KR20200081911A - Display apparatus having a narrow viewing angle - Google Patents

Abstract

The present invention relates to a display device that can narrow a viewing angle. The display device can include light blocking members stacked on an encapsulation member and at least one gap adjusting layer disposed between the light blocking members. The light blocking members cannot overlap a light emitting area of a device substrate. Therefore, the display device according to the technical idea of the present invention can minimize the degradation of process efficiency and control a direction of light emitted from the light emitting device.

Description

Display apparatus having a narrow viewing angle

The present invention relates to a display device capable of narrowing a viewing angle.

In general, electronic devices such as monitors, TVs, notebooks, and digital cameras include display devices for the implementation of images. For example, the display device may be an organic light emitting display device that implements an image using a light emitting device.

The display device may have a narrow viewing angle so that the image provided to the user is not known to others around it. For example, in a display device used in a deposit/withdrawal device of a bank, the viewing angle can be narrowed.

In order to narrow the viewing angle of the display device, a light control film (LCF) may be used. The light control film (LCF) may use a partition wall to adjust the angle of the luminance distribution. However, since the light control film is formed through a separate process and attached to the display panel on which the light emitting element is formed, the process cost may increase and the process efficiency may decrease in the display device. In addition, in the display device, moire may occur as the light control film is positioned farther from the light emitting element, or luminance may be reduced by an optical film for removing the moire.

The problem to be solved by the present invention is to provide a display device capable of minimizing an increase in process cost and a decrease in process efficiency, and narrowing a viewing angle.

Another problem to be solved by the present invention is to provide a display device capable of preventing the occurrence of moiré without reducing luminance and realizing a narrow viewing angle.

The problems to be solved by the present invention are not limited to the aforementioned problems. The tasks not mentioned herein will be clearly understood by those skilled in the art from the following description.

The display device according to the technical idea of the present invention for achieving the above-mentioned problem includes an element substrate. The device substrate includes a light emitting area and a non-light emitting area. A light emitting element is positioned on the light emitting region of the element substrate. The first viewing angle control member is positioned on the non-emission area of the device substrate. The first viewing angle control member includes stacked first light blocking members. An encapsulation member is positioned between the element substrate and the first viewing angle control member. The sealing member covers the light emitting element. Each first light blocking member includes an opening overlapping the light emitting area.

The first viewing angle control member may have a structure in which at least three first light blocking members are stacked.

The first viewing angle control member may further include at least one gap adjusting film positioned between the first light blocking members.

The gap adjusting film may have a thickness thicker than each of the first light blocking members.

The gap adjusting layer may include an organic insulating layer positioned between the inorganic insulating layers. The thickness of the organic insulating film may be thicker than that of each inorganic insulating film.

The openings of each first light blocking member may have the same horizontal width.

Each first light blocking member may have the same thickness.

A second viewing angle control member may be located on the encapsulation member. The second viewing angle control member may overlap the light emitting region. The second viewing angle control member may include stacked second light blocking members. The horizontal width of each second light blocking member may be smaller than the horizontal width of the light emitting region.

The display device according to the technical concept of the present invention for achieving the other object to be solved includes a device substrate. The light emitting element and the sealing member are positioned on the display area of the element substrate. The sealing member covers the light emitting element. On the sealing member, a viewing angle control member is located. The viewing angle control member is located outside the light emitting element. The viewing angle control member includes light blocking members stacked on the encapsulation member and at least one gap adjusting film positioned between the light blocking members.

The surface of the encapsulation member facing the viewing angle control member may be a flat plane.

The device substrate may include a bezel region positioned outside the display region. The encapsulation member and the gap adjustment layer may extend onto the bezel region of the device substrate.

At least one dam may be positioned on the bezel region of the device substrate.

A plurality of dams may be located on the bezel region of the device substrate. The vertical length of dams may increase as the distance from the display area of the device substrate increases.

The display device according to the technical concept of the present invention may include a viewing angle control member composed of light blocking members stacked so as not to overlap with the light emitting element on the sealing member. Accordingly, in the display device according to the technical concept of the present invention, the process of forming the viewing angle control member may be simplified. In addition, in the display device according to the technical concept of the present invention, the viewing angle control member may be positioned relatively close to the light emitting element. Therefore, in the display device according to the technical idea of the present invention, the viewing angle can be narrowed without reducing luminance and generating moire.

1A and 1B are diagrams schematically illustrating a display device according to an exemplary embodiment of the present invention.
FIG. 2 is an enlarged view of region P of FIG. 1.
3 is a graph showing a relative viewing angle of a display device according to an exemplary embodiment of the present invention.
4 to 7 are views showing a display device according to another embodiment of the present invention.

The details of the above object and the technical configuration of the present invention and the effect of the effect thereof will be more clearly understood by the following detailed description with reference to the drawings showing embodiments of the present invention. Here, since the embodiments of the present invention are provided to enable the technical spirit of the present invention to be sufficiently transmitted to those skilled in the art, the present invention may be embodied in other forms so as not to be limited to the embodiments described below.

In addition, parts indicated by the same reference numerals throughout the specification mean the same components, and in the drawings, the length and thickness of a layer or region may be exaggerated for convenience. In addition, when the first component is described as being "on" the second component, the first component and the first component are not only located on the upper side in direct contact with the second component, but also the first component and the Also included is the case where the third component is positioned between the second components.

Here, the terms first, second, etc. are used to describe various components, and are used for the purpose of distinguishing one component from other components. However, the first component and the second component may be arbitrarily named according to the convenience of those skilled in the art without departing from the technical spirit of the present invention.

Terms used in the specification of the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. For example, a component expressed as a singular includes a plurality of components unless the context clearly refers to the singular. Also, in the specification of the present invention, terms such as “comprises” or “haves” are intended to designate the existence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, or It should be understood that it does not preclude the existence or addition possibility of other features or numbers, steps, actions, components, parts or combinations thereof.

In addition, unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms, such as those defined in the commonly used dictionary, should be interpreted as having meanings consistent with meanings in the context of the related art, and unless they are explicitly defined in the specification of the present invention, in an ideal or excessively formal meaning. Is not interpreted.

(Example)

1A is a diagram schematically showing a display area of a display device according to an exemplary embodiment of the present invention. 1B is a diagram schematically illustrating a bezel area of a display device according to an exemplary embodiment of the present invention. FIG. 2 is an enlarged view of region P of FIG. 1.

1A, 1B, and 2, a display device according to an exemplary embodiment of the present invention may include a device substrate 100. The device substrate 100 may include an insulating material. For example, the device substrate 100 may include glass or plastic.

The device substrate 100 may include a display area AA and a bezel area BA. The bezel area BA may be located outside the display area AA. For example, a pad 290 for receiving a signal from the outside may be positioned on the bezel area BA of the device substrate 100.

The display area AA of the device substrate 100 may include a light emitting area EA and a non-light emitting area NEA. In the light emitting region EA of the device substrate 100, light having a specific color may be emitted. For example, the light emitting device 300 may be positioned on the light emitting area EA of the device substrate 100.

The light emitting device 300 may emit light corresponding to the corresponding light emitting area EA. For example, the light emitting device 300 may include a first electrode 310, a light emitting layer 320, and a second electrode 330 stacked in order on the device substrate 100.

The first electrode 310 may include a conductive material. The first electrode 310 may have a relatively high reflectance. For example, the first electrode 310 may include metals such as aluminum (Al) and silver (Ag). The first electrode 310 may have a multi-layer structure. For example, the first electrode 310 may have a structure in which a reflective electrode formed of a material having a relatively high reflectivity is positioned between transparent electrodes formed of a transparent conductive material such as ITO and IZO.

The emission layer 320 may generate light having a luminance corresponding to a voltage difference between the first electrode 310 and the second electrode 330. For example, the light emitting layer 320 may include an emission material layer (EML) including a light emitting material. The light emitting material may include an organic material. For example, the display device according to an embodiment of the present invention may be an organic light emitting display device including a light emitting layer 320 formed of an organic material.

The second electrode 330 may include a conductive material. The second electrode 330 may be a transparent electrode. For example, the second electrode 330 may include a transparent conductive material such as ITO and IZO. Accordingly, in the display device according to the exemplary embodiment of the present invention, light generated by the light emitting layer 320 may be emitted through the second electrode 330. The second electrode 330 may have a different work function from the first electrode 310. For example, the second electrode 330 may include a metal such as aluminum (Al). The second electrode 330 may have a multi-layer structure.

A driving circuit may be positioned between the device substrate 100 and the light emitting device 300. The light emitting device 300 may be controlled by the driving circuit. The driving circuit may provide a driving current according to a gate signal and a data signal to the light emitting device 300. For example, the driving circuit may include at least one thin film transistor 200.

The thin film transistor 200 may be turned on or off according to the gate signal. For example, the thin film transistor 200 may include a semiconductor pattern 210, a gate insulating film 220, a gate electrode 230, an interlayer insulating film 240, a source electrode 250 and a drain electrode 260. have.

The semiconductor pattern 210 may be located close to the device substrate 100. The semiconductor pattern 210 may include a semiconductor material. For example, the semiconductor pattern 210 may include amorphous silicon or polycrystalline silicon. The semiconductor pattern 210 may be an oxide semiconductor. For example, the semiconductor pattern 210 may include IGZO.

The semiconductor pattern 210 may include a source region, a drain region, and a channel region. The channel region may be located between the source region and the drain region. The channel region may have a lower conductivity than the source region and the drain region. For example, the source region and the drain region may have a higher impurity concentration than the channel region.

The gate insulating layer 220 may be positioned on a portion of the semiconductor pattern 210. For example, the gate insulating layer 220 may be positioned on the channel region of the semiconductor pattern 210. The source region and the drain region of the semiconductor pattern 210 may be exposed by the gate insulating layer 220.

The gate insulating layer 220 may include an insulating material. For example, the gate insulating layer 220 may include silicon oxide (SiO) and/or silicon nitride (SiN). The gate insulating layer 220 may have a multi-layer structure. The gate insulating layer 220 may include a high-K material. For example, the gate insulating layer 220 may include hafnium oxide (HfO) or titanium oxide (TiO).

The gate electrode 230 may be positioned on the gate insulating layer 220. The gate electrode 230 may be insulated from the semiconductor pattern 210 by the gate insulating layer 220. For example, the gate electrode 230 may overlap the channel region of the semiconductor pattern 210.

The gate electrode 230 may include a conductive material. For example, the gate electrode 230 may include metals such as aluminum (Al), chromium (Cr), molybdenum (Mo), and tungsten (W).

The interlayer insulating layer 240 may be positioned on the semiconductor pattern 210 and the gate electrode 230. The interlayer insulating layer 240 may extend outside the semiconductor pattern 210. For example, side surfaces of the semiconductor pattern 210 and side surfaces of the gate electrode 230 may be covered by the interlayer insulating layer 240.

The interlayer insulating layer 240 may include an insulating material. For example, the interlayer insulating layer 240 may include silicon oxide (SiO).

The source electrode 250 may be positioned on the interlayer insulating layer 240. The source electrode 250 may be electrically connected to the source region of the semiconductor pattern 210. For example, the interlayer insulating layer 240 may include a contact hole partially exposing the source region of the semiconductor pattern 210. The source electrode 250 may include a region overlapping the source region of the semiconductor pattern 210.

The source electrode 250 may include a conductive material. For example, the source electrode 250 may include metals such as aluminum (Al), chromium (Cr), molybdenum (Mo), and tungsten (W). The source electrode 250 may include a different material from the gate electrode 230.

The drain electrode 260 may be positioned on the interlayer insulating layer 240. The drain electrode 260 may be spaced apart from the source electrode 250. The drain electrode 260 may be electrically connected to the drain region of the semiconductor pattern 210. For example, the interlayer insulating layer 240 may include a contact hole partially exposing the drain region of the semiconductor pattern 210. The drain electrode 260 may include a region overlapping the drain region of the semiconductor pattern 210.

The drain electrode 260 may include a conductive material. For example, the drain electrode 260 may include metals such as aluminum (Al), chromium (Cr), molybdenum (Mo), and tungsten (W). The drain electrode 260 may include the same material as the source electrode 250. The drain electrode 260 may include a different material from the gate electrode 230.

A buffer insulating layer 110 may be positioned between the device substrate 100 and the driving circuit. The buffer insulating layer 110 may prevent contamination by the device substrate 100 in the process of forming the driving circuit. The buffer insulating layer 110 may extend outside the corresponding driving circuit. For example, the buffer insulating layer 110 on the outside of the semiconductor pattern 210 may directly contact the interlayer insulating layer 240.

A lower protective layer 120 and an overcoat layer 130 may be sequentially stacked between the driving circuit and the light emitting device 300. The lower protective layer 120 may prevent damage to the driving circuit due to external moisture and shock. For example, the thin film transistor 200 may be covered by the lower passivation layer 120. The overcoat layer 130 may remove a step caused by the driving circuit. For example, the surface of the overcoat layer 130 facing the light emitting device 300 may be a flat surface.

The lower passivation layer 120 and the overcoat layer 130 may expose a portion of the thin film transistor 200. For example, the lower passivation layer 120 includes a lower contact hole partially exposing the drain electrode 260 of the thin film transistor 200, and the overcoat layer 130 overlaps the lower contact hole It may include an overcoat contact hole. The first electrode 310 of the light emitting device 300 may be electrically connected to the drain electrode 260 of the thin film transistor 200 through the lower contact hole and the overcoat contact hole. For example, the first electrode 310 may extend along the sidewall of the lower contact hole and the sidewall of the overcoat contact hole to directly contact the drain electrode 260.

The lower protective layer 120 and the overcoat layer 130 may include an insulating material. The overcoat layer 130 may include a different material from the lower passivation layer 120. For example, the lower passivation layer 120 may include an inorganic insulating material such as silicon oxide (SiO) and silicon nitride (SiN), and the overcoat layer 130 may include an organic insulating material.

A plurality of light emitting devices 300 may be positioned on the display area AA of the device substrate 100. Each light emitting element 300 may be driven independently. For example, the first electrode 310 of each light emitting device 300 may be spaced apart from the first electrode 310 of the adjacent light emitting device 300. A bank insulating layer 140 may be positioned between adjacent first electrodes 310. The bank insulating layer 140 may define the emission area EA of the device substrate 100. For example, the bank insulating layer 140 may cover the edge of each first electrode 310. A portion of the first electrode 310 exposed by the bank insulating layer 140 may overlap the light emitting region EA of the device substrate 100. The bank insulating layer 140 may overlap the non-emission area NEA of the device substrate 100. The light emitting layer 320 and the second electrode 330 of each light emitting device 300 may be stacked on a portion of the corresponding first electrode 310 exposed by the bank insulating layer 140.

The bank insulating layer 140 may include an insulating material. For example, the bank insulating layer 140 may include an organic insulating material. The bank insulating layer 140 may include a different material from the overcoat layer 130.

An encapsulation member 400 may be positioned on the light emitting device 300. The sealing member 400 may prevent damage to the light emitting device 300 due to external moisture and impact. The encapsulation member 400 may have a multi-layer structure. For example, the encapsulation member 400 may include a first encapsulation layer 410, a second encapsulation layer 420, and a third encapsulation layer 430 stacked in order on the light emitting device 300. have.

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 different materials from 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 formed of an inorganic insulating material, and the second encapsulation layer 420 may be organic insulating layers formed of an organic insulating material. . Accordingly, in the display device according to the exemplary embodiment of the present invention, the step by the light emitting element 300 may be removed by the second encapsulation layer 420. For example, in the display device according to an embodiment of the present invention, the surface of the encapsulation member 400 facing the device substrate 100 may be a flat plane.

The encapsulation member 400 may extend on the non-emission area NEA of the device substrate 100. For example, the encapsulation member 400 may include an area overlapping the bank insulating layer 140. The thickness variation between the light emitting area EA and the non-light emitting area NEA of the device substrate 100 may be removed by the sealing member 400.

The viewing angle control member 500 may be positioned on the encapsulation member 400. The viewing angle control member 500 may control the light emitted from each light emitting device 300 to reduce the viewing angle. For example, the viewing angle control member 500 may include light blocking members 510, 530, and 550 and at least one gap adjusting film 520, 540.

The light blocking members 510, 530, and 550 may be stacked on the sealing member 400. For example, the light blocking members 510, 530, and 550 include a first light blocking member 510 positioned close to the encapsulation member 400, and a second light blocking member positioned on the first light blocking member 510. 530 and a third light blocking member 550 positioned on the second light blocking member 530. The first light blocking member 510 may directly contact the third encapsulation layer 430 of the encapsulation member 400. Accordingly, in the display device according to the exemplary embodiment of the present invention, the viewing angle control member 500 may be located on a flat plane. Therefore, in the display device according to the exemplary embodiment of the present invention, the viewing angle deviation due to the position deviation of the light blocking members 510, 530, and 550 of the viewing angle control member 500 may be prevented.

The light blocking members 510, 530, and 550 may include a material capable of blocking light transmission. The light blocking members 510, 530, and 550 may include an insulating material. The light blocking members 510, 530, and 550 may include the same material. The light blocking members 510, 530, 550 may include a different material from the third encapsulation layer 430. For example, the light blocking members 510, 530, and 550 may include an organic material. The light blocking members 510, 530, and 550 may be a black matrix (BM).

The light blocking members 510, 530, and 550 may be located outside the emission area EA of the device substrate 100. For example, the light blocking members 510, 530, and 550 may overlap the non-emission area NEA of the device substrate 100. Each of the light blocking members 510, 530, and 550 may expose the light emitting region EA of the device substrate 100. For example, the first light blocking member 510 includes a first opening 510h overlapping the light emitting area EA of the device substrate 100, and the second light blocking member 530 includes the first light blocking member 530. A second opening 530h overlapping the one opening 510h may be included, and the third light blocking member 550 may include a third opening 550h overlapping the second opening 530h. Accordingly, in the display device according to the exemplary embodiment of the present invention, light generated by the light emitting layer 320 of the light emitting device 300 is emitted to the outside only through the light emitting area EA of the device substrate 100. Can. Therefore, the viewing angle may be narrow in the display device according to the exemplary embodiment of the present invention.

Openings 510h, 530h, and 550h of each light blocking member 510, 530, 550 may have the same horizontal width 500W. For example, the horizontal width 500W of the first opening 510h is the same as the horizontal width of the emission area EA, and the horizontal width 500W of the second opening 530h is the first opening ( It is the same as the horizontal width 500W of 510h), and the horizontal width 500W of the third opening 550h may be the same as the horizontal width 500W of the second opening 530h. Each light blocking member 510, 530, 550 may have the same thickness (510t, 530t, 550t). For example, the thickness 530t of the second light blocking member 530 is the same as the thickness 510t of the first light blocking member 510, and the thickness 550t of the third light blocking member 550 is the The second light blocking member 530 may have the same thickness 530t. Accordingly, in the display device according to the exemplary embodiment of the present invention, each light blocking member 510, 530, or 550 may have the same shape. That is, in the display device according to the exemplary embodiment of the present invention, the same mask may be used in the process of forming the light blocking members 510, 530, and 550. Therefore, in the display device according to the exemplary embodiment of the present invention, an increase in process cost and a decrease in process efficiency are minimized, and the viewing angle can be effectively narrowed.

The gap control layers 520 and 540 may be located between the light blocking members 510, 530, and 550. For example, in the display device according to the exemplary embodiment of the present invention, the first distance adjusting film 520 in which the viewing angle control member 500 is located between the first light blocking member 510 and the second light blocking member 530 ) And a second gap adjusting film 540 positioned between the second light blocking member 530 and the third light blocking member 550.

The gap control layers 520 and 540 may include an insulating material. The gap control layers 520 and 540 may include a transparent material. The gap control layers 520 and 540 may have a multi-layer structure. For example, the first gap adjusting layer 520 and the second gap adjusting layer 540 are respectively stacked in order, the first insulating layers 521 and 541, the second insulating layers 522 and 542 and the first 3 may include insulating layers 523 and 543.

The first insulating layers 521 and 541 may include materials different from the light blocking members 510, 530, and 550. For example, the first insulating layers 521 and 541 may include an inorganic insulating material. The second insulating layers 522 and 542 may include different materials from the first insulating layers 521 and 541. For example, the second insulating layers 522 and 542 may include an organic insulating material. The third insulating layers 523 and 543 may include different materials from the second insulating layers 522 and 542. For example, the third insulating layers 523 and 543 may include an inorganic insulating material. Accordingly, peeling of the light blocking members 510, 530, and 550 stacked on the sealing member 400 may be prevented in the display device according to the exemplary embodiment of the present invention. In addition, in the display device according to an embodiment of the present invention, penetration of external moisture through the viewing angle control member 500 may be prevented.

The gap control layers 520 and 540 may have a thickness greater than each of the light blocking members 510, 530 and 550. For example, the second insulating layers 522 and 542 formed of an organic material may be thicker than the first insulating layers 521 and 541 and the third insulating layers 523 and 543 formed of an inorganic material. Accordingly, the display device according to the exemplary embodiment of the present invention may sufficiently space between adjacent light blocking members 510, 530, and 550 through the thickness of the gap adjusting layers 520 and 540. That is, in the display device according to the exemplary embodiment of the present invention, the number of light blocking members 510, 530, and 550 stacked may be minimized. For example, the display device according to an exemplary embodiment of the present invention may implement a sufficiently narrow viewing angle with only three light blocking members 510, 530, and 550. Therefore, in the display device according to the embodiment of the present invention, an increase in process cost and a decrease in process efficiency can be minimized.

An upper planarization layer 600 may be positioned on the viewing angle control member 500. The upper planarization layer 600 may prevent damage to the viewing angle control member 500 due to external impact. The upper planarization layer 600 may include an insulating material. The upper planarization layer 600 may include a different material from the third light blocking member 530. For example, the upper planarization layer 600 may include an inorganic insulating material. Accordingly, peeling of the upper planarization layer 600 may be prevented in the display device according to the exemplary embodiment of the present invention.

An optical member 700 may be positioned on the upper planarization layer 600. The optical member 700 may improve the quality of the image by light emitted through the openings 510h, 530h, and 550h of the viewing angle control member 500. For example, the optical member 700 may be a stacked structure of a quarter wave plate 710 and a linear polarizing plate 720 to prevent reflection of external light. The upper planarization layer 600 may remove a step caused by the viewing angle control member 500. For example, a surface of the upper planarization layer 600 facing the viewing angle control member 500 may be a flat plane. Accordingly, in the display device according to the exemplary embodiment of the present invention, a process of forming the optical member 700 may be simplified. In addition, in the display device according to the exemplary embodiment of the present invention, luminance deviation caused by the optical member 700 may be prevented.

The encapsulation member 400, the gap adjustment layers 520 and 540, and the upper planarization layer 600 may extend on the bezel region BA of the device substrate 100. A common voltage supply wiring 280 may be positioned on the bezel area BA of the device substrate 100. In the display device according to the exemplary embodiment of the present invention, the second electrode 330 of each light emitting element 300 may function as a common electrode. For example, the second electrode 330 may extend on the bank insulating layer 140 and be connected to the common voltage supply wiring 280 on the bezel area BA of the device substrate 100. The encapsulation member 400, the gap adjustment layers 520 and 540, and the upper planarization layer 600 may extend on the common voltage supply wiring 280. For example, the common voltage supply wiring 280 may be completely covered by the encapsulation member 400, the gap adjustment layers 520, 540, and the upper planarization layer 600.

The common voltage supply wiring 280 may be located closer to the display area AA than the pad 290. An end of the common voltage supply wiring 280 toward the pad 290 may be covered by a wiring insulation member 950. The wiring insulation member 950 may be formed on the display area AA of the device substrate 100 through a process of forming components. For example, the wiring insulating member 950 has an insulating lower layer 951 having the same material and thickness as the overcoat layer 130 and an insulating upper layer 952 having the same material and thickness as the bank insulating layer 140. It may be a laminated structure.

Dams 910 and 920 may be located on the surface of the common voltage supply wiring 280. The dams 910 and 920 may be located side by side. For example, the dams 910 and 920 may include a first dam 910 and a second dam 920. The first dam 910 may be located close to the display area AA of the device substrate 100. The second dam 920 may be located between the first dam 910 and the wiring insulation member 950. The dams 910 and 920 may block the extension of the gap control layers 520 and 540. For example, the second insulating layers 522 and 542 of each gap control layer 520 and 540 formed of an organic material may be blocked by the dams 910 and 920. The dams 910 and 920 may be formed through a process of forming components positioned between the device substrate 100 and the first gap adjusting layer 520. The first dam 910 may have a smaller vertical length than the second dam 920. For example, the first dam 910 includes a first lower layer 911 having the same material and thickness as the bank insulating layer 140 and a first upper layer having the same material and thickness as the first light blocking member 510. It may be a laminated structure of (912). The second dam 920 includes a second lower layer 921 having the same material and thickness as the overcoat layer 130, an intermediate layer 922 having the same material and thickness as the bank insulating layer 140, and the first. It may be a stacked structure of the second upper layer 923 having the same material and thickness as the light blocking member 510. Accordingly, in the display device according to the exemplary embodiment of the present invention, the pad 290 may not be covered by the gap adjusting films 520 and 540 of the viewing angle control member 500. That is, in the display device according to the exemplary embodiment of the present invention, an additional process for opening the pad 290 may not be required.

3 is a graph showing luminance according to viewing angles depending on whether or not the viewing angle control member 500 is formed.

Referring to FIG. 3, it is understood that the display device S1 in which the viewing angle control member 500 is formed decreases in luminance rapidly as the viewing angle increases compared to the display device S2 in which the viewing angle control member 500 is not formed. Can. In addition, referring to FIG. 3, it is understood that the front luminance of the display device S1 on which the viewing angle control member 500 is formed is not different from the front luminance of the display device S2 on which the viewing angle control member 500 is not formed. Can. Therefore, in the display device according to the exemplary embodiment of the present invention, the viewing angle may be narrowed without reducing the front luminance by the viewing angle control member 500.

As a result, the display device according to the exemplary embodiment of the present invention is positioned on the encapsulation member 400 covering the light emitting device 300, and the light blocking members 510 and 530 overlap the non-emission area NEA of the device substrate 100. , 550 and at least one gap adjusting film 520, 540 positioned between the light blocking members 510, 530, 550. Accordingly, in the display device according to the exemplary embodiment of the present invention, the light emitting element 300 is formed by the viewing angle control member 500 composed of the light blocking members 510, 530, and 550 and the gap adjusting films 520 and 540. The emission direction of light generated by the light emitting layer 320 may be adjusted. That is, in the display device according to the embodiment of the present invention, the cost and the number of processes consumed in the process of forming the viewing angle control member 500 may be minimized. In addition, in the display device according to an embodiment of the present invention, the viewing angle control member 500 may be positioned close to the light emitting element 300. Therefore, in the display device according to the embodiment of the present invention, generation of moire by the viewing angle control member 500 may be prevented.

In the display device according to an embodiment of the present invention, it is described that a single light emitting area EA is formed on each first electrode 310. However, in the display device according to another embodiment of the present invention, a plurality of light emitting regions EA that implement the same color may be formed on each first electrode 310. For example, as shown in FIG. 4, in the display device according to another exemplary embodiment of the present invention, the bank insulating layer 140 may define two emission regions EA on one first electrode 310. have. In the display device according to another embodiment of the present invention, each light blocking member 510, 530, 550 of the viewing angle control member 500 overlaps with the intermediate area CA positioned between the two light emitting areas EA It may include. Accordingly, in the display device according to another embodiment of the present invention, the viewing angles of the two emission regions EA defined on one first electrode 310 may be narrowed. Therefore, in the display device according to another embodiment of the present invention, the viewing angle of each light emitting area EA can be easily adjusted.

In the display device according to an exemplary embodiment of the present invention, it is described that the first dam 910 is covered by the third insulating layer 543 and the upper planarization layer 600 of the second gap adjusting layer 540. However, as illustrated in FIG. 5, in the display device according to another embodiment of the present invention, the second gap adjusting layer 540 may extend onto the first dam 910. That is, in the display device according to another embodiment of the present invention, even if some of the gap adjusting films 520 and 540 pass over the first dam 910, the second dam having a relatively large vertical length ( 920, the gap control layers 520 and 540 may not cover the pad 290. Accordingly, in the display device according to another embodiment of the present invention, an increase in process cost and a decrease in process efficiency are effectively minimized, and a viewing angle may be narrowed.

In the display device according to an embodiment of the present invention, it is described that a plurality of dams 910 and 920 are located on the surface of the power supply voltage supply wiring 280. However, in the display device according to another embodiment of the present invention, the extension of the sealing member 400 and the gap adjusting films 520 and 540 may be blocked by one dam. For example, as shown in FIG. 6, in the display device according to another embodiment of the present invention, only the second dam 920 having a relatively large vertical length may be located on the surface of the power supply voltage supply wiring 280. have.

According to another embodiment of the present invention, it is described that a single dam 920 is located on the surface of the power supply voltage supply wiring 280. However, in the display device according to another embodiment of the present invention, one or more dams 910, 920, and 930 may be located on the surface of the power supply voltage supply wiring 280 than the number of the gap control layers 520 and 540. have. For example, as shown in FIG. 7, in the display device according to another embodiment of the present invention, the first dam 910, the second dam 920, and the first dam 910, on the surface of the power supply voltage supply wiring 280 3 dam 930 may be located. The third dam 930 may be located between the first dam 910 and the second dam 920. The vertical length of the third dam 930 may be between the vertical length of the first dam 910 and the vertical length of the second dam 920. For example, the third dam 930 may include a third lower layer 931 having the same material and thickness as the overcoat layer 130 and a third upper layer having the same material and thickness as the bank insulating layer 140 ( 932). Accordingly, in the display device according to another exemplary embodiment of the present invention, as the vertical lengths of the dams 910, 920, and 930 positioned on the surface of the power supply voltage supply wiring 280 become farther from the display area AA, Can be increased. Therefore, in the display device according to another embodiment of the present invention, the covering of the pad 290 by the gap adjusting films 520 and 540 can be effectively prevented. That is, in the display device according to another embodiment of the present invention, an increase in process cost and a decrease in process efficiency are minimized, and the viewing angle can be effectively narrowed.

100: element substrate 300: light-emitting element
400: sealing member 500: viewing angle control member
510, 530, 550: light blocking member 520, 540: spacing control film
700: optical member

Claims (13)

A device substrate including a light emitting region and a non-light emitting region;
A light emitting device located on the light emitting region of the device substrate;
A viewing angle control member positioned on the non-emission region of the device substrate and including stacked light blocking members; And
It is located between the device substrate and the viewing angle control member, and includes an encapsulation member covering the light emitting device,
Each light blocking member includes an opening overlapping the light emitting area. According to claim 1,
The viewing angle control member is a display device having a structure in which at least three light blocking members are stacked. According to claim 1,
The viewing angle control member further includes at least one gap adjusting film positioned between the light blocking members. The method of claim 3,
The gap control film is a display device having a thickness thicker than each light blocking member. The method of claim 3,
The gap adjusting film includes an organic insulating film positioned between the inorganic insulating films,
The thickness of the organic insulating film is a display device thicker than the thickness of each inorganic insulating film. According to claim 1,
The display device of each light blocking member has the same horizontal width. According to claim 1,
Each light blocking member has a display device having the same thickness. According to claim 1,
The light emitting device includes a first electrode, a light emitting layer and a second electrode stacked in order,
Each light blocking member includes a region overlapping a portion of the first electrode exposed by the bank insulating layer. A light emitting element located on a display area of the element substrate;
An encapsulation member positioned on the display area of the device substrate and covering the light emitting device; And
On the sealing member includes a viewing angle control member located on the outside of the light emitting element,
The viewing angle control member includes a light blocking member stacked on the sealing member and at least one gap adjusting film positioned between the light blocking members. The method of claim 9,
A display device having a flat surface on the surface of the encapsulation member facing the viewing angle control member. The method of claim 9,
The device substrate includes a bezel area located outside the display area,
The encapsulation member and the gap adjusting film extend on a bezel region of the device substrate. The method of claim 11,
A display device further comprising at least one dam located on the bezel area of the device substrate. The method of claim 12,
A plurality of dams are located on the bezel region of the device substrate,
The vertical length of the dams increases as the distance from the display area of the device substrate increases.

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