Display device and manufacturing method thereof

Abstract

Disclosed is a display device including: a display panel having an active area and a non-active area; a cover member disposed on the display panel; a touch sensor layer disposed between the display panel and the cover member; and a transparent adhesive member disposed between the display panel and the touch sensor layer, in which the transparent adhesive member includes a plastic film having a plurality of recessed portions disposed at a rear surface of a corner portion thereof, an upper transparent adhesive member, and a lower transparent adhesive member, the upper transparent adhesive member is disposed on an upper surface of the plastic film, and the lower transparent adhesive member is disposed on a lower surface of the plastic film.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of Korean Patent Application No. P2024-0133127, filed on September 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to a display device, and more specifically, to a display device and a method of manufacturing the same capable of eliminating defects occurring during the bonding process of the display device. Background Technology

[0004] Image display devices that provide various information on a screen are a core technology of the information and communication age, and are evolving towards thinner, lighter, more portable, and higher-performance designs. Therefore, display devices that can be manufactured in a lightweight and thin form are attracting considerable attention.

[0005] Specific examples of display devices include liquid crystal displays (LCDs), quantum dot displays (QDs), field emission displays (FEDs), and organic light-emitting diode displays (OLEDs).

[0006] Organic light-emitting display devices are self-emissive display devices that are advantageous in terms of power consumption due to their low-voltage operation, and also have excellent color performance, response time, viewing angle and contrast ratio (CR), and are being researched as display devices.

[0007] Typically, organic light-emitting display devices have a structure in which a backplate, an organic light-emitting display panel, a polarizer, a touch sensor, and a cover member are stacked together, and each component is joined by an adhesive member. For example, the polarizer and the touch sensor are joined together by an adhesive member disposed therebetween.

[0008] However, as the shapes of display panels and touch sensors become more diverse, the contact surfaces of the touch sensors and adhesive components may be bent, and air bubbles may appear between the touch sensors and adhesive components in the corner areas of the display device.

[0009] In addition, the bonded components will protrude outwards due to the force applied during the bonding process. Summary of the Invention

[0010] Therefore, this disclosure relates to a display device and a method of manufacturing the same, which substantially eliminates one or more problems caused by the limitations and disadvantages of related technologies.

[0011] The purpose of this disclosure is to provide a display device and a method for manufacturing the same, which can eliminate defects that occur during the bonding process.

[0012] The purposes of this disclosure, designed to address the problem, are not limited to those described above, and other unmentioned purposes will be clearly understood by those skilled in the art based on the following detailed description of this disclosure.

[0013] A display device according to an embodiment of the present disclosure includes: a display panel having an active region and an active region; a cover member disposed on the display panel; a touch sensor layer disposed between the display panel and the cover member; and a transparent adhesive member disposed between the display panel and the touch sensor layer, wherein the transparent adhesive member includes: a plastic film having a plurality of recesses disposed on the rear surface of its corner portion; an upper transparent adhesive member disposed on the upper surface of the plastic film; and a lower transparent adhesive member disposed on the lower surface of the plastic film.

[0014] A method for manufacturing a display device according to an embodiment of the present disclosure includes: preparing a transparent adhesive member comprising a plastic film, an upper transparent adhesive member, and a lower transparent adhesive member, the plastic film having a plurality of recessed portions disposed on the rear surface of its corner portions, the upper transparent adhesive member disposed on the upper surface of the plastic film, the upper transparent adhesive member having a plurality of channels disposed on the upper surface of its corner portions, the plurality of channels being configured to allow air bubbles to be discharged to the outside through the plurality of channels, and the lower transparent adhesive member disposed on the lower surface of the plastic film; preparing a cover member and a touch sensor layer disposed below the cover member; bonding the upper transparent adhesive member of the transparent adhesive member to the lower surface of the touch sensor layer; and bonding a display panel having active and non-active regions to the lower transparent adhesive member of the transparent adhesive member.

[0015] Specific details of other implementation methods are included in the detailed embodiments and accompanying drawings. Attached Figure Description

[0016] The accompanying drawings, included to provide a further understanding of this disclosure and incorporated herein by reference and forming part of this application, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure. In the drawings:

[0017] Figure 1 This is a block diagram illustrating a display device according to an embodiment of the present disclosure;

[0018] Figure 2 This is a circuit diagram showing the pixel circuitry in a display device according to an embodiment of the present disclosure;

[0019] Figure 3 This is a cross-sectional view showing a display device according to an embodiment of the present disclosure;

[0020] Figure 4This is a cross-sectional view of a transparent adhesive member according to an embodiment of the present disclosure;

[0021] Figure 5 This is a plan view of the upper transparent adhesive member according to an embodiment of the present disclosure;

[0022] Figure 6 This is a rear view of the plastic film of a transparent adhesive member according to an embodiment of the present disclosure; and

[0023] Figures 7A to 7D This is a cross-sectional view showing a method for manufacturing a display device according to an embodiment of the present disclosure. Detailed Implementation

[0024] In the following description, preferred embodiments of the present disclosure will be described with reference to the accompanying drawings. Throughout the specification, the same reference numerals denote substantially the same parts.

[0025] In the following description, detailed descriptions of known technologies and configurations incorporated herein will be omitted where such descriptions may obscure the subject matter of this disclosure. Furthermore, the names of components used in the following description are chosen for ease of preparation of instructions and may differ from the names of components in the actual product.

[0026] In the accompanying drawings, which are used to explain various embodiments of this disclosure, shapes, dimensions, ratios, angles, and quantities are shown by way of example and therefore do not limit the scope of this disclosure. Throughout the specification, the same reference numerals denote the same parts.

[0027] Furthermore, in describing the specification, detailed descriptions of known technologies will be omitted where such descriptions may obscure the subject matter of this disclosure.

[0028] The terms “comprising,” “including,” and / or “having” as used in this specification do not exclude the presence or addition of other elements unless used with the term “only.” Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well.

[0029] In the interpretation of components included in the various embodiments of this disclosure, even if not explicitly described, components are interpreted as including a range of error.

[0030] In describing positional relationships in various embodiments of this disclosure, for example, when using terms such as “on,” “above,” “below,” “next to,” etc., to describe the positional relationship between two parts, one or more other parts may be located between the two parts, unless the terms “direct” or “close” are used with them.

[0031] When describing the temporal relationships in various embodiments of this disclosure, for example, when using terms such as "after," "following," "next," "before," etc., to describe the temporal relationship between two actions, the actions may not occur consecutively unless the terms "immediately" or "directly" are used with them.

[0032] In describing various embodiments of this disclosure, although terms such as "first" and "second" may be used to describe various components, these terms are only used to distinguish identical or similar components from one another. Therefore, in the specification, unless otherwise stated, within the technical scope of this disclosure, a component modified by "first" may be the same as a component modified by "second".

[0033] The corresponding features of the various embodiments of this disclosure can be linked and combined with each other in whole or in part, and various technical connections and operating methods between them are possible. The various embodiments can be performed independently of each other or can be performed in conjunction with each other.

[0034] In the following description, a display device according to an embodiment of the present disclosure will be described with reference to the accompanying drawings.

[0035] Figure 1 This is a schematic cross-sectional view of a display device according to an embodiment of the present disclosure.

[0036] Figure 2 This is a circuit diagram of the sub-pixels included in a display device according to an embodiment of the present disclosure.

[0037] like Figure 1 As shown, the display device according to an embodiment of this disclosure includes: a display panel 100 including a plurality of pixels P; a controller 200; a gate driving circuit 300 configured to supply a gate signal to each of the plurality of pixels P; a data driving circuit 400 configured to supply a data signal to each of the plurality of pixels P; a power supply unit 500 configured to supply power for operation to each of the plurality of pixels P; a level shifter 600 configured to adjust the potential of the gate signal applied to the gate driving circuit 300; and a sensing unit (not shown) configured to sense degradation of the plurality of pixels P. Here, the controller 200, the gate driving circuit 300, the data driving circuit 400, and the sensing unit can be collectively referred to as a control unit.

[0038] The display panel 100 may include an active region AA in which pixels P are located, and an active region NA in which gate driving circuitry 300 and data driving circuitry 400 are disposed, the active region being configured to surround the active region AA. The gate driving circuitry 300 may be disposed in the active region AA.

[0039] In the display panel 100, multiple gate lines SCL and EML intersect with multiple data lines DL. Each of the multiple pixels P is connected to a corresponding gate line SCL and EML and a corresponding data line DL. Specifically, a pixel P receives a gate signal from the gate driving circuit 300 via the gate lines SCL and EML, receives a data signal from the data driving circuit 400 via the data lines DL, and receives a high-level driving voltage EVDD and a low-level driving voltage EVSS from the power supply unit 500 via the driving voltage line PL.

[0040] Here, gate lines SCL and EML supply the scan signal SC and the light emission control signal EM, and data line DL supplies the data voltage Vdata. Furthermore, according to various embodiments, gate lines SCL and EML may include multiple scan lines SCL configured to provide the scan signal SC and multiple light emission control lines EML configured to provide the light emission control signal EM. Additionally, each of the plurality of pixels P may also include a power supply line VL to receive a reference voltage Vref and an initialization voltage Vini.

[0041] Each thin-film transistor (TFT) constituting pixel P can be implemented as an oxide TFT including an oxide semiconductor layer. Oxide TFTs may be advantageous for large-area display panels 100, taking into account electron mobility, process variations, etc. This disclosure is not limited thereto, and the semiconductor layer of the TFT can be made of amorphous silicon or polycrystalline silicon.

[0042] Additionally, each pixel P includes a light-emitting diode (LED) and pixel circuitry configured to control the operation of the LED. Here, the LED may include an anode, a cathode, and a light-emitting layer disposed between the anode and cathode.

[0043] like Figure 2 As shown, each pixel P may include a switching transistor ST, a driving transistor DT, a compensation circuit CC, a light-emitting diode, and a storage capacitor Cst.

[0044] A light-emitting diode can operate to emit light based on the drive current generated by the driving transistor DT.

[0045] The switching transistor ST can be switched in response to the scan signal SC provided through the scan line SCL, so that the data signal DATA provided through the data line DL is stored as a data voltage in the storage capacitor Cst. The storage capacitor Cst can maintain the data voltage for one frame.

[0046] The driving transistor DT can operate in response to the data voltage stored in the storage capacitor Cst, causing a constant driving current to flow between the high-potential power line EVDD and the low-potential power line EVSS.

[0047] The compensation circuit CC is a circuit configured to compensate the threshold voltage of the drive transistor DT, and the compensation circuit CC may include one or more thin-film transistors and capacitors. The configuration of the compensation circuit CC can vary greatly depending on the compensation method.

[0048] For example, Figure 2 The pixel P shown has a 2T (transistor) 1C (capacitor) structure including a switching transistor ST, a driving transistor DT, a storage capacitor Cst, and a light-emitting diode OLED. However, if a compensation circuit CC is added, the pixel can have various structures, such as 3T1C, 4T2C, 5T2C, 6T1C, 6T2C, 7T1C, 7T2C, and 8T1C structures.

[0049] The display panel 100 can be implemented as a non-transmissive display panel or a transmissive display panel. A transmissive display panel can be applied to a transparent display device, in which an image is displayed on the screen and a real object in the background is visible. The display panel 100 can be manufactured as a flexible display panel. A flexible display panel can be implemented as an organic light-emitting display panel using a plastic substrate.

[0050] Each pixel P can be divided into red, green, and blue pixels to achieve color. Each pixel P may also include white pixels. Each pixel P includes pixel circuitry.

[0051] A touch sensor may be disposed on the display panel 100. Touch input may be sensed using a separate touch sensor or through a pixel P. The touch sensor may be implemented as an on-cell or add-on type touch sensor disposed on the display panel, or as an in-cell type touch sensor embedded in the display panel 100.

[0052] The controller 200 processes externally input image data (RGB) to correspond to the size and resolution of the display panel 100 and provides it to the data driving circuit 400. The controller 200 uses externally input timing signals CS (such as a dot clock signal CLK, a data enable signal DE, a horizontal synchronization signal Hsync, and a vertical synchronization signal Vsync) to generate a gate control signal GCS and a data control signal DCS. The generated gate control signal GCS and data control signal DCS are provided to the gate driving circuit 300 and the data driving circuit 400, respectively, to control the gate driving circuit 300 and the data driving circuit 400.

[0053] The controller 200 can be coupled to various processors, such as microprocessors, mobile processors, and application processors, depending on the device in which the controller is installed.

[0054] The host system can be any of the following: a television (TV) system, a set-top box, a navigation system, a personal computer (PC), a home theater system, a mobile device, a wearable device, and a vehicle system.

[0055] The controller 200 can control the operation timing of the display panel driving unit using a frame frequency obtained by multiplying the input frame frequency by i times (where i is a positive integer greater than 0) by i Hz. The input frame frequency is 60 Hz in the National Television Standards Committee (NTSC) method and 50 Hz in the Phase Inverting Line (PAL) method.

[0056] The controller 200 generates signals to enable the pixel P to be driven at various refresh rates. That is, the controller 200 generates driving-related signals that allow the pixel P to be driven in a variable refresh rate (VRR) mode or to switch between a first refresh rate and a second refresh rate. For example, the controller 200 can drive the pixel P at various refresh rates by simply changing the speed of the clock signal, generating a synchronization signal to create horizontal or vertical blanking, or driving the gate drive circuit 300 in a masked manner.

[0057] Based on the timing signal CS received from the host system, the controller 200 generates a gate control signal GCS for controlling the operating timing of the gate drive circuit 300 and a data control signal DSC for controlling the operating timing of the data drive circuit 400. The controller 200 controls the operating timing of the display panel drive unit to synchronize the gate drive circuit 300 and the data drive circuit 400.

[0058] The data driving circuit 400 receives image data DATA and a data control signal DCS from the controller 200. In response to the data control signal DCS from the controller 200, the data driving circuit 400 converts the image data DATA into a gamma-compensated voltage to generate a data voltage Vdata, and synchronously provides the data voltage Vdata to the data line DL of the display panel 100 with the scan signal SC. The data driving circuit 400 can be connected to the data line of the display panel 100 via chip-on-glass (COG) or tape-automated bonding (TAB) processes.

[0059] The gate drive circuit 300 operates according to the gate control signal GCS input from the level shifter 600 to generate a gate signal, and sequentially supplies the gate signal to the gate line GL. The gate drive circuit 300 can be directly formed on the lower substrate of the display panel 100 using a gate driver in panel (GIP) method. The gate drive circuit 300 can be formed in the active region AA of the display panel 100, or it can be formed in the passive region NA outside the active region AA. The passive region NA can include a bezel region, or it can be the same as the bezel region. In the GIP method, the level shifter 600 can be mounted on a printed circuit board (PCB) together with the controller 200.

[0060] The power supply unit 500 uses a DC-DC converter to generate the DC power required to drive the pixel array and display panel driver of the display panel 100. The DC-DC converter may include a charge pump, a regulator, a buck converter, and a boost converter. The power supply unit 500 receives a DC input voltage from a host system (not shown) to generate DC voltages such as gate on-state voltages VGL and VEL, gate off-state voltages VGH and VEH, high-level drive voltage EVDD, and low-level drive voltage EVSS. The gate on-state voltages VGL and VEL, and the gate off-state voltages VGH and VEH, are supplied to the level shifter and gate drive circuit 300. The high-level drive voltage EVDD and the low-level drive voltage EVSS are jointly supplied to pixel P.

[0061] The level shifter 600 boosts the transistor-transistor-logic (TTL) level voltage of the gate control signal GCS input from the controller 200 to gate high voltage VGH and gate low voltage VGL, which can drive the TFTs formed on the display panel 100, and provides the gate high voltage VGH and gate low voltage VGL to the gate drive circuit 300. The gate control signal GCS may include a start signal and a clock signal. The plurality of pixels P of the display panel 100 may include at least a first pixel, a second pixel, and a third pixel. The first pixel, the second pixel, and the third pixel may emit light of different colors. For example, the first pixel may be a red pixel, the second pixel may be a green pixel, and the third pixel may be a blue pixel.

[0062] Multiple pixels P can have the same size or different dimensions. Taking into account the lifespan or color balance of the light-emitting diodes included in each of the first, second, and third pixels, the first, second, and third pixels can be designed to have different sizes.

[0063] Figure 3This is a cross-sectional view showing a display device according to an embodiment of the present disclosure.

[0064] like Figure 3 As shown, in the display device, an array layer 102 including thin-film transistors, light-emitting diodes, and packaging units can be disposed on a substrate 101, and a polarization layer 110 can be disposed on the array layer 102. The display panel 100 can be composed of a substrate 101 and an array layer 102 disposed thereon.

[0065] The back plate 150 can be disposed below the substrate 101, and the metal plate 160 can be disposed below the back plate 150.

[0066] Meanwhile, the black matrix 145 can be disposed on the lower surface of the cover glass 140 in the non-active area, and the touch sensor layer 130 can be disposed below the cover glass 140.

[0067] The cover glass 140 having a touch sensor layer 130 and the substrate 101 having an array layer 102, a polarizing layer 110, a backplate 150 and a metal plate 160 are joined together by a transparent adhesive member (OCA) 120. That is, the touch sensor layer 130 and the polarizing layer 110 are joined together by the transparent adhesive member 120.

[0068] When the touch sensor layer 130 and the polarizing layer 110 are joined by the transparent adhesive member 120, air bubbles may appear at the corners of the display device due to the lack of bonding between the touch sensor layer 130 and the polarizing layer 110 caused by the bending of the touch sensor layer 130. In addition, due to the fluidity of the transparent adhesive member 120, the transparent adhesive member may protrude to the outside due to the force applied during the joining process.

[0069] In this disclosure, a transparent adhesive member 120 may be provided to prevent air bubbles from forming between the touch sensor layer 130 and the transparent adhesive member 120 in the corner area of ​​the display device, and to prevent the transparent adhesive member 120 from protruding to the outside.

[0070] Figure 4 This is a cross-sectional view of the transparent adhesive member 120 according to an embodiment of the present disclosure. Figure 5 This is a plan view of the upper transparent adhesive member 121 of the transparent adhesive member 120 according to an embodiment of the present disclosure. Figure 6 This is a rear view of the plastic film of the transparent adhesive member 120 according to an embodiment of the present disclosure.

[0071] like Figure 4As shown, the transparent adhesive member 120 according to an embodiment of the present disclosure may include an upper transparent adhesive member 121, a plastic film 122, and a lower transparent adhesive member 123. For example, the upper transparent adhesive member 121 may be disposed on the upper surface of the plastic film 122, and the lower transparent adhesive member 123 may be disposed on the lower surface of the plastic film 122.

[0072] Considering the curvature of the touch sensor layer 130, the plastic film 122 can be formed with a thickness that can compensate for the curvature (steps) of the touch sensor layer 130. That is, the plastic film 122 can have convex portions corresponding to the concave portions of the touch sensor layer 130. The plastic film 122 can improve the corner flatness of the display device.

[0073] To prevent the transparent adhesive component 120 from protruding to the outside, the rear surface of the corner portion of the plastic film 122 may be provided with multiple recesses 124, each recess 124 having a trapezoidal structure at the corner portion, such as... Figure 6 As shown. Multiple recesses 124 can be disposed in the non-active region, and each recess 124 can have a depth and width that gradually decrease in the direction toward the edge. That is, as... Figure 4 As shown, among the plurality of recesses 124, the recesses 124 closer to the edge of the transparent adhesive member 120 have a smaller depth and width than the recesses 124 further away from the edge of the transparent adhesive member 120.

[0074] Each recess 124 can be formed as a trapezoidal structure having a structure perpendicular to the rear surface of the plastic film 122 in a direction toward the edge of the transparent adhesive member 120 and an acute-angle structure relative to the rear surface of the plastic film 122 in the opposite direction.

[0075] exist Figure 4 In the diagram, the structure of each recess 124 is shown as a trapezoidal structure; however, the present disclosure is not limited thereto, and the recesses can be formed in various shapes, such as semicircles, triangles, quadrilaterals and pentagons.

[0076] Meanwhile, to prevent air bubbles from forming due to non-bonding at the corners of the display device, multiple channels 126 can be formed on the upper surface of the corner portion of the upper transparent adhesive member 121. Air bubbles can be discharged to the outside through the multiple channels 126, such as... Figure 5 As shown. Multiple channels 126 can be arranged in a fan-shaped pattern.

[0077] Each channel 126 can extend in a direction from the area where bubbles are expected to appear to the edge of the corner portion, and the width of each channel 126 can gradually increase in the direction from the area where bubbles are expected to appear to the edge of the corner portion. That is, as the volume of the channel 126 gradually increases towards the edge of the corner portion, it facilitates the bonding process of the touch sensor layer 130 and the polarization layer 110.

[0078] exist Figure 5 In the diagram, the cross-sectional structure of each channel 126 is shown as a triangle, but this disclosure is not limited thereto. The cross-sectional structure of each channel 126 can be formed in various shapes, such as semicircles and quadrilaterals.

[0079] For reference Figures 4 to 6 The transparent adhesive member 120 may include an upper transparent adhesive member 121, a plastic film 122 and a lower transparent adhesive member 123. A plurality of recesses 124 may be formed on the rear surface of the corner portion of the plastic film 122, and a plurality of channels 126 may be formed on the upper surface of the corner portion of the upper transparent adhesive member 121.

[0080] Therefore, when the touch sensor layer 130 and the polarization layer 110 are joined by the transparent adhesive member 120, bubbles may appear at the corner portion of the display device. However, the bubbles can be discharged to the outside through a plurality of channels 126 formed on the upper surface of the corner portion of the upper transparent adhesive member 121, thereby preventing bubbles from appearing at the corner portion of the display device due to the bending of the touch sensor layer 130.

[0081] Furthermore, although the adhesive member may protrude to the outside due to the force applied during the bonding process, the presence of multiple recesses 124 on the rear surface of the corner portion of the plastic film 122 prevents the transparent adhesive member from protruding due to the flowability of the transparent adhesive member. Additionally, the flatness of the corner portion of the display device can be improved.

[0082] Hereinafter, a method for manufacturing a display device configured as described above according to an embodiment of the present disclosure will be described.

[0083] Figures 7A to 7D This is a cross-sectional view showing a method for manufacturing a display device according to an embodiment of the present disclosure.

[0084] like Figure 7A As shown, a cover glass 140 is fabricated, which is configured such that a black matrix 145 is disposed on the lower surface of the cover glass 140 in the non-active region, and a touch sensor layer 130 is disposed below the cover glass 140. The cover glass 140 having the black matrix 145 and the touch sensor layer 130 is fixed to the rear surface of the upper chamber 170.

[0085] In addition, a transparent adhesive component 120 is prepared.

[0086] For reference Figures 4 to 6 The transparent adhesive member 120 includes a plastic film 122, an upper transparent adhesive member 121 disposed on the upper surface of the plastic film 122, and a lower transparent adhesive member 123 disposed on the lower surface of the plastic film 122. A plurality of channels 126 are formed on the upper surface of the corner portion of the upper transparent adhesive member 121, and a plurality of recesses 124 are formed on the rear surface of the corner portion of the plastic film 122.

[0087] Here, in order to protect the upper transparent adhesive member 121 and the lower transparent adhesive member 123, a first protective film 128 can be further provided on the upper surface of the upper transparent adhesive member 121, and a second protective film 129 can be further provided on the lower surface of the lower transparent adhesive member 123.

[0088] Therefore, the first protective film 128 of the transparent adhesive member 120 is removed, and the transparent adhesive member 120 is located or fixed to the upper surface of the lower chamber 180. That is, the second protective film 129 of the transparent adhesive member 120 is positioned or fixed to contact the upper surface of the lower chamber 180.

[0089] like Figure 7B As shown, the upper chamber 170 is pressed against the lower chamber 180 to bond the transparent adhesive member 120 to the lower surface of the touch sensor layer 130. Specifically, the upper transparent adhesive member 121 of the transparent adhesive member 120 is bonded to the lower surface of the touch sensor layer 130.

[0090] At this time, since multiple channels 126 are formed on the upper surface of the corner portion of the upper transparent adhesive member 121, as shown in the reference... Figure 5 Therefore, bubbles can be prevented from appearing at the corners of the display device due to bending of the touch sensor layer 130.

[0091] like Figure 7C As shown, the upper chamber 170 is separated from the lower chamber 180. That is, the upper chamber 170 moves upward to separate the upper chamber 170 from the lower chamber 180.

[0092] like Figure 7D As shown, a substrate 101 is prepared, and the substrate 101 is configured such that an array layer 102 including a thin film transistor, a light-emitting diode and a packaging unit is disposed on the substrate 101, a polarization layer 110 is disposed on the array layer 102, a back plate 150 is disposed below the substrate 101, and a metal plate 160 is disposed below the back plate 150.

[0093] The substrate 101 configured as described above is located on or fixed to the upper surface of the lower chamber 180.

[0094] Remove the second protective film 129 from the lower surface of the lower transparent adhesive member 123, press the upper chamber 170 against the lower chamber 180, so as to bond the substrate 101 on which the array layer 102, polarization layer 110, back plate 150 and metal plate 160 are disposed to the lower transparent adhesive member 123.

[0095] In reference Figure 7B and Figure 7D In the described bonding process, since multiple recesses 124, each having a trapezoidal structure, are provided on the rear surface of the corner portion of the plastic film 122, the transparent adhesive member 120 can be prevented from protruding to the outside.

[0096] Furthermore, since the plastic film 122 is formed with a thickness that can compensate for the curvature (step) of the touch sensor layer 130, the corner flatness of the display device can be improved.

[0097] According to the present disclosure as described above, the number of defective display devices can be reduced, thereby lowering the unit cost of the product.

[0098] According to this disclosure, ESG (environmental, social, and governance) objectives that can reduce the unit cost of products can be achieved.

[0099] The display device according to various embodiments of this disclosure can be described as follows.

[0100] A display device according to an embodiment of the present disclosure includes: a display panel having an active region and an inactive region; a cover member disposed on the display panel; a touch sensor layer disposed between the display panel and the cover member; and a transparent adhesive member disposed between the display panel and the touch sensor layer, wherein the transparent adhesive member includes: a plastic film having a plurality of recesses disposed on the rear surface of its corner portions; an upper transparent adhesive member disposed on the upper surface of the plastic film; and a lower transparent adhesive member disposed on the lower surface of the plastic film.

[0101] According to embodiments of this disclosure, taking into account the curvature of the touch sensor layer, the plastic film may have a thickness capable of compensating for the curvature of the touch sensor layer.

[0102] According to embodiments of this disclosure, the plastic film may have protruding portions corresponding to the recessed portions of the touch sensor layer.

[0103] According to embodiments of this disclosure, a plurality of recesses may be provided in a non-active region, and each recess may have a depth and width that gradually decrease in the direction toward the edge.

[0104] According to embodiments of this disclosure, each recess may have a trapezoidal structure.

[0105] According to embodiments of this disclosure, the trapezoidal structure of each recess may have a structure perpendicular to the rear surface of the plastic film in a direction toward the edge of the plastic film and an acute-angle structure in the opposite direction.

[0106] According to embodiments of this disclosure, the upper transparent adhesive member may have multiple channels on the upper surface of its corner portion, the multiple channels being configured to allow air bubbles to be discharged to the outside.

[0107] According to embodiments of this disclosure, multiple channels can be arranged in a fan shape, each channel can extend in a direction from the area where bubbles are expected to appear to the edge of the corner portion, and the width of each channel can gradually increase in the direction toward the edge of the corner portion.

[0108] According to an embodiment of this disclosure, each channel may have a triangular cross-sectional structure.

[0109] According to embodiments of the present disclosure, the display device may further include: a polarizing layer disposed between the display panel and the transparent adhesive member; a back plate disposed on the rear surface of the display panel; and a metal plate disposed on the rear surface of the back plate.

[0110] A method for manufacturing a display device according to embodiments of the present disclosure includes: preparing a transparent adhesive member comprising: a plastic film having a plurality of recesses disposed on the rear surface of its corner portions; an upper transparent adhesive member disposed on the upper surface of the plastic film, the upper transparent adhesive member being disposed on the upper surface of its corner portions, the upper transparent adhesive member having a plurality of channels configured to allow air bubbles to be discharged to the outside; and a lower transparent adhesive member disposed on the lower surface of the plastic film; preparing a cover member and a touch sensor layer disposed below the cover member; bonding the upper transparent adhesive member of the transparent adhesive member to the lower surface of the touch sensor layer; and bonding a display panel having active and non-active regions to the lower transparent adhesive member of the transparent adhesive member.

[0111] As is evident from the above description, according to this disclosure, the transparent adhesive member may include an upper transparent adhesive member, a plastic film, and a lower transparent adhesive member, with multiple recesses formed on the rear surface of the corner portion of the plastic film, and multiple channels formed on the upper surface of the corner portion of the upper transparent adhesive member.

[0112] Therefore, when the touch sensor layer and the polarization layer are bonded together by a transparent adhesive member, bubbles may appear at the corners of the display device. However, the bubbles can be discharged to the outside through multiple channels formed on the upper surface of the corners of the upper transparent adhesive member, thereby preventing bubbles from appearing at the corners of the display device due to the bending of the touch sensor layer.

[0113] In addition, since multiple recesses are formed on the rear surface of the corners of the plastic film, the transparent adhesive component can be prevented from protruding to the outside due to the flow of the transparent adhesive component.

[0114] The effects of this disclosure are not limited to those described above, and many more effects are included in this disclosure.

[0115] It will be apparent to those skilled in the art that the above disclosure is not limited to the above embodiments and drawings, and that various substitutions, modifications and changes can be made without departing from the technical concept of the disclosure.

Claims

1.A display device, comprising: a display panel having an active area and a non-active area; a cover member disposed on the display panel; a touch sensor layer disposed between the display panel and the cover member; and a transparent adhesive member disposed between the display panel and the touch sensor layer, wherein the transparent adhesive member comprises: a plastic film having a plurality of recesses disposed at a rear surface of a corner portion of the plastic film; an upper transparent adhesive member disposed on an upper surface of the plastic film; and a lower transparent adhesive member disposed on a lower surface of the plastic film. 2.The display device of claim 1, wherein the plastic film has a thickness capable of compensating for a curvature of the touch sensor layer when the curvature of the touch sensor layer is considered. 3.The display device of claim 2, wherein the plastic film has a convex portion corresponding to a recess of the touch sensor layer. 4.The display device of claim 1, wherein the plurality of recesses are disposed in the non-active area and each have a depth and a width that gradually decrease in a direction toward an edge. 5.The display device of claim 1, wherein each recess has a trapezoidal structure. 6.The display device of claim 5, wherein the trapezoidal structure of each recess has a structure perpendicular to a rear surface of the plastic film in a direction toward an edge of the plastic film and an acute angle structure in an opposite direction. 7.The display device of claim 1, wherein the upper transparent adhesive member is provided with a plurality of channels at an upper surface of a corner portion of the transparent adhesive member, the plurality of channels being configured to allow air bubbles to be discharged to the outside through the plurality of channels. 8.The display device of claim 7, wherein the plurality of channels are provided in a fan shape, each channel extending in a direction from an area in which air bubbles are expected to occur to an edge of the corner portion, and a width of each channel gradually increasing in the direction toward the edge of the corner portion. 9.The display device of claim 7, wherein each channel has a triangular cross-sectional structure. 10.The display device of claim 1, further comprising: a polarizing layer disposed between the display panel and the transparent adhesive member; a back plate disposed on a rear surface of the display panel; and a metal plate disposed on a rear surface of the back plate. 11.A method of manufacturing a display device, the method comprising: ​ ​ A transparent adhesive member including a plastic film having a plurality of recesses provided at a rear surface of a corner portion of the plastic film, an upper transparent adhesive member provided on an upper surface of the plastic film, the upper transparent adhesive member being provided with a plurality of channels at an upper surface of a corner portion of the upper transparent adhesive member, the plurality of channels being configured to allow a bubble to be discharged to the outside through the plurality of channels, a lower transparent adhesive member provided on a lower surface of the plastic film; manufacturing a cover member and a touch sensor layer provided below the cover member; bonding the upper transparent adhesive member of the transparent adhesive member to a lower surface of the touch sensor layer; and bonding a display panel having an active area and a non-active area to the lower transparent adhesive member of the transparent adhesive member. 12.The method of claim 11, wherein the plastic film has a thickness capable of compensating for a curvature of the touch sensor layer when the curvature of the touch sensor layer is considered. 13.The method of claim 12, wherein the plastic film has a convex portion corresponding to a recess of the touch sensor layer. 14.The method of claim 11, wherein the plurality of recesses are provided in the non-active area, and each recess has a depth and a width that gradually decrease in a direction toward an edge. 15.The method of claim 11, wherein each recess has a trapezoidal structure. 16.The method of claim 15, wherein the trapezoidal structure of each recess has a structure perpendicular to a rear surface of the plastic film in a direction toward an edge of the plastic film and an acute angle structure in an opposite direction. 17.The method of claim 11, wherein the plurality of channels are provided in a fan shape, each channel extends in a direction from an area in which a bubble is expected to occur to an edge of the corner portion, and a width of each channel gradually increases in the direction toward the edge of the corner portion. 18.The method of claim 17, wherein each channel has a triangular cross-sectional structure. 19.The method of claim 11, further comprising: forming a polarization layer between the display panel and the transparent adhesive member; providing a back plate on a rear surface of the display panel; and providing a metal plate on a rear surface of the back plate. ​

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