Repulsive force measuring device and repulsive force measuring method

Abstract

A repulsive force measuring device and a repulsive force measuring method are disclosed. According to an embodiment, the repulsive force measuring device includes a base, a support connected to the base, a clamp part placed on the support and including a first clamp, a second clamp, and a hinge, wherein the first clamp is detachably coupled to the support, the second clamp is separated from the first clamp, and the hinge connects the first clamp and the second clamp, a rotating part connected to the base to be rotatable with a first rotation axis as a reference, and a measuring part connected to the rotating part and moved by the rotating part to press the second clamp.

Description

Technical Field

[0001] This invention relates to a repulsion force measuring device and a repulsion force measuring method. Background Technology

[0002] With the development of multimedia technology, the importance of display devices is increasing. Therefore, various display devices such as liquid crystal displays (LCDs) and organic light-emitting diode displays (OLEDs) are being used.

[0003] Meanwhile, mobile electronic devices include display devices to provide images to users. The proportion of portable electronic devices with larger display screens while having the same or smaller size and thickness as before is increasing, and foldable or flexible display devices with structures that can be folded and unfolded to provide a larger screen only when in use are also being developed. In the aforementioned foldable or flexible display devices, flexible display panels or flexible display modules that are flexible can be used.

[0004] The repulsive forces of flexible display panels or modules can affect the design and use of display devices in various ways, such as in pre-stop hinge designs that take into account torque during folding or unfolding operations. Therefore, it is necessary to measure the repulsive forces of flexible display panels or modules. Summary of the Invention

[0005] Technical problems to be solved

[0006] The problem this invention aims to solve is to provide a repulsion measuring device and a repulsion measuring method capable of measuring the repulsion force of a flexible display module and a foldable display device including the flexible display module.

[0007] The problems of this invention are not limited to those described above, and those skilled in the art will clearly understand other problems not mentioned from the following description.

[0008] Solution

[0009] A repulsive force measuring device according to one embodiment for solving the above-mentioned problems includes: a base; a support portion connected to the base; a clamp portion placed on the support portion and including a first clamp, a second clamp separate from the first clamp, and a hinge connecting the first clamp and the second clamp; a rotating portion connected to the base to be rotatable about a first rotation axis; a measuring portion connected to the rotating portion and moved by the rotating portion to apply pressure to the second clamp; and a position adjusting portion connected to the rotating portion and the measuring portion, and adjusting the position of the measuring portion to change the first point at which the measuring portion applies pressure to the second clamp.

[0010] The first clamp can be detachably attached to the support.

[0011] The position adjustment unit can adjust the position of the measuring unit, thereby changing the distance between the hinge and the first point.

[0012] The measuring unit can perform circular motion with the first rotation axis as a reference, and the position adjustment unit can adjust the position of the measuring unit, thereby changing the radius of the circular motion of the measuring unit.

[0013] The position adjustment unit may include a fixed member fixed to the rotating unit and a sliding member slidably coupled to the fixed member, and the measuring unit may be fixed to the sliding member.

[0014] The sliding member can slide in one direction that intersects the radial direction of the circular motion and in another direction that is opposite to the radial direction.

[0015] When the sliding member moves in one direction, the distance between the hinge and the first point can decrease, and when the sliding member moves in the opposite direction, the distance between the hinge and the first point can increase.

[0016] The fixing member may include a first plate and a guide protrusion, wherein the first plate is connected to the rotating part and the guide protrusion protrudes from the first plate, and the sliding member may include a second plate and a guide slit, wherein the second plate at least partially overlaps with the first plate, and the guide slit is formed through the second plate and the guide protrusion is inserted into the guide slit.

[0017] The first plate may include markers for adjusting the position of the measuring unit relative to the first plate.

[0018] The first fixture and the second fixture may each include one surface on which the test object is to be placed and another surface opposite to the first surface, and the measuring unit may apply pressure to the other surface of the second fixture.

[0019] When the second clamp is pressed, the second clamp can rotate so that the angle between one surface of the first clamp and one surface of the second clamp decreases. The test object can be folded by the rotation of the second clamp, and the measuring unit can measure the repulsive force of the test object when the test object is folded.

[0020] The test object may include a flexible display panel.

[0021] The measuring unit can perform circular motion with the first rotation axis as a reference to apply pressure to the second clamp.

[0022] The support portion may include a magnet, and the first clamp may include a magnetic component magnetically coupled to the magnet.

[0023] The clamping part can be placed on the support part, so that the hinge is arranged on the first rotating axis.

[0024] The measuring section may include a main body, a pressure-applying member protruding from the main body, and a cover member covering the end of the pressure-applying member.

[0025] To solve the above problems, a repulsive force measurement method according to one embodiment includes: placing a clamp portion with a test object attached on a support portion using a first clamp and a second clamp connected to the first clamp via a hinge; and applying pressure to the opposite surface of the second clamp with the test object attached using a measuring portion that performs circular motion with reference to a first rotation axis, causing the test object to be folded, and measuring the repulsive force of the test object.

[0026] The step of placing the clamp portion onto the support portion may include: magnetically attaching the first clamp to the support portion.

[0027] The repulsion measurement method may further include the step of adjusting the pressure point on the opposite surface of the second fixture by adjusting the position of the measuring unit.

[0028] The test object can be a foldable display device that includes a flexible display panel.

[0029] Specific details of other embodiments are included in the detailed description and accompanying drawings.

[0030] Beneficial effects

[0031] According to one embodiment, the repulsion measuring device and repulsion measuring method can easily measure the repulsion of flexible display modules and foldable display devices including flexible display modules.

[0032] The effects of the embodiments are not limited to those described above, but rather include a variety of effects as described in this specification. Attached Figure Description

[0033] Figure 1 This is a perspective view of a display device related to a repulsion measuring device according to an embodiment.

[0034] Figure 2 yes Figure 1 A perspective view of the display device in its inward-folded state.

[0035] Figure 3 yes Figure 1 A perspective view of the display device in its outward-folded state.

[0036] Figure 4 yes Figure 1 An exploded perspective view of the display device.

[0037] Figure 5 yes Figure 1 A cross-sectional view of the display module.

[0038] Figure 6 yes Figure 5 A cross-sectional view of the display panel.

[0039] Figure 7 This is a perspective view of a repulsion measuring device according to an embodiment.

[0040] Figure 8 This is a perspective view of a repulsion measuring device according to one embodiment, in which the clamping part is folded.

[0041] Figure 9 This is a plan view of the clamp and support portions of a repulsion measuring device according to an embodiment, in a state where they are separated from each other.

[0042] Figure 10 This is a plan view of the clamp and support portions of a repulsion measuring device according to an embodiment, in a state of being joined together.

[0043] Figure 11 This is a plan view of a repulsive force measuring device according to one embodiment, in the state before the rotating part rotates.

[0044] Figure 12 This is a plan view of a repulsive force measuring device according to an embodiment, wherein the rotating part is rotating in a first rotation direction.

[0045] Figure 13 This is a plan view of a repulsive force measuring device according to an embodiment when the measuring part is in the first position.

[0046] Figure 14 This is a plan view of a repulsive force measuring device according to an embodiment when the measuring part is in the second position.

[0047] Figure 15 This is a flowchart of a repulsion force measurement method according to one embodiment.

[0048] Figure 16 This is a perspective view showing the clamping part placed on the support part.

[0049] Figure 17 This is a perspective view showing the position of the measuring unit adjusted by the position adjustment unit.

[0050] Figure 18 It is a perspective view showing the measuring part rotating through the rotating part and measuring the repulsive force of the test object.

[0051] Explanation of reference numerals in the attached figures

[0052] 1: Display device

[0053] 10: Repulsion measuring device

[0054] 100: Base

[0055] 200: Support section

[0056] 300: Fixtures Section

[0057] 400: Rotating part

[0058] 500: Measurement Department

[0059] 600: Position Adjustment Unit Detailed Implementation

[0060] The advantages and features of the present invention, as well as the methods for achieving these advantages and features, will become clear from the following detailed description of embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in many different forms. These embodiments are provided merely to complete the disclosure of the invention and to fully inform those skilled in the art of the scope of the invention, and the invention is defined only by the scope of the claims.

[0061] When an element or layer is referred to as being "on" another element or layer, it includes both cases where it is directly on the other element or layer and cases where another element or layer is interposed in between. Throughout this specification, the same reference numerals denote the same elements. The shapes, dimensions, ratios, angles, numbers, etc., shown in the drawings used to illustrate embodiments are exemplary, and the invention is not limited to the details illustrated.

[0062] Although terms like "first," "second," etc., are used to describe various structural elements, it is clear that these structural elements are not limited by these terms. These terms are only used to distinguish one structural element from another. Therefore, within the scope of the rapid concept of this invention, the "first structural element" mentioned below can obviously be a "second structural element."

[0063] Specific embodiments will now be described with reference to the accompanying drawings.

[0064] Figure 1 This is a perspective view of a display device related to a repulsion measuring device according to an embodiment. Figure 2 yes Figure 1 A perspective view of the display device in its inward-folded state. Figure 3 yes Figure 1 A perspective view of the display device in its outward-folded state. Figure 4 yes Figure 1 An exploded perspective view of the display device. Figure 5 yes Figure 1 A cross-sectional view of the display module. Figure 6 yes Figure 5 A cross-sectional view of the display panel.

[0065] The display device 1 according to embodiments of the present invention may include various devices for displaying screens or images. The display device 1 may include, for example, smartphones, mobile phones, tablet PCs, personal digital assistants (PDAs), portable multimedia players (PMPs), televisions, game consoles, watch-type electronic devices, head-mounted displays, personal computer displays, laptop computers, car navigation systems, car dashboards, digital cameras, video cameras, outdoor advertising boards, electronic screens, various medical devices, various examination devices, refrigerators or washing machines, and other household appliances including display units, Internet of Things devices, etc., but is not limited thereto.

[0066] Reference Figure 1 The display device 1 may have a rectangular shape on a plane, but is not limited to this. The display device 1 may have various shapes, such as square, circle or rhombus.

[0067] Display device 1 may include a display surface DS. The display surface DS can provide an image to a user. At least one surface of display device 1 may be the display surface DS. In one embodiment, the display surface DS of display device 1 may be the upper surface of display device 1, but is not limited thereto. In some embodiments, the display surface DS of display device 1 may include the side surface and / or the lower surface of display device 1.

[0068] The display surface DS may include a display area DA and a non-display area NDA. The display area DA displays an image. The display area DA may be arranged across a first non-folded area NFA1, a second non-folded area NFA2, and a folded area FA (described later). The non-display area NDA does not display an image. The non-display area NDA may be arranged around the display area DA. In one embodiment, the display area DA may be arranged in a rectangular shape on the upper surface of the display device 1, and the non-display area NDA may be arranged around the display area DA.

[0069] The display device 1 may include a folding region FA, a first non-folding region NFA1, and a second non-folding region NFA2. The folding region FA is the region that bends or folds according to the folding of the display device 1. The first non-folding region NFA1 and the second non-folding region NFA2 are regions that do not bend or fold even when the display device 1 is folded. In one embodiment, the first non-folding region NFA1, the folding region FA, and the second non-folding region NFA2 may be arranged sequentially in one direction, but are not limited thereto.

[0070] Reference Figures 1 to 3The display device 1 can be a foldable device. The display device 1 can be folded or unfolded. Specifically, the display device 1 can be folded such that a portion overlaps with another portion, or a portion is tilted relative to another portion, or the entire display device 1 can be unfolded flat. A portion of the display device 1 can be arranged in a first non-folding region NFA1, and another portion of the display device 1 can be arranged in a second non-folding region NFA2, but is not limited thereto. A portion of the display device 1 and / or another portion of the display device 1 may include portions arranged in folding regions FA.

[0071] The display device 1 can be completely folded such that the angle between one part of the display device 1 and another part is approximately 0° or 360°, or the display device 1 can be partially folded such that the angle between one part of the display device 1 and another part is approximately greater than 0° and less than 180°, or the display device 1 can be unfolded such that the angle between one part of the display device 1 and another part is approximately 180°.

[0072] The display device 1 can be folded inwards and / or outwards. Inward folding can be as follows: Figure 2 The folding is such that a portion of the display surface DS of the display device 1 is opposite to another portion of the display surface DS. The outward folding can be as follows: Figure 3 The folding is such that a portion of the opposite surface of the display surface DS (e.g., the lower surface of the display device 1) is opposite to another portion of the aforementioned opposite surface of the display surface DS. The aforementioned opposite surface may, for example, be the lower surface of the display device 1. The display device 1 may implement both inward folding and outward folding, or it may implement only one of inward folding and outward folding. Hereinafter, the case of inward folding of the display device 1 will be mainly described, but it is not limited thereto.

[0073] The display device 1 can have a folded state and / or an unfolded state. The folded state can be a state in which the display device 1 is bent so that one part of the display device 1 is tilted relative to another part. The unfolded state can be a state in which the display device 1 is fully unfolded so that one part of the display device 1 is arranged parallel to another part on a plane. The display device 1 can freely switch between the folded state and / or the unfolded state.

[0074] The folding state can include a first folding state and a second folding state. The first folding state can be a bent state of the display device 1. In the first folding state, the angle between one part and another part of the display device 1 can be approximately greater than 0° and less than 180°, or greater than 180° and less than 360°. The second folding state can be a fully folded state of the display device 1. In the second folding state, the angle between one part and another part of the display device 1 can be approximately 0° and / or 360°.

[0075] In the unfolded state, the angle between one part and the other part of the display device 1 can be approximately 180°.

[0076] The display device 1 can be folded or unfolded with respect to a folding axis FX. In one embodiment, the display device 1 can be folded or unfolded with respect to a folding axis FX arranged along another direction intersecting the aforementioned direction, but is not limited thereto.

[0077] Multiple folding axes FX can be arranged. For example, folding axes FX may include a first folding axis FX1 and a second folding axis FX2. The first folding axis FX1 may be a rotation axis of the first support member SM1 based on its rotation, and the second folding axis FX2 may be a rotation axis of the second support member SM2 based on its rotation. Although in Figure 2 Two axes are shown, but the arrangement and number of folded axes FX are not limited to this.

[0078] Reference Figures 1 to 4 The display device 1 includes a display module DM and a folding component FM.

[0079] The display module DM is arranged on the display surface DS of the display device 1. The display module DM may have a rectangular shape in a plane, but is not limited thereto. The display module DM may be arranged to be placed on the folding member FM, which will be described later. The display module DM is flexible. The display module DM can be folded or unfolded by folding or unfolding the folding member FM.

[0080] Reference Figure 5 The display module DM may include a display panel DP, an upper stacking structure LS1, and a lower stacking structure LS2. In one embodiment, the display panel DP may display a screen facing the direction of the upper stacking structure LS1. The display panel DP, the upper stacking structure LS1, and the lower stacking structure LS2 may be folded or unfolded according to the folding or unfolding of the display device 1.

[0081] A display panel (DP) is a panel used to display a screen or image. For example, a display panel (DP) includes not only self-emissive display panels such as organic light-emitting diode (OLED), inorganic light-emitting diode (EL), quantum dot (QED), micro-LED, nano-LED, plasma display panel (PDP), field emission display panel (FED), and cathode ray tube (CRT), but also light-receiving display panels such as liquid crystal display (LCD) and electrophoretic display panel (EPD). In the following description, an organic light-emitting diode (OLED) display panel is used as an example of a display panel (DP), and unless a specific distinction is required, the organic light-emitting diode (OLED) display panel used in the embodiments will simply be referred to as a display panel (DP). However, the embodiments are not limited to organic light-emitting diode (OLED) display panels, and within the scope of the shared technical concept, the display panels listed above, as well as other display panels known in the art, can also be applied.

[0082] The display panel DP may also include a touch component. The touch component can be provided not only as a panel or film separate from and attached to the display panel DP, but also as a touch layer within the display panel DP. The following embodiments illustrate a case where the touch component is provided within and included in the display panel DP, but are not limited thereto.

[0083] Reference Figure 6 The display panel DP may include a substrate SUB, a circuit driving layer DRL formed on the substrate SUB, a light-emitting layer EML formed on the circuit driving layer DRL, an encapsulation layer ENL formed on the light-emitting layer EML, and a touch layer TSL formed on the encapsulation layer EML.

[0084] The substrate SUB can be a flexible substrate comprising a flexible polymer material (such as polyimide). Therefore, the display panel DP can be bent, folded, rolled, or bent. In some embodiments, the substrate SUB may include a plurality of sub-substrates overlapping in the thickness direction, wherein a barrier layer is interposed between the plurality of sub-substrates. In this case, each sub-substrate may be a flexible substrate.

[0085] The circuit driving layer DRL can be disposed on the substrate SUB. The circuit driving layer DRL may include circuitry for driving the light-emitting layer EML of the pixels. The circuit driving layer DRL may include multiple thin-film transistors.

[0086] The light-emitting layer (EML) can be disposed above the circuit driving layer (DRL). The EML may include an organic light-emitting layer. The EML can emit light at various brightness levels according to the driving signal transmitted from the DRL.

[0087] The encapsulation layer ENL can be disposed above the light-emitting layer EML. The encapsulation layer ENL may include an inorganic film or a stacked film including inorganic and organic films.

[0088] The touch layer (TSL) can be disposed above the encapsulation layer (ENL). The touch layer (TSL) is the layer that recognizes touch input and performs the functions of the touch components. The touch layer (TSL) may include multiple sensing areas and sensing electrodes.

[0089] Refer again Figure 5 The upper stacked structure LS1 can be arranged on the display panel DP. The upper stacked structure LS1 may include polarizing members 23, cover windows 22 and cover window protective layers 21 stacked sequentially from the display panel DP upwards.

[0090] The polarizing member 23 polarizes light passing through it. The polarizing member 23 can reduce the reflection of external light. In one embodiment, the polarizing member 23 can be a polarizing film. The polarizing film can include a polarizing layer and a protective substrate sandwiching the polarizing layer from above and below. The polarizing layer can include a polyvinyl alcohol film. The polarizing layer can extend in one direction. The direction of extension of the polarizing layer can be the absorption axis, and the direction perpendicular to the direction of extension can be the transmission axis. The protective substrate can be disposed on one surface and the other surface of the polarizing layer, respectively. The protective substrate can be formed of cellulose resin (such as triacetyl cellulose), polyester resin, etc., but is not limited thereto.

[0091] The cover window 22 can be disposed on the polarizing member 23. The cover window 22 serves to protect the display panel DP. The cover window 22 can be formed of a transparent material. The cover window 22 can be formed of, for example, glass or plastic.

[0092] When the cover window 22 includes glass, the glass can be ultra-thin film glass (UTG) or thin film glass. When the glass is formed from an ultra-thin film or a thin film, the cover window 22 can be flexible and has the property of being able to be bent, folded, or rolled. The thickness of the glass can, for example, range from 10 μm to 300 μm, specifically, a thickness of 30 μm to 80 μm or about 50 μm can be used. The glass of the cover window 22 can include soda lime glass, alkali aluminosilicate glass, borosilicate glass, or lithium aluminosilicate glass. The glass of the cover window 22 can include chemically strengthened glass or thermally strengthened glass to have high strength. Chemical strengthening can be achieved by an ion exchange treatment process in an alkaline salt. The ion exchange treatment process can also be performed more than twice.

[0093] When the cover window 22 is made of plastic, it is more advantageous to present flexible properties such as folding. Examples of plastics suitable for the cover window 22 include, but are not limited to, polyimide, polyacrylate, polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene naphthalate (PEN), polyvinylidene chloride, polyvinylidene fluoride (PVDF), polystyrene, ethylene-vinyl alcohol copolymer, polyethersulfone (PES), polyetherimide (PEI), polyphenylene sulfide (PPS), polyallyl ester, triacetyl cellulose (TAC), cellulose acetate propionate (CAP), etc. The plastic cover window 22 may be formed from one or more of the plastic materials listed above.

[0094] A protective layer 21 can be disposed on the cover window 22. The protective layer 21 can perform at least one of the following functions for the cover window 22: anti-scattering, shock absorption, anti-scratch, anti-fingerprint, and anti-glare. The protective layer 21 can be formed from a transparent polymer film. This transparent polymer film can include at least one of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethersulfone (PES), polyimide (PI), polyarylate (PAR), polycarbonate (PC), polymethyl methacrylate (PMMA), and cyclic olefin copolymer (COC) resin.

[0095] The upper stacked structure LS1 may include upper bonding members 25_1, 25_2, and 25_3 that bond adjacent stacked components. For example, the first bonding member 25_1 may be arranged between the cover window 22 and the cover window protective layer 21 to bond the cover window 22 and the cover window protective layer 21; the second bonding member 25_2 may be arranged between the cover window 22 and the polarizing member 23 to bond the cover window 22 and the polarizing member 23; and the third bonding member 25_3 may be arranged between the polarizing member 23 and the display panel DP to bond the polarizing member 23 and the display panel DP. That is, the upper bonding members 25_1, 25_2, and 25_3 are components that attach layers to a surface of the display panel DP, wherein the first bonding member 25_1 is a protective layer bonding member for attaching the cover window protective layer 21, the second bonding member 25_2 is a window bonding member for attaching the cover window 22, and the third bonding member 25_3 is a polarizing portion bonding member for attaching the polarizing member 23. The upper connecting components 25_1, 25_2 and 25_3 can all be optically transparent.

[0096] The lower stacked structure LS2 is arranged below the display panel DP. The lower stacked structure LS2 may include a polymer film layer 31 and a heat dissipation component 32 stacked sequentially from the display panel DP downwards.

[0097] The polymeric film layer 31 may include a polymeric film. For example, the polymeric film layer 31 may include polyimide (PI), polyethylene terephthalate (PET), polycarbonate (PC), polyethylene (PE), polypropylene (PP), polysulfone (PSF), polymethyl methacrylate (PMMA), triacetyl cellulose (TAC), cyclic olefin polymer (COP), etc. The polymeric film layer 31 may include a functional layer FL on at least one surface. The functional layer FL may include, for example, a light-absorbing layer. The light-absorbing layer may include a light-absorbing material such as a black pigment or dye. The light-absorbing layer can be formed on the polymeric film using black ink by coating or printing.

[0098] The heat dissipation component 32 can be disposed below the polymer film layer 31. The heat dissipation component 32 serves to diffuse heat generated from the display panel DP or other components of the display device 1. The heat dissipation component 32 can also be a heat sink comprising graphite or carbon nanotubes. In one embodiment, such as... Figure 5 As shown, the heat dissipation component 32 can be separated based on the folding area FA to allow the display device 1 to fold smoothly. In some embodiments, the heat dissipation component 32 can also be connected as a single unit.

[0099] The lower stacked structure LS2 may include rear bonding members 35_1 and 35_2 that bond adjacent stacked components. For example, a fourth bonding member 35_1 may be disposed between the display panel DP and the polymer film layer 31 to bond the display panel DP and the polymer film layer 31, and a fifth bonding member 35_2 may be disposed between the polymer film layer 31 and the heat dissipation component 32 to bond the polymer film layer 31 and the heat dissipation component 32.

[0100] In some embodiments, the lower stacked structure LS2 may also include a buffer member. For example, the buffer member may be disposed between the polymer film layer 31 and the heat dissipation member 32.

[0101] Refer again Figures 1 to 4 The folding component FM is positioned below the display module DM. The folding component FM supports the display module DM. The display module DM can be folded or unfolded via the folding component FM.

[0102] The folding member FM includes a first support member SM1, a second support member SM2, and a hinge member HM. The folding member FM may also include a hinge cover HC and a lower cover RC.

[0103] A first support member SM1 and a second support member SM2 are arranged below the display module DM. The first support member SM1 and the second support member SM2 may be sequentially arranged on the lower surface of the display module DM along a second direction DR2. The first support member SM1 and the second support member SM2 may be arranged symmetrically with respect to the folding region FA or the folding axis FX. The first support member SM1 may be arranged in the first non-folding region NFA1, and the second support member SM2 may be arranged in the second non-folding region NFA2. A portion of the first support member SM1 and / or the second support member SM2 may be arranged across the folding region FA. The first support member SM1 and the second support member SM2 may have the same shape and / or dimensions, or they may have different shapes and / or dimensions. In one embodiment, the first support member SM1 and the second support member SM2 may have a generally rectangular shape in a plane, but are not limited thereto.

[0104] Hinge member HM connects first support member SM1 and second support member SM2. Hinge member HM can be arranged to overlap with folding axis FX in the thickness direction. Hinge member HM can be arranged within folding region FA. Hinge member HM can be arranged across first non-folding region NFA1, second non-folding region NFA2, and folding region FA. Multiple hinge members HM can be arranged along folding axis FX. Hinge member HM can provide multiple rotation axes. First support member SM1 and second support member SM2 can be rotatably connected to hinge member HM, respectively.

[0105] The hinge cover HC covers one side of the hinge member HM. The hinge member HM can be mounted and secured to the hinge cover HC. The upper surface of the hinge cover HC may have a recessed shape to accommodate the hinge member HM.

[0106] The lower cover RC may include a first lower cover RC1 and a second lower cover RC2, wherein the first lower cover RC1 covers the lower surface of the first support member SM1, and the second lower cover RC2 covers the lower surface of the second support member SM2. The first lower cover RC1 and the second lower cover RC2 may also further cover at least a portion of the hinge member HM and / or the hinge cover HC.

[0107] Reference Figures 1 to 6 When an external force is applied to the folding display module DM and the display device 1 including the display module DM, the display module DM and the display device 1 including the display module DM can generate a repulsive force to maintain them in a flat, unfolded state (i.e., the unfolded state). This repulsive force can be generated by the components constituting the display module DM (e.g., Figure 5 and Figure 6The force generated by the combination of the upper stacked structure LS1, the lower stacked structure LS2, the display panel DP, and the connecting members 25_1, 25_2, 25_3, 35_1, and 35_2 that combine them, as shown in the diagram. For example, the repulsive force described above can be a restoring force, i.e., a restoring force that, in a flat, unfolded state, returns the stacked upper stacked structure LS1, lower stacked structure LS2, display panel DP, and the connecting members 25_1, 25_2, 25_3, 35_1, and 35_2 of the display module DM to its initial flat state. The repulsive force described above can affect the design of the display device 1 in various ways, such as the durability of the display device 1, the torque during folding or unfolding operations of the display device 1, etc. Therefore, it is necessary to accurately measure the repulsive force.

[0108] In the following text, reference will be made to Figures 7 to 18 A detailed description is provided of a repulsion measuring device and a repulsion measuring method capable of measuring and / or evaluating the repulsion force of a flexible display module and / or a display device including the display module.

[0109] Figure 7 This is a perspective view of a repulsion measuring device according to an embodiment. Figure 8 This is a perspective view of a repulsion measuring device according to one embodiment, in which the clamping part is folded. Figure 9 This is a plan view of the clamp and support portions of a repulsion measuring device according to an embodiment, in a state where they are separated from each other. Figure 10 This is a plan view of the clamp and support portions of a repulsion measuring device according to an embodiment, in a state of being joined together. Figure 11 This is a plan view of a repulsive force measuring device according to one embodiment, in the state before the rotating part rotates. Figure 12 This is a plan view of a repulsive force measuring device according to an embodiment, wherein the rotating part is rotating in a first rotation direction. Figure 13 This is a plan view of a repulsive force measuring device according to an embodiment when the measuring part is in the first position. Figure 14 This is a plan view of a repulsive force measuring device according to an embodiment when the measuring part is in the second position.

[0110] In the following text, the first direction DR1, the second direction DR2, and the third direction DR3 are different from each other and intersect each other. In one embodiment, the first direction DR1, the second direction DR2, and the third direction DR3 may intersect each other perpendicularly, wherein the first direction DR1 may be horizontal, the second direction DR2 may be vertical, and the third direction DR3 may be the thickness direction. The first direction DR1, the second direction DR2, and / or the third direction DR3 may include more than two directions. For example, the third direction DR3 may include an upper direction facing the upper side in the figure and a lower direction facing the lower side in the figure. In this case, one surface of the component facing the upper direction may be referred to as the upper surface, and the other surface of the component facing the lower direction may be referred to as the lower surface. However, the above directions are exemplary and relative, and are not limited to the above cases.

[0111] In one embodiment, the repulsive force measuring device 10 is a device for measuring and / or evaluating the repulsive force when a test object T is folded or bent, and the test object T may include a flexible display module T_DM and a support member T_FM for supporting the display module T_DM. In some embodiments, the display module T_DM and the support member T_FM may be respectively Figures 1 to 6 The display module DM and folding member FM are illustrated in the figure. In some embodiments, the test object T may include various types of foldable, bendable or rollable display devices and flexible members suitable for the display devices (e.g., flexible display panels, flexible display modules, substrates or cover windows, etc.), and the repulsion measuring device 10 may be a device for measuring the repulsion applied to the device and the members suitable for the device.

[0112] Reference Figure 7 and Figure 8 The repulsion measuring device 10 includes a base 100, a support 200, a clamp 300, a rotating part 400, and a measuring part 500. The repulsion measuring device 10 may also include a position adjustment part 600.

[0113] The base 100 provides space for arranging the support portion 200, the clamping portion 300, the rotating portion 400, the measuring portion 500, and the position adjusting portion 600. The support portion 200, the clamping portion 300, the rotating portion 400, the measuring portion 500, and the position adjusting portion 600 can be arranged on one surface of the base 100. One surface of the base 100 can be the upper surface 100_US of the base 100, parallel to the first direction DR1 and the second direction DR2. In one embodiment, the base 100 may have a cuboid shape, but is not limited thereto. In some embodiments, a drive portion connected to one side of the rotating portion 400 (described later) and used to rotate the rotating portion 400 can be mounted within the base 100. In some embodiments, a first input portion 110 and a second input portion 120 may be arranged on the upper surface 100_US of the base 100, wherein the first input portion 110 receives inputs for controlling the torque, rotation angle, number of rotations, etc. of the rotating portion 400 (described later), and the second input portion 120 controls the rotational action of the rotating portion 400. In some embodiments, the base 100 may include a guide groove 100_G, which is recessed from the upper surface 100_US of the base 100 to have an arcuate shape with a predetermined radius relative to the first rotation axis AX1 along the rotation direction of the rotating portion 400, and the guide member 430 of the rotating portion 400 is inserted into the guide groove 100_G.

[0114] The support portion 200 may be arranged to protrude from the upper surface 100_US of the base 100 along a third direction DR3. In one embodiment, the support portion 200 may have a plate shape extending along the third direction DR3. The support portion 200 may include a placement surface 200_S1 for placing the clamp portion 300 and a back surface 200_S2 opposite to the placement surface 200_S1. In one embodiment, the placement surface 200_S1 may have a flat rectangular shape parallel to the first direction DR1 and the third direction DR3. When the clamp portion 300 is placed, the clamp portion 300 may be positioned such that the placement surface 200_S1 is opposite to another surface of the first clamp 310, which is the surface opposite to the surface of the first clamp 310 on which the test object T is placed.

[0115] The test object T can be attached to the clamp part 300 and placed on the support part 200. The clamp part 300 can be configured to be folded and unfolded. The clamp part 300 can be folded by applying pressure from the measuring part 500.

[0116] The clamping part 300 may include a first clamp 310, a second clamp 320 and a hinge 330.

[0117] The first clamp 310 and the second clamp 320 can be configured as plate-like components and are rotatably connected to each other via a hinge 330. When the clamp portion 300 is placed on the support portion 200, the first clamp 310 can be detachably attached to the support portion 200, and the second clamp 320 can be hooked onto the first clamp 310 via the hinge 330. In this case, the clamp portion 300 can be in an unfolded state with the first clamp 310 and the second clamp 320 flatly unfolded. When the clamp portion 300 is placed on the support portion 200, the hinge 330 can overlap with the first rotation axis AX1. Specifically, when the clamp portion 300 is placed on the support portion 200, the hinge axis of the hinge 330 of the first clamp 310 and / or the second clamp 320 based on their rotation can be arranged parallel to the first rotation axis AX1 and can be aligned overlapping with the first rotation axis AX1. When measuring repulsive force, the first clamp 310 can be fixed to the support portion 200, and the second clamp 320 can be rotated about the hinge 330, causing the clamp portion 300 to fold, thereby reducing the angle between one surface of the first clamp 310 and one surface of the second clamp 320 on which the test object T is placed. In some embodiments, the second clamp 320 can also be detachably attached to the support portion 200.

[0118] The test object T can be attached to one surface of the first clamp 310 and one surface of the second clamp 320. The surfaces of the first clamp 310 and the second clamp 320 can be surfaces facing each other when the clamp portion 300 is folded. The test object T can be attached to the first clamp 310 and the second clamp 320 using an adhesive member (e.g., adhesive tape). In one embodiment, the support member T_FM of the test object T can be attached to the first clamp 310 and the second clamp 320, exposing the display module T_DM of the test object T. In this case, the support member T_FM and the display module T_DM can be sequentially stacked on the first clamp 310 and the second clamp 320. In some embodiments, the display module T_DM of the test object T can also be attached to the first clamp 310 and the second clamp 320, exposing the support member T_FM of the test object T. In this case, the display module T_DM and the support member T_FM can be sequentially stacked on the first clamp 310 and the second clamp 320. In some embodiments, the test object T may further include an adhesive member disposed between the support member T_FM and the clamp portion 300.

[0119] Reference Figures 7 to 10 The support portion 200 may include a magnet 200_M, and the first clamp 310 and / or the second clamp 320 may include a magnetic member 300_M. The clamp portion 300 may be detachably coupled to the support portion 200 by magnetic force.

[0120] Magnet 200_M can be arranged on the placement surface 200_S1 of the support portion 200. In one embodiment, magnet 200_M can be arranged in a rod shape extending along a third direction DR3 in a portion of the placement surface 200_S1 of the support portion 200. In this case, the portion of the placement surface 200_S1 where magnet 200_M is arranged can be recessed to form a groove for receiving magnet 200_M, so that magnet 200_M does not protrude from the support portion 200. When clamp portion 300 is placed on the support portion 200, magnet 200_M can at least partially overlap with clamp portion 300 (e.g., first clamp 310).

[0121] When the clamp portion 300 is placed on the support portion 200, the magnetic member 300_M can be arranged in the overlapping region of the first clamp 310 and / or the second clamp 320 with the magnet 200_M of the support portion 200. In one embodiment, the magnetic member 300_M can be arranged at the side edges of the first clamp 310 and the side edges of the second clamp 320 extending in a direction intersecting the third direction DR3. Specifically, the magnetic member 300_M can be configured as a rod-shaped member shorter than the aforementioned side edges of the first clamp 310 and / or the second clamp 320, and both ends of the magnetic member 300_M can be bolted to the first clamp 310 or the second clamp 320. When the clamp portion 300 is placed, the length of the magnetic member 300_M in the first direction DR1 can be equal to or greater than the width of the magnet 200_M in the first direction DR1. The magnetic member 300_M can include metal. In one embodiment, the magnetic member 300_M can be formed of martensitic stainless steel. Figure 10 As shown, in one embodiment, the first clamp 310 and the support 200 are coupled together in the thickness direction, and at least a portion of the second clamp 320 can be hooked onto the first clamp 310 via a hinge 330. In this case, the magnetic member 300_M of the first clamp 310 can be arranged to at least partially span across the placement area of ​​the support 200 where the magnet 200_M is arranged. When measuring the repulsive force, the measuring unit 500 can measure the force by... Figure 10 The second clamp 320 shown is pressed against the opposite surface of one surface, causing the second clamp 320 to rotate relative to the first clamp 310 with respect to the hinge 330.

[0122] In some embodiments, the magnetic component 300_M may be arranged only on the first clamp 310. In some embodiments, the magnet 200_M may be arranged on the first clamp 310 and / or the second clamp 320, and the magnetic component 300_M may be arranged on the support portion 200. In some embodiments, the first clamp 310 and / or the second clamp 320 may also be formed of the magnetic component 300_M.

[0123] Reference Figure 7 , Figure 8 , Figure 11 and Figure 12 The rotating part 400 can be arranged on the upper surface 100_US of the base 100. One side of the rotating part 400 can be rotatably connected to the base 100, and the other side can be connected to the position adjustment part 600 (described later). The rotating part 400 can rotate with reference to a first rotation axis AX1 provided on one side of the rotating part 400 and extending along a third direction DR3. The first rotation axis AX1 can be perpendicular to the upper surface 100_US of the base 100.

[0124] The rotating part 400 may include an arm 410, a plate joint 420, and a guide member 430.

[0125] Arm 410 may have a rod shape extending in a centrifugal direction along the first rotation axis AX1. The centrifugal direction may be parallel to the upper surface 100_US of the base 100.

[0126] like Figure 11 and Figure 12 As shown, in a plane, the arm 410 can be arranged to form a predetermined angle with the placement surface 200_S1 of the support 200. For example, the arm 410 may form an angle of approximately 135° and / or 225° with respect to the placement surface 200_S1 of the support 200 in a plane before rotation. As another example, the arm 410 may be arranged to form an angle of approximately 45° and / or 315° with respect to the placement surface 200_S1 of the support 200 in a plane after rotation. In some embodiments, the arm 410 may be arranged to form an angle of approximately 270° with respect to the placement surface 200_S1 of the support 200 in a plane before rotation, and may be arranged to form an angle of approximately 90° with respect to the placement surface 200_S1 of the support 200 in a plane after rotation. However, the above angles are examples, and the arrangement angle of the arm 410 is not limited to these.

[0127] One side of the arm 410 can be rotatably fixed to the base 100 and / or the first rotation axis AX1. The arm 410 can rotate around one side of the arm 410 in the circumferential direction of the first rotation axis AX1. The circumferential direction of the first rotation axis AX1 can include a first rotation direction and a second rotation direction. The first rotation direction is the direction in which pressure is applied to the clamp portion 300 and the test object T placed on the clamp portion 300 to fold the clamp portion 300 and the test object T, and the second rotation direction is the opposite direction of the first rotation direction. The first rotation direction can be the direction in which the distance between the placement surface 200_S1 of the support portion 200 and the measuring portion 500 decreases, and the second rotation direction can be the direction in which the distance between the placement surface 200_S1 of the support portion 200 and the measuring portion 500 increases. The first rotation direction can be the direction in which the angle formed between the placement surface 200_S1 of the support portion 200 and the arm 410 decreases, and the second rotation direction can be the direction in which the angle formed between the placement surface 200_S1 of the support portion 200 and the arm 410 increases. For example, in Figure 11 and Figure 12 In this case, the first rotation direction can be clockwise, and the second rotation direction can be counterclockwise.

[0128] The arm 410 can be rotated to maintain a constant distance from the upper surface 100_US of the base 100. That is, the rotation path of the arm 410 can be parallel to the upper surface 100_US of the base 100. In some embodiments, the arm 410 can be supported by a connecting member CM to be spaced a predetermined distance from the upper surface 100_US of the base 100, wherein the connecting member CM connects a drive portion (not shown) mounted inside the base 100 to one side of the arm 410 and protrudes from the upper surface 100_US of the base 100.

[0129] The plate joint 420 can be arranged to protrude from the other side of the arm 410 along the third direction DR3, and can connect the fixing member 610 of the position adjustment part 600 (described later) and the arm 410.

[0130] The guide member 430 may be arranged between one side and the other side of the arm 410. The guide member 430 may protrude toward the base 100 and may be at least partially received in the guide groove 100_G of the base 100.

[0131] The measuring unit 500 can be arranged on the other side of the rotating unit 400. The measuring unit 500 can move through the rotating unit 400 to apply pressure to another surface of the second clamp 320 of the clamping unit 300. The other surface of the second clamp 320 can be the opposite surface of the second clamp 320 on which the test object T is placed. In one embodiment, the measuring unit 500 can perform circular motion with reference to the first rotation axis AX1 to apply pressure to the second clamp 320, causing the clamping unit 300 and the test object T placed on the clamping unit 300 to be folded. Thus, although the second clamp 320 rotates, since a force is applied perpendicularly to the other side of the second clamp 320, the repulsive force can be accurately measured according to the folding angle of the test object T. In some embodiments, the movement path of the measuring unit 500 may also include an ellipse or a straight line.

[0132] When the test object T is pressed, the measuring unit 500 can measure the repulsive force of the test object T. Specifically, when the pressing member 520 of the measuring unit 500 applies pressure to another surface of the second clamp 320, the second clamp 320 can rotate, such that the angle between one surface of the first clamp 310 on which the test object T is placed and one surface of the second clamp 320 decreases. In this case, the test object T is folded by the rotation of the second clamp 320, and the measuring unit 500 can measure the repulsive force required for the test object T to return to its original flat, unfolded state.

[0133] The measuring unit 500 may include a measuring device for measuring repulsive force, such as a push-pull force gauge, but is not limited thereto. In some embodiments, the measuring unit 500 may also include a display unit for displaying the measured repulsive force.

[0134] The measuring unit 500 may include a main body 510, a pressure-applying member 520, and a cover member 530.

[0135] The main body 510 may have a cuboid shape, and components and / or circuitry for measuring repulsive force may be installed inside the main body 510. The main body 510 is arranged on the other side of the arm 410 and on the position adjustment part 600 connecting the arm 410 and the measuring part 500. In detail, the main body 510 may be fixed to the sliding member 620 of the position adjustment part 600, which will be described later.

[0136] The pressure-applying member 520 protrudes from the main body 510 and applies pressure to another surface of the second clamp 320. The pressure-applying member 520 may be pin-shaped and may protrude from one surface of the main body 510, where this surface faces the other surface of the second clamp 320. Before applying pressure to the clamp portion 300, the position of the measuring portion 500 can be adjusted by the position adjustment portion 600 (described later), thereby changing the point at which the pressure-applying member 520 applies pressure to the second clamp 320. In one embodiment, the pressure-applying member 520 is arranged to protrude along the tangential direction of the circumferential motion path of the pressure-applying member 520 formed by the rotation of the rotating portion 400; therefore, even if the second clamp 320 rotates, a force can be applied perpendicularly to the other surface of the second clamp 320.

[0137] The cover member 530 is arranged to cover the end of the pressure-applying member 520. The cover member 530 can directly contact another surface of the second clamp 320. The cover member 530 can be formed of an elastic material, such as rubber or silicone. The cover member 530 can prevent the pressure-applying member 520 and the clamp portion 300 from deforming and / or being damaged due to repeated measurements. In some embodiments, the cover member 530 and the second clamp 320 can be magnetically coupled. For example, similar to the magnet 200_M of the support portion 200 and the magnetic member 300_M of the first clamp 310, the cover member 530 can include a magnet separate from the magnet 200_M of the support portion 200, and a magnetic member separate from the magnetic member 300_M can also be arranged on the back surface of the second clamp 320. Thus, the repulsive force when the test object T is folded can be measured by rotating the rotating portion 400 in a first rotation direction, and the repulsive force when the test object T is unfolded can be measured by rotating the rotating portion 400 in a second rotation direction.

[0138] Reference Figure 7 , Figure 8 , Figures 11 to 14 The position adjustment unit 600 can be arranged on the other side of the arm 410 and can adjust the position of the measuring unit 500. Specifically, the position adjustment unit 600 can adjust the position of the measuring unit 500, thereby changing the point at which the pressure-applying member 520 of the measuring unit 500 applies pressure to another surface of the second clamp 320.

[0139] The position adjustment unit 600 may include a fixed member 610 and a sliding member 620.

[0140] The fixing member 610 can be connected to the plate joint 420 provided on the other side of the arm 410. The fixing member 610 can be fixed to the other side of the arm 410 such that its relative position with respect to one side of the arm 410 and / or the first rotation axis AX1 is immutable.

[0141] The fixing member 610 may include a first plate 611 and a guide protrusion 612.

[0142] The first plate 611 can be configured as a plate-like member parallel to the first direction DR1 and the second direction DR2. The lower surface of the first plate 611 can be supported by a plate joint 420 projecting upward from the other side of the arm 410, such that the first plate 611 is spaced apart from the upper surface 100_US of the arm 410 and the base 100. The second plate 621 can be slidably disposed on the upper surface of the first plate 611. In one embodiment, a marker MK (e.g., a ruler) for precisely controlling the pressure point can be disposed on the upper surface of the first plate 611 overlapping with the pressure member 520 in the third direction DR3.

[0143] The guide protrusion 612 can protrude upward from the upper surface of the first plate 611. In one embodiment, multiple guide protrusions 612 can be arranged, with the measuring portion 500 located among the multiple guide protrusions 612. The guide protrusion 612 can be inserted into the guide slit 622, which will be described later.

[0144] The sliding member 620 can be slidably coupled to the fixed member 610. The measuring part 500 can be fixed to the sliding member 620, and by moving the sliding member 620, the relative position of the sliding member 620 and the measuring part 500 fixed to the sliding member 620 relative to one side of the arm 410 and / or the first rotation axis AX1 can be changed.

[0145] The sliding member 620 may include a second plate 621 and a guide slit 622.

[0146] The second plate 621 can be configured as a plate-like member parallel to the first direction DR1 and the second direction DR2. The second plate 621 can be arranged on the first plate 611 such that it at least partially overlaps the first plate 611 along the third direction DR3. The lower surface of the second plate 621 can be placed and supported on the upper surface of the first plate 611, and the main body 510 of the measuring part 500 can be fixed on the upper surface of the second plate 621. The second plate 621 can be slidably arranged relative to the first plate 611 in at least one direction, thereby changing the position of the measuring part 500. Hereinafter, a second plate 621 that moves in two directions is illustrated, but the direction of movement of the second plate 621 is not limited to this.

[0147] The guide slit 622 can penetrate the second plate 621 in the third direction DR3. Multiple guide slits 622 can be arranged, with the measuring part 500 located among them. The guide protrusion 612 of the first plate 611 can be inserted into the guide slit 622. The guide slit 622 can extend a predetermined length in a direction intersecting the radial direction of the first rotation axis AX1 and / or the extension direction of the arm 410 to guide the movement direction of the second plate 621. In one embodiment, the guide slit 622 can be formed at an angle of approximately 45° to the radial direction of the first rotation axis AX1 and / or the extension direction of the arm 410. In one embodiment, as... Figure 11 As shown, before the rotating part 400 rotates and / or before the clamping part 300 is folded, the guide slit 622 can be aligned parallel to the extending direction (e.g., the first direction DR1) of the placement surface 200_S1 of the support part 200. Furthermore, as... Figure 12 As shown, even after the rotating part 400 has fully rotated and / or the clamping part 300 has been fully folded, the guide slit 622 can still be aligned parallel to the extending direction (e.g., the first direction DR1) of the placement surface 200_S1 of the support part 200. This makes it easier to identify the pressure point of the measuring part 500 and allows for more precise adjustment of the pressure point.

[0148] Reference Figure 13 and Figure 14 As described above, the pressure point of the measuring unit 500 can be changed by moving the second plate 621. Specifically, the second plate 621 can slide in one direction and in another direction opposite to the aforementioned one direction. The aforementioned one direction and another direction can be directions intersecting the radial direction of the circular motion of the measuring unit 500. The aforementioned radial direction can be a direction perpendicular to the first rotation axis AX1 and / or the direction in which the arm 410 of the rotating unit 400 extends. In some embodiments, the second plate 621 can also further move in a direction parallel to the aforementioned radial direction.

[0149] One of the aforementioned directions can be the direction in which the end of the pressure-applying member 520 is away from the first rotation axis AX1, and the other of the aforementioned directions can be the direction in which the end of the pressure-applying member 520 is close to the first rotation axis AX1. One of the aforementioned directions can be the direction in which the radius of the circular motion of the measuring unit 500 decreases, and the other of the aforementioned directions can be the direction in which the radius of the circular motion of the measuring unit 500 increases. For example, in Figure 13 and Figure 14In this context, one of the aforementioned directions can be the right-hand direction, and the other direction can be the left-hand direction. When the second plate 621 and the measuring part 500 fixed to the second plate 621 move in one direction, the distance from the end of the pressure member 520 to the first rotation axis AX1 can increase. Furthermore, when the second plate 621 and the measuring part 500 fixed to the second plate 621 move in the other direction, the distance from the end of the pressure member 520 to the first rotation axis AX1 can decrease. Therefore, when the second plate 621 moves in one direction, the point where the pressure member 520 applies pressure to the other surface of the second clamp 320 can move away from the hinge 330 of the clamp part 300, and when the second plate 621 moves in the other direction, the point where the pressure member 520 applies pressure to the other surface of the second clamp 320 can move closer to the hinge 330.

[0150] When the measuring unit 500 moves in one direction, it can be located in a first position; and when it moves in another direction, it can be located in a second position. Figure 11 As shown, if the position of the measuring part 500 when the guide protrusion 612 is located in the center of the guide slit 622 is taken as the reference position, the first position can be further away from the first rotation axis AX1 and / or the hinge 330 of the clamping part 300 than the reference position, and the second position can be closer to the first rotation axis AX1 and / or the hinge 330 of the clamping part 300 than the reference position.

[0151] That is, the repulsion measuring device according to one embodiment can easily change the pressure point of the measuring section 500, thereby flexibly responding to changes in the size of the test object T and / or the fixture section 300, and can set the pressure point of the test object T and / or the fixture section 300 to be measured in various ways.

[0152] Figure 15 This is a flowchart of a repulsion force measurement method according to one embodiment. Figure 16 This is a perspective view showing the clamping part placed on the support part. Figure 17 This is a perspective view showing the position of the measuring unit adjusted by the position adjustment unit. Figure 18 It is a perspective view showing the measuring part rotating through the rotating part and measuring the repulsive force of the test object.

[0153] The following repulsive force measurement methods can be used Figures 7 to 14 The repulsive force measuring device 10 is used to perform the operation.

[0154] Reference Figure 15The repulsive force measurement method may include: placing a clamp portion 300 with the test object T attached onto a support portion 200 via a first clamp 310 and a second clamp 320 connected to the first clamp 310 via a hinge 330; and applying pressure to the opposite surface of the surface with the test object T attached to the second clamp 320 via a measuring portion 500 that performs circular motion with reference to a first rotation axis AX1, causing the test object T to be folded, and measuring the repulsive force of the test object T.

[0155] The step of placing the clamp portion 300 on the support portion 200 may include the step of magnetically attaching the first clamp 310 to the support portion 200.

[0156] The repulsion measurement method may further include the step of adjusting the pressure point on the opposite surface of the second clamp 320 by adjusting the position of the measuring unit 500.

[0157] The test object T can be a foldable display device 1 including a flexible display panel DP.

[0158] The steps of the above-described repulsion force measurement method are exemplary, and at least some of the steps may be omitted, or refer to... Figures 1 to 14 It may also include at least one additional step.

[0159] In the following text, reference will be made to Figures 16 to 18 Describe in detail the method for measuring repulsive force.

[0160] Reference Figure 16 The clamp portion 300 with the test object T attached can be placed on the support portion 200 of the repulsion measuring device 10. In this case, the first clamp 310 can be fixed to the support portion 200, and the second clamp 320 can be arranged to be attached to one side of the first clamp 310. Figure 9 and Figure 10 As shown, the first clamp 310 and the support 200 can be detachably connected by magnetic force.

[0161] The test object T can be attached and secured to the clamp portion 300 using an adhesive member such as adhesive tape. As described above, the test object T may include a flexible display module T_DM and a support member T_FM supporting the display module T_DM. In some embodiments, the test object T may be a flexible display module. In some embodiments, the test object T may be a foldable display device. In some embodiments, the test object T may be... Figure 1 The display device 1. In this case, the first non-folding area NFA1 of the display device 1 can be attached to the first clamp 310, and the second non-folding area NFA2 can be attached to the second clamp 320.

[0162] The clamp portion 300 and the test object T, placed on the support portion 200, can be in an unfolded state. In the unfolded state, the first clamp 310 and the second clamp 320 can be unfolded flat. In this case, the angle between the first clamp 310 and the second clamp 320 can be approximately 180°.

[0163] Before the rotating part 400 rotates, the measuring part 500 can be in an initial position. The initial position can be the position with the largest angle between the pressure member 520 of the measuring part 500 and the placement surface 200_S1 of the clamp part 300, with the first rotation axis AX1 as a reference. For example, as... Figure 11 As shown, in the initial position, the angle between the pressure member 520 and the placement surface 200_S1 can be approximately 180°. In the initial position, the end of the pressure member 520 and the placement surface 200_S1 can be aligned parallel to each other along a first direction DR1, with reference to another surface of the first clamp 310 and another surface of the second clamp 320, so that the clamp portion 300 is not folded. The pressure member 520 can be arranged perpendicular to the other surface of the second clamp 320. The end of the pressure member 520 can contact the other surface of the second clamp 320, but is not limited thereto.

[0164] Reference Figure 17 After placing the clamping unit 300, the position of the measuring unit 500 can be adjusted. For example, as Figure 13 As shown, when the size of the clamping part 300 and / or the test object T placed on the clamping part 300 is large, the second plate 621 can be moved in one direction to increase the distance between the pressure member 520 and the first rotation axis AX1. As another example, such as... Figure 14 As shown, when the size of the clamping part 300 and / or the test object T placed on the clamping part 300 is small, the second plate 621 can be moved in another direction to reduce the distance between the pressure member 520 and the first rotation axis AX1. As described above, the distance between the hinge 330 of the clamping part 300 and the pressure point of the pressure member 520 can be adjusted by the above adjustment.

[0165] Reference Figure 18After adjusting the position of the measuring part 500, the rotating part 400 can be rotated, causing the measuring part 500 to apply pressure to another surface of the second clamp 320. The measuring part 500 can perform circular motion via the rotating part 400 to apply pressure to the other surface of the second clamp 320. The clamp part 300 and the test object T placed on the clamp part 300 can be folded by the pressure of the measuring part 500, and the measuring part 500 can measure the repulsive force of the test object T. The rotating part 400 can rotate about 180° to completely fold the clamp part 300, or it can rotate about greater than 0° and less than 180° to partially fold the clamp part 300. The pressure member 520 of the measuring part 500 can remain in contact with the clamp part 300 during the rotation of the rotating part 400. In one embodiment, as Figure 11 and Figure 12 As shown, before and after the rotation of the rotating part 400, and during the rotation of the rotating part 400, the pressure-applying member 520 of the measuring part 500 can maintain perpendicular contact with the second clamp 320. The measuring part 500 can measure at least one of the repulsive force at the moment the test object T is folded, the repulsive force during the folding of the test object T, the repulsive force according to the folding angle of the test object T, and the repulsive force after the test object T is fully folded. In some embodiments, the measuring part 500 can reciprocate by the rotating part 400 to repeatedly perform the repulsive force measurement as described above.

[0166] After the repulsion measurement is completed, the measuring unit 500 can return to the initial position, and the clamping unit 300 can be removed from the support unit 200.

[0167] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that the invention can be implemented in other specific forms without altering the technical concept or essential features of the invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

Claims

1. A repulsive force measuring device, comprising: a base; a support connected to the base; a clamp placed on the support and including a first clamp, a second clamp separated from the first clamp, and a hinge connecting the first clamp and the second clamp; a rotating part connected to the base so as to be rotatable with a first rotation axis as a reference; a measuring part connected to the rotating part and moved by the rotating part so as to press the second clamp; and a position adjusting part connecting the rotating part and the measuring part and adjusting a position of the measuring part so as to change a first point at which the measuring part presses the second clamp.

2. The repulsive force measuring device according to claim 1, wherein the first clamp is detachably coupled to the support.

3. The repulsive force measuring device according to claim 1, wherein the position adjusting part adjusts the position of the measuring part so as to change a distance between the hinge and the first point.

4. The repulsive force measuring device according to claim 1, wherein the measuring part performs a circular motion with the first rotation axis as a reference, and the position adjusting part adjusts the position of the measuring part so as to change a radius of the circular motion of the measuring part.

5. The repulsive force measuring device according to claim 4, wherein the position adjusting part includes a fixed member fixed to the rotating part and a sliding member slidably coupled to the fixed member, and the measuring part is fixed to the sliding member.

6. The repulsive force measuring device according to claim 5, wherein the sliding member slides in one direction intersecting a radial direction of the circular motion and another direction opposite to the one direction.

7. The repulsive force measuring device according to claim 6, wherein when the sliding member moves in the one direction, a distance between the hinge and the first point is reduced, and when the sliding member moves in the other direction opposite to the one direction, the distance between the hinge and the first point is increased.

8. The repulsive force measuring device according to claim 5, wherein the fixed member includes a first plate connected to the rotating part and a guide protrusion protruding from the first plate, and the sliding member includes a second plate at least partially overlapping the first plate and a guide slit formed through the second plate and into which the guide protrusion is inserted.

9. The repulsive force measuring device according to claim 8, wherein the first plate includes a marker for adjusting a position of the measuring part with respect to the first plate.

10. The repulsive force measuring device according to claim 1, wherein the first clamp and the second clamp each include one surface on which a test object is to be placed and another surface opposite to the one surface, and the measuring part presses the another surface of the second clamp.

11. The repulsive force measuring device according to claim 10, wherein When the second clamp is pressed, the second clamp rotates such that an angle between the one surface of the first clamp and the one surface of the second clamp decreases, the test object is folded by the rotation of the second clamp, and the measuring section measures a repulsive force of the test object when the test object is folded.

12. The repulsion measuring device of claim 11, wherein, The test object includes a flexible display panel.

13. The repulsive force measuring apparatus according to claim 1, wherein The measuring section performs a circular motion with the first rotation axis as a reference to press the second clamp.

14. The repulsive force measuring apparatus according to claim 1, wherein The support section includes a magnet, and the first clamp includes a magnetic member that magnetically bonds to the magnet.

15. The repulsive force measuring apparatus according to claim 1, wherein The clamp section is placed on the support section such that the hinge is disposed on the first rotation axis.

16. The repulsive force measuring apparatus according to claim 1, wherein The measuring section includes a main body section, a pressing member that protrudes from the main body section, and a cover member that covers an end portion of the pressing member.

17. A repulsive force measuring method comprising: a step of attaching a test object to a clamp section including a first clamp and a second clamp connected to the first clamp via a hinge, and placing the clamp section to which the test object is attached on a support section; a step of pressing, by a measuring section that performs a circular motion with a first rotation axis as a reference, an opposite surface of a surface of the second clamp to which the test object is attached, such that the test object is folded, and measuring a repulsive force of the test object; and a step of adjusting a pressing point at which the measuring section presses the opposite surface of the second clamp by adjusting a position of the measuring section.

18. The repulsion measuring method according to claim 17, wherein, The step of placing the clamp section on the support section includes: a step of magnetically bonding the first clamp to the support section.

19. The repulsive force measuring method according to claim 17, wherein The test object is a foldable display apparatus including a flexible display panel.

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