KR102630570B1 - Display device - Google Patents

Abstract

The present invention provides a display device that can prevent a light emitting element from being peeled off during physical impact. A display device according to an embodiment of the present invention includes a substrate, a plurality of light-emitting devices disposed on one side of the substrate, an encapsulation film formed on the plurality of light-emitting devices and including at least one metal film, and a surface facing the one side. It includes a plurality of shock relief patterns disposed on the other side of the substrate to relieve shock applied from the outside.

Description

Display device {DISPLAY DEVICE}

The present invention relates to a display device.

As the information society develops, the demand for display devices for displaying images is increasing in various forms. Accordingly, recently, non-light emitting displays such as liquid crystal displays (LCDs), plasma display panels (PDPs), organic light emitting displays (OLEDs), and quantum dot emitting displays have been developed. Various display devices, such as electroluminescence displays (QLED: Quantum dot Light Emitting Display), are being used.

Among display devices, organic light emitting displays and quantum dot light emitting displays are self-emitting types and have superior viewing angles and contrast ratios compared to liquid crystal displays (LCDs). They do not require a separate backlight, allowing for lightweight and thin design, and are expected to increase consumption. Power is an advantage. In addition, organic light emitting display devices have the advantage of being capable of driving at low direct current voltages, having a fast response speed, and especially low manufacturing costs.

However, organic light emitting display devices have the disadvantage that the light emitting elements are easily deteriorated by external factors such as external moisture and oxygen. To prevent this, the organic light emitting display device forms an encapsulation film on the substrate on which the light emitting device is formed to prevent external moisture and oxygen from penetrating into the light emitting device.

The substrate on which the light emitting device is formed and the encapsulation film have different elastic recovery speeds to external shocks. Since the encapsulation film has a slower recovery rate from impact than the substrate on which the light emitting device is formed, stress is applied to the light emitting device. As a result, the light emitting device may be peeled off and defects may occur.

The present invention provides a display device that can prevent a light emitting element from being peeled off during physical impact.

A display device according to an embodiment of the present invention includes a substrate, a plurality of light-emitting devices disposed on one side of the substrate, an encapsulation film formed on the plurality of light-emitting devices and including at least one metal film, and a substrate facing one side. It includes a plurality of shock relief patterns that are disposed on the other surface to relieve shock applied from the outside.

According to the present invention, a light emitting device and an encapsulation film are formed on one side of the first substrate, and a plurality of impact relief patterns are formed on the other side of the first substrate. The plurality of shock relief patterns can absorb and relieve shocks applied from the outside and minimize shocks transmitted to the encapsulation film formed on one side of the first substrate. Accordingly, it is possible to minimize deformation of the encapsulation film and minimize stress due to a difference in restoration speed between the first substrate on which the light emitting device is formed and the encapsulation film.

In addition, the present invention forms a plurality of impact relieving patterns in the non-emission area so that physical shock is concentrated in the non-emission area. Accordingly, the present invention can alleviate the impact applied to the light emitting unit.

Additionally, the present invention can prevent the light emitting layer and the second electrode from being separated by minimizing the impact and stress applied to the light emitting layer and the second electrode disposed in the light emitting unit.

Additionally, in the present invention, by forming a spacer having an inverted trapezoidal shape, the light emitting layer and the second electrode are deposited in a disconnected form on the spacer. That is, in the present invention, the light-emitting layer and the second electrode disposed in the non-light-emitting portion are disconnected from the light-emitting layer and the second electrode disposed in the light-emitting portion. Accordingly, even if an impact is applied to the light-emitting layer and the second electrode disposed in the non-light-emitting portion, the impact can be prevented from propagating to the light-emitting layer and the second electrode disposed in the light-emitting portion.

Additionally, the present invention can block shock from being transmitted to the encapsulation film by disposing a shock absorbing layer between the encapsulation film and the light emitting device.

The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. .

1 is a perspective view showing a display device according to an embodiment of the present invention.
Figure 2 is a plan view schematically showing pixels arranged in a display device according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view showing an embodiment of II of FIG. 2.
Figure 4 is a diagram for explaining the difference in restoration speed between the first substrate on which the light emitting device is formed and the encapsulation film.
Figure 5 is a cross-sectional view showing various shapes of a plurality of impact mitigation patterns.
Figure 6 is a cross-sectional view showing an example in which voids are formed in a plurality of impact relief patterns.
FIG. 7 is a cross-sectional view showing another embodiment of II of FIG. 2.
FIG. 8 is a cross-sectional view showing another embodiment of II of FIG. 2.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. These embodiments only serve to ensure that the disclosure of the present invention is complete, and those skilled in the art It is provided to fully inform the person of the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are illustrative, and the present invention is not limited to the matters shown. Like reference numerals refer to like elements throughout the specification. Additionally, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

When 'includes', 'has', 'consists of', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the plural is included unless specifically stated otherwise.

When interpreting a component, it is interpreted to include the margin of error even if there is no separate explicit description.

In the case of a description of a positional relationship, for example, if the positional relationship of two parts is described as 'on top', 'on the top', 'on the bottom', 'next to', etc., 'immediately' Alternatively, there may be one or more other parts placed between the two parts, unless 'directly' is used.

In the case of a description of a temporal relationship, for example, if a temporal relationship is described as 'after', 'successfully after', 'after', 'before', etc., 'immediately' or 'directly' Unless used, non-consecutive cases may also be included.

Although first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are merely used to distinguish one component from another. Accordingly, the first component mentioned below may also be the second component within the technical spirit of the present invention.

“X-axis direction,” “Y-axis direction,” and “Z-axis direction” should not be interpreted as only geometrical relationships in which the relationship between each other is vertical, and should not be interpreted as a wider range within which the configuration of the present invention can function functionally. It can mean having direction.

The term “at least one” should be understood to include all possible combinations from one or more related items. For example, “at least one of the first, second, and third items” means each of the first, second, or third items, as well as two of the first, second, and third items. It can mean a combination of all items that can be presented from more than one.

Each feature of the various embodiments of the present invention can be partially or fully combined or combined with each other, various technical interconnections and operations are possible, and each embodiment can be implemented independently of each other or together in a related relationship. It may be possible.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

1 is a perspective view showing a display device according to an embodiment of the present invention.

Below, the description focuses on the fact that the display device according to an embodiment of the present invention is an organic light emitting display, but the present invention is not limited thereto. That is, the display device according to an embodiment of the present invention is not only an organic light emitting display device, but also a liquid crystal display device, a field emission display device, and a quantum dot light emitting diode display device. ) and an electrophoresis display.

Referring to FIG. 1, a display device 100 according to an embodiment of the present invention includes a display panel 110, a source drive integrated circuit (hereinafter referred to as “IC”) 140, and a flexible film 150. , a circuit board 160, and a timing control unit 170.

The display panel 110 includes a first substrate 111 and a second substrate 112. The second substrate 112 may be an encapsulation substrate. The first substrate 111 may be a plastic film or a glass substrate. The second substrate 112 may be a plastic film, a glass substrate, or an encapsulation film.

The first substrate 111 may be made of a transparent material or an opaque material. The first substrate 111 may be made of a transparent material when the display device is made of a so-called bottom emission method in which the emitted light is emitted downward. Alternatively, the first substrate 111 may be made of not only a transparent material but also an opaque material when the display device is made of a so-called top emission method in which the emitted light is emitted upward.

Gate lines, data lines, and pixels are formed on one side of the first substrate 111 facing the second substrate 112. Pixels are provided in an area defined by the intersection structure of gate lines and data lines.

Each of the pixels may include a thin film transistor and a light emitting element including a first electrode, a light emitting layer, and a second electrode. Each of the pixels uses a thin film transistor to supply a predetermined current to the light emitting device according to the data voltage of the data line when a gate signal is input from the gate line. Because of this, the light emitting element of each pixel can emit light with a predetermined brightness according to a predetermined current. A description of the structure of each pixel will be described later in conjunction with FIG. 3.

The display panel 110 can be divided into a display area where pixels are formed to display images and a non-display area where images are not displayed. Gate lines, data lines, and pixels may be formed in the display area. Gate drivers and pads may be formed in the non-display area.

The gate driver supplies gate signals to the gate lines according to the gate control signal input from the timing control unit 170. The gate driver may be formed in a non-display area outside one or both sides of the display area of the display panel 110 using a GIP (gate driver in panel) method. Alternatively, the gate driver may be manufactured as a driving chip, mounted on a flexible film, and attached to a non-display area outside one or both sides of the display area of the display panel 110 using a TAB (tape automated bonding) method.

The source drive IC 140 receives digital video data and source control signals from the timing control unit 170. The source drive IC 140 converts digital video data into analog data voltages according to the source control signal and supplies them to the data lines. When the source drive IC 140 is manufactured as a driving chip, it may be mounted on the flexible film 150 using a chip on film (COF) or chip on plastic (COP) method.

Pads, such as data pads, may be formed in the non-display area of the display panel 110. Wires connecting the pads and the source drive IC 140 and wires connecting the pads and the wires of the circuit board 160 may be formed in the flexible film 150. The flexible film 150 is attached to the pads using an anisotropic conducting film, so that the pads and the wiring of the flexible film 150 can be connected.

The circuit board 160 may be attached to the flexible films 150. The circuit board 160 may be equipped with multiple circuits implemented with driving chips. For example, the timing control unit 170 may be mounted on the circuit board 160. The circuit board 160 may be a printed circuit board or a flexible printed circuit board.

The timing control unit 170 receives digital video data and timing signals from an external system board through a cable of the circuit board 160. The timing control unit 170 generates a gate control signal for controlling the operation timing of the gate driver and a source control signal for controlling the source drive ICs 140 based on the timing signal. The timing control unit 170 supplies a gate control signal to the gate driver and a source control signal to the source drive ICs 140.

Figure 2 is a plan view schematically showing pixels arranged in a display device according to an embodiment of the present invention. FIG. 3 is a cross-sectional view showing an embodiment of line II of FIG. 2. FIG. 4 is a diagram illustrating the difference in restoration speed between the first substrate and the encapsulation film, FIG. 5 is a cross-sectional view showing various shapes of a plurality of impact relief patterns, and FIG. 6 is a diagram showing a plurality of impact relief patterns with voids formed in them. This is a cross-sectional view showing an example.

2 to 6, the first substrate 111 of the display panel 110 according to an embodiment of the present invention includes a plurality of transistors 210, a planarization film 220, and a first electrode 230. , a light emitting layer 240, a second electrode 250, a bank 225, a first adhesive layer 260, an encapsulation film 270, and a plurality of impact relieving patterns 280 are formed. A plurality of color filters CF1, CF2, and CF3, a second adhesive layer 290, and a polarizing film 250 may be further formed on the first substrate 111.

Gate lines, data lines, a plurality of transistors 210, and a plurality of color filters CF1, CF2, and CF3 are formed on one side of the first substrate 111 facing the second substrate 112. Gate lines and data lines may be arranged to cross each other. The gate lines are connected to the gate driver and receive gate signals. The data lines are connected to the data driver and receive data voltages.

A plurality of transistors 210 are arranged for each pixel (P1, P2, and P3). The plurality of transistors 210 may be disposed in the non-emission area (NEA) when the display device is configured with a bottom emission method in which the emitted light is emitted downward. Alternatively, the plurality of transistors 210 may be disposed in the emitting area (EA) or the non-emitting area (NEA) when the display device is configured as a top emitting type in which the emitted light is emitted upward. Here, the light emitting portion EA is an area where a first electrode, a light emitting layer, and a second electrode are sequentially stacked to emit light. The non-emissive area (NEA) is an area disposed between the light-emitting areas (EA) and does not emit light.

Each of the plurality of transistors 210 includes an active layer, a gate electrode, a source electrode, and a drain electrode. The plurality of transistors 210 may be a top gate type in which the gate electrode is located at the top of the active layer, a bottom gate type in which the gate electrode is located at the bottom of the active layer, or a gate type. It can be formed in a double gate method where the electrode is located both on the top and bottom of the active layer.

A protective film may be formed on the plurality of transistors 210. The protective film may serve as an insulating film. The protective film may be formed of an inorganic film, for example, a silicon oxide film, a silicon nitride film, or a multilayer thereof. The protective film may be omitted.

A plurality of color filters (CF1, CF2, CF3) are arranged for each pixel (P1, P2, P3). The plurality of color filters CF1, CF2, and CF3 are used to connect the first substrate 111 and the first electrode 230, as shown in FIG. 3, when the display device is configured as a bottom emission type in which light emitted from the display device is emitted downward. ) can be placed between. At this time, the plurality of color filters CF1, CF2, CF3 may be formed on the same layer as any one of the active layer, gate electrode, source electrode, and drain electrode constituting the plurality of transistors 210, but is not necessarily limited to this. does not When a protective film is formed on the plurality of transistors 210, a plurality of color filters CF1, CF2, and CF3 may be formed on the protective film.

Meanwhile, a plurality of color filters CF1, CF2, and CF3 may be formed between the second substrate 112 and the second electrode 250 when the display device is configured with a top emission method in which the emitted light is emitted upward. .

A plurality of color filters (CF1, CF2, CF3) are formed in the light emitting unit (EA) and include first to third color filters (CF1, CF2, CF3) having different transmission wavelength ranges. The first color filter (CF1) may be a red color filter, the second color filter (CF2) may be a green color filter, and the third color filter (CF3) may be a blue color filter. In this case, the first color filter (CF1) is formed of an organic film containing a red pigment, the second color filter (CF2) is formed of an organic film containing a green pigment, and the third color filter (CF3) is formed of an organic film containing a green pigment. It can be formed as an organic film containing a blue pigment.

A planarization film 220 may be formed to flatten the steps caused by the plurality of transistors 210 and the plurality of color filters CF1, CF2, and CF3. The planarization film 220 may be formed of an organic film such as acryl resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin. there is.

A plurality of light emitting elements and a bank 225 are formed on the planarization film 220. The plurality of light-emitting devices include a first electrode 230, a light-emitting layer 240, and a second electrode 250. The first electrode 230 may be an anode electrode, and the second electrode 250 may be a cathode electrode. An area where the first electrode 230, the light emitting layer 240, and the second electrode 250 are sequentially stacked may be defined as the light emitting area (EA).

The first electrodes 230 may be disposed on the planarization film 220 and spaced apart from each other at predetermined intervals. Each of the first electrodes 230 is connected to the drain electrode of the transistor 210 through a contact hole penetrating the planarization film 220. At this time, when a gate signal is input from the gate line, the transistors 210 supply a predetermined voltage to each of the first electrodes 230 according to the data voltage of the data line.

The first electrode 230 is made of a transparent metal material (TCO, Transparent Conductive Material) such as ITO or IZO, or magnesium (Mg), which can transmit light when the display device is made of a bottom emission method in which the emitted light is emitted toward the bottom. ), silver (Ag), or an alloy of magnesium (Mg) and silver (Ag). Alternatively, the first electrodes 230 may have a stacked structure of aluminum and titanium (Ti/Al/Ti) or a stacked structure of aluminum and ITO (ITO/Al/ It can be formed of a highly reflective metal material such as ITO), APC alloy, and a laminated structure of APC alloy and ITO (ITO/APC/ITO). APC alloy is an alloy of silver (Ag), palladium (Pd), and copper (Cu).

The bank 225 may be formed to cover the edges of each of the first electrodes 230 on the planarization film 220 to partition the light emitting units EA. That is, the opening area in which the bank 225 is not formed in the plurality of pixels P1, P2, and P3 becomes the light emitting area EA. On the other hand, the area where the bank 225 is formed in the plurality of pixels (P1, P2, and P3) becomes the non-emission area (NEA).

The bank 225 is formed by covering the ends of each of the first electrodes 230. Accordingly, the first electrodes 230 patterned for each pixel (P1, P2, and P3) may be insulated by the bank 225. In addition, it is possible to prevent the problem of deterioration of luminous efficiency due to current being concentrated at the ends of each of the first electrodes 230.

This bank 225 can be formed of an organic film such as acryl resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin. However, it is not necessarily limited to this.

The light emitting layer 240 is formed on the first electrodes 230 and the bank 225. The light emitting layer 240 may include a hole transporting layer, at least one light emitting layer, and an electron transporting layer. In this case, when voltage is applied to the first electrode 230 and the second electrode 250, holes and electrons move to the light-emitting layer through the hole transport layer and the electron transport layer, respectively, and combine with each other in the light-emitting layer to emit light.

The light emitting layer 240 may be made of a white light emitting layer that emits white light. In this case, the light emitting layer 240 may be a common layer commonly formed in the pixels P1, P2, and P3, as shown in FIG. 3.

Alternatively, the light-emitting layer 240 may be made of a red light-emitting layer that emits red light, a green light-emitting layer that emits green light, or a blue light-emitting layer that emits blue light. In this case, unlike shown in FIG. 3, the light emitting layer 240 may be patterned in areas corresponding to each of the first electrodes 230 for each pixel (P1, P2, and P3), and the color filters (CF1, CF2, CF3) may not be formed.

The second electrode 250 is formed on the light emitting layer 240. The second electrode 250 has a stacked structure of aluminum and titanium (Ti/Al/Ti) or a stacked structure of aluminum and ITO (ITO/Al/ITO) when the display device is made of a bottom-emitting method in which the emitted light is emitted toward the bottom. ), APC alloy, and a laminated structure of APC alloy and ITO (ITO/APC/ITO). APC alloy is an alloy of silver (Ag), palladium (Pd), and copper (Cu).

Alternatively, the second electrode 250 may be made of a transparent metal material (TCO, Transparent Conductive Material) such as ITO or IZO, which can transmit light, or magnesium ( It may be formed of a semi-transmissive conductive material such as Mg), silver (Ag), or an alloy of magnesium (Mg) and silver (Ag). A capping layer may be formed on the second electrode 282.

An encapsulation film 270 is formed on the light emitting device. The encapsulation film 270 is adhered to the first substrate 111 on which the light-emitting device is formed by the first adhesive layer 260, preventing oxygen or moisture from penetrating into the light-emitting layer 240 and the second electrode 250 of the light-emitting device. It plays a role in preventing To this end, the encapsulation film 270 may include at least one metal film. Alternatively, the encapsulation film 270 may include at least one organic film and at least one metal film.

The organic layer may be formed to cover the display area, and in particular, may be formed to cover the second electrode 250. The organic film may contain one or more types of acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, and olefin. However, it is not necessarily limited to this.

The metal film is disposed on the organic film to block oxygen or moisture from penetrating from the outside. The metal film may include one or more types of copper (Cu), zinc, iron (Fe), aluminum (Al), molybdenum (Mo), etc., but is not limited thereto.

The metal film constituting the encapsulation film 270 has good barrier performance to block external oxygen or moisture, but has a slow recovery rate against external shock. Since the recovery speed of the first substrate 111 on which the light-emitting devices are formed is faster than that of the encapsulation film 270, after an external shock is applied, the first substrate 111 on which the light-emitting devices are formed is faster than the encapsulation film 270. Restoration takes place.

As shown in FIG. 4, the first substrate 111 on which the light emitting device is formed is restored, but the encapsulation film 270 may not be completely restored. At this time, in the area SA where the impact was applied, stress occurs between the light emitting device and the encapsulation film 270 due to a difference in restoration speed between the first substrate 111 on which the light emitting device is formed and the encapsulation film 270. As a result, the light emitting layer 240 or the second electrode 250 of the light emitting device, which has relatively weak adhesive strength, may be peeled off. In particular, when the light-emitting layer 240 or the second electrode 250 disposed in the light-emitting portion EA is peeled off, the light-emitting portion EA may not emit light, and defective pixels may occur in the display device 100. .

The display panel 100 according to an embodiment of the present invention includes a plurality of impact mitigation patterns 280 to relieve shock applied from the outside.

A plurality of impact mitigation patterns 280 are formed on the other surface of the first substrate 111. The other side of the first substrate 111 corresponds to the side opposite to the side of the first substrate 111 on which the light emitting device is formed. That is, a light emitting device is formed on one side of the first substrate 111, and a plurality of impact relief patterns 280 are formed on a side opposite to the side where the light emitting device is formed.

A plurality of impact mitigation patterns 280 are formed on the other surface of the first substrate 111 at predetermined intervals. The plurality of impact mitigation patterns 280 may be arranged to overlap the bank 225 . That is, a plurality of impact mitigation patterns 280 may be formed in the non-emission area (NEA).

As long as the plurality of impact mitigation patterns 280 are formed in the non-emission area (NEA) and not in the light-emitting area (EA), they can be modified into various embodiments. In one embodiment, the plurality of impact mitigation patterns 280 have the same width as the bank 225, as shown in FIG. 2(a), and may be formed in the same area as the bank 225. . In another embodiment, the plurality of impact mitigation patterns 280 may have a width smaller than that of the bank 225 as shown in FIG. 2(b). In another embodiment, the plurality of impact mitigation patterns 280 have a horizontal (X-axis) cross-section that has a square shape or a circular shape, as shown in FIG. 2(c) or 2(d). can be formed.

Shocks applied from the outside may be concentrated into a plurality of shock mitigation patterns 280. That is, even if an impact is applied from the outside, the physical impact is concentrated in the non-emission area (NEA) where the plurality of impact relief patterns 280 are formed, and the impact can be alleviated in the light-emitting area (EA). Accordingly, the light emitting layer 240 and the second electrode 250 disposed in the light emitting portion EA can be prevented from peeling.

In addition, when the display device is configured with a bottom emission method in which the emitted light is emitted toward the bottom, a plurality of impact relief patterns 280 are formed in the non-emission area (NEA) but not in the light emitting area (EA), so that the light emitting area It is possible to prevent light efficiency from decreasing due to the plurality of impact relief patterns 280 in (EA).

The plurality of impact mitigation patterns 280 may be patterned into various shapes.

In one embodiment, the plurality of impact mitigation patterns 280 may have a vertical (Z-axis) cross-sectional shape as shown in FIG. 5A. More specifically, the plurality of impact mitigation patterns 280 include a first surface 280a in contact with the other surface of the substrate and a second surface 280b facing the first surface 280a, and the first surface 280a may have a trapezoidal shape with a width greater than the width of the second surface 280b. The plurality of impact relieving patterns 280 form the first surface 280a to be larger than the second surface 280b, thereby minimizing damage caused by the concentration of impacts applied from the outside.

In another embodiment, the plurality of impact mitigation patterns 280 may have a semicircular cross-sectional shape as shown in FIG. 5B. More specifically, the first surface 280a of the plurality of impact mitigation patterns 280 in contact with the other surface of the substrate may be flat, and the second surface 280b facing the first surface 280a may have a curved surface. The first surface 280a of the plurality of impact relief patterns 280 is formed to be flat, thereby increasing adhesion to the other surface of the first substrate 111. The plurality of impact relieving patterns 280 may have a curved second surface 280b to disperse impacts applied from the outside.

In another embodiment, the plurality of impact mitigation patterns 280 may have a vertical cross-sectional shape that is a combination of a rectangle and a semicircle, as shown in FIG. 5C. More specifically, the first surface 280a of the plurality of impact mitigation patterns 280 in contact with the other surface of the substrate may be flat, and the second surface 280b facing the first surface 280a may have a curved surface. Additionally, the plurality of impact mitigation patterns 280 may have side surfaces connecting the first surface 280a and the second surface 280b, unlike FIG. 5B. When the spacing between the pixels (P1, P2, P3) is small and the area of the non-emission area (NEA) is small, the plurality of impact mitigation patterns 280 are provided to disperse the impact while securing the minimum thickness to absorb the impact. It may have the same shape as Figure 5c.

The plurality of impact mitigation patterns 280 may be formed of an organic material. It may contain one or more types of acryl resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, and olefin. , but is not necessarily limited to this.

In one embodiment, the plurality of impact mitigation patterns 280 may include a material that absorbs light. When the display device is configured with a bottom emitting method, a plurality of impact mitigation patterns 280 are formed in the non-emission area (NEA) and may function like a black matrix.

In another embodiment, the plurality of impact mitigation patterns 280 may include scattering particles capable of scattering light. Scattering particles may be beads or silica balls.

Meanwhile, the plurality of impact relief patterns 280 may include voids 285 as shown in FIG. 6 . The plurality of impact relief patterns 280 may form voids 285 inside the plurality of impact relief patterns 280 through control of process temperature, time, and defoaming process during the manufacturing process. The plurality of impact relief patterns 280 facilitate the absorption of physical shock by forming voids 285 therein.

The display panel 110 according to an embodiment of the present invention may further include a second adhesive layer 290 and a polarizing film 295.

When the display device is made of a bottom emission type, the polarizing film 295 is attached to the other surface of the first substrate 111 by the second adhesive layer 290. The polarizing film 295 polarizes light incident from the outside and blocks external light reflected by the second electrode 250. Additionally, the polarizing film 295 is formed to cover the plurality of impact relieving patterns 280 to prevent the plurality of impact relieving patterns 280 from being damaged.

The display panel 110 according to an embodiment of the present invention is characterized by forming a plurality of impact mitigation patterns 280 on the other surface of the first substrate 111. The plurality of shock relief patterns 280 can minimize shock transmitted to the encapsulation film 270 formed on one surface of the first substrate 111 by absorbing and alleviating shock applied from the outside. Accordingly, deformation of the encapsulation film 270 can be minimized, and stress due to a difference in restoration speed between the first substrate 111 on which the light emitting device is formed and the encapsulation film 270 can be minimized.

Additionally, the display panel 110 according to an embodiment of the present invention forms a plurality of impact mitigation patterns 280 in the non-emission area (NEA) so that physical shock is concentrated in the non-emission area (NEA). Accordingly, the display panel 110 according to an embodiment of the present invention can alleviate the impact applied to the light emitting unit EA.

As a result, the display panel 110 according to an embodiment of the present invention minimizes the impact and stress applied to the light-emitting layer 240 and the second electrode 250 disposed in the light-emitting portion EA, thereby reducing the impact and stress on the light-emitting layer 240. And it is possible to prevent the second electrode 250 from being peeled off.

FIG. 7 is a cross-sectional view showing another embodiment of line II of FIG. 2.

Referring to FIG. 7, the first substrate 111 of the display panel 110 according to another embodiment of the present invention includes a plurality of transistors 210, a planarization film 220, a first electrode 230, and a light emitting layer ( 240), a second electrode 250, a bank 225, a spacer 227, a first adhesive layer 260, an encapsulation film 270, and a plurality of impact relieving patterns 280 are formed. A plurality of color filters CF1, CF2, and CF3, a second adhesive layer 290, and a polarizing film 250 may be further formed on the first substrate 111.

The display panel 110 according to another embodiment of the present invention is different from the display panel 110 according to one embodiment of the present invention in that it includes a spacer 227. Below, we will focus on explaining these differences.

In addition, the plurality of transistors 210, planarization film 220, first electrode 230, light emitting layer 240, second electrode 250, bank 225, and first adhesive layer 260 shown in FIG. ), the encapsulation film 270, a plurality of impact relieving patterns 280, a plurality of color filters (CF1, CF2, CF3), a second adhesive layer 290, and a polarizing film 250 are configured as shown in FIG. 3 Since it is substantially the same as the above, detailed description thereof will be omitted.

Spacers 227 are formed on banks 225. The spacer 227 is formed to directly contact the bank 225, and the light emitting layer 240 and the second electrode 250 are formed on the top.

The spacer 227 has an inverted trapezoidal shape where one surface in contact with the bank 225 has a smaller area than the other surface facing the one surface. The light emitting layer 240 and the second electrode 250 are deposited on the spacer 227. At this time, because the spacer 227 has an inverted trapezoidal shape, the light emitting layer 240 and the second electrode 250 are deposited in a broken form on the spacer 227 as shown in FIG. 7. That is, the light-emitting layer 240 and the second electrode 250 disposed in the non-emission area (NEA) have a disconnected form rather than being connected to the light-emitting layer 240 and the second electrode 250 disposed in the light-emitting area (EA). . Accordingly, even if an impact is applied to the light-emitting layer 240 and the second electrode 250 disposed in the non-emission portion (NEA), the impact is not transmitted to the light-emitting layer 240 and the second electrode 250 disposed in the light-emitting portion (EA). Spread can be prevented.

FIG. 8 is a cross-sectional view showing another embodiment of line II of FIG. 2.

Referring to FIG. 8, the first substrate 111 of the display panel 110 according to another embodiment of the present invention includes a plurality of transistors 210, a planarization film 220, a first electrode 230, and a light emitting layer. (240), a second electrode 250, a bank 225, a shock absorbing layer 265, a first adhesive layer 260, an encapsulation film 270, and a plurality of shock relieving patterns 280 are formed. A plurality of color filters CF1, CF2, and CF3, a second adhesive layer 290, and a polarizing film 250 may be further formed on the first substrate 111.

The display panel 110 according to another embodiment of the present invention is different from the display panel 110 according to an embodiment of the present invention in that it includes a shock absorption layer 265. Below, we will focus on explaining these differences.

In addition, the plurality of transistors 210, planarization film 220, first electrode 230, light emitting layer 240, second electrode 250, bank 225, and first adhesive layer 260 shown in FIG. 8 ), the encapsulation film 270, a plurality of impact relieving patterns 280, a plurality of color filters (CF1, CF2, CF3), a second adhesive layer 290, and a polarizing film 250 are configured as shown in FIG. 3 Since it is substantially the same as the above, detailed description thereof will be omitted.

The shock absorption layer 265 is disposed between the encapsulation film 270 and the light emitting device to absorb shock so that the shock is not transmitted to the encapsulation film 270.

When the display device is made of a bottom-emitting type, the shock absorption layer 265 does not need to be a transparent material, and various opaque materials capable of absorbing shock may be used.

In one embodiment, the shock absorbing layer 265 may include a material composed of covalent bonds and weak bonds. The shock absorbing layer 265 can absorb shock by breaking weak bonds when shock is applied. In another embodiment, the shock absorbing layer 265 may be a foam-type tape with voids formed therein. In another embodiment, the shock absorption layer 265 may be composed of hemispherical bumpers. At this time, the shock absorption layer 265 may be made of rubber.

Although embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications may be made without departing from the technical spirit of the present invention. . Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of protection of the present invention should be interpreted in accordance with the claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of the present invention.

110: display panel 111: first substrate
112: second substrate 210: transistor
220: planarization film 230: first electrode
240: light emitting layer 250: second electrode
225: bank 227: spacer
260: first adhesive layer 265: shock absorption layer
270: Encapsulation film 280: Impact mitigation pattern
290: second adhesive layer 295: polarizing film

Claims (18)

Board;
a plurality of light emitting devices disposed on one surface of the substrate;
an encapsulation film formed on the plurality of light emitting devices and including at least one metal film;
a shock absorbing layer formed between the encapsulation film and the plurality of light emitting devices; and
It includes a plurality of impact relief patterns disposed on the other side of the substrate facing the one side to relieve shock applied from the outside,
Each of the plurality of light emitting devices,
a plurality of first electrodes formed on the substrate;
a light emitting layer formed on the plurality of first electrodes; and
It includes a second electrode formed on the light emitting layer,
A bank is formed between the plurality of first electrodes to cover an end of each of the plurality of first electrodes,
The plurality of impact mitigation patterns overlap with the bank,
The plurality of impact relief patterns include a first surface in contact with the other surface of the substrate, and a second surface facing the first surface, wherein the width of the first surface is greater than the width of the second surface. According to paragraph 1,
The display device further includes a first adhesive layer formed between the encapsulation film and the plurality of light emitting elements. According to paragraph 1,
A display device wherein the at least one metal film is made of an opaque metal. According to paragraph 1,
a second adhesive layer covering the plurality of impact mitigation patterns; and
The display device further includes a polarizing film adhered to the substrate and the plurality of impact mitigation patterns by the second adhesive layer. delete According to paragraph 1,
A display device wherein the shock absorbing layer includes a material made of covalent bonds and weak bonds. delete According to paragraph 1,
A display device wherein the plurality of impact mitigation patterns include an organic material. delete According to paragraph 1,
A display device in which an air gap is formed inside the plurality of impact relief patterns. delete delete According to paragraph 1,
The display device wherein the plurality of first electrodes are transparent electrodes, and the second electrode is an opaque electrode. delete According to paragraph 1,
The display device further includes a spacer formed on the bank, wherein one surface contacting the bank has a smaller area than the other surface facing the one surface. According to clause 15,
A display device in which the light-emitting layer is a white light-emitting layer and is cut off on the spacer. According to clause 15,
A display device in which the second electrode breaks on the spacer. According to paragraph 4,
Further comprising a thin film transistor disposed between the substrate and the light-emitting device and connected to the light-emitting device,
A display device wherein the plurality of impact mitigation patterns are disposed between the thin film transistor and the polarizing film.

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