KR102393547B1 - Display Device - Google Patents

Abstract

A display device according to an embodiment of the present invention includes a display panel, a polarizing plate positioned on the display panel, a touch film positioned on the polarizing plate, and the polarizing plate and the polarizing plate without an air gap between the polarizing plate and the touch film. an adhesive layer for adhering the touch film, and a complementary member positioned between the display panel and the touch film to compensate for a side step between the display panel and the touch film, wherein the area of the polarizing plate is equal to that of the display panel and It is smaller than the area of the touch film, and the side step is a gap between the display panel and the touch film as the polarizing plate has a smaller area than the adhesive layer sandwiched between the display panel and the touch film. do.

Description

Display Device

The present invention relates to a display device, and more particularly, to a display device capable of preventing damage due to impact.

A video display device that implements various information on a screen is a key technology in the information and communication era, and is developing in the direction of thinner, lighter, more portable and high-performance. In recent years, with the development of the information society, as the demand for various types of display devices increases, LCD (Liquid Crystal Display), PDP (Plasma Display Panel), ELD (Electro Luminescent Display), FED (Field Emission Display), OLED ( Research on display devices such as Organic Light Emitting Diode) is being actively conducted.

Recently, various input devices such as a keyboard, a mouse, a trackball, a joystick, and a digitizer are used to form an interface between a user and a home appliance or various information and communication devices. However, in response to a demand for an input device that is convenient, simple, and capable of reducing malfunctions, a touch panel in which a user directly contacts a screen with a hand or a pen to input information has been proposed.

The touch panel is applied to various display devices because it is simple, has few malfunctions, allows input without using a separate input device, and allows the user to quickly and easily manipulate the contents displayed on the screen. there is.

A display device to which a touch panel is attached is mainly used in portable electronic devices such as a tablet or a smart phone. However, a display device such as a portable electronic device may be easily damaged if it falls during movement or is impacted by an external force. Accordingly, in order to prevent the display device from being damaged by a fall or impact, it is required to increase the durability of the display device.

The present invention provides a display device capable of preventing the display device from being damaged by a fall or impact.

In addition, the present invention provides a display device capable of improving the reliability of the display device by increasing the durability of the display device.

In order to achieve the above object, a display device according to an embodiment of the present invention includes a display panel, a polarizing plate positioned on the display panel, a touch film positioned on the polarizing plate, and an air gap between the polarizing plate and the touch film an adhesive layer for adhering the polarizing plate and the touch film without an air gap, and a complementary member positioned between the display panel and the touch film to compensate for a side step between the display panel and the touch film, wherein an area of the polarizing plate is smaller than an area of the display panel and the touch film, and the lateral step has a smaller area than that of the adhesive layer sandwiched between the display panel and the touch film. It is characterized in that it is a gap between the touch films.

The display panel may include a display area and a non-display area, and the complementary member is positioned in the non-display area of the display panel.

The complementary member may be positioned at at least one corner of the display panel.

The supplementary member includes a first supplementary part attached to the upper surface of the display panel and adjacent to the polarizing plate so that a side surface thereof is in contact, and a first supplementary part attached to the first supplementary part and positioned between the first supplementary part and the touch film. It is characterized in that it includes two complementary parts.

The first complementing part may extend from an upper surface of the display panel to a rear surface of the display panel.

The side step may include a first side step formed between the display panel and the adhesive layer and a second side step formed between the display panel and the touch film.

The first complementing part complements the first side step and the second side step.

The second supplementary part is adhered to the upper surface of the first supplementary part and the lower surface of the adhesive layer to completely compensate for the first side step.

The second complementing part compensates for the second side step, and is spaced apart from the touch film.

The display panel includes a TFT array substrate and a color filter array substrate, and the TFT array substrate includes a driver IC.

The first complementing part may be attached to the driving IC from a top surface of the display panel.

The second complementing portion may extend to the driving IC along the first supplementary portion.

The second complementing portion may extend to a side surface of the TFT array substrate.

The first supplementary part is a conductive tape, characterized in that it is an ITO or IZO tape.

The second complementing part is a non-conductive tape, characterized in that it is a polymer resin or a silicone resin.

In the display device according to the present invention, in the structure in which the display panel and the touch film are bonded by an adhesive layer, the second complementing part extends to the side surface of the TFT array substrate, thereby supplementing the side step formed between the display panel and the touch film to improve the quality of the display device. There is an advantage in that it is possible to prevent the TFT array substrate from being damaged when it is dropped.

1 is a plan view showing a display device;
Fig. 2 is a cross-sectional view taken along line X-X' of Fig. 1;
3 is a diagram illustrating a drop test of a display device;
4 is an image showing a damaged display device.
5 is a view showing a side step existing in a display device;
6 is a cross-sectional view showing a conventional display device.
7 is a cross-sectional view illustrating a display device.
8 is a perspective view illustrating a display device according to an embodiment of the present invention;
9 is a plan view illustrating a display device according to an embodiment of the present invention.
Fig. 10 is a cross-sectional view taken along line II' of Fig. 9;
11 is a plan view illustrating a display device according to an embodiment of the present invention;
12 is an image showing a drop test result of a display device according to a comparative example and an embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative and the present invention is not limited to the illustrated matters. Like reference numerals refer to like elements throughout. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. When 'including', 'having', 'consisting', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, cases including the plural are included unless otherwise explicitly stated.

In interpreting the components, it is construed as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'beside', etc., 'right' Alternatively, one or more other parts may be positioned between two parts unless 'directly' is used.

In the case of a description of a temporal relationship, for example, 'immediately' or 'directly' when a temporal relationship is described with 'after', 'following', 'after', 'before', etc. It may include cases that are not continuous unless this is used.

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

Each feature of the various embodiments of the present invention can be partially or wholly combined or combined with each other, technically various interlocking and driving are possible, and each of the embodiments may be independently implemented with respect to each other or implemented together in a related relationship. may be

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

In general, a touch panel may be divided into an add-on type, an on-cell type, and an in-cell type according to a structure. The top plate attachment type is a method of attaching the touch panel to the top plate of the display device after separately manufacturing the display device and the touch panel. The integrated top plate is a method of directly forming elements constituting the touch panel on the surface of the upper glass substrate of the display device. The panel built-in type is a method in which elements constituting the touch panel are directly formed inside the display device.

Among them, in the display device with a top plate attachment, a touch panel coated with an adhesive layer is attached to an upper portion of a display panel to which a polarizing plate is attached, thereby integrating the display panel and the touch panel. The touch panel may have a form in which a touch element is formed on a glass substrate or a touch element is formed on a film. Hereinafter, a touch film prepared in the form of a film will be described as an example. The top-mounted display device has the advantage of being thin compared to the conventional display panel and not having a touch film attached thereto, but there is a problem in that the display device is damaged during a fall or an external impact.

The present inventors performed various drop tests to determine the cause of damage to the display device, and found that the edge of the TFT array substrate of the display device was damaged a lot during the fall.

Hereinafter, with reference to the accompanying drawings of the display device, the cause of the damage of the display device will be described in more detail.

1 is a plan view illustrating a display device. FIG. 2 is a cross-sectional view taken along line X-X' of FIG. 1 . 3 is a diagram illustrating a drop test of a display device. 4 is an image illustrating a damaged display device. 5 is a view illustrating a side step existing in a display device. 6 is a cross-sectional view illustrating a conventional display device. 7 is a cross-sectional view illustrating a display device.

Referring to FIG. 1 , the display device 100 includes a display unit A/A for displaying an image and a non-display unit A/A excluding the display unit A/A. As shown in FIG. 2 , the cross-sectional structure of the non-display unit N/A includes a display panel DP in which a color filter array substrate 130 and a TFT array substrate 110 are bonded, and a TFT array substrate 110 . ), the driving IC 120 is mounted on the pad portion. And the ITO tape 125 extending from the upper surface of the color filter array substrate 130 to the rear surface of the TFT array substrate 110 is provided. The polarizing plate 140 is bonded to the upper surface of the display panel DP, and the touch film 160 bonded to the cover substrate 170 is bonded to the polarizing plate 140 of the display panel DP through the adhesive layer 150. is done The display panel and the touch film are modularized with a backlight unit, an optical film, a main board, etc. between the top cover and the bottom cover to complete the display device.

Referring to FIG. 3 , the present inventors performed drop tests (a) to (h) in which the display device is dropped to form various angles with the ground in order to determine the cause of damage to the display device. Although not all shown in the drawings, drop tests are performed with more angles and shapes. As a result of the drop test, as shown in FIG. 4 , both lower corners of the display device were damaged. Due to this breakage, a liquid crystal leakage phenomenon occurred in which liquid crystal leaked out of the display panel. Through the drop test, the present inventors found that the load distribution of the display device was non-uniform, and found that the damaged portion was the portion to which the load was intensively applied.

Referring to FIG. 5 , the damaged portion of the display device 100 is the TFT array substrate 110 , and it appears as a portion adjacent to a pad on which the driving IC 120 is mounted. A pad portion of the TFT array substrate 110 protrudes further than the color filter array substrate 130 in order to mount the driving IC 120 and to be connected to the PCB. Due to this, a first side step G1 is formed between the TFT array substrate 110 to which the ITO tape 125 is attached and the adhesive layer 150 located thereon, and the TFT array substrate 110 to which the ITO tape 125 is attached. ) and the second side step G2 is formed between the upper touch film 160 . Accordingly, when an impact, that is, a load, is transferred to the display panel DP when the display device is dropped, the load is applied to the pad portion of the TFT array substrate 110 in which the first and second side steps G1 and G2 exist. is focused When the load is concentrated on the pad portion of the TFT array substrate 110, the TFT array substrate 110 has the first and second side steps G2, a force opposing the load acts, but the TFT array substrate 110 is If it cannot withstand the power, it will be damaged.

On the other hand, as shown in FIG. 6 , in the conventional display device 100 , the cover substrate 170 to which the touch film 160 is attached and the display panel DP are not bonded to each other and are spaced apart from each other by a predetermined distance. In the conventional display device 100 , since an air gap exists between the cover substrate 170 and the display panel DP, specifically, the touch film 160 and the polarizing plate 140 , when the display device is dropped, the cover Even when an impact is applied to the substrate 170 , the impact only damages the cover substrate 170 or the touch film 160 and is not transmitted to the display panel DP. Accordingly, the display panel DP is not damaged due to an air gap formed between the cover substrate 170 and the display panel DP.

However, referring to FIG. 5 , when the cover substrate 170 to which the touch film 160 is attached and the display panel DP are bonded and integrated through the adhesive layer 150 , the cover substrate 170 when the display device is dropped. ), the impact is transmitted to the display panel DP through the adhesive layer 150 . Accordingly, damage frequently occurs in the display device having a structure in which the cover substrate 170 to which the touch film 160 is attached and the display panel DP are bonded through the adhesive layer 150 .

To solve this problem, referring to FIG. 7 , between the ITO tape 125 and the adhesive layer 150 attached to the upper surface of the display panel DP to which the polarizing plate 140 is attached, that is, to the upper surface of the color filter array substrate 130 . A shim tape (127) was attached thereto. The seam tape 127 is made of a cushioning polymer to cushion the load transferred between the cover substrate 170 and the display panel DP. However, in the seam tape 127 attached between the ITO tape 125 and the adhesive layer 150 , since the section in which the seam tape 127 exists is narrow, all of the seam tapes present between the cover substrate 170 and the display panel DP It was impossible to cover the side steps. Furthermore, as the cover substrate 170 sags in the region where the side step exists, cracks occur in the cover substrate 170 and light leakage failure occurs.

Accordingly, the present inventors provided a complementary member between the display panel and the cover substrate to prevent the pad portion of the TFT array substrate of the display panel from being damaged when the display device is dropped.

Hereinafter, a display device according to an exemplary embodiment of the present invention will be described with reference to FIGS. 8 to 11 .

8 is a perspective view illustrating a display device according to an embodiment of the present invention. 9 is a plan view illustrating a display device according to an embodiment of the present invention. 10 is a cross-sectional view taken along line I-I' of FIG. 9 . 11 is a plan view illustrating a display device according to an embodiment of the present invention.

Referring to FIG. 8 , the display device 200 according to an embodiment of the present invention includes a touch film 240 , a display panel DP, a backlight unit EBLU, a guide panel GP, a bottom cover BC, and a top It is configured to include a cover (TC).

The display panel DP is mounted on the panel support of the guide panel GP to control transmittance of light supplied from the backlight unit EBLU to realize an image. The display panel DP includes a TFT array substrate 210 and a color filter array substrate 215 that are laminated to face each other with a liquid crystal layer (not shown) interposed therebetween. Although not shown in the drawings, a plurality of scan lines and data lines cross in a matrix shape to define a plurality of pixels in the TFT array substrate 210 . Each pixel may be provided with a thin film transistor (TFT) capable of turning on/off a signal, and pixel electrodes connected to the thin film transistor may be positioned. The color filter array substrate 215 includes red (R), green (G), and blue (B) color filters respectively corresponding to a plurality of pixels, and non-display devices such as scan lines, data lines, and thin film transistors respectively surrounding them. A black matrix may be provided to cover . In addition, a transparent common electrode covering them may be provided. In the present embodiment, a pixel electrode is provided on the TFT array substrate 210 and a common electrode is provided on the color filter array substrate 215 as an example, but it is not limited thereto and the TFT array substrate 210 has a pixel electrode and a common electrode. All electrodes may be provided.

In the display panel DP having the above structure, when the thin film transistor selected for each scan line is turned on by the on/off signal of the gate driving circuit transmitted from the scan line, the data voltage of the data driving circuit is transmitted through the data line. It is transmitted to the corresponding pixel electrode, and accordingly, the arrangement direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode to indicate a difference in transmittance.

The guide panel GP wraps the edges of the light guide plate LG, the optical film OPT, and the reflection plate REF, and the light guide plate LG, the optical film OPT and the reflection plate REF are attached to the bottom cover BC. It serves to fix and support the display panel DP. Here, the role of the guide panel GP may be replaced or omitted by a structure added to the top cover TC and the bottom cover BC.

Meanwhile, the display device 200 of the present invention may include a backlight unit EBLU capable of providing light from the rear surface of the display panel DP to the display panel DP. The backlight unit EBLU includes a light source LS, a white or silver reflecting plate REF, a light guide plate LG positioned on the reflecting plate REF, and a plurality of optical films OPT interposed on the light guide plate LG. may include

The light source LS is mounted on the light source circuit board, is driven by a power source, and generates light. The light source LS may be formed of any one of a light emitting diode (LED), a cold cathode fluorescent lamp (CCFL), and an external electrode fluorescent lamp (EEFL). Light emitted from the light source LS is incident into the light guide plate GP, and is supplied to the display panel DP by the light guide plate GP, the optical film OPT, and the reflection plate REF. The light source LS is formed to face at least one surface of the light guide plate LG.

The optical film OPT condenses or diffuses light emitted through the light guide plate LG to be transmitted to the display panel DP. To this end, the optical film OPT is configured to include at least one diffusion sheet or a light collecting sheet. The diffusion sheet serves to prevent the light emitted through the light guide plate LG from being concentrated in a partial area and to disperse the light so that it is transmitted to the display panel DP in an even distribution. The light collecting sheet collects light emitted from the light guide plate LG and vertically transmits the light to the display panel DP.

The reflecting plate REF is disposed on the lower or side surface of the light guide plate LG, and reflects the light emitted from the exit surface or the lower side of the light guide plate LG into the inside of the light guide plate LG. The reflective plate REF may have a different formation position depending on the arrangement of the light source LS. For example, in the case of a direct backlight unit, it may be disposed below the light guide plate LG, that is, on a surface facing the display panel DP with the light guide plate LG interposed therebetween. In addition, the edge type backlight unit may be configured on the side surface of the light guide plate LG or may be omitted if necessary, and it is not limited only to the above description and may be modified by various factors such as the arrangement of the light source LS.

The light guide plate LG spreads the light incident from the light source LS to a wide area of the light guide plate LG as it travels within the light guide plate LG by total reflection several times and provides a primary surface light source to the display panel DP. can do. The light guide plate LG may include a pattern having a specific shape on the rear surface to supply a uniform surface light source.

Meanwhile, the touch film 240 is positioned on the display panel DP. The touch film 240 is provided with a touch driving electrode and a touch sensing electrode for driving a touch element, and has a structure in which a touch driving electrode is disposed on one side of a film and a touch sensing electrode is disposed on the other side of one sheet of film, or two films Each of the touch driving electrode and the touch sensing electrode may be separately arranged and formed in a bonded structure. The touch driving electrode and the touch sensing electrode are disposed to cross each other, and the position is determined by detecting a change in capacitance between the touch driving electrode and the touch sensing electrode according to a user's touch. Then, the cover substrate 250 is positioned on the touch film 240 to protect the elements inside the display device.

The touch film 240 , the display panel DP, and the backlight unit EBLU may be modularized through the top cover TC, the guide panel GP, and the bottom cover BC. The top cover TC has a rectangular frame shape that covers the top and side surfaces of the display panel DP, and an image implemented on the display panel DP can be displayed by opening the front surface of the top cover TC. The bottom cover BC serves as a basis for the display device by combining the display panel DP and the backlight unit EBLU, and may be formed in a single plate shape of a square shape.

In more detail, a plan view of a display device according to an embodiment of the present invention and a cross-sectional view thereof will be described.

Referring to FIG. 9 , the display device 200 according to the present invention includes a display area A/A for displaying an image and a non-display area N/A other than the display area A/A. In the non-display area N/A, a pad including a driving IC D-IC is positioned. Referring to FIG. 10 , which is a cross-sectional view taken along line II′ of FIG. 9 , a display panel DP in which a color filter array substrate 215 and a TFT array substrate 210 are bonded is provided. A driving IC (D-IC) is mounted on a pad of the TFT array substrate 210 .

The upper polarizing plate 220 is provided on the upper surface of the display panel DP, that is, the upper surface of the color filter array substrate 215 , and the lower polarizing plate 225 is provided on the lower surface of the display panel DP, that is, the lower surface of the TFT array substrate 210 . ) is provided. The upper polarizing plate 220 has a light transmission axis or a light blocking axis aligned in the first direction. The lower polarizing plate 225 has a light transmission axis or a light blocking axis aligned in the second direction. When the display device 200 is normally black, the first light transmission axis and the second light transmission axis are preferably disposed to be perpendicular to each other. On the other hand, in the case of normally white, the first light transmission axis and the second light transmission axis may be parallel to each other.

The touch film 240 is adhered to the display panel DP by an adhesive layer 230 on the display panel DP. Specifically, the upper polarizing plate 220 and the touch film 240 positioned on the upper surface of the display panel DP are adhered to each other by the adhesive layer 230 . The adhesive layer 230 adheres the upper polarizing plate 220 and the touch film 240 to each other without an air gap. The adhesive layer 230 is made of a transparent adhesive resin such as optical clear adhesive (OCA) or optical clear resin (OCR), and transmits light emitted from the display panel DP. A cover substrate 250 is positioned on the touch film 240 . The cover substrate 250 protects the lower touch film 240 or the display panel DP from the outside, and is made of a material having excellent durability, such as tempered glass or tempered plastic. In addition, the cover substrate 250 is made of a transparent material to transmit light emitted from the lower display panel DP.

A backlight unit EBLU including a reflection plate REF, a light guide plate LG, and an optical film OPT is disposed under the display panel DP, and a guide panel GP is disposed on a side surface of the backlight unit EBLU. do. A description thereof will be omitted since it has been described above.

Meanwhile, in the present invention, in order to prevent the pad portion of the TFT array substrate of the display panel from being damaged when the display device is dropped, a complementary member is provided between the display panel and the cover substrate.

In more detail, the display device 200 of the present invention includes a complementary member 290 positioned between the display panel DP and the touch film 240 . The supplementary member 290 supplements the side step SS between the display panel DP and the touch film 240 . The side step SS between the display panel DP and the touch film 240 is due to the fact that the polarizing plate 220 has a smaller area than the adhesive layer 230 sandwiched between the display panel DP and the touch film 240 . Accordingly, it refers to a gap occurring between the display panel DP and the touch film 240 .

The supplementary member 290 includes a first supplementary part 292 and a second supplementary part 295 . The first supplementary part 292 is attached to the upper surface of the display panel DP and is adjacent to the upper polarizing plate 220 so that the side thereof is in contact. The first supplementary part 292 is adhered to the top surface of the driving IC D-IC from the top surface of the display panel DP and extends to the outside of the display panel DP. Accordingly, the first supplementary part 292 includes a first side step SS1 formed between the display panel DP and the adhesive layer 230 and a second side step SS1 formed between the display panel DP and the touch film 240 . The side step difference (SS2) is compensated.

The first supplementary part 292 is a conductive tape, and is formed by laminating a transparent conductive oxide such as indium tin oxide (ITO), indium zinc oxide (IZO), or indium tin zinc oxide (ITZO) on a flexible plastic film. . The first supplementary part 292 is attached to the upper surface of the display panel DP, and is attached to a portion of the upper surface of the display panel DP to which the upper polarizing plate 220 is not attached. As described above, since the area of the upper polarizer 220 is smaller than that of the display panel DP, a portion to which the upper polarizer 220 is not attached is present on the upper surface of the display panel DP. Accordingly, the first supplementary part 292 is attached to the upper surface of the display panel DP, that is, the color filter array substrate 215 , and discharges static electricity generated on the upper surface of the display panel DP to the outside. To this end, the first supplementary part 292 is connected to the back surface of the display panel DP, that is, extended to the outside, and connected to a metal structure connected to the ground wire of the system, such as the bottom cover (BC of FIG. 8 ). Although the first supplementary part 292 is illustrated as being connected to the reflector REF in FIG. 10 , it may be connected anywhere as long as it is a grounded metal structure of the display panel DP as long as it does not interfere with driving.

The second supplementary part 295 is attached to the upper surface of the first supplementary part 292 to compensate for the side step SS between the display panel DP and the touch film 240 . In more detail, the second supplementary part 295 compensates for the first side step SS1 between the first supplementary part 292 and the adhesive layer 230 . That is, the lower surface of the second supplementary part 295 is attached to the first supplementary part 292 and the upper surface of the second supplementary part 295 is attached to the adhesive layer 230, so that the first supplementary part 292 and the adhesive layer ( 230) completely compensates for the first side step SS1 formed between them. In addition, the second supplementary part 295 extends in width to compensate for the second side step SS2 between the first supplementary part 292 and the touch film 240 . That is, the lower surface of the second supplementary part 295 is attached to the first supplementary part 292 , and a part of the upper surface of the second supplementary part 295 is attached to the adhesive layer 230 , and The remaining portion of the upper surface further protrudes toward the side of the adhesive layer 230 while being exposed. In other words, the remaining portion of the upper surface of the second supplementary part 295 is spaced apart from the touch film 240 without the adhesive layer 230 interposed therebetween. That is, a portion of the upper surface of the second supplementary part 295 is disposed adjacent to but spaced apart from the touch film 240 . Accordingly, the second supplementary part 295 may further supplement the second side step SS2 formed between the first supplementary part 292 and the touch film 240 by the thickness of the second supplementary part 295 .

Meanwhile, one end of the second supplementary part 295 is disposed adjacent to and in contact with the side surface of the upper polarizing plate 220 , and the other end of the second supplementary part 295 extends to the side surface of the TFT array substrate 210 . In more detail, the other end of the second complementing part 295 is disposed adjacent to the end of the driving IC (D-IC). That is, the second supplementary part 295 extends from the upper polarizing plate 220 to the driving IC (D-IC) along the upper surface of the first supplementary part 292 , and is disposed adjacent to the end of the driving IC (D-IC). do. Accordingly, the other end of the second complementing part 295 protrudes more than the end of the touch film 240 , so that the first side step SS1 formed between the first supplementary part 292 and the adhesive layer 230 and the first The second side step SS2 formed between the supplementary part 292 and the touch film 240 may be supplemented. The other end of the second complementing part 295 may be disposed inward or more protruding outward than the end of the driving IC D-IC according to a process margin. However, if the other end of the second supplementary part 295 protrudes from the end of the driving IC (D-IC), the first supplementary part 292 may be lifted at the bent portion, so that the other side of the second supplementary part 295 is raised. It is preferable that the end coincides with the end of the driving IC (D-IC). The second complementing part 295 may be made of a polymer resin or a silicone resin capable of buffering with a non-conductive tape.

In the display device of the present invention, when the touch film 240 is bonded to the display panel DP through the adhesive layer 230 , the step difference between the side surfaces of the display panel DP and the touch film 240 becomes very small. For example, the side step SS between the display panel DP and the touch film 240 is only 0.15 mm. Therefore, the side step (SS) is very small, so it is very difficult to insert or add a separate component. In the present invention, a side step between the display panel DP and the touch film 240 can be covered by using a component positioned between the display panel DP and the touch film 240 . Accordingly, according to the present invention, a side step difference between the display panel DP and the touch film 240 is compensated for by using the above-described first supplementary part 292 and the second supplementary part 295 . In particular, a side step difference between the display panel DP and the touch film 240 is compensated for by extending the width of the second complementing part 295 .

Meanwhile, referring to FIG. 11 , the supplementary member 290 including the first supplementary part and the second supplementary part of the present invention is provided in the non-display area N/A of the display panel DP. That is, it is positioned in the non-display area N/A of the display panel DP where the upper polarizer is not positioned. In more detail, the complementary member 290 is disposed at each of the four corners of the display panel DP, but is formed discontinuously. Since the first supplementary part 292 has a structure that surrounds the display panel DP from the upper surface to the rear surface of the display panel DP, it is difficult to form at the corner of the display panel DP. Accordingly, since the second supplementary part 295 is adhered to the upper surface of the first supplementary part 292 , the second supplementary part 295 is also not formed in the corner portion of the display panel DP. Although FIG. 11 illustrates that the complementary member 290 is positioned at all four corners of the display panel DP, the present invention is not limited thereto, and may be positioned at at least one corner adjacent to the pad part.

As described above, the present invention is to prevent the portion adjacent to the pad of the TFT array substrate 210 from being damaged when the display device is dropped, and is present between the display panel DP and the touch film 240 . and a complementary member 290 to supplement the side step SS. The supplementary member 290 includes a first supplementary part 292 and a second supplementary part 295 adhered on the first supplementary part 292 , and the second supplementary part 295 is attached to the TFT array substrate 210 . It was formed by extending to the side of the Accordingly, the second complementing part 295 compensates for the first side step SS1 between the display panel DP and the adhesive layer 230 and the second side surface between the display panel DP and the touch film 240 . The step difference (SS2) can be supplemented. Accordingly, even when the load is concentrated on the pad portion of the TFT array substrate 210 when the display device 200 is dropped, the side steps SS1 and SS2 are compensated by the supplementary member 290 to compensate the TFT array substrate ( 210) can be prevented from being damaged.

12 is an image showing a drop test result of a display device according to a comparative example and an embodiment of the present invention. Here, the display device according to the comparative example is the display device shown in FIG. 5 , and there is no air gap because an adhesive layer is positioned between the display panel and the touch film, and the seam tape is present from the polarizing plate to the side surface of the color filter array substrate. The display device according to the embodiment has a structure in which an adhesive layer is positioned between the display panel and the touch film shown in FIG. 10 , so that there is no air gap, and the seam tape, which is a second complementary member, exists up to the side surface of the TFT array substrate.

Referring to FIG. 12 , the display device according to the comparative example was subjected to a total of 10 drop tests performed to form various angles and shapes on the ground. In the drop tests #3 to #8, the display device was damaged. . On the other hand, the display device according to the embodiment was not damaged in a total of 10 drop tests.

From this result, it was confirmed that, according to an embodiment of the present invention, damage to the TFT array substrate can be prevented when the display device is dropped by extending the seam tape located between the display panel and the touch film to the side of the TFT array substrate. did

As described above, in the display device according to the present invention, in the structure in which the display panel and the touch film are bonded by an adhesive layer, the second complementing part is extended to the side surface of the TFT array substrate, thereby supplementing the side step difference between the display panel and the touch film. There is an advantage in that the TFT array substrate can be prevented from being damaged when the display device is dropped.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical configuration of the present invention can be changed to other specific forms by those skilled in the art to which the present invention pertains without changing the technical spirit or essential features of the present invention. It will be appreciated that this may be practiced. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. In addition, the scope of the present invention is indicated by the claims to be described later rather than the above detailed description. In addition, all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

200: display device 210: TFT array substrate
215: color filter array substrate 220: upper polarizing plate
225: lower polarizing plate 230: adhesive layer
240: touch film 250: cover substrate
290: supplementary member 292: first supplementary part
295: second complement

Claims (15)

display panel;
a polarizing plate positioned on the display panel;
a touch film positioned on the polarizing plate;
an adhesive layer for adhering the polarizing plate and the touch film without an air gap between the polarizing plate and the touch film; and
a complementary member positioned between the display panel and the touch film to compensate for a side step between the display panel and the touch film; and
An area of the polarizing plate is smaller than an area of the display panel and the touch film,
The side step is a gap between the display panel and the touch film as the polarizing plate has a smaller area than the adhesive layer sandwiched between the display panel and the touch film,
The supplementary member may include: a first supplementary part attached to an upper surface of the display panel and adjacent to the polarizing plate and a side surface thereof; and a second supplementary part attached to the first supplementary part and positioned between the first supplementary part and the touch film. According to claim 1,
The display panel includes a display area and a non-display area,
and the complementary member is positioned in a non-display area of the display panel. 3. The method of claim 2,
The display device according to claim 1, wherein the complementary member is positioned at at least one corner of the display panel. delete According to claim 1,
The display device of claim 1, wherein the first complementing part extends from an upper surface of the display panel to a rear surface of the display panel. According to claim 1,
The display device according to claim 1 , wherein the side step includes a first side step formed between the display panel and the adhesive layer and a second side step formed between the display panel and the touch film. 7. The method of claim 6,
and the first complementing part supplements the first side step and the second side step. 7. The method of claim 6,
and the second supplementary part is adhered to the upper surface of the first supplementary part and the lower surface of the adhesive layer to completely compensate for the step difference in the first side. 9. The method of claim 8,
The second complementing part compensates for the second side step, and is spaced apart from the touch film. 3. The method of claim 2,
The display panel includes a TFT array substrate and a color filter array substrate, and the TFT array substrate includes a driver IC. 11. The method of claim 10,
The display device of claim 1, wherein the first complementing part is attached to the driving IC from an upper surface of the display panel. 12. The method of claim 11,
The display device of claim 1, wherein the second complementing part extends to the driving IC along the first supplementary part. 11. The method of claim 10,
and the second complementing part extends to a side surface of the TFT array substrate. According to claim 1,
The first supplementary part is a conductive tape, and the display device is characterized in that it is an ITO or IZO tape. According to claim 1,
The second complementing part is a non-conductive tape, and the display device is characterized in that it is a polymer resin or a silicone resin.

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