Display Device And Method Of Fabricating The Same

Abstract

The present invention provides a display device comprising: a substrate having a display area having a plurality of first subpixels and a transparent area having a plurality of second subpixels and a plurality of transparent subpixels; a first electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper portion of the substrate; a first light-emitting auxiliary layer disposed on the upper portion of the first electrode; a light-emitting material layer disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper portion of the first light-emitting auxiliary layer; a second light-emitting auxiliary layer disposed on the upper portion of the light-emitting material layer; and a second electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper portion of the second light-emitting auxiliary layer, wherein the first and second electrodes are not disposed on the plurality of transparent subpixels, and the second light-emitting auxiliary layer is disposed on the portion of the plurality of first light-emitting auxiliary layers directly above the plurality of transparent subpixels.

Description

Technology Field

[0001] The present invention relates to a display device, and more particularly to a display device including a transparent area for an auxiliary device such as a camera or fingerprint sensor, and a method for manufacturing the same. Background Technology

[0002] Generally, a portable terminal refers to a portable terminal capable of transmitting and receiving voice, text, and video data via wireless communication, and flat panel displays such as organic light-emitting diode (OLED) displays can be used in portable terminals.

[0003] Recently, portable terminals including auxiliary devices such as cameras or fingerprint sensors for shooting or authentication have been proposed.

[0004] In such a portable terminal, the auxiliary device is placed on the back of the display panel, and in order for the auxiliary device to recognize an object on the front of the display panel, the part of the display panel corresponding to the auxiliary device must be a transparent area.

[0005] In addition, to reduce the bezel (non-display area) and expand the display area, a transparent area for auxiliary devices is placed inside the display area. In this case, after the display panel is completed, the substrate, array layer, light-emitting diode, encapsulation layer, polarization layer, etc. of the transparent area are removed through a cutting process such as laser trimming, thereby increasing the transmittance of the transparent area.

[0006] However, there is a problem in that the addition of a cutting process increases manufacturing costs and reduces productivity.

[0007] In addition, since the light-emitting diode and the encap layer placed on the upper part of the substrate are cut and removed, the sides of the light-emitting diode and the encap layer are exposed to the outside. Consequently, external oxygen or moisture enters through the exposed sides of the light-emitting diode and the encap layer, causing defects such as foreign matter.

[0008] To prevent this, grooves can be formed in the array layer beneath the light-emitting diodes to disconnect them; however, this leads to increased manufacturing costs and reduced productivity due to the groove formation process. The problem to be solved

[0009] The present invention is presented to solve these problems and aims to provide a display device including a transparent region and a method for manufacturing the same, wherein defects such as foreign matter are minimized, manufacturing costs are reduced, and productivity is improved by selectively forming a second electrode of a light-emitting diode in a display region excluding the transparent region using a deposition prevention layer.

[0010] Furthermore, another objective of the present invention is to provide a display device including a transparent area in which an image is displayed even in the transparent area, by selectively forming a second electrode of a light-emitting diode in a part of the display area and the transparent area using a deposition prevention layer, thereby minimizing defects such as foreign matter, reducing manufacturing costs, and improving productivity. means of solving the problem

[0011] To solve the above problem, the present invention provides a display device comprising: a substrate having a display area having a plurality of first subpixels and a transparent area having a plurality of second subpixels and a plurality of transparent subpixels; a first electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper surface of the substrate; a first light-emitting auxiliary layer disposed on the upper surface of the first electrode; a light-emitting material layer disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper surface of the first light-emitting auxiliary layer; a second light-emitting auxiliary layer disposed on the upper surface of the light-emitting material layer; and a second electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper surface of the second light-emitting auxiliary layer, wherein the first and second electrodes are not disposed on the plurality of transparent subpixels, and the second light-emitting auxiliary layer is disposed on the upper surface of the plurality of first light-emitting auxiliary layers of the plurality of transparent subpixels.

[0012] In addition, the first light-emitting auxiliary layer may include at least one of a hole injection layer and a hole transport layer above the first electrode, and the second light-emitting auxiliary layer may include at least one of an electron transport layer and an electron injection layer above the light-emitting material layer.

[0013] In addition, at least one of the plurality of second subpixels may be positioned between at least two of the plurality of transparent subpixels.

[0014] And, the plurality of second subpixels and the plurality of transparent subpixels can be alternately arranged in the transparent area.

[0015] In addition, the display device further includes an organic material layer disposed in the transparent area, and the second electrode and the organic material layer may be disposed in the same layer.

[0016] And, the organic material layer can be placed only in the transparent area.

[0017] In addition, the surface energy of the second light-emitting auxiliary layer may be greater than the surface energy of the organic material layer and smaller than the surface energy of the second electrode.

[0018] In addition, the second light-emitting auxiliary layer may have a surface energy of 0.5 J / m2 or more, the organic material layer may have a surface energy of 0.2 J / m2 or less, and the second electrode may have a surface energy of 0.5 J / m2 or more.

[0019] In addition, the organic material layer may have a glass transition temperature (Tg) of 40 degrees or less, a refractive index of 1.7 or more and a light absorption rate of 0.02 or less for light of a wavelength of 550 nm, and a thickness in the range of 20 Å to 300 Å.

[0020] In addition, the organic material layer may include an open-ring isomer diarylethene (DAE(diarylethene)1o) represented by the following chemical formula 1.

[0021] [Chemical Formula 1]

[0022]

[0023] In addition, the display device further includes an in-cap layer disposed on the upper portion of the second electrode, and the side portion of the second electrode may be in direct contact with the in-cap layer.

[0024] In addition, the display device may further include a color filter layer disposed on the upper part of the second electrode.

[0025] Additionally, the second light-emitting auxiliary layer may be disposed directly above the first light-emitting auxiliary layer between at least one of the plurality of first subpixels adjacent to the transparent area and at least one of the plurality of second subpixels adjacent to the display area.

[0026] In addition, the first and second light-emitting auxiliary layers may be disposed on the upper front surface of the substrate.

[0027] Additionally, the display device further includes an auxiliary device disposed in the transparent area below the substrate, and the auxiliary device may be a camera or a fingerprint sensor.

[0028] Meanwhile, the present invention provides a display device comprising: a substrate having a display area having a plurality of first subpixels and a transparent area having a plurality of second subpixels and a plurality of transparent subpixels; a first electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper surface of the substrate; a first light-emitting auxiliary layer disposed on the upper surface of the first electrode; a light-emitting material layer disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper surface of the first light-emitting auxiliary layer; a second light-emitting auxiliary layer disposed on the upper surface of the light-emitting material layer; and a second electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper surface of the second light-emitting auxiliary layer, wherein the first and second electrodes are not disposed on the plurality of transparent subpixels, and the distance between two adjacent second subpixels is greater than the distance between two adjacent first subpixels.

[0029] In addition, the display device may further include an array layer disposed between the substrate and the first electrode; and a touch layer disposed inside the array layer.

[0030] On the other hand, the present invention comprises: a substrate including a display area having a plurality of first subpixels and a transparent area having a plurality of second subpixels and a plurality of transparent subpixels; a first electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper surface of the substrate; a first light-emitting auxiliary layer disposed on the upper surface of the first electrode; a light-emitting material layer disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper surface of the first light-emitting auxiliary layer; a second light-emitting auxiliary layer disposed on the upper surface of the light-emitting material layer; and a second electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper surface of the second light-emitting auxiliary layer. The present invention provides a display device comprising an in-cap layer disposed on the upper portion of the second electrode, wherein the first and second electrodes are not disposed in the plurality of transparent subpixels, and the distance between the in-cap layer of at least one of the plurality of second subpixels and the substrate is greater than the distance between the in-cap layer of at least one of the plurality of transparent subpixels and the substrate.

[0031] In addition, the display device further includes a touch layer disposed on top of the incap layer, and the touch layer may be disposed continuously in the display area and the transparent area.

[0032] In addition, the display device further includes a polarizing layer disposed on top of the touch layer, and the size of the polarizing layer may be smaller than the size of the substrate.

[0033] In addition, the polarizing layer may have a film form with a size corresponding to the display area.

[0034] In addition, the display device further includes a non-reflective layer disposed in the transparent area, and the polarizing layer and the non-reflective layer may be disposed in the same layer.

[0035] And, the non-reflective layer can be spaced apart from the polarization layer. Effects of the invention

[0036] The present invention has the effect of minimizing defects such as foreign matter, reducing manufacturing costs, and improving productivity by selectively forming a second electrode of a light-emitting diode in a display area excluding a transparent area using a deposition prevention layer.

[0037] Furthermore, the present invention selectively forms a second electrode of a light-emitting diode in a portion of the display area and the transparent area using a deposition prevention layer, thereby minimizing defects such as foreign matter, reducing manufacturing costs, and improving productivity, as well as providing the effect of displaying an image even in the transparent area. Brief explanation of the drawing

[0038] FIG. 1 is a block diagram illustrating a display device according to a first embodiment of the present invention. FIG. 2 is a circuit diagram illustrating a subpixel of a display device according to the first embodiment of the present invention. FIG. 3 is a plan view illustrating a display device according to a first embodiment of the present invention. FIG. 4 is an enlarged plan view showing the boundary between the display area and the transparent area of ​​FIG. 1. FIG. 5 is a cross-sectional view along the cutting line VV of FIG. 4. FIGS. 6a to 6e are cross-sectional views illustrating a method for manufacturing a display device according to a first embodiment of the present invention. FIG. 7 is a diagram illustrating whether adsorption occurs according to the surface energy of a plurality of materials of a display device according to the first embodiment of the present invention. FIG. 8 is a diagram illustrating the behavior of a plurality of materials of a display device according to a first embodiment of the present invention. FIG. 9 is a graph showing the transmittance of a display device according to the first embodiment of the present invention. FIG. 10 is an enlarged plan view illustrating the boundary between the display area and the transparent area of ​​a display device according to a second embodiment of the present invention. FIG. 11 is a cross-sectional view along the cutting line XI-XI of FIG. 10. Specific details for implementing the invention

[0039] Hereinafter, a display device and a method for manufacturing the same according to the present invention will be described with reference to the attached drawings.

[0040] FIG. 1 is a block diagram illustrating a display device according to a first embodiment of the present invention, and FIG. 2 is a circuit diagram illustrating a subpixel of a display device according to a first embodiment of the present invention, and an organic light-emitting diode display device is used as an example for explanation.

[0041] As illustrated in FIG. 1, an organic light-emitting diode display device (110) according to the first embodiment of the present invention includes a timing control unit (180), a data driving unit (182), a gate driving unit (184), and a display panel (186).

[0042] The timing control unit (180) generates a gate control signal, a data control signal, and video data using a video signal transmitted from an external system such as a graphics card or a TV system and a plurality of timing signals, supplies the generated data control signal and video data to the data driving unit (182), and supplies the generated gate control signal to the gate driving unit (184).

[0043] The data driving unit (182) generates a data signal (data voltage) using a data control signal and image data supplied from the timing control unit (180), and supplies the generated data signal to the data wiring (DL) of the display panel (186).

[0044] The gate driving unit (184) generates a gate signal (gate voltage) using a gate control signal supplied from the timing control unit (180) and supplies the generated gate signal to the gate wiring (GL) of the display panel (186).

[0045] The display panel (186) displays an image using a gate signal and a data signal, and includes a gate wire (GL) and a data wire (DL) that intersect each other, and a subpixel (SP of FIG. 2) connected to the gate wire (GL) and the data wire (DL).

[0046] For example, a subpixel (SP) can be defined by a gate wire (GL) and a data wire (DL) that intersect each other, and may include red, green, and blue subpixels (SPr, SPg, SPb) corresponding to red, green, and blue, respectively.

[0047] The subpixel (SP) includes a plurality of thin-film transistors, for example, the subpixel (SP) may include a switching thin-film transistor, a driving thin-film transistor, a storage capacitor, and a light-emitting diode.

[0048] As illustrated in FIG. 2, the subpixel (SP) of the organic light-emitting diode display device (110) according to the first embodiment of the present invention includes a switching thin-film transistor (Ts), a driving thin-film transistor (Td), a storage capacitor (Cs), and a light-emitting diode (De).

[0049] The switching thin-film transistor (Ts) supplies the data signal of the data line (DL) to the driving thin-film transistor (Td) according to the gate signal of the gate line (GL), and the driving thin-film transistor (Td) supplies the high potential voltage (ELVDD) to the light-emitting diode (De) according to the data signal applied to the gate electrode through the switching thin-film transistor (Ts).

[0050] A light-emitting diode (DE) displays various gray levels by utilizing different currents based on the voltage difference between the data signal voltage and the low potential voltage (ELVSS).

[0051] FIG. 3 is a plan view illustrating a display device according to a first embodiment of the present invention, FIG. 4 is an enlarged plan view illustrating the boundary between the display area and the transparent area of ​​FIG. 3, and FIG. 5 is a cross-sectional view along the cutting line III-III of FIG. 4, and an organic light-emitting diode display device of an on-cell touch method and a top emission method is described as an example.

[0052] As illustrated in FIGS. 3, 4 and 5, a display device (110) according to the first embodiment of the present invention includes a display area (DA) used for image display and touch detection, a transparent area (TA) inside the display area (DA), and a non-display area (NDA) surrounding the display area (DA).

[0053] This display device (110) includes a display panel, a system unit (170), and an auxiliary device (172). The display panel transmits information to the user through image display and receives information from the user through touch detection. The system unit (170) transmits and receives signals and power to the display panel and the auxiliary device (172). The auxiliary device (172) can receive information such as the shape of an object through the display panel.

[0054] Specifically, the backplate (162) serves to support and protect the substrate (122), and can be made of a plastic such as polyethylene terephthalate (PET) and can have a refractive index of about 1.6.

[0055] A substrate (120) is disposed on the front surface of the upper part of the backplate (162), and a gate insulating layer (122), an interlayer insulating layer (124), and a protective layer (126) are disposed on the display area (DA) on the upper part of the substrate (120).

[0056] The substrate (120) includes a display area (DA) and a transparent area (TA), wherein the display area (DA) includes a plurality of first color subpixels such as red, green, and blue subpixels (SPr, SPg, SPb), and the transparent area (TA) is disposed inside the display area (DA).

[0057] The substrate (120) may be made of glass or a flexible material such as polyimide (PI) and may have a refractive index of about 1.6.

[0058] A number of thin-film transistors, such as a switching thin-film transistor (Ts in FIG. 2) and a driving thin-film transistor (Td in FIG. 2), and a storage capacitor (Cs in FIG. 2) may be disposed between the gate insulating layer (122), interlayer insulating layer (124), and protective layer (126) of each red, green, and blue subpixel (SPr, SPg, SPb).

[0059] For example, a gate insulating layer (122) may be disposed between the gate electrode and the semiconductor layer of the switching thin film transistor (Ts) and the driving thin film transistor (Td), an interlayer insulating layer (124) may be disposed between the gate electrode and the source electrode and drain electrode of the switching thin film transistor (Ts) and the driving thin film transistor (Td), and a protective layer (126) may be disposed on the source electrode and drain electrode of the switching thin film transistor (Ts) and the driving thin film transistor (Td).

[0060] A first electrode (128) is disposed on each of the red, green, and blue subpixels (SPr, SPg, SPb) on the upper part of the protective layer (126), and a first light-emitting auxiliary layer (130) is disposed on the front surface of the upper part of the first electrode (128).

[0061] The first electrode (126) may include a first layer of a metal material having a relatively large reflectance and a second layer of a transparent conductive material having a relatively large work function.

[0062] For example, the first electrode (128) may be an anode that supplies a hole to the light-emitting material layer (132) and may be connected to a driving thin-film transistor (Td).

[0063] The first light-emitting auxiliary layer (130) may include a hole injecting layer that injects a hole into the light-emitting material layer (132) and a hole transporting layer that transports a hole to the light-emitting material layer (132), and the hole injecting layer and the hole transporting layer may be sequentially disposed on the upper part of the first electrode (128).

[0064] An emitting material layer (132) is disposed on each of the red, green, and blue subpixels (SPr, SPg, SPb) on the upper part of the first emitting auxiliary layer (130), and a second emitting auxiliary layer (134) is disposed on the front surface of the upper part of the emitting material layer (132).

[0065] The light-emitting material layer (132) emits light by combining holes supplied from the first electrode (128) and electrons supplied from the second electrode (140).

[0066] In the first embodiment, the light-emitting material layer (132) of the red, green, and blue subpixels (SPr, SPg, SPb) is made of different materials and emits red, green, and blue light, respectively. However, in other embodiments, the light-emitting material layer (132) of the red, green, and blue subpixels (SPr, SPg, SPb) may have the same structure of the same material and emit white light, and in this case, a color filter layer may be placed on the upper part of the second electrode (140).

[0067] The second light-emitting auxiliary layer (134) may include an electron transporting layer that transfers electrons to the light-emitting material layer (132) and an electron injecting layer that injects electrons into the light-emitting material layer (132), and the electron transporting layer and the electron injecting layer may be sequentially disposed on top of the light-emitting material layer (132).

[0068] For example, the electron injection layer can have a thickness in the range of about 10 Å to about 40 Å.

[0069] The first and second light-emitting auxiliary layers (130, 134) may each have a refractive index of about 1.8.

[0070] In the first embodiment, the first and second light-emitting auxiliary layers (130, 134) of the same material are exemplified as being disposed on the front surface of the substrate (120), but in other embodiments, the first and second light-emitting auxiliary layers (130, 134) may be selectively disposed on red, green, and blue subpixels (SPr, SPg, SPb) using different materials.

[0071] A second electrode (140) and a deposition prevention layer (142) are respectively disposed in the display area (DA) and the transparent area (TA) above the second light-emitting auxiliary layer (134).

[0072] That is, the second electrode (140) is selectively placed in a portion where the deposition prevention layer (142) is not formed, and as a result, the second electrode (140) and the deposition prevention layer (142) can be placed exclusively from each other.

[0073] The second electrode (140) may be made of a metal material having semipermeability and a relatively small work function.

[0074] For example, the second electrode (140) may be a cathode that supplies electrons to the light-emitting material layer (132), the second electrode (140) may have a thickness in the range of about 100 Å to about 200 Å, and the second electrode (140) may be made of magnesium silver (MgAg).

[0075] The first electrode (128), the first light-emitting auxiliary layer (130), the light-emitting material layer (132), the second light-emitting auxiliary layer (134), and the second electrode (140) constitute a light-emitting diode.

[0076] The deposition prevention layer (142) may be made of an organic material having relatively small surface energy, and when the second electrode (140) is formed, the metal material for the second electrode (140) may be detached from the upper surface of the deposition prevention layer (142) without being adsorbed.

[0077] For example, the deposition prevention layer (142) may have a thickness in the range of about 20 Å to about 300 Å.

[0078] The deposition prevention layer (142) will be explained in detail later.

[0079] An encapsulation layer (150) is disposed on the front surface of the upper portion of the second electrode (140) and the deposition prevention layer (142), and a touch layer (152) is disposed on the front surface of the upper portion of the encapsulation layer (150).

[0080] The incap layer (150) serves to prevent external oxygen or moisture penetration and may include a plurality of organic material layers and a plurality of inorganic material layers and may have a refractive index of about 1.8.

[0081] The touch layer (152) serves to detect touch and may include a plurality of touch electrodes and an insulating layer, and the insulating layer may have a refractive index of about 1.5.

[0082] In the first embodiment, the touch layer (152) is exemplified as being placed on top of the incap layer (150), but in other embodiments, the touch layer (152) may be placed inside the array layer (122) or omitted.

[0083] A polarizing layer (154) is disposed in the display area (DA) above the touch layer (152), and an adhesive layer (156) is disposed in the display area (DA) above the polarizing layer (154).

[0084] The polarization layer (154) serves to minimize external light being reflected from the array layer (122) and the light-emitting diode and emitted back out, and may include a quarter-wavelength layer and a linear polarization layer sequentially disposed on top of the touch layer (152).

[0085] A cover glass (160) is placed on the front surface of the upper part of the adhesive layer (156), and the cover glass (160) serves to protect the touch layer (152), the light-emitting diode, and a plurality of thin-film transistors.

[0086] A backplate (162), a substrate (120), a plurality of thin-film transistors, light-emitting diodes, and a cover glass (160) constitute a display panel.

[0087] A system unit (170) and an auxiliary device (172) are respectively placed in the display area (DA) and the transparent area (TA) below the backplate (162).

[0088] In the display device (110) according to the first embodiment of the present invention, instead of removing the light-emitting diode and the encap layer (150) of the transparent region (TA) through a cutting process such as laser trimming, the second electrode (140) of the light-emitting diode is selectively formed in the display region (DA) using a deposition prevention layer (142), thereby preventing the side of the light-emitting diode and the encap layer (150) from being exposed to the outside, and as a result, the inflow of external oxygen or moisture is minimized and defects such as foreign matter are minimized.

[0089] In addition, by omitting cutting processes such as laser trimming and groove forming processes, the manufacturing process is simplified, manufacturing costs are reduced, and productivity is improved.

[0090] A method for manufacturing such a display device (110) is described with reference to the drawings.

[0091] FIGS. 6a to 6e are cross-sectional views illustrating a method for manufacturing a display device according to a first embodiment of the present invention, FIG. 7 is a diagram illustrating adsorption according to the surface energy of a plurality of materials of a display device according to a first embodiment of the present invention, and FIG. 8 is a diagram illustrating the behavior of a plurality of materials of a display device according to a first embodiment of the present invention, and these are explained with reference to FIGS. 1 to 5 together.

[0092] As shown in FIG. 6a, a gate insulating layer (122), an interlayer insulating layer (124), and a protective layer (126) are formed in the display area (DA) on the upper part of the substrate (120), and a first electrode (128) is formed in each of the red, green, and blue subpixels (SPr, SPg, SPb) on the upper part of the protective layer (126).

[0093] A number of thin-film transistors, such as a switching thin-film transistor (Ts in FIG. 2) and a driving thin-film transistor (Td in FIG. 2), and a storage capacitor (Cs in FIG. 2) may be disposed between the gate insulating layer (122), the interlayer insulating layer (124), and the protective layer (126).

[0094] A plurality of thin-film transistors and a first electrode (124) can be formed through a photolithography process.

[0095] Subsequently, a first light-emitting auxiliary layer (130) is formed on the front surface of the substrate (120) above the first electrode, a light-emitting material layer (132) is formed on each of the red, green, and blue subpixels (SPr, SPg, SPb) above the first light-emitting auxiliary layer (130), and a second light-emitting auxiliary layer (134) is formed on the front surface of the substrate (120) above the light-emitting material layer (132).

[0096] The first light-emitting auxiliary layer (130), the light-emitting material layer (132), and the second light-emitting auxiliary layer (134) can be formed through a thermal evaporation process using a shadow mask such as a fine metal mask.

[0097] At this time, an electron injection layer of the second light-emitting auxiliary layer (134) can be formed on the uppermost surface of the substrate (120).

[0098] Metallic materials for electron injection layers can have relatively high surface energy; for example, metallic materials for electron injection layers have approximately 0.5 J / m² 2 It can have surface energy greater than that.

[0099] Metal materials for electron injection layers may have a relatively low melting point so that deposition is possible at a relatively low temperature; for example, metal materials for electron injection layers may have a melting point of about 1000 degrees or less.

[0100] Metallic materials for the electron injection layer can have relatively high electrical conductivity; for example, the metallic material for the electron injection layer is approximately 4.0 x 10⁻⁶. 6-1 m -1 It can have electrical conductivity greater than that.

[0101] Metal materials for electron injection layers can have a relatively small work function, for example, metal materials for electron injection layers can have a work function in the range of about 2.4 eV to about 2.8 eV.

[0102] The electron injection layer can have a thickness in the range of about 10 Å to about 40 Å and can be formed at a deposition rate of about 0.05 Å / sec or higher.

[0103] As shown in FIG. 6b, a shadow mask (144) having a blocking portion (SA) and an opening (OA) is placed on top of the second light-emitting auxiliary layer (134), and an organic material is deposited on top of the second light-emitting auxiliary layer (134) through the opening (OA).

[0104] Accordingly, a deposition prevention layer (142) is formed in the transparent area (TA) above the second light-emitting auxiliary layer (134), and the second light-emitting auxiliary layer (134) of the display area (DA) is exposed.

[0105] Here, the shadow mask (144) can be aligned so that the blocking part (SA) and the opening (OA) correspond to the display area (DA) and the transparent area (TA), respectively.

[0106] The organic material for the deposition prevention layer (142) may have a relatively small surface energy and a relatively low glass transition temperature (Tg), for example, the organic material for the deposition prevention layer (142) may have about 0.2 J / m 2 It can have a surface energy of less than or equal to and a glass transition temperature (Tg) of about 40 degrees or less.

[0107] The organic material for the deposition prevention layer (142) may have a relatively large refractive index and a relatively small light absorption rate. For example, the organic material for the deposition prevention layer (142) may have a refractive index of about 1.7 or more and a light absorption rate of about 0.02 or less for light of a wavelength of about 550 nm.

[0108] The organic material for the deposition prevention layer (142) may be a material capable of patterning using a shadow mask (144), for example, a material capable of forming a pattern corresponding to a pixel with a resolution of about 300 ppi through the shadow mask (144) may be used as the organic material for the deposition prevention layer (142).

[0109] The organic material for the deposition prevention layer (142) can have relatively high high-temperature storage reliability, for example, the organic material for the deposition prevention layer (142) can be determined so that no defects occur even when the deposition prevention layer (142) with a thickness of about 300 Å is placed at a temperature of about 100 degrees for about 500 hours or more.

[0110] The deposition prevention layer (142) may have a thickness in the range of about 20 Å to about 300 Å.

[0111] The organic material for the deposition prevention layer (142) may be a material different from organic insulating materials such as photoacryl and polyimide used in the gate insulating layer (122), interlayer insulating layer (124), and protective layer (126), or inorganic insulating materials such as silicon nitride (SiNx), silicon oxide (SiO2), and silicon oxynitride (SiON).

[0112] That is, the organic insulating material and inorganic insulating material used in the gate insulating layer (122), interlayer insulating layer (124), and protective layer (126) can be patterned through a photolithography process, whereas the organic material for the deposition prevention layer (142) cannot be patterned through a photolithography process and can be patterned through a thermal evaporation process using a shadow mask.

[0113] For example, the organic material for the deposition prevention layer (142) may be an open-ring isomer diarylethene (DAE(diarylethene)1o) represented by the following chemical formula 1.

[0114] [Chemical Formula 1]

[0115]

[0116] As shown in FIG. 6c, a metal material is deposited on the upper part of the second light-emitting auxiliary layer (134) of the display area (DA) and on the upper part of the deposition prevention layer (142) of the transparent area (TA).

[0117] At this time, the metal material atoms (146) are not adsorbed but desorbed on the deposition prevention layer (142) of the transparent region (TA), and are selectively adsorbed on the second light-emitting auxiliary layer (134) of the display region (DA), so that the second electrode (140) is selectively formed in the display region (DA).

[0118] The metal material for the second electrode (140) may have a relatively large surface energy, for example, the metal material for the second electrode (140) may have about 0.5 J / m 2 It can have surface energy greater than that.

[0119] In particular, the metal material for the second electrode (140) can have a larger surface energy than the metal material for the electron injection layer of the second light-emitting auxiliary layer (130).

[0120] The metal material for the second electrode (140) may have a relatively low melting point so that deposition is possible at a relatively low temperature, for example, the metal material for the second electrode (140) may have a melting point of about 1000 degrees or less.

[0121] The metal material for the second electrode (140) may have a relatively high electrical conductivity, for example, the metal material for the second electrode (140) may be about 1.0 * 10 7-1 m -1 It can have electrical conductivity greater than that.

[0122] The metal material for the second electrode (140) may have a relatively small refractive index and a relatively small light absorption rate. For example, the metal material for the second electrode (140) may have a refractive index of about 1.0 and a light absorption rate of about 5.5 or less for light of a wavelength of about 550 nm.

[0123] The second electrode (140) may have a thickness in the range of about 100 Å to about 200 Å and may be formed with a deposition rate in the range of about 0.1 Å / sec to about 100 Å / sec.

[0124] As illustrated in FIGS. 7 and 8, the metal material for the electron injection layer of the second light-emitting auxiliary layer (134), the organic material for the deposition prevention layer (142), and the metal material for the second electrode (140) each have first, second, and third surface energies (SE1, SE2, SE3), wherein the first surface energy (SE1) may be greater than the second surface energy (SE2) and smaller than the third surface energy (SE3). (SE2 < SE1 < SE3)

[0125] Here, the deposition prevention layer (142) is made of an organic material having a relatively small second surface energy (SE2) and a relatively low glass transition temperature, so the deposition prevention layer (142) has active surface molecular motion.

[0126] Accordingly, the metal material atoms (146) for the second electrode (140) having a relatively large third surface energy (SE3) are not adsorbed on the surface of the deposition prevention layer (142) having a relatively small second surface energy (SE2) and a relatively low glass transition temperature in the transparent region (TA), and are desorbed and then move to the display region (DA).

[0127] And, a metal material atom (146) for the second electrode (140) having a relatively large third surface energy (SE3) is selectively adsorbed onto the surface of the electron injection layer of the second light-emitting auxiliary layer (130) having a relatively large first surface energy (SE1) in the display area (DA), and nucleation proceeds, and the metal material atom (146) for the second electrode (140) is gradually accumulated using the nucleus as a seed, and the second electrode (140) is selectively formed in the display area (DA).

[0128] In the first embodiment, the second electrode (140) is selectively formed in the display area (DA) by controlling the surface energy of the metal material for the electron injection layer of the second light-emitting auxiliary layer (134), the organic material for the deposition prevention layer (142), and the metal material for the second electrode (140). However, in other embodiments, the second electrode (140) may be selectively formed in the display area (DA) by controlling the deposition temperature, deposition rate, etc. of the metal material for the electron injection layer of the second light-emitting auxiliary layer (134), the organic material for the deposition prevention layer (142), and the metal material for the second electrode (140).

[0129] As shown in FIG. 6d, an incap layer (150) is formed on the front surface of the substrate (120) above the second electrode (140) and the deposition prevention layer (142), and a touch layer (152) is formed on the front surface of the substrate (120) above the incap layer (150).

[0130] Subsequently, a polarizing layer (154) is formed on the display area (DA) above the incap layer (150). For example, the polarizing layer (154) can be formed in the form of a film corresponding to the size of the display area (DA) and attached to the upper part of the incap layer (150) of the display area (DA).

[0131] Afterwards, an adhesive layer (156) is formed on the display area (DA) above the polarization layer (154), and a cover glass (160) is formed on the front surface of the substrate (120) above the adhesive layer (156).

[0132] For example, the cover glass (160) can be attached to the polarizing layer (154) using the adhesive layer (156).

[0133] Afterwards, a backplate (162) is formed on the front surface of the lower part of the substrate (120).

[0134] For example, a substrate (120) including a cover glass (160) can be attached to a backplate (162) using an adhesive layer.

[0135] As shown in FIG. 6e, a system unit (170) and an auxiliary device (172) are respectively placed in the display area (DA) and the transparent area (TA) below the backplate (162).

[0136] In the method of manufacturing a display device (110) according to the first embodiment of the present invention, instead of removing the light-emitting diode and the in-cap layer (150) of the transparent region (TA) through a cutting process such as laser trimming, the metal material for the second electrode (140) is not adsorbed to the deposition prevention layer (142) of the transparent region (TA) but is adsorbed only to the second light-emitting auxiliary layer (1340) of the display region (DA), thereby allowing the second electrode (140) of the light-emitting diode to be selectively formed in the display region (DA) so that the side of the light-emitting diode and the in-cap layer (150) is not exposed to the outside, and as a result, the inflow of external oxygen or moisture is minimized and defects such as foreign matter are minimized.

[0137] In addition, by omitting cutting processes such as laser trimming and groove forming processes, the manufacturing process is simplified, manufacturing costs are reduced, and productivity is improved.

[0138] FIG. 9 is a graph showing the transmittance of a display device according to the first embodiment of the present invention, which shows the transmittance of a display device with the cover glass (160) omitted, and is explained with reference to FIG. 1 to FIG. 8.

[0139] As illustrated in FIG. 9, in the display device (110) according to the first embodiment of the present invention, a second electrode (140) is formed in the display area (DA) by the deposition prevention layer (142), and a second electrode (140) is not formed in the transparent area (TA).

[0140] In the display device according to the comparative example, a second electrode (140) having semi-transparent properties is formed in the display area (DA) and the transparent area (TA).

[0141] Here, the second electrode (140) is made of magnesium silver (MgAg) and has a thickness of about 140 Å.

[0142] The transparent region (TA) of the display device (110) of the first embodiment has a greater transmittance than the transparent region (TA) of the display device of the comparative example for light with a wavelength in the range of about 400 nm to about 800 nm.

[0143] Specifically, the transparent region (TA) of the display device (110) of the first embodiment has an intensity of approximately 107.6%, approximately 107.2%, and approximately 108.0% for light of wavelengths of approximately 430 nm, approximately 550 nm, and approximately 620 nm, respectively, whereas the transparent region (TA) of the display device of the comparative example has an intensity of approximately 75.7%, approximately 75.8%, and approximately 63.2% for light of wavelengths of approximately 430 nm, approximately 550 nm, and approximately 620 nm, respectively.

[0144] That is, the transparent area (TA) of the display device (110) of the first embodiment has a transmittance of at least 30% greater than the transparent area (TA) of the display device of the comparative example, and as a result, the brightness is improved.

[0145] In addition, since the transparent region (TA) of the display device (110) of the first embodiment has a uniform high transmittance across the entire wavelength range, defects such as color shift are minimized.

[0146] Meanwhile, the transparent region (TA) of the display device (110) of the first embodiment including the cover glass (160) has an intensity of approximately 97.6%, approximately 97.2%, and approximately 98.0% for light of wavelengths of approximately 430 nm, approximately 550 nm, and approximately 620 nm, respectively, whereas the transparent region (TA) of the display device of the comparative example including the cover glass (160) has an intensity of approximately 76.7%, approximately 65.8%, and approximately 53.2% for light of wavelengths of approximately 430 nm, approximately 550 nm, and approximately 620 nm, respectively.

[0147] As described above, in the display device (110) according to the first embodiment of the present invention, instead of removing the light-emitting diode and the in-cap layer (150) of the transparent region (TA) through a cutting process such as laser trimming, the metal material for the second electrode (140) is not adsorbed on the deposition prevention layer (142) of the transparent region (TA) but is adsorbed only on the second light-emitting auxiliary layer (134) of the display region (DA), thereby allowing the second electrode (140) of the light-emitting diode to be selectively formed in the display region (DA) so that the side of the light-emitting diode and the in-cap layer (150) is not exposed to the outside.

[0148] Accordingly, the influx of external oxygen or moisture is minimized, and defects such as foreign matter are minimized.

[0149] For example, in a comparative example, a display device in which the light-emitting diode and the encap layer (150) of the transparent area (TA) are removed through a cutting process such as laser trimming, moisture permeability failures occur in a bundle within 200 hours in a preservation reliability test at a temperature of about 85 degrees and a humidity of about 85%, whereas in a first embodiment, a display device (110) in which the second electrode (140) is selectively formed in the display area (DA) using a deposition prevention layer (142) does not experience any moisture permeability failures for up to 408 hours in a preservation reliability test at a temperature of about 85 degrees and a humidity of about 85%.

[0150] In addition, by omitting cutting processes such as laser trimming and groove forming processes, the manufacturing process is simplified, manufacturing costs are reduced, and productivity is improved.

[0151] In addition, since the transparent region (TA) has uniform high transmittance across the entire wavelength range, brightness is improved and defects such as color shift are minimized.

[0152] Meanwhile, in another embodiment, color subpixels such as red, green, and blue subpixels (SPr, SPg, SPb) can be placed in a part of the transparent area (TA) to improve the display quality of the image, which will be explained with reference to the drawings.

[0153] FIG. 10 is an enlarged plan view illustrating the boundary between the display area and the transparent area of ​​a display device according to a second embodiment of the present invention, and FIG. 11 is a cross-sectional view along the cutting line XI-XI of FIG. 9, and an organic light-emitting diode display device of an on-cell touch method and a top emission method is described as an example.

[0154] As illustrated in FIG. 10 and FIG. 11, a display device (210) according to a second embodiment of the present invention includes a display area (DA) used for image display and touch detection, a transparent area (TA) inside the display area (DA), and a non-display area (not shown) surrounding the display area (DA).

[0155] This display device (210) includes a display panel, a system unit (270), and an auxiliary device (272). The display panel transmits information to the user through image display and receives information from the user through touch detection. The system unit (270) transmits and receives signals and power to the display panel and the auxiliary device (272). The auxiliary device (272) can receive information such as the shape of an object through the display panel.

[0156] Specifically, the backplate (262) serves to support and protect the substrate (222), and can be made of a plastic such as polyethylene terephthalate (PET) and can have a refractive index of about 1.6.

[0157] A substrate (220) is disposed on the front surface of the upper part of the backplate (262), and a gate insulating layer (222), an interlayer insulating layer (224), and a protective layer (226) are disposed on a plurality of first color subpixels of the display area (DA) and a plurality of second color subpixels of the transparent area (TA) on the upper part of the substrate (220).

[0158] A substrate (220) includes a display area (DA) and a transparent area (TA). The display area (DA) includes a plurality of first color subpixels such as red, green, and blue subpixels (SPr, SPg, SPb). The transparent area (TA), which is placed inside the display area (DA), includes a plurality of second color subpixels such as red, green, and blue subpixels (SPr, SPg, SPb) and a plurality of transparent subpixels (SPt) that are alternately placed with the plurality of second color subpixels.

[0159] In the second embodiment, the red, green, and blue subpixels (SPr, SPg, SPb) of the second color subpixels of the transparent area (TA) and the transparent subpixels (SPt) are alternately arranged in a 1:1 horizontal direction, but in other embodiments, the red, green, and blue subpixels (SPr, SPg, SPb) of the second color subpixels of the transparent area (TA) and the transparent subpixels (SPt) may be alternately arranged in a 1:many ratio.

[0160] For example, multiple red, green, and blue subpixels (SPr, SPg, SPb) of multiple second color subpixels of a transparent area (TA) and multiple transparent subpixels (SPt) are arranged alternately in a 1:3 ratio, so that the transparent area (TA) can have an aperture ratio of about 75%.

[0161] The substrate (220) may be made of glass or a flexible material such as polyimide (PI) and may have a refractive index of about 1.6.

[0162] A number of thin-film transistors, such as a switching thin-film transistor (Ts in FIG. 2) and a driving thin-film transistor (Td in FIG. 2), and a storage capacitor (Cs in FIG. 2) may be disposed between the gate insulating layer (222), interlayer insulating layer (224), and protective layer (226) of each of the red, green, and blue subpixels (SPr, SPg, SPb).

[0163] For example, a gate insulating layer (222) may be disposed between the gate electrode of a switching thin film transistor (Ts) and a driving thin film transistor (Td) and a semiconductor layer, an interlayer insulating layer (224) may be disposed between the gate electrode of a switching thin film transistor (Ts) and a driving thin film transistor (Td) and a source electrode and a drain electrode, and a protective layer (226) may be disposed on the source electrode and a drain electrode of a switching thin film transistor (Ts) and a driving thin film transistor (Td).

[0164] A first electrode (228) is disposed in each of the red, green, and blue subpixels (SPr, SPg, SPb) of the display area (DA) and transparent area (TA) above the protective layer (226), and a first light-emitting auxiliary layer (230) is disposed on the front surface above the first electrode (228).

[0165] The first electrode (228) may include a first layer of a metallic material having a relatively large reflectance and a second layer of a transparent conductive material having a relatively large work function.

[0166] For example, the first electrode (228) may be an anode that supplies a hole to the light-emitting material layer (232) and may be connected to a driving thin-film transistor.

[0167] The first light-emitting auxiliary layer (230) may include a hole injecting layer that injects a hole into the light-emitting material layer (232) and a hole transporting layer that transports a hole to the light-emitting material layer (228), and the hole injecting layer and the hole transporting layer may be sequentially disposed on the upper part of the first electrode (228).

[0168] An emitting material layer (232) is disposed in each of the red, green, and blue subpixels (SPr, SPg, SPb) of the display area (DA) and transparent area (TA) above the first emitting auxiliary layer (230), and a second emitting auxiliary layer (234) is disposed on the front surface above the emitting material layer (232).

[0169] The light-emitting material layer (232) emits light by combining holes supplied from the first electrode (228) and electrons supplied from the second electrode (240).

[0170] In the second embodiment, the light-emitting material layer (232) of the red, green, and blue subpixels (SPr, SPg, SPb) of the display area (DA) and the transparent area (TA) is made of different materials and emits red, green, and blue light, respectively. However, in other embodiments, the light-emitting material layer (232) of the red, green, and blue subpixels (SPr, SPg, SPb) of the display area (DA) and the transparent area (TA) may have the same structure of the same material and emit white light, and in this case, a color filter layer may be placed on the upper part of the second electrode (240).

[0171] The second light-emitting auxiliary layer (234) may include an electron transporting layer that transfers electrons to the light-emitting material layer (232) and an electron injecting layer that injects electrons into the light-emitting material layer (232), and the electron transporting layer and the electron injecting layer may be sequentially disposed on top of the light-emitting material layer (232).

[0172] For example, the electron injection layer can have a thickness in the range of about 10 Å to about 40 Å.

[0173] The first and second light-emitting auxiliary layers (230, 234) may each have a refractive index of about 1.8.

[0174] In the second embodiment, the first and second light-emitting auxiliary layers (230, 234) of the same material are exemplified as being placed on the front surface of the substrate (220), but in other embodiments, the first and second light-emitting auxiliary layers (230, 234) may be selectively placed on the red, green, and blue subpixels (SPr, SPg, SPb) of the display area (DA) and transparent area (TA) using different materials.

[0175] A second electrode (240) is disposed in the red, green, and blue subpixels (SPr, SPg, SPb) of the display area (DA) and transparent area (TA) above the second light-emitting auxiliary layer (234), and a deposition prevention layer (242) is disposed in the plurality of transparent subpixels (SPt) of the transparent area (TA) above the second light-emitting auxiliary layer (234).

[0176] That is, the second electrode (240) is selectively placed in a portion where the deposition prevention layer (242) is not formed, and as a result, the second electrode (240) and the deposition prevention layer (242) can be placed exclusively from each other.

[0177] The second electrode (240) may be made of a metal material having semipermeability and a relatively small work function.

[0178] For example, the second electrode (240) may be a cathode that supplies electrons to the light-emitting material layer (232), the second electrode (240) may have a thickness in the range of about 100 Å to about 200 Å, and the second electrode (240) may be made of magnesium silver (MgAg).

[0179] The first electrode (224), the first light-emitting auxiliary layer (230), the light-emitting material layer (232), the second light-emitting auxiliary layer (234), and the second electrode (240) constitute a light-emitting diode.

[0180] The deposition prevention layer (242) may be made of an organic material having relatively small surface energy, and when the second electrode (240) is formed, the metal material for the second electrode (240) may be detached from the upper surface of the deposition prevention layer (242) without being adsorbed.

[0181] For example, the deposition prevention layer (242) may have a thickness in the range of about 20 Å to about 300 Å.

[0182] The deposition prevention layer (242) can be formed using the same material as in the first embodiment through the same process.

[0183] Here, since a second electrode (240) is not formed on a plurality of transparent subpixels (SPt) of the transparent region (TA) and a deposition prevention layer (242) is formed, the transmittance of the transparent region (TA) is improved.

[0184] For example, a plurality of transparent subpixels (SPt) of a transparent area (TA) have a transmittance of about 94% and the transparent area (TA) has an aperture ratio of about 75%, so that the transparent area (TA) with the non-reflective layer (258) omitted has a transmittance of about 71% and the transparent area (TA) with the non-reflective layer (258) formed has a transmittance of about 75%.

[0185] An encapsulation layer (250) is disposed on the front surface of the upper portion of the second electrode (240) and the deposition prevention layer (242), and a touch layer (252) is disposed on the front surface of the upper portion of the encapsulation layer (250).

[0186] The incap layer (250) serves to prevent external oxygen or moisture penetration and may include a plurality of organic material layers and a plurality of inorganic material layers and may have a refractive index of about 1.8.

[0187] The touch layer (252) serves to detect touch and may include a plurality of touch electrodes and an insulating layer, and the insulating layer may have a refractive index of about 1.5.

[0188] In the second embodiment, the touch layer (252) is exemplified as being placed on top of the incap layer (250), but in other embodiments, the touch layer (252) may be placed inside the array layer (222) or omitted.

[0189] A polarizing layer (254) is disposed in the display area (DA) above the touch layer (252), and an adhesive layer (256) is disposed in the display area (DA) above the polarizing layer (254).

[0190] The polarization layer (254) serves to minimize external light being reflected from a plurality of thin-film transistors and light-emitting diodes and emitted back outward, and may include a quarter-wavelength layer and a linear polarization layer sequentially disposed on top of the touch layer (252).

[0191] A non-reflective layer (258) is disposed in the transparent area (TA) above the touch layer (252).

[0192] The non-reflective layer (258) controls interference caused by reflection at the interface with the touch layer (252) to increase the transmittance of external light.

[0193] In other embodiments, the non-reflective layer (258) may be omitted.

[0194] A cover glass (260) is placed on the front surface of the upper part of the adhesive layer (256), and the cover glass (260) serves to protect the touch layer (252), the light-emitting diode, and the array layer (222).

[0195] A backplate (262), a substrate (220), a plurality of thin-film transistors, light-emitting diodes, and a cover glass (260) constitute a display panel.

[0196] A system unit (270) and an auxiliary device (272) are respectively placed in the display area (DA) and the transparent area (TA) below the backplate (262).

[0197] In the display device (210) according to the second embodiment of the present invention, instead of removing the light-emitting diode and the encap layer (250) of the transparent area (TA) through a cutting process such as laser trimming, the second electrode (240) of the light-emitting diode is selectively formed on a plurality of first color subpixels of the display area (DA) and a plurality of second color subpixels of the transparent area (TA) using a deposition prevention layer (242), thereby preventing the sides of the light-emitting diode and the encap layer (250) from being exposed to the outside, and as a result, the inflow of external oxygen or moisture is minimized and defects such as foreign matter are minimized.

[0198] In addition, by omitting cutting processes such as laser trimming and groove forming processes, the manufacturing process is simplified, manufacturing costs are reduced, and productivity is improved.

[0199] In addition, by arranging a plurality of second color subpixels in the transparent area (TA), the display area of ​​the display device (210) is expanded and the display quality of the image is improved.

[0200] In addition, by arranging a light-emitting diode including a second electrode (240) having semi-transparent properties in a plurality of second color subpixels in a transparent area (TA), the color reproduction rate is improved and the lifespan is increased due to the microcavity effect.

[0201] In addition, since a second electrode (240) is not formed on a plurality of transparent subpixels (SPt) of the transparent region (TA) and a deposition prevention layer (242) is formed, the transmittance of the transparent region (TA) is improved.

[0202] Although the present invention has been described above with reference to preferred embodiments, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the technical spirit and scope of the invention as described in the following claims. Explanation of the symbols

[0203] 110: Display device 120: Substrate 122: Array layer 124: First electrode 126: First light-emitting auxiliary layer 128: Light-emitting material layer 130: Second light-emitting auxiliary layer 140: Second electrode 142: Anti-deposition layer

Claims

Claim 1 A display device comprising: a substrate including a display area having a plurality of first subpixels and a transparent area having a plurality of second subpixels and a plurality of transparent subpixels; a first electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper portion of the substrate; a first light-emitting auxiliary layer disposed on the upper portion of the first electrode; a light-emitting material layer disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper portion of the first light-emitting auxiliary layer; a second light-emitting auxiliary layer disposed on the upper portion of the light-emitting material layer; a second electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper portion of the second light-emitting auxiliary layer; and an organic material layer disposed on the transparent area, wherein the first and second electrodes are not disposed on the plurality of transparent subpixels, the second light-emitting auxiliary layer is disposed on the portion directly above the plurality of first light-emitting auxiliary layers of the plurality of transparent subpixels, and the second electrode and the organic material layer are disposed on the same layer. Claim 2 A display device according to claim 1, wherein the first light-emitting auxiliary layer comprises at least one of a hole injection layer and a hole transport layer above the first electrode, and the second light-emitting auxiliary layer comprises at least one of an electron transport layer and an electron injection layer above the light-emitting material layer. Claim 3 In claim 1, a display device wherein at least one of the plurality of second subpixels is disposed between at least two of the plurality of transparent subpixels. Claim 4 In claim 3, the plurality of second subpixels and the plurality of transparent subpixels are alternately arranged in the transparent area. Claim 5 delete Claim 6 In claim 1, the organic material layer is disposed only in the transparent area of ​​the display device. Claim 7 A display device according to claim 1, wherein the surface energy of the second light-emitting auxiliary layer is greater than the surface energy of the organic material layer and smaller than the surface energy of the second electrode. Claim 8 In claim 7, the second light-emitting auxiliary layer is 0.5 J / m 2 Having a surface energy greater than or equal to 0.2 J / m², the organic material layer has a surface energy greater than or equal to 0.2 J / m² 2 Having a surface energy of the following, the second electrode is 0.5 J / m 2 A display device having surface energy greater than or equal to the above. Claim 9 A display device according to claim 1, wherein the organic material layer has a glass transition temperature (Tg) of 40 degrees or less, a refractive index of 1.7 or more and a light absorption rate of 0.02 or less for light of a wavelength of 550 nm, and a thickness in the range of 20 Å to 300 Å. Claim 10 In claim 1, the organic material layer comprises an open-ring isomer diarylethene (DAE(diarylethene)1o) represented by the following chemical formula 1, in a display device. [Chemical Formula 1] Claim 11 A display device according to claim 1, further comprising an in-cap layer disposed on the upper portion of the second electrode, wherein the side portion of the second electrode is in direct contact with the in-cap layer. Claim 12 A display device according to claim 1, further comprising a color filter layer disposed on the upper part of the second electrode. Claim 13 A display device according to claim 1, wherein the second light-emitting auxiliary layer is disposed directly above the first light-emitting auxiliary layer between at least one of the plurality of first subpixels adjacent to the transparent region and at least one of the plurality of second subpixels adjacent to the display region. Claim 14 In claim 1, the first and second light-emitting auxiliary layers are a display device disposed on the upper front surface of the substrate. Claim 15 A display device according to claim 1, further comprising an auxiliary device disposed in the transparent area below the substrate, wherein the auxiliary device is a camera or a fingerprint sensor. Claim 16 A substrate comprising a display area having a plurality of first subpixels and a transparent area having a plurality of second subpixels and a plurality of transparent subpixels; a first electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper portion of the substrate; a first light-emitting auxiliary layer disposed on the upper portion of the first electrode; a light-emitting material layer disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper portion of the first light-emitting auxiliary layer; a second light-emitting auxiliary layer disposed on the upper portion of the light-emitting material layer; and a second electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the upper portion of the second light-emitting auxiliary layer, wherein the first and second electrodes are not disposed on the plurality of transparent subpixels, the distance between two adjacent second subpixels is greater than the distance between two adjacent first subpixels, and the thickness of the first light-emitting auxiliary layer of the plurality of transparent subpixels is the same as the thickness of the plurality of second subpixels A display device with a thickness greater than that of the first light-emitting auxiliary layer. Claim 17 A display device according to claim 16, further comprising an array layer disposed between the substrate and the first electrode; and a touch layer disposed inside the array layer. Claim 18 A substrate comprising a display area having a plurality of first subpixels and a transparent area having a plurality of second subpixels and a plurality of transparent subpixels; a first electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the substrate; a first light-emitting auxiliary layer disposed on the first electrode; a light-emitting material layer disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the first light-emitting auxiliary layer; a second light-emitting auxiliary layer disposed on the light-emitting material layer; a second electrode disposed on each of the plurality of first subpixels and each of the plurality of second subpixels on the second light-emitting auxiliary layer; and an encap layer disposed on the second electrode, wherein the first and second electrodes are not disposed on the plurality of transparent subpixels, and the distance between at least one of the encap layer and the substrate among the plurality of second subpixels is greater than the distance between at least one of the encap layer and the substrate among the plurality of transparent subpixels, and the plurality A display device in which the thickness of the first light-emitting auxiliary layer of the transparent subpixel is greater than the thickness of the first light-emitting auxiliary layer of the plurality of second subpixels. Claim 19 In claim 18, a display device further comprising a touch layer disposed on top of the incap layer, wherein the touch layer is disposed continuously in the display area and the transparent area. Claim 20 A display device according to claim 19, further comprising a polarizing layer disposed on top of the touch layer, wherein the size of the polarizing layer is smaller than the size of the substrate. Claim 21 In claim 20, the polarizing layer is a display device having a film form of a size corresponding to the display area. Claim 22 A display device according to claim 20, further comprising a non-reflective layer disposed in the transparent region, wherein the polarizing layer and the non-reflective layer are disposed in the same layer. Claim 23 In claim 22, the non-reflective layer is a display device spaced apart from the polarizing layer. Claim 24 In claim 16, a display device in which the thickness of the second light-emitting auxiliary layer of the plurality of transparent subpixels is greater than the thickness of the second light-emitting auxiliary layer of the plurality of second subpixels.

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