Display device and method for manufacturing the display device

Abstract

This application relates to a display device and a method of manufacturing the display device, wherein the display device may include: a first substrate and a display unit, wherein the display unit includes a display area and a transmissive area, the display unit further including: an auxiliary layer disposed corresponding to the transmissive area; and a second electrode disposed corresponding to at least a portion of the display area and the transmissive area, or a second electrode disposed only corresponding to the display area, the auxiliary layer comprising a first material, the second electrode comprising a second material, and the first material and the second material each satisfy the following inequality 1: <Inequality 1> ST2-ST1>0mJ / m 2 In inequality 1, ST1 is the surface energy of the first material at 25°C, and ST2 is the surface energy of the second material at 25°C.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of Korean Patent Application No. 10-2019-0048029, filed with the Korean Intellectual Property Office on April 24, 2019, and Korean Patent Application No. 10-2020-0021136, filed on February 20, 2020, the disclosures of which are incorporated herein by reference in their entirety. Technical Field

[0003] One or more embodiments relate to a display device and a method of manufacturing the display device, and more specifically, to a display device having a transmissive region and a method of manufacturing the display device having the transmissive region. Background Technology

[0004] In recent years, display devices have been used for a wide variety of purposes. Furthermore, display devices have become thinner and lighter, thus expanding their applications.

[0005] As an example, research is underway to achieve transmissivity and transparency in display devices. Specifically, attempts have been made to create transparent display devices by making the thin-film transistors or display panels inside the device transparent.

[0006] To achieve such transparent display devices, it is necessary to optimize various parameters of various materials (including substrates, electrodes, insulating films, cover films, etc.), such as composition, arrangement, and thickness. For example, in the case of organic light-emitting display devices, multiple conductive and insulating films, each containing different materials, are stacked. In this respect, optimal characteristics are reduced, making it difficult to obtain the desired transmittance or transparency. Summary of the Invention

[0007] One or more embodiments include a display device having high transmittance of external light and a method of manufacturing said display device. Embodiments of this disclosure may provide a display device in which a common electrode is substantially not formed in the transmissive region.

[0008] The technical problems to be solved by this disclosure are not limited to those mentioned above, and those skilled in the art can clearly understand other technical problems not mentioned by referring to the description of this disclosure.

[0009] Other aspects will be set forth in part in the following description, and will be apparent in part from the description, or may be learned by practice of the presented embodiments.

[0010] According to the implementation scheme, the display device includes: a first substrate and a display unit.

[0011] The display unit includes a display area and a transmissive area.

[0012] The display unit further includes: an auxiliary layer disposed corresponding to the transmissive area; and a second electrode disposed only corresponding to the display area.

[0013] The auxiliary layer comprises a first material.

[0014] The second electrode comprises a second material, and

[0015] The first material and the second material each satisfy the following inequality 1:

[0016] Inequality 1

[0017] ST2-ST1>0mJ / m 2

[0018] In inequality 1,

[0019] ST1 is the surface energy of the first material at 25°C, and

[0020] ST2 is the surface energy of the second material at 25°C.

[0021] In one embodiment, the second electrode may not be present in the transmission region.

[0022] In one implementation, ST1 can be greater than approximately 0 mJ / m 2 And it is approximately 30 mJ / m 2 or less than 30mJ / m 2 .

[0023] In one embodiment, the first material may contain 20 at% or more of fluorine.

[0024] In one embodiment, the first material may include a fluorinated silane compound, a fluorine-based polymer compound, or any combination thereof.

[0025] In one embodiment, the second material may comprise magnesium (Mg), silver (Ag), aluminum (Al), lithium (Li), calcium (Ca), indium (In), or any combination thereof.

[0026] In one or more embodiments, the display device may include: a first substrate and a display unit.

[0027] The display unit includes a display area and a transmissive area.

[0028] The display unit further includes: an auxiliary layer disposed corresponding to the transmissive region; and a second electrode disposed corresponding to at least a portion of the display region and the transmissive region.

[0029] The auxiliary layer comprises a first material.

[0030] The second electrode comprises a second material, and

[0031] The first material and the second material each satisfy the following inequality 1:

[0032] Inequality 1

[0033] ST2-ST1>0mJ / m 2

[0034] In inequality 1,

[0035] ST1 is the surface energy of the first material at 25°C, and

[0036] ST2 is the surface energy of the second material at 25°C.

[0037] In one embodiment, the second electrode may be disposed corresponding to both the display area and all of the transmissive area.

[0038] The first portion of the second electrode can be configured correspondingly to the display area.

[0039] The second portion of the second electrode can be disposed corresponding to the transmission region, and

[0040] The thicknesses of the first portion (T1) and the second portion (T2) can each satisfy the following inequality 2:

[0041] Inequality 2

[0042] T1>T2.

[0043] In one implementation, T2 can be greater than about 0 nm and about 1 nm or less than 1 nm.

[0044] In one embodiment, the second electrode may be disposed corresponding to a portion of the display area and the transmissive area.

[0045] A portion of the second electrode, disposed corresponding to a portion of the transmission region, may contain a plurality of particles containing the second material.

[0046] In one embodiment, the thickness of the portion of the second electrode disposed corresponding to the display area may be greater than the average diameter of the plurality of particles.

[0047] In one implementation, ST1 can be greater than about 0 mJ / m 2 And it is approximately 30 mJ / m 2 or less than 30mJ / m 2 .

[0048] In one embodiment, the first material may contain 20 at% or more of fluorine.

[0049] In one embodiment, the first material may include a fluorinated silane compound, a fluorine-based polymer compound, or any combination thereof.

[0050] In one embodiment, the second material may comprise magnesium (Mg), silver (Ag), aluminum (Al), lithium (Li), calcium (Ca), indium (In), or any combination thereof.

[0051] In one embodiment, the display device may further include a first electrode and an intermediate layer, and

[0052] The intermediate layer can be disposed between the first electrode and the second electrode.

[0053] In one embodiment, a method of manufacturing a display device includes: providing a first substrate; and

[0054] A display unit is provided on the first substrate, wherein the display unit includes a display area and a transmissive area.

[0055] The provision of the display unit includes: providing an auxiliary layer only on the transmissive region; and providing a second electrode on the display region or on both the display region and the transmissive region.

[0056] The auxiliary layer comprises a first material.

[0057] The second electrode comprises a second material, and

[0058] The first material and the second material each satisfy the following inequality 1:

[0059] Inequality 1

[0060] ST2-ST1>0mJ / m 2

[0061] In inequality 1,

[0062] ST1 is the surface energy of the first material at 25°C, and

[0063] ST2 is the surface energy of the second material at 25°C.

[0064] In one embodiment, the second electrode can be provided by depositing the second material using an open mask.

[0065] In one embodiment, the display device may further include a first electrode and an intermediate layer.

[0066] The intermediate layer can be provided on the first electrode.

[0067] The auxiliary layer may be provided only on the transmissive region, and then,

[0068] The second electrode may be provided on the intermediate layer or on both the intermediate layer and the auxiliary layer.

[0069] In one embodiment, the display device further includes a first electrode and an intermediate layer, wherein the auxiliary layer may be provided only on the transmissive region, and then,

[0070] The intermediate layer may be provided on the first electrode, and the second electrode may be provided on the intermediate layer or on both the intermediate layer and the auxiliary layer. Attached Figure Description

[0071] These and / or other aspects will become apparent and more readily understood from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0072] Figure 1 This is a schematic illustration of the structural view of a display device according to the implementation scheme;

[0073] Figure 2 and Figure 3 Each is a schematic illustration of a cross-sectional view and a plan view of a display device according to the embodiment;

[0074] Figure 4 This is an illustrative example based on another implementation scheme. Figure 2 A cross-sectional view of the display device;

[0075] Figure 5 It is a detailed example. Figure 4 A cross-sectional view of the display unit of a display device;

[0076] Figure 6 and Figure 7 Each is a schematic illustration of a cross-sectional view and a plan view of a display device according to another embodiment;

[0077] Figure 8 This is an illustrative example based on another implementation scheme. Figure 6 A cross-sectional view of the display device;

[0078] Figures 9 to 14 Each is a cross-sectional view illustrating a method of manufacturing a display device according to an embodiment;

[0079] Figure 15 and Figure 16 Each is a cross-sectional view illustrating a method of manufacturing a display device according to another embodiment;

[0080] Figure 17 It is a block diagram that schematically illustrates the configuration of the electronic device according to the implementation scheme;

[0081] Figure 18A and Figure 18B Each is a perspective view that schematically illustrates an electronic device according to the implementation scheme;

[0082] Figure 19 This is a graph showing the wavelength-dependent transmittance in Example 1, Comparative Example 1, and Comparative Example 2;

[0083] Figure 20 This is a graph showing the wavelength-dependent transmittance in Example 2 and Comparative Example 3;

[0084] Figure 21A These are transmission electron microscope (TEM) images from Example 2;

[0085] Figure 21B The TEM image is a comparison of Example 3; and

[0086] Figure 21C yes Figure 21A A magnified view of a portion of the image. Detailed Implementation

[0087] Reference will now be made in detail to embodiments exemplified in the accompanying drawings, wherein the same reference numerals refer to the same elements throughout. In this respect, embodiments may take different forms and should not be construed as being limited to the description set forth herein. Therefore, the following description, with reference to the accompanying drawings, describes only embodiments to explain aspects of the present description. As used herein, the term “and / or” includes any combination and all combinations of one or more of the items in the relevant list. Expressions such as “at least one of…” preceding a column of elements modify the entire column of elements and not individual elements within that column. The term “at%” refers to atomic percentages unless otherwise specified.

[0088] Because the implementation schemes allow for various changes and numerous implementations, exemplary implementation schemes will be illustrated in the accompanying drawings and described in detail in the written description. The effects and features of this disclosure, as well as methods for achieving said effects and features, will become apparent from the examples described in detail below in conjunction with the accompanying drawings. However, this disclosure can be implemented in many different forms and should not be construed as being limited to the examples set forth herein.

[0089] The present disclosure will be described in detail below with reference to the accompanying drawings. Here, in different drawings, the same reference numerals may denote the same or corresponding elements, and redundant descriptions will be omitted.

[0090] In the following examples, terms such as "first," "second," etc., can be used to describe various components, and such components should not be limited by the terms above. The terms above are only used to distinguish one component from another.

[0091] In the following examples, the singular expression covers the plural expression, unless the context clearly has a different meaning.

[0092] In the following instances, it should be understood that terms such as “including,” “having,” and “comprising” are intended to indicate the presence of a feature or component disclosed in the specification, and not to exclude the possibility that one or more other features or components may be present or added.

[0093] In the following examples, it should be understood that when a layer, area, or component is referred to as being "formed on" another layer, area, or component, it can be formed directly or indirectly on other layers, areas, or components. That is, for example, there can be intermediate layers, areas, or components.

[0094] For ease of explanation, the dimensions of the components in the accompanying drawings may be enlarged. In other words, since the dimensions and thicknesses of the components in the accompanying drawings are arbitrarily illustrated for ease of explanation, the following embodiments are not limited thereto.

[0095] When certain implementation schemes can be achieved differently, the specific process sequence can be different from the order in which they are described. For example, two consecutively described processes can be performed substantially simultaneously or in the reverse order of their description.

[0096] In the following examples, it should be understood that when layers, zones, or components are connected, linked, or coupled, they can be directly connected, linked, or coupled. Furthermore, layers, zones, or components can be indirectly connected, linked, or coupled to other intermediate layers, zones, or components. For example, it should be understood that when layers, zones, or components are electrically connected, linked, or coupled, they can be in direct electrical contact with each other. Furthermore, layers, zones, or components can be indirectly in electrical contact with other intermediate layers, zones, or components.

[0097] Figure 1 This is a schematic illustration of a cross-sectional view of a display device according to an implementation scheme.

[0098] refer to Figure 1 According to an embodiment, the display device 1 includes a first substrate 10 and a display unit 20. The display unit 20 may include a display area 100 in which an image is displayed and a transmission area 200 through which external light is transmitted. In the display device 1, external light passes through the first substrate 10 and the display unit 20 and is then incident.

[0099] The display unit 20 displays an image through the display area 100, and external light passes through the transmission area 200. The user U can see the external image through the transmission area 200. That is, the display device 1 can achieve a display in which the transmittance of the display area 100 is different from the transmittance of the transmission area 200.

[0100] In one embodiment, a top-emitting display device is described as an example, wherein a user U located on the side where the image is implemented can observe an external image of the first substrate 10. However, the display device 1 of this disclosure is not limited thereto. In one or more embodiments, the display device 1 of this disclosure may be a bottom-emitting display device, wherein an image is implemented from the display unit 20 in the direction of the first substrate 10.

[0101] By not providing thin-film transistors, capacitors, etc., in the transmission region 200, the external light transmittance of the transmission region 200 can be increased. Therefore, the external light transmittance of the display device 1 can be increased, and distortion of the transmitted image caused by interference with thin-film transistors, capacitors, etc. can be avoided.

[0102] The display device 1 may further include a second substrate 30 facing the first substrate 10. In this embodiment, the display unit 20 can be located on both the first substrate 10 and the second substrate 30 (see [link to documentation]). Figure 14 )between.

[0103] The second substrate 30 can be formed as a transparent glass substrate or a plastic substrate to enable the image from the display unit 20 and prevent external air and moisture from penetrating into the display unit 20. The edges of the first substrate 10 and the second substrate 30 can be bonded together with a sealant, so that the space between the first substrate 10 and the second substrate 30 can also be sealed. A moisture absorbent or filler can be placed in this space. In one embodiment, the display unit 20 can be sealed by forming a second substrate 30, which is a thin film on both the first substrate 10 and the display unit 20. In this case, both the first substrate 10 and the second substrate 30 can be provided in a flexible form.

[0104] In the following description, organic light-emitting display devices will be used as examples of display device 1 according to embodiments of this disclosure. However, display device 1 is not limited thereto. Various types of display devices, such as inorganic light-emitting display devices, quantum dot light-emitting display devices, etc., can be used in one or more embodiments.

[0105] Figure 2 and Figure 3 Each is a schematic cross-sectional view and a plan view of the display device 1A according to an embodiment. In detail, Figure 3 This is a plan view illustrating a first pixel PX1, including, for example, a first red pixel Pr, a first green pixel Pg, and a first blue pixel Pb. Figure 2 It is along Figure 3 A cross-sectional view taken by the A-A' line in the diagram.

[0106] refer to Figure 2 The display unit 20 may include a display area 100 in which an image is displayed and a transmissive area 200 adjacent to the display area 100 through which external light is transmitted. Here, external light is distinct from the light emitted by the light-emitting device EL1 of the first pixel PX1. External light may be ambient light or light emitted by other electronic devices.

[0107] In the transmissive zone 200, no device containing opaque material is provided, and essentially only a transparent auxiliary layer, insulating film, etc., can be provided. The image on the outside of the display device 1A can be transmitted as is.

[0108] The first external light 61 and the second external light 62 can pass through the transmission region 200. The first external light 61 can be light transmitted from the outside of the display unit 20 in the direction outside the first substrate 10. The second external light 62 can be light transmitted from the outside of the first substrate 10 in the direction outside the display unit 20. Devices and wiring can be arranged in a roundabout manner around the transmission region 200, such that devices and wiring may not be arranged on the transmission region 200. At least a fourth insulating film 15 may not be provided on the transmission region 200. The third insulating film 14 provided on the transmission region 200 may contain a transparent insulating material.

[0109] Display area 100 may include an emission area 102 and a circuit area 101. A first pixel PX1 may be disposed on display area 100. A light-emitting device EL1 for the first pixel PX1 may be disposed on emission area 102. A pixel circuit for the first pixel PX1 may be disposed on circuit area 101, wherein the pixel circuit is electrically connected to the light-emitting device EL1 and includes a thin-film transistor TR1. Circuit area 101 and emission area 102 do not overlap, and therefore, the light-emitting device EL1 and the pixel circuit may be disposed adjacent to each other so as not to overlap. As illustrated in the figures, circuit area 101 is not limited to a circuit area in which a thin-film transistor TR1 is disposed. Circuit area 101 may include multiple thin-film transistors and capacitors, and may further include wiring connected to the multiple thin-film transistors and capacitors, such as scan lines, data lines, power lines, etc.

[0110] The thin-film transistor TR1 may include a semiconductor layer 111, a gate electrode 112, a source electrode 113, and a drain electrode 114 on a buffer film 11. The first insulating film 12 between the semiconductor layer 111 and the gate electrode 112 can function as a gate insulating film, and the second insulating films 13 between the gate electrode 112 and the source electrode 113 and between the gate electrode 112 and the drain electrode 114 can function as interlayer insulating films.

[0111] The light-emitting device EL1 may include a first electrode 116 on a third insulating film 14 covering the thin-film transistor TR1, a second electrode 130 facing the first electrode 116, and an intermediate layer 117 between the first electrode 116 and the second electrode 130.

[0112] The two edges of the first electrode 116 can be covered by the fourth insulating film 15, and the central portion of the first electrode 116 can be exposed. The fourth insulating film 15 can be provided to cover the display area 100, but it is not necessary to cover the entire display area 100. Instead, the fourth insulating film 15 is sufficient to cover at least a portion of the first electrode 116, particularly the edges of the first electrode 116.

[0113] An auxiliary layer 118 may be provided on the third insulating film 14 corresponding to the transmission region 200 exposed through the fourth insulating film 15. That is, the auxiliary layer 118 may be provided so as not to overlap with the intermediate layer 117.

[0114] Here, the thickness of the auxiliary layer 118 can be from about 1 nm to about 2,000 nm. Specifically, the thickness of the auxiliary layer 118 can be from about 1 nm to about 50 nm, but the embodiments of this disclosure are not limited thereto. When the thickness is within the above range, the transmittance of the transmission region 200 can be fixed at a relatively high level, while the effect of patterning the second electrode 130 can be sufficiently obtained.

[0115] The auxiliary layer 118 may contain the first material.

[0116] A second electrode 130 may be provided on the intermediate layer 117. The second electrode 130 may be provided only in relation to the display area 100, and may not be provided on the transmissive area 200.

[0117] The second electrode 130 may contain a second material.

[0118] The first material and the second material can each satisfy the following inequality 1:

[0119] Inequality 1

[0120] ST2-ST1>0mJ / m 2

[0121] In inequality 1,

[0122] ST1 is the surface energy of the first material at 25°C, and

[0123] ST2 is the surface energy of the second material at 25°C.

[0124] A first material can be deposited corresponding to the transmissive region 200 using a dry process (e.g., a process using a fine metal mask). In one or more embodiments, the first material can be deposited corresponding to the transmissive region 200 using a wet process. A second material can then be deposited on both the display region 100 and the transmissive region 200 using an open mask. Here, by controlling the surface energies of the first and second materials differently, the second material can be controlled so that it is substantially not deposited in the region where the first material is deposited. That is, the second material can be deposited relatively well on the intermediate layer 117, but not relatively well on the auxiliary layer 118 containing the first material. Therefore, when the auxiliary layer 118 containing the first material is deposited corresponding to the transmissive region 200, the second electrode 130 containing the second material is substantially not provided in the transmissive region 200, and can instead be provided only corresponding to the display region 100. Figure 2 and Figure 3 As shown, the auxiliary layer 118 is disposed on the area where the second electrode 130 should not be disposed, and the auxiliary layer 118 is not disposed on the area where the second electrode 130 should be disposed. In this respect, when the second material is disposed, even though the second material is deposited on both the display area 100 and the transmission area 200 of all pixels by using an aperture mask, the second material is essentially deposited only on the exposed surface of the intermediate layer 117 and is essentially not deposited on the surface of the auxiliary layer 118, thereby achieving the effect of patterning the second electrode 130.

[0125] To increase the transmittance of the transmission region 200, the second electrode 130 should essentially not be disposed on the transmission region 200. Therefore, when forming the second electrode 130 only disposed on the display region 100 using a fine metal mask, the deposition temperature is significantly high, allowing deformation to occur within the fine metal mask during long-term use. This can lead to highly unstable factors in the process, such as shadowing phenomena. However, the display device 1 according to the embodiment of this disclosure can automatically obtain the patterned effect of the second electrode 130 as described above. Therefore, the display device 1 according to the embodiment of this disclosure can be advantageous in this process.

[0126] Furthermore, since the second electrode 130 is not substantially disposed on the transmission region 200, the transmittance of the transmission region 200 can be improved. In other words, the second electrode 130 can be disposed only corresponding to the display region 100, and since the second electrode 130 is not present in the transmission region 200, the transmittance of the transmission region 200 can be improved.

[0127] For example, ST2-ST1 could be approximately 30 mJ / m 2 or greater than 30 mJ / m 2 And, for example, it could be about 50 mJ / m 2 or greater than 50 mJ / m 2 When ST2-ST1 are within the above range, the second material may not be deposited on the first material.

[0128] For example, ST1 can be greater than approximately 0 mJ / m 2 And it is 30mJ / m 2 or less than 30mJ / m 2 When ST1 is within the above range, the second material can essentially not be deposited on the first material. Specifically, ST1 can be 20 mJ / m 2 or less than 20 mJ / m 2 However, the implementation of this disclosure is not limited to this.

[0129] In one embodiment, the first material may be composed of an organic compound. In one or more embodiments, the first material may be composed of a fluorine-containing organic compound. In one or more embodiments, the first material may be an organic compound containing a relative amount of fluorine.

[0130] For example, the first material may contain 20 at% or more of fluorine. When the amount of fluorine is within this range, the surface energy of the first material can be reduced, so that the second material can substantially not be deposited on the first material. The amount of fluorine contained in the first material can be obtained by analyzing the first material using X-ray photoelectron spectroscopy (XPS). Specifically, the first material may contain 50 at% or more of fluorine, but the embodiments of this disclosure are not limited thereto.

[0131] For example, as described above, the first material may be composed of an organic compound, and the first material may include fluorinated silane compounds, fluorine-based polymer compounds, and combinations thereof.

[0132] Examples of fluorinated silane compounds include trichloro(1H,1H,2H,2H-perfluorodecyl)silane, trichloro(1H,1H,2H,2H-perfluoro-n-octyl)silane, triethoxy-1H,1H,2H,2H-perfluorodecylsilane, 1H,1H,2H,2H-nonafluorohexyltriethoxysilane, 1H,1H,2H,2H-tetrafluoro-n-octyltriethoxysilane, 1H,1H,2H,2H-heptafluorodecyltrimethoxysilane, and 1H,1H,2H,2H-nonafluorohexyltrimethoxysilane. Trimethoxy(1H,1H,2H,2H-perfluoro-n-octyl)silane, 1,1,1-trifluoro-3-(trimethoxysilyl)propane, (triethylsilyl)trifluoromethane, triethoxy[5,5,6,6,7,7,7-heptafluoro-4,4-bis(trifluoromethyl)heptyl]silane, trichloro(3,3,3-trifluoropropyl)silane, dimethoxy(methyl)(3,3,3-trifluoropropyl)silane, and dichloro(methyl)(3,3,3-trifluoropropyl)silane, but embodiments thereof are not limited thereto.

[0133] Examples of fluorine-based compounds include poly(hexafluoropropylene oxide), poly(tetrafluoroethylene-co-hexafluoropropylene), poly(decafluorooctyl acrylate), poly(tetrafluoro-3-(heptafluoropropoxy)propyl acrylate), poly(tetrafluoro-3-(heptafluoroethoxy)propyl acrylate), poly(tetrafluoroethylene), tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride terpolymer, poly(undecafluorohexyl acrylate), poly(nonafluoropentyl acrylate), poly(tetrafluoro-3-(trifluoromethoxy)propyl acrylate), poly(pentafluorovinyl propionate), poly(heptafluorobutyl acrylate), poly(trifluoroethylene-hexafluoropropionate), and poly(trifluoroethylene-hexafluoropropionate). The following are examples of poly(fluorovinyl acetate), poly(1,1,1,3,3,3-hexafluoroisopropyl acrylate), poly(octafluoropentyl acrylate), poly(methyl 3,3,3-trifluoropropylsiloxane), poly(2,2,3,3,4,4,4-heptafluorobutyl methacrylate), poly(pentafluoropropyl acrylate), poly(2,2,3,3,3-pentafluoropropyl acrylate), poly(2-heptafluorobutoxy)ethyl acrylate, poly(chlorotrifluoroethylene), and poly(1,1,1,3,3,3-hexafluoroisopropyl methacrylate), but embodiments thereof are not limited thereto.

[0134] When the difference between ST2 and ST1 is large, it is unlikely that the second material will be deposited substantially on the first material. To achieve this, ST2 can be greater than 30 mJ / m 2 In one implementation, ST2 can be 100 mJ / m 2 or greater than 100mJ / m 2 However, the implementation of this disclosure is not limited to this.

[0135] In one embodiment, the second material may be composed of an inorganic compound. Specifically, the second material may be composed of a metal-containing inorganic compound.

[0136] For example, the second material may comprise magnesium (Mg), silver (Ag), aluminum (Al), lithium (Li), calcium (Ca), indium (In), and combinations thereof. Specifically, the second material may comprise Mg, Ag, Al, and combinations thereof.

[0137] The first pixel PX1 can be, for example, a first red pixel Pr, a first green pixel Pg, and a first blue pixel Pb. However, this disclosure is not limited to this, and any combination of colors is possible as long as white light can be achieved through combination.

[0138] Figure 4 It is an illustrative example. Figure 2 A cross-sectional view of another embodiment of the display device 1B. Figure 5 is a concrete example Figure 4 A cross-sectional view of the display unit 20.

[0139] In one embodiment, the auxiliary layer 118 can be formed only on the transmissive region 200 using a fine metal mask for patterning. In one or more embodiments, with Figure 2 Unlike other display devices, the second electrode 130 can be disposed corresponding to at least a portion of the display area 100 and the transmissive area 200. That is, the second electrode 130 can be disposed corresponding to all or at least a portion of the transmissive area 200.

[0140] The following will describe in detail an embodiment in which the second electrode 130 is configured in complete correspondence with the display area 100 and the transmission area 200.

[0141] like Figure 5 As shown, when the second material is deposited using an aperture mask, the first portion 130a of the second electrode 130 can be disposed on the intermediate layer 117 corresponding to the display area 100, and the second portion 130b of the second electrode 130 can be disposed on the auxiliary layer 118 corresponding to the transmission area 200. The thickness T1 of the first portion 130a and the thickness T2 of the second portion 130b each independently satisfy the following inequality 2:

[0142] Inequality 2

[0143] T1>T2.

[0144] By satisfying inequality 2 above, the reduction in transmittance due to the second part 130b can be prevented.

[0145] Here, T1 represents the average thickness of the second electrode 130 in all the first portions, and T2 represents the average thickness of the second electrode 130 in all the second portions. The region where the second material is deposited using the opening mask is comprised of the sum of all the first portions and all the second portions.

[0146] However, the above description does not exclude the possibility that the second electrode 130 may be formed by agglomeration on a portion of the transmission region 200. That is, the second electrode 130 may be formed on the transmission region 200 in the form of islands.

[0147] Specifically, T2 can be greater than about 0 nm and about 1 nm or less than 1 nm. More specifically, T2 can be greater than 0 nm and about 0.1 nm or less than 0.1 nm. When T2 is within the above range, the second electrode 130 may not be substantially disposed on the transmission region 200.

[0148] In the following description, an embodiment in which the second electrode 130 is disposed corresponding to at least a portion of the display area 100 and the transmission area 200 will be described in detail. That is, the second electrode 130 may not be disposed corresponding to at least a portion of the transmission area 200.

[0149] A portion of the second electrode 130, which is disposed corresponding to at least a portion of the transmission region, may contain a plurality of particles containing a second material.

[0150] In some embodiments, the thickness of a portion of the second electrode 130 disposed corresponding to the display area 100 may be greater than the average diameter of the plurality of particles. In some embodiments, the thickness (T) of a portion of the second electrode 130 disposed corresponding to the display area 100 E ) and the average diameter (D) of a plurality of particles disposed corresponding to at least a portion of the transmission zone 200. M The ratio (R) of the transmittance can be 0.9 or less than 0.9. In some embodiments, R can be 0.01 or greater than 0.01, 0.1 or greater than 0.1, 0.8 or less than 0.8, 0.7 or less than 0.7, 0.6 or less than 0.6, or 0.5 or less than 0.5, but the embodiments are not limited thereto. When R is within any of these ranges, the display device 1 can have the desired level of transmittance:

[0151] R = {the thickness of a portion of the second electrode 130 corresponding to the display area 100 (T)} E The average diameter (D) of a plurality of particles disposed corresponding to at least a portion of the transmission zone 200 M )}

[0152] For example, when T E When it is about 10nm, D M It can be approximately 5nm or less, or for example, when T E When it is about 20nm, D M It can be approximately 10nm or less.

[0153] Each component and Figure 2 and Figure 3 The corresponding components of the implementation scheme are functionally identical or similar, and therefore, a detailed description of each component will be omitted.

[0154] Figure 6 and Figure 7 Each is a schematic illustration of a cross-sectional view and a plan view of a display device 2A according to another embodiment. In detail, Figure 7 It is a plan view illustrating the first pixels PX1 (e.g., the first red pixel Pr, the first green pixel Pg, and the first blue pixel Pb) that are adjacent to each other, and Figure 6 It is along Figure 7 A cross-sectional view taken by the A-A' line in the diagram.

[0155] and Figure 2 and Figure 3 The display device 1A shown in the example is different. Figure 6 and Figure 7 In the illustrated display device 2A, the circuit area 101 and the emission area 102 included in the display area 100 can be arranged to overlap each other on a plane.

[0156] Furthermore, adjacent transmissive regions of multiple first pixels PX1 (e.g., first red pixel Pr, first green pixel Pg, and first blue pixel Pb) can be connected to each other to form a common transmissive region 200. In this case, the resulting common transmissive region 200 can be more than Figure 2 and Figure 3 The transmission area 200 of the proposed implementation is wider. Therefore, the display device 2A can have increased transmittance.

[0157] Each component and Figure 2 and Figure 3 The corresponding components of the implementation scheme are functionally identical or similar, and therefore, a detailed description of each component will be omitted.

[0158] Figure 8 It is an illustrative example based on Figure 6 A cross-sectional view of display device 2B, another embodiment of display device 2A.

[0159] In one embodiment, the auxiliary layer 118 can be formed only on the transmissive region 200 using a fine metal mask for patterning. In one or more embodiments, with Figure 6 Unlike other display devices, the second electrode 130 can be disposed corresponding to at least a portion of the display area 100 and the transmissive area 200. That is, the second electrode 130 can be disposed corresponding to all or at least a portion of the transmissive area 200.

[0160] The following will describe in detail an embodiment in which the second electrode 130 is configured in complete correspondence with the display area 100 and the transmission area 200.

[0161] When the second material is deposited using an aperture mask, the first portion 130a of the second electrode 130 can be disposed on the intermediate layer 117 corresponding to the display area 100, and the second portion 130b of the second electrode 130 can be disposed on the auxiliary layer 118 corresponding to the transmission area 200. The thickness of the first portion 130a is denoted as the first thickness (T1), and the thickness of the second portion 130b is denoted as the second thickness (T2), wherein T1 and T2 independently satisfy the following inequality 2:

[0162] Inequality 2

[0163] T1>T2.

[0164] In inequality 2,

[0165] T1 represents the thickness of the second electrode 130 on the display area 100; and

[0166] T2 represents the thickness of the second electrode 130 on the transmission region 200.

[0167] By satisfying inequality 2 above, the reduction in transmittance caused by the second part 130b can be prevented.

[0168] Specifically, T2 can be greater than about 0 nm and about 1 nm or less than 1 nm. More specifically, T2 can be greater than 0 nm and about 0.1 nm or less than 0.1 nm. When T2 is within the above range, the second electrode 130 may not be substantially disposed on the transmission region 200.

[0169] The following will describe in detail an embodiment in which the second electrode 130 is disposed corresponding to at least a portion of the display area 100 and the transmissive area 200. That is, the second electrode 130 may not be disposed corresponding to at least a portion of the transmissive area 200.

[0170] A portion of the second electrode 130, which is disposed corresponding to at least a portion of the transmission region, may contain a plurality of particles containing a second material.

[0171] In some embodiments, the thickness of a portion of the second electrode 130 disposed corresponding to the display area 100 may be greater than the average diameter of the plurality of particles. In some embodiments, the thickness (T) of a portion of the second electrode 130 disposed corresponding to the display area 100 E ) and the average diameter (D) of a plurality of particles disposed corresponding to at least a portion of the transmission zone 200. M The ratio (R) of the transmittance can be 0.9 or less than 0.9. In some embodiments, R can be 0.01 or greater than 0.01, 0.1 or greater than 0.1, 0.8 or less than 0.8, 0.7 or less than 0.7, 0.6 or less than 0.6, or 0.5 or less than 0.5, but the embodiments are not limited thereto. When R is within any of these ranges, the display device 1 can have the desired level of transmittance:

[0172] R = {the thickness of a portion of the second electrode 130 corresponding to the display area 100 (T)} E The average diameter (D) of a plurality of particles disposed corresponding to at least a portion of the transmission zone 200 M )}

[0173] For example, when T E At 10nm, D M It can be about 5nm or less, or for example, when T E At 20nm, D MIt can be approximately 10nm or less.

[0174] Each component and Figures 2 to 3 The corresponding components of the implementation scheme are functionally identical or similar, and therefore, a detailed description of each component will be omitted.

[0175] Figures 9 to 14 Each is a cross-sectional view illustrating a method for preparing a display device 1A according to an embodiment.

[0176] refer to Figures 9 to 14 A method for preparing a display device 1A according to an embodiment of the present disclosure includes: providing a first substrate and providing a display unit on the first substrate, wherein the display unit includes a display area and a transmissive area, wherein providing the display unit includes: providing an auxiliary layer only on the transmissive area; and providing a second electrode on the display area or on both the display area and the transmissive area, the auxiliary layer comprising a first material and the second electrode comprising a second material, wherein the descriptions of the first material and the second material are the same as those described above.

[0177] The method for preparing the display device 1A according to the embodiment will be described in detail below with reference to the accompanying drawings.

[0178] refer to Figure 9 A buffer film 11 is provided on the first substrate 10, and a pixel circuit including a thin-film transistor TR1 is provided on the buffer film 11.

[0179] The first substrate 10 may comprise glass, ceramic, metal, plastic, or a material with flexible or bendable properties.

[0180] The buffer film 11 prevents impurity elements from penetrating through the first substrate 10, thereby planarizing the surface, and is made of materials such as silicon nitride (SiN). x ) and / or silicon oxide (SiO) x The inorganic material is formed in a single layer or multiple layers. The use of buffer membrane 11 can be omitted.

[0181] On the buffer film 11, a semiconductor layer 111 may be provided for the first pixel PX1 of the display device 1A. The semiconductor layer 111 may contain various materials. For example, the semiconductor layer 111 may contain inorganic semiconductor materials, such as amorphous silicon or crystalline silicon. In one or more embodiments, the semiconductor layer 111 may contain oxide semiconductor or organic semiconductor materials.

[0182] A first insulating film 12 may be provided on the buffer film 11 to cover the semiconductor layer 111, and a gate electrode 112 of the first pixel PX1 may be provided on the first insulating film 12.

[0183] The first insulating film 12 may be formed in single or multiple layers from at least one selected from SiO2, silicon nitride, SiON, Al2O3, TiO2, Ta2O5, HfO2, ZrO2, BST, and PZT. The first insulating film 12 may be an inorganic insulating film.

[0184] The gate electrode 112 can be formed of various conductive materials. For example, the gate electrode 112 can be formed in a single layer or multiple layers of at least one material selected from aluminum (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), molybdenum (Mo), titanium (Ti), tungsten (W), and copper (Cu). For example, the gate electrode 112 can be formed in a three-layer structure of Mo / Al / Mo or Ti / Al / Ti.

[0185] A second insulating film 13 may be provided on the first insulating film 12 to cover the gate electrode 112. The source electrode 113 and drain electrode 114 of the first pixel PX1 may be provided on the second insulating film 13, such that each of the source electrode 113 and drain electrode 114 can be electrically connected to the semiconductor layer 111 through a contact hole.

[0186] The second insulating film 13 may be an inorganic insulating film. The second insulating film 13 may be formed in single or multiple layers from at least one selected from SiO2, silicon nitride, SiON, Al2O3, TiO2, Ta2O5, HfO2, ZrO2, BST, and PZT. In one or more embodiments, the second insulating film 13 may be an organic insulating film.

[0187] The source electrode 113 and drain electrode 114 can be formed of various conductive materials. For example, the source electrode 113 and drain electrode 114 can be formed in a single layer or multiple layers of at least one material selected from aluminum (Al), platinum (Pt), palladium (Pd), silver (Ag), magnesium (Mg), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), molybdenum (Mo), titanium (Ti), tungsten (W), and copper (Cu). For example, the source electrode 113 and drain electrode 114 can be formed in two layers or more.

[0188] The structure of the thin-film transistor TR1 is not limited to the structure illustrated herein, and various structures of thin-film transistors can be applied.

[0189] A third insulating film 14 can be provided to cover the thin-film transistor TR1 of the first pixel PX1.

[0190] The third insulating film 14 can be formed from an organic insulating film having a planarized top surface in a single layer or multiple layers. The third insulating film 14 can comprise general-purpose polymers (e.g., PMMA, PS, etc.), polymer derivatives containing phenolic groups, acryloyl-based polymers, imide-based polymers, aryl ether-based polymers, amide-based polymers, fluorine-based polymers, p-xylene-based polymers, vinyl alcohol-based polymers, and blends thereof. For example, the third insulating film 14 can comprise polyimide, polyamide, acrylic resin, etc.

[0191] Typically, the surface energy of the compound contained in the third insulating film 14 is 100 mJ / m. 2 or greater than 100mJ / m 2 Therefore, when the second material is deposited directly onto both the display area 100 and the transmission area 200 using an aperture mask without forming the auxiliary layer 118 on the transmission area 200, the surface energy of the compound contained in the third insulating film 14 can be equal to or similar to the surface energy of the second material. Therefore, the effect of patterning the second electrode 130 cannot be achieved at all.

[0192] On the third insulating film 14, a first electrode 116 of a light-emitting device EL1 electrically connected to the thin-film transistor TR1 of the first pixel PX1 can be provided. The first electrode 116 can be provided corresponding to the display area 100.

[0193] When the light-emitting device EL1 is a top-emitting type, the first electrode 116 can be formed as a reflective electrode. Such a reflective electrode may include a reflective layer comprising Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, or compounds thereof, and a transparent or translucent electrode layer on the reflective layer. When the light-emitting device EL1 is a bottom-emitting type, the first electrode 116 may include a transparent material such as ITO, IZO, ZnO, or In2O3, and can be formed as a transparent or translucent electrode.

[0194] like Figure 9 As illustrated, a buffer film 11, a first insulating film 12, a second insulating film 13, and a third insulating film 14 may each be provided to cover both the display area 100 and the transmissive area 200. However, embodiments of this disclosure are not limited thereto, and at least one of the buffer film 11, the first insulating film 12, the second insulating film 13, and the third insulating film 14 may include an opening (not shown) located at a position corresponding to the transmissive area 200, thereby increasing the transmittance of external light in the transmissive area 200.

[0195] External light passes through the transmission zone 200 and is then perceived by the user. Therefore, only transparent insulating films or the like can be disposed on the transmission zone 200. Furthermore, the transmittance of the transmission zone 200 can be increased by minimizing reflections generated at the interference points of the film disposed on the transmission zone 200.

[0196] As the refractive index difference between contacting films increases, interface reflection can increase. In one embodiment, buffer film 11, first insulating film 12, second insulating film 13, and third insulating film 14 can all be single films with substantially the same refractive index. When the refractive indices of buffer film 11, first insulating film 12, second insulating film 13, and third insulating film 14 disposed on transmission region 200 are all the same, the transmittance of transmission region 200 can be increased by minimizing interface reflection between the films.

[0197] refer to Figure 10 A fourth insulating film 15 may be provided on the third insulating film 14 to cover the edge of the first electrode 116. The fourth insulating film 15 may be an inorganic or organic insulating film formed in a single layer or multiple layers as described above.

[0198] A fourth insulating film 15 may be provided to cover the display area 100 of the display device 1A, but it is not necessary to cover the entire display area 100. Instead, the fourth insulating film 15 is sufficient to cover at least a portion of the first electrode 116 of the first pixel PX1, particularly the edge of the first electrode 116 of the first pixel PX1.

[0199] The fourth insulating film 15 may have a first opening 15a that exposes at least a portion of the first electrode 116 of the first pixel PX1 and a second opening 15b located at a position corresponding to the transmission region 200. Since the fourth insulating film 15 is not located on the transmission region 200, the transmission efficiency of external light in the transmission region 200 can be further increased.

[0200] refer to Figure 11 An intermediate layer 117 can be provided on the first electrode 116 exposed through the first opening 15a of the first pixel PX1.

[0201] The intermediate layer 117 may include an emitting layer for emitting light, and may further include at least one functional layer selected from the hole injection layer (HIL), hole transport layer (HTL), electron transport layer (ETL), and electron injection layer (EIL). However, embodiments of this disclosure are not limited thereto, and various functional layers may be further disposed on the first electrode 116.

[0202] The emitting layer can be a red emitting layer, a green emitting layer, or a blue emitting layer. In one or more embodiments, the emitting layer can have a multilayer structure in which red, green, and blue emitting layers are stacked to emit white light, or it can have a single-layer structure comprising red, green, and blue emitting materials.

[0203] In one embodiment, this can be achieved by using a transmission area 102 having the same characteristics as the display device 1A (see [link]). Figure 2 The mask corresponding to the opening M11 (e.g., fine metal mask (FMM)) provides an intermediate layer 117 only on the emission region 102.

[0204] In one or more embodiments, the emission layer in the intermediate layer 117 can be provided only on the emission region 102 by using an FMM having an opening M11 corresponding to the emission region 102 of the display device 1A, and other functional layers can be provided on the positive surface of the first substrate 10 by using an opening mask.

[0205] In one embodiment, at least the emitting layer is not provided on the transmissive area 200 of the display device 1A.

[0206] refer to Figure 12 An auxiliary layer 118 may be provided on the third insulating film 14 exposed through the second opening 15b.

[0207] In one embodiment, an auxiliary layer 118 may be provided on the transmission region 200 only according to a dry process (e.g., a process using an FMM with an opening M21 corresponding to the transmission region 200).

[0208] In one or more embodiments, the auxiliary layer 118 can be applied only to the transmission region 200 using a wet process.

[0209] refer to Figure 13 In one embodiment, the second electrode 130 may be provided on the intermediate layer 117 or on both the intermediate layer 117 and the auxiliary layer 118.

[0210] The second electrode 130 can be provided by depositing a second material using an open mask. Here, the surface energies of the first material in the auxiliary layer 118 and the second material in the second electrode 130 are controlled differently, such that the second material may be substantially not provided on the transmission region 200 where the first material is provided. That is, the second material can be well deposited on the intermediate layer 117, but may not be well deposited on the auxiliary layer 118 containing the first material. Therefore, since the auxiliary layer 118 containing the first material is disposed corresponding to the transmission region 200, the second electrode 130 containing the second material may be substantially not provided on the transmission region 200, and may be disposed only corresponding to the display region 100.

[0211] refer to Figure 14 After the second substrate 30 is additionally aligned on the first substrate 10, the first substrate 10 and the second substrate 30 can be joined together.

[0212] The second substrate 30 may comprise glass, ceramic, metal, plastic, or a material with flexible or bendable properties.

[0213] On the surface of the second substrate 30 facing the first substrate 10, a black matrix (BM) and a color filter (CF) can be provided. The CF can be provided corresponding to the emitting region 102 of the display device 1A. The BM can be provided corresponding to areas other than the emitting region 102 and the transmissive region 200 of the display device 1A. That is, the BM is not provided on the transmissive region 200 of the display device 1A.

[0214] Although not illustrated, an auxiliary layer may be further disposed on the second electrode 130 before the second substrate 30 is coupled to the first substrate 10. The auxiliary layer may be a single layer or multiple layers of inorganic and / or organic films.

[0215] Furthermore, although not illustrated, various functional layers may be provided on the second substrate 30. For example, the functional layer may be an anti-reflective layer that minimizes reflection on the front surface of the second substrate 30, or an anti-fouling layer that prevents contaminants such as fingerprints.

[0216] In one or more embodiments, a thin-film encapsulation layer, instead of the second substrate 30 described above, may be disposed on the first substrate 10. The thin-film encapsulation layer may include an inorganic encapsulation layer made of at least one inorganic material and an organic encapsulation layer made of at least one organic material. In one embodiment, the thin-film encapsulation layer may be provided as a stacked structure of a first inorganic encapsulation layer / organic encapsulation layer / second inorganic encapsulation layer.

[0217] Figure 15 and Figure 16 Each is a cross-sectional view illustrating a method for preparing a display device according to another embodiment.

[0218] In one or more implementation schemes, in Figure 10 Following the process shown in the diagram, the following steps will be taken. Figure 15 The process shown in the figure and Figure 16 The process is shown in the diagram. Then, as... Figure 13 As illustrated, on the intermediate layer 117 and the auxiliary layer 118, the second electrode 130 can be provided as a common electrode on the positive surface of the first substrate 10. More specifically, in Figure 10 After the process illustrated in the example, as Figure 15As shown, an auxiliary layer 118 can be provided on the third insulating film 14 exposed through the second opening 15b. Then, as... Figure 16 As shown, an intermediate layer 117 may be provided on the first electrode 116 exposed through the first opening 15a of the first pixel PX1.

[0219] Various modifications are possible as long as the second electrode 130 is formed after the auxiliary layer 118 is formed.

[0220] Display device 1 can be an electronic device 1000, such as a mobile phone, video phone, smartphone, smart tablet, smartwatch, desktop PC, laptop, computer monitor, television, digital broadcasting terminal, personal digital assistant (PDA), portable multimedia player (PMP), head-mounted display (HMD), car navigation, etc.

[0221] Figure 17 It is a block diagram that schematically illustrates the configuration of an electronic device according to an implementation scheme. Figure 18A and Figure 18B Each is a perspective view that schematically illustrates an electronic device according to the implementation scheme.

[0222] refer to Figure 17 The electronic device 1000 may include a processor 1010, memory 1020, storage 1030, input / output device 1040, power supply 1050, and display 1060. Here, the display 1060 may correspond to... Figure 1 The display device 1. The electronic device 1000 can communicate with graphics cards, sound cards, memory cards, USB devices, etc., or may further include various ports that can communicate with other systems.

[0223] In one implementation scheme, such as Figure 18A As shown, the electronic device 1000 can be implemented as a television. In one or more embodiments, such as Figure 18B As shown, the electronic device 1000 can be implemented as a smartphone. However, the embodiments of this disclosure are exemplary embodiments, and the electronic device 1000 is not limited thereto.

[0224] Then, refer to Figure 19 and Figure 20 The formation of the second electrode 130 with or without the auxiliary layer 118 will be described. The transmittance of each of Comparative Examples 1 to 3 and Examples 1 and 2 was measured at wavelengths from 300 nm to 1,000 nm.

[0225] The graph shown in Comparative Example 1 is the transmittance graph of Sample 1. Sample 1 is a glass substrate with a thickness of 0.5 mm. The graph shown in Comparative Example 2 is the transmittance graph of Sample 2. Sample 2 is a substrate on which a 9 nm thick AgMg thin film is formed by depositing AgMg (weight ratio = 10:1) on a glass substrate with a thickness of 0.5 mm. The graph shown in Example 1 is the transmittance graph of Sample 3. Sample 3 is a substrate prepared by forming an auxiliary layer to a thickness of 10 nm on a glass substrate and depositing AgMg on the auxiliary layer. The closer the transmittance graph is to Comparative Example 1, the less likely a second electrode has been formed.

[0226] refer to Figure 19 It was confirmed that the diagram of Example 1 was significantly closer to that of Comparative Example 1 than that of Comparative Example 2. Therefore, it was confirmed that a second electrode was essentially not formed by forming an auxiliary layer.

[0227] The graph shown in Comparative Example 3 is the transmittance graph of Sample 4. Sample 4 was prepared by forming a mixed electron transport layer with a thickness of 36 nm on a glass substrate with a thickness of 0.5 mm, and then forming a Yb thin film with a thickness of 1.3 nm. The graph shown in Example 2 is the transmittance graph of Sample 5. Sample 5 was prepared by forming a mixed electron transport layer with a thickness of 36 nm, an auxiliary layer with a thickness of 10 nm, and a Yb thin film with a thickness of 1.3 nm on a glass substrate with a thickness of 0.5 mm, and then depositing AgMg (weight ratio = 10:1). The closer the transmittance graph is to Comparative Example 3, the less likely a second electrode was formed.

[0228] refer to Figure 20 It was confirmed that the diagram of Example 2 is significantly closer to that of Comparative Example 3. Therefore, it was confirmed that a second electrode was essentially not formed by forming the auxiliary layer. Furthermore, the average transmittance of Example 2 was 87.15%, which is very similar to the average transmittance of Comparative Example 3 (i.e., 87.45%).

[0229] Then, refer to Figure 21A It was found that the second electrode formed on the auxiliary layer in Example 2 had a granular shape. Figure 21C yes Figure 21A A magnified view of a portion of the image.

[0230] According to various embodiments of this disclosure, a display device with relatively high transmittance and a method for manufacturing the display device can be provided when there is essentially no common electrode formed on the transmissive region.

[0231] It should be understood that the embodiments described herein should be considered for descriptive purposes only and not for limiting purposes. The description of features or aspects in each embodiment should generally be taken into account for other similar features or aspects in other embodiments.

[0232] Although one or more embodiments have been described with reference to the accompanying drawings, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope defined by the appended claims.

Claims

1. A display device, including: First substrate and display unit, The display unit includes a display area and a transmissive area. The display unit further includes: an auxiliary layer disposed only corresponding to the transmissive area; and a second electrode disposed only corresponding to the display area. The auxiliary layer comprises a first material. The second electrode comprises a second material, and The first material and the second material each satisfy the following inequality 1: <Inequality 1> ST2 - ST1 > 0 mJ / m 2 In inequality 1, ST1 is the surface energy of the first material at 25 °C, and ST2 is the surface energy of the second material at 25 °C.

2. The display device of claim 1, wherein the second electrode is not present in the transmissive region.

3. The display device as claimed in claim 1, wherein ST1 is greater than 0 mJ / m 2 And it is 30 mJ / m 2 or less than 30 mJ / m 2 .

4. The display device of claim 1, wherein the first material comprises 20 at% or more of fluorine.

5. The display device of claim 1, wherein the first material comprises a fluorinated silane compound, a fluorine-based polymer compound, or any combination thereof.

6. The display device of claim 1, wherein the second material comprises magnesium, silver, aluminum, lithium, calcium, indium, or any combination thereof.

7. A display device, including: First substrate and display unit, The display unit includes a display area and a transmissive area. The display unit further includes: an auxiliary layer disposed only corresponding to the transmissive region; and a second electrode disposed on the auxiliary layer corresponding to at least a portion of the display region and the transmissive region. The auxiliary layer comprises a first material. The second electrode comprises a second material, and The first material and the second material each satisfy the following inequality 1: <Inequality 1> ST2 - ST1 > 0 mJ / m 2 In inequality 1, ST1 is the surface energy of the first material at 25 °C, and ST2 is the surface energy of the second material at 25 °C.

8. The display device of claim 7, wherein the second electrode is disposed corresponding to the display area and all of the transmissive area. The first portion of the second electrode is disposed corresponding to the display area. The second portion of the second electrode is disposed corresponding to the transmission region, and The thicknesses of the first portion (T1) and the second portion (T2) each satisfy the following inequality 2: Inequality 2: T1 > T2.

9. The display device of claim 8, wherein T2 is greater than 0 nm and is 1 nm or less than 1 nm.

10. The display device of claim 7, wherein ST1 is greater than 0 mJ / m 2 And it is 30 mJ / m 2 or less than 30 mJ / m 2 .

11. The display device of claim 7, wherein the first material comprises 20 at% or more of fluorine.

12. The display device of claim 7, wherein the first material comprises a fluorinated silane compound, a fluorine-based polymer compound, or any combination thereof.

13. The display device of claim 7, wherein the second material comprises magnesium, silver, aluminum, lithium, calcium, indium, or any combination thereof.

14. The display device of claim 7, wherein the display device further comprises a first electrode and an intermediate layer, and The intermediate layer is disposed between the first electrode and the second electrode.

15. A display device, including: First substrate and display unit, The display unit includes a display area and a transmissive area. The display unit further includes: an auxiliary layer disposed corresponding to the transmissive region; and a second electrode disposed corresponding to at least a portion of the display region and the transmissive region. The auxiliary layer comprises a first material. The second electrode comprises a second material, and The first material and the second material each satisfy the following inequality 1: <Inequality 1> ST2 - ST1 > 0 mJ / m 2 In inequality 1, ST1 is the surface energy of the first material at 25 °C, and ST2 is the surface energy of the second material at 25 °C. A portion of the second electrode, which is disposed corresponding to a portion of the transmission region, contains a plurality of particles containing the second material.

16. The display device of claim 15, wherein the thickness of the portion of the second electrode disposed corresponding to the display area is greater than the average diameter of the plurality of particles.

17. A method for manufacturing a display device, the method comprising: Provide a first substrate; as well as A display unit is provided on the first substrate, wherein the display unit includes a display area and a transmissive area. The provision of the display unit includes: providing an auxiliary layer only on the transmissive region; and providing a second electrode on the display region or on both the display region and the transmissive region, wherein when the second electrode is provided on both the display region and the transmissive region, the second electrode is formed on the auxiliary layer; The auxiliary layer comprises a first material. The second electrode comprises a second material. The first material and the second material each satisfy the following inequality 1: <Inequality 1> ST2 - ST1 > 0 mJ / m 2 In inequality 1, ST1 is the surface energy of the first material at 25 °C, and ST2 is the surface energy of the second material at 25 °C.

18. The method of claim 17, wherein the second electrode is provided by depositing the second material using an open mask.

19. The method of claim 17, wherein the display device further comprises a first electrode and an intermediate layer. The intermediate layer is provided on the first electrode. The auxiliary layer is provided only on the transmissive region, and then, The second electrode is provided on the intermediate layer or on both the intermediate layer and the auxiliary layer.

20. The method of claim 17, wherein the display device further comprises a first electrode and an intermediate layer. The auxiliary layer is provided only on the transmission region, and then the intermediate layer is provided on the first electrode, and the second electrode is provided on the intermediate layer or on both the intermediate layer and the auxiliary layer.

21. A method for manufacturing a display device, the method comprising: Provide a first substrate; as well as A display unit is provided on the first substrate, wherein the display unit includes a display area and a transmissive area. The provision of the display unit includes: providing an auxiliary layer only on the transmissive region; and providing a second electrode on the display region or on both the display region and the transmissive region. The auxiliary layer comprises a first material. The second electrode comprises a second material. The first material and the second material each satisfy the following inequality 1: <Inequality 1> ST2 - ST1 > 0 mJ / m 2 In inequality 1, ST1 is the surface energy of the first material at 25 °C, and ST2 is the surface energy of the second material at 25 °C. A portion of the second electrode, which is disposed corresponding to a portion of the transmission region, contains a plurality of particles containing the second material. When a second electrode is provided on both the display area and the transmission area, the second electrode, which is disposed corresponding to the transmission area, contains a plurality of particles containing the second material.

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