Pressure sensor and display device including the same

Abstract

Provided are a pressure sensor and a display device including the pressure sensor. The pressure sensor and the display device including the pressure sensor include: a first substrate; a pressure sensing layer arranged on one surface of the first substrate; and a driving electrode and a sensing electrode arranged on the pressure sensing layer and spaced apart from each other, wherein the driving electrode and the sensing electrode are arranged on the same layer, and the driving electrode and the sensing electrode are respectively directly arranged on the pressure sensing layer.

Description

Technical Field

[0001] The present invention relates to a pressure sensor and a display device including the pressure sensor. Background Art

[0002] Electronic devices such as smartphones, tablet computers, digital cameras, laptop computers, navigation systems, and smart TVs that provide images to users include display devices for displaying images. The display devices include display panels that generate and display images and various input devices.

[0003] Recently, touch panels that recognize touch input are being widely used in display devices, mainly in smartphones or tablets. Due to the convenience of touch, it has become a trend to replace keyboards (key pads) and other existing physical input devices. Going further from touch panels, research is being conducted to install pressure sensors on display devices and implement pressure sensors as input devices. Summary of the invention

[0004] The technical problem that the present invention intends to solve is to provide a pressure sensor with reduced overall thickness.

[0005] Another technical problem that the present invention intends to solve is to provide a display device including a pressure sensor having an overall reduced thickness.

[0006] The technical problems of the present invention are not limited to the technical problems mentioned above, and those skilled in the art can clearly understand other technical problems not mentioned through the following description.

[0007] A pressure sensor according to an embodiment for solving the technical problem includes: a first substrate; a pressure sensing layer arranged on one surface of the first substrate; and a driving electrode and a sensing electrode arranged on the pressure sensing layer and separated from each other, wherein the driving electrode and the sensing electrode are arranged on the same layer, and the driving electrode and the sensing electrode are both directly arranged on the pressure sensing layer.

[0008] The pressure sensing layer may include: a first portion disposed on the one side of the first substrate; and a plurality of second portions protruding from the first portion toward the sensing electrode and the driving electrode.

[0009] The second portion may be in direct contact with the driving electrode and the sensing electrode.

[0010] The first portion may be spaced apart from the driving electrode and the sensing electrode by a spacing space.

[0011] A first contact area between the second portion and the driving electrode and the sensing electrode before pressure is applied to the pressure sensor may be smaller than a second contact area between the second portion and the driving electrode and the sensing electrode after pressure is applied to the pressure sensor.

[0012] The cross-sectional shape of the second portion may include a semicircle, a semi-ellipse, a triangle, a trapezoid, or a quadrilateral.

[0013] The pressure sensing layer may include: a first portion disposed on the one side of the first substrate; and a plurality of second portions recessed from the first portion toward the first substrate.

[0014] The plurality of second portions may be arranged to overlap the driving electrode and the sensing electrode in a thickness direction of the pressure sensing layer, and arranged not to overlap a space between the driving electrode and the sensing electrode.

[0015] The driving electrode may include: a first driving electrode portion; and a second driving electrode portion protruding from the first driving electrode portion toward the pressure sensing layer, wherein the sensing electrode includes: a first sensing electrode portion; and a second sensing electrode portion protruding from the first sensing electrode portion toward the pressure sensing layer.

[0016] The second driving electrode portion may be in direct contact with the pressure sensing layer, and the second sensing electrode portion may be in direct contact with the pressure sensing layer.

[0017] The driving electrode and the sensing electrode may each include a concave pattern concave in a direction opposite to a direction facing the pressure sensing layer.

[0018] The driving electrode and the sensing electrode may both extend along a first direction, and there are multiple driving electrodes and multiple sensing electrodes. On a plane, the multiple driving electrodes and the multiple sensing electrodes are alternately arranged along a second direction intersecting the first direction, and one driving electrode and one sensing electrode each include multiple patterns.

[0019] According to another embodiment for solving the technical problem, a pressure sensor includes: a first substrate; a second substrate facing the first substrate; a pressure sensing layer arranged on a surface of the first substrate facing the second substrate; and a driving electrode and a sensing electrode arranged on a surface of the second substrate facing the first substrate and separated from each other, wherein the driving electrode and the sensing electrode are arranged on the same layer, and the pressure sensing layer includes a concave-convex structure on a surface facing the driving electrode and the sensing electrode.

[0020] According to another embodiment for solving the technical problem, a display device is provided with: a display panel; and a pressure sensor arranged at the lower part of the display panel, wherein the pressure sensor comprises: a first substrate; a pressure sensing layer arranged on one surface of the first substrate; and a driving electrode and a sensing electrode arranged on the pressure sensing layer and separated from each other, wherein the driving electrode and the sensing electrode are arranged on the same layer, and the driving electrode and the sensing electrode are both directly arranged on the pressure sensing layer.

[0021] The pressure sensing layer may include: a first portion disposed on the one side of the first substrate; and a plurality of second portions protruding from the first portion toward the sensing electrode and the driving electrode.

[0022] The pressure sensing layer may include: a first portion disposed on the one side of the first substrate; and a plurality of second portions recessed from the first portion toward the first substrate.

[0023] The plurality of second portions may be arranged to overlap the driving electrode and the sensing electrode in a thickness direction of the pressure sensing layer, and arranged not to overlap a space between the driving electrode and the sensing electrode.

[0024] The driving electrode includes: a first driving electrode portion; and a second driving electrode portion, which protrudes from the first driving electrode portion toward the pressure sensing layer, and the sensing electrode includes: a first sensing electrode portion; and a second sensing electrode portion, which protrudes from the first sensing electrode portion toward the pressure sensing layer, wherein the second driving electrode portion is in direct contact with the pressure sensing layer, and the second sensing electrode portion can be in direct contact with the pressure sensing layer.

[0025] The driving electrode and the sensing electrode may each include a concave pattern concave in a direction opposite to a direction facing the pressure sensing layer.

[0026] The driving electrodes and the sensing electrodes both extend along a first direction, and there are multiple driving electrodes and multiple sensing electrodes. On a plane, the multiple driving electrodes and the multiple sensing electrodes are alternately arranged along a second direction intersecting the first direction, and one driving electrode and one sensing electrode may each include multiple patterns.

[0027] Details of other embodiments are included in the detailed description and accompanying drawings.

[0028] According to the pressure sensor and the display device including the pressure sensor according to an embodiment, the pressure sensor is constructed as one layer, so that the overall thickness can be reduced.

[0029] The effects according to the embodiment are not limited to those shown above, and more various effects are included in this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a perspective view of a display device according to an embodiment.

[0031] Figure 2 is an exploded perspective view of a display device according to an embodiment.

[0032] Figure 3 Is shown attached to Figure 2 A bottom view of an example of a display panel with a cover window.

[0033] Figure 4 It is shown Figure 2 A plan view of an example of a lower frame.

[0034] Figure 5 It is shown Figure 2 A plan view of an example of a main circuit board.

[0035] Figure 6 It is shown Figure 3 A cross-sectional view of an example of I-I'.

[0036] Figure 7 is a cross-sectional view showing the display area of ​​the display panel in detail.

[0037] Figure 8 is a perspective view showing a pressure sensor according to an embodiment.

[0038] Fig. 9 is a plan view showing a pressure sensor according to an embodiment.

[0039] Fig.10 It is shown Fig. 9 An enlarged plan view of an example of region A.

[0040] Fig.11 It is shown Fig.10 An enlarged plan view of an example of the A-1 region.

[0041] Fig.12 It is shown Fig.11 A cross-sectional view of an example of II-II'.

[0042] Fig.13 is a cross-sectional view of a pressure sensor according to an embodiment when pressure is applied.

[0043] Fig.14 is a cross-sectional view of a pressure sensor according to another embodiment.

[0044] Fig.15is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0045] Fig.16 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0046] Fig.17 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0047] Fig.18 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0048] Fig.19 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0049] Fig. 20 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0050] Fig.21 is an enlarged plan view of a pressure sensor according to still another embodiment.

[0051] Fig. 22 is along Fig.21 A cross-sectional view taken along line XXII-XXII'.

[0052] Fig.23 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0053] Fig.24 is an enlarged plan view of a pressure sensor according to still another embodiment.

[0054] Fig.25 is along Fig.24 Cross-sectional view taken along line XXV-XXV'.

[0055] Fig.26 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0056] Fig. 27 is an enlarged plan view of a pressure sensor according to still another embodiment.

[0057] Fig.28 is along Fig. 27 A cross-sectional view taken along line XXVIII-XXVIII'.

[0058] Fig.29 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0059] Fig.30 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0060] Description of Reference Numerals

[0061] 10: Display device 100: Cover window

[0062] 200: Touch sensing device 210: Touch circuit board

[0063] 220: Touch driving unit 300: Display panel

[0064] 310: display circuit board 311: first circuit board

[0065] 312: second circuit board 313: first connecting cable

[0066] 314: second connection cable 320: display drive unit

[0067] 330: pressure sensing part 400: lower panel part

[0068] 510: first pressure sensor 520: second pressure sensor

[0069] 550: pressure sensing circuit board 540: second flexible circuit board

[0070] 530: first bump 600: lower frame

[0071] 610: Waterproof component 700: Main circuit board

[0072] 710: Main processor 720: Camera device

[0073] 730: Main connector 900: Lower cover DETAILED DESCRIPTION

[0074] References and Attachments Figure 1 The advantages and features of the present invention and the methods for achieving these can be clearly seen from the embodiments described in detail below. However, the present invention can be implemented in a variety of different forms and is not limited to the embodiments disclosed below. This embodiment is only used to make the disclosure of the present invention complete and is provided to fully inform the scope of the invention to those with ordinary knowledge in the technical field to which the present invention belongs. The present invention is defined only by the scope of the claims.

[0075] Elements or layers are referred to as being "on" other elements or layers, including being immediately above other elements or layers or being sandwiched between other layers or elements. Throughout the specification, the same reference numerals refer to the same constituent elements. Since the shapes, sizes, ratios, angles, quantities, etc. shown in the drawings for the purpose of illustrating the embodiments are exemplary, the present invention is not limited to the contents shown in the drawings.

[0076] Although the terms first, second, etc. are used to describe a variety of components, these components are obviously not limited to these terms. These terms are only used to distinguish one component from another component. Therefore, the first component mentioned below can obviously also be the second component within the technical concept of the present invention.

[0077] The various features of the multiple embodiments of the present invention may be partially or completely combined or combined with each other, may be technically linked and driven in various ways, and the various embodiments may be implemented independently of each other or implemented together in a related relationship.

[0078] Specific embodiments are described below with reference to the accompanying drawings.

[0079] Figure 1 is a perspective view of a display device according to an embodiment. Figure 2 is an exploded perspective view of a display device according to an embodiment.

[0080] Reference Figure 1 and Figure 2 According to one embodiment, a display device 10 includes a cover window 100, a touch sensing device 200, a touch circuit board 210, a touch driving unit 220, a display panel 300, a display circuit board 310, a display driving unit 320, a pressure sensing unit 330, a first pressure sensor 510, a second pressure sensor 520, a pressure sensing circuit board 550, a lower frame 600, a main circuit board 700 and a lower cover 900.

[0081] In this specification, "upper", "top", and "above" refer to the direction in which the cover window 100 is arranged with respect to the display panel 300, that is, the Z-axis direction, and "lower", "bottom", and "below" refer to the direction in which the lower frame 600 is arranged with respect to the display panel 300, that is, the opposite direction of the Z-axis direction. In addition, "left", "right", "upper", and "lower" refer to directions when the display panel 300 is viewed on a plane. For example, "left" refers to the opposite direction of the X-axis, "right" refers to the X-axis direction, "upper" refers to the Y-axis direction, and "lower" refers to the opposite direction of the Y-axis direction.

[0082] The display device 10 may be configured in a rectangular shape on a plane. Figure 1 and Figure 2 , the display device 10 may have a rectangular planar shape as follows: having a short side along a first direction (X-axis direction) and a long side along a second direction (Y-axis direction). The corner where the short side in the first direction (X-axis direction) and the long side in the second direction (Y-axis direction) intersect may be formed into an arc or a right angle in a manner having a predetermined curvature. The planar shape of the display device 10 is not limited to a rectangle, and may also be formed into other polygonal, circular, or elliptical shapes.

[0083] The display device 10 may include a first region DR1 formed to be flat and a second region DR2 extending from the left and right sides of the first region DR1. The second region DR2 may be formed to be flat or to be formed as a curved surface. In the case where the second region DR2 is formed to be flat, the angle formed by the first region DR1 and the second region DR2 may be an obtuse angle. In the case where the second region DR2 is formed to be a curved surface, it may have a predetermined curvature or have a varying curvature.

[0084] Although in Figure 1 , the second region DR2 extends to the left and right sides of the first region DR1, but the present invention is not limited thereto. That is, the second region DR2 may extend only to one of the left and right sides of the first region DR1. Alternatively, the second region DR2 may extend not only to the left and right sides of the first region DR1, but also to at least one of the upper and lower sides. The following description will focus on the case where the second region DR2 is arranged at the left and right edges of the display device 10.

[0085] The cover window 100 may be arranged on the upper portion of the display panel 300 in a manner of covering the upper surface of the display panel 300. Therefore, the cover window 100 may function to protect the upper surface of the display panel 300. Figure 6 As shown, the cover window 100 may be attached to the touch sensing device 200 through a first adhesive member 910. The first adhesive member 910 may be a transparent adhesive film (OCA: optically cleared adhesive film) or a transparent adhesive resin (OCR: optically cleared resin).

[0086] The cover window 100 may include a transmissive portion DA100 corresponding to the display panel 300 and a light shielding portion NDA100 corresponding to an area outside the display panel 300. The cover window 100 may be arranged in the first area DR1 and the second area DR2. The transmissive portion DA100 may be arranged in a portion of the first area DR1 and a portion of the second area DR2. The light shielding portion NDA100 may be formed to be opaque. Alternatively, the light shielding portion NDA100 may be formed using a decorative layer having a pattern that can be displayed to a user without displaying an image. For example, the light shielding portion NDA100 may be patterned with a company logo such as "SAMSUNG" or a variety of text. In addition, a hole HH for exposing a front camera, a front speaker, an infrared sensor, an iris recognition sensor, an ultrasonic sensor, an illuminance sensor, etc. may be formed in the light shielding portion NDA100, but is not limited thereto. For example, part or all of the front camera, the front speaker, the infrared sensor, the iris recognition sensor, the ultrasonic sensor, and the illumination sensor may be built into the display panel 300 , in which case part or all of the holes HH may be removed.

[0087] The cover window 100 may be formed of glass, sapphire, and / or plastic. The cover window 100 may be rigidly or flexibly formed.

[0088] The touch sensing device 200 may be disposed between the cover window 100 and the display panel 300. The touch sensing device 200 may be disposed in the first region DR1 and the second region DR2. Therefore, the user's touch may be sensed not only in the first region DR1 but also in the second region DR2.

[0089] like Figure 6 As shown, the touch sensing device 200 may be attached to the lower surface of the cover window 100 through the first adhesive member 910. In order to prevent the visual recognition from being reduced due to the reflection of external light, a polarizing film may be attached to the touch sensing device 200. In this case, the polarizing film may be attached to the lower surface of the cover window 100 through the first adhesive member 910.

[0090] The touch sensing device 200, as a device for sensing the touch position of the user, can be implemented in a capacitance mode such as a self-capacitance mode or a mutual capacitance mode. When the touch sensing device 200 is implemented in a self-capacitance mode, it only includes a touch drive electrode. On the contrary, when it is implemented in a mutual capacitance mode, it can include a touch drive electrode and a touch sensing electrode. The following description is centered on the case where the touch sensing device 200 is implemented in a mutual capacitance mode.

[0091] The touch sensing device 200 may be formed in a panel form or a film form. Figure 6 As shown, the touch sensing device 200 may be attached to the thin film encapsulation film of the display panel 300 by the second adhesive member 920. The second adhesive member 920 may be a transparent adhesive film (OCA) or a transparent adhesive resin (OCR).

[0092] Alternatively, the touch sensing device 200 may be formed as one body with the display panel 300. In this case, the touch driving electrodes and the touch sensing electrodes of the touch sensing device 200 may be formed on the thin film encapsulation film of the display panel 300.

[0093] A touch circuit board 210 may be attached to one side of the touch sensing device 200. Specifically, one side of the touch circuit board 210 may be attached to a pad provided on one side of the touch sensing device 200 using an anisotropic conductive film. Also, a touch connection portion may be provided on the other side of the touch circuit board 210, such as Figure 3 As shown, the touch connection portion may be connected to a touch connection member 312a of the display circuit board 310. The touch circuit board 210 may be a flexible printed circuit board.

[0094] The touch driving unit 220 may apply a touch driving signal to the touch driving electrodes of the touch sensing device 200, sense a sensing signal from the touch sensing electrodes of the touch sensing device 200, and analyze the sensing signal to calculate the user's touch position. The touch driving unit 220 may be formed as an integrated circuit and mounted on the touch circuit board 210.

[0095] The display panel 300 may be disposed at the lower portion of the touch sensing device 200. The display panel 300 may be disposed to overlap the transmissive portion DA100 of the cover window 100. The display panel 300 may be disposed in the first region DR1 and the second region DR2. Therefore, the image of the display panel 300 may be seen not only in the first region DR1 but also in the second region DR2.

[0096] The display panel 300 may be a light emitting display panel including a light emitting element. For example, the display panel 300 may be an organic light emitting display panel using an organic light emitting diode, an ultra-small light emitting diode display panel using a micro LED, and a quantum dot light emitting display panel including a quantum dot light emitting diode. Figure 7 The description will focus on the case of the organic light emitting display panel shown.

[0097] like Figure 7 As shown, the display area of ​​the display panel 300 represents the area where the light emitting element layer 304 is formed and displays an image, and the non-display area represents the surrounding area of ​​the display area. The display panel 300 may include a supporting substrate 301, a flexible substrate 302, a thin film transistor layer 303, a light emitting element layer 304, and a thin film encapsulation layer 305.

[0098] A flexible substrate 302 is arranged on the support substrate 301. The support substrate 301 and the flexible substrate 302 may include a flexible polymer material, respectively. For example, the support substrate 301 and the flexible substrate 302 may include polyethersulfone (PES), polyacrylate (PA), polyarylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyallylate, polyimide (PI), polycarbonate (PC), cellulose triacetate (CAT), cellulose acetate propionate (CAP), or a combination thereof, respectively.

[0099] A thin film transistor layer 303 is formed on the flexible substrate 302. The thin film transistor layer 303 includes a thin film transistor 335, a gate insulating film 336, an interlayer insulating film 337, a protective film 338, and a planarizing film 339.

[0100] A buffer film may be formed on the flexible substrate 302. In order to protect the thin film transistor 335 and the light emitting element from moisture that penetrates through the support substrate 301 and the flexible substrate 302, which are easily permeated by moisture, the buffer film may be formed on the flexible substrate 302. The buffer film may be formed by alternately stacking a plurality of inorganic films. For example, the buffer film may be formed by combining a silicon oxide film (SiO x ), silicon nitride film (SiN x ), a multi-layer film in which one or more inorganic films in SiON are alternately stacked. The buffer film can be omitted.

[0101] A thin film transistor 335 is formed on the buffer film. The thin film transistor 335 includes an active layer 331, a gate electrode 332, a source electrode 333, and a drain electrode 334. Figure 7 The thin film transistor 335 is shown as being formed in an upper gate (top gate) manner in which the gate electrode 332 is located at the upper part of the active layer 331, but it should be noted that the present invention is not limited thereto. That is, the thin film transistor 335 may be formed in a lower gate (bottom gate) manner in which the gate electrode 332 is located at the lower part of the active layer 331 or in a double gate manner in which the gate electrode 332 is located at both the upper part and the lower part of the active layer 331.

[0102] An active layer 331 is formed on the buffer film. The active layer 331 may be formed using a silicon-based semiconductor material or an oxide-based semiconductor material. A light shielding layer for blocking external light incident on the active layer 331 may be formed between the buffer film and the active layer 331 .

[0103] A gate insulating film 336 may be formed on the active layer 331. The gate insulating film 336 may be formed of an inorganic film (eg, a silicon oxide film (SiO x ), silicon nitride film (SiN x ) or their multiple films).

[0104] A gate electrode 332 and a gate line may be formed on the gate insulating film 336. The gate electrode 332 and the gate line may be formed by a single layer or multiple layers using any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or alloys thereof.

[0105] An interlayer insulating film 337 may be formed on the gate electrode 332 and the gate line. The interlayer insulating film 337 may be made of an inorganic film (eg, a silicon oxide film (SiO x ), silicon nitride film (SiN x ) or their multiple films).

[0106] A source electrode 333, a drain electrode 334, and a data line may be formed on the interlayer insulating film 337. The source electrode 333 and the drain electrode 334 may be connected to the active layer 331 through contact holes penetrating the gate insulating film 336 and the interlayer insulating film 337, respectively. The source electrode 333, the drain electrode 334, and the data line may be formed by a single layer or a multilayer using any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy thereof.

[0107] A protective film 338 for insulating the thin film transistor 335 may be formed on the source electrode 333, the drain electrode 334, and the data line. The protective film 338 may be made of an inorganic film (eg, a silicon oxide film (SiO x ), silicon nitride film (SiN x ) or their multiple films) are formed.

[0108] A planarization film 339 for flattening a step difference caused by the thin film transistor 335 may be formed on the protective film 338. The planarization film 339 may be formed using an organic film such as acryl resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin.

[0109] A light emitting element layer 304 is formed on the thin film transistor layer 303. The light emitting element layer 304 includes a light emitting element and a pixel defining film 344.

[0110] A light emitting element and a pixel defining film 344 are formed on the planarization film 339 . The light emitting element may be an organic light emitting element. In this case, the light emitting element may include an anode electrode 341 , a light emitting layer 342 , and a cathode electrode 343 .

[0111] The anode electrode 341 may be formed on the planarization film 339. The anode electrode 341 may be connected to the drain electrode 334 of the thin film transistor 335 through a contact hole penetrating the protection film 338 and the planarization film 339.

[0112] The pixel defining film 344 may be formed on the planarization film 339 to cover the edge of the anode electrode 341 in order to divide the pixels. That is, the pixel defining film 344 plays the role of a pixel defining film that defines the pixels. Each pixel represents a region where the anode electrode 341, the light emitting layer 342, and the cathode electrode 343 are sequentially stacked, so that holes from the anode electrode 341 and electrons from the cathode electrode 343 are combined with each other in the light emitting layer 342 to emit light.

[0113] A light-emitting layer 342 is formed on the anode electrode 341 and the pixel defining film 344. The light-emitting layer 342 may be an organic light-emitting layer. The light-emitting layer 342 may emit one of red light, green light, and blue light. The peak wavelength range of the red light may be approximately 620nm to 750nm, and the peak wavelength range of the green light may be approximately 495nm to 570nm. Also, the peak wavelength range of the blue light may be approximately 450nm to 495nm. Alternatively, the light-emitting layer 342 may be a white light-emitting layer that emits white light, in which case it may have a stacked form of a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer, and may be a common layer formed together in the pixel. In this case, the display panel 300 may further include a separate color filter for displaying red, green, and blue.

[0114] The light emitting layer 342 may include a hole transporting layer, a light emitting layer, and an electron transporting layer. Also, the light emitting layer 342 may be formed into a tandem structure of two or more stacks, in which case a charge generating layer may be formed between the stacks.

[0115] The cathode electrode 343 is formed on the light emitting layer 342. The cathode electrode 343 may be formed to cover the light emitting layer 342. The cathode electrode 343 may be a common layer commonly formed in the pixel.

[0116] In the case where the light emitting element layer 304 is formed in a top emission mode that emits light in an upward direction, the anode electrode 341 can be formed using a metal material with high reflectivity such as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and ITO (ITO / Al / ITO), an APC alloy, and a stacked structure of an APC alloy and ITO (ITO / APC / ITO). The APC alloy is an alloy of silver (Ag), palladium (Pd), and copper (Cu). In addition, the cathode electrode 343 can be formed using a transparent metal material (TCO: Transparent Conductive Material) such as ITO and IZO that can transmit light, or a semi-transmissive metal material (Semi-transmissive Conductive Material) such as magnesium (Mg), silver (Ag), or an alloy of magnesium (Mg) and silver (Ag). In the case where the cathode electrode 343 is formed using a semi-transmissive metal material, the light extraction efficiency can be improved by means of a micro cavity.

[0117] In the case where the light emitting element layer 304 is formed in a bottom emission mode that emits light in a downward direction, the anode electrode 341 can be formed using a transparent metal material (TCO: Transparent Conductive Material) such as ITO and IZO or a semi-transparent metal material such as magnesium (Mg), silver (Ag) or an alloy of magnesium (Mg) and silver (Ag). The cathode electrode 343 can be formed using a metal material with high reflectivity such as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and ITO (ITO / Al / ITO), an APC alloy, and a stacked structure of an APC alloy and ITO (ITO / APC / ITO). In the case where the anode electrode 341 is formed using a semi-transparent metal material, the light extraction efficiency can be improved with the help of a microcavity.

[0118] A thin film encapsulation layer 305 is formed on the light emitting element layer 304. The thin film encapsulation layer 305 serves to prevent oxygen or moisture from penetrating into the light emitting layer 342 and the cathode electrode 343. To this end, the thin film encapsulation layer 305 may include at least one inorganic film. The inorganic film may be formed using silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide or titanium oxide. In addition, the thin film encapsulation layer 305 may also include at least one organic film. In order to prevent foreign matter (particles) from passing through the thin film encapsulation layer 305 and entering the light emitting layer 342 and the cathode electrode 343, the organic film may be formed with sufficient thickness. The organic film may include one of epoxy resin, acrylate and urethane acrylate.

[0119] A display circuit board 310 may be attached to one side of the display panel 300. Specifically, one side of the display circuit board 310 may be attached to a pad provided on one side of the display panel 300 using an anisotropic conductive film. The display circuit board 310 may be bent toward the bottom of the display panel 300. The touch circuit board 210 may also be bent toward the bottom of the display panel 300. Therefore, the touch connection portion disposed at one end of the touch circuit board 210 may be connected to the touch connection member 312a of the display circuit board 310. The detailed description of the display circuit board 310 will be combined with Figure 3 and Figure 4 And then described.

[0120] The display driver 320 outputs signals and voltages for driving the display panel 300 through the display circuit board 310. Although the display driver 320 may be formed as an integrated circuit and mounted on the display circuit board 310, it is not limited thereto. For example, the display driver 320 may be directly attached to the substrate of the display panel 300, and in this case, may be attached to the upper side or the lower side of the substrate of the display panel 300.

[0121] like Figure 6 As shown, a panel lower part 400 may be disposed below the display panel 300. The panel lower part 400 may be attached to the lower side of the display panel 300 by a third adhesive part 930. The third adhesive part 930 may be a transparent adhesive film (OCA) or a transparent adhesive resin (OCR).

[0122] The panel lower part 400 may include at least one of a light absorbing part for absorbing light incident from the outside, a buffer part for absorbing impact from the outside, a heat dissipating part for efficiently releasing heat of the display panel 300, and a light shielding layer for blocking light incident from the outside.

[0123] The light absorbing member may be disposed at the lower portion of the display panel 300. The light absorbing member prevents components disposed at the lower portion of the light absorbing member (i.e., the first pressure sensor 510, the second pressure sensor 520, the display circuit board 310, etc.) from being visible from the upper portion of the display panel 300 by blocking the transmission of light. The light absorbing member may include a light absorbing substance such as a black pigment or dye.

[0124] The buffer component may be arranged at the lower part of the light absorbing component. The buffer component absorbs external impact to prevent the display panel 300 from being damaged. The buffer component may be formed as a single layer or multiple layers. For example, the buffer component may be formed using a polymer resin such as polyurethane, polycarbonate, polypropylene, polyethylene, or may include elastic materials such as rubber, urethane, or sponge formed by foaming acrylic materials. The buffer component may be a cushion layer.

[0125] The heat dissipation component may be arranged at the bottom of the buffer component. The heat dissipation component may include: a first heat dissipation layer including graphite or carbon nanotubes, etc.; a second heat dissipation layer formed by using a metal film such as copper, nickel, ferrite, silver, etc. that can shield electromagnetic waves and has excellent thermal conductivity.

[0126] The first pressure sensor 510 and the second pressure sensor 520 may be arranged in the second region DR2. That is, the first pressure sensor 510 may be arranged at the lower portion of the display panel 300 at the right edge of the display panel 300. The second pressure sensor 520 may be arranged at the lower portion of the display panel 300 at the left edge of the display panel 300. Figure 1 and Figure 2 , the left side and the right side of the display panel 300 are sides facing each other.

[0127] The first pressure sensor 510 and the second pressure sensor 520 may be attached to the lower side of the panel lower part 400. The first pressure sensor 510 and the second pressure sensor 520 may be connected to the display circuit board 310 through the pressure sensing circuit board 550. Figure 3 The first pressure sensor 510 and the second pressure sensor 520 are connected to one pressure sensing circuit board 550 , but the present invention is not limited thereto. The first pressure sensor 510 and the second pressure sensor 520 may be connected to the display circuit board 310 through different pressure sensing circuit boards 550 .

[0128] like Figure 3 As shown, a pressure sensing unit 330 for driving the first pressure sensor 510 and the second pressure sensor 520 to sense pressure may be mounted on the display circuit board 310. In this case, the pressure sensing unit 330 may be formed as an integrated circuit. The pressure sensing unit 330 may be integrated into the display driving unit 320 to form an integrated circuit.

[0129] Alternatively, the pressure sensing circuit board 550 may be connected to the touch circuit board 210 instead of the display circuit board 310. In this case, the pressure sensing unit 330 may be mounted on the touch circuit board 210. The pressure sensing unit 330 may be integrated with the touch driving unit 220 to form an integrated circuit.

[0130] A lower frame 600 may be disposed at a lower portion of the panel lower part 400. The lower frame 600 may include synthetic resin, metal, or both.

[0131] The waterproof member 610 may be disposed at the edge of the lower frame 600. The waterproof member 610 may be disposed outside the first pressure sensor 510 and outside the second pressure sensor 520. The waterproof member 610 may be bonded to the upper surface of the panel lower member 400 and the lower surface of the lower frame 600.

[0132] according to Figure 1 and Figure 2 In the embodiment shown, since the waterproof member 610 is arranged outside the first pressure sensor 510 and outside the second pressure sensor 520, the waterproof member 610 can prevent moisture or dust from penetrating between the display panel 300 and the lower frame 600. That is, a display device 10 capable of being waterproof and dustproof can be provided.

[0133] The lower frame 600 may be formed with: a first camera hole CMH1 for inserting the camera device 720; a battery hole BH for heat dissipation of the battery; and a cable hole CAH for passing the second connection cable 314 connected to the display circuit board 310. Specifically, the cable hole CAH may be arranged close to the right edge of the lower frame 600. In this case, the cable hole CAH may be covered by the first pressure sensor 510 arranged at the lower part of the panel lower part 400 at the right edge of the display panel 300. Therefore, as Figure 2 As shown, the first pressure sensor 510 may include a first recessed portion NTH1 formed in a notch shape at one side in order to expose the cable hole CAH without being covered.

[0134] Also, the lower frame 600 is disposed below the panel lower part 400, the first pressure sensor 510, and the second pressure sensor 520. In a case where pressure is applied to the first pressure sensor 510 and the second pressure sensor 520, the lower frame 600 may support the first pressure sensor 510 and the second pressure sensor 520. Therefore, the first pressure sensor 510 and the second pressure sensor 520 may sense the applied pressure.

[0135] A main circuit board 700 may be disposed at a lower portion of the lower frame 600. The main circuit board 700 may be a printed circuit board such as a flexible printed circuit board.

[0136] The main circuit board 700 may include a main processor 710, a camera device 720, and a main connector 730. The main processor 710 and the main connector 730 may be disposed on the lower surface of the main circuit board 700 facing the lower cover 900. Also, the camera device 720 may be disposed on both the upper and lower surfaces of the main circuit board 700.

[0137] The main processor 710 can control all functions of the display device 10. For example, the main processor 710 can output image data to the display driver 320 of the display circuit board 310 so that the display panel 300 displays an image. In addition, the main processor 710 can run the application indicated by the icon displayed at the user's touch position after receiving touch data from the touch driver 220 and determining the user's touch position. In addition, the main processor 710 can receive pressure sensing data from the touch driver 220 or the pressure sensing unit 330, and run the application indicated by the icon displayed at the user's pressure position according to the pressure sensing data. In addition, the main processor 710 can be controlled so that the vibration generating device 901 vibrates according to the pressure sensing data to achieve haptic. The main processor 710 can be an application processor (application processor), a central processing unit (central processing unit) or a system chip (system chip) composed of an integrated circuit.

[0138] The camera device 720 may process image frames such as still images or videos acquired by an image sensor in a camera mode and output the processed images to the main processor 710 .

[0139] The second connection cable 314 passing through the cable hole CAH of the lower frame 600 may be connected to the main connector 730 disposed on the lower surface of the main circuit board 700 through the gap between the lower frame 600 and the main circuit board 700. Therefore, the main circuit board 700 may be electrically connected to the display circuit board 310 and the touch circuit board 210.

[0140] In addition, a mobile communication module capable of transmitting and receiving wireless signals with at least one of a base station, an external terminal, and a server on a mobile communication network may be installed on the main circuit board 700. The wireless signal may include data in various forms based on transmitting and receiving voice signals, video call signals, or text / multimedia information. In addition, a sound output device such as a loudspeaker capable of outputting sound may also be installed on the main circuit board 700.

[0141] The lower cover 900 may be disposed at the lower portion of the lower frame 600 and the main circuit board 700. The lower cover 900 may be fastened to the lower frame 600 to be fixed. The lower cover 900 may form a lower appearance of the display device 10. The lower cover 900 may include plastic and / or metal.

[0142] The lower cover 900 may be formed with a second camera hole CMH2 into which the camera device 720 is inserted and protrudes to the outside. The position of the camera device 720 and the positions of the first camera hole CMH1 and the second camera hole CMH2 corresponding to the camera device 720 are not limited to Figure 1 , Figure 2 , Figure 4 as well as Figure 5 The embodiment shown.

[0143] Furthermore, a vibration generating device 901 may be arranged on the upper surface of the lower cover 900, and the vibration generating device 901 may be connected to the lower surface of the main circuit board 700. Therefore, the vibration generating device 901 may generate vibration in response to the vibration signal of the main processor 710. The vibration generating device 901 may be any one of an eccentric rotating mass (ERM), a linear resonant actuator (LRA), and a piezoelectric actuator (piezo actuator).

[0144] Figure 3 Is shown attached to Figure 2 A bottom view of an example of a display panel with a cover window, Figure 4 It is shown Figure 2 A plan view of an example of a lower frame. Figure 5 It is shown Figure 2 A plan view of an example of a main circuit board.

[0145] Below, refer to Figures 3 to 5 The connection between the display circuit board 310 and the pressure sensing circuit board 550 and the connection between the second connection cable 314 and the main connection member 730 of the main circuit board 700 are described in detail. Figure 4 It is a plan view, but Figure 3 and Figure 5 is a bottom view, so it should be noted that Figure 3 and Figure 5 middle, Figure 4 The display device 10 is shown upside down. Figure 4 The display circuit board 310 is shown in dotted lines. Figure 5 The second connecting cable 314 is shown in dashed lines.

[0146] Reference Figures 3 to 5 The display circuit board 310 may include a first circuit board 311 , a second circuit board 312 , and a first connection cable 313 .

[0147] The first circuit board 311 is attached to one side of the upper or lower side of the substrate of the display panel 300, and can be bent toward the lower side of the substrate of the display panel 300. The first circuit board 311 can be fixed by a fixing member such as Figure 4 As shown, the bracket is fixed to a fixing hole FH formed in the lower frame 600 .

[0148] The first circuit board 311 may include a display driving unit 320 , a pressure sensing unit 330 , a first connector 311 a , and a second connector 311 b . The display driving unit 320 , the pressure sensing unit 330 , the first connector 311 a , and the second connector 311 b may be arranged on one surface of the first circuit board 311 .

[0149] The first connector 311a may be connected to one end of a first connection cable 313 connected to the second circuit board 312. Therefore, the display driving part 320 and the pressure sensing part 330 mounted on the first circuit board 311 may be electrically connected to the second circuit board 312 through the first connection cable 313.

[0150] The second connector 311 b may be connected to one end of the pressure sensing circuit board 550 connected to the first pressure sensor 510 and the second pressure sensor 520 . Therefore, the first pressure sensor 510 and the second pressure sensor 520 may be electrically connected to the pressure sensing part 330 .

[0151] The second circuit board 312 may include a touch connector 312a, a first connection connector 312b, and a second connection connector 312c. The first connection connector 312b and the second connection connector 312c may be arranged on one side of the second circuit board 312, and the touch connector 312a may be arranged on the other side of the second circuit board 312.

[0152] The touch connector 312a may be connected to a touch connection portion disposed at one end of the touch circuit board 210. Therefore, the touch driving part 220 may be electrically connected to the second circuit board 312.

[0153] The first connection connector 312b may be connected to the other end of the first connection cable 313 connected to the first circuit board 311. Therefore, the display driving part 320 and the pressure sensing part 330 mounted on the first circuit board 311 may be electrically connected to the second circuit board 312 through the first connection cable 313.

[0154] The second connection connector 312c may be connected to one end of the second connection cable 314 connected to the main connector 730 of the main circuit board 700. Therefore, the second circuit board 312 may be electrically connected to the main connector 730 disposed on the lower side of the main circuit board 700 through the second connection cable 314.

[0155] A connector connection portion 315 may be formed at the other end of the second connection cable 314. The connector connection portion 315 of the second connection cable 314 may be formed as shown in FIG. Figure 3 and Figure 4 As shown, the first pressure sensor 510 extends to the lower part of the lower frame 600 through the cable hole CAH of the lower frame 600. Since a first recessed portion NTH1 in the form of a notch is formed at an area corresponding to the cable hole CAH of the lower frame 600 on the inner side of the first pressure sensor 510, the cable hole CAH of the lower frame 600 may not be covered by the first pressure sensor 510 and may be exposed.

[0156] And, if Figure 5 As shown, due to the gap between the lower frame 600 and the main circuit board 700, the connector connecting portion 315 of the second connection cable 314 passing through the cable hole CAH can pass through the gap between the lower frame 600 and the main circuit board 700 and extend to the lower part of the main circuit board 700. Finally, the connector connecting portion 315 of the second connection cable 314 can be connected to the main connector 730 arranged on the lower side of the main circuit board 700.

[0157] According to Figures 3 to 5 In the illustrated embodiment, a first recessed portion NTH1 in the form of a notch is formed on one side of the first pressure sensor 510 so as not to cover the cable hole CAH of the lower frame 600. Therefore, the second connection cable 314 connected to the display circuit board 310 extends to the lower portion of the lower frame 600 through the cable hole CAH, so as to be connected to the main connection member 730 of the main circuit board 700. Therefore, the display circuit board 310 and the main circuit board 700 can be stably connected.

[0158] Figure 6 It is shown Figure 3 A cross-sectional view of an example of I-I'.

[0159] Reference Figure 6 , the cover window 100 , the touch sensing device 200 , the display panel 300 , the panel lower part 400 , and the lower frame 600 may be formed flat in the first region DR1 , and may be formed as a curved surface in the second region DR2 .

[0160] The first pressure sensor 510 may be arranged in the second region DR2 corresponding to the curved surface portion of the display device 10. A first bump 530 is arranged on the upper portion of the first pressure sensor 510, and each first bump 530 may be attached to the lower portion of the panel lower portion 400 through a fourth adhesive component 940, and may be attached to the upper portion of the first pressure sensor 510 through a sixth adhesive component 960. In addition, the first pressure sensor 510 may be attached to the upper portion of the lower frame 600 through a fifth adhesive component 950. The fourth adhesive component 940, the fifth adhesive component 950, and the sixth adhesive component 960 may be a pressure sensitive adhesive (PSA). One of the fourth adhesive component 940 and the fifth adhesive component 950 may be omitted.

[0161] The waterproof component 610 may be arranged outside the first pressure sensor 510. That is, the waterproof component 610 may be arranged on one side of the first pressure sensor 510, and one side of the first pressure sensor 510 may be arranged closer to one side edge of the display panel 300 than other sides. Figure 6 As shown, in a case where the first pressure sensor 510 is disposed on the right edge of the display panel 300 , the waterproof member 610 may be disposed on the right side surface of the first pressure sensor 510 .

[0162] The waterproof component 610 can be attached to the bottom of the panel lower component 400 and the top of the lower frame 600. To this end, the waterproof component 610 may include a base film, a first adhesive film arranged on one side of the base film, and a second adhesive film arranged on the other side of the base film. The base film may be polyethylene terephthalate (PET), polyethylene terephthalate (PET) and a cushion layer or polyethylene foam (PE-foam). The first adhesive film and the second adhesive film may be pressure sensitive adhesives (PSA). The first adhesive film may be bonded to the bottom of the panel lower component 400, and the second adhesive film may be bonded to the top of the lower frame 600.

[0163] Since the waterproof member 610 is attached by pressurizing the lower surface of the panel lower member 400 and the upper surface of the lower frame 600, in the case where the height of the waterproof member 610 is less than the sum of the height of the first pressure sensor 510 and the height of the first bump 530, the force used to attach the waterproof member 610 may cause damage to the first pressure sensor 510. Therefore, the height of the waterproof member 610 is preferably greater than the sum of the height of the first pressure sensor 510 and the height of the first bump 530. However, in the case where the height of the waterproof member 610 is much greater than the sum of the height of the first pressure sensor 510 and the height of the first bump 530, the pressure may not be sensed by the first pressure sensor 510. Therefore, preferably, the height of the waterproof member 610 should be determined in advance through a preliminary experiment in consideration of the case where the first pressure sensor 510 is damaged by the force used to attach the waterproof member 610 and whether the pressure is sensed by the first pressure sensor 510 after the waterproof member 610 is attached.

[0164] Furthermore, in order for the first bump 530 to pressurize the pressure sensing units CE1 ˜ CE8 of the first pressure sensor 510 according to the pressure of the user, preferably, the height of the first bump 530 should be greater than the height of the first pressure sensor 510 .

[0165] Also, in order to prevent penetration of moisture and dust, the width of the waterproof member 610 is preferably formed to be about 1 mm or more.

[0166] according to Figure 6 In the illustrated embodiment, the waterproof component 610 is arranged outside the first pressure sensor 510 and attached to the lower surface of the panel lower component 400 and the upper surface of the lower frame 600, so that the waterproof component 610 can prevent moisture or dust from penetrating between the display panel 300 and the lower frame 600. That is, a display device 10 capable of being waterproof and dustproof can be provided.

[0167] In addition, since the second pressure sensor 520 is arranged at the left edge of the display panel 300, the only difference between the arrangement positions of the waterproof component 610 and the first pressure sensor 510 and the waterproof component 610 is that the waterproof component 610 is arranged on the left side of the second pressure sensor 520. Therefore, a detailed description of the arrangement positions of the waterproof component 610 and the second pressure sensor 520 is omitted.

[0168] Figure 8 is a perspective view showing a pressure sensor according to an embodiment. Fig. 9 is a plan view showing a pressure sensor according to an embodiment.

[0169] Reference Figure 8 and Fig. 9, the first pressure sensor 510 may include a first substrate SUB1 , driving lines TL, sensing lines RL1 ˜ RL8 , first to eighth pressure sensing units CE1 to CE8 , driving pads TPD, and sensing pads RP1 ˜ RP8 .

[0170] The first substrate SUB1 may include polyethylene, polyimide, poly carbonate, polysulfone, poly acrylate, polystyrene, poly vinyl chloride, poly vinyl alcohol, poly norbornene, polyester, etc. In one embodiment, the first substrate SUB1 may be formed of a polyethylene terephthalate (PET) film or a polyimide film.

[0171] The first substrate SUB1 may have a rectangular planar form including short sides in a first direction (X-axis direction) and long sides in a second direction (Y-axis direction). However, the planar form of the first substrate SUB1 is not limited thereto and may be changed according to an application location.

[0172] In order to prevent the lower frame 600 from covering the cable hole CAH, a first recessed portion NTH1 in the form of a notch may be formed on one side surface of the first substrate SUB1.

[0173] A pad portion PAD to which the pressure sensing circuit board 550 is attached may be formed on the first substrate SUB1. The pad portion PAD may protrude from one side of the first substrate SUB1. Figure 8 and Fig. 9 The pad portion PAD is shown as protruding from a side surface corresponding to a long side of the first substrate SUB1 , but the present invention is not limited thereto.

[0174] The pad portion PAD may include a driving pad TPD connected to the driving line TL and sensing pads RP1 ˜ RP8 connected to the sensing lines RL1 ˜ RL8 . A pressure sensing circuit board 550 may be attached to the driving pad TPD and the sensing pads RP1 ˜ RP8 .

[0175] Pressure sensing units CE1 to CE8 are arranged on the first substrate SUB1. Figure 8 and Fig. 9 A case where the first pressure sensor 510 includes eight pressure sensing units CE1 ˜ CE8 is shown, but the number of the pressure sensing units CE1 ˜ CE8 is not limited thereto.

[0176] The pressure sensing units CE1 to CE8 can sense the pressure at corresponding positions independently. Figure 8 and Fig. 9 The pressure sensing units CE1 to CE8 are arranged in one row, but the arrangement is not limited thereto. The pressure sensing units CE1 to CE8 may be arranged in multiple rows as required. Fig. 9 As shown, they are arranged at predetermined intervals, or they may be arranged continuously.

[0177] The pressure sensing units CE1 to CE8 may have different areas depending on the purpose. For example, the first pressure sensing unit CE1 to the seventh pressure sensing unit CE7 may be used as a physical button like a volume control button or a power button arranged on one side edge of the display device 10. Alternatively, the eighth pressure sensing unit CE8 may be used as a button for sensing the squeezing pressure of the user. In this case, the eighth pressure sensing unit CE8 may be formed to have a larger area than the first pressure sensing unit CE1 to the seventh pressure sensing unit CE7. The eighth pressure sensing unit CE8 may be formed longer than the first pressure sensing unit CE1 to the seventh pressure sensing unit CE7 in the length direction (Y-axis direction) of the first pressure sensor 510.

[0178] And, although Figure 8 and Fig. 9 The case where the first to seventh pressure sensing cells CE1 to CE7 used as physical keys are formed to have the same area is shown, but it is not limited thereto. That is, the areas of the first to seventh pressure sensing cells CE1 to CE7 may be different from each other. Alternatively, the areas of some of the pressure sensing cells CE1 to CE7 may be the same as each other, and the areas of the remaining pressure sensing cells may be the same as each other, but the areas of each of the some of the pressure sensing cells and the areas of each of the remaining pressure sensing cells may be different from each other.

[0179] Each of the pressure sensing units CE1-CE8 may include a driving electrode TE and a sensing electrode RE arranged on one side of the first substrate SUB1 and a pressure sensing layer PSL arranged between the first substrate SUB1 and the driving electrode TE and the sensing electrode RE. The driving electrodes TE and the sensing electrodes RE may be arranged alternately. One of the driving electrodes TE may be connected to the driving line TL, and one of the sensing electrodes RE may be connected to one of the sensing lines RL1-RL8. The pressure sensing layer PSL may overlap the driving electrode TE and the sensing electrode RE.

[0180] First, a pressure sensing layer PSL may be arranged on one surface of the first substrate SUB1. Driving lines TL, sensing lines RL1-RL8, driving pads TPD, and sensing pads RP1-RP8 are arranged on the pressure sensing layer PSL. The driving lines TL are commonly connected to the pressure sensing units CE1-CE8, whereas the sensing lines RL1-RL8 may be connected one-to-one with the pressure sensing units CE1-CE8. The driving pads TPD may be connected to the driving lines TL, and the sensing pads RP1-RP8 may be connected one-to-one with the sensing lines RL1-RL8. Although Figure 8 and Fig. 9 4 shows a case where the first pressure sensor 510 includes eight sensing lines RL1 ˜ RL8 , but the number of the sensing lines RL1 ˜ RL8 is not limited thereto.

[0181] In addition, the second pressure sensor 520 is different from the first pressure sensor 520 only in that the second pressure sensor 520 does not include the first recessed portion NTH1. Figure 8 and Fig. 9 The first pressure sensor 510 shown is different, so a detailed description of the second pressure sensor 520 is omitted.

[0182] Fig.10 It is shown Fig. 9 An enlarged plan view of an example of region A, Fig.11 It is shown Fig.10 An enlarged plan view of an example of the A-1 region, Fig.12 It is shown Fig.11 A cross-sectional view of an example of II-II', Fig.13 is a cross-sectional view of a pressure sensor according to an embodiment when pressure is applied. Fig.12 A cross-sectional view of the pressure sensor is shown in a situation where no pressure is applied.

[0183] Fig.10 For the sake of convenience, only the fourth pressure sensing unit CE4, the fifth pressure sensing unit CE5, the driving line TL, the first sensing lines RL1 to the eighth sensing lines RL8 connected to the first pressure sensing unit CE1 to the eighth pressure sensing unit CE8, the driving pad TPD and the sensing pads RP1 to RP8 are shown. Fig.10 FIG. 5 shows a pressure sensing circuit board 550 attached to the driving pad TPD and the sensing pads RP1 ˜ RP8 .

[0184] Reference Figures 10 to 12 , each pressure sensing unit CE1-CE8 can be connected to at least one driving line and at least one sensing line. For example, compared to the pressure sensing units CE1-CE8 being connected to one driving line TL, the pressure sensing units CE1-CE8 and the sensing lines RL1-RL8 can be connected one-to-one. Fig.10, the fourth pressure sensing unit CE4 is connected to the driving line TL and the fourth sensing line RL4, and the fifth pressure sensing unit CE5 can be connected to the driving line TL and the fifth sensing line RL5. In addition, the driving line TL can be connected to the driving pad TPD, and the sensing lines RL1-RL8 can be connected to the sensing pads RP1-RP8 one-to-one.

[0185] A driving pad TPD and sensing pads RP1 to RP8 may be arranged on the pad portion PAD. The driving pad TPD may be connected to the driving lead TLR of the pressure sensing circuit board 550, and the sensing pads RP1 to RP8 may be connected one-to-one to the sensing leads RLR1 to RLR8 of the pressure sensing circuit board 550. Since the pressure sensing circuit board 550 is connected to the display circuit board 310, the first pressure sensor 510 may be electrically connected to the pressure sensing unit 330 mounted on the display circuit board 310. Therefore, the pressure sensing unit 330 may apply a driving voltage to the driving line TL through the driving lead TLR of the pressure sensing circuit board 550 and the driving pad TPD of the first pressure sensor 510. Furthermore, a current value or a voltage value is sensed from the sensing line RL1 to RL8 through the sensing leads RLR1 to RLR8 connected to the sensing pads RP1 to RP8 of the first pressure sensor 510, so that the pressure applied to the pressure sensing units CE1 to CE8 may be sensed.

[0186] like Fig.11 As shown, each of the pressure sensing units CE1-CE8 includes a driving connection electrode TCE, a sensing connection electrode RCE, a driving electrode TE, a sensing electrode RE and a pressure sensing layer PSL.

[0187] The driving connection electrodes TCE, the sensing connection electrodes RCE, the driving electrodes TE, and the sensing electrodes RE are arranged on one surface of the first substrate SUB1.

[0188] The driving connection electrode TCE is connected to the driving line TL and the driving electrode TE. Specifically, the driving connection electrode TCE is connected to the driving line TL at one end along the length direction (Y axis direction). The driving electrode TE may be branched along the width direction (X axis direction) of the driving connection electrode TCE.

[0189] The sensing connection electrode RCE is connected to one of the sensing lines RL1 to RL8 and the sensing electrode RE. Specifically, the sensing connection electrode RCE is connected to one of the sensing lines RL1 to RL8 at one end along the length direction (Y-axis direction). The sensing electrode RE may branch along the width direction (X-axis direction) of the sensing connection electrode RCE.

[0190] The driving electrode TE and the sensing electrode RE are arranged adjacent to each other, but are not connected to each other. The driving electrode TE and the sensing electrode RE may be arranged side by side with each other. The driving electrode TE and the sensing electrode RE may be arranged alternately along the length direction (Y-axis direction) of the driving connection electrode TCE and the sensing connection electrode RCE. That is, the driving electrode TE, the sensing electrode RE, the driving electrode TE, the sensing electrode RE may be repeatedly arranged in the order of the driving electrode TE, the sensing electrode RE, the driving electrode TE, and the sensing electrode RE along the length direction (Y-axis direction) of the driving connection electrode TCE and the sensing connection electrode RCE.

[0191] The driving lines TL, the sensing lines RL1 to RL8, the driving connection electrodes TCE, the sensing connection electrodes TCE, the driving electrodes TE, and the sensing electrodes RE may be arranged in the same layer. The driving lines TL, the sensing lines RL1 to RL8, the driving connection electrodes TCE, the sensing connection electrodes RCE, the driving electrodes TE, and the sensing electrodes RE may be formed of the same material. For example, the driving lines TL, the sensing lines RL1 to RL8, the driving connection electrodes TCE, the sensing connection electrodes RCE, the driving electrodes TE, and the sensing electrodes RE may include conductive materials such as silver (Ag), copper (Cu), and the like. The driving lines TL, the sensing lines RL1 to RL8, the driving connection electrodes TCE, the sensing connection electrodes RCE, the driving electrodes TE, and the sensing electrodes RE may be formed on the first substrate SUB1 and the pressure sensing layer PSL by screen printing.

[0192] The pressure sensing layer PSL is disposed on one side of the first substrate SUB1. The pressure sensing layer PSL may be disposed in a manner of overlapping the driving electrodes TE and the sensing electrodes RE. The pressure sensing layer PSL may be directly disposed on one side of the first substrate SUB1.

[0193] The pressure sensing layer PSL may include a polymer having a pressure sensitive material. The pressure sensitive material may be metal particles (or metal nanoparticles) such as nickel, aluminum, titanium, tin, and copper. For example, the pressure sensing layer PSL may be a quantum tunneling composite material (QTC).

[0194] Reference Fig.12 , when no pressure is applied in the height direction (Z-axis direction) of the first pressure sensor 510, the driving electrode TE and the sensing electrode RE may be directly arranged on the pressure sensing layer PSL, respectively. The driving electrode TE and the sensing electrode RE may be in direct contact with the pressure sensing layer PSL. Hereinafter, the contact area of ​​the driving electrode TE and the sensing electrode RE and the pressure sensing layer PSL when no pressure is applied to the first pressure sensor 510 is referred to as the first contact area CRa.

[0195] The pressure sensing layer PSL may include surface unevenness. The surface unevenness may include a convex portion protruding from the surface in the thickness direction and a concave portion concave from the surface in the thickness direction. In other words, the pressure sensing layer PSL may include a first portion PSLa and a second portion PSLb. The first portion PSLa of the pressure sensing layer PSL may be directly arranged on one side of the first substrate SUB1. The first portion PSLa of the pressure sensing layer PSL may have a shape having a substantially flat surface. The second portion PSLb of the pressure sensing layer PSL may protrude from the first portion PSLa of the pressure sensing layer PSL in the thickness direction (lower direction). There may be multiple second portions PSLb of the pressure sensing layer PSL. The portion where the multiple second portions PSLb of the pressure sensing layer PSL and the first portion PSLa of the pressure sensing layer PSL are overlapped may be the convex portion of the pressure sensing layer PSL, and the portion where the second portion PSLb of the pressure sensing layer PSL is not arranged but only the first portion PSLa of the pressure sensing layer PSL is arranged may be the concave portion of the pressure sensing layer PSL.

[0196] The first portion PSLa of the pressure sensing layer PSL may be arranged at a distance from the driving electrode TE and the sensing electrode RE corresponding to the thickness of the second portion PSLb of the pressure sensing layer PSL. Fig.12 As shown, the first portion PSLa of the pressure sensing layer PSL and the driving electrode TE and the sensing electrode RE may be spaced apart from each other with a predetermined gap GAP therebetween.

[0197] The cross-sectional shape of the second portion PSLb of the pressure sensing layer PSL may be a semicircular or semi-elliptical shape.

[0198] like Fig.13 As shown in FIG. 5 , when pressure is applied to the first pressure sensor 510 in the thickness direction, the second portion PSLb of the pressure sensing layer PSL is flattened, and the contact area between the second portion PSLb of the pressure sensing layer PSL and the driving electrode TE and the second portion PSLb of the pressure sensing layer PSL and the sensing electrode RE may increase. Hereinafter, the sum of the contact areas between the second portion PSLb of the pressure sensing layer PSL and the driving electrode TE and the second portion PSLb of the pressure sensing layer PSL and the sensing electrode RE when pressure is applied to the first pressure sensor 510 is referred to as a second contact area CRb.

[0199] The greater the difference between the first contact area CRa when no pressure is applied and the second contact area CRb when pressure is applied, the greater the acceptable change in the resistance value of the sensing line. A large acceptable change in the resistance value of the sensing line can indicate a large acceptable pressure change.

[0200] In the case where the pressure sensing layer PSL and the driving electrode TE and the sensing electrode RE are arranged on different substrates from each other, there is a gap between the pressure sensing layer PSL and the driving electrode TE and between the pressure sensing layer PSL and the sensing electrode RE. That is, in the case where pressure is not applied to the substrate on which the pressure sensing layer PSL is arranged or the substrate on which the driving electrode TE and the sensing electrode RE are arranged, the pressure sensing layer PSL is separated from the driving electrode TE and the sensing electrode RE.

[0201] Since the pressure sensing layer PSL and the driving electrodes TE and the sensing electrodes RE are arranged on different substrates, the process steps may become more complicated (for example, more process masks are required, etc.), and the pressure sensing layer PSL and the driving electrodes TE and the sensing electrodes RE are arranged on different substrates, so the overall thickness of the first pressure sensor 510 may increase. In addition, as described above, since there are gaps between the pressure sensing layer PSL and the driving electrodes TE and between the pressure sensing layer PSL and the sensing electrodes RE, when the display device 10 is bent or folded, the reliability may be reduced and the sensitivity of the first pressure sensor 510 may be reduced.

[0202] However, in the first pressure sensor 510 of the display device 10 according to an embodiment, the driving electrode TE and the sensing electrode RE are directly arranged on the pressure sensing layer PSL to implement a single-layer (1layer) first pressure sensor 510, thereby not only reducing the overall thickness of the first pressure sensor 510, but also simplifying the process steps. Further, in the case where no pressure is applied as described above, since there is no gap between the pressure sensing layer PSL and the driving electrode TE and between the pressure sensing layer PSL and the sensing electrode RE, when bending or folding, the reduction in reliability and the reduction in sensitivity of the first pressure sensor 510 can be prevented in advance.

[0203] Further, when the driving electrode TE and the sensing electrode RE are directly arranged on the pressure sensing layer PSL, if the pressure sensing layer PSL has a flat shape, the difference between the contact areas CRa and CRb based on the situation where pressure is applied to the first pressure sensor 510 and the situation where no pressure is applied may not occur.

[0204] However, the first pressure sensor 510 according to an embodiment includes surface irregularities protruding toward the driving electrode TE and the sensing electrode RE, thereby increasing the difference between the contact areas CRa and CRb based on the case where pressure is applied to the first pressure sensor 510 and the case where no pressure is applied. Therefore, the pressure variation that can be accepted by the first pressure sensor 510 having a single-layer structure can be increased.

[0205] In the following embodiments, the same reference numerals are used to refer to the same components as those in the embodiments already described, and the description thereof is omitted or simplified.

[0206] Fig.14 is a cross-sectional view of a pressure sensor according to another embodiment, Fig.15 is a cross-sectional view of a pressure sensor according to yet another embodiment, Fig.16 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0207] Reference Figures 14 to 16 , according to the first pressure sensor of these embodiments, Fig.12 The cross-sectional shape of the second portion PSLb of the pressure sensing layer PSL may be variously deformed.

[0208] Reference Fig.14 , the cross-sectional shape of the second portion PSLb_1 of the pressure sensing layer PSL_1 may be a triangle, referring to Fig.15 The cross-sectional shape of the second portion PSLb_2 of the pressure sensing layer PSL_2 may be a trapezoid, referring to Fig.16 , the cross-sectional shape of the second portion PSLb_3 of the pressure sensing layer PSL_3 may be a rectangle.

[0209] In addition, the above description has been Fig.12 However, the repeated description will be omitted below.

[0210] Fig.17 is a cross-sectional view showing a pressure sensor according to still another embodiment.

[0211] Reference Fig.17 According to the first pressure sensor of this embodiment and according to Fig.12 The first pressure sensor is different from the first pressure sensor in that the second portion PSLb_4 of the pressure sensing layer PSL_4 is only arranged in the region where the driving electrodes TE and the sensing electrodes RE are arranged and may not be arranged in the region where the driving electrodes TE and the sensing electrodes RE are not arranged.

[0212] In addition, the above description has been Fig.12 However, the repeated description will be omitted below.

[0213] Fig.18 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0214] Reference Fig.18 , and according to Fig.12 The first pressure sensor 510 is different in that the surface of the pressure sensing layer PSL_5 may include a concave pattern IDP that is concave from the surface of the pressure sensing layer PSL_5 toward the first substrate SUB1.

[0215] More specifically, the portion where the recessed pattern IDP of the pressure sensing layer PSL_5 is disposed may constitute a recessed portion of the pressure sensing layer PSL_5, and the portion where the recessed pattern IDP of the pressure sensing layer PSL_5 is not disposed may constitute a convex portion of the pressure sensing layer PSL_5. The recessed portion may be recessed toward the first substrate SUB1 compared to the convex portion.

[0216] The concave pattern IDP of the pressure sensing layer PSL_5 may be disposed only in a region where the driving electrode TE and the sensing electrode RE are disposed, and may not be disposed in a region where the driving electrode TE and the sensing electrode RE are not disposed.

[0217] like Fig.18 As shown, the cross-sectional shape of the concave pattern IDP may have a rectangular or square shape.

[0218] Fig.19 is a cross-sectional view of a pressure sensor according to yet another embodiment, Fig. 20 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0219] Reference Fig.19 and Fig. 20 , which means Fig.18 The cross-sectional shape of the concave pattern IDP of the pressure sensing layer PSL_5 of the first pressure sensor may be variously modified.

[0220] Reference Fig.19 The cross-sectional shape of the concave pattern IDP_1 of the pressure sensing layer PSL_6 may be a trapezoidal shape whose width increases as it approaches the first substrate SUB1. Fig. 20 , the cross-sectional shape of the concave pattern IDP_2 of the pressure sensing layer PSL_7 may be an ellipse or a semicircle shape.

[0221] Fig.21 is an enlarged plan view of a pressure sensor according to yet another embodiment, Fig. 22 is along Fig.21 A cross-sectional view taken along line XXII-XXII'.

[0222] Reference Fig.21 and Fig. 22 The cross-sectional shapes of the driving electrode TE_1 and the sensing electrode RE_1 of the first pressure sensor according to this embodiment are similar to those according to Fig.12 The driving electrode TE and the sensing electrode RE have different cross-sectional shapes.

[0223] More specifically, the cross-sectional shapes of the driving electrode TE_1 and the sensing electrode RE_1 according to the present embodiment include surface unevenness, respectively, and the pressure sensing layer PSL_8 does not include surface unevenness and may have a substantially flat cross-sectional shape. The driving electrode TE_1 may include a first portion TE_1a and a second portion TE_1b connected to the first portion TE_1a, protruding toward the pressure sensing layer PSL_8, and in contact with the pressure sensing layer PSL_8, and the sensing electrode RE_1 may include a first portion RE_1a and a second portion RE_1b connected to the first portion RE_1a, protruding toward the pressure sensing layer PSL_8, and in contact with the pressure sensing layer PSL_8. The first portion TE_1a may be a first driving electrode portion, the second portion TE_1b may be a second driving electrode portion, and the first portion RE_1a may be a first sensing electrode portion, and the second portion RE_1b may be a second sensing electrode portion.

[0224] The portion where the first portion TE_1a, RE_1a of the driving electrode TE_1 and the sensing electrode RE_1 overlap with the second portion TE_1b, RE_1b may be a convex portion of the surface of the driving electrode TE_1 and the sensing electrode RE_1, and the portion where the first portion TE_1a, RE_1a of the driving electrode TE_1 and the sensing electrode RE_1 and the second portion TE_1b, RE_1b are arranged without overlapping and where only the first portion TE_1a, RE_1a is arranged may be a concave portion of the surface of the driving electrode TE_1 and the sensing electrode RE_1.

[0225] In addition, the above description has been Fig.12 However, the repeated description will be omitted below.

[0226] Fig.23 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0227] Reference Fig.23 , and according to Fig. 22 The difference between the first pressure sensor of the embodiment is that the first pressure sensor according to the present embodiment is arranged with Fig.12 The pressure sensing layer PSL is not arranged with Fig. 22 The pressure sensing layer PSL_8.

[0228] In addition, the above description has been Fig.12 as well as Fig. 22 However, the repeated description will be omitted below.

[0229] Fig.24 is an enlarged plan view of a pressure sensor according to yet another embodiment, Fig.25 is along Fig.24 Cross-sectional view taken along line XXV-XXV'.

[0230] Reference Fig.24 and Fig.25 According to the first pressure sensor of this embodiment and according to Fig. 22 The first pressure sensor is different in that the driving electrode TE_2 and the sensing electrode RE_2 each include a recessed pattern IDP_3 recessed in a direction opposite to the direction toward the first substrate SUB1 .

[0231] More specifically, the driving electrode TE_2 and the sensing electrode RE_2 may each include a recessed pattern IDP_3 recessed from a surface (or a surface) contacting the pressure sensing layer PSL_8 in a direction opposite to a direction toward the first substrate SUB1 .

[0232] The cross-sectional shape of the recessed pattern IPD_3 may be as follows: Fig.25 The shape shown is a quadrilateral, but it is not limited thereto, and other shapes such as a triangle, a circle, an ellipse, etc. may be used.

[0233] In addition, the above description has been Fig.12 as well as Fig. 22 The above has been done, and repeated description will be omitted below.

[0234] Fig.26 is a cross-sectional view showing a pressure sensor according to still another embodiment.

[0235] Reference Fig.26 According to the first pressure sensor of this embodiment and according to Fig.25 The first pressure sensor is different in that Fig.25 In the first pressure sensor, the pressure sensing layer PSL_8 uses the Fig.12 The pressure sensing layer PSL.

[0236] In addition, the above description has been Fig.12 as well as Fig.25 The above has been done, and repeated description will be omitted below.

[0237] Fig. 27 is an enlarged plan view of a pressure sensor according to yet another embodiment, Fig.28 is based on Fig. 27 A cross-sectional view taken along line XXVIII-XXVIII'.

[0238] Reference Fig. 27 and Fig.28 , and according to Fig.11 and Fig.12 The first pressure sensor is different in that Fig.11 One driving electrode TE and one sensing electrode RE are respectively composed of a plurality of linear patterns.

[0239] More specifically, Fig.11A driving electrode TE and a sensing electrode RE may include a plurality of linear patterns respectively. Although the driving electrode TE_3 and the sensing electrode RE_3 are shown as having three linear patterns in the figure, they are not limited thereto and may be two or more than four linear patterns.

[0240] In addition, the above description has been Fig.11 as well as Fig.12 However, the repeated description will be omitted below.

[0241] Fig.29 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0242] Reference Fig.29 According to the first pressure sensor of this embodiment and according to Fig.28 The first pressure sensor is different in that it is arranged with Fig.12 The pressure sensing layer PSL is not arranged with Fig.28 The pressure sensing layer PSL_8.

[0243] In addition, the above description has been Fig.12 as well as Fig.28 However, the repeated description will be omitted below.

[0244] Fig.30 is a cross-sectional view of a pressure sensor according to yet another embodiment.

[0245] Reference Fig.30 , and according to Fig.12 The first pressure sensor is different in that the driving electrodes TE and the sensing electrodes RE are arranged on a surface of the second substrate SUB2 facing the first substrate SUB1 instead of being arranged on the first substrate SUB1.

[0246] More specifically, the second substrate SUB2 may be opposite to the first substrate SUB1. The material of the second substrate SUB2 may be substantially the same as the material of the first substrate SUB1.

[0247] The driving electrodes TE and the sensing electrodes RE may be disposed on a surface of the second substrate SUB2 facing the first substrate SUB1. Therefore, before the first pressure sensor is subjected to pressure, the driving electrodes TE and the sensing electrodes RE may be disposed apart from the pressure sensing layer PSL via a gap GAP.

[0248] The embodiments of the present invention are described above with reference to the accompanying drawings, but it is understood by those with ordinary knowledge in the technical field to which the present invention belongs that the present invention can be implemented in other specific forms without changing the technical ideas or essential features of the present invention. Therefore, the embodiments described above should be understood to be exemplary in all aspects, rather than restrictive.

Claims

1. A pressure sensor, comprising: a first substrate; A pressure sensing layer, arranged on one surface of the first substrate; as well as The driving electrodes and the sensing electrodes are arranged on the pressure sensing layer and are spaced apart from each other. The driving electrodes and the sensing electrodes are arranged on the same layer. The driving electrode and the sensing electrode are both directly arranged on the pressure sensing layer, Wherein, the pressure sensing layer comprises: a first portion disposed on the one side of the first substrate; and a plurality of second portions protruding from the first portion toward the sensing electrode and the driving electrode, The driving electrode comprises: a first driving electrode portion; and a second driving electrode portion protruding from the first driving electrode portion toward the pressure sensing layer, The sensing electrode comprises: a first sensing electrode portion; and a second sensing electrode portion protruding from the first sensing electrode portion toward the pressure sensing layer, The second driving electrode portion is in direct contact with the plurality of second portions of the pressure sensing layer, and the second sensing electrode portion is in direct contact with the plurality of second portions of the pressure sensing layer.

2. The pressure sensor according to claim 1, wherein: The first portion is spaced apart from the driving electrode and the sensing electrode by a spacing space.

3. The pressure sensor according to claim 2, wherein: A first contact area between the second portion and the driving electrode and the sensing electrode before pressure is applied to the pressure sensor is smaller than a second contact area between the second portion and the driving electrode and the sensing electrode after pressure is applied to the pressure sensor.

4. The pressure sensor according to claim 1, wherein: The cross-sectional shape of the second portion includes a semicircle, a semi-ellipse, a triangle or a quadrilateral.

5. The pressure sensor according to claim 1, wherein: The driving electrode and the sensing electrode each include a concave pattern that is concave in a direction opposite to a direction facing the pressure sensing layer.

6. The pressure sensor according to claim 1, wherein: The driving electrodes and the sensing electrodes both extend along a first direction, There are a plurality of driving electrodes and a plurality of sensing electrodes. On a plane, the plurality of driving electrodes and the plurality of sensing electrodes are alternately arranged along a second direction intersecting the first direction, Each of the driving electrode and the sensing electrode includes a plurality of patterns.

7. A pressure sensor, comprising: a first substrate; A pressure sensing layer, arranged on one surface of the first substrate; as well as The driving electrodes and the sensing electrodes are arranged on the pressure sensing layer and are spaced apart from each other. The driving electrodes and the sensing electrodes are arranged on the same layer. The driving electrode and the sensing electrode are both directly arranged on the pressure sensing layer, The pressure sensing layer comprises: a first portion disposed on the one side of the first substrate; and a plurality of second portions, recessed from the first portion toward the first substrate, The plurality of second portions are arranged to overlap the driving electrode and the sensing electrode in the thickness direction of the pressure sensing layer, and are arranged not to overlap the space between the driving electrode and the sensing electrode. The cross-sectional shape of the plurality of second portions is a trapezoid.

8. The pressure sensor according to claim 7, wherein: A first contact area between the second portion and the driving electrode and the sensing electrode before pressure is applied to the pressure sensor is smaller than a second contact area between the second portion and the driving electrode and the sensing electrode after pressure is applied to the pressure sensor.

9. A pressure sensor comprising: a first substrate; a second substrate, facing the first substrate; a pressure sensing layer, arranged on a surface of the first substrate facing the second substrate; as well as The driving electrodes and the sensing electrodes are arranged on a surface of the second substrate facing the first substrate and are spaced apart from each other. The driving electrodes and the sensing electrodes are arranged on the same layer. The pressure sensing layer includes a concavo-convex structure on a surface facing the driving electrode and the sensing electrode. Wherein, the pressure sensing layer comprises: a first portion disposed on the one side of the first substrate; and a plurality of second portions protruding from the first portion toward the sensing electrode and the driving electrode, The driving electrode comprises: a first driving electrode portion; and a second driving electrode portion protruding from the first driving electrode portion toward the pressure sensing layer, The sensing electrode comprises: a first sensing electrode portion; and a second sensing electrode portion protruding from the first sensing electrode portion toward the pressure sensing layer, The second driving electrode portion is in direct contact with the plurality of second portions of the pressure sensing layer, and the second sensing electrode portion is in direct contact with the plurality of second portions of the pressure sensing layer.

10. A display device comprising: display panel; and A pressure sensor is arranged at the lower part of the display panel, in, The pressure sensor is the pressure sensor according to any one of claims 1 to 9.

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