250 can increase the scattering effect of light incident due to the polymer network. When a polymer network is included, the light shielding ratio can be increased as compared with the case where the polymer network is not shielded. In FIG. 6, for convenience of explanation, it is illustrated that the liquid crystal layer 250 is implemented as a dynamic scattering mode liquid crystal layer.

Specifically, the liquid crystal layer 250 may include liquid crystal cells 251, barrier ribs 252, a first orientation film 253, and a second orientation film 254. The liquid crystal cells 251 are provided between the first electrode 230 and the second electrode 240. The liquid crystal cells 251 include liquid crystals 251a, dichroic dyes 251b, and ionic materials 251c. The long axis direction of the liquid crystal 251a is arranged in the vertical direction (Z-axis direction) by the first and second alignment films 253 and 254 even if no voltage is applied to the first and second electrodes 230 and 240 May be positive liquid crystals, but are not necessarily limited thereto. Even if a voltage is not applied to the first and second electrodes 230 and 240 as in the case of the liquid crystal 251a, the long axis direction of the dichroic dyes 251b may be perpendicularly oriented by the first and second alignment films 253 and 254, (Z-axis direction). Accordingly, the light control device 200 can operate in the transmission mode even when no voltage is applied, so that the transmission mode can be realized without power consumption.

The dichroic dyes 251b may be dyes that absorb light. For example, the dichroic dye 251b absorbs light other than a black dye or a specific color (for example, red) that absorbs all of light in a visible light wavelength band, and absorbs light of a specific color ) ≪ / RTI > In the embodiment of the present invention, the dichroic dyes 251b are black dyes. However, the present invention is not limited thereto. For example, the dichroic dyes 251b may be dyes having a color of any one of red, green, blue, and yellow, or a mixture thereof. have. In other words, the embodiment of the present invention can shield the back background while expressing various colors in the light shielding mode. Accordingly, the embodiment of the present invention can provide various colors in the light shielding mode, so that the user can feel aesthetic sense. For example, the transparent display device according to an embodiment of the present invention can be used in a public place, and when applied to a smart window or a public window requiring a transmission mode and a light-shielding mode, So that the light can be shielded.

The ionic material 251c serves to allow liquid crystals and dichroic dyes to move randomly. The ionic material 251c may have a predetermined polarity so that the first electrode 230 or the second electrode 240 may be formed in accordance with the polarity of the voltage applied to the first electrode 230 and the second electrode 240. [ . ≪ / RTI > For example, when the ionic material 251c has a negative polarity, when a positive voltage is applied to the first electrode 230 and a negative voltage is applied to the second electrode 240, 1 electrode (230). When the ionic material 251c has a negative polarity, when a positive voltage is applied to the second electrode 240 and a negative voltage is applied to the first electrode 230, (240). When the ionic material 251c has a positive polarity and a positive voltage is applied to the first electrode 230 and a negative voltage is applied to the second electrode 240, And moves to the electrode 240. When the ionic material 251c has a positive polarity and a positive voltage is applied to the second electrode 240 and a negative voltage is applied to the first electrode 230, (230). Therefore, when a voltage is applied to the first and second electrodes 230 and 240, the ion material 251c travels from the first electrode 230 to the second electrode 240 at a predetermined period, 230). ≪ / RTI > In this case, the liquid crystal 251a and the dichroic dyes 251b can be moved randomly because the ionic materials 251c move to hit the liquid crystals 251a and the dichroic dyes 251b. The voltage applied to the first and second electrodes 230 and 240 may be an alternating voltage. Alternatively, since the ionic materials 251c move or distort the vertical electric field while moving, the liquid crystals 251a and the dichroic dyes 251b can move randomly due to the change or distortion of the vertical electric field.

Alternatively, the ion materials 251c may exchange electrons with each other according to the polarity of the voltage applied to the first electrode 230 and the second electrode 240. [ Therefore, when an AC voltage having a predetermined period is applied to the first and second electrodes 230 and 240, the ion material 251c exchanges electrons with a predetermined period. In this case, the electrons move to hit the liquid crystal 251a and the dichroic dyes 251b, so that the liquid crystals 251a and the dichroic dyes 251b move randomly. The voltage applied to the first and second electrodes 230 and 240 may be an alternating voltage. Alternatively, since the electrons change or distort the vertical electric field as they move, the liquid crystals 251a and the dichroic dyes 251b can move randomly due to the change or distortion of the vertical electric field.

Since the liquid crystal cell 251 is in a liquid state, partition walls 252 for maintaining the cell gap of the liquid crystal cell 251 are required. The barrier ribs 252 may be disposed on one side of the first electrode 230 facing the second base film 220. The barrier ribs 252 may be spaced apart at predetermined intervals, and the liquid crystal cell 251 may be partitioned by the barrier ribs 252.

The barrier ribs 252 are for maintaining a cell gap of the liquid crystal layer 250. Since the barrier ribs 252 are formed, when the external force is applied, the inside of the liquid crystal layer 250 can be protected. The barrier ribs 252 may be formed of a transparent material. In this case, the barrier ribs 252 may be formed of any one of photo resist, photo-curable polymer, and polydimethylsiloxane, but are not limited thereto.

Alternatively, the barrier ribs 252 may include a material capable of absorbing light. For example, each of the partitions 252 may be implemented as a black partition. In the embodiment of the present invention, the barrier ribs 252 are provided corresponding to the emission region EA of the transparent display panel 100, so that even if each of the barrier ribs 252 is implemented as a black barrier rib, the transmissivity is hardly lost in the transmissive mode .

Alternatively, the barrier ribs 252 may include scattering particles capable of scattering light. The scattering particles can be beads or silica balls. In this case, the partition walls 252 can scatter light scattered by the first and second liquid crystals 251a and 521d in the light shielding mode, thereby making the optical path longer. When the light path is long, the probability of light being absorbed by the dichroic dyes 251b is increased, so that the light shielding ratio of the light shielding mode can be increased.

On the other hand, the barrier ribs 252 actively pass light or can not block light as the liquid crystal cells 251. That is, when the barrier ribs 252 are formed of a transparent material, they only pass light and do not function to block light. In addition, when the barrier ribs 252 include a material that absorbs light or a material that scatters light, it only scatters or blocks light, and does not pass light. Therefore, when the barrier ribs 252 are formed in the region corresponding to the transmissive area TA of the transparent display device, light leakage occurs in the barrier ribs 252 in the light shielding mode and the light transmittance is increased, There is a problem in that the light transmittance is lowered by intercepting the light. Accordingly, the barrier ribs 252 are disposed corresponding to the light emitting areas EA of the transparent display panel 100, and the liquid crystal cells 251 are disposed corresponding to the transmissive areas TA of the transparent display panel 100 . The barrier ribs 252 may be arranged in a stripe form, but are not limited thereto. The barrier ribs 252 may be arranged in a cylindrical shape, a honeycomb shape, or p (p is a positive integer of 3 or more).

The first alignment layer 253 is provided on one surface of the first electrode 230 facing the second base film 220 and on the barrier ribs 252. The second alignment layer 254 is provided on one surface of the second electrode 240 facing the first base film 210. The first and second alignment layers 253 and 254 are formed so that the longitudinal axes of the liquid crystals 251a and the dichroic dyes 251b are aligned in the vertical direction (Z-axis direction). For example, the first and second alignment films 253 and 254 may be polyimide (PI).

The first flexible circuit board 260 is attached on the first pads 213. The first flexible circuit board 260 includes a first circuit film 261, a second circuit film 263, driving voltage wires 265, and connection wires 267. On the lower surface of the first circuit film 261, driving voltage lines 265 and connecting lines 267 are provided. Each of the driving voltage wirings 265 is attached to the first pads 213 and applies a driving voltage applied from the voltage supplying unit 280 to the first electrode 230. The connection wirings 267 are provided on the lower surface of the first circuit film 261 so as not to overlap the driving voltage wirings 265. Each of the connection wirings 267 applies a common voltage applied from the voltage supply unit 280 to the second electrode 240. To this end, the first and second flexible circuit boards 260 and 270 may be electrically connected to each other. One side of the connection wirings 267 is electrically connected to the voltage supply unit 280 and the other side of the connection wirings 267 is electrically connected to common voltage wirings 277 provided on the second flexible circuit board 270 . Bonding members 290 may be provided between the connection wirings 267 and the common voltage wirings 277. The bonding member 290 is provided with a conductive ball 291 therein so that the connection wires 267 and the common voltage wires 277 can be electrically connected through the conductive ball 291.

A second circuit film 263 is provided under the driving voltage lines 265 and the connecting lines 267. [ The second circuit film 263 protects the driving voltage lines 265 and the connection lines 267. In this case, the other side of the connection wirings 267 not connected to the voltage supply unit 280 is exposed without being covered by the second circuit film 263. The other side of the exposed connection wirings 267 is electrically connected to the common voltage wirings 277.

The second flexible circuit board 270 is attached on the second pads 223. The second flexible circuit board 270 includes a third circuit film 271, a fourth circuit film 273, and common voltage lines 277. Common voltage lines 277 are provided on the upper surface of the third circuit film 271. Each of the common voltage wirings 277 applies a common voltage applied from the voltage supply unit 280 to the second electrode 240. To this end, one side of the common voltage lines 277 is electrically connected to the connection lines 267, and the other side of the common voltage lines 277 is electrically connected to the second pads 223. A fourth circuit film 273 is provided on the common voltage lines 277. The fourth circuit film 273 protects the common voltage lines 277.

The voltage supplier 280 supplies a driving voltage to the first electrode 230 and a common voltage to the second electrode 240. The voltage supply unit 280 may be connected to the first flexible circuit board 280. When a driving voltage is applied to the first electrode 230 and a common voltage is applied to the second electrode 240, the liquid crystals 251a and the dichroic dyes 251b of the liquid crystal layer 250 are separated from the ionic material 251c ). ≪ / RTI > In this case, since the light incident on the liquid crystal layer 250 can be scattered by the liquid crystal 251a moving at random or absorbed by the dichroic dyes 251b, the light control device 200 can realize a light shielding mode .

8 and 9 are cross-sectional views illustrating one side section of a transparent display device according to a first embodiment of the present invention. FIG. 8 is a cross-sectional view showing one side section of a transparent display device provided with a second projection, and FIG. 9 is a cross-sectional view showing one side section of a transparent display device provided with a first projection. This is related to the transparent display device according to the above-described FIG. 1 to FIG. 7, and the same reference numerals are assigned to the same components, and repetitive explanations of the repetitive portions in the materials and structures of the respective components are omitted.

Referring to FIG. 8, the first base film 210 is disposed to face the second base film 220, and the second protrusion 221 is provided on one side of the second base film 220. The lower plate 400 is disposed under the first base film 210 to protect the light control device 200. In this case, one side of the lower plate 400 facing the second protrusion 221 protrudes from the first base film 210.

According to an embodiment of the present invention, the second protrusion 221 and the second flexible circuit board 270 may be disposed on the side of the lower plate 400 in order to reduce the bezel area of the transparent display device. The second flexible circuit board 270 bonded to the second protrusions 221 and the second protrusions 221 can be bent in one lateral direction (-Z axis direction) of the lower plate 400. In this case, in the conventional transparent display device, since the first base film 210 protrudes from the lower plate 400, the second protrusion 221 and the second flexible circuit board 270 are formed to reduce the bezel area. The second base film 220 and the first base film 210 may be in contact with each other when bent in one lateral direction (-Z axis direction) of the lower plate 400. Accordingly, the second electrode 240 provided on the second base film 220 and the first electrode 230 provided on the first base film 210 may be short-circuited.

However, in the transparent display device according to the first embodiment of the present invention, since one side of the lower plate 400 facing the second projection 221 protrudes from the first base film 210, the second projection 221 And the second flexible circuit board 270 are bent in one lateral direction (-Z axis direction) of the lower plate 400, the first base film 210 and the second base film 220 are in contact with each other . Accordingly, the short circuit between the first electrode 230 and the second electrode 240 can be prevented, and the light control device 200 can be driven normally.

Referring to FIG. 9, a first protrusion 211 is formed on one side of the first base film 210. The first flexible circuit board 260 is bonded onto the first projection 211. Here, the lower plate 400 is disposed under the first base film 210. The first flexible circuit board 210 adhered to the first protrusion 211 and the second protrusion 211 is bent in one lateral direction (-Z-axis direction) of the lower plate 400 in order to reduce the bezel area of the transparent display device, . ≪ / RTI > Although the first protrusion 211 and the first flexible circuit board 210 according to the embodiment of the present invention are bent in one lateral direction (-Z axis direction) of the lower plate 400, the second base film 220, . Therefore, the light control device 200 is driven normally without being influenced by bending the first projecting portion 211 and the first flexible circuit board 210 in one lateral direction (-Z-axis direction) of the lower plate 400 .

10 is a cross-sectional view illustrating one side section of a transparent display device according to a second embodiment of the present invention. This is a cross-sectional view showing one side section of the transparent display device provided with the second projection. The transparent display device according to the second embodiment of the present invention is configured such that the first base film 210 protrudes from the lower plate 400 and the spacer 295 is provided between the first base film 210 and the second base film 220 ) Are provided in the transparent display device according to the first embodiment of the present invention. Therefore, in the following description, only the first base film 210, the spacer 295, and the structure related thereto will be described, and redundant description of the remaining structures will be omitted.

Referring to FIG. 10, the first base film 210 according to the second embodiment of the present invention may be provided on the same line as the lower plate 400, or may protrude from the lower plate 400. In this case, a spacer 295 may be additionally provided between the second projection 221 and the adhesive member SL. The spacer 295 is disposed between the first base film 210 and the second base film 220. The spacer 295 maintains a gap between the first base film 210 and the second base film 220. The spacers 295 may be disposed at the outermost portions of the barrier ribs 252. The spacer 295 may be spaced a certain distance from the partition 252 disposed at the outermost portion. The spacers 295 may be provided at the same time through the same process as the barrier ribs 252 and may be made of the same material. The spacer 295 may be in the form of a stripe, but is not limited thereto, and may have various shapes.

Since the spacer 295 is provided between the first base film 210 and the second base film 220 in the transparent display device according to the second embodiment of the present invention, The first base film 210 and the second base film 220 can be prevented from coming into contact with each other even if they are on the same line or protruded as the first base film 210 and the second base film 220. [ Accordingly, the short circuit between the first electrode 230 and the second electrode 240 can be prevented, and the light control device 200 can be driven normally.

11 is a cross-sectional view showing one side section of a transparent display device according to a third embodiment of the present invention. This is because a spacer 295 is added between the first base film 210 and the second base film 220 in the transparent display device according to the first embodiment of the present invention. Therefore, in the following description, only the spacer 295 and the structure related thereto will be described, and redundant description of the remaining structures will be omitted.

Referring to FIG. 11, a spacer 295 is provided between the first base film 210 and the second base film 220 according to the third embodiment of the present invention. The spacer 295 may be disposed between the second projection 221 and the adhesive member SL. The spacer 295 maintains a gap between the first base film 210 and the second base film 220. The spacers 295 may be provided at the same time through the same process as the barrier ribs 252 and may be formed of the same material. In addition, the spacer 295 may have a cylindrical shape or a stripe shape, but is not limited thereto, and may have various shapes.

The transparent display device according to the third embodiment of the present invention provides the same effect as the transparent display device according to the first embodiment of the present invention. In addition, since the spacer 295 is additionally provided between the first base film 210 and the second base film 220, the second protrusion 221 and the second flexible circuit board 270 can be attached to the lower plate 400 The first base film 210 and the second base film 220 can be further prevented from being brought into contact with each other. Accordingly, a short circuit between the first electrode 230 and the second electrode 240 can be further prevented, and the light control device can be driven normally.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. Will be clear to those who have knowledge of. Therefore, the scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their 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 unit 200: light control device
210: first base film 211: first protrusion
220: second base film 221: second protrusion
230: first electrodes 240: second electrode
250: liquid crystal layer 251: liquid crystal cell
253: first orientation film 254: second orientation film
252: partition wall 260: first flexible circuit board
270: second flexible circuit board 300: adhesive layer
400: Lower plate

Claims (10)

A first base film having a first projection;
A second base film having a second projection; And
And a liquid crystal layer disposed between the first and second base films,
Wherein the first projecting portion is not covered by the second base film, and the second projecting portion is not covered by the first base film. The method according to claim 1,
First pads provided on the first protrusion of the first base film; And
And second pads provided below the second protrusion of the second base film. 3. The method of claim 2,
A first flexible circuit board attached to the first pads; And
And a second flexible circuit board attached to the second pads. The method of claim 3,
Wherein the first flexible circuit board and the second flexible circuit board are electrically connected to each other. 5. The method of claim 4,
And a voltage supply unit provided at one side of the first flexible circuit board for supplying a driving voltage to the first pads and supplying a common voltage to the second pads. The method of claim 3,
Further comprising a lower plate disposed below the first base film,
Wherein the second protrusion and the second flexible circuit board are bent in one lateral direction of the lower plate. The method according to claim 6,
And one side of the lower plate facing the second projection protrudes from the first base film. The method according to claim 6,
Further comprising an adhesive member adhering the first and second base films and provided at edges of the first base film and the second base film,
And a spacer provided between the first and second protrusions and the adhesive member, for maintaining a gap of the first and second base films. 9. The method of claim 8,
A first electrode provided on the first base film and connected to the first pads; And
And a second electrode provided below the second base film and connected to the second pads. A transparent display panel that transmits light and displays an image; And
And a light control device disposed on at least one side of the transparent display panel,
The light control device comprises the light control device according to any one of claims 3 to 8.

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