KR102460978B1 - Light controlling apparatus, and transparent display device using the same - Google Patents

Abstract

The present invention provides a light control device capable of preventing image quality from being deteriorated and a transparent display device including the same. a first electrode disposed on the first electrode, a liquid crystal cell disposed on the first electrode, and a liquid crystal cell disposed in a liquid crystal region, and a partition wall disposed on one side of the normal cell and disposed in the partition wall region, wherein one partition wall region includes a plurality of partition walls are placed

Description

LIGHT CONTROLLING APPARATUS, AND TRANSPARENT DISPLAY DEVICE USING THE SAME

The present invention relates to a light control device and a transparent display device including the same.

Recently, as the information age enters, the field of display for processing and displaying a large amount of information has been rapidly developed, and various display devices have been developed and spotlighted in response to this.

Specific examples of such a display device include a liquid crystal display device (LCD), a plasma display panel device (PDP), a field emission display device (FED), an electroluminescence display device ( Electroluminescence Display device (ELD), Organic Light Emitting Diodes device (OLED), etc. are mentioned. This display device exhibits excellent performance of thinness, light weight, and low power consumption, so that the application fields of the display device are continuously increasing. In particular, in most electronic devices or mobile devices, a display device is used as one of the user interfaces.

Also, recently, research on a transparent display device that allows a user to see an object or image located on the opposite side through the display device has been actively conducted due to its characteristics.

The transparent display device has advantages of space utilization, interior design, and design, and may have various application fields. The transparent display device can solve the spatial and visual constraints of existing electronic devices by implementing the functions of information recognition, information processing, and information display as a transparent electronic device. Such a transparent display device may be used for a smart window, and the smart window may be applied as a window for a smart home or a smart car.

Among them, a transparent display implemented as an organic light emitting diode display has an advantage of low power consumption, but has a disadvantage in that a contrast ratio is lowered in a light environment. The contrast ratio of a dark environment may be defined as a darkroom contrast ratio, and a contrast ratio of an environment with light may be defined as the brightroom contrast ratio. That is, since the transparent display device has a transmissive area in order to be able to see an object or a background located on the rear surface, there is a problem in that the contrast ratio of the bright room is lowered. Therefore, when the transparent display device is implemented as an organic light emitting display device, a light control device capable of implementing a light blocking mode for blocking light and a transmission mode for transmitting light to prevent a decrease in the bright-room contrast ratio is required.

The light control device may include a liquid crystal layer disposed between the first base film and the second base film, and a barrier rib for constantly maintaining a cell gap of the liquid crystal layer.

The liquid crystal included in the liquid crystal layer expands in volume at a high temperature. When the volume of the liquid crystal expands, the cell gap may become unbalanced due to an increase in pressure inside the first and second base films. When the cell gap becomes unbalanced, a gap is generated between the barrier rib that partitions the liquid crystal and the base film, and the liquid crystals may leave the liquid crystal layer. In particular, in a vertically mounted display device, liquid crystals separated by gravity are directed downward, which may cause a problem in transmittance at the lower end of the display device and deteriorate image quality of the display device.

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a light control device capable of preventing image quality from being deteriorated and a transparent display device including the same.

The present invention for achieving the above technical problem is a first base film including a liquid crystal region and a barrier rib region that are repeatedly provided, a first electrode disposed on the first base film, a first electrode disposed on the first electrode, and a liquid crystal region Provided are a light control device including a liquid crystal cell disposed in a liquid crystal cell, and a barrier rib disposed at one side of the liquid crystal cell, the barrier rib disposed in the barrier rib region, and a plurality of barrier ribs disposed in one barrier rib region, and a transparent display device including the same.

The light control device according to an embodiment of the present invention can prevent a gap between the barrier rib and the second base film from being generated by increasing the contact area of the adhesive layer by disposing a plurality of barrier ribs in one barrier rib region.

The light control device according to an embodiment of the present invention maintains a cell gap between the first base film and the second base film constant even if the liquid crystal contained in the liquid crystal cell expands at a high temperature and the internal pressure rises, thereby reducing reliability. it can be prevented

The light control device according to an embodiment of the present invention can prevent image quality from being deteriorated because the liquid crystal is not separated by the partition wall even when vertically mounted.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. .

1 is a perspective view of a light control device according to an embodiment of the present invention.
2 is a cross-sectional view of a light control device according to a first embodiment of the present invention.
3 is a cross-sectional view of a light control device according to a second embodiment of the present invention.
4A and 4B are diagrams of a light control device according to a third embodiment of the present invention.
5A and 5B are diagrams of a light control device according to a fourth embodiment of the present invention.
6A and 6B are diagrams of a light control device according to a fifth embodiment of the present invention.
7 is a perspective view of a transparent display device according to an embodiment of the present invention.
8 is a cross-sectional view of a transparent display panel according to an exemplary embodiment of the present invention.
9 is a cross-sectional view of a transparent display device according to an embodiment of the present invention.

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

The singular expression is to be understood as including the plural expression unless the context clearly defines otherwise, and the terms "first", "second", etc. are used to distinguish one element from another, The scope of rights should not be limited by these terms. It should be understood that terms such as “comprise” or “have” do not preclude the possibility of addition or existence of one or more other features or numbers, steps, operations, components, parts, or combinations thereof. The term “at least one” should be understood to include all possible combinations from one or more related items. For example, the meaning of "at least one of the first, second, and third items" means 2 of the first, second, and third items as well as each of the first, second, or third items. It means a combination of all items that can be presented from more than one. The term “on” is meant to include not only cases in which a certain component is formed directly on top of another component, but also a case in which a third component is interposed between these components.

Hereinafter, a preferred example of a light control device according to the present invention and a transparent display device including the same will be described in detail with reference to the accompanying drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are indicated in different drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

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

1 is a perspective view of a light control device according to an embodiment of the present invention. 2 is a cross-sectional view of a light control device according to a first embodiment of the present invention.

1 and 2 , in the light control device 100 according to the first embodiment of the present invention, a first base film 110 , a first electrode 120 , a liquid crystal layer 130 , and a second electrode 140 , and a second base film 150 .

The first base film 110 and the second base film 150 include a liquid crystal region LCA and a barrier rib region PA that are repeatedly provided. The first base film 110 and the second base film 150 may be plastic films. For example, the first base film 110 and the second base film 150 are cellulose resins such as triacetyl cellulose (TAC) or diacetyl cellulose (DAC), and cyclo olefin (COP) such as norbornene derivatives. acrylic resin such as polymer), COC (cyclo olefin copolymer), PMMA (poly(methylmethacrylate), etc., polyolefin such as PC (polycarbonate), PE (polyethylene) or PP (polypropylene), PVA (polyvinyl alcohol), PES ( Polyester such as poly ether sulfone), PEEK (polyetheretherketone), PEI (polyetherimide), PEN (polyethylenenaphthalate), PET (polyethyleneterephthalate), PI (polyimide), PSF (polysulfone), or fluoride resin, etc. It may be a sheet or film comprising a, but is not limited thereto.

The first electrode 120 is disposed on the first base film 110 , and the second electrode 140 is disposed on the second base film 150 . The first electrode 120 and the second electrode 140 may be transparent electrodes. For example, the first and second electrodes 120 and 140 may be formed of silver oxide (eg AgO or Ag2O or Ag2O3), aluminum oxide (eg Al2O3), tungsten oxide (eg WO2 or WO3 or W2O3), magnesium oxide (eg 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 (eg Sb2O3 or Sb2O5), titanium oxide (eg TiO2), nickel oxide (eg NiO), copper oxide (eg CuO or Cu2O), vanadium oxide (eg V2O3 or V2O5), cobalt oxide (eg CoO) ), iron oxide (e.g. Fe2O3 or Fe3O4), niobium oxide (e.g. Nb2O5), indium tin oxide (e.g. Indium Tin Oxide, ITO), indium zinc oxide (e.g. Indium Zinc Oxide, IZO), aluminum doped zinc oxide (eg, Aluminum doped Zinc Oxide, ZAO), aluminum doped tin oxide (eg, Aluminum Tin Oxide, TAO), or antimony tin oxide (eg, Antimony Tin Oxide, ATO), but is not limited thereto.

The liquid crystal layer 130 is disposed on the first electrode 120 . The liquid crystal layer 130 may be a guest host liquid crystal layer including liquid crystals and dichroic dyes. In this case, the liquid crystal may be a host material, and the dichroic dye may be a guest material. The liquid crystal layer 130 according to an embodiment of the present invention includes a liquid crystal cell (LCC), a barrier rib layer 133 , a first alignment layer 134 , a second alignment layer 135 , and an adhesive layer 136 .

The liquid crystal cell LCC is disposed in the liquid crystal region LCA of the first base film 110 . In addition, the liquid crystal cell LCC may be disposed on the first electrode 120 , the barrier rib connection layer 133a , and the first alignment layer 134 . The liquid crystal cell (LCC) according to an embodiment of the present invention may include liquid crystals 131 and dichroic dyes 132 capable of implementing a black state of a light blocking mode by light absorption. . The liquid crystal 131 and the dichroic dye 132 are plural in the liquid crystal cell (LCC), and may be a nematic liquid crystal whose arrangement is changed by a vertical (y-axis direction) electric field. not limited

The dichroic dye 132 may be a dye that absorbs light. For example, the dichroic dye 132 is a black dye that absorbs all light of a visible light wavelength band or a specific color (eg, red) absorbs light other than a wavelength band of a specific color (eg, red). ) may be a dye that reflects light in the wavelength band. The dichroic dye 132 according to an embodiment of the present invention is preferably a black dye in order to increase a light blocking rate for blocking light, but is not limited thereto. For example, the dichroic dye 132 may be a dye having a color of any one of red, green, blue, and yellow or a mixture thereof. have. When the dichroic dye 132 is a dye having a red-based color, light passing through the liquid crystal cell LCC becomes a red-based color. Accordingly, when no voltage is applied, the light control device 100 may display the color of the dichroic dye 132 positioned in the liquid crystal cell LCC while light passes through the liquid crystal cell LCC. Accordingly, when the light control apparatus 100 according to the first embodiment of the present invention is implemented in the light blocking mode, it is possible to block the back background while expressing various colors instead of black-based colors. Since the light control apparatus 100 according to the first embodiment of the present invention can provide various colors in the liquid crystal region LCA when blocking light, it can provide an aesthetic effect to the user. For example, when the light control device 100 is applied to a smart window or a public window that can be used in a public place and requires a transparent mode and a light blocking mode, light can be blocked while expressing various colors according to time or place.

The dichroic dye 132 may be a material including aluminum zinc oxide (eg, Aluminum Zinc Oxide, AZO), but is not limited thereto.

In the light control apparatus 100 , when the amount of the dichroic dye 132 is increased to increase the light blocking rate in the light blocking mode, the transmittance may be decreased. Accordingly, the amount of the dichroic dye 132 may be set in consideration of the light blocking rate of the light blocking mode and the transmittance of the transparent mode.

The barrier layer 133 is disposed on the first electrode 120 . The barrier rib layer 133 according to an embodiment of the present invention includes a plurality of barrier ribs in the form of concavo-convex shapes. The plurality of barrier ribs are disposed in the barrier rib area PA of the first base film 110 . The barrier rib layer 133 according to the first embodiment of the present invention includes a barrier rib connecting layer 133a and a plurality of barrier ribs including the first barrier rib 133b and the second barrier rib 133c.

The barrier rib connecting layer 133a is disposed on the entire region of the first electrode 120 to connect the plurality of first barrier ribs 133b and the second barrier rib 133c.

The first partition wall 133b and the second partition wall 133c are spaced apart from each other and disposed in one partition wall area PA. The first partition wall 133b is disposed adjacent to one side of the first liquid crystal cell LCC1 disposed in the first liquid crystal area LCA1 , and the second partition wall 133c is disposed in the second liquid crystal area LCA2 disposed in the second liquid crystal area LCA2 . 2 It is disposed adjacent to one side of the liquid crystal cell (LCC2). More specifically, the first partition wall 133b is surrounded by a first alignment layer 134 , wherein the first alignment layer 134 surrounding the first partition wall 133b is formed on one side of the first liquid crystal cell LCC1 and placed in contact with In addition, the second partition wall 133c is surrounded by the first alignment layer 134 , and in this case, the first alignment layer 134 surrounding the second partition wall 133c is disposed to contact one side of the second liquid crystal cell LCC2 . do.

Such a structure is repeated for each liquid crystal area LCA and the barrier rib area PA, so that one liquid crystal cell LCC2 has a first barrier rib 133b and a second barrier rib provided in different barrier rib areas PA1 and PA2. (133c) can be demarcated. The first partition wall 133b and the second partition wall 133c separate the liquid crystal 131 and the dichroic dye 132 provided in different liquid crystal cells LCC, and thus the liquid crystal (LCC) provided for each liquid crystal cell LCC. 131) and the dichroic dye 132 are maintained so that the light control device 100 can evenly implement the light blocking mode.

In addition, the first partition wall 133b and the second partition wall 133c maintain a cell gap between the first base film 110 and the second base film 150 . The light control device 100 according to the first embodiment of the present invention provides an adhesive layer (described later) by disposing the first partition wall 133b and the second partition wall 133c spaced apart from each other in one partition wall area PA. 136 may be provided in a space between the first partition wall 133b and the second partition wall 133c. Since the adhesive force of the adhesive layer 136 increases as the contact area increases, the adhesive layer 136 forms a space between the first and second partition walls 133b and 133c, and the first and second partitions 133b and 133c. By contacting the upper part of (133c), the adhesive force can be increased. That is, in the light control apparatus 100 according to the first embodiment of the present invention, the contact area of the adhesive layer 136 is increased by disposing the first partition wall 133b and the second partition wall 133c in one partition wall area PA. By increasing, it is possible to prevent a gap from being generated between the partition wall and the second base film 150 . Accordingly, in the light control device 100 according to the first embodiment of the present invention, even if the liquid crystal 131 included in the liquid crystal cell LCC expands at a high temperature to increase the internal pressure, the first base film 110 and the second By maintaining a constant cell gap between the two base films 150 , it is possible to prevent deterioration of reliability. In addition, the light control apparatus 100 according to the first embodiment of the present invention can prevent image quality from being deteriorated because the liquid crystal 131 is partitioned by the barrier rib and does not separate even when vertically mounted.

The barrier layer 133 may be any one of a transparent photoresist, a photocurable polymer, and polydimethylsiloxane, but is not limited thereto.

The first alignment layer 134 is disposed on the barrier rib layer 133 and disposed on the entire surface of the first base film 110 . The first alignment layer 134 is disposed to surround side surfaces and top surfaces of the first and second partition walls 133b and 133c. At the same time, the first alignment layer 134 may be disposed to surround the side surface and the lower surface of the liquid crystal cell LCC. The first alignment layer 134 surrounding the side surfaces and upper surfaces of the first and second partition walls 133b and 133c is disposed in the partition wall area PA.

The second alignment layer 135 may be disposed on the liquid crystal cell LCC and may be disposed in the liquid crystal region LCA of the first base film 110 . The lower surface of the second alignment layer 135 is in contact with the liquid crystal cell (LCC) and the upper surface is in contact with the second electrode 140 . In addition, an adhesive layer 136 is disposed on one side and the other side of the second alignment layer 135 according to an embodiment of the present invention. Since the second alignment layer 135 according to an embodiment of the present invention is disposed separately for each liquid crystal region LCA like the liquid crystal cell LCC, it is in contact with the adhesive layer 136 at a portion in contact with the barrier rib region PA. The adhesive layer 136 may contact the upper portions of the first partition wall 133b and the second partition wall 133c and at the same time also contact the side surface of the second alignment layer 135 to increase the contact area, thereby increasing the adhesive force. In addition, since the adhesive layer 136 is disposed on one side and the other side of the second alignment layer 135 and the adhesive layer 136 is in contact with the second electrode 140 , the second alignment layer 135 and There is no need to dispose a separate adhesive layer between the second electrodes 140 .

The liquid crystal 131 and the dichroic dye 132 may be arranged in a predetermined direction by the first alignment layer 134 and the second alignment layer 135 . For example, the liquid crystal 131 and the dichroic dye 132 may be arranged in a vertical direction (y-axis direction) in the long axis direction. The first alignment layer 134 and the second alignment layer 135 according to an example may be made of polyimide (PI).

The adhesive layer 136 is disposed on the first alignment layer 134 and may be disposed in the partition wall area PA. The adhesive layer 136 is provided between the plurality of barrier ribs except for the liquid crystal area PA. More specifically, the adhesive layer 136 according to an embodiment of the present invention is provided between the first partition wall 133b and the second partition wall 133c, and at the same time also on the first partition wall 133b and the second partition wall 133c. provided to be in contact with a side surface of the second alignment layer 135 and a lower surface of the second electrode 140 . The adhesive layer 136 according to an example of the present invention has an increased contact area by the first and second barrier ribs 133b and 133c and is disposed between the first alignment layer 134 and the second electrode 140 . , it is possible to prevent a gap from being generated between the first partition wall 133b and the second partition wall 133c and the second base film 150 . Therefore, in the light control device 100 according to the first embodiment of the present invention, even if the liquid crystal 131 expands at a high temperature and the internal pressure rises, the space between the first base film 110 and the second base film 150 . Reliability deterioration can be prevented by maintaining the cell gap constant. In addition, in the light control device 100 according to the first embodiment of the present invention, even if the liquid crystal 131 is vertically mounted, it is possible to prevent the image quality from being deteriorated because the liquid crystal 131 is not separated by the partition wall, and the liquid crystal 131 is not separated. Since a separate configuration such as a back cover for solving the downward tilting phenomenon is omitted, costs can be reduced.

The adhesive layer 136 may be a transparent adhesive film such as an optically clear adhesive (OCA) or a transparent adhesive such as an optically clear resin (OCR), but is not limited thereto.

In the light control apparatus 100 according to the first embodiment of the present invention, the width of the barrier rib area PA is within 300 μm, and in this case, the width of the first and second barrier ribs 133b and 133c is preferably 50 μm, respectively. do. When the width of the first partition wall 133b and the second partition wall 133c is 50 μm or more, it may be difficult for the adhesive layer 136 to penetrate between the first partition wall 133b and the second partition wall 133c, and the first partition wall 133b and the first partition wall 133c ( 133b) and when the width of the second partition wall 133c is 50 μm or less, it may be difficult to support the load of the liquid crystal due to gravity. In addition, the alignment layer surrounding the side surfaces of the first partition wall 133b and the second partition wall 133c has a width of 1 to 2 μm, and an adhesive layer 136 disposed between the first partition wall 133b and the second partition wall 133c. The width is preferably 120um. When the width of the alignment layer is 1 to 2 μm or more, it may be difficult for the adhesive layer 136 to penetrate, and when the width of the adhesive layer 136 is 120 μm or less, the adhesive strength may be slightly lowered.

3 is a cross-sectional view of a light control device according to a second embodiment of the present invention. The light control apparatus 100 illustrated in FIG. 3 is the same as the light control apparatus 100 according to the first embodiment described with reference to FIGS. 1 and 2 , except for the barrier layer 133 . Accordingly, in the following description, only the barrier layer 133 will be described, and repeated descriptions of the same configuration will be omitted.

Referring to FIG. 3 , the barrier rib layer 133 of the light control device 100 according to the second embodiment of the present invention includes a barrier rib connecting layer 133a, a first barrier rib 133b, a second barrier rib 133c, and It consists of a plurality of partition walls including the third partition wall 133d.

The barrier rib connecting layer 133a is disposed over the entire region of the first electrode 120 to connect the plurality of first barrier ribs 133b, second barrier ribs 133c, and third barrier ribs 133d.

The first partition wall 133b, the second partition wall 133c, and the third partition wall 133d are spaced apart from each other and disposed in one partition wall area PA. The first partition wall 133b is disposed adjacent to one side of the first liquid crystal cell LCC1 disposed in the first liquid crystal area LCA1 , and the second partition wall 133c is disposed in the second liquid crystal area LCA2 disposed in the second liquid crystal area LCA2 . 2 It is disposed adjacent to one side of the liquid crystal cell (LCC2). The third partition wall 133d according to the second embodiment of the present invention is disposed between the first partition wall 133b and the second partition wall 133c, and has a lower height than the first partition wall 133b and the second partition wall 133c. have In the light control apparatus 100 according to the second embodiment of the present invention, since the third barrier rib 133d has a low height, a larger amount of the adhesive layer 136 may be disposed in the barrier rib area PA. In this case, the third partition wall 133d according to an example may be formed of two.

The first barrier rib 133b is surrounded by a first alignment layer 134 . In this case, the first alignment layer 134 surrounding the first barrier rib 133b is disposed to be in contact with one side of the first liquid crystal cell LCC1 . . In addition, the second partition wall 133c is surrounded by the first alignment layer 134 , and in this case, the first alignment layer 134 surrounding the second partition wall 133c is disposed to contact one side of the second liquid crystal cell LCC2 . do. In addition, the third partition wall 133d is surrounded by the first alignment layer 134 , and in this case, the first alignment layer 134 surrounding the third partition wall 133d is in contact with the adhesive layer 136 .

Such a structure is repeated for each liquid crystal area LCA and the barrier rib area PA, so that one liquid crystal cell LCC2 has a first barrier rib 133b and a second barrier rib provided in different barrier rib areas PA1 and PA2. (133c) can be demarcated. The first partition wall 133b and the second partition wall 133c separate the liquid crystal 131 and the dichroic dye 132 provided in different liquid crystal cells LCC, and thus the liquid crystal (LCC) provided for each liquid crystal cell LCC. 131) and the dichroic dye 132 are maintained so that the light control device 100 can evenly implement the light blocking mode.

In addition, the first partition wall 133b, the second partition wall 133c, and the third partition wall 133d maintain a cell gap between the first base film 110 and the second base film 150 . . In the light control apparatus 100 according to the second embodiment of the present invention, the first partition wall 133b, the second partition wall 133c, and the third partition wall 133d are spaced apart from each other in one partition wall area PA. By disposing , the adhesive layer 136 may be provided in a space between the first partition wall 133b, the second partition wall 133c, and the third partition wall 133d. Since the adhesive layer 136 has an increased adhesive force as the contact area increases, the adhesive layer 136 is formed in a space between the first partition wall 133b, the second partition wall 133c, and the third partition wall 133d, and the first partition wall 133d. Adhesion may be increased by making contact with upper portions of the partition wall 133b, the second partition wall 133c, and the third partition wall 133d. That is, in the light control apparatus 100 according to the second embodiment of the present invention, the first barrier rib 133b, the second barrier rib 133c, and the third barrier rib 133d are disposed in one barrier rib area PA. Since the contact area of the adhesive layer 136 is increased, it is possible to prevent a gap from being generated between the barrier rib and the second base film 150 . Therefore, in the light control device 100 according to the second embodiment of the present invention, even if the liquid crystal 131 included in the liquid crystal cell LCC expands at a high temperature to increase the internal pressure, the first base film 110 and the second By maintaining a constant cell gap between the two base films 150 , it is possible to prevent deterioration of reliability. In addition, the light control device 100 according to the second embodiment of the present invention can prevent the image quality from being deteriorated because the liquid crystal 131 is partitioned by the barrier rib and does not separate even when it is vertically mounted.

Also, in the light control apparatus 100 according to the second embodiment of the present invention, the width of the barrier rib area PA is the same as that of the light control apparatus 100 according to the first embodiment, but in one barrier rib area PA. A larger number of partition walls 133 are included. Accordingly, in the light control apparatus 100 according to the second embodiment of the present invention, the width of the barrier ribs 133 is narrower than that of the light control apparatus 100 according to the first embodiment, and the number of the barrier ribs 133 increases. However, a large amount of the adhesive layer 136 may be disposed between the plurality of partition walls 133 and on the partition walls. Accordingly, the light control apparatus 100 according to the second embodiment of the present invention may have an increased adhesive force than the light control apparatus 100 according to the first embodiment.

In the light control apparatus 100 according to the second embodiment of the present invention, the width of the barrier rib area PA is within 300 μm, and in this case, the first barrier rib 133b, the second barrier rib 133c, and two third barrier ribs ( 133d) each preferably has a width of 20 μm. When the width of the barrier ribs 133 is 20 μm or more, it may be difficult for the adhesive layer 136 to penetrate between the plurality of barrier ribs 133. It can be difficult. In addition, the width of the alignment layer surrounding the side surfaces of the first partition wall 133b, the second partition wall 133c, and the third partition wall 133d is preferably within 1 to 2 μm. In addition, the adhesive layer 136 disposed between the first partition wall 133b and the third partition wall 133d, between the two third partition walls 133d, and between the third partition wall 133d and the second partition wall 133c. The width is preferably 33 μm, respectively. When the width of the alignment layer is 1 to 2 μm or more, it may be difficult for the adhesive layer 136 to penetrate.

FIG. 4A is a plan view of a light control device according to a third embodiment of the present invention, showing a barrier rib layer 133 , a first alignment layer 134 , and an adhesive layer 136 disposed on the first base film 110 . It is a drawing, and FIG. 4B is a cross-sectional view of a light control device according to a third embodiment of the present invention. The light control apparatus 100 illustrated in FIGS. 4A and 4B is the same as the light control apparatus 100 according to the first embodiment described with reference to FIGS. 1 and 2 , except for the barrier layer 133 . Accordingly, in the following description, only the barrier layer 133 will be described, and repeated descriptions of the same configuration will be omitted.

4A and 4B , the barrier rib layer 133 of the light control device 100 according to the third embodiment of the present invention includes a barrier rib connecting layer 133a, a first barrier rib 133b, and a second barrier rib 133c. ), and a plurality of partition walls including the fourth partition wall 133e.

The barrier rib connecting layer 133a is disposed over the entire region of the first electrode 120 to connect the plurality of first barrier ribs 133b, second barrier ribs 133c, and fourth barrier ribs 133e.

The first partition wall 133b, the second partition wall 133c, and the fourth partition wall 133e are respectively spaced apart and disposed in one partition wall area PA. The first partition wall 133b is disposed adjacent to one side of the first liquid crystal cell LCC1 disposed in the first liquid crystal area LCA1 , and the second partition wall 133c is disposed in the second liquid crystal area LCA2 disposed in the second liquid crystal area LCA2 . 2 It is disposed adjacent to one side of the liquid crystal cell (LCC2). The fourth partition wall 133e is disposed between the first partition wall 133b and the second partition wall 133c. The fourth partition wall 133e according to the third embodiment of the present invention has a hexagonal column shape with an empty interior. In addition, the fourth partition wall 133e has a honeycomb structure inside in a planar structure. In the light control device 100 according to the third exemplary embodiment of the present invention, the fourth partition wall 133e has a hexagonal pillar shape with an empty interior, not a simple pillar shape, so that the contact of the adhesive layer 136 inside the pillar As the area increases, a larger amount of the adhesive layer 136 may be disposed in the partition wall area PA.

In addition, the first partition wall 133b, the second partition wall 133c, and the fourth partition wall 133e maintain a cell gap between the first base film 110 and the second base film 150 . . In the light control apparatus 100 according to the third embodiment of the present invention, the first partition wall 133b, the second partition wall 133c, and the fourth partition wall 133e are spaced apart from each other in one partition wall area PA. By disposing , the adhesive layer 136 may be provided in a space between the first partition wall 133b, the second partition wall 133c, and the fourth partition wall 133e. Since the adhesive layer 136 has an increased adhesive force as the contact area increases, the adhesive layer 136 is formed in a space between the first partition wall 133b, the second partition wall 133c, and the fourth partition wall 133e, and the first partition wall 133e. Adhesion may be increased by making contact with upper portions of the partition wall 133b, the second partition wall 133c, and the fourth partition wall 133e. That is, in the light control apparatus 100 according to the third embodiment of the present invention, the first barrier rib 133b, the second barrier rib 133c, and the fourth barrier rib 133e are disposed in one barrier rib area PA. Since the contact area of the adhesive layer 136 is increased, it is possible to prevent a gap from being generated between the barrier rib and the second base film 150 . Therefore, in the light control device 100 according to the third embodiment of the present invention, even if the liquid crystal 131 included in the liquid crystal cell LCC expands at a high temperature to increase the internal pressure, the first base film 110 and the second By maintaining a constant cell gap between the two base films 150 , it is possible to prevent deterioration of reliability. In addition, the light control apparatus 100 according to the third embodiment of the present invention can prevent the image quality from being deteriorated because the liquid crystal 131 is partitioned by the barrier rib and does not come off even when it is vertically mounted.

In the light control apparatus 100 according to the third embodiment of the present invention, the width of the barrier rib area PA is within 300 μm, and in this case, the width of the first and second barrier ribs 133b and 133c is 50 μm, respectively, and 4 The width of the partition wall (133e) is preferably within 150um. When the width of the fourth partition wall 133e is 150 μm or more, it may be difficult for the adhesive layer 136 to penetrate between the plurality of partition walls 133. When the width of the fourth partition wall 133e is 150 μm or less, the liquid crystal due to gravity It can be difficult to support the load. In addition, the width of the alignment layer surrounding the side surfaces of the first partition wall 133b, the second partition wall 133c, and the fourth partition wall 133e is preferably within 1 to 2 μm. In addition, the width of the adhesive layer 136 disposed between the first partition wall 133b and the fourth partition wall 133e and between the fourth partition wall 133e and the second partition wall 133c is preferably 25 μm, respectively. 4 The width of the adhesive layer 136 disposed inside the partition wall 133e is preferably 50 μm. When the width of the alignment layer is 1 to 2 μm or more, it may be difficult for the adhesive layer 136 to penetrate between the partition walls 133, and when the width of the adhesive layer 136 disposed inside the fourth partition wall 133e is 50 μm or less, the adhesive strength is slightly lowered can be

5A is a perspective view of a light control device according to a fourth embodiment of the present invention, illustrating a barrier rib layer 133 , a first alignment layer 134 , and an adhesive layer 136 disposed on the first base film 110 . it is one drawing 5B is a plan view of a light control device according to a fourth embodiment of the present invention, illustrating the second electrode 140 and the second alignment layer 135 disposed on the second base film 150 . The light control device 100 shown in FIGS. 5A and 5B is the light control device according to the first embodiment described with reference to FIGS. 1 and 2 , except for the arrangement of the liquid crystal area LCA and the barrier rib area PA. Same as (100). Accordingly, in the following description, only the liquid crystal region LCA and the barrier rib region PA will be described, and overlapping descriptions of the same configuration will be omitted.

5A and 5B , in the light control apparatus 100 according to the fourth embodiment of the present invention, a stripe-shaped liquid crystal area LCA and a barrier rib area PA on the first base film 110 . ) is repeated and arranged side by side. Accordingly, in the light control device 100 according to the fourth exemplary embodiment of the present invention, the liquid crystal cells LCC disposed in the liquid crystal area LCA are also elongated in a stripe shape, and the first partition wall disposed in the partition wall area PA. 133b, the second partition wall 133c, and the adhesive layer 136 are also elongated in a stripe shape.

In addition, the second alignment layer 135 disposed on the second base film 150 may have a stripe shape to overlap the liquid crystal area LCA, and to overlap the barrier rib area PA between the second alignment layers 135 . The second electrode 140 is exposed.

6A is a perspective view of a light control device according to a fifth embodiment of the present invention, illustrating a barrier rib layer 133 , a first alignment layer 134 , and an adhesive layer 136 disposed on the first base film 110 . it is one drawing 6B is a plan view of a light control device according to a fifth embodiment of the present invention, illustrating the second electrode 140 and the second alignment layer 135 disposed on the second base film 150 . The light control device 100 illustrated in FIGS. 6A and 6B is the light control device according to the first embodiment described with reference to FIGS. 1 and 2 except for the arrangement of the liquid crystal area LCA and the barrier rib area PA. Same as (100). Accordingly, in the following description, only the liquid crystal region LCA and the barrier rib region PA will be described, and overlapping descriptions of the same configuration will be omitted.

Referring to FIGS. 6A and 6B , the light control apparatus 100 according to the fifth embodiment of the present invention includes an island-shaped barrier rib area PA and a barrier rib area PA on the first base film 110 . ) surrounding the liquid crystal region LCA. Accordingly, in the light control apparatus 100 according to the fifth exemplary embodiment of the present invention, the first partition wall 133b, the second partition wall 133c, and the adhesive layer 136 disposed in the partition wall area PA are also disposed in an island shape. and the liquid crystal cell LCC disposed in the liquid crystal area LCA also has a shape surrounding the barrier rib area PA. In the light control apparatus 100 according to the fifth embodiment of the present invention, the liquid crystal region LCA repeats the island-shaped barrier rib area PA, thereby increasing the bonding force between the barrier rib and the alignment layer. , the reliability of the device may be increased compared to the light control device 100 according to the fourth embodiment in which the liquid crystal region LCA and the barrier rib region PA in the form of stripes are repeated.

In addition, the second alignment layer 135 disposed on the second base film 150 is disposed to overlap the liquid crystal region LCA, and the second electrode ( 140) is exposed.

7 is a perspective view of a transparent display device according to an embodiment of the present invention. 8 is a cross-sectional view of a transparent display panel according to an exemplary embodiment of the present invention. 9 is a cross-sectional view of a transparent display device according to an embodiment of the present invention.

Referring to FIG. 7 , a transparent display device according to an exemplary embodiment includes a light control device 100 , an adhesive unit 200 , and a transparent display panel 300 .

The light control apparatus 100 may be one of the light control apparatuses shown in FIGS. 1 to 6B . In the light control device 100 of the present invention, the liquid crystal area LCA in which the liquid crystal cell LCC is disposed and the partition wall area PA in which the partition wall is disposed are repeatedly disposed. The light control device 100 of the present invention increases the adhesive force of the adhesive layer 136 by arranging a plurality of barrier ribs in one barrier rib area PA, so that even in a high temperature and high humidity environment, the first base film 110 and the second The cell gap between the base films 150 may be maintained constant, and thus, the reliability of the transparent display device may be prevented from being deteriorated. In addition, the light control device 100 of the present invention can prevent the image quality from being deteriorated because the liquid crystal 131 is partitioned by the barrier rib and does not separate even when it is vertically mounted.

The bonding unit 200 bonds the light control device 100 and the transparent display panel 300 to each other. The adhesive part 200 may be a transparent adhesive film such as an optically clear adhesive (OCA) or a transparent adhesive such as an optically clear resin (OCR).

Referring to FIG. 8 , the transparent display panel 300 includes a transmission area TA and an emission area EA. The transparent display panel 300 may see an object or a background positioned on the rear surface of the transparent display panel 100 from the transparent area TA, and may display an image from the light emitting area EA.

The transmission area TA is an area that substantially passes incident light. The light emitting area EA is an area through which light is emitted. The light emitting area EA may include a plurality of pixels P, and each of the pixels P may include a red light emitting part, a green light emitting part, and a blue light emitting part, but is not limited thereto.

The pixel P may include a transistor T, an anode electrode AND, an organic layer EL, and a cathode electrode CAT.

The transistor T includes an active layer ACT provided on the first substrate S1, a first insulating layer I1 provided on the active layer ACT, and a gate electrode GE provided on the first insulating layer I1. , a second insulating layer I2 provided on the gate electrode GE, a source provided on the second insulating layer I2 and connected to the active layer ACT through the first and second contact holes H1 and H2 It includes an electrode SE and a drain electrode DE. 8 illustrates that the transistor T is a top gate type, but the present invention is not limited thereto, and a bottom gate type in which the gate electrode GE is disposed under the active layer ACT may be used.

The anode electrode AND is connected to the drain electrode DE of the transistor T through a third contact hole H3 penetrating the interlayer insulating layer ILD provided on the source electrode SE and the drain electrode DE. do. A bank W is provided between the anode electrodes AND adjacent to each other, so that the anode electrodes AND adjacent to each other may be electrically insulated.

The 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.

The 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, holes and electrons move to the organic emission layer through the hole transport layer and the electron transport layer, respectively, and combine with each other in the organic emission layer to emit light. Accordingly, the light emitting area EA includes an area where the anode electrode AND, the organic light emitting layer EL, and the cathode electrode CAT overlap.

8 illustrates that the transparent display panel 300 is implemented in a top emission method, but is not limited thereto, and may be implemented in a bottom emission method. In the top emission method, since light from the organic layer EL is emitted in the direction of the second substrate S2 , the transistor T may be widely provided under the bank W and the anode electrode AND. Accordingly, the top emission method has an advantage in that the design area of the transistor T is wider than that of the bottom emission method. In the top emission method, it is preferable that the anode electrode AND is formed of a metal material having high reflectance 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 and IZO.

Referring to FIG. 9 , the transparent display panel 300 according to an embodiment of the present invention includes a transmission area TA through which incident light substantially passes and an emission area EA through which light is emitted. In addition, the light control apparatus 100 according to an embodiment of the present invention includes a liquid crystal region LCA capable of implementing a light blocking mode and a barrier rib region PA in which a plurality of barrier ribs are disposed. In this case, in the transparent display device according to an embodiment of the present invention, the transmission area TA of the transparent display panel 300 overlaps the liquid crystal area LCA of the light control device 100 , and the transparent display panel 300 emits light. The area EA overlaps the barrier rib area PA of the light control apparatus 100 . Accordingly, in the transparent display device according to an embodiment of the present invention, when no voltage is applied to the light control device 100 , an object or a background positioned on the rear surface of the transparent display device through the liquid crystal region LCA and the transmission region TA can be seen In addition, the transparent display device according to an embodiment of the present invention may display an image while light emitted from the light emitting area EA of the transparent display panel 300 passes through the barrier rib area PA.

Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications may be made within the scope without departing from the technical spirit of the present invention. . Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The protection scope of the present invention should be construed by the claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: light control device 110: first base film
120: first electrode 130: liquid crystal layer
131: liquid crystal 132: dichroic dye
133: barrier rib layer 133a: barrier rib connection layer
133b: first barrier rib 133c: second barrier rib
133d: third bulkhead 133e: fourth bulkhead
134: first alignment layer 135: second alignment layer
136: adhesive layer 140: second electrode
150: second base film 200: adhesive part
300: transparent display panel

Claims (12)

a first base film including a liquid crystal region and a barrier rib region that are repeatedly provided;
a first electrode disposed on the first base film;
a liquid crystal cell disposed on the first electrode and disposed in the liquid crystal region; and
It is disposed on one side of the liquid crystal cell and includes a partition wall disposed in the partition wall region,
A plurality of partition walls are disposed in the one partition wall area,
The liquid crystal cell includes a first liquid crystal cell disposed in a first liquid crystal region and a second liquid crystal cell disposed in a second liquid crystal region,
In the partition wall region between the first liquid crystal region and the second liquid crystal region,
a first partition wall partitioning the first liquid crystal cell and a second partition wall spaced apart from the first partition wall and partitioning the second liquid crystal cell; and
a third barrier rib disposed between the first barrier rib and the second barrier rib and having a height lower than that of the first and second barrier ribs;
An adhesive layer is disposed in the barrier rib region. The method of claim 1,
a barrier rib layer having the plurality of barrier ribs in an uneven shape on the first electrode; and
Further comprising a first alignment layer disposed on the barrier layer,
The adhesive layer is disposed on the first alignment layer and is provided between the plurality of barrier ribs. 3. The method of claim 2,
The adhesive layer is provided on the plurality of barrier ribs, the light control device. 3. The method of claim 2,
a second alignment layer on the liquid crystal cell;
a second electrode disposed on the second alignment layer; and
It further comprises a second base film disposed on the second electrode,
The second alignment layer is disposed on the liquid crystal region, and the adhesive layer is disposed on one side and the other side. delete delete a first base film including a liquid crystal region and a barrier rib region that are repeatedly provided;
a first electrode disposed on the first base film;
a liquid crystal cell disposed on the first electrode and disposed in the liquid crystal region; and
It is disposed on one side of the liquid crystal cell and includes a partition wall disposed in the partition wall region,
A plurality of partition walls are disposed in the one partition wall area,
The liquid crystal cell includes a first liquid crystal cell disposed in a first liquid crystal region and a second liquid crystal cell disposed in a second liquid crystal region,
In the partition wall region between the first liquid crystal region and the second liquid crystal region,
a first partition wall dividing the first liquid crystal cell and a second partition wall spaced apart from the first partition wall and partitioning the second liquid crystal cell; and
and a fourth barrier rib disposed between the first barrier rib and the second barrier rib and having an empty hexagonal pillar shape. 8. The method of any one of claims 1 or 7,
In the first base film, the liquid crystal region and the barrier rib region in a stripe shape are repeatedly arranged in parallel. 8. The method of any one of claims 1 or 7,
and the first base film includes an island-shaped barrier rib region and the liquid crystal region surrounding the barrier rib region. 8. The method of any one of claims 1 or 7,
The liquid crystal cell is a light control device including liquid crystal and a dichroic dye capable of realizing a black state of the light blocking mode by light absorption. a transparent display panel including a transmissive area and a light emitting area, wherein pixels for displaying an image are provided in the light emitting area; and
It comprises the light control device according to any one of claims 1 or 7 disposed on one surface of the transparent display panel,
The liquid crystal region of the light control device overlaps the transmission region of the transparent display panel, and the barrier rib region of the light control device overlaps the emission region of the transparent display panel. 12. The method of claim 11,
The transparent display panel,
a transistor on the first substrate;
an anode electrode electrically connected to the transistor;
an organic light emitting layer disposed on the anode electrode; and
a cathode electrode disposed on the organic light emitting layer;
The light emitting region includes a region in which the anode electrode, the organic light emitting layer, and the cathode electrode overlap.

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