Light control panel and transparent display device including the same

Abstract

The invention relates to a light control panel and a transparent display device including the same. The light control panel may include a first electrode and a second electrode disposed opposite each other, and a dielectric layer disposed between the first electrode and the second electrode, where the dielectric layer includes a first dielectric and a second dielectric, the first dielectric including a first dielectric material having a first dielectric constant and a recess, the second dielectric including a second dielectric material having a second dielectric constant, and the recess having a second dielectric constant. The second dielectric includes a plurality of opaque particles and a solvent, the solvent including a second dielectric material having a second dielectric constant less than the first dielectric constant.

Description

Technical Field

[0001] The present disclosure relates to a light control panel and a transparent display device including the light control panel, and more specifically, for example but not limited to, to a light control panel capable of realizing a light blocking mode for blocking light and a light transmitting mode for transmitting light and a transparent display device including the light control panel. Background Art

[0002] Recently, research on transparent display devices that allow users to see an object or image located on the rear surface of the display device has been actively conducted. The transparent display device includes a display area that displays an image. The display area includes a transmission area that can transmit external light and a non-transmission area. Through the transmission area, high light transmittance can be achieved in the display area. Unlike conventional display devices, these transparent display devices have a transmission area, and by considering the transmission area, research is prompted to maintain a certain level of contrast even in a dark or illuminated environment.

[0003] The description provided in this Description of Related Art section should not be assumed to be prior art simply because it is mentioned in or associated with the description of the Related Art section. The discussion of the Related Art section may include information that describes one or more aspects of the subject technology, and the descriptions in this section do not limit the present disclosure. Summary of the invention

[0004] In one or more aspects, the present disclosure is directed to providing a light control panel capable of realizing a light blocking mode for blocking light and a light transmitting mode for transmitting light, and a transparent display device including the light control panel.

[0005] One aspect of the present disclosure relates to a light control panel capable of improving light transmittance in a light transmission mode and a transparent display device including the light control panel.

[0006] Another aspect of the present disclosure relates to providing a light control panel and a transparent display device including the light control panel, which can improve ESG (environmental / social / governance) quality by reducing the generation of greenhouse gases caused by a manufacturing process for producing the display device.

[0007] Additional advantages and features of the present disclosure will be described in part in the following description, and in part will become apparent to those skilled in the art upon examination of the following description, or may be learned from the practice of the present disclosure. Other benefits of the present disclosure may be realized and obtained through the structures particularly pointed out in the written description and its claims as well as the drawings.

[0008] To achieve these and other advantages and aspects of the present disclosure, as embodied and broadly described herein, in one or more aspects, a light control panel is provided, the light control panel comprising a first electrode and a second electrode disposed opposite to each other and a dielectric layer disposed between the first electrode and the second electrode, wherein the dielectric layer comprises a first dielectric and a second dielectric, the first dielectric comprising a first dielectric material and a groove, the first dielectric material having a first dielectric constant, the second dielectric comprising a plurality of light-shielding particles and a solvent, the solvent comprising a second dielectric material, the second dielectric material having a second dielectric constant less than the first dielectric constant.

[0009] In one or more aspects of the present disclosure, a transparent display device is provided, comprising: a display panel, which includes a transmission area for transmitting external light and a non-transmission area on which a plurality of pixels are arranged; a light control panel, which includes a first electrode, a second electrode and a dielectric layer arranged between the first electrode and the second electrode, the dielectric layer including: a first dielectric, the first dielectric including a first dielectric material, a guide pattern having a curved top surface and a groove arranged on at least one side of the guide pattern; and a second dielectric, the second dielectric including a plurality of light-shielding particles and a second dielectric material.

[0010] Additional features, advantages, and aspects of the present disclosure are set forth in part in the following description, and in part will become apparent from the present disclosure, or may be learned by practicing the inventive concepts provided herein. Other features, advantages, and aspects of the present disclosure may be realized and obtained by the description provided in the present disclosure, and the claims and drawings of the present disclosure, or may be derived therefrom. All of these features, advantages, and aspects are intended to be included in this specification, within the scope of the present disclosure, and protected by the appended claims. Nothing in this section shall be construed as a limitation on these claims. Other aspects and advantages are discussed below in conjunction with the embodiments of the present disclosure.

[0011] It is to be understood that both the foregoing general description and the following detailed description of the present disclosure are exemplary and explanatory and are intended to provide further explanation of the disclosure as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings, which are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. In the drawings:

[0013] Figure 1 is a perspective view showing a transparent display device according to one or more example embodiments of the present disclosure;

[0014] Figure 2is a plan view showing a transparent display panel according to one or more example embodiments of the present disclosure;

[0015] Figure 3 It shows that the setting Figure 2 FIG. 1 shows an example of a transmissive area and a non-transmissive area in a display area of ​​;

[0016] Figure 4 It is shown Figure 3 A cross-sectional view of an example of I-I';

[0017] Figure 5 is a perspective view showing a light control panel according to one or more example embodiments of the present disclosure;

[0018] Figure 6 It is in light blocking mode. Figure 5 A cross-sectional view of an example of one side;

[0019] Figure 7 is a cross-sectional view showing an example of an arrangement relationship between components of a transparent display panel and components of a light control panel;

[0020] Figure 8 It is shown in the light transmission mode Figure 5 A cross-sectional view of an example of one side;

[0021] Fig. 9 is a plan view showing an example of a spacer, a guide pattern, and a groove;

[0022] Fig.10 It is in light blocking mode. Figure 5 A cross-sectional view of another example of one side;

[0023] Fig.11 It is shown in the light transmission mode Figure 5 A cross-sectional view of another example of one side;

[0024] Fig.12 is a plan view showing another example of a spacer, a guide pattern, and a groove;

[0025] Fig.13 is a plan view showing another example of a spacer, a guide pattern, and a groove;

[0026] Fig.14 is a diagram showing a difference in the direction of an electric field according to the shape of a guide pattern of a first dielectric; and

[0027] Fig.15 is a graph showing a difference in the direction of an electric field according to a difference between the dielectric constant of a first dielectric and the dielectric constant of a second dielectric.

[0028] Throughout the drawings and detailed description, unless otherwise described, the same drawing reference numerals should be understood to refer to the same elements, features, and structures. The relative sizes and depictions of these elements may be exaggerated for clarity, illustration, and convenience. DETAILED DESCRIPTION

[0029] Reference will now be made in detail to embodiments of the present disclosure, examples of which may be illustrated in the accompanying drawings. The described progression of processing steps and / or operations is an example; however, the order of steps and / or operations is not limited to the order set forth herein, and may be varied as is known in the art, except for steps and / or operations that must occur in a particular order. The names of corresponding elements used in the following description may be selected solely for ease of writing the specification, and therefore may differ from the names used in the actual product.

[0030] The advantages and features of the present disclosure and methods for implementing the same will be illustrated by the following example embodiments described with reference to the accompanying drawings. However, the present disclosure may be embodied in different forms and should not be construed as being limited to the example embodiments set forth herein. On the contrary, these example embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. In addition, the present disclosure is limited only by the scope of the claims.

[0031] The shapes, sizes, ratios, angles, and quantities, etc., disclosed in the accompanying drawings for describing the embodiments of the present disclosure are merely examples, and therefore the present disclosure is not limited to the details shown. The same reference numerals always refer to the same elements. In the following description, when it is determined that the detailed description of the related known technology unnecessarily obscures the various aspects of the present disclosure, the detailed description will be omitted. In the case of using "including", "having", "including", "containing", "constituting", "made of", "formed", etc. described in the present disclosure, another part may be added unless "only" is used. Unless otherwise mentioned, terms in the singular form may include plural forms.

[0032] When explaining an element, the element is interpreted as including a range of errors, even if not explicitly described. Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0033] When describing a temporal relationship, for example, when describing a temporal precedence relationship such as "after", "then", "next", "before", etc., it may include discontinuous cases unless "immediately" or "directly" is used.

[0034] When describing a positional relationship, for example, when the positional relationship between two parts is described as "on", "above", "below", and "next to", one or more other parts may be provided between the two parts, unless "just" or "directly" is used, that is, one or more other parts may be provided to be located between the two parts. For example, when an element or layer is provided on another element or layer, a third layer or element may be inserted therebetween.

[0035] It will be understood that although the terms "first", "second", "A", "B", "(A)" or "(B)", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present disclosure.

[0036] The term "at least one" should be understood to include any and all combinations of one or more associated listed items. For example, the meaning of "at least one of the first, second, and third items" means the combination of all items proposed from two or more of the first, second, and third items as well as the first, second, or third item.

[0037] The features of various embodiments of the present disclosure may be combined or combined with each other in part or in whole, and may interoperate and technically drive each other in various ways. The embodiments of the present disclosure may be performed independently of each other, or may be performed together in a mutually dependent relationship.

[0038] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the example embodiments belong. It will also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having, for example, a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined as such herein. For example, the term "component" or "unit" may apply, for example, to a separate circuit or structure, an integrated circuit, a computing block of a circuit device, or any structure configured to perform the described function, as will be understood by one of ordinary skill in the art.

[0039] The features of various embodiments of the present disclosure may be combined with each other in part or in whole, and may be technically related to or interoperable with each other. The embodiments may be implemented independently of each other, or may be implemented together in an associated relationship.

[0040] Hereinafter, an example of a display device according to the present disclosure is described with reference to the accompanying drawings. When assigning reference numerals to components in each of the accompanying drawings, the same components may have the same numerals as much as possible, even if shown in different drawings. In addition, when it is determined that the detailed description of the related known technology unnecessarily obscures the focus of the present disclosure, the detailed description will be omitted.

[0041] Hereinafter, with reference to the accompanying drawings, one or more exemplary embodiments of the present disclosure will be described. For convenience of explanation, the scale of components shown in the drawings is different from the actual scale, and therefore is not limited to the scale shown in the drawings.

[0042] Figure 1 is a perspective view illustrating a transparent display device according to one or more example embodiments of the present disclosure.

[0043] Although the transparent display device 10 according to one or more example embodiments of the present disclosure is described as an organic light emitting display device (OLED), the transparent display device 10 may be implemented as a liquid crystal display (LCD) device, a quantum dot light emitting display (QLED) device, or an electrophoretic display device, and is not limited thereto.

[0044] Reference Figure 1 The transparent display device 10 according to one or more exemplary embodiments of the present disclosure includes a transparent display panel 100 and a light control panel 200, but is not limited thereto. For example, the light control panel 200 may be disposed below the transparent display panel 100, but is not limited thereto.

[0045] The transparent display panel 100 is provided with a plurality of pixels to display an image. For example, the display area of ​​the transparent display panel 100 includes a plurality of pixels P to display an image. As an example, one or more additional components may also be included. The transparent display panel 100 may include a transmission area in at least some areas. The transmission area may allow most of the light incident from the outside to pass through. The transmission area may be provided between a plurality of pixels. The transparent display panel 100 allows an external object or a background scene to be visible due to the transmission area.

[0046] The light control panel 200 may be disposed on at least one side of the transparent display panel 100, and may control the light incident on the transparent display panel 100. The light control panel 200 may include an electrophoretic element moved by an electric field. The light control panel 200 may control the movement of the electrophoretic element to achieve a light blocking mode and a light transmitting mode. The electrophoretic element may switch from a light blocking mode to a light transmitting mode or from a light transmitting mode to a light blocking mode depending on whether a voltage is applied. The light control panel 200 may block incident light in a light blocking mode and transmit incident light in a light transmitting mode. In this article, the electrophoretic element is shown as an example, and the light control panel 200 may be modified in various ways as long as the function of switching the light blocking mode and the light transmitting mode is satisfied.

[0047] The light control panel 200 may preferably be disposed in a direction opposite to the direction in which the transparent display panel 100 emits light. Figure 1 As shown, when the transparent display panel 100 is a top emission type, the light control panel 200 may be disposed below the transparent display panel 100. For another example, when the transparent display panel 100 is a bottom emission type, the light control panel 200 may be disposed above the transparent display panel 100.

[0048] The light control panel 200 may be bonded to one surface of the transparent display panel 100. For example, the light control panel 200 may be bonded to one surface of the transparent display panel 100 using an adhesive layer, but is not limited thereto. The adhesive layer 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.

[0049] exist Figure 1 In the embodiment of the present invention, it is illustrated that the light control panel 200 is provided on one surface exposed to the outside of the transparent display panel 100, but it is not necessarily limited thereto. The light control panel 200 may be provided inside the transparent display panel 100. In this case, the light control panel 200 may be provided on the top surface of any one of the plurality of layers provided in the transparent display panel 100. As an example, the light control panel 200 may be provided between the substrate and the transistor of the transparent display panel 100. At this time, the light control panel 200 may not include a separate substrate.

[0050] In the following, reference will be made to Figures 2 to 4 The transparent display panel 100 is described in more detail.

[0051] Figure 2 is a plan view showing a transparent display panel according to one or more example embodiments of the present disclosure, Figure 3 It shows that the setting Figure 2 FIG. 1 is a diagram showing an example of a transmissive area and a non-transmissive area in a display area of ​​, and Figure 4 It is shown Figure 3 I-I' is a cross-sectional view of an example.

[0052] Reference Figures 2 to 4 , the transparent display panel 100 according to one or more example embodiments of the present disclosure may include a display area DA and a non-display area NDA. The non-display area NDA may be disposed around the display area DA. The display area DA includes a plurality of pixels P to display an image, and the non-display area NDA does not display an image.

[0053] The display area DA may include a first signal line SL1, a second signal line SL2, and pixels, but is not limited thereto. The non-display area NDA may include a pad area PA in which pads are arranged and at least one scan driver 205, but is not limited thereto.

[0054] The first signal line SL1 may extend along a first direction in the display area DA. For example, the first signal line SL1 may be a data line, but is not necessarily limited thereto. In addition, the first signal line SL1 may include at least one of a pixel power line, a common power line, and a reference line. The first direction may be a Y-axis direction, but is not limited thereto.

[0055] The second signal line SL2 may extend in the display area DA along a second direction different from the first direction. The second signal line SL2 may intersect the first signal line SL1 in the display area DA. For example, the second signal line SL2 may be a scan line, but is not necessarily limited thereto. The second direction may be an X-axis direction, but is not limited thereto.

[0056] like Figure 3 As shown, the display area DA may include a transmission area TA and a non-transmission area NTA. The transmission area TA is an area that transmits most of the light incident from the outside. The non-transmission area NTA is an area that does not transmit most of the light incident from the outside. For example, the transmission area TA may have a transmittance greater than α%, and the non-transmission area NTA may have a transmittance less than β%. At this time, α is greater than β. Due to the transmission area TA of the transparent display panel 100, the transparent display device 10 may allow viewing of an object or background scene located on the rear surface of the transparent display device 10.

[0057] The non-transmission area NTA includes a light-emitting area EA in which a plurality of pixels P are arranged to emit light. Each of the plurality of pixels P may include a plurality of sub-pixels, such as a first sub-pixel SP1, a second sub-pixel SP2, a third sub-pixel SP3, and a fourth sub-pixel SP4, but is not limited thereto. The first sub-pixel SP1 and the second sub-pixel SP2 may be arranged adjacent to each other in a first row, and the third sub-pixel SP3 and the fourth sub-pixel SP4 may be arranged adjacent to each other in a second row, but are not limited thereto. In addition, the arrangement order of each sub-pixel SP1, SP2, SP3, and SP4 may be changed in various ways. The first sub-pixel SP1 may include a first light-emitting area EA that emits a first color light, and the second sub-pixel SP2 may include a second light-emitting area EA that emits a second color light. The third sub-pixel SP3 may include a third light-emitting area EA that emits a third color light, and the fourth sub-pixel SP4 may include a fourth light-emitting area EA that emits a fourth color light.

[0058] For example, the first to fourth light-emitting areas EA may emit light of different colors. For example, the first light-emitting area EA may emit green light, and the second light-emitting area EA may emit red light. The third light-emitting area EA may emit blue light, and the fourth light-emitting area EA may emit white light. However, it is not necessarily limited to this. In addition, the arrangement order of each sub-pixel SP1, SP2, SP3 and SP4 may be changed in various ways.

[0059] like Figure 4 As shown, each of the first to fourth sub-pixels SP1, SP2, SP3, and SP4 may include a transistor T and a light emitting device E between a lower substrate 111 and an upper substrate 112. The transistor T may be disposed on the lower substrate 111, and the light emitting device E may be disposed above the transistor T. The light emitting device E may include a lower electrode E1, an organic layer EL, and an upper electrode E2. For example, the organic layer EL may be disposed between the lower electrode E1 and the upper electrode E2.

[0060] The transistor T may include an active layer ACT disposed on the lower substrate 111, a first insulating film I1 disposed on the active layer ACT, a gate GE disposed on the first insulating film I1, a second insulating film I2 disposed on the gate GE, a source electrode SE, and a drain electrode DE. The source electrode SE and the drain electrode DE are disposed on the second insulating film I2 and are connected to the active layer ACT through the first contact hole CNT1 and the second contact hole CNT2. For example, the first contact hole CNT1 and the second contact hole CNT2 may pass through the first insulating film I1 and the second insulating film I2. Figure 4 In the figure, the transistor T is illustrated as a top gate type, but it is not necessarily limited thereto, and the transistor T may be a bottom gate type in which the gate electrode GE is disposed below the active layer ACT.

[0061] The planarization film PLN may be disposed on the transistor T to planarize the step difference caused by the transistor T and a plurality of signal lines. In this case, the light emitting device E may be disposed on the planarization film PLN. The planarization film PLN is disposed in the non-transmission area NTA and cannot be disposed in at least a portion of the transmission area TA. The planarization film PLN may cause refraction of light when light passes through, thereby impairing transparency. Therefore, the transparent display panel 100 according to an embodiment of the present disclosure may increase transparency by removing a portion of the planarization film PLN from the transmission area TA.

[0062] In addition, Figure 4In the example, the first insulating film I1 and the second insulating film I2 disposed under the planarization film PLN are illustrated as being disposed not only in the non-transmission area NTA but also in the transmission area TA, but are not necessarily limited thereto. In another example embodiment, some of the insulating films disposed under the planarization film PLN may not be disposed in at least a portion of the transmission area TA in order to increase transparency. For example, the second insulating film I2 may be disposed in the non-transmission area NTA and may not be disposed in at least a portion of the transmission area TA.

[0063] The bank 125 and the light emitting device E including the lower electrode E1, the organic layer EL and the upper electrode E2 may be disposed on the planarization film PLN. Specifically, the lower electrode E1 may be disposed on the planarization film PLN, the bank 125 may be disposed on the lower electrode E1 and the planarization film PLN, the organic layer EL may be disposed on the bank 125 and the lower electrode E1, and the upper electrode E2 may be disposed on the organic layer EL, but is not limited thereto.

[0064] The lower electrode E1 may be disposed on the planarization film PLN for each of the sub-pixels SP1, SP2, SP3, and SP4, and may not be disposed in the transmission area TA. The lower electrode E1 may be electrically connected to the transistor T. Specifically, the lower electrode E1 may be connected to one of the source electrode SE and the drain electrode DE of the transistor T through the third contact hole CNT3 passing through the planarization film PLN. For example, Figure 4 As shown, the lower electrode E1 may be connected to the drain electrode DE of the transistor T through the third contact hole CNT3, but is not limited thereto. The bank 125 is disposed between adjacent lower electrodes E1 so that the adjacent lower electrodes E1 may be electrically insulated from each other.

[0065] The lower electrode E1 may include a highly reflective metal material, such as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and ITO (ITO / Al / ITO), an Ag alloy, a stacked structure of an Ag alloy and ITO (ITO / Ag alloy), a MoTi alloy, and a stacked structure of a MoTi alloy and ITO (ITO / MoTi alloy / ITO). The Ag alloy may be an alloy of silver Ag, palladium Pd, and copper Cu. The MoTi alloy may be an alloy of molybdenum Mo and titanium Ti. The lower electrode E1 may be one of an anode and a cathode, but is not limited thereto. For example, the lower electrode E1 may be an anode.

[0066] The bank 125 may be disposed on the planarization film PLN. In addition, the bank 125 may be disposed to cover the edge of the lower electrode E1 and expose a portion of the lower electrode E1. Therefore, the bank 125 may prevent the problem of reducing light emission efficiency due to current concentration on the end of the lower electrode E1.

[0067] The bank 125 may define a light emitting area EA for each of the sub-pixels SP1, SP2, SP3, and SP4. The light emitting area EA of each of the sub-pixels SP1, SP2, SP3, and SP4 is formed by sequentially stacking a lower electrode E1, an organic layer EL, and an upper electrode E2. Holes from the lower electrode E1 and electrons from the upper electrode E2 are combined with each other in the organic layer EL to emit light. In this case, the area where the bank 125 is formed does not emit light and may be a non-light emitting area NEA. The area where the bank 125 is not formed and the lower electrode E1 is exposed may be a light emitting area EA. For example, the light emitting area EA may be disposed between the non-light emitting areas NEA.

[0068] In the emission area EA of each of the sub-pixels SP1, SP2, SP3, and SP4, the organic layer EL may be disposed on the electrode E1. The organic layer EL may include a hole transport layer, a light emitting layer, and an electron transport layer. In this case, when a voltage is applied to the lower electrode E1 and the upper electrode E2, holes and electrons move to the light emitting layer through the hole transport layer and the electron transport layer, respectively, and combine with each other in the light emitting layer to emit light.

[0069] In one embodiment, the organic layer EL may be a common layer commonly formed in the sub-pixels SP1, SP2, SP3, and SP4. At this time, the light emitting layer may be a white light emitting layer that emits white light, but is not limited thereto.

[0070] In another example embodiment, the organic layer EL may include a light emitting layer formed for each of the sub-pixels SP1, SP2, SP3, and SP4. As an example, a first color light emitting layer emitting a first color light may be formed in the first sub-pixel SP1, a second color light emitting layer emitting a second color light may be formed in the second sub-pixel SP2, a third color light emitting layer emitting a third color light may be formed in the third sub-pixel SP3, and a fourth color light emitting layer emitting a fourth color light may be formed in the fourth sub-pixel SP4. For example, a green light emitting layer emitting green light may be formed in the first sub-pixel SP1, a red light emitting layer emitting red light may be formed in the second sub-pixel SP2, a blue light emitting layer emitting blue light may be formed in the third sub-pixel SP3, and a white light emitting layer emitting white light may be formed in the fourth sub-pixel SP4, but is not limited thereto. In this case, the light emitting layer of the organic layer EL cannot be formed in the transmission area TA.

[0071] The upper electrode E2 may be disposed on the organic layer EL and the bank 125. The upper electrode E2 may be made of a transparent metal material (TCO, transparent conductive material) that can transmit light, such as ITO or IZO, or may be formed of a semi-transmissive conductive material, such as magnesium Mg, silver Ag, or an alloy of magnesium Mg and silver Ag. When the upper electrode E2 is formed of a semi-transmissive conductive material, the light emitting efficiency may be improved due to the microcavity. The upper electrode E2 may be one of an anode and a cathode. For example, the upper electrode E2 may be a cathode.

[0072] The packaging film 140 may be disposed on the light emitting device E. The packaging film 140 may be formed on the upper electrode E2 to cover the upper electrode E2. The packaging film 140 serves to prevent oxygen or moisture from penetrating into the organic layer EL and the upper electrode E2. To this end, the packaging film 140 may include at least one inorganic film and at least one organic film.

[0073] The color filter CF may be disposed on one side of the upper substrate 112 facing the lower substrate 111. The color filter CF may be patterned for each sub-pixel SP1, SP2, SP3, and SP4. Specifically, the color filter CF may include a plurality of color filters corresponding to a plurality of sub-pixels, such as a first color filter, a second color filter, a third color filter, and a fourth color filter. The first color filter may be arranged to correspond to the emission area EA of the first sub-pixel SP1. For example, the first color filter may be a green color filter that transmits green light, but is not limited thereto. The second color filter may be arranged to correspond to the emission area EA of the second sub-pixel SP2. For example, the second color filter may be a red color filter that transmits red light, but is not limited thereto. The third color filter CF3 may be arranged to correspond to the emission area EA of the third sub-pixel SP3. For example, the third color filter CF3 may be a blue color filter that transmits blue light, but is not limited thereto. The fourth color filter may be arranged to correspond to the emission area EA4 of the fourth sub-pixel SP4. For example, the fourth color filter may be a white color filter that transmits white light, but is not limited thereto. The white color filter may be made of a transparent organic material that transmits white light, but is not necessarily limited thereto.

[0074] The black matrix BM may be disposed between the color filters CF. The black matrix BM is disposed between the sub-pixels SP1, SP2, SP3, and SP4 to prevent color mixing between adjacent sub-pixels SP1, SP2, SP3, and SP4. In addition, the black matrix BM may prevent light incident from the outside from being reflected on a plurality of signal lines disposed between the sub-pixels SP1, SP2, SP3, and SP4.

[0075] In addition, the black matrix BM is disposed between the transmission area TA and the plurality of sub-pixels SP1, SP2, SP3, and SP4 to prevent light emitted from each of the plurality of sub-pixels SP1, SP2, SP3, and SP4 from advancing to the transmission area TA. In one embodiment, the black matrix BM cannot be disposed between the white sub-pixel and the transmission area TA. The display panel 110 according to an embodiment of the present disclosure does not include the black matrix BM between the white sub-pixel and the transmission area TA, thereby reducing the area in which the black matrix BM is formed. Thus, the display panel 110 according to an embodiment of the present disclosure can improve the transmittance. The black matrix BM may include a material that absorbs light, such as a black dye that absorbs all light in the visible light wavelength range.

[0076] The color filter CF and the black matrix BM are not disposed in the transmission area TA to maintain a high light transmittance in the transmission area TA. Figure 4 As shown, the color filter CF may be disposed in the emission area EA of the non-transmission area NTA, and the black matrix BM may be disposed in the non-emission area NEA of the non-transmission area NTA, but is not limited thereto.

[0077] As described above, the transparent display device 10 according to the embodiment of the present disclosure includes a transmission area TA that allows most of the light incident from the outside to pass through and an emission area EA that emits light. As a result, in the embodiment of the present disclosure, an object or background scene located on the rear surface or front surface of the transparent display device 10 can be viewed through the transmission area TA of the transparent display device 10.

[0078] The scan driver 205 is connected to the scan line and provides a scan signal. The scan driver 205 may be disposed in the non-display area NDA outside one or both sides of the display area DA of the transparent display panel 100. The scan driver 205 may be formed using a gate-in-panel GIP method or a tape automated bonding TAB method, but is not limited thereto.

[0079] In the following, reference will be made to Figures 5 to 14 The light control panel 200 is described in more detail.

[0080] Figure 5 is a perspective view showing a light control panel according to one or more example embodiments of the present disclosure, Figure 6 It is in light blocking mode. Figure 5 A cross-sectional view of an example of one side, Figure 7 is a cross-sectional view showing an example of an arrangement relationship between components of a transparent display panel and components of a light control panel, Figure 8 It is shown in the light transmission mode Figure 5 A cross-sectional view of an example of one side, and Fig. 9 is a plan view showing an example of a spacer, a guide pattern, and a groove.

[0081] Reference Figures 5 to 9 , the light control panel 200 according to an embodiment of the present disclosure may be implemented to operate in a light transmission mode for transmitting incident light and a light blocking mode for blocking incident light. In an embodiment of the present disclosure, it may be assumed that the light blocking mode is a case where the light transmittance of the light control panel 200 is less than α%, and the light transmission mode is a case where the light transmittance of the light control panel 200 is equal to or greater than β%. At this time, α may be less than β. The light transmittance of the light control panel 200 represents the ratio of the output light to the light incident on the light control panel 200.

[0082] To this end, the light control panel 200 according to the embodiment of the present disclosure includes a first substrate 210, a second substrate 220, a first electrode 230, a second electrode 240, a dielectric layer 250 and an adhesive layer 260, but is not limited thereto. For example, the first electrode 230, the second electrode 240, the dielectric layer 250 and the adhesive layer 260 may be disposed between the first substrate 210 and the second substrate 220.

[0083] Each of the first substrate 210 and the second substrate 220 may be a glass substrate, a plastic film, or a flexible polymer film. When each of the first substrate 210 and the second substrate 220 is a plastic film, a cellulose resin (such as triacetyl cellulose TAC or diacetyl cellulose DAC, etc.), a cycloolefin polymer COP (such as a norbornene derivative, etc.), an acrylic resin (such as a cycloolefin copolymer COC or polymethyl methacrylate PMMA, etc.), a polyolefin (such as polycarbonate PC, polyethylene PE or polypropylene PP, etc.), a polyester (such as polyvinyl alcohol PVA, polyether sulfone PES, polyether ether ketone PEEK, polyether imide PEI, polyethylene naphthalate PEN or polyethylene terephthalate PET, etc.), a sheet or film containing polyimide PI, polysulfone PSF or a fluoride resin, etc., but not necessarily limited thereto.

[0084] like Figure 1 and Figure 5 As shown, the light control panel 200 is disposed outside the transparent display panel 100, and may be disposed in a configuration separated from the transparent display panel 100. In this case, the light control panel 200 may be formed in a film type having flexibility to be disposed on one side of the transparent display panel 100 using a separate adhesive layer, but is not necessarily limited thereto. In another example embodiment, the light control panel 200 may be disposed within the transparent display panel 100. The light control panel 200 may be disposed between the lower substrate 111 and the upper substrate 112 of the transparent display panel 100. In this case, the first substrate 210 and the second substrate 220 may be omitted in the light control panel 200.

[0085] The first electrode 230 may be disposed on a side of the first substrate 210 facing the second substrate 220. The second electrode 240 may be disposed on a side of the second substrate 220 facing the first substrate 210. Each of the first electrode 230 and the second electrode 240 may be formed as an integral electrode overlapping the entire display area DA of the transparent display panel 100. In contrast, when each of the first electrode 230 and the second electrode 240 is formed with a plurality of pattern electrodes, expensive pattern electrode processing costs are generated, and since the electric field is concentrated at both ends of the pattern electrode, light shielding particles may be gathered. In addition, since the plurality of pattern electrodes must be controlled individually, the driving circuit is complicated.

[0086] The light control panel 200 according to the embodiment of the present disclosure includes each of the first electrode 230 and the second electrode 240 formed as one integral electrode, thereby reducing electrode processing costs and simplifying a driving circuit.

[0087] Each of the first electrode 230 and the second electrode 240 may be a transparent electrode. Each of the first electrode 230 and the second electrode 240 may include silver oxide (e.g., AgO or Ag2O or Ag2O3), aluminum oxide (e.g., Al2O3), tungsten oxide (e.g., WO2 or WO3 or W2O3), magnesium oxide (e.g., MgO), molybdenum oxide (e.g., MoO3), zinc oxide (e.g., ZnO), tin oxide (e.g., SnO2), indium oxide (e.g., In2O3), chromium oxide (e.g., CrO3 or Cr2O3), antimony oxide (e.g., Sb2O3 or Sb2O5), titanium oxide (e.g., TiO2), nickel oxide (e.g., NiO), copper oxide (e.g., CuO or Cu2O), vanadium oxide (e.g., V2O3 or V2O5), cobalt oxide (e.g., 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, ITO), Oxide (IZO), aluminum-doped zinc oxide (eg, ZAO), aluminum-doped tin oxide (eg, TAO), or antimony tin oxide (eg, ATO), but is not necessarily limited thereto.

[0088] The dielectric layer 250 may be disposed between the first electrode 230 and the second electrode 240 to implement a light blocking mode or a light transmitting mode depending on whether a voltage is applied to the first electrode 230 and the second electrode 240. In addition, the bonding layer 260 may be disposed between the second electrode 240 and the dielectric layer 250 to bond the dielectric layer 250 to the second electrode 240. For example, when a voltage is applied to the first electrode 230 and the second electrode 240, the dielectric layer 250 may implement a light transmitting mode. On the other hand, when no voltage is applied to the first electrode 230 and the second electrode 240, the dielectric layer 250 may implement a light blocking mode.

[0089] like Figure 6 As shown, the dielectric layer 250 may include a first dielectric 252 and a second dielectric 254, but is not limited thereto. The first dielectric 252 and the second dielectric 254 may be made of different dielectric materials. The light control panel 200 according to an embodiment of the present disclosure may control the direction of the electric field in a desired direction by utilizing the shape of the interface between the first dielectric 252 and the second dielectric 254 and the difference in dielectric constant between the first dielectric 252 and the second dielectric 254.

[0090] Specifically, the first dielectric 252 may be disposed on a side of the first electrode 230 facing the second electrode 240, and may be made of a first dielectric material having a first dielectric constant. The second dielectric 254 may be disposed on a side of the second electrode 240 facing the first electrode 230. In addition, an adhesive layer 260 may be disposed between the second electrode 240 and the dielectric layer 250 to adhere the dielectric layer 250 to the second electrode 240. Figures 6 to 8 As shown, the first dielectric 252 may include a guide pattern 252a, a spacer 252b, and a groove 252c, but is not limited thereto. Figures 6 to 8 As shown, the second dielectric 254 may include a solvent 254 a and a plurality of light-shielding particles 254 b .

[0091] The guide pattern 252a can guide a plurality of light-shielding particles 254b included in the second dielectric 254 to the groove 252c. The groove 252c can be provided between the guide pattern 252a and the spacer 252b. Specifically, the top surface of the guide pattern 252a can be formed to bulge toward the second electrode 240. At this time, the top surface of the guide pattern 252a can be a curved surface, but is not limited thereto. In this case, when a voltage is applied to the first electrode 230 and the second electrode 240, dielectric polarization occurs in the first dielectric material of the guide pattern 252a, and the dielectric polarization density varies according to the shape of the top surface. Therefore, due to the convex shape of the guide pattern 252a, an electric field can be generated in a direction inclined toward the groove 252c.

[0092] The plurality of light-shielding particles 254b included in the second dielectric 254 may move due to the electric field generated between the first electrode 230 and the second electrode 240. When a voltage is applied to the first electrode 230 and the second electrode 240, the plurality of light-shielding particles 254b may move to the groove 252c along the electric field direction. Therefore, the plurality of light-shielding particles 254b cannot be disposed on the region where the guide pattern 252a is disposed, and the region where the guide pattern 252a is disposed may have a high light transmittance. Therefore, external light may be transmitted through the region where the guide pattern 252a is disposed. The light passing through the light control panel 200 may be incident on the transparent display panel 100.

[0093] On the other hand, unlike the present disclosure, the guide pattern 252a may have a flat top surface. In the case where the top surface of the guide pattern 252a is a flat surface, when a voltage is applied to the first electrode 230 and the second electrode 240, a dielectric polarization density may be uniformly formed within the guide pattern 252a. In this case, the electric field may appear in a direction perpendicular to the first electrode 230. When a voltage is applied to the first electrode 230 and the second electrode 240, a plurality of light-shielding particles 254b included in the second dielectric 254 move in a direction perpendicular to the first electrode 230 and the second electrode 240. A plurality of light-shielding particles 254b move into the groove 252c in the region where the groove 252c is formed, but are distributed on the top surface of the guide pattern 252a in the region where the guide pattern 252a is formed. Since a plurality of light-shielding particles 254b are distributed in regions other than the groove 252c, when the top surface of the guide pattern 252a is a flat surface, the light transmittance in the light-transmitting mode is significantly reduced compared to when the top surface of the guide pattern 252a is a curved surface.

[0094] In addition, the guide pattern 252a may have two inclined surfaces whose top surfaces are inclined relative to the center. At this time, the two inclined surfaces may be flat, and the center of the guide pattern 252a may have a sharp shape. When the slope of the two inclined surfaces is small, similar to the flat surface, a plurality of light-shielding particles 254b cannot move to the groove 252c, and may be distributed on the top surface of the guide pattern 252a. Therefore, the light transmittance of the light control panel 200 may be reduced in the light transmission mode. In addition, as the distance between the guide patterns 252a increases, a plurality of light-shielding particles 254b may become more difficult to move into the groove 252c. The distance between the guide patterns 252a may be the distance between the center of one guide pattern 252a and the center of another adjacent guide pattern 252a.

[0095] That is, when the guide pattern 252a has a flat top surface, the light transmittance of the light control panel 200 may be reduced in the light transmission mode.

[0096] On the other hand, as the slopes of the two inclined surfaces increase, light may be transmitted and greatly refracted on the inclined surfaces of the guide pattern 252a in the light transmission mode. Therefore, a double image in which one object is viewed as two objects by the user may occur.

[0097] That is, when the slopes of the two inclined surfaces of the guide pattern 252 a are large, a double image in which one object is viewed as two objects by the user may occur.

[0098] In the light control panel 200 according to the embodiment of the present disclosure, the top surface of the guide pattern 252a can be formed to have a curved surface, so that the direction of the electric field can be controlled to be toward the groove 252c when a voltage is applied to the first electrode 230 and the second electrode 240. Therefore, in the light control panel 200 according to the embodiment of the present disclosure, the plurality of light-shielding particles 254b can be accurately moved to the groove 252c, and a high light transmittance can be achieved in the light transmission mode. In addition, in the light control panel 200 according to the embodiment of the present disclosure, the top surface of the guide pattern 252a is gently inclined, thereby preventing the occurrence of double images.

[0099] The distance between the center of one guide pattern 252a and the center of another adjacent guide pattern 252a may be a first distance d1. The first distance d1 may be a distance from the center of the top surface of one guide pattern 252a (or a point on the top surface having the maximum spacing distance from the first electrode 230) to the center of the top surface of another adjacent guide pattern 252a (or a point on the top surface having the maximum spacing distance from the first electrode 230).

[0100] The guide pattern 252a may be arranged to overlap with the transmission area TA of the transparent display panel 100 so as to achieve high light transmittance in the light transmission mode. The guide pattern 252a may be arranged not to overlap with the non-transmission area NTA of the transparent display panel 100. In the light control panel 200 according to the embodiment of the present disclosure, in the light transmission mode, the plurality of light-shielding particles 254b may move into the groove 252c and may not be arranged in the area where the guide pattern 252a is arranged. In the light control panel 200 according to the embodiment of the present disclosure, external light may be transmitted through the area where the plurality of light-shielding particles 254b are not arranged, that is, the area where the guide pattern 252a is arranged. Since the guide pattern 252a may be arranged to overlap with the transmission area TA of the transparent display panel 100, the light passing through the light control panel 200 is incident on the transparent display panel 100 and may pass through the transparent display panel 100 through the transmission area TA of the transparent display panel 100.

[0101] In this way, external light can penetrate the transparent display device 10 through the area where the guide pattern 252a of the light control panel 200 is provided and the transmission area TA of the transparent display panel 100. In the transparent display device 10 according to the embodiment of the present disclosure, the guide pattern 252a of the light control panel 200 can be arranged to overlap with the transmission area TA of the transparent display panel 100 so as to achieve high light transmittance in the light transmission mode. The guide pattern 252a of the light control panel 200 can be arranged not to overlap with the non-transmission area NTA of the transparent display panel 100. That is, as Figure 7 As shown, the guide pattern 252a of the light control panel 200 may be disposed so as not to overlap with the light emitting device E of the transparent display panel 100. In addition, the guide pattern 252a of the light control panel 200 may be disposed so as not to overlap with the transistor T of the transparent display panel 100. In addition, the guide pattern 252a of the light control panel 200 may be disposed so as not to overlap with the color filter CF and the black matrix BM of the transparent display panel 100.

[0102] As an example, in the light control panel 200 according to an embodiment of the present disclosure, one transmission area TA of the transparent display panel 100 may overlap with one guide pattern 252a, but is not limited thereto. Alternatively, one transmission area TA of the transparent display panel 100 may overlap with a plurality of guide patterns 252a, which will be described in detail below.

[0103] The guide pattern 252a may extend in one direction. In one embodiment, the guide pattern 252a may extend in a first direction (eg, a Y-axis direction). Fig. 9 As shown, but not limited thereto. The groove 252c may extend in a first direction parallel to the guide pattern 252a, but not limited thereto. For example, the guide pattern 252a may extend parallel to the first signal line SL1. The guide pattern 252a is arranged to overlap with the transmission area TA of the transparent display panel 100 and may have a first width W1. The first width W1 may be equal to or greater than the width of the transmission area TA of the transparent display panel 100 in the first direction (e.g., the Y-axis direction). In this case, the light control panel 200 according to an embodiment of the present disclosure may include only one guide pattern 252a between two adjacent spacers 252b.

[0104] exist Fig. 9 In the embodiment, the guide pattern 252a is illustrated to extend in the first direction (eg, the Y-axis direction), but is not necessarily limited thereto. The extending direction of the guide pattern 252a may vary according to the shape of the transmission area TA in the transparent display panel 100. Figure 3As shown, the transparent display panel 100 may include a transmissive area TA disposed on a line along a first direction (eg, a Y-axis direction). In this case, the guide pattern 252a may extend in the first direction (eg, the Y-axis direction), as shown in FIG. Fig. 9 shown.

[0105] However, with Figure 3 Unlike the example shown, the transparent display panel 100 may include the transmission areas TA disposed on a line along the second direction (eg, the X-axis direction). In this case, the guide pattern 252a may extend in the second direction (eg, the X-axis direction).

[0106] The spacer 252b may be disposed between the first electrode 230 and the second electrode 240 to maintain a gap between the first electrode 230 and the second electrode 240. The spacer 252b may be disposed between the guide patterns 252a adjacently arranged on a plane.

[0107] The groove 252c may be provided on at least one side of the spacer 252b. For example, the groove 252c may be provided on one side of the spacer 252b, or the spacer 252b may be provided between two grooves 252c. The groove 252c may be provided on one side of the spacer 252b facing the guide pattern 252a. At this time, the spacer 252b may be spaced apart from the guide pattern 252a, with the groove 252c interposed therebetween. For example, the spacer 252b may be provided between two guide patterns 252a. One groove 252c may be provided on one side of the spacer 252b facing one guide pattern 252a, and the spacer 252b may be spaced apart from one guide pattern 252a, with one groove 252c interposed therebetween. In addition, another groove 252c may be provided on the other side of the spacer 252b facing another guide pattern 252a, and the spacer 252b may be spaced apart from another guide pattern 252a, with another groove 252c interposed therebetween. The spacer 252b may be disposed between the two grooves 252c.

[0108] The spacer 252b may be disposed to overlap the non-transmission area NTA of the transparent display panel 100. The spacer 252b may extend in one direction in the area overlapping the non-transmission area NTA of the transparent display panel 100. In one embodiment, the spacer 252b may extend in a first direction (eg, a Y-axis direction), such as Fig. 9As shown, but not limited to this. For example, the spacer 252b may extend parallel to the first signal line SL. The spacer 252b may have a second width W2 and extend in parallel to the guide pattern 252a in the first direction (e.g., the Y-axis direction), and may be disposed between the two grooves 252c. The groove 252c may extend in the first direction parallel to the guide pattern 252a, but not limited to this. The second width W2 may be smaller than the first width W1 of the guide pattern 252a and smaller than the width of the non-transmission area NTA of the transparent display panel 100 in the first direction (e.g., the Y-axis direction), but not limited to this.

[0109] exist Fig. 9 In the embodiment, the spacer 252b is illustrated to extend in the first direction (eg, the Y-axis direction), but is not necessarily limited thereto. The direction in which the spacer 252b extends may vary depending on the shape of the non-transmission area NTA in the transparent display panel 100. Figure 3 As shown, the transparent display panel 100 may have a non-transmission area NTA disposed on a line along a first direction (eg, Y-axis direction). In this case, the spacer 252b may extend in the first direction (eg, Y-axis direction) as shown in FIG. Fig. 9 shown.

[0110] However, in the transparent display panel 100, Figure 3 Unlike the example shown, the non-transmission area NTA may be disposed on a line along the second direction (eg, the X-axis direction). In this case, the spacer 252b may extend in the second direction (eg, the X-axis direction).

[0111] The groove 252c may be disposed between the guide pattern 252a and the spacer 252b. The groove 252c may be formed concavely toward the first electrode 230, and may gather light-shielding particles 254b included in the second dielectric 254 in a light-transmitting mode. Specifically, when a voltage is applied to the first electrode 230 and the second electrode 240, a plurality of light-shielding particles 254b included in the second dielectric 254 may move to the groove 252c along the electric field direction.

[0112] The groove 252c may be disposed to overlap the non-transmission area NTA of the transparent display panel 100. Figure 7As shown, at least a portion of the groove 252c of the light control panel 200 may be arranged to overlap with the light emitting device E of the transparent display panel 100. In addition, at least a portion of the groove 252c of the light control panel 200 may be arranged to overlap with the transistor T of the transparent display panel 100. In addition, at least a portion of the groove 252c of the light control panel 200 may be arranged to overlap with the color filter CF and the black matrix BM of the transparent display panel 100. However, the present application is not limited thereto. In addition, the spacer 252b disposed between the grooves 252c is arranged to overlap with the non-transmission area NTA of the transparent display panel 100.

[0113] The plurality of light-shielding particles 254b may be moved by an electric field generated between the first electrode 230 and the second electrode 240. When a voltage is applied to the first electrode 230 and the second electrode 240, the plurality of light-shielding particles 254b may move into the groove 252c along the direction of the electric field. At this time, the plurality of light-shielding particles 254b may block the region where the groove 252c is provided from transmitting external light. For this reason, when the region where the groove 252c is provided overlaps with the transmission area TA of the transparent display panel 100, in the light transmission mode, due to the plurality of light-shielding particles 254b gathered in the groove 252c of the first dielectric 252 included in the light control panel 200, the light transmittance of the transparent display device 10 may be reduced. Thus, the light control panel 200 according to an embodiment of the present disclosure may prevent the groove 252c from overlapping with the transmission area TA of the transparent display panel 100. In the light control panel 200 according to an embodiment of the present disclosure, the grooves 252c and the spacers 252b arranged between the grooves 252c are arranged to overlap with the non-transmission area NTA of the transparent display panel 100. Therefore, in the light transmission mode, the transmittance reduction caused by the light-shielding particles 254b gathered in the grooves 252c can be prevented.

[0114] The groove 252c may extend in one direction. In one embodiment, the groove 252c may extend in a first direction (eg, the Y-axis direction). Fig. 9 As shown. For example, the groove 252c may extend parallel to the first signal line SL1. The groove 252c may have a third width W3 and extend parallel to the guide pattern 252a and the spacer 252b in the first direction (e.g., the Y-axis direction) and may be disposed between the guide pattern 252a and the spacer 252b. The third width W3 may be smaller than the first width W1 of the guide pattern 252a and smaller than the width of the non-transmission area NTA of the transparent display panel 100 in the first direction (e.g., the Y-axis direction), but is not limited thereto.

[0115] More specifically, the fourth width W4 of the area where the groove 252c and the spacer 252b are provided may be smaller than the width of the non-transmission area NTA of the transparent display panel 100 in the first direction (e.g., the Y-axis direction), but is not limited thereto. For example, when two grooves 252c are adjacently provided with the spacer 252b therebetween, the fourth width W4, which is the sum of the width W3 of each of the two grooves 252c and the width W2 of the spacer 252b, may be smaller than the width of the non-transmission area NTA of the transparent display panel 100 in the first direction (e.g., the Y-axis direction). Thus, the light control panel 200 according to the embodiment of the present disclosure can prevent the groove 252c from overlapping the transmission area TA of the transparent display panel 100, and further, the groove 252c and the spacer 252b provided between the grooves 252c are provided to overlap the non-transmission area NTA of the transparent display panel 100, so that in the light transmission mode, the light transmittance of the transparent display device 10 can be prevented from being reduced due to the light shielding particles 254b gathered in the groove 252c.

[0116] exist Fig. 9 In the embodiment, the groove 252c is illustrated to extend in the first direction (eg, the Y-axis direction), but is not necessarily limited thereto. The extending direction of the groove 252c may vary according to the shape of the non-transmission area NTA in the transparent display panel 100. Figure 3 As shown, the transparent display panel 100 may include a non-transmission area NTA disposed on a line along a first direction (eg, a Y-axis direction). In this case, the groove 252c may extend in the first direction (eg, the Y-axis direction), such as Fig. 9 shown.

[0117] However, in the transparent display panel 100, Figure 3 Unlike the example shown, the non-transmission area NTA may be disposed on a line along the second direction (eg, the X-axis direction). In this case, the groove 252c may extend in the second direction (eg, the X-axis direction).

[0118] In one embodiment, the guide pattern 252a, the spacer 252b and the groove 252c included in the first dielectric 252 may be formed as one body, but is not limited thereto. The guide pattern 252a, the spacer 252b and the groove 252c included in the first dielectric 252 may be made of the same first dielectric material, but is not limited thereto. The guide pattern 252a, the spacer 252b and the groove 252c included in the first dielectric 252 may be formed simultaneously by an embossing process, but is not limited thereto. Alternatively, the guide pattern 252a, the spacer 252b and the groove 252c included in the first dielectric 252 may be formed by different processes. The light control panel 200 according to the embodiment of the present disclosure forms the guide pattern 252a, the spacer 252b and the groove 252c simultaneously by an embossing process, thereby reducing the manufacturing process cost and the manufacturing process time due to the simplification of the manufacturing process, and further reducing the production energy. Furthermore, the light control panel 200 according to the embodiment of the present disclosure can reduce the manufacturing process and can reduce the generation of greenhouse gas due to the manufacturing process, thereby improving ESG (Environment / Society / Governance) quality.

[0119] Each of the guide pattern 252a, the spacer 252b, and the groove 252c may be stamped to have different thicknesses on one surface of the first electrode 230. The guide pattern 252a may have a first thickness T1, and the spacer 252b may have a second thickness T2 greater than the first thickness T1, but is not limited thereto. At this time, the second thickness T2 may correspond to the spacing distance between the first electrode 230 and the second electrode 240. The groove 252c is disposed between the guide pattern 252a and the spacer 252b, and the area where the groove 252c is disposed may have a third thickness T3. The third thickness T3 may be less than the first thickness T1 of the guide pattern 252a, but may be greater than 0, but is not limited thereto. That is, the first dielectric 252 may be formed to have a predetermined third thickness T3 without exposing the first electrode 230 in the area where the groove 252c is formed.

[0120] Since the light control panel 200 according to an embodiment of the present disclosure includes a first dielectric 252 having a predetermined thickness in the area where the groove 252c is formed, when a voltage is applied to the first electrode 230 and the second electrode 240, the impact applied when the light-shielding particles 254b gather in the groove 252c can be reduced, thereby preventing the light-shielding particles 254b from being damaged.

[0121] The second dielectric 254 may be disposed on a side of the second electrode 240 facing the first electrode 230. Figures 6 to 8As shown, the second dielectric 254 may include a solvent 254 a and a plurality of light-shielding particles 254 b distributed in the solvent 254 a , and the solvent 254 a includes a second dielectric material having a second dielectric constant, but is not limited thereto.

[0122] The solvent 254a is disposed on the first dielectric 252 and may fill a space formed by the step difference between the guide pattern 252a, the spacer 252b, and the groove 252c. The solvent 254a may be made of a second dielectric material having a second dielectric constant. The second dielectric constant may be different from the first dielectric constant of the first dielectric material included in the first dielectric 252. In one embodiment, the second dielectric constant may be less than the first dielectric constant.

[0123] In addition, the greater the difference between the first dielectric constant and the second dielectric constant, the easier it is for the light-shielding particles 254b to move into the groove 252c of the first dielectric 252 in the light-transmitting mode. Specifically, in the light control panel 200, a voltage may be applied to the first electrode 230 and the second electrode 240 in the light-transmitting mode, and dielectric polarization may occur in the solvent 254a of the first dielectric 252 and the second dielectric 254. The greater the difference between the first dielectric constant and the second dielectric constant, the greater the difference in dielectric polarization density at the interface between the solvent 254a of the first dielectric 252 and the second dielectric 254. Due to the convex shape of the guide pattern 252a, an electric field is generated in a direction inclined toward the groove 252c, and the greater the difference in dielectric polarization density at the interface between the solvent 254a of the first dielectric 252 and the second dielectric 254, the greater the inclination of the electric field direction. Therefore, when switching from the light-blocking mode to the light-transmitting mode, a plurality of light-shielding particles 254b may be better moved into the groove 252c of the first dielectric 252. Therefore, in the light control panel 200 according to the embodiment of the present disclosure, the plurality of light-shielding particles 254 b may be better moved into the grooves 252 c of the first dielectric 252 , and high light transmittance may be achieved in the light transmission mode.

[0124] In addition, the greater the difference between the first dielectric constant and the second dielectric constant, the easier it is for the light-shielding particles 254b to move into the grooves 252c of the first dielectric 252 in the light-transmitting mode. In one embodiment, the difference between the first dielectric constant and the second dielectric constant may be 15 or more, but is not limited thereto. By ensuring that the difference in dielectric constant between the first dielectric 252 and the solvent 254a of the second dielectric 254 is greater than or equal to 15, the light control panel 200 may allow the plurality of light-shielding particles 254b to fully move into the grooves 252c of the first dielectric 252 in the light-transmitting mode. The light control panel 200 may increase the light transmittance in the light-transmitting mode.

[0125] In one embodiment, the top surface of the first dielectric 252 may be subjected to plasma treatment to have hydrophilicity. The first dielectric 252 may be in direct contact with the solvent 254a of the second dielectric 254 on its top surface. As the dielectric constant difference between the first dielectric 252 and the solvent 254a of the second dielectric 254 increases, the adhesion between the first dielectric 252 and the solvent 254a of the second dielectric 254 may decrease. The reduction in adhesion between the first dielectric 252 and the second dielectric 254 may increase the possibility of the second dielectric 254 being separated from the first dielectric 252. In order to prevent this, the first dielectric 252 may be plasma treated so that the top surface of the first dielectric 252 in contact with the solvent 254a of the second dielectric 254 changes from hydrophobic to hydrophilic. Thus, the adhesion between the first dielectric 252 and the second dielectric 254 having a large dielectric constant difference can be improved, and the second dielectric 254 can be prevented from peeling off from the first dielectric 252. Specifically, the solvent 254 a of the second dielectric 254 may be prevented from being peeled off from the first dielectric 252 .

[0126] The plurality of light-shielding particles 254b may be negatively or positively charged and distributed in the solvent 254a, and may block light incident from the outside. The plurality of light-shielding particles 254b may be an electrophoretic material, such as carbon particles, but is not limited thereto.

[0127] The distribution area of ​​the plurality of light-shielding particles 254b may vary depending on whether a voltage is applied to the first electrode 230 and the second electrode 240. When no voltage is applied to the first electrode 230 and the second electrode 240, the plurality of light-shielding particles 254b may be uniformly dispersed in the solvent 254a, such as Figure 6 As shown. Since the plurality of light-shielding particles 254b are distributed over the entire region where the solvent 254a is disposed, the light-blocking mode can be realized by blocking external light with the plurality of light-shielding particles 254b over the entire region. External light does not penetrate the light control panel 200 and cannot enter the transmission area TA and the non-transmission area NTA of the transparent display panel 100, thereby realizing the light-blocking mode.

[0128] On the other hand, when a voltage is applied to the first electrode 230 and the second electrode 240, as shown in FIG. Figure 8As shown, a plurality of light-shielding particles 254b may be gathered in the groove 252c of the first dielectric 252 along the direction of the electric field. The groove 252c may be arranged to overlap with the non-transmission area NTA of the transparent display panel 100, but is not limited thereto. The plurality of light-shielding particles 254b may be distributed only in the area where the groove 252c is formed, and may not be distributed in the area where the groove 252c is not formed. External light may be transmitted in the area other than the groove 252c, thereby realizing a light-transmitting mode. The light passing through the light control panel 200 may penetrate the transparent display panel 100 through the transmission area TA of the transparent display panel 100. Thus, a user located on the front surface of the transparent display device 10 can see an object located on the rear surface of the transparent display device 10.

[0129] The adhesive layer 260 is disposed between the second electrode 240 and the dielectric layer 250 to adhere the dielectric layer 250 to the second electrode 240. The adhesive layer 260 may be a transparent adhesive film such as optically clear adhesive OCA or a transparent adhesive such as optically clear resin OCR, but is not limited thereto.

[0130] The light control panel 200 according to the embodiment of the present disclosure can realize the light blocking mode and the light transmission mode by using the electrophoretic element. Thus, the light control panel 200 according to the embodiment of the present disclosure can realize the transparent display device 10 that allows the user to see the object located on the rear surface of the transparent display device 10 in the light transmission mode. At the same time, the light control panel 200 according to the embodiment of the present disclosure can enable the transparent display device 10 to display an image with high contrast in the light blocking mode.

[0131] In addition, the light control panel 200 according to the embodiment of the present disclosure may include each of the first electrode 230 and the second electrode 240 as an integral electrode, thereby reducing the processing cost of the electrode and simplifying the driving circuit. In addition, in the light control panel 200 according to the embodiment of the present disclosure, the edge of the electrode is not set in the display area DA of the transparent display panel 100, and therefore, the plurality of light shielding particles 254b can be prevented from gathering in the area overlapping with the display area DA of the transparent display panel 100.

[0132] In addition, in the light control panel 200 according to the embodiment of the present disclosure, the top surface of the guide pattern 252a of the first dielectric 252 can be formed to have a convex curved surface facing the second electrode 240 between the two grooves 252c. Thus, in the light control panel 200 according to the embodiment of the present disclosure, when a voltage is applied to the first electrode 230 and the second electrode 240, the plurality of light-shielding particles 254b can move into the groove 252c and can not remain on the top surface of the guide pattern 252a. The light control panel 200 according to the embodiment of the present disclosure can improve the light transmittance in the light transmission mode.

[0133] Furthermore, in the light control panel 200 according to the embodiment of the present disclosure, the top surface of the guide pattern 252a is gently inclined, thereby preventing the occurrence of a double image.

[0134] Furthermore, in the light control panel 200 according to an embodiment of the present disclosure, the guide pattern 252a of the first dielectric 252 may be disposed to overlap the transmission area TA of the transparent display panel 100, thereby achieving high light transmittance in the light transmission mode.

[0135] In addition, in the light control panel 200 according to an embodiment of the present disclosure, the groove 252c of the first dielectric 252 can be set to overlap with the non-transmission area NTA of the transparent display panel 100, thereby preventing the transmittance from being reduced in the light-transmitting mode due to the light-shielding particles 254b gathered in the groove 252c of the first dielectric 252.

[0136] In addition, in the light control panel 200 according to an embodiment of the present disclosure, the first dielectric 252 can be formed to have a predetermined thickness in the area where the groove 252c is formed, so that the impact applied when the light-shielding particles 254b gather in the groove 252c can be reduced, thereby preventing the light-shielding particles 254b from being damaged.

[0137] In addition, in the light control panel 200 according to the embodiment of the present disclosure, the guide pattern 252a, the spacer 252b and the groove 252c can be formed simultaneously by the embossing process. Thus, the light control panel 200 according to the embodiment of the present disclosure can reduce the manufacturing process cost and the manufacturing process time due to the simplification of the manufacturing process, and further reduce the production energy. In addition, the light control panel 200 according to the embodiment of the present disclosure can reduce the manufacturing process, and can reduce the generation of greenhouse gases caused by the manufacturing process, thereby improving the ESG (environment / social / governance) quality.

[0138] Furthermore, in the light control panel 200 according to an embodiment of the present disclosure, the difference in dielectric constant between the first dielectric 252 and the second dielectric 254 may be large so that the plurality of light-shielding particles 254 b may fully move into the grooves 252 c of the first dielectric 252 .

[0139] Furthermore, in the light control panel 200 according to the embodiment of the present disclosure, by ensuring that the difference in dielectric constant between the first dielectric 252 and the solvent 254a of the second dielectric 254 is greater than or equal to 15, the light control panel 200 can allow the plurality of light-shielding particles 254b to completely move into the grooves 252c of the first dielectric 252 in the light transmission mode. The light control panel 200 can increase the light transmittance in the light transmission mode.

[0140] like Figures 6 to 9As shown, the light control panel 200 according to an embodiment of the present disclosure may have a guide pattern 252a of the first dielectric 252 aligned with the transmission area TA of the transparent display panel 100 and a groove 252c of the first dielectric 252 aligned with the non-transmission area NTA of the transparent display panel 100. In addition, the light control panel 200 according to an embodiment of the present disclosure may have a spacer 252b disposed to overlap with the non-transmission area NTA of the transparent display panel 100. However, it is not necessarily limited thereto.

[0141] The light control panel 200 may be implemented as a film type having flexibility. However, it is not necessarily limited thereto. A precise process may be required to align the film type light control panel 200 and the transparent display panel 100 as described above. In order to facilitate the process, the structure of the first dielectric 252 may be modified so that the light control panel 200 according to another exemplary embodiment of the present disclosure may be disposed on the transparent display panel 100 regardless of the position of the transmission area TA and the non-transmission area NTA of the transparent display panel 100. In the following, reference will be made to Figures 10 to 13 The light control panel 200 according to another example embodiment of the present disclosure is described in more detail.

[0142] Fig.10 It is in light blocking mode. Figure 5 A cross-sectional view of another example of one side of Fig.11 It is shown in the light transmission mode Figure 5 A cross-sectional view of another example of one side of Fig.12 is a plan view showing another example of a spacer, a guide pattern, and a groove, Fig.13 is a plan view illustrating another example of a spacer, a guide pattern, and a groove.

[0143] Reference Figures 10 to 13 , a light control panel 200 according to another example embodiment of the present disclosure includes a first substrate 210 , a second substrate 220 , a first electrode 230 and a second electrode 240 , a dielectric layer 250 , and an adhesive layer 260 , but is not limited thereto.

[0144] According to another exemplary embodiment of the present disclosure, a light control panel 200 and Figures 6 to 9 The light control panel 200 according to the embodiment of the present disclosure shown differs only in the dielectric layer 250, and the other components are substantially the same. Hereinafter, the differences will be mainly described, and the description of substantially the same components will be omitted or briefly given.

[0145] The dielectric layer 250 may be disposed between the first electrode 230 and the second electrode 240 to implement a light blocking mode or a light transmitting mode depending on whether a voltage is applied to the first electrode 230 and the second electrode 240. In addition, the adhesive layer 260 may be disposed between the second electrode 240 and the dielectric layer 250 to adhere the dielectric layer 250 to the second electrode 240. For example, when a voltage is applied to the first electrode 230 and the second electrode 240, the dielectric layer 250 may implement a light transmitting mode. On the other hand, when no voltage is applied to the first electrode 230 and the second electrode 240, the dielectric layer 250 may implement a light blocking mode.

[0146] like Fig.10 As shown, the dielectric layer 250 may include a first dielectric 252 and a second dielectric 254, but is not limited thereto. The first dielectric 252 and the second dielectric 254 may be made of different dielectric materials. The light control panel 200 according to another example embodiment of the present disclosure may control the direction of the electric field in a desired direction by utilizing the shape of the interface between the first dielectric 252 and the second dielectric 254 and the difference in dielectric constant between the first dielectric 252 and the second dielectric 254. In addition, the light control panel 200 according to another example embodiment of the present disclosure may have a structure that does not require alignment between the transmission area TA of the transparent display panel 100 and the components of the first dielectric 252.

[0147] Specifically, the first dielectric 252 may be disposed on a side of the first electrode 230 facing the second electrode 240, and may be made of a first dielectric material having a first dielectric constant. The second dielectric 254 may be disposed on a side of the second electrode 240 facing the first electrode 230. In addition, an adhesive layer 260 may be disposed between the second electrode 240 and the dielectric layer 250 to adhere the dielectric layer 250 to the second electrode 240. Fig.10 and Fig.11 As shown, the first dielectric 252 may include a guide pattern 252a, a spacer 252b, a first groove 252c, and a second groove 252d, but is not limited thereto. Fig.10 and Fig.11 As shown, the second dielectric 254 may include a solvent 254 a and a plurality of light-shielding particles 254 b .

[0148] The guide pattern 252a can guide the plurality of light-shielding particles 254b included in the second dielectric 254 to the first groove 252c or the second groove 252d. Specifically, the top surface of the guide pattern 252a can be formed to bulge toward the second electrode 240. At this time, the top surface of the guide pattern 252a can be a curved surface. In this case, when a voltage is applied to the first electrode 230 and the second electrode 240, dielectric polarization occurs in the first dielectric material of the guide pattern 252a, and the dielectric polarization density varies according to the shape of the top surface. Therefore, due to the convex shape of the guide pattern 252a, an electric field can be generated in a direction inclined toward the first groove 252c or the second groove 252d.

[0149] A plurality of light-shielding particles 254b included in the second dielectric 254 may move due to an electric field generated between the first electrode 230 and the second electrode 240. When a voltage is applied to the first electrode 230 and the second electrode 240, the plurality of light-shielding particles 254b may move to the first groove 252c or the second groove 252d along the electric field direction. Therefore, the plurality of light-shielding particles 254b cannot be disposed on an area where the guide pattern 252a is disposed, and the area where the guide pattern 252a is disposed may have a high light transmittance. Therefore, external light may be transmitted through an area where the guide pattern 252a is disposed. Light passing through the light control panel 200 may be incident on the transparent display panel 100.

[0150] When the guide pattern 252a has a flat top surface, the light transmittance of the light control panel 200 is reduced in the light transmission mode, and when the slopes of the two inclined surfaces of the guide pattern 252a are large, a double image of one object may appear as two objects to the user.

[0151] In this way, in the light control panel 200 according to another exemplary embodiment of the present disclosure, the top surface of the guide pattern 252a can be formed to have a curved surface, so that when a voltage is applied to the first electrode 230 and the second electrode 240, the direction of the electric field can be controlled to be toward the first groove 252c or the second groove 252d. Therefore, in the light control panel 200 according to another exemplary embodiment of the present disclosure, the plurality of light-shielding particles 254b can be accurately moved to the first groove 252c or the second groove 252d, and a high light transmittance can be achieved in the light transmission mode. In addition, in the light control panel 200 according to another exemplary embodiment of the present disclosure, the top surface of the guide pattern 252a is gently inclined, thereby preventing the occurrence of double images.

[0152] At least a portion of the guide pattern 252a may be arranged to overlap with the transmission area TA of the transparent display panel 100 so as to achieve high light transmittance in the light transmission mode. The guide pattern 252a may be arranged not to overlap with the non-transmission area NTA of the transparent display panel 100. In the light control panel 200 according to another exemplary embodiment of the present disclosure, in the light transmission mode, the plurality of light-shielding particles 254b may move into the first groove 252c or the second groove 252d and may not be arranged in the area where the guide pattern 252a is arranged. In the light control panel 200 according to another exemplary embodiment of the present disclosure, external light may be transmitted through the area where the plurality of light-shielding particles 254b are not arranged, that is, the area where the guide pattern 252a is arranged. Since at least a portion of the guide pattern 252a of the light control panel 200 may be arranged to overlap with the transmission area TA of the transparent display panel 100, the light passing through the light control panel 200 is incident on the transparent display panel 100 and may pass through the transparent display panel 100 through the transmission area TA of the transparent display panel 100.

[0153] In this way, external light can penetrate the transparent display device 10 through the area where the guide pattern 252a of the light control panel 200 is provided and the transmission area TA of the transparent display panel 100. In the transparent display device 10 according to another exemplary embodiment of the present disclosure, at least a portion of the guide pattern 252a of the light control panel 200 may be disposed to overlap with the transmission area TA of the transparent display panel 100, thereby achieving high light transmittance in the light transmission mode. The guide pattern 252a of the light control panel 200 may be disposed not to overlap with the non-transmission area NTA of the transparent display panel 100.

[0154] Different from Figures 6 to 9 In the light control panel 200 shown in the figure, in the light control panel 200 according to another exemplary embodiment of the present disclosure, one transmission area TA of the transparent display panel 100 may overlap with the plurality of guide patterns 252a. That is, in the light control panel 200 according to another exemplary embodiment of the present disclosure, the plurality of guide patterns 252a may be disposed in an area overlapping with one transmission area TA.

[0155] Furthermore, in the light control panel 200 according to another exemplary embodiment of the present disclosure, a plurality of guide patterns 252a may be disposed between two adjacent spacers 252b. Fig.10 and Fig.11 As shown, two guide patterns 252a may be disposed between two adjacently disposed spacers 252b, but is not necessarily limited thereto. Three or more guide patterns 252a may be disposed between two adjacent spacers 252b.

[0156] Each of the guide patterns 252a may extend in one direction. In one embodiment, the guide patterns 252a may extend parallel to each other in a first direction (eg, a Y-axis direction). Fig.12 As shown, but not limited thereto. The groove 252c may extend in a first direction parallel to each of the guide patterns 252a, but not limited thereto. For example, each of the guide patterns 252a may extend parallel to the first signal line SL1. At least a portion of each of the guide patterns 252a is disposed to overlap the transmission area TA of the transparent display panel 100, and each of the guide patterns 252a may have a first width W1. The first width W1 may be smaller than a width of the transmission area TA of the transparent display panel 100 in the first direction (e.g., the Y-axis direction).

[0157] In the light control panel 200 according to another exemplary embodiment of the present disclosure, the spacing of the guide patterns 252a may be reduced. In the light control panel 200 according to another exemplary embodiment of the present disclosure, the distance between the center of one guide pattern 252a and the center of another adjacent guide pattern 252a may be a second distance d2. The second distance d2 may be less than the width of the transmission area TA of the transparent display panel 100 in the first direction (e.g., the Y-axis direction). The second distance d2 may be less than the first distance d1. The second distance d2 may be the distance from the center of the top surface of one guide pattern 252a (or the point on the top surface having the maximum spacing distance from the first electrode 230) to the center of the top surface of another adjacent guide pattern 252a (or the point on the top surface having the maximum spacing distance from the first electrode 230). In the light control panel 200 according to another exemplary embodiment of the present disclosure, when switching from the light blocking mode to the light transmitting mode, the moving distance of the light shielding particles 254b is reduced, so that the light shielding particles 254b can be better gathered in the grooves 252c and 252d.

[0158] In addition, Fig.12 , it is illustrated that the guide pattern 252a extends in the first direction (eg, the Y-axis direction), but it is not necessarily limited thereto.

[0159] In the light control panel 200 according to another exemplary embodiment of the present disclosure, at least a portion of the guide pattern 252a may overlap with the transmission area TA of the transparent display panel 100 to achieve high light transmittance in the light transmission mode, and does not necessarily need to be aligned with the transmission area TA of the transparent display panel 100. The guide pattern 252a may be arranged not to overlap with the non-transmission area NTA of the transparent display panel 100. Therefore, in the light control panel 200 according to another exemplary embodiment of the present disclosure, the guide pattern 252a can be arranged regardless of the shape of the transmission area TA of the transparent display panel 100. In another exemplary embodiment, as Fig.13As shown, each of the guide patterns 252a may extend in the second direction (eg, the X-axis direction). For example, each of the guide patterns 252a may extend parallel to the second signal line SL2, but is not necessarily limited thereto.

[0160] The spacer 252b may be disposed between the first electrode 230 and the second electrode 240 to maintain a gap between the first electrode 230 and the second electrode 240. The spacer 252b may be disposed between the guide patterns 252a adjacently disposed on a plane.

[0161] The first groove 252c may be provided on at least one side of the spacer 252b. The first groove 252c may be provided on one side of the spacer 252b facing the guide pattern 252a. At this time, the spacer 252b may be spaced apart from the guide pattern 252a, with the first groove 252c interposed therebetween. For example, the spacer 252b may be provided between two guide patterns 252a. One first groove 252c may be provided on one side of the spacer 252b facing one guide pattern 252a, and the spacer 252b may be spaced apart from one guide pattern 252a, with one first groove 252c interposed therebetween. In addition, another first groove 252c may be provided on the other side of the spacer 252b facing another guide pattern 252a, and the spacer 252b may be spaced apart from another guide pattern 252a, with another first groove 252c interposed therebetween. The spacer 252b may be provided between two first grooves 252c.

[0162] At least a portion of the spacer 252b may be disposed to overlap the non-transmission area NTA of the transparent display panel 100. The spacer 252b may extend in one direction in an area overlapping the non-transmission area NTA of the transparent display panel 100. In one embodiment, the spacer 252b may extend in a first direction (eg, a Y-axis direction), such as Fig.12 As shown, but not limited to this. For example, the spacer 252b may extend parallel to the first signal line SL. The spacer 252b may have a second width W2 and extend in parallel to the guide pattern 252a in the first direction (e.g., the Y-axis direction), and may be disposed between the two grooves 252c. The grooves 252c and 252d may extend in the first direction parallel to the guide pattern 252a, but not limited to this. The second width W2 may be smaller than the first width W1 of the guide pattern 252a and smaller than the width of the non-transmission area NTA of the transparent display panel 100 in the first direction (e.g., the Y-axis direction), but not limited to this.

[0163] In addition, Fig.12 , it is illustrated that the spacer 252 b extends in the first direction (eg, the Y-axis direction), but is not necessarily limited thereto.

[0164] In the light control panel 200 according to another exemplary embodiment of the present disclosure, the spacer 252b does not necessarily need to be aligned with the non-transmission area NTA of the transparent display panel 100. Therefore, in the light control panel 200 according to another exemplary embodiment of the present disclosure, the spacer 252b may be provided regardless of the shape of the non-transmission area NTA of the transparent display panel 100. In another exemplary embodiment, the spacer 252b may extend in the second direction (e.g., the X-axis direction), such as Fig.13 For example, the spacer 252b may extend parallel to the second signal line SL2.

[0165] The first groove 252c may be disposed between the guide pattern 252a and the spacer 252b, and the second groove 252d may be disposed between adjacent guide patterns 252a. At least a portion of each of the first groove 252c and the second groove 252d may overlap with the transmission area TA of the transparent display panel 100, and the remaining portion may overlap with the non-transmission area NTA of the transparent display panel 100.

[0166] The first groove 252c and the second groove 252d are formed concavely toward the first electrode 230, and light-shielding particles 254b included in the second dielectric 254 may be gathered in a light-transmitting mode. The plurality of light-shielding particles 254b may be moved by an electric field generated between the first electrode 230 and the second electrode 240. When a voltage is applied to the first electrode 230 and the second electrode 240, the plurality of light-shielding particles 254b may move into the first groove 252c or the second groove 252d along the direction of the electric field.

[0167] Each of the first groove 252c and the second groove 252d may extend in one direction. In one embodiment, each of the first groove 252c and the second groove 252d may extend in a first direction (eg, the Y-axis direction). Fig.12 As shown. For example, each of the first groove 252c and the second groove 252d may extend parallel to the first signal line SL1. The first groove 252c may have a third width W3 and extend in parallel to the guide pattern 252a in the first direction (e.g., the Y-axis direction). The second groove 252d may have a fifth width W5 and may extend in parallel to the guide pattern 252a in the first direction (e.g., the Y-axis direction). Each of the third width W3 and the fifth width W5 may be smaller than the first width W1 of the guide pattern 252a, and may be smaller than the width of the non-transmission area NTA of the transparent display panel 100 in the first direction (e.g., the Y-axis direction), but is not limited thereto.

[0168] In addition, the first groove 252c and the second groove 252d may have the same width, that is, the third width W3 and the fifth width W5 may be the same, but are not necessarily limited thereto. The first groove 252c and the second groove 252d may have different widths. For example, the second groove 252d disposed between the guide patterns 252a may be formed to have a smaller width than the first groove 252c because the second groove 252d has a larger area than the first groove 252c that overlaps with the transmission area TA of the transparent display panel 100. Thus, the light control panel 200 according to another exemplary embodiment of the present disclosure can minimize the reduction in the light transmittance of the transparent display device 10 caused by the light-shielding particles 254b gathered in the second groove 252d in the light-transmitting mode.

[0169] In addition, Fig.12 In the embodiment, it is illustrated that the first groove 252c and the second groove 252d extend along the first direction (eg, the Y-axis direction), but the present invention is not necessarily limited thereto.

[0170] In the light control panel 200 according to another exemplary embodiment of the present disclosure, at least a portion of the guide pattern 252a may overlap with the transmission area TA of the transparent display panel 100 to achieve high light transmittance in the light transmission mode, and does not necessarily need to be aligned with the transmission area TA of the transparent display panel 100. Therefore, in the light control panel 200 according to another exemplary embodiment of the present disclosure, the guide pattern 252a can be provided regardless of the shape of the transmission area TA of the transparent display panel 100.

[0171] In the light control panel 200 according to another exemplary embodiment of the present disclosure, the first groove 252c and the second groove 252d do not necessarily need to be aligned with the non-transmission area NTA of the transparent display panel 100. Therefore, in the light control panel 200 according to another exemplary embodiment of the present disclosure, the first groove 252c and the second groove 252d can be provided regardless of the shape of the non-transmission area NTA of the transparent display panel 100. In another exemplary embodiment, each of the first groove 252c and the second groove 252d can extend in the second direction (e.g., the X-axis direction), such as Fig.13 For example, each of the first groove 252c and the second groove 252d may extend parallel to the second signal line SL2, but is not necessarily limited thereto.

[0172] As a result, in the light control panel 200 according to another example embodiment of the present disclosure, the guide pattern 252a, the spacer 252b, the first groove 252c and the second groove 252d included in the first dielectric 252 may be formed to extend in the first direction (eg, the Y-axis direction), as shown in FIG. Fig.12In another exemplary embodiment of the light control panel 200 according to the present disclosure, as shown, but not necessarily limited thereto. Fig.13 As shown, the guide pattern 252a, the spacer 252b, the first groove 252c and the second groove 252d included in the first dielectric 252 can be formed to extend in the second direction (e.g., the X-axis direction). In this case, the spacer 252b extending in the second direction (e.g., the X-axis direction) can prevent the plurality of light-shielding particles 254b from moving downward due to gravity. Therefore, the plurality of light-shielding particles 254b can be evenly distributed in the solvent 254a of the second dielectric 254 without gathering downward due to gravity. The light control panel 200 according to another example embodiment of the present disclosure can prevent the plurality of light-shielding particles 254b included in the second dielectric 254 from gathering to one side, and can maintain a uniform ratio of the plurality of light-shielding particles 254b, so that the light-shielding rate can be uniformly maintained in the light-blocking mode.

[0173] In one embodiment, the guide pattern 252a, the spacer 252b, the first groove 252c and the second groove 252d included in the first dielectric 252 may be formed as one body, but is not limited thereto. The guide pattern 252a, the spacer 252b, the first groove 252c and the second groove 252d included in the first dielectric 252 may be made of the same first dielectric material, but is not limited thereto. The guide pattern 252a, the spacer 252b, the first groove 252c and the second groove 252d included in the first dielectric 252 may be formed simultaneously by an imprinting process, but is not limited thereto. Alternatively, the guide pattern 252a, the spacer 252b, the first groove 252c and the second groove 252d included in the first dielectric 252 may be formed by different processes. According to another exemplary embodiment of the present disclosure, the light control panel 200 simultaneously forms the guide pattern 252a, the spacer 252b, the first groove 252c and the second groove 252d through the embossing process, thereby reducing the manufacturing process cost and the manufacturing process time due to the simplification of the manufacturing process, and further reducing the production energy. In addition, the light control panel 200 according to another exemplary embodiment of the present disclosure can reduce the manufacturing process, and can reduce the generation of greenhouse gases caused by the manufacturing process, thereby improving the ESG (environment / social / governance) quality.

[0174] Each of the guide pattern 252a, the spacer 252b, the first groove 252c, and the second groove 252d may be stamped to have different thicknesses on one surface of the first electrode 230. The guide pattern 252a may have a first thickness T1, and the spacer 252b may have a second thickness T2 greater than the first thickness T1, but is not limited thereto. At this time, the second thickness T2 may correspond to the spacing distance between the first electrode 230 and the second electrode 240. The first groove 252c is disposed between the guide pattern 252a and the spacer 252b, and the area where the first groove 252c is disposed may have a third thickness T3. The second groove 252d is disposed between the guide patterns 252a, and the area where the second groove 252d is disposed may have a fourth thickness T4. The fourth thickness T4 may be less than the first thickness T1 of the guide pattern 252a, but may be greater than 0, but is not limited thereto. That is, the first dielectric 252 may be formed to have the predetermined third and fourth thicknesses T3 and T4 without exposing the first electrode 230 in the region where the first and second grooves 252 c and 252 d are formed.

[0175] Since the light control panel 200 according to another example embodiment of the present disclosure includes a first dielectric 252 having a predetermined thickness in the area where the first groove 252c and the second groove 252d are formed, when a voltage is applied to the first electrode 230 and the second electrode 240, the impact applied when the light-shielding particles 254b gather in the grooves 252c and 252d can be reduced, thereby preventing the light-shielding particles 254b from being damaged.

[0176] The second dielectric 254 may be disposed on a side of the second electrode 240 facing the first electrode 230. Fig.10 As shown, the second dielectric 254 may include a solvent 254 a and a plurality of light-shielding particles 254 b distributed in the solvent 254 a , and the solvent 254 a includes a second dielectric material having a second dielectric constant, but is not limited thereto.

[0177] The solvent 254a is disposed on the first dielectric 252 and can fill the space formed by the step difference among the guide pattern 252a, the spacer 252b, the first groove 252c and the second groove 252d. The solvent 254a may be made of a second dielectric material having a second dielectric constant. The second dielectric constant may be different from the first dielectric constant of the first dielectric material included in the first dielectric 252. In one embodiment, the second dielectric constant may be less than the first dielectric constant.

[0178] In addition, the greater the difference between the first dielectric constant and the second dielectric constant, the easier it is for the light-shielding particles 254b to move into the grooves 252c and 252d of the first dielectric 252 in the light-transmitting mode. In one embodiment, the difference between the first dielectric constant and the second dielectric constant may be 15 or more, but is not limited thereto. By ensuring that the difference in dielectric constant between the first dielectric 252 and the solvent 254a of the second dielectric 254 is greater than or equal to 15, the light control panel 200 may allow the plurality of light-shielding particles 254b to fully move into the grooves 252c and 252d of the first dielectric 252 in the light-transmitting mode. The light control panel 200 may increase the light transmittance in the light-transmitting mode.

[0179] In one embodiment, the top surface of the first dielectric 252 may be subjected to plasma treatment to have hydrophilicity. The first dielectric 252 may be subjected to plasma treatment so that the top surface of the first dielectric 252 in contact with the solvent 254a of the second dielectric 254 changes from hydrophobic to hydrophilic. Thus, the adhesion between the first dielectric 252 and the second dielectric 254 having a large dielectric constant difference may be improved, and the second dielectric 254 may be prevented from being peeled off from the first dielectric 252. Specifically, the solvent 254a of the second dielectric 254 may be prevented from being peeled off from the first dielectric 252.

[0180] The plurality of light-shielding particles 254b may be negatively or positively charged and distributed in the solvent 254a, and may block light incident from the outside. The plurality of light-shielding particles 254b may be an electrophoretic material, such as carbon particles, but is not limited thereto.

[0181] The distribution area of ​​the plurality of light-shielding particles 254b may vary depending on whether a voltage is applied to the first electrode 230 and the second electrode 240. When no voltage is applied to the first electrode 230 and the second electrode 240, the plurality of light-shielding particles 254b may be uniformly dispersed in the solvent 254a, such as Fig.10 As shown. Since the plurality of light-shielding particles 254b are distributed over the entire region where the solvent 254a is disposed, the light-blocking mode can be realized by blocking external light with the plurality of light-shielding particles 254b over the entire region. External light does not penetrate the light control panel 200 and cannot enter the transmission area TA and the non-transmission area NTA of the transparent display panel 100, thereby realizing the light-blocking mode.

[0182] On the other hand, when a voltage is applied to the first electrode 230 and the second electrode 240, as shown in FIG. Fig.11As shown, a plurality of light-shielding particles 254b may be gathered in the grooves 252c and 252d of the first dielectric 252 along the direction of the electric field. The groove 252c may be arranged to overlap with the non-transmission area NTA of the transparent display panel 100, and the groove 252d may be arranged to overlap with the transmission area TA of the transparent display panel 100, but is not limited thereto. The plurality of light-shielding particles 254b may be distributed only in the area where the grooves 252c and 252d are formed, and may not be distributed in the area where the grooves 252c and 252d are not formed. External light may be transmitted in the area other than the grooves 252c and 252d, thereby realizing the light-transmitting mode. The light passing through the light control panel 200 may penetrate the transparent display panel 100 through the transmission area TA of the transparent display panel 100. Thus, a user located on the front surface of the transparent display device 10 can see an object located on the rear surface of the transparent display device 10.

[0183] The light control panel 200 according to another exemplary embodiment of the present disclosure may use an electrophoretic element to implement a light blocking mode and a light transmission mode. Thus, the light control panel 200 according to another exemplary embodiment of the present disclosure may implement a transparent display device 10 that allows a user to see an object located on the rear surface of the transparent display device 10 in the light transmission mode. At the same time, the light control panel 200 according to another exemplary embodiment of the present disclosure may enable the transparent display device 10 to display an image with a high contrast in the light blocking mode.

[0184] In addition, the light control panel 200 according to another exemplary embodiment of the present disclosure may include each of the first electrode 230 and the second electrode 240 as an integral electrode, thereby reducing the processing cost of the electrodes and simplifying the driving circuit. In addition, in the light control panel 200 according to another exemplary embodiment of the present disclosure, the edge of the electrode is not disposed in the display area DA of the transparent display panel 100, and therefore, the plurality of light shielding particles 254b can be prevented from gathering in the area overlapping the display area DA of the transparent display panel 100.

[0185] In addition, in the light control panel 200 according to another exemplary embodiment of the present disclosure, the top surface of the guide pattern 252a of the first dielectric 252 may be formed to have a convex curved surface facing the second electrode 240 between the two grooves 252c and 252d. Thus, in the light control panel 200 according to another exemplary embodiment of the present disclosure, when a voltage is applied to the first electrode 230 and the second electrode 240, the plurality of light shielding particles 254b may move into the grooves 252c and 252d and may not remain on the top surface of the guide pattern 252a. The light control panel 200 according to another exemplary embodiment of the present disclosure may improve light transmittance in the light transmission mode.

[0186] Furthermore, in the light control panel 200 according to another exemplary embodiment of the present disclosure, the top surface of the guide pattern 252 a is gently inclined, thereby preventing the occurrence of a double image.

[0187] Furthermore, in the light control panel 200 according to another example embodiment of the present disclosure, at least a portion of the guide pattern 252a of the first dielectric 252 may be disposed to overlap the transmission area TA of the transparent display panel 100, thereby achieving high light transmittance in the light transmission mode.

[0188] In addition, in a light control panel 200 according to another example embodiment of the present disclosure, at least a portion of each of the grooves 252c and 252d of the first dielectric 252 can be set to overlap with the non-transmission area NTA of the transparent display panel 100, thereby preventing the transmittance from being reduced in the light transmission mode due to the light-shielding particles 254b gathered in the grooves 252c and 252d of the first dielectric 252.

[0189] In addition, in the light control panel 200 according to another exemplary embodiment of the present disclosure, the width of the guide pattern 252a can be reduced, and the second groove 252d can be provided between the guide patterns 252a. Since the light control panel 200 according to another exemplary embodiment of the present disclosure includes the second groove 252d, the amount of light-shielding particles 254b gathered in the first groove 252c provided between the guide pattern 252a and the spacer 252b can be reduced, so that the width of the first groove 252c can be reduced. Therefore, the light control panel 200 according to another exemplary embodiment of the present disclosure can more easily align the first groove 252c within the non-transmission area NTA of the transparent display panel 100. That is, even if a slight process error occurs, the light control panel 200 according to another exemplary embodiment of the present disclosure can align the first groove 252c within the non-transmission area NTA of the transparent display panel 100.

[0190] In the light control panel 200 according to another example embodiment of the present disclosure, due to process errors, the first groove 252c cannot be completely aligned within the non-transmission area NTA of the transparent display panel 100. However, even in this case, in the light control panel 200 according to another example embodiment of the present disclosure, the light shielding particles 254b are dispersed in the second groove 252d, thereby preventing the transmittance from being greatly reduced only in some areas in the light transmission mode and achieving uniform transmittance.

[0191] In addition, in a light control panel 200 according to another example embodiment of the present disclosure, the first dielectric 252 can be formed to have a predetermined thickness in the area where the grooves 252c and 252d are formed, so that the impact applied when the light-shielding particles 254b gather in the grooves 252c and 252d can be reduced, thereby preventing the light-shielding particles 254b from being damaged.

[0192] In addition, in the light control panel 200 according to another example embodiment of the present disclosure, the guide pattern 252a, the spacer 252b, the first groove 252c and the second groove 252d can be formed simultaneously by an embossing process. Thus, the light control panel 200 according to the embodiment of the present disclosure can reduce the manufacturing process cost and the manufacturing process time due to the simplification of the manufacturing process, and further reduce the production energy. In addition, the light control panel 200 according to another example embodiment of the present disclosure can reduce the manufacturing process, and can reduce the generation of greenhouse gases caused by the manufacturing process, thereby improving the ESG (environment / social / governance) quality.

[0193] Additionally, in the light control panel 200 according to another example embodiment of the present disclosure, the difference in dielectric constant between the first dielectric 252 and the second dielectric 254 may be large so that the plurality of light-shielding particles 254 b may fully move into the grooves 252 c and 252 d of the first dielectric 252 .

[0194] In addition, in the light control panel 200 according to another exemplary embodiment of the present disclosure, the light control panel 200 can allow the plurality of light-shielding particles 254b to completely move into the grooves 252c and 252d of the first dielectric 252 in the light transmission mode by ensuring that the difference in dielectric constant between the first dielectric 252 and the solvent 254a of the second dielectric 254 is greater than or equal to 15. The light control panel 200 can increase the light transmittance in the light transmission mode.

[0195] Fig.14 : is a graph showing the difference in the direction of the electric field according to the shape of the guide pattern of the first dielectric.

[0196] refer to Fig.14 , when the top surface of the guide pattern 252a of the first dielectric 252 is flat, when a voltage is applied to the first electrode 230 and the second electrode 240, an electric field may occur in a direction perpendicular to the first electrode 230, as in region A. Since the plurality of light-shielding particles 254b move in a direction perpendicular to the first electrode 230 along the electric field direction, the plurality of light-shielding particles 254b move into the grooves 252c in a region where the grooves 252c are formed, and some of the plurality of light-shielding particles 254b are distributed on the top surface of the guide pattern 252a.

[0197] On the other hand, in the light control panel 200 according to the present disclosure, the top surface of the guide pattern 252a of the first dielectric 252 is a curved surface like a lens. Fig.14 , when the top surface of the guide pattern 252a of the first dielectric 252 is a curved surface (or lens), when a voltage is applied to the first electrode 230 and the second electrode 240, due to the convex shape of the guide pattern 252a, an electric field can appear in a direction inclined toward the groove 252c, as in region B. A plurality of light-shielding particles 254b can move into the groove 252c along the electric field direction. Therefore, when the top surface of the guide pattern 252a is a curved surface (or lens) as in the present disclosure, a higher light transmittance can be achieved in the light transmission mode compared to the case where the top surface of the guide pattern 252a is a flat surface. In addition, the top surface of the guide pattern 252a is gently inclined, thereby preventing the occurrence of double images.

[0198] Fig.15 is a graph showing a difference in the direction of an electric field according to a difference between the dielectric constant of a first dielectric and the dielectric constant of a second dielectric.

[0199] The dielectric constant difference between the first dielectric 252 and the solvent 254a of the second dielectric 254 may be less than 15. Fig.15 , for example, in the case where the dielectric constant difference between the first dielectric 252 and the solvent 254a of the second dielectric 254 is 4.4, when a voltage is applied to the first electrode 230 and the second electrode 240, an electric field may be generated in a direction perpendicular to the first electrode 230, as in region A. Since the plurality of light-shielding particles 254b move in a direction perpendicular to the first electrode 230 along the electric field direction, the plurality of light-shielding particles 254b move into the grooves 252c in a region where the grooves 252c are formed, and some of the plurality of light-shielding particles 254b are distributed on the upper surface of the guide pattern 252a.

[0200] On the other hand, in the light control panel 200 according to the present disclosure, the dielectric constant difference between the first dielectric 252 and the solvent 254a of the second dielectric 254 may be equal to or greater than 15. Fig.15For example, when the dielectric constant difference between the first dielectric 252 and the solvent 254a of the second dielectric 254 is 33, when a voltage is applied to the first electrode 230 and the second electrode 240, due to the convex shape of the guide pattern 252a, an electric field can be generated in a direction inclined toward the groove 252c, as in region B. A plurality of light-shielding particles 254b can move into the groove 252c along the electric field direction. Therefore, as in the present disclosure, when the dielectric constant difference between the first dielectric 252 and the solvent 254a of the second dielectric 254 is equal to or greater than 15, a high light transmittance can be achieved in the light-transmitting mode compared to the case where the dielectric constant difference is small. That is, the greater the difference between the first dielectric constant and the second dielectric constant, the easier it is for the light-shielding particles 254b to move into the groove 252c of the first dielectric 252 in the light-transmitting mode.

[0201] In the present disclosure, since electrophoretic elements can be used to implement a light blocking mode and a light transmitting mode, the transparent display device can allow a user to see an object located on the rear surface of the transparent display in the light transmitting mode, and the transparent display device can provide an image with high contrast in the light blocking mode.

[0202] Furthermore, in the present disclosure, each electrode in the light control panel is provided as an integral electrode, thereby reducing the processing cost of the electrode and simplifying the driving circuit.

[0203] Furthermore, in the present disclosure, since the edge of the electrode is not disposed in the display area of ​​the transparent display panel, a plurality of light-shielding particles may be prevented from being aggregated in the area overlapping the display area of ​​the transparent display panel.

[0204] Furthermore, in the present disclosure, since the upper surface of the guide pattern of the first dielectric has a convex surface, in the light transmission mode, a plurality of light shielding particles move into the grooves and do not remain on the upper surface of the guide pattern, thereby increasing the transmittance in the light transmission mode.

[0205] Furthermore, in the present disclosure, the guide pattern of the first dielectric may be disposed to overlap with the transmission region of the transparent display panel, thereby obtaining high light transmittance when the transparent display device operates in the light transmission mode.

[0206] In addition, in the present disclosure, the groove of the first dielectric can be set to overlap with the non-transmission area of ​​the transparent display panel, thereby preventing the transmittance of the transparent display device from being reduced due to the light-shielding particles gathered in the groove of the first dielectric when the transparent display device operates in the light-transmitting mode.

[0207] Furthermore, in the present disclosure, since the first dielectric may be formed to have a predetermined thickness in the region where the groove is formed, impact applied when light-shielding particles gather in the groove may be mitigated, thereby preventing the light-shielding particles from being damaged.

[0208] Furthermore, in the present disclosure, the guide pattern, the spacer, and the groove may be simultaneously formed through an imprint process, thereby reducing the manufacturing process cost and the manufacturing process time due to the simplification of the manufacturing process, and further reducing the production energy.

[0209] Furthermore, in the present disclosure, the manufacturing process for producing the transparent display device can be reduced, and the generation of greenhouse gases due to the manufacturing process can be reduced, thereby improving ESG (environment / social / governance) quality.

[0210] The display device according to one or more example embodiments of the present disclosure may be applied to mobile devices, video phones, smart watches, watch phones, wearable devices, foldable devices, rollable devices, bendable devices, flexible devices, curved devices, variable devices, sliding devices, electronic notepads, electronic books, portable multimedia players (PMPs), personal digital assistants (PDAs), MP3 players, mobile medical devices, desktop personal computers (PCs), laptop PCs, netbook computers, workstations, navigation devices, car navigation devices, automatic display devices, automotive devices, theater devices, theater display devices, TVs, wallpaper display devices, signage devices, game consoles, laptop computers, monitors, cameras, camcorders, home appliances, etc., but the embodiments of the present disclosure are not limited thereto.

[0211] Furthermore, in the present disclosure, the dielectric constant difference between the first dielectric and the second dielectric can be large, and the plurality of light-shielding particles can perfectly move into the grooves of the first dielectric.

[0212] The above-mentioned features, structures and effects of the present disclosure are included in at least one embodiment of the present disclosure, but are not limited to only one embodiment. In addition, the features, structures and effects described in at least one embodiment of the present disclosure can be realized by those skilled in the art through the combination or modification of other embodiments. Therefore, the contents associated with the combination and modification should be interpreted as being within the scope of the present disclosure.

[0213] It will be apparent to those skilled in the art that various modifications and variations can be made to the present disclosure without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to cover modifications and variations of the present disclosure.

[0214] The various embodiments described above can be combined to provide additional embodiments. In view of the above detailed description, these and other changes can be made to the embodiments. Generally, in the appended claims, the terms used should not be interpreted as limiting the claims to the specific embodiments disclosed in the specification and claims, but should be interpreted as including all possible embodiments and the full range of equivalents enjoyed by these claims. Therefore, the claims are not limited by this disclosure.

[0215] CROSS-REFERENCE TO RELATED APPLICATIONS

[0216] This application claims priority to Korean Patent Application No. 10-2023-0111484 filed in Korea on August 24, 2023, the entire contents of which are expressly incorporated by reference into this application as if fully set forth herein.

Claims

1. A light control panel, comprising: a first electrode and a second electrode, wherein the first electrode and the second electrode are arranged to face each other; as well as a dielectric layer, the dielectric layer being disposed between the first electrode and the second electrode, Wherein, the dielectric layer comprises: a first dielectric, the first dielectric comprising a first dielectric material and a groove, the first dielectric material having a first dielectric constant; and A second dielectric includes a plurality of light-shielding particles and a solvent, wherein the solvent includes a second dielectric material having a second dielectric constant smaller than the first dielectric constant.

2. The light control panel according to claim 1, wherein: A difference between the first dielectric constant and the second dielectric constant is equal to or greater than 15.

3. The light control panel according to claim 2, wherein: The first dielectric includes a guide pattern having a convex top surface, and Wherein, the groove is arranged on at least one side of the guide pattern.

4. The light control panel according to claim 3, wherein: The first dielectric further includes a spacer maintaining a gap between the first electrode and the second electrode.

5. The light control panel according to claim 4, wherein: The groove is disposed between the guide pattern and the spacer.

6. The light control panel according to claim 4, wherein: The groove is disposed between two adjacent guide patterns.

7. The light control panel according to claim 4, wherein: The guide pattern, the groove, and the spacer are formed as one body.

8. The light control panel according to claim 1, wherein: The first dielectric includes a guide pattern extending in a first direction, and Wherein, the groove extends parallel to the guide pattern in the first direction.

9. The light control panel according to claim 1, wherein: The first dielectric is disposed on a top surface of the first electrode, and The first dielectric has a first thickness in a region where the groove is provided.

10. The light control panel according to claim 9, wherein: The first dielectric has a second thickness in a region where the guide pattern is disposed, and wherein the first dielectric has a third thickness in a region where the spacer is disposed.

11. The light control panel according to claim 1, wherein: Each of the first electrode and the second electrode is a transparent electrode.

12. A transparent display device, comprising: A display panel including a transmission area for transmitting external light and a non-transmission area provided with a plurality of pixels; as well as a light control panel comprising a first electrode, a second electrode, and a dielectric layer disposed between the first electrode and the second electrode, Wherein, the dielectric layer comprises: a first dielectric including a first dielectric material, a guide pattern having a curved top surface, and a groove disposed at at least one side of the guide pattern; and A second dielectric includes a plurality of light-shielding particles and a second dielectric material.

13. The transparent display device according to claim 12, wherein: The guide pattern is disposed in a region corresponding to the transmission area.

14. The transparent display device according to claim 12, wherein: The first dielectric is disposed on a top surface of the first electrode, and Wherein, the curved top surface of the guide pattern protrudes toward the second electrode.

15. The transparent display device according to claim 12, wherein: The groove is disposed in a region corresponding to the non-transmission area.

16. The transparent display device according to claim 12, wherein: The guide pattern extends in a first direction, and Wherein, the groove extends parallel to the guide pattern in the first direction.

17. The transparent display device according to claim 12, wherein: The first dielectric includes a plurality of guide patterns, and Wherein, in a region corresponding to the non-transmission region, at least one groove is provided between two adjacent guide patterns.

18. The transparent display device according to claim 12, wherein: The first dielectric has a first thickness in a region where the groove is provided.

19. The transparent display device according to claim 12, wherein: The first dielectric further includes a spacer maintaining a gap between the first electrode and the second electrode.

20. The transparent display device according to claim 19, wherein: The spacer is disposed in a region corresponding to the non-transmission region, and Wherein, the groove is disposed between the spacer and the guide pattern.

21. The transparent display device according to claim 19, wherein: The first dielectric includes a plurality of spacers, and Wherein, at least one guide pattern is arranged between two adjacent spacers.

22. The transparent display device according to claim 19, wherein: The guide pattern, the groove, and the spacer are formed as one body.

23. The transparent display device according to claim 19, wherein: The first dielectric has a first thickness in a region where the groove is provided, wherein the first dielectric has a second thickness in a region where the guide pattern is disposed, and The first dielectric has a third thickness in a region where the spacer is provided.

24. The transparent display device according to claim 12, wherein: The first dielectric material has a first dielectric constant, and the second dielectric material has a second dielectric constant that is less than the first dielectric constant.

25. The transparent display device according to claim 12, wherein: A transmission area overlaps with a guide pattern.

26. The transparent display device according to claim 12, wherein: One transmission area overlaps at least two or more guide patterns.

27. The transparent display device according to claim 12, wherein: The display panel further includes data lines extending in a first direction and scan lines extending in a second direction, and Wherein, the guide pattern and the groove extend in the second direction.

28. The transparent display device according to claim 12, wherein: The light control panel is formed of a film type having flexibility to be disposed on one side of the display panel.

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