Display device with light emitting device and color filter

Abstract

A display apparatus having a light emitting device and a color filter is provided. The display device may include a light emitting device on an emission region of a device substrate, an optical insulating layer disposed on the light emitting device, and a color filter disposed on the optical insulating layer. The optical insulating layer may include an optical trench overlapping the emission region. At least two of the color filters may be stacked on sidewalls of each optical trench. A bottom surface of each optical trench may be covered by one of the color filters. Accordingly, in the display device, color mixing and reflection of external light may be prevented. Accordingly, in the display device, the quality of an image recognized by a user may be improved.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2024-0018026, filed on February 6, 2024, and Korean Patent Application No. 10-2024-0139716, filed on October 14, 2024, which are hereby incorporated by reference as if fully set forth herein. Technical Field

[0003] The present disclosure relates to a display apparatus in which a light emitting device and a color filter are stacked on each emission region of a device substrate. Background Art

[0004] Typically, a display device provides an image to a user. For example, a display device may include light-emitting devices disposed on an emission region of a device substrate. Each light-emitting device may emit light of a specific color. For example, each light-emitting device may include a first electrode, a light-emitting unit, and a second electrode stacked sequentially on one of the emission regions.

[0005] Each emission area can display a different color from an adjacent emission area. For example, a color filter can be provided on the light-emitting device. The color filter of each emission area may include a material different from the color filter of the adjacent emission area. For example, each color filter may be one of a blue filter, a green filter, and a red filter. A blocking pattern may be provided between the color filters. The blocking pattern may include a material that blocks light. Therefore, in the display device, color mixing can be prevented by the blocking pattern.

[0006] In a display device, some light may be reflected by the blocking pattern. For example, in a display device, external light may be reflected toward a user by the blocking pattern. Furthermore, in a display device, light emitted from a light-emitting device in each emission area may be reflected toward an adjacent emission area by the blocking pattern. Therefore, in a display device, light that has passed through the color filter in an unintended emission area may be provided to the user by the blocking pattern. Consequently, the quality of the image perceived by the user may be reduced in the display device. Summary of the Invention

[0007] Accordingly, the present disclosure is directed to a display device that substantially obviates one or more problems due to limitations and disadvantages of the related art.

[0008] An object of the present disclosure is to provide a display device capable of improving the quality of an image recognized by a user.

[0009] Another object of the present disclosure is to provide a display device capable of preventing reflection and leakage of external light.

[0010] Additional advantages, objects, and features of the present disclosure will be set forth in part in the following description and will become apparent to those skilled in the art upon examination of the following or from practice of the present disclosure. The objects and other advantages of the present disclosure may be realized and obtained by the structures particularly pointed out in this specification, its claims, and the accompanying drawings.

[0011] To achieve these objects and other advantages, and in accordance with the purposes of the present disclosure, as embodied and broadly described herein, a display device is provided that includes a device substrate. A first light-emitting device is disposed on a first emission area of the device substrate. An optical insulating layer is disposed on the first light-emitting device. The optical insulating layer includes a first optical groove. The first optical groove overlaps the first emission area. A first color filter is disposed on a first bottom surface of the first optical groove. The first color filter extends to a first sidewall of the first optical groove. A second color filter overlaps the first color filter on the first sidewall. The second color filter includes a material different from that of the first color filter. The first bottom surface includes an area that does not overlap with the second color filter.

[0012] Light passing through the second color filter may display a different color from light passing through the first color filter.

[0013] The first bottom surface of the first optical trench may have a larger size than the first emission area.

[0014] The pixel lens may be disposed on the optical insulating layer, overlap the first emission region, or include an area disposed within the first optical groove.

[0015] A second light-emitting device may be disposed between a second emission region of the device substrate and the optical insulation layer. The optical insulation layer may include a second optical groove that overlaps the second emission region. The second optical groove may be spaced apart from the first optical groove. The first and second color filters may be stacked on a second sidewall of the second optical groove. The second bottom surface of the second optical groove may include an area that does not overlap with the first color filter.

[0016] The second color filter may extend onto the second bottom surface of the second optical trench.

[0017] The first color filter and the second color filter may extend onto an upper surface of the optical insulating layer opposite to the device substrate.

[0018] An upper blocking pattern may be disposed on an upper surface of the optical insulation layer.The upper blocking pattern may be covered by the first color filter and the second color filter.

[0019] An alignment key may be provided between the device substrate and the optical insulating layer. The alignment key may be spaced apart from the first emission region. At least one of the first color filter and the second color filter may include an opening corresponding to the alignment key.

[0020] An encapsulation structure may be disposed between the first light emitting device and the optical insulation layer. The optical insulation layer may include a region disposed between the encapsulation structure and the first bottom surface of the first optical trench.

[0021] In another embodiment, a display device including a device substrate is provided. A light-emitting device and an encapsulation structure are provided on the device substrate. The light-emitting device is provided on an emission area of the device substrate. The light-emitting device is covered by the encapsulation structure. An optical insulating layer is provided on the encapsulation structure. The optical insulating layer includes optical grooves. Each of the optical grooves exposes a portion of the encapsulation structure that overlaps with one of the emission areas. A color filter is stacked on the optical insulating layer. The color filter extends onto the sidewall of each optical groove. The light emitted from each emission area shows a different color from the light emitted from the adjacent emission area. The central area of the bottom surface of each optical groove is covered by one of the color filters.

[0022] The color filter disposed on the central area of the bottom surface of each optical trench may include a different material from the color filter disposed on the central area of the bottom surface of an adjacent optical trench.

[0023] An alignment key may be disposed between the device substrate and the packaging structure. The alignment key may be spaced apart from the emission region. The optical insulation layer may include an alignment groove overlapping the alignment key. The alignment groove may be spaced apart from the optical groove. At least two of the color filters may extend onto sidewalls of the alignment groove.

[0024] At least a portion of a bottom surface of the alignment groove may be exposed by the color filter.

[0025] The device substrate may include an active region in which the emission region is disposed and a frame region disposed outside the active region. The alignment key may be disposed between the frame region of the device substrate and the package structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the principles of the disclosure. In the drawings:

[0027] Figure 1 is a view schematically illustrating a display device according to an embodiment of the present disclosure;

[0028] Figure 2 is a diagram illustrating a circuit of a pixel region in a display device according to an embodiment of the present disclosure;

[0029] Figure 3 is a view showing a cross section of a pixel area in a display device according to an embodiment of the present disclosure;

[0030] Figure 4 is a graph showing relative brightness of a comparative display device and a display device not including an optical groove according to an embodiment of the present disclosure;

[0031] Figure 5 yes Figure 1 Magnified view of the alignment area in ;

[0032] Figure 6 It is along Figure 5 A view taken from I-I'; and

[0033] Figures 7 to 25 is a view illustrating a display device according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] Hereinafter, details related to the above-mentioned objectives, technical configurations, and operational effects of the embodiments of the present disclosure will be clearly understood by referring to the following detailed description with reference to the accompanying drawings, which illustrate some embodiments of the present disclosure. Here, the embodiments of the present disclosure are provided so that the technical spirit of the present disclosure can be satisfactorily conveyed to those skilled in the art, and therefore the present disclosure may be embodied in other forms and is not limited to the embodiments described below.

[0035] In addition, throughout the specification and drawings, the same or very similar elements may be represented by the same reference numerals, and the lengths and thicknesses of layers and regions may be exaggerated for convenience. It should be understood that when a first element is referred to as being "on" a second element, although the first element may be disposed on the second element to contact the second element, a third element may be interposed between the first and second elements.

[0036] Here, terms such as "first" and "second" may be used to distinguish any one element from another element. However, without departing from the technical spirit of the present disclosure, the first element and the second element may be arbitrarily named according to the convenience of those skilled in the art.

[0037] The terms used in the specification of the present disclosure are only used to describe specific embodiments and are not intended to limit the scope of the present disclosure. For example, unless the context clearly indicates otherwise, an element described in the singular is intended to include a plurality of elements. In addition, in the specification of the present disclosure, it will be further understood that the terms "comprise" and "comprising" specify the presence of the features, integers, steps, operations, elements, parts and / or combinations thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or combinations.

[0038] Also, unless “directly” is used, the terms “connected” and “coupled” may include two components being “connected” or “coupled” through one or more other components located between the two components.

[0039] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the example embodiments belong. It should also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and should not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0040] (Example)

[0041] Figure 1 is a view schematically illustrating a display device according to an embodiment of the present disclosure. Figure 2 is a diagram illustrating a circuit of a pixel region in a display device according to an embodiment of the present disclosure.

[0042] Reference Figure 1 and Figure 2 A display device according to an embodiment of the present disclosure may include a display panel DP. The display panel DP may generate an image provided to a user. For example, a plurality of pixel areas PA may be provided within the display panel DP. Various signals may be provided in each pixel area PA through signal wirings GL, DL, and PL. The signal wirings GL, DL, and PL may include a gate line GL for applying a gate signal, a data line DL for applying a data signal, and a power supply voltage supply line PL for supplying a power supply voltage. Each pixel area PA may display a specific color according to the signal applied through the signal wirings GL, DL, and PL. For example, a light-emitting device 300 and a driving circuit DC electrically connected to the light-emitting device 300 may be provided in each pixel area PA.

[0043] The driving circuit DC can control the light-emitting device 300 based on the signals applied to the signal wirings GL, DL, and PL. For example, the driving circuit DC can supply a driving current corresponding to the data signal to the light-emitting device 300 based on the gate signal. The driving current supplied by the driving circuit DC can be maintained for one frame. For example, the driving circuit DC may include a first thin-film transistor TR1, a second thin-film transistor TR2, and a storage capacitor Cst.

[0044] Figure 3 is a view illustrating a cross section of a pixel area in a display device according to an embodiment of the present disclosure.

[0045] Reference Figure 2 and Figure 3 The first thin film transistor TR1 can transmit a data signal to the second thin film transistor TR2 according to a gate signal. For example, the first thin film transistor TR1 can function as a switching thin film transistor. The first thin film transistor TR1 may include a first semiconductor pattern, a first gate electrode, a first drain electrode, and a first source electrode. For example, the first gate electrode may be electrically connected to the gate line GL, and the first drain electrode may be electrically connected to the data line DL.

[0046] The second thin film transistor TR2 can generate a driving current corresponding to the data signal. For example, the second thin film transistor TR2 can function as a driving thin film transistor. The second thin film transistor TR2 may include a second semiconductor pattern 221, a second gate electrode 223, a second drain electrode 225, and a second source electrode 227. For example, the second gate electrode 223 may be electrically connected to the first source electrode, and the second drain electrode 225 may be electrically connected to the power supply voltage line PL.

[0047] The second semiconductor pattern 221 may include a semiconductor material. For example, the second semiconductor pattern 221 may include low-temperature polysilicon (LTPS) or an oxide semiconductor, such as IGZO. The second semiconductor pattern 221 may include a drain region, a channel region, and a source region. The channel region may be disposed between the drain region and the source region. The drain region and the source region may have a lower resistance than the channel region. For example, the drain region and the source region may include conductive regions in an oxide semiconductor. The channel region may be a non-conductive region in the oxide semiconductor.

[0048] The second semiconductor pattern 221 may include the same material as the first semiconductor pattern. The second semiconductor pattern 221 may be disposed on the same layer as the first semiconductor pattern. The second semiconductor pattern 221 may be formed by the same process as the first semiconductor pattern. For example, the second semiconductor pattern 221 may be formed simultaneously with the first semiconductor pattern.

[0049] The second gate electrode 223 may be disposed on a portion of the second semiconductor pattern 221. For example, the second gate electrode 223 may overlap with the channel region of the second semiconductor pattern 221. The drain region and the source region of the second semiconductor pattern 221 may be disposed outside the second gate electrode 223. The second gate electrode 223 may include a conductive material. For example, the second gate electrode 223 may include a metal such as aluminum (Al), chromium (Cr), copper (Cu), molybdenum (Mo), titanium (Ti), and tungsten (W). The second gate electrode 223 may be spaced apart from the second semiconductor pattern 221. The second gate electrode 223 may be insulated from the second semiconductor pattern 221. For example, the channel region of the second semiconductor pattern 221 may have a conductivity corresponding to the voltage of the signal applied to the second gate electrode 223.

[0050] The second gate electrode 223 may include the same material as the first gate electrode. The second gate electrode 223 may be disposed on the same layer as the first gate electrode. The second gate electrode 223 may be formed by the same process as the first gate electrode. For example, the second gate electrode 223 may be formed simultaneously with the first gate electrode.

[0051] The second drain electrode 225 may include a conductive material. For example, the second drain electrode 225 may include a metal such as aluminum (Al), chromium (Cr), copper (Cu), molybdenum (Mo), titanium (Ti), and tungsten (W). The second drain electrode 225 may include a different material from the second gate electrode 223. For example, the second drain electrode 225 may be provided on a different layer from the second gate electrode 223. The second drain electrode 225 may be electrically connected to the drain region of the second semiconductor pattern 221. The second drain electrode 225 may be insulated from the second gate electrode 223.

[0052] The second drain electrode 225 may include the same material as the first drain electrode. The second drain electrode 225 may be disposed on the same layer as the first drain electrode. The second drain electrode 225 may be formed by the same process as the first drain electrode. For example, the second drain electrode 225 may be formed simultaneously with the first drain electrode.

[0053] The second source electrode 227 may include a conductive material. For example, the second source electrode 227 may include a metal such as aluminum (Al), chromium (Cr), copper (Cu), molybdenum (Mo), titanium (Ti), and tungsten (W). The second source electrode 227 may include a material different from that of the second gate electrode 223. For example, the second source electrode 227 may be disposed on a different layer from the second gate electrode 223. The second source electrode 227 may be disposed on the same layer as the second drain electrode 225. The second source electrode 227 may include the same material as the second drain electrode 225. The second source electrode 227 may be formed by the same process as the second drain electrode 225. For example, the second source electrode 227 may be formed simultaneously with the second drain electrode 225. The second source electrode 227 may be electrically connected to the source region of the second semiconductor pattern 221. The second source electrode 227 may be spaced apart from the second drain electrode 225. The second source electrode 227 may be insulated from the second gate electrode 223.

[0054] The second source electrode 227 may include the same material as the first source electrode. The second source electrode 227 may be provided on the same layer as the first source electrode. The second source electrode 227 may be formed by the same process as the first source electrode. For example, the second source electrode 227 may be formed simultaneously with the first source electrode.

[0055] The storage capacitor Cst can maintain the voltage of the signal applied to the second gate electrode 223 of the second thin film transistor TR2 for one frame. For example, the storage capacitor Cst can be electrically connected to the second gate electrode 223 and the second source electrode 227 of the second thin film transistor TR2. The storage capacitor Cst can have a stacked structure of capacitor electrodes. For example, the storage capacitor Cst can have a structure in which a first capacitor electrode electrically connected to the second gate electrode 233 and a second capacitor electrode electrically connected to the second source electrode 227 are stacked. The storage capacitor Cst can be formed using the process used to form the first thin film transistor TR1 and the second thin film transistor TR2. For example, the first capacitor electrode can be provided on the same layer as the second gate electrode 223, and the second capacitor electrode can be provided on the same layer as the second source electrode 227.

[0056] The driving circuit DC of each pixel area PA can be provided on the device substrate 100. For example, the device substrate 100 can support the first thin film transistor TR1, the second thin film transistor TR2, and the storage capacitor Cst of each pixel area PA. The device substrate 100 may include an insulating material. For example, the device substrate 100 may include glass or plastic. A plurality of insulating layers 110, 120, 130, 140, 150, and 160 for preventing unnecessary electrical connection may be provided on the device substrate 100. For example, a buffer insulating layer 110, a gate insulating layer 120, an interlayer insulating layer 130, a device passivation layer 140, a planarization layer 150, and a bank insulating layer 160 may be provided on the device substrate 100.

[0057] The buffer insulating layer 110 may be provided on the device substrate 100. The buffer insulating layer 110 may prevent contamination caused by the device substrate 100 during the process of forming the driving circuit DC of each pixel area PA. For example, the upper surface of the device substrate 100 facing the driving circuit DC of each pixel area PA may be covered by the buffer insulating layer 110. The first thin film transistor TR1, the second thin film transistor TR2, and the storage capacitor Cst of each pixel area PA may be provided on the buffer insulating layer 110. The buffer insulating layer 110 may include an insulating material. For example, the buffer insulating layer 110 may be an inorganic insulating layer made of an inorganic insulating material such as silicon oxide (SiOx) and silicon nitride (SiNx). The buffer insulating layer 110 may have a multilayer structure. For example, the buffer insulating layer 110 may have a structure in which an inorganic insulating layer made of silicon oxide (SiOx) and an inorganic insulating layer made of silicon nitride (SiNx) are stacked.

[0058] The gate insulating layer 120 may be disposed on the buffer insulating layer 110. The second gate electrode 223 of each pixel region PA may be insulated from the second semiconductor pattern 221 of the corresponding pixel region PA by the gate insulating layer 120. For example, the gate insulating layer 120 may cover the first and second semiconductor patterns 221 of each pixel region PA. The first and second gate electrodes 223 of each pixel region PA may be disposed on the gate insulating layer 120. The gate insulating layer 120 may include an insulating material. For example, the gate insulating layer 120 may be an inorganic insulating layer made of an inorganic insulating material such as silicon oxide (SiOx) and silicon nitride (SiNx).

[0059] The interlayer insulating layer 130 may be disposed on the gate insulating layer 120. The second drain electrode 225 and the second source electrode 227 of each pixel region PA may be insulated from the second gate electrode 223 of the corresponding pixel region PA by the interlayer insulating layer 130. For example, the interlayer insulating layer 130 may cover the first gate electrode and the second gate electrode 223 of each pixel region PA. The first drain electrode, the first source electrode, the second drain electrode 225, and the second source electrode 227 of each pixel region PA may be disposed on the interlayer insulating layer 130. The interlayer insulating layer 130 may include an insulating material. For example, the interlayer insulating layer 130 may be an inorganic insulating layer made of an inorganic insulating material.

[0060] A device passivation layer 140 may be provided on the interlayer insulating layer 130. The device passivation layer 140 may prevent damage to the driving circuit DC in each pixel area PA due to external moisture and impact. For example, the first drain electrode, the first source electrode, the second drain electrode 225, and the second source electrode 227 of each pixel area PA may be covered by the device passivation layer 140. The device passivation layer 140 may include an insulating material. For example, the device passivation layer 140 may be an inorganic insulating layer made of an inorganic insulating material.

[0061] The planarization layer 150 may be disposed on the device passivation layer 140. The planarization layer 150 may include an insulating material. The planarization layer 150 may include a material different from the device passivation layer 140. The planarization layer 150 may include a material having relatively high fluidity. For example, the planarization layer 150 may be an organic insulating layer made of an organic insulating material. The thickness difference caused by the driving circuit DC of each pixel area PA may be removed by the planarization layer 150. For example, the upper surface of the planarization layer 150 opposite to the device substrate 100 may be flat. The upper surface of the planarization layer 150 may be parallel to the upper surface of the device substrate 100. The planarization layer 150 may have a greater thickness than the buffer insulating layer 110, the gate insulating layer 120, the interlayer insulating layer 130, and the device passivation layer 140.

[0062] The light emitting device 300 of each pixel area PA may be disposed on the upper surface of the planarization layer 150. The light emitting device 300 of each pixel area PA may emit light displaying a specific color. For example, the light emitting device 300 of each pixel area PA may include a first electrode 310, a light emitting unit 320, and a second electrode 330 sequentially stacked on the planarization layer 150 of the corresponding pixel area PA.

[0063] The first electrode 310 and the second electrode 330 may include a conductive material. The second electrode 330 may include a material different from that of the first electrode 310. For example, the first electrode 310 may have a greater reflectivity than that of the second electrode 330. The transmittance of the second electrode 330 may be greater than that of the first electrode 310. For example, the first electrode 310 may include a metal, and the second electrode 330 may be a transparent electrode made of a transparent conductive material (such as ITO or IZO). The second electrode 330 may have a work function different from that of the first electrode 310. For example, the work function of the second electrode 330 may be less than that of the first electrode 310. Therefore, in the display device according to an embodiment of the present disclosure, the first electrode 310 may serve as an anode, and the second electrode 330 may serve as a cathode.

[0064] The light-emitting unit 320 may generate light having a brightness corresponding to the voltage difference between the first electrode 310 and the second electrode 330. For example, the light-emitting unit 320 may include at least one emission material layer (EML). The emission material layer may include an organic emission material, an inorganic emission material, or a hybrid emission material. For example, the display device according to an embodiment of the present disclosure may be an organic light-emitting display device including an organic emission material. The light generated by the light-emitting unit 320 may be emitted outward through the second electrode 330.

[0065] The light-emitting unit 320 may have a multilayer structure. For example, the light-emitting unit 320 may include at least one of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL). Therefore, in the display device according to an embodiment of the present disclosure, the efficiency of the light-emitting unit 320 can be improved.

[0066] The first electrode 310 of each pixel area PA can be electrically connected to the driving circuit DC of the corresponding pixel area PA. For example, the first electrode 310 of each pixel area PA can directly contact the second source electrode 227 of the corresponding pixel area PA by penetrating the device passivation layer 140 and the planarization layer 150. Therefore, in the display device according to an embodiment of the present disclosure, the driving current generated by the driving circuit DC of each pixel area PA can be applied to the first electrode 310 of the corresponding pixel area PA.

[0067] The first electrode 310 of each pixel area PA may be insulated from the first electrode 310 of an adjacent pixel area PA. For example, the first electrode 310 of each pixel area PA may be spaced apart from the first electrode 310 of an adjacent pixel area PA. A bank insulating layer 160 may be provided between the first electrodes 310 of adjacent pixel areas PA. The bank insulating layer 160 may include an insulating material. For example, the bank insulating layer 160 may be an organic insulating layer made of an organic insulating material. The bank insulating layer 160 may be provided on the planarization layer 150. The bank insulating layer 160 may include a material different from that of the planarization layer 150.

[0068] The bank insulating layer 160 may partially expose the first electrode 310 of each pixel area PA. For example, the edge of the first electrode 310 in each pixel area PA may be covered by the bank insulating layer 160. The bank insulating layer 160 may define emission areas BEA, GEA, and REA in each pixel area PA. For example, the light emitting unit 320 and the second electrode 330 of each pixel area PA may be stacked on the portion of the corresponding first electrode 310 exposed by the bank insulating layer 160. The light emitting unit 320 of each pixel area PA may be in direct contact with the first electrode 310 and the second electrode 330 of the corresponding pixel area PA within the emission areas BEA, GEA, and REA of the corresponding pixel area PA.

[0069] The first electrode 310 of each pixel area PA can be electrically connected to the second source electrode 227 of the corresponding pixel area PA outside the emission area BEA, GEA, and REA defined in the corresponding pixel area PA. For example, the connection area between the second source electrode 227 and the first electrode 310 in each pixel area PA can overlap with the bank insulating layer 160. Therefore, in the display device according to the embodiment of the present disclosure, the portion of the first electrode 310 overlapping with the emission area BEA, GEA, and REA of each pixel area PA can directly contact the upper surface of the planarization layer 150. That is, in the display device according to the embodiment of the present disclosure, the position variation of the first electrode 310 in the emission area BEA, GEA, and REA of each pixel area PA can be minimized. Therefore, in the display device according to the embodiment of the present disclosure, the luminance deviation according to the generation position of the light emitted from the emission area BEA, GEA, and REA of each pixel area PA can be prevented.

[0070] The emission areas BEA, GEA and REA of each pixel area PA can display a different color from the emission areas BEA, GEA and REA of adjacent pixel areas PA. For example, the emission areas BEA, GEA and REA of each pixel area PA can be one of a blue emission area BEA for realizing blue, a green emission area GEA for realizing green, and a red emission area REA for realizing red. The light emitted from the light-emitting device 300 of each pixel area PA can display a different color from the light emitted from the light-emitting device 300 of the adjacent pixel area PA. For example, the light generated by the light-emitting unit 320 of each pixel area PA can be blue light, green light or red light. The light-emitting unit 320 of each pixel area PA can be spaced apart from the light-emitting unit 320 of the adjacent pixel area PA. For example, the light-emitting unit 320 of each pixel area PA may include an end portion arranged on the embankment insulating layer 160.

[0071] The voltage applied to the second electrode 330 of each pixel area PA can be the same as the voltage applied to the second electrode 330 of the adjacent pixel area PA. For example, the second electrode 330 of each pixel area PA can be electrically connected to the second electrode 330 of the adjacent pixel area PA. The second electrode 330 of each pixel area PA can include the same material as the second electrode 330 of the adjacent pixel area PA. The second electrode 330 of each pixel area PA can be in direct contact with the second electrode 330 of the adjacent pixel area PA. For example, the second electrode 330 of each pixel area PA can be formed simultaneously with the second electrode 330 of the adjacent pixel area PA. Therefore, in the display device according to an embodiment of the present disclosure, the process of forming the second electrode 330 in each pixel area PA can be simplified. Furthermore, in the display device according to an embodiment of the present disclosure, the brightness of the light generated by the light emitting unit 320 of each pixel area PA can be adjusted by the data signal applied to the driving circuit DC of the corresponding pixel area PA.

[0072] The encapsulation structure 400 may be provided on the light-emitting device 300 of each pixel area PA. The encapsulation structure 400 may prevent damage to the light-emitting device 300 due to external moisture and impact. The encapsulation structure 400 may have a multilayer structure. For example, the encapsulation structure 400 may include a first encapsulation layer 410, a second encapsulation layer 420, and a third encapsulation layer 430 sequentially stacked on the second electrode 330 of each pixel area PA. The first encapsulation layer 410, the second encapsulation layer 420, and the third encapsulation layer 430 may include an insulating material. The second encapsulation layer 420 may include a material different from that of the first encapsulation layer 410 and the third encapsulation layer 430. For example, the first encapsulation layer 410 and the third encapsulation layer 430 may be inorganic insulating layers made of an inorganic insulating material, and the second encapsulation layer 420 may be an organic insulating layer made of an organic insulating material. Therefore, in the display device according to an embodiment of the present disclosure, damage to the light-emitting device 300 due to external moisture and impact can be effectively prevented. The second encapsulation layer 420 can remove the thickness difference caused by the light-emitting device 300 of each pixel area PA. For example, the upper surface of the encapsulation structure 400 opposite to the device substrate 100 can be flat. The upper surface of the encapsulation structure 400 can be parallel to the upper surface of the device substrate 100. The second encapsulation layer 420 can have a greater thickness than the first encapsulation layer 410 and the third encapsulation layer 430.

[0073] The optical insulation layer 500 may be disposed on the packaging structure 400. The optical insulation layer 500 may include an insulating material. The optical insulation layer 500 may include a transparent material. For example, the optical insulation layer 500 may include an inorganic insulating material and / or an organic insulating material. The optical insulation layer 500 may include a plurality of optical grooves 501h. Each optical groove 501h may include an optical bottom surface 501hb and optical sidewalls 501hs. The optical bottom surface 501hb of each optical groove 501h may be disposed proximate to the packaging structure 400. Each optical groove 501h may completely penetrate the optical insulation layer 500. For example, the optical bottom surface 501hb of each optical groove 501h may be continuous with the bottom surface of the optical insulation layer 500 facing the packaging structure 400. The optical sidewalls 510hs of each optical groove 501h may extend from the edge of the optical bottom surface 501hb of the corresponding optical groove 501h. The optical sidewall 501hs of each optical trench 501h may be inclined relative to the optical bottom surface 501hb of the corresponding optical trench 501h. For example, the horizontal width of each optical trench 501h may increase toward the upper surface of the optical insulation layer 500 opposite to the device substrate 100.

[0074] The optical groove 501h can be arranged on the emission area BEA, GEA and REA of the pixel area PA. For example, the emission area BEA, GEA and REA of each pixel area PA can overlap with one of the optical grooves 501h. The portion of the encapsulation structure 400 that overlaps with the emission area BEA, GEA and REA of each pixel area PA can be exposed by the optical bottom surface 501hb of one of the optical grooves 501h. The optical bottom surface 501hb of the optical groove 501h in each pixel area PA can have a larger size than the emission area BEA, GEA and REA defined in the corresponding pixel area PA. Therefore, in the display device according to the embodiment of the present disclosure, the optical insulation layer 500 does not overlap with the emission area BEA, GEA and REA of each pixel area PA. For example, in the display device according to the embodiment of the present disclosure, the area arranged between the emission area BEA, GEA and REA can be defined as a non-emission area NEA, and the optical insulation layer 500 can be arranged in the non-emission area NEA.

[0075] The blocking structure 600 can be disposed on the upper surface of the optical insulation layer 500. The blocking pattern 600 can be disposed outside the optical groove 501h. For example, the optical bottom surface 501hb and the optical sidewall 510hs of each optical groove 501h cannot be covered by the blocking pattern 600. The blocking pattern 600 may include a material that blocks light. For example, the blocking pattern 600 may include a black dye, such as carbon black. Therefore, in the display device according to an embodiment of the present disclosure, the blocking pattern 600 can serve as a black matrix. That is, in the display device according to an embodiment of the present disclosure, light emitted from the emission areas BEA, GEA, and REA of each pixel area PA toward the upper surface of the optical insulation layer 500 can be absorbed or reflected by the blocking pattern 600.

[0076] The color filters 700B, 700G, and 700R may be stacked on the blocking pattern 600. The emission areas BEA, GEA, and REA of each pixel area PA may overlap with one of the color filters 700B, 700G, and 700R. For example, the color filters 700B, 700G, and 700R may include a blue filter 700B overlapping with the blue emission area BEA, a green filter 700G overlapping with the green emission area GEA, and a red filter 700R overlapping with the red emission area REA. Therefore, in the display device according to the embodiment of the present disclosure, the external light Le traveling toward the blocking pattern 600 may be blocked by the color filters 700B, 700G, and 700R. That is, in the display device according to the embodiment of the present disclosure, the external light Le that is not absorbed by the blocking pattern cannot be reflected toward the user. Therefore, in the display device according to the embodiment of the present disclosure, the degradation of image quality due to the reflection of the external light Le can be prevented.

[0077] The color filters 700B, 700G, and 700R may extend onto the optical sidewalls 501hs of each optical trench 501h. For example, a blue filter 700B, a green filter 700G, and a red filter 700R may be stacked on the optical sidewalls 501hs of each optical trench 501h. The blocking pattern 600 may be covered by the color filters 700B, 700G, and 700R. Therefore, in a display device according to an embodiment of the present disclosure, light Ld emitted from the emission areas BEA, GEA, and REA of each pixel area PA and not absorbed by the blocking pattern 600 may be blocked by the color filters 700B, 700G, and 700R stacked on the optical sidewalls 501hs of each optical trench 501h. In other words, in a display device according to an embodiment of the present disclosure, light reflected by the blocking pattern 600 cannot travel toward adjacent pixel areas PA. Therefore, in a display device according to an embodiment of the present disclosure, unintentional mixing of light can be effectively prevented.

[0078] In the display device according to the embodiment of the present disclosure, the traveling direction of the light emitted from the emission areas BEA, GEA and REA can be limited by the blocking pattern 600, the optical groove 501h and the color filters 700B, 700G and 700R. For example, in the display device according to the embodiment of the present disclosure, the viewing angle of the light emitted from the emission areas BEA, GEA and REA of each pixel area PA can be reduced by the blocking pattern 600, the optical groove 501h and the color filters 700B, 700G and 700R. That is, in the display device according to the embodiment of the present disclosure, a narrow viewing angle can be achieved by the blocking pattern 600, the optical groove 501h and the color filters 700B, 700G and 700R. Therefore, in the display device according to the embodiment of the present disclosure, the process of achieving a narrow viewing angle can be simplified. Therefore, in the display device according to the embodiment of the present disclosure, production energy can be reduced through process optimization.

[0079] Each of the color filters 700B, 700G, and 700R may extend onto the optical bottom surface 501hb of one of the optical trenches 501h. The optical bottom surface 501hb of each optical trench 501h may be covered by one of the color filters 700B, 700G, and 700R. For example, the optical bottom surface 501hb of the optical trench 501h that overlaps with the blue emission area BEA may include an area that does not overlap with the green filter 700G and the red filter 700R, and the blue filter 700B may be provided on the portion of the optical bottom surface 501hb of the optical trench 501h that is exposed by the green filter 700G and the red filter 700R. The optical bottom surface 501hb of the optical groove 501h that overlaps with the green emission area GEA can be in direct contact with the green filter 700G, and the blue filter 700B and the red filter 700R do not overlap with the portion of the optical bottom surface 501hb of the optical groove 501h that overlaps with the green filter 700G. The central area of the optical bottom surface 501hb of the optical groove 501h exposed by the blue filter 700B and the green filter 700G can be covered by the red filter 700R. Therefore, in the display device according to the embodiment of the present disclosure, the light generated by the light-emitting device 300 of the blue emission area BEA can be emitted to the outside through the blue filter 700B, the light generated by the light-emitting device 300 of the green emission area GEA can be emitted to the outside through the green filter 700G, and the light generated by the light-emitting device 300 of the red emission area REA can be emitted to the outside through the red filter 700R. Therefore, in the display device according to the embodiment of the present disclosure, light leakage due to light not passing through one of the color filters 700B, 700G, and 700R can be prevented. Also, in the display device according to the embodiment of the present disclosure, color reproduction can be improved.

[0080] The portion of the optical bottom surface 501hs of the optical trench 501h exposed by the green filter 700G and the red filter 700R may have the same size as the blue emission area BEA, the portion of the optical bottom surface 501hs of the optical trench 501h exposed by the blue filter 700B and the red filter 700R may have the same size as the green emission area GEA, and the portion of the optical bottom surface 501hs of the optical trench 501h exposed by the blue filter 700B and the green filter 700G may have the same size as the red emission area REA. Therefore, in the display device according to an embodiment of the present disclosure, the degradation of image quality caused by light reflected by the blocking pattern 600 can be prevented without reducing the areas of the emission areas BEA, GEA, and REA defined in each pixel area PA.

[0081] The pixel lens 800 can be arranged on the color filters 700B, 700G and 700R. The pixel lens 800 can be arranged on the emission areas BEA, GEA and REA of the pixel area PA. For example, the emission areas BEA, GEA and REA of each pixel area PA can overlap with one of the pixel lenses 800. Light passing through the optical bottom surface 501hb of each optical groove 501h and one of the color filters 700B, 700G and 700R can be focused by one of the pixel lenses 800. For example, each pixel lens 800 can be used as a convex lens. The surface of each pixel lens 800 opposite to the optical insulation layer 500 can have a convex shape. Therefore, in the display device according to the embodiment of the present disclosure, the front brightness of the emission areas BEA, GEA and REA defined in each pixel area PA can be improved.

[0082] The pixel lens 800 may overlap with the optical groove 501h. For example, each pixel lens 800 may include an area provided within one of the optical grooves 501h. The pixel lens 800 provided on each pixel area PA may have a larger size than the emission areas BEA, GEA, and REA of the corresponding pixel area PA. For example, the optical groove 501h provided on each pixel area PA may be filled by a portion of the pixel lens 800 provided on the corresponding pixel area PA. Therefore, in the display device according to the embodiment of the present disclosure, the movement of the pixel lens 800 due to external impact can be prevented. Moreover, in the display device according to the embodiment of the present disclosure, the misalignment of the pixel lens 800 during the formation process can be prevented. Therefore, in the display device according to the embodiment of the present disclosure, the reduction in image quality due to the positional difference between the optical groove 501h and the pixel lens 800 on each pixel area PA can be prevented.

[0083] A lens passivation layer 900 may be disposed on the pixel lens 800. The lens passivation layer 900 may prevent damage to the pixel lens 800 due to external impact. For example, the surface of each pixel lens 800 having a convex shape may be completely covered by the lens passivation layer 900. The lens passivation layer 900 may include an insulating material. For example, the lens passivation layer 900 may include an inorganic insulating material and / or an organic insulating material. The refractive index of the lens passivation layer 900 may be lower than the refractive index of each pixel lens 800. Therefore, in the display device according to an embodiment of the present disclosure, due to the difference in refractive index between the corresponding pixel lens 800 and the lens passivation layer 900, light passing through the pixel lens 800 of each pixel area PA cannot be reflected toward the device substrate 100. Therefore, in the display device according to an embodiment of the present disclosure, light extraction efficiency can be improved.

[0084] Figure 4 is a graph showing relative brightness of a comparative display device ① not including the optical groove 501h and a display device ② according to an embodiment of the present disclosure.

[0085] Reference Figure 4 In the comparative display device ①, light leakage was detected at a point with a viewing angle of approximately 30° to 40°, but in the display device ② according to the embodiment of the present disclosure, no light leakage was detected at a point with a viewing angle greater than 30°. That is, in the display device according to the embodiment of the present disclosure, light leakage can be prevented by the color filters 700B, 700G, and 700R stacked on the optical sidewalls 501hs of each optical groove 501h. Therefore, in the display device according to the embodiment of the present disclosure, image degradation due to light leakage can be prevented. Therefore, in the display device according to the embodiment of the present disclosure, the quality of the image recognized by the user can be improved.

[0086] Therefore, the display device according to an embodiment of the present disclosure may include a light-emitting device 300, an optical insulation layer 500, a blocking pattern 600, color filters 700B, 700G and 700R, a pixel lens 800 and a lens passivation layer 900 arranged on a device substrate 100, wherein the optical insulation layer 500 may include an optical groove 501h overlapping with the emission areas BEA, GEA and REA, the optical bottom surface 501hb of each optical groove 501h may be covered by one of the color filters 700B, 700G and 700R, and the color filters 700B, 700G and 700R may be stacked on the optical sidewall 501hs of each optical groove 501h and the blocking pattern 600. Therefore, in the display device according to the embodiment of the present disclosure, the traveling direction of the light emitted from the light emitting device 300 of each pixel area PA can be limited by the stacked structure of the blocking pattern 600 and the color filters 700B, 700G, and 700R, and the light not absorbed by the blocking pattern 600 and the light traveling toward the blocking pattern 600 can be blocked by the stacked color filters 700B, 700G, and 700R. Therefore, in the display device according to the embodiment of the present disclosure, the degradation of the image quality recognized by the user due to the light reflected by the blocking pattern 600 can be prevented.

[0087] Furthermore, in the display device according to an embodiment of the present disclosure, a narrow viewing angle can be achieved by using the blocking pattern 600, the optical groove 501h, and the color filters 700B, 700G, and 700R. For example, the blocking pattern 600, the optical groove 501h, and the color filters 700B, 700G, and 700R prevent the image provided to the user from being recognized by people around the user. In other words, in the display device provided according to an embodiment of the present disclosure, the process for achieving a narrow viewing angle can be simplified. Therefore, in the display device according to an embodiment of the present disclosure, production energy can be reduced through process optimization.

[0088] like Figure 1 As shown, the display panel DP may include an active area AA in which a pixel area PA is provided, and a border area BZ provided outside the active area AA. The border area BZ may be provided outside the pixel area PA. For example, the active area AA may be surrounded by the border area BZ. The gate driver GD is electrically connected to the gate line GL, the data driver DD is electrically connected to the data line DL, the timing controller TC is electrically connected to the gate driver GD and the data driver DD, and the power supply unit PU electrically connected to the power voltage supply line PL may be provided outside the active area AA. At least one of the gate driver GD, the data driver DD, the timing controller TC and the power supply unit PU may be provided on the border area BZ. For example, the display device according to an embodiment of the present disclosure may be a GIP (gate-in-panel) type display device in which the gate driver GD is formed on the border area BZ.

[0089] The alignment area KA may be disposed on the bezel area BZ. Each alignment area KA may be spaced apart from the active area AA. For example, in the display device according to an embodiment of the present disclosure, each alignment area KA may be disposed near one of the four corners of the display panel DP.

[0090] Figure 5 yes Figure 1 Magnified view of the alignment area KA in FIG. Figure 6 It is along Figure 5 The view taken from I-I'.

[0091] Reference Figure 1 、 Figure 3 、 Figure 5 and Figure 6 The display device according to an embodiment of the present disclosure may include at least one alignment key AK disposed in each alignment area KA. The alignment key AK may be used to align the device substrate 100 within the processing chamber. For example, the deposition equipment used in the process of forming the planarization layer 150 may determine whether the device substrate 100 is misaligned within the deposition chamber by visually inspecting the position of the alignment key AK. The alignment key AK may have various shapes. For example, the alignment key AK may include a plurality of first keys AKh having a strip shape extending in a first direction and a plurality of second keys AKv having a strip shape extending in a second direction perpendicular to the first direction. The plurality of first keys AKh may be arranged side by side in the second direction. The plurality of second keys AKv may be arranged side by side in the first direction. Therefore, in the display device according to an embodiment of the present disclosure, the alignment key AK may be used to simultaneously inspect the misalignment of the device substrate 100 in the first and second directions.

[0092] The alignment key AK may comprise a material having a high reflectivity. The alignment key AK may be formed using the same process used to form the drive circuit DC of each pixel area PA. For example, the plurality of first keys AKh and the plurality of second keys AKv may comprise the same material as the second drain electrode 225 and the second source electrode 227 of each pixel area PA. The plurality of first keys AKh and the plurality of second keys AKv may be disposed on the same layer as the second drain electrode 225 and the second source electrode 227 of each pixel area PA. For example, the buffer insulating layer 110, the gate insulating layer 120, the interlayer insulating layer 130, the device passivation layer 140, the planarization layer 150, the bank insulating layer 160, the encapsulation structure 400, the optical insulating layer 500, and the lens passivation layer 900 may extend over the border area BZ, and the plurality of first keys AKh and the plurality of second keys AKv may be disposed between the interlayer insulating layer 130 and the device passivation layer 140 of the border area BZ. The plurality of first keys AKh and the plurality of second keys AKv may be formed using the same process as the second drain electrode 225 and the second source electrode 227 of each pixel area PA. For example, a plurality of first keys AKh and a plurality of second keys AKv may be formed simultaneously with the second drain electrode 225 and the second source electrode 227 of each pixel area PA.

[0093] The optical insulation layer 500 may include alignment grooves 502h that overlap with the alignment keys AK. For example, each of the alignment grooves 502h may overlap with one of the first keys AKh or one of the second keys AKv. The plane of each alignment groove 502h may have a shape corresponding to the plane of the corresponding first key AKh or the plane of the corresponding second key AKv. Therefore, in the display device according to an embodiment of the present disclosure, the alignment keys AK can be effectively inspected during the alignment process of the device substrate 100.

[0094] Each of the alignment grooves 502h can include an alignment bottom surface 502hb and an alignment sidewall 502hs. The alignment bottom surface 502hb of each alignment groove 502h can be disposed proximate to the package structure 400. The alignment sidewall 502hs of each alignment groove 502h can extend from an edge of the alignment bottom surface 502hb of the corresponding alignment groove 502h. The alignment sidewall 502hs of each alignment groove 502h can be inclined relative to the alignment bottom surface 502hb of the corresponding alignment groove 502h. For example, the horizontal width of each alignment groove 502h can increase toward the upper surface of the optical insulation layer 500.

[0095] The alignment grooves 502h can be formed simultaneously with the optical grooves 501h. For example, each of the alignment grooves 502h can completely penetrate the optical insulation layer 500. The alignment bottom surface 502hb of each of the alignment grooves 502h can be continuous with the lower surface of the optical insulation layer 500. Therefore, in the display device according to an embodiment of the present disclosure, a reduction in process efficiency due to the process of forming the alignment grooves 502h can be prevented.

[0096] The color filters 700B, 700G, and 700R may be stacked on the alignment sidewalls 502hs of each alignment groove 502h. For example, the blue color filter 700B, the green color filter 700G, and the red color filter 700R may be stacked on the alignment sidewalls 502hs of each alignment groove 502h. The alignment bottom surface 502hb of each alignment groove 502h may include an area disposed outside the color filters 700B, 700G, and 700R. For example, the center area of the alignment bottom surface 502hb of each alignment groove 502h exposed by the color filters 700B, 700G, and 700R may overlap with one of the first keys AKh or one of the second keys AKv. The blocking pattern 600 may be disposed between the upper surface of the optical insulation layer 500 and the color filters 700B, 700G, and 700R in the frame area BZ. Therefore, in the display device according to the embodiment of the present disclosure, the reflection of external light Le on the bezel area BZ can be prevented. Therefore, in the display device according to the embodiment of the present disclosure, the visibility of the alignment key AK can be improved. That is, in the display device according to the embodiment of the present disclosure, the reliability of the process of aligning the device substrate 100 in the process chamber can be improved.

[0097] A display device according to an embodiment of the present disclosure has been described, in which the drive circuit DC of each pixel area PA may be composed of a first thin-film transistor TR1, a second thin-film transistor TR2, and a storage capacitor Cst. However, in a display device according to another embodiment of the present disclosure, the drive circuit DC of each pixel area PA may include a drive thin-film transistor and at least one switching thin-film transistor. For example, in a display device according to another embodiment of the present disclosure, the drive circuit DC of each pixel area PA may further include a third thin-film transistor capable of initializing the storage capacitor Cst of the corresponding pixel area PA based on a gate signal. The third thin-film transistor of each pixel area PA may include a third semiconductor pattern, a third gate electrode, a third drain electrode, and a third source electrode. The third semiconductor pattern of each pixel area PA may include a semiconductor material. The third gate electrode of each pixel area PA may be electrically connected to the corresponding gate line GL. The third drain electrode of each pixel area PA may be electrically connected to an initialization line for applying an initialization signal. The third source electrode of each pixel area PA may be electrically connected to the storage capacitor Cst of the corresponding pixel area PA. Therefore, in a display device according to another embodiment of the present disclosure, the degree of freedom in configuring each drive circuit DC can be increased.

[0098] In a display device according to an embodiment of the present disclosure, the positions and electrical connections of the first drain electrode, first source electrode, second drain electrode 225, and second source electrode 227 in each drive circuit DC can vary depending on the configuration of the corresponding drive circuit DC and / or the type of the corresponding thin-film transistors TR1 and TR2. For example, in a display device according to another embodiment of the present disclosure, the second gate electrode 223 of each drive circuit DC can be electrically connected to the first drain electrode of the corresponding drive circuit DC. Therefore, in a display device according to another embodiment of the present disclosure, the degree of freedom in the configuration of each drive circuit DC and the type of each thin-film transistor TR1 and TR2 can be increased.

[0099] A display device according to an embodiment of the present disclosure is described, in which a blue filter 700B, a green filter 700G, and a red filter 700R can be stacked on the optical sidewall 501hs of each optical trench 501h. However, in a display device according to another embodiment of the present disclosure, the optical sidewall 501hs of each optical trench 501h can be covered by at least two color filters 700B, 700G, and 700R including different materials. The color filters 700B, 700G, and 700R overlapping the emission areas BEA, GEA, and REA of each pixel area PA can extend to the optical sidewall 501hs of the optical trench 501h provided on the corresponding pixel area PA. For example, in the display device according to the embodiment of the present disclosure, the blue filter 700B may overlap with the green filter 700G or the red filter 700R on the optical sidewall 501hs of the optical trench 501h disposed on the blue emission area BEA, the green filter 700G may overlap with the blue filter 700B or the red filter 700R on the optical sidewall 501hs of the optical trench 501h disposed on the green emission area GEA, and the red filter 700R may overlap with the blue filter 700B or the green filter 700G on the optical sidewall 501hs of the optical trench 501h disposed on the red emission area REA, as shown in FIG. Figure 7 and Figure 8 As shown. The blocking pattern 600 may be covered by two color filters 700B, 700G, and 700R made of different materials. Therefore, in the display device according to another embodiment of the present disclosure, the process of forming the color filters 700B, 700G, and 700R can be simplified. In addition, in the display device according to another embodiment of the present disclosure, color degradation caused by misalignment of the color filters 700B, 700G, and 700R can be prevented.

[0100] The two color filters 700B, 700G, and 700R stacked on the alignment sidewalls of each alignment groove 502h can be the same as the two color filters 700B, 700G, and 700R stacked on the alignment sidewalls of adjacent alignment grooves 502h. The wavelength range of light passing through the main color filters 700B, 700G, and 700R set on the alignment sidewalls of each alignment groove 502h does not overlap with the wavelength range of light passing through the auxiliary color filters 700B, 700G, and 700R set on the alignment sidewalls of each alignment groove 502h. For example, a blue color filter 700B and a red color filter 700R can be stacked on the alignment sidewalls of each alignment groove 502h. Therefore, in a display device according to another embodiment of the present disclosure, the visibility of the first key AKh and the second key AKv can be effectively improved.

[0101] The display device according to an embodiment of the present disclosure is described in which the lower surface of the optical insulation layer 500 is in direct contact with the upper surface of the encapsulation structure 400. However, in a display device according to another embodiment of the present disclosure, at least one layer or pattern may be provided between the encapsulation structure 400 and the optical insulation layer 500. For example, in a display device according to another embodiment of the present disclosure, the barrier pattern 600 may include a lower barrier pattern 610 provided between the encapsulation structure 400 and the optical insulation layer 500 and an upper barrier pattern 620 provided on the upper surface of the optical insulation layer 500, as shown in FIG. Figure 9 and Figure 10 As shown. The lower blocking pattern 610 can be spaced apart from the optical lower surface and the optical sidewall of each optical groove 501h. For example, the lower blocking pattern 610 can be completely covered by the optical insulation layer 500. The lower blocking pattern 610 may include a material that blocks light. For example, the lower blocking pattern 610 may include a black dye, such as carbon black. The lower blocking pattern 610 may include the same material as the upper blocking pattern 620. Therefore, in a display device according to another embodiment of the present disclosure, the traveling direction of light emitted from the light-emitting device 300 of each pixel area PA can be limited by the lower blocking pattern 610, the upper blocking pattern 620, the optical groove 501h, and the color filters 700B, 700G, and 700R. For example, in the display device according to an embodiment of the present disclosure, light emitted from the light-emitting device 300 of each pixel area PA toward the adjacent non-emission area NEA can be primarily blocked by the lower blocking pattern 610 and secondarily blocked by the upper blocking pattern 620, and the progress of light reflected by the lower blocking pattern 610 and / or the upper blocking pattern 620 can be blocked by the color filters 700B, 700G, and 700R stacked on the optical sidewalls of each optical trench 501h. Therefore, in the display device according to another embodiment of the present disclosure, a narrow viewing angle can be effectively achieved.

[0102] The display device according to an embodiment of the present disclosure is described, in which the blocking pattern 600 may be covered by the color filters 700B, 700G, and 700R. However, in a display device according to another embodiment of the present disclosure, the blocking pattern 600 may be omitted. For example, in a display device according to another embodiment of the present disclosure, the upper surface of the optical insulation layer 500 may be in direct contact with one of the color filters 700B, 700G, and 700R, such as Figure 11 and Figure 12As shown. Therefore, in the display device according to another embodiment of the present disclosure, the light emitted from the light-emitting device 300 of each pixel area PA can be limited by the color filters 700B, 700G and 700R stacked on the upper surface of the optical insulation layer 500 and the optical sidewall of each optical groove 501h. That is, in the display device according to another embodiment of the present disclosure, the process of forming the blocking pattern can be completely omitted. Therefore, in the display device according to another embodiment of the present disclosure, the process of achieving a narrow viewing angle can be minimized. Moreover, in the display device according to another embodiment of the present disclosure, the production energy can be significantly reduced through process optimization.

[0103] The display device according to an embodiment of the present disclosure is described, in which the optical bottom surface 501hb of each optical trench 501h and the alignment bottom surface 502hb of each alignment trench 502h may be continuous with the lower surface of the optical insulation layer 500. However, in a display device according to another embodiment of the present disclosure, the optical bottom surface 501hb of each optical trench 501h and the alignment bottom surface 502hb of each alignment trench 502h may be spaced apart from the package structure 400. For example, in a display device according to another embodiment of the present disclosure, the optical insulation layer 500 may include a region disposed between the package structure 400 and the optical bottom surface of each optical trench 501h and a region disposed between the package structure 400 and the alignment bottom surface of each alignment trench 502h, as shown in FIG. Figure 13 and Figure 14 As shown. Therefore, in the display device according to another embodiment of the present disclosure, the optical path of light emitted from the light-emitting device 300 in each pixel area PA can be increased by the optical insulation layer 500. For example, in the display device according to another embodiment of the present disclosure, the optical path of light emitted from the light-emitting device 300 in each pixel area PA can be sufficiently ensured by the optical insulation layer 500. Therefore, in the display device according to another embodiment of the present disclosure, the quality of the image recognized by the user can be improved.

[0104] The display device according to an embodiment of the present disclosure is described in which the color filters 700B, 700G, and 700R may expose the center area of the alignment bottom surface 502hb of each alignment groove 502h. However, in a display device according to another embodiment of the present disclosure, the alignment bottom surface 502hb of each alignment groove 502h may be covered by at least one of the color filters 700B, 700G, and 700R. For example, in a display device according to another embodiment of the present disclosure, the alignment bottom surface 502hb of each alignment groove 502h may be covered by the red color filter 700R, as shown in FIG. Figure 15As shown. Therefore, in the display device according to another embodiment of the present disclosure, it is possible to prevent the visibility of the alignment keys AKh and AKv from being reduced due to light reflected by the plurality of first keys AKh and the plurality of second keys AKv. Therefore, in the display device according to another embodiment of the present disclosure, the process of aligning the device substrate 100 in the process chamber can be efficiently performed.

[0105] The display device according to an embodiment of the present disclosure is described, in which the alignment groove 502h can be formed in the optical insulation layer 500 of the bezel area BZ. However, in a display device according to another embodiment of the present disclosure, the color filters 700B, 700G, and 700R of the bezel area BZ may include an opening 700h that exposes a portion of the upper surface of the optical insulation layer 500 that overlaps with the plurality of first keys AKh and the plurality of second keys AKv, as shown in FIG. Figure 16 As shown. That is, in the display device according to another embodiment of the present disclosure, the alignment grooves cannot be formed. The positions of the alignment keys AKh and AKv can be checked through the opening 700h that penetrates the color filters 700B, 700G, and 700R. Therefore, in the display device according to another embodiment of the present disclosure, the visibility of the alignment keys AKh and AKv can be prevented from being reduced due to misalignment of the alignment grooves.

[0106] The display device according to an embodiment of the present disclosure is described, in which the alignment area KA can be set on the frame area BZ. However, in a display device according to another embodiment of the present disclosure, the alignment area KA can be formed in various positions. For example, the display device according to an embodiment of the present disclosure may include a first alignment area KA1 set on the frame area BZ, a second alignment area KA2 set on the active area AA, and a third alignment area KA3 overlapping the boundary between the active area AA and the frame area BZ, as shown in FIG. Figure 17 and Figure 18 As shown. The alignment key AK of each alignment area KA1, KA2 and KA3 can be spaced apart from the emission area GEA, the gate driver GD and the signal wiring. For example, the alignment key AK in the third alignment area KA3 and the alignment groove 502h overlapping with the alignment key AK may include an area overlapping with the non-emission area NEA of the active area AA. That is, in a display device according to another embodiment of the present disclosure, the alignment key AK and the alignment groove 502h can be provided on the non-emission area NEA or the border area BZ spaced apart from the emission area GEA, the gate driver GD and the signal wiring. Therefore, in a display device according to another embodiment of the present disclosure, alignment of the device substrate 100 using the alignment key AK can be effectively performed.

[0107] A display device according to an embodiment of the present disclosure is described, in which a single emission area BEA, GEA, and REA may be defined in each pixel area PA. However, in a display device according to another embodiment of the present disclosure, each pixel area PA may include a plurality of emission areas BEA, GEA, and REA. For example, in a display device according to another embodiment of the present disclosure, each of the pixel areas B-PA, G-PA, and R-PA may include a first subpixel SP1 and a second subpixel SP2, and each of the first subpixel SP1 and the second subpixel SP2 in each of the pixel areas B-PA, G-PA, and R-PA may include at least one emission area BEA1, BEA2, GEA1, GEA2, REA1, and REA2, as shown in FIG. Figures 19 to 21 As shown. The second subpixel SP2 of each pixel area B-PA, G-PA, and R-PA can display the same color as the first subpixel SP1 of the corresponding pixel area B-PA, G-PA, and R-PA. For example, each of the pixel areas B-PA, G-PA, and R-PA can be one of the blue pixel area B-PA, the green pixel area G-PA, and the red pixel area R-PA. In the blue pixel area B-PA, the first subpixel SP1 and the second subpixel SP2 realize blue, in the green pixel area G-PA, the first subpixel SP1 and the second subpixel SP2 realize green, and in the red pixel area R-PA, the first subpixel SP1 and the second subpixel SP2 realize red.

[0108] The number of emission regions BEA1, BEA2, GEA1, GEA2, REA1, and REA2 provided in the second subpixel SP2 of each pixel region B-PA, G-PA, and R-PA may be different from the number of emission regions BEA1, BEA2, GEA1, GEA2, REA1, and REA2 provided in the first subpixel SP1 of the corresponding pixel region B-PA, G-PA, and R-PA. For example, three first blue emission regions BEA1 may be defined in the first subpixel SP1 of the blue pixel region B-PA, and a single second blue emission region BEA2 may be defined in the second subpixel SP2 of the blue pixel region B-PA. Two first green emission regions GEA1 may be defined in the first subpixel SP1 of the green pixel region B-PA, and a single second green emission region GEA2 may be defined in the second subpixel SP2 of the green pixel region G-PA. A single first red emission region REA1 may be defined in the first subpixel SP1 of the red pixel region R-PA, and a single second red emission region REA2 may be defined in the second subpixel SP2 of the red pixel region R-PA.

[0109] The first subpixel SP1 and the second subpixel SP2 of each pixel area B-PA, G-PA, and R-PA can be selectively operated. For example, the first subpixel SP1 of each pixel area B-PA, G-PA, and R-PA can be operated simultaneously with the first subpixel SP1 of an adjacent pixel area B-PA, G-PA, and R-PA, and the second subpixel SP2 of each pixel area B-PA, G-PA, and R-PA can be operated simultaneously with the second subpixel SP2 of an adjacent pixel area B-PA, G-PA, and R-PA. The second subpixel SP2 of each pixel area B-PA, G-PA, and R-PA can have a different viewing angle than the first subpixel SP1 of each pixel area B-PA, G-PA, and R-PA. For example, the second emission area BEA2, GEA2, and REA2 defined in the second subpixel SP2 of each pixel area B-PA, G-PA, and R-PA can have a different planar shape than the first emission area BEA1, GEA1, and REA1 defined in the first subpixel SP1 of the corresponding pixel area B-PA, G-PA, and R-PA. The plane of the second emission area BEA2, GEA2, and REA2 defined in each pixel area B-PA, G-PA, and R-PA can have a circular shape, and the plane of the first emission area BEA1, GEA1, and REA1 defined in each pixel area B-PA, G-PA, and R-PA can have a strip shape extending in the first direction. Therefore, in a display device according to another embodiment of the present disclosure, the second subpixel SP2 of each pixel area B-PA, G-PA, and R-PA can have a wider viewing angle in the first direction than the first subpixel SP1 of the corresponding pixel area B-PA, G-PA, and R-PA. That is, in the display device according to another embodiment of the present disclosure, the image realized by the first subpixel SP1 of each pixel area B-PA, G-PA, and R-PA cannot be recognized by people around the user, and the image realized by the second subpixel SP2 of each pixel area B-PA, G-PA, and R-PA can be shared by the user and people side by side with the user in the first direction. Therefore, in a display device according to another embodiment of the present disclosure, images in a narrow viewing angle mode and images in a wide viewing angle mode can be selectively provided through the first subpixel SP1 and the second subpixel SP2 of each pixel area B-PA, G-PA and R-PA.

[0110] The pixel lens 800 may include a first pixel lens 810 disposed on the first emission region BEA1, GEA1, and REA1 of each pixel region B-PA, G-PA, and R-PA, and a second pixel lens 820 disposed on the second emission region BEA2, GEA2, and REA2 of each pixel region PA. Each of the first pixel lenses 810 may have a shape corresponding to the corresponding first emission region BEA1, GEA1, and REA1, and each of the second pixel lenses 820 may have a shape corresponding to the corresponding second emission region BEA2, GEA2, and REA2. For example, the plane of each first pixel lens 810 may have a circular shape, and the plane of each second pixel lens 820 may have a stripe shape. Each of the first pixel lenses 810 and each of the second pixel lenses 820 may include a region disposed within one of the optical grooves 501h. For example, a portion of each first pixel lens 810 and a portion of each second pixel lens 820 disposed within the corresponding optical groove 501h may be surrounded by the color filters 700B, 700G, and 700G stacked on the optical sidewalls of each optical groove 501h. Therefore, in a display device according to another embodiment of the present disclosure, the traveling direction of light emitted by the emission regions BEA1, BEA2, GEA1, GEA2, REA1, and REA2 of each sub-pixel SP1 and SP2 can be effectively limited, and image degradation due to light leakage and reflection of external light can be prevented. Therefore, in a display device according to another embodiment of the present disclosure, the degree of freedom of the configuration and planar shape of each pixel region B-PA, G-PA, and R-PA can be increased.

[0111] The display device according to an embodiment of the present disclosure is described, in which the blocking pattern 600 may include a black dye. However, in a display device according to another embodiment of the present disclosure, the blocking pattern 600 may include a conductive material. For example, in a display device according to another embodiment of the present disclosure, the touch sensor Cm may be provided between the encapsulation structure 400 and the lens passivation layer 900, as shown in FIG. Figures 22 to 25 As shown. The touch sensor Cm can sense touch by a user and / or a tool. For example, the touch sensor Cm can detect the presence or absence of touch by a user and / or a tool and the touch position using changes in mutual capacitance. The touch sensor Cm may include a driving touch line 510 to which a touch driving signal is applied, and a sensing touch line 520 to which a touch sensing signal is applied.

[0112] Each of the driven touch lines 510 may include a first touch electrode 511 and a first bridging electrode 512. The first bridging electrode 512 may be electrically connected between the first touch electrodes 511. For example, each of the driven touch lines 510 may include the first touch electrodes 511 connected in a first direction via the first bridging electrode 512. Each of the sensing touch lines 520 may include a second touch electrode 521 and a second bridging electrode 522. The second touch electrodes 521 may be disposed between the first touch electrodes 511. For example, the first touch electrodes 511 and the second touch electrodes 512 may be arranged to intersect with each other. Therefore, in a display device according to another embodiment of the present disclosure, a touch by a user and / or a tool can be sensed by using the driven touch lines 510 and the sensing touch lines 520.

[0113] The second bridging electrode 522 may be electrically connected between the second touch electrodes 521. The second touch electrodes 521 may be connected in a second direction different from the first direction. For example, the second touch electrodes 521 may be connected in a direction perpendicular to the first touch electrodes 511 via the second bridging electrode 522. Each of the sensing touch lines 520 may intersect with one of the driving touch lines 510. Each of the second bridging electrodes 522 may intersect with one of the first bridging electrodes 512. The second bridging electrode 522 may be disposed on a different layer from the first bridging electrode 512. For example, the second bridging electrode 522 may be disposed between the encapsulation structure 400 and the optical insulation layer 500, and the first touch electrode 511, the second touch electrode 521, and the first bridging electrode 512 may be disposed on the upper surface of the optical insulation layer 500.

[0114] The first touch electrode 511, the first bridge electrode 512, the second touch electrode 521, and the second bridge electrode 522 may include a material having a relatively low resistance. For example, the first touch electrode 511, the first bridge electrode 512, the second touch electrode 521, and the second bridge electrode 522 may include a metal such as copper (Cu), molybdenum (Mo), titanium (Ti), and tantalum (Ta). The first touch electrode 511, the first bridge electrode 512, the second touch electrode 521, and the second bridge electrode 522 may be covered by the stacked color filters 700B, 700G, and 700R. Therefore, in the display device according to another embodiment of the present disclosure, reflection of external light caused by the first touch electrode 511, the first bridge electrode 512, the second touch electrode 521, and the second bridge electrode 522 can be prevented. That is, in the display device according to another embodiment of the present disclosure, reflection of external light caused by the touch sensor Cm can be prevented. Therefore, in the display device according to another embodiment of the present disclosure, the quality of an image can be improved without reducing the touch sensitivity using the touch sensor Cm.

[0115] The touch sensor Cm may be disposed within the active area AA. The first touch electrode 511, the first bridging electrode 512, the second touch electrode 521, and the second bridging electrode 522 may be disposed outside the emission areas BEA, GEA, and REA defined in each pixel area PA. For example, the first touch electrode 511, the first bridging electrode 512, the second touch electrode 521, and the second bridging electrode 522 may overlap with the bank insulating layer 160. Therefore, in a display device according to another embodiment of the present disclosure, light emitted from the light-emitting device 300 of each pixel area PA toward the adjacent optical insulating layer 500 may be blocked by the first touch electrode 511, the first bridging electrode 512, the second touch electrode 521, and the second bridging electrode 522. That is, in a display device according to another embodiment of the present disclosure, the traveling direction of light emitted from the light-emitting device 300 of each pixel area PA may be limited by the touch sensor Cm. For example, the second bridging electrode 522 disposed between the encapsulation structure 400 and the optical insulation layer 500 can function as a lower barrier pattern, and the first touch electrode 511, the first bridging electrode 512, and the second touch electrode 521 disposed on the upper surface of the optical insulation layer 500 can function as an upper barrier pattern. Therefore, in the display device according to another embodiment of the present disclosure, the process of limiting the traveling direction of light emitted from the light-emitting device 300 in each pixel area PA can be simplified. Furthermore, in the display device according to another embodiment of the present disclosure, image degradation due to light leakage and reflection of external light can be prevented, and production energy can be reduced through process optimization without reducing the sensitivity of touch detection using the touch sensor Cm.

[0116] As a result, the display device according to the embodiment of the present disclosure may include an optical insulating layer and a color filter provided on the light-emitting device, wherein the optical insulating layer may include an optical groove overlapping the emission area, wherein the optical bottom surface of each optical groove may be covered by one of the color filters, and wherein at least two color filters may be stacked on the optical side wall of each optical groove. Therefore, in the display device according to the embodiment of the present disclosure, color mixing and reflection of external light can be prevented by the stacked color filters. Thus, in the display device according to the embodiment of the present disclosure, the quality of the image recognized by the user can be improved. Moreover, in the display device according to the embodiment of the present disclosure, production energy can be reduced by process optimization.

Claims

1. A display device comprising: a first light emitting device disposed on a first emission region of the device substrate; an optical insulating layer, the optical insulating layer being disposed on the first light emitting device, the optical insulating layer comprising a first optical groove overlapping the first emission region; a first color filter disposed on a first bottom surface of the first optical groove, the first color filter extending onto a first sidewall of the first optical groove; as well as a second color filter comprising a different material than the first color filter, the second color filter overlapping the first color filter on the first sidewall of the first optical trench, The first bottom surface of the first optical groove includes an area that does not overlap with the second color filter.

2. The display device according to claim 1, wherein The light passing through the second color filter displays a different color from the light passing through the first color filter.

3. The display device according to claim 1, wherein The first bottom surface of the first optical trench has a larger size than the first emission area.

4. The display device according to claim 1 , further comprising a pixel lens disposed on the optical insulating layer, in, The pixel lens overlaps with the first emission area, The pixel lens includes a region arranged inside the first optical groove.

5. The display device according to claim 4, wherein A surface of the pixel lens opposite to the optical insulating layer has a convex shape.

6. The display device according to claim 1, further comprising a second light emitting device disposed between the second emission region of the device substrate and the optical insulating layer, in, The optical insulating layer includes a second optical groove overlapping the second emission region, wherein the second optical groove is spaced apart from the first optical groove, wherein the first color filter and the second color filter are stacked on the second sidewall of the second optical groove, and The second bottom surface of the second optical groove includes an area that does not overlap with the first color filter.

7. The display device according to claim 6, wherein: The second color filter extends onto the second bottom surface of the second optical trench.

8. The display device according to claim 1, wherein The first color filter and the second color filter extend onto an upper surface of the optical insulating layer opposite to the device substrate.

9. The display device according to claim 8, further comprising an upper blocking pattern provided on the upper surface of the optical insulating layer, in, The upper blocking pattern is covered by the first color filter and the second color filter. 10 . The display apparatus according to claim 9 , further comprising an encapsulation structure disposed between the first light emitting device and the optical insulating layer, and a lower blocking pattern disposed between the encapsulation structure and the optical insulating layer.

11. The display device according to claim 8, further comprising an alignment key provided between the device substrate and the optical insulating layer, in, The alignment key is spaced apart from the first emission area, and At least one of the first color filter and the second color filter includes an opening corresponding to the alignment key.

12. The display device according to claim 1, further comprising an encapsulation structure provided between the first light emitting device and the optical insulating layer, in, The optical insulation layer includes a region disposed between the encapsulation structure and the first bottom surface of the first optical trench.

13. A display device comprising: a light emitting device, the light emitting device being disposed on an emission region of the device substrate; a packaging structure, the packaging structure being disposed on the device substrate and covering the light-emitting device; an optical insulating layer, the optical insulating layer being disposed on the package structure, the optical insulating layer comprising an optical groove exposing a portion of the package structure overlapping the emission region; as well as a color filter stacked on the optical insulating layer, the color filter extending onto a sidewall of each optical trench, wherein light emitted from each emission region exhibits a different color than light emitted from adjacent emission regions, and The central area of the bottom surface of each optical groove is covered by one of the color filters.

14. The display device according to claim 13, wherein: The color filter disposed on the central area of the bottom surface of each optical trench includes a different material from the color filter disposed on the central area of the bottom surface of an adjacent optical trench.

15. The display device according to claim 13, further comprising an alignment key disposed between the device substrate and the package structure, in, The alignment key is spaced apart from the emission area, wherein the optical insulating layer comprises an alignment groove spaced apart from the optical groove, wherein the alignment groove overlaps with the alignment key, and At least two of the color filters extend onto sidewalls of the alignment trench.

16. The display device according to claim 15, wherein At least a portion of a bottom surface of the alignment groove is exposed by the color filter.

17. The display device according to claim 15, wherein: The device substrate includes an active area in which the emission area is disposed and a frame area disposed outside the active area, and Wherein, the alignment key is arranged between the frame area of the device substrate and the packaging structure.

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