Electronic device including grounded touch screen

Abstract

An electronic device according to various embodiments of the present disclosure may comprise: a touch screen panel layer including a touch sensor; and a backlight unit positioned below the touch screen panel layer. The backlight unit may comprise: a light guide plate having a surface parallel to the touch screen panel layer; a plurality of light-emitting elements positioned at one end of the light guide plate; a light source circuit board on which the plurality of light-emitting elements are disposed and which at least partially overlaps the surface of the light guide plate; and a conductive adhesive member electrically connected to a ground of the electronic device and having a portion in contact with one surface of the light guide plate.

Description

Electronic devices containing grounded touch screens

[0001] The present disclosure relates to electronic devices, and more particularly, to electronic devices including a grounded touch screen.

[0002] Electronic devices may include a display that provides visual information to the user and an input device that receives user input. For example, the electronic device may include a touchscreen, which combines a touch input device and a display. The touchscreen allows the user to directly input information displayed on the display. Furthermore, the touchscreen can maximize the display area while reducing the size and weight of the electronic device.

[0003] The touch screen may include a pressure-sensitive touch screen that detects local pressure changes on the display surface in response to a user's touch input and / or a capacitive touch screen that detects local capacitance changes of the touch screen in response to a user's touch. In various embodiments, the capacitive touch screen may detect a user's touch input by detecting that different Rx (receive) signals are generated in response to changes in the capacitance of the touch screen in response to a Tx (transmit) signal of a predetermined frequency.

[0004] When a Tx signal is generated for touch sensing of a touch screen, an electric field that vibrates with a period corresponding to the Tx signal may be generated around the touch screen. This periodic electric field may vibrate charged materials. For example, plastic materials such as a light guide plate of a backlight unit of a display may be charged with positive or negative charges. These charged materials may vibrate due to the periodic electric field generated by the Tx signal of the touch screen, and may resonate with the frequency of the Tx signal. The above-mentioned vibration may generate noise in the audible frequency band. Noise in the audible frequency band generated from electronic devices deteriorates the user's experience using the electronic devices.

[0005] According to various embodiments of the present disclosure, an electronic device with reduced noise generated by a touch screen can be provided.

[0006] An electronic device according to various embodiments of the present disclosure may include a touch screen panel layer including a touch sensor and a backlight unit positioned below the touch screen panel layer. The backlight unit may include a light guide plate having a surface parallel to the touch screen panel layer, a plurality of light emitting elements positioned at one end of the light guide plate, a light source circuit board on which the plurality of light emitting elements are arranged and which at least partially overlaps the surface of the light guide plate, and a conductive adhesive member electrically connected to a ground of the electronic device and having a portion in contact with one surface of the light guide plate.

[0007] A display according to various embodiments of the present disclosure may include a touch screen panel layer including a touch sensor and a backlight unit positioned below the touch screen panel layer.

[0008] The backlight unit may include a light guide plate having a surface parallel to the touch screen panel layer, a plurality of light emitting elements positioned at one end of the light guide plate, a light source circuit board on which the plurality of light emitting elements are arranged and at least partially overlaps the surface of the light guide plate, and a conductive adhesive member electrically connected to a ground of the electronic device and having a portion in contact with one surface of the light guide plate.

[0009] According to various embodiments of the present disclosure, an electronic device includes a conductive adhesive member that connects a ground electrode of a light guide plate and a circuit board, thereby reducing or eliminating charges on the surface of the light guide plate by discharging the charges through the ground electrode, thereby reducing or eliminating noise generated by the light guide plate vibrating due to a Tx signal of a touch screen.

[0010] FIG. 1 is a block diagram of an exemplary electronic device capable of performing the operations described herein.

[0011] FIG. 2A is a plan view and a side view illustrating a display of an electronic device according to various embodiments.

[0012] FIG. 2b is a cross-sectional view showing a display of an electronic device according to various embodiments.

[0013] FIG. 2c is a cross-sectional view showing a display of an electronic device according to various embodiments.

[0014] FIG. 2d is a schematic diagram showing an operation of removing static charge of a light guide plate of the present disclosure in various embodiments.

[0015] FIG. 3A is a plan view of a backlight unit of an electronic device according to various embodiments.

[0016] FIG. 3b is a plan view of a backlight unit of an electronic device according to various embodiments.

[0017] FIG. 4 is a cross-sectional view of an electronic device according to various embodiments.

[0018] FIG. 5A is a cross-sectional view of a display of an electronic device according to various embodiments.

[0019] FIG. 5b is a cross-sectional view of a display of an electronic device according to various embodiments.

[0020] FIG. 6A is a perspective view showing a backlight unit according to various embodiments.

[0021] FIG. 6b is a cross-sectional view showing a backlight unit according to various embodiments.

[0022] FIG. 1 is a block diagram of an exemplary electronic device (100) capable of performing the operations described herein. Referring to FIG. 1, the electronic device (100) may be one of various forms of electronic devices, such as a notebook (190), smartphones (191) having various form factors (e.g., a bar-type smartphone (191-1), a foldable-type smartphone (191-2), or a sliderable (or rollable) type smartphone (191-3)), a tablet (192), a cellular phone (not shown), a smartwatch (not shown), and other similar computing devices (not shown). The components, their relationships, and their functions depicted in FIG. 1 are exemplary only and do not limit the implementations described or claimed herein. The electronic device (100) may be referred to as a mobile device, a user device, a multi-function device, a portable device, or a server.

[0023] The electronic device (100) may include components including at least one processor (110) (hereinafter referred to as processor (110)), at least one memory (120) (hereinafter referred to as memory (120)), at least one display (140) (hereinafter referred to as display (140)), at least one image sensor (150) (hereinafter referred to as image sensor (150)), at least one communication circuit (160) (hereinafter referred to as communication circuit (160)), and / or at least one sensor (170) (hereinafter referred to as sensor (170)). The above components are merely exemplary. For example, the electronic device (100) may include other components (e.g., power management integrated circuitry (PMIC), audio processing circuitry, an antenna, a rechargeable battery, or an input / output interface). For example, some components may be omitted from the electronic device (100). For example, some components may be integrated into one component.

[0024] The processor (110) may be implemented as one or more IC (integrated circuit (or circuitry)) chips and may perform various data processing. The processor (110) may include at least one electrical circuit and may individually or collectively perform distributed processing of instructions (or programs, data, etc.) stored in the memory (120). The processor (110) may include a processor assembly including one or more processing circuits. The processor (110) may include any processing circuit operative to control the performance and operations of one or more components (e.g., the memory (120), the display (140), the image sensor (150), the communication circuit (160), and / or the sensor (170)) of the electronic device (100). For example, the processor (110) (e.g., the application processor (AP)) may be implemented as a system on chip (SoC) (e.g., a single chip or a chipset). For example, the processor (110) may be implemented with multiple cores (or at least one core circuit), multiple chips, or multiple chipsets. For example, the processor (110) may include one or more processing circuits. For example, the processor (110) may include one or more processing circuits configured to individually and / or collectively perform various functions of the present disclosure. As a non-limiting example, at least a portion of the processor (110) may be included in a first chip of the electronic device (100), and at least another portion of the processor (110) may be included in a second chip of the electronic device (100) that is different from the first chip of the electronic device (100).

[0025] For example, the processor (110) may include a central processing unit (CPU) (111), a graphics processing unit (GPU) (112), a neural processing unit (NPU) (113), an image signal processor (ISP) (114), a display controller (115), a memory controller (116), a storage controller (117), a communication processor (CP) (118), and / or a sensor interface (119). These components of the processor (110) are merely exemplary. For example, the processor (110) may further include other components. For example, some components of the processor (110) may be omitted from the processor (110). For example, some components of the processor (110) may be included as separate components of the electronic device (100) outside the processor (110). For example, some components of the processor (110) (e.g., memory controller (116)) may be included within other components (e.g., at least a portion of memory (120), an interface (e.g., available for connection to at least one component of the electronic device (100)), a display (140) and / or an image sensor (150)).

[0026] The processor (110) may cause other components of the electronic device (100) to perform various operations by executing instructions stored in the memory (120). The CPU (111) (or central processing circuit) may be configured to control components of the processor (110) based on the execution of instructions stored in the memory (120) (e.g., volatile memory (121) and / or non-volatile memory (122)). The GPU (112) (or graphics processing circuit) may be configured to execute parallel operations (e.g., rendering). The NPU (113) (or neural processing circuit, or artificial intelligence (AI) chip) may be configured to execute operations for an artificial intelligence model (e.g., convolution computation). The ISP (114) (or image signal processing circuit) may be configured to process a raw image acquired through the image sensor (150) into a format suitable for a component within the electronic device (100) or a component of the processor (110). The display controller (115) (or display control circuit, or display processing unit (DPU)) may be configured to process an image acquired from the CPU (111), the GPU (112), the ISP (114), or the memory (120) (e.g., the volatile memory (121)) into a format suitable for the display (140). The memory controller (116) (or memory control circuit) may be configured to control reading data from the volatile memory (121) and writing data to the volatile memory (121). The storage controller (117) (or storage control circuit) may be configured to control reading data from the nonvolatile memory (122) and writing data to the nonvolatile memory (122).The CP (118) (communication processing circuit) may be configured to process data acquired from a component of the processor (110) into a format suitable for transmission to another electronic device via the communication circuit (160), or to process data acquired from another electronic device via the communication circuit (160) into a format suitable for processing by the component of the processor (110). For example, the communication circuit (160) may include one or more communication circuits. The sensor interface (119) (or sensing data processing circuit, sensor hub) may be configured to process data about the state of the electronic device (100) and / or the state of the surroundings of the electronic device (100), acquired via the sensor (170), into a format suitable for the component of the processor (110).

[0027] The memory (120) may include one or more storage media (or one or more storage devices). For example, the memory (120) may include a memory assembly including one or more storage media. For example, the one or more storage media may include permanent memory (e.g., non-volatile memory (122)) such as a hard drive, flash memory, read-only memory (ROM), semi-permanent memory (e.g., volatile memory (121)) such as random access memory (RAM), any other suitable type of storage (or storage assembly), or any combination thereof. The memory (120) may include cache memory, which is one or more different types of memory used to temporarily store data for a function or feature of the electronic device (100). As a non-limiting example, the cache memory may be included within the processor (110). The memory (120) may be fixedly embedded within the electronic device (100) or incorporated into one or more suitable types of components (e.g., a subscriber identity module (SIM) card and / or a secure digital (SD) card) that may be repeatedly inserted into and removed from the electronic device (100).

[0028] For example, the memory (120) may store one or more software applications, such as an operating system (or system) software application, a firmware software application, a driver software application, a plug-in (e.g., add-in, add-on, and / or applet) software application, and / or any other suitable software applications. For example, the one or more software applications may include instructions executable by the processor (110). For example, the memory (120) may store instructions callable by an application programming interface (API). For example, the memory (120) may store instructions within a library.

[0029] Electronic devices according to the various embodiments disclosed in this document may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to the embodiments of this document are not limited to the aforementioned devices.

[0030] The various embodiments of this document and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among those phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0031] The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0032] Various embodiments of the present document may be implemented as software (e.g., a program (140)) including one or more instructions stored in a storage medium (e.g., an internal memory (136) or an external memory (138)) readable by a machine (e.g., an electronic device (100)). For example, a processor (e.g., a processor (120)) of the machine (e.g., an electronic device (100)) may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0033] According to one embodiment, the method according to various embodiments disclosed in the present document may be provided as included in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smart phones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0034] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0035] FIG. 2A is a plan view and a side view showing a display (201) of an electronic device (200) according to various embodiments.

[0036] FIG. 2b is a cross-sectional view showing a display (201) of an electronic device (200) according to various embodiments.

[0037] FIG. 2c is a cross-sectional view showing a display (201) of an electronic device (200) according to various embodiments.

[0038] FIG. 2d is a schematic diagram showing an operation of removing static charge of a light guide plate (221) of the present disclosure in various embodiments.

[0039] The cross-section of Fig. 2b is a cross-section taken along the AA direction of Fig. 2a.

[0040] Referring to FIGS. 2A to 2C, a display (201) (e.g., the display (201) (140) of FIG. 1) of an electronic device (200) (e.g., the electronic device (100) of FIG. 1) may include a touch screen panel layer (210) and a backlight unit (220). The touch screen panel layer (210) may display visual information and receive a user's touch input. In some embodiments, the touch screen panel may be covered by a window layer (202).

[0041] In various embodiments, the touch screen panel layer (210) may include a touch sensor (211) and a display panel (215). The display panel (215) may include a liquid crystal display (LCD) panel (e.g., a twisted nematic (TN) panel, a vertical alignment (VA) panel, and / or an in-plane switching (IPS) panel). The touch sensor (211) may be, for example, a capacitive touch sensor (211) including a Tx electrode (212) and an Rx electrode (213). In various embodiments, the touch sensor (211) may be a separate member from the display panel (215) and may be attached as an add-on to the upper or lower surface of the display panel (215). In various embodiments, the touch sensor (211) may be integrated with the display panel (215). For example, the touch screen panel layer (210) may be an in-cell type touch screen panel layer (210) in which the Tx and Rx electrodes (213) of the touch sensor (211) are formed on the TFT substrate of the LCD panel. Also, for example, the touch screen panel layer (210) may be an on-cell type touch screen panel layer (210) in which the touch sensor (211) is embedded under the polarizing layer of the LCD panel.

[0042] The backlight unit (220) may be a component that is positioned at the lower portion (e.g., in the -z direction) of the display panel (215) and includes a light-emitting element (223), for example, for the operation of a non-luminous display panel (215), such as an LCD. In various embodiments, the backlight unit (220) may be a member that moves the light-emitting element (223) (e.g., a light emitting diode (LED) and / or a cold cathode fluorescent light (CCFL)) and the light of the light-emitting element (223) in a direction parallel to the surface of the display (201) (e.g., a direction in the xy plane). For example, the light-emitting element (223) may be positioned at at least one side end of the light guide plate (221), and the light guide plate (221) may allow the light of the light-emitting element (223) to pass through the inside of the light guide plate (221) from one side end of the light guide plate (221). The light guide plate (221) may include a transparent polymer material such as, for example, PMMA (poly methyl methacrylate), polycarbonate, and / or PET (polyethylene terephthalate).

[0043] In various embodiments, the display (201) may include an edge-emitting backlight unit (220) in which the light-emitting element (223) is positioned at at least one side edge of the light guide plate (221). In other embodiments, the display (201) may include a direct-emitting backlight unit (220) in which the light-emitting element (223) is positioned so as to directly face the light-emitting element.

[0044] In various embodiments, the backlight unit (220) may further include a light diffusion member (e.g., a light diffusion plate and / or a prism sheet) positioned above (e.g., in the z direction) the light guide plate (221) and which increases the uniformity of light of the backlight unit (220).

[0045] In various embodiments, the backlight unit (220) may include a light source circuit board (225). The light source circuit board (225) may be a circuit board on which a light emitting element (223) is disposed and which supplies power and control signals to the light emitting element (223). The light source circuit board (225) may include a printed circuit board (PCB), a flexible printed circuit board (FPCB), and / or a rigid-flexible printed circuit board (RFPCB). The light source circuit board (225) may be electrically connected to a circuit board (203) of the electronic device (200) (e.g., a main circuit board or an auxiliary circuit board) and may be electrically connected to a ground (204) of the electronic device (200) to be grounded. The ground (204) of the electronic device (200) may be a large-area conductor (e.g., the ground (204) plane of a circuit board and / or the exterior metal of the electronic device (200)) having a potential that serves as a reference for the electric potential of the electronic device (200).

[0046] In various embodiments, the backlight unit (220) may include a conductive adhesive member (230). The conductive adhesive member (230) may be a component that secures a component of the backlight unit (220) (e.g., a light guide plate (221)) to another component (e.g., a metal frame (240) described below). In addition, the conductive adhesive member (230) may be a component that grounds a component of the backlight unit (220) (e.g., a light guide plate (221)). For example, the conductive adhesive member (230) may have one region that is grounded (e.g., electrically connected to the ground (204) of the electronic device (200)) and another region that is in contact with a component of the backlight unit (220) (e.g., a light guide plate (221)). Accordingly, static electricity may not accumulate on the component of the backlight unit (220), or at least a portion of the accumulated static electricity may be discharged through the conductive adhesive member (230).

[0047] The conductive adhesive member (230) may include, for example, a conductive adhesive and / or a conductive tape. The conductive adhesive may be a mixture of an adhesive and conductive particles (e.g., metal, graphite, pyrolytic carbon, carbon nanotubes, metal fibers, carbon fibers, and / or conductive polymer fibers). The conductive tape may be a conductive adhesive applied on a metal foil and / or conductive polymer film substrate.

[0048] In various embodiments, the conductive adhesive member (230) may include a first conductive adhesive member (231) positioned between the light source circuit board (225) and the light guide plate (221). The first conductive adhesive member (231) may have one surface (e.g., a surface facing the -z direction) in contact with the light source circuit board (225) and an opposite surface (e.g., a surface facing the z direction) in contact with the light guide plate (221). The first conductive adhesive member (231) may mutually adhere and fix the light source circuit board (225) and the light guide plate (221). In addition, the first conductive adhesive member (231) may ground the light guide plate (221) to discharge static charges accumulated in the light guide plate (221).

[0049] Referring to FIG. 2D, the electronic device (200) may include a circuit board. The circuit board may be, for example, a circuit board on which components such as a processor of the electronic device (200) (e.g., the processor (110) of FIG. 1) are arranged. In various embodiments, the circuit board may include a ground (204) plane. The light source circuit board (225) of the backlight unit (220) is electrically connected to the circuit board (203) of the electronic device (200) via a cable (209), and may ultimately be electrically connected to the ground (204) plane. Accordingly, the charge (q) charged in the light guide plate may escape to the ground (204).

[0050] When the touch screen panel layer (210) is operated, a Tx signal (e.g., an electrical pulse) is transmitted through the Tx electrode (212), and an electric field may be formed around the Tx electrode (212) by the Tx signal. When a component of the backlight unit (220), for example, a light guide plate (221), is charged with static electricity, this electric field may cause vibration in the backlight unit (220) by applying an electric force to the static electricity. In addition, the backlight unit (220) may generate noise by resonating with the frequency of the Tx signal or a harmonic frequency thereof. According to the present disclosure, since the static electricity charged in the component of the backlight unit (220) (e.g., the light guide plate (221)) through the ground (204) is at least partially discharged, the vibration of the backlight unit (220) may be reduced or eliminated.

[0051] Referring again to FIGS. 2B and 2C , in various embodiments, the display (201) may include a metal frame (240) that supports components (e.g., a touch screen panel layer (210) and / or a backlight unit (220). The conductive adhesive member (230) may further include a second conductive adhesive member (233) and / or a third conductive adhesive member (237). The second conductive adhesive member (233) and the third conductive adhesive member (237) are described in more detail below.

[0052] FIG. 3A is a plan view of a backlight unit (220) of an electronic device (200) according to various embodiments.

[0053] FIG. 3b is a plan view of a backlight unit (220) of an electronic device (200) according to various embodiments.

[0054] In Fig. 3a, the illustration of the conductive adhesive member (230) is omitted for clarity.

[0055] In various embodiments, the light source circuit board (225) may include a first ground electrode (226). The first ground electrode (226) may be electrically connected to the ground (204) of the electronic device (200) and may be disposed on a surface of the light source circuit board (225) (e.g., an area on the surface of the light source circuit board (225) that overlaps the light guide plate (221). In various embodiments, the first conductive adhesive member (231) may have one surface in electrical contact with the first ground electrode (226).

[0056] In various embodiments, the light emitting element (223) may be arranged along at least one side edge of the light guide plate (221). For example, the light source circuit board (225) may extend along the side edge of the light guide plate (221), and the light emitting element (223) may be arranged and arranged along the side edge of the light guide plate (221) on the light source circuit board (225). A backlight unit (220) in which the light emitting element (223) is arranged on the side edge of the light guide plate (221) may be referred to as an edge-type backlight unit (220).

[0057] In various embodiments, the first ground electrode (226) may extend along the side edge of the light guide plate (221) on the light source circuit board (225). The first conductive adhesive member (231) may extend in the same direction as the first ground electrode (226). By extending the first ground electrode (226), the grounding surface area may be expanded, and thus the grounding resistance may be reduced, thereby improving the dissipative effect.

[0058] In various embodiments, the first conductive adhesive member (231) may have an extended surface (232) that is an area extending toward a side end of the light guide plate (221) in an area corresponding to the gap between the light emitting elements (223). In various embodiments, the first conductive adhesive member (231) having the extended surface (232) may have a sawtooth shape. For example, the extended surface (232) may extend in a direction perpendicular to the direction in which the first conductive member extends. Since the first conductive adhesive member (231) has the extended surface (232), the contact area between the first conductive adhesive member (231) and the light guide plate (221) increases, thereby improving the dissipative effect of the first conductive contact member. In addition, since the extended surface (232) is located in an area corresponding to the gap between the light emitting elements (223), the risk of a short circuit occurring due to contact between the first conductive adhesive member (231) and the light emitting elements (223) may be reduced.

[0059] FIG. 4 is a cross-sectional view of an electronic device (200) according to various embodiments.

[0060] Figure 4 is an enlarged view of portion C of Figure 2a.

[0061] Referring to FIG. 4, the display (201) may include a second conductive adhesive member (233). The second conductive contact member may be, for example, a member that secures the light guide plate (221) and the metal frame (240) to each other and grounds the light guide plate (221) through the metal frame (240). In various embodiments, the conductive adhesive member (230) may be in electrical contact with an upper surface of the light guide plate (221) (e.g., a z-direction surface and a surface facing the touch screen panel layer (210).

[0062] In various embodiments, the second conductive adhesive member (233) may include a conductive elastic member (234) and a conductive tape layer (235). The conductive elastic member (234) may be a member in which a conductive material (e.g., a mesh conductor and a conductive adhesive) is disposed on a surface of an elastic substrate such as a foam polymer. The conductive elastic member (234) may be referred to as a conductive foam gasket. The conductive elastic member (234) may fill a height difference (e.g., a step in the z-axis direction) between the conductive tape layer (235) and the light guide plate (221).

[0063] In various embodiments, the second conductive adhesive member (233) may further include an insulating layer (236). The insulating layer (236) may cover at least a portion of an area on the surface of the conductive tape layer (235) where the conductive elastic member (234) is not disposed. For example, the conductive elastic member (234) may be attached to some area of ​​the lower surface (e.g., a surface facing the -z direction) of the conductive tape layer (235), and the insulating layer (236) may be disposed on an area of ​​the lower surface where the conductive elastic member (234) is not attached. The insulating layer (236) may reduce or prevent the conductive elastic member (234) from coming into contact with other components (e.g., the light-emitting element (223)) within the electronic device (200) to cause a short circuit.

[0064] FIG. 5A is a cross-sectional view of a display (201) of an electronic device (200) according to various embodiments.

[0065] FIG. 5b is a cross-sectional view of a display (201) of an electronic device (200) according to various embodiments.

[0066] Referring to FIGS. 5A and 5B, the display (201) may include a third conductive adhesive member (237). In various embodiments, the third conductive adhesive member (237) may be attached to a lower portion of the light guide plate (221). In one embodiment, the third conductive adhesive member (237) may electrically connect the light guide plate (221) to a metal frame (240) of the display (201). The metal frame may be electrically connected to a ground (204) of the electronic device.

[0067] Referring to FIG. 5B, in various embodiments, the display (201) may include a digitizer layer (250). The digitizer layer (250) may be a layer that receives an electromagnetic inductive stylus input. In various embodiments, the digitizer layer (250) may include an induction coil circuit and a ground circuit connected to a ground (204) of the electronic device (200). In various embodiments, the digitizer may be located below the backlight unit.

[0068] In various embodiments, the digitizer layer (250) may further include a second ground pad. In various embodiments, the second ground pad of the digitizer layer (250) may be in electrical contact with the third conductive adhesive member (237). Accordingly, the light guide plate (221) may be electrically connected to the ground (204) of the electronic device (200) and grounded through the third conductive adhesive member (237) and the second ground pad.

[0069] FIG. 6a is a perspective view showing a backlight unit (320) according to various embodiments.

[0070] FIG. 6b is a cross-sectional view showing a backlight unit (320) according to various embodiments.

[0071] The cross-section of Fig. 6b is a cross-section taken along the EE direction of Fig. 6a.

[0072] Referring to FIGS. 6A and 6B, a backlight unit (320) according to various embodiments may be a direct-type backlight unit (320). The direct-type backlight unit (320) may include a light guide plate (321) and a plurality of light-emitting elements (323). A through hole (322) is formed in the light guide plate (321) to at least partially penetrate the light guide plate (321) in the thickness direction, and the light-emitting element (323) may be positioned within the through hole (322) of the light guide plate (321). Since the direct-type backlight unit (320) has a plurality of light-emitting elements (323) arranged on a surface parallel to the display surface of the display (201), it can implement a relatively improved contrast ratio compared to an edge-type backlight unit (for example, the backlight unit (220) illustrated in FIG. 2B) through technical means such as local dimming.

[0073] In various embodiments, the backlight unit (320) may include a conductive adhesive member (330) (e.g., a first conductive adhesive member (331) and a second conductive adhesive member (333)) attached to an edge portion of the light guide plate (321). With respect to the conductive adhesive member (330), reference may be made to the descriptions of the conductive adhesive member (230), the first conductive adhesive member (231), and the second conductive adhesive member (233) of FIGS. 2A to 5B, unless otherwise contradictory.

[0074] In various embodiments, the display (201) may include a circuit board (325). The circuit board (325) may be a circuit board (325) electrically connected to a plurality of light emitting elements (323), or may be a circuit board (325) that controls a display panel. The circuit board (325) may be a printed circuit board (PCB), a flexible printed circuit board (FPCB), and / or a rigid flexible printed circuit board (RFPCB). The circuit board (325) may be positioned to at least partially overlap a portion of a light guide plate (321) to which a conductive adhesive member (330) is attached. The circuit board (325) may include a ground electrode (326) electrically connected to a ground of the electronic device. The conductive adhesive member (330) may be in contact with the ground electrode (326) of the circuit board (325) to ground the light guide plate (321).

[0075] An electronic device (200) according to various embodiments of the present disclosure may include a touch screen panel layer (210) including a touch sensor (211) and a backlight unit (220) positioned below the touch screen panel layer (210).

[0076] The backlight unit (220) may include a light guide plate (221) having a surface parallel to the touch screen panel layer (210), a plurality of light emitting elements (223) positioned at one end of the light guide plate (221), a light source circuit board (225) on which the plurality of light emitting elements (223) are arranged and which at least partially overlaps the surface of the light guide plate (221), and a conductive adhesive member (230) electrically connected to a ground (204) of the electronic device (200) and having a portion in contact with one surface of the light guide plate (221).

[0077] In various embodiments, the conductive adhesive member (230) may include a first conductive adhesive member (231) having one surface in contact with the light source circuit board (225).

[0078] In various embodiments, the light source circuit board (225) may include a first ground electrode (226) formed on a surface that contacts the first surface of the first conductive adhesive member (231).

[0079] In various embodiments, the first ground electrode (226) may extend on the light source circuit board (225) in a direction parallel to the extension direction of the one end of the light guide plate (221), and the conductive adhesive member (230) may extend in the same direction as the first ground electrode (226) so as to cover the first ground electrode (226).

[0080] In various embodiments, the plurality of light-emitting elements (223) are arranged at a predetermined interval parallel to the extension direction of the one end of the light guide plate (221), and the first conductive adhesive member (231) may have an extended surface (232) extending toward the one end of the light guide plate (221) in an area corresponding to the predetermined interval between the plurality of light-emitting elements (223).

[0081] In various embodiments, the electronic device (200) may further include a metal frame (240) supporting the touch screen panel layer (210) and a second conductive adhesive member (233) electrically connecting the metal frame (240) and the light guide plate (221).

[0082] In various embodiments, the second conductive adhesive member (233) may include a conductive elastic member (234) having a first surface in electrical contact with the light guide plate (221) and a conductive tape layer (235) in contact with a second surface of the conductive elastic member (234) located opposite the first surface and electrically connected to the metal frame (240).

[0083] In various embodiments, the second conductive adhesive member (233) may further include an insulating layer (236) positioned to cover at least a portion of an area on the surface of the conductive tape layer (235) that is not in contact with the conductive elastic member (234).

[0084] In various embodiments, the backlight unit (220) may further include a digitizer layer (250) positioned at the bottom and configured to receive a stylus input, and a third conductive adhesive member (237) having one surface in contact with the light guide plate (221) and the other surface in contact with the digitizer layer (250).

[0085] In various embodiments, the digitizer layer (250) includes a second ground electrode (251) formed on a surface facing the backlight unit (220), and the third conductive adhesive member (237) may have a surface that is in electrical contact with the second ground electrode (251).

[0086] A display (201) according to various embodiments of the present disclosure may include a touch screen panel layer (210) including a touch sensor (211) and a backlight unit (220) positioned below the touch screen panel layer (210).

[0087] The backlight unit (220) may include a light guide plate (221) having a surface parallel to the touch screen panel layer (210), a plurality of light emitting elements (223) positioned at one end of the light guide plate (221), a light source circuit board (225) on which the plurality of light emitting elements (223) are arranged and which at least partially overlaps the surface of the light guide plate (221), and a conductive adhesive member (230) electrically connected to a ground (204) of the electronic device (200) and having a portion in contact with one surface of the light guide plate (221).

[0088] In various embodiments, the conductive adhesive member (230) may include a first conductive adhesive member (231) having one surface in contact with the light source circuit board (225).

[0089] In various embodiments, the light source circuit board (225) may include a first ground electrode (226) formed on a surface that contacts the first surface of the first conductive adhesive member (231).

[0090] In various embodiments, the first ground electrode (226) may extend on the light source circuit board (225) in a direction parallel to the extension direction of the one end of the light guide plate (221), and the conductive adhesive member (230) may extend in the same direction as the first ground electrode (226) so as to cover the first ground electrode (226).

[0091] In various embodiments, the plurality of light-emitting elements (223) are arranged at a predetermined interval parallel to the extension direction of the one end of the light guide plate (221), and the first conductive adhesive member (231) may have an extended surface (232) extending toward the one end of the light guide plate (221) in an area corresponding to the predetermined interval between the plurality of light-emitting elements (223).

[0092] In various embodiments, the electronic device (200) may further include a metal frame (240) supporting the touch screen panel layer (210) and a second conductive adhesive member (233) electrically connecting the metal frame (240) and the light guide plate (221).

[0093] In various embodiments, the second conductive adhesive member (233) may include a conductive elastic member (234) having a first surface in electrical contact with the light guide plate (221) and a conductive tape layer (235) in contact with a second surface of the conductive elastic member (234) located opposite the first surface and electrically connected to the metal frame (240).

[0094] In various embodiments, the second conductive adhesive member (233) may further include an insulating layer (236) positioned to cover at least a portion of an area on the surface of the conductive tape layer (235) that is not in contact with the conductive elastic member (234).

[0095] In various embodiments, the backlight unit (220) may further include a digitizer layer (250) positioned at the bottom and configured to receive a stylus input, and a third conductive adhesive member (237) having one surface in contact with the light guide plate (221) and the other surface in contact with the digitizer layer (250).

[0096] In various embodiments, the digitizer layer (250) includes a second ground electrode (251) formed on a surface facing the backlight unit (220),

[0097] The third conductive adhesive member (237) can have the other surface electrically contact the second ground electrode (251).

[0098] And the embodiments disclosed in this document disclosed in this specification and drawings are only specific examples to easily explain the technical contents according to the embodiments disclosed in this document and to help understand the embodiments disclosed in this document, and are not intended to limit the scope of the embodiments disclosed in this document. Therefore, the scope of the various embodiments disclosed in this document should be interpreted as including all changes or modified forms derived based on the technical ideas of the various embodiments disclosed in this document in addition to the embodiments disclosed herein.

Claims

1. In an electronic device (200), A touch screen panel layer (210) including a touch sensor (211); and It includes a backlight unit (220) located at the bottom of the above touch screen panel layer (210), The above backlight unit (220) is A light guide plate (221) having a surface parallel to the above touch screen panel layer (210); A plurality of light emitting elements (223) located at one end of the light guide plate (221); A light source circuit board (225) on which the plurality of light emitting elements (223) are arranged and at least partially overlap with the surface of the light guide plate (221); and An electronic device comprising a conductive adhesive member (230) electrically connected to the ground (204) of the electronic device (200) and having a portion thereof in contact with one surface of the light guide plate (221).

2. In paragraph 1, The above conductive adhesive member (230) An electronic device comprising a first conductive adhesive member (231) in contact with one side of the light source circuit board (225).

3. In paragraph 2, An electronic device in which the light source circuit board (225) includes a first ground electrode (226) formed on a surface that contacts the first surface of the first conductive adhesive member (231).

4. In paragraph 3, The above first ground electrode (226) extends on the light source circuit board (225) in a direction parallel to the extension direction of the one end of the light guide plate (221), An electronic device in which the conductive adhesive member (230) extends in the same direction as the first ground electrode (226) so as to cover the first ground electrode (226).

5. In paragraph 4, The above plurality of light emitting elements (223) are arranged at a predetermined interval parallel to the extension direction of the one end of the light guide plate (221), An electronic device in which the first conductive adhesive member (231) has an extended surface (232) extending toward the one end of the light guide plate (221) in an area corresponding to the predetermined spacing between the plurality of light emitting elements (223).

6. In paragraph 1, The electronic device (200) further includes a metal frame (240) supporting the touch screen panel layer (210) and a second conductive adhesive member (233) electrically connecting the metal frame (240) and the light guide plate (221).

7. In paragraph 6, The above second conductive adhesive member (233) is A conductive elastic member (234) having a first surface in electrical contact with the light guide plate (221); and An electronic device comprising a conductive tape layer (235) in contact with a second surface positioned opposite to the first surface of the conductive elastic member (234) and electrically connected to the metal frame (240).

8. In paragraph 7, The above second conductive adhesive member (233) is An electronic device further comprising an insulating layer (236) positioned to cover at least a portion of an area on the surface of the conductive tape layer (235) that is not in contact with the conductive elastic member (234).

9. In the display (201) of the electronic device (200), A touch screen panel layer (210) including a touch sensor (211); and It includes a backlight unit (220) located at the bottom of the above touch screen panel layer (210), The above backlight unit (220) is A light guide plate (221) having a surface parallel to the above touch screen panel layer (210); A plurality of light emitting elements (223) located at one end of the light guide plate (221); A light source circuit board (225) on which the plurality of light emitting elements (223) are arranged and at least partially overlap with the surface of the light guide plate (221); and A display including a conductive adhesive member (230) electrically connected to the ground (204) of the electronic device (200) and having a portion thereof in contact with one surface of the light guide plate (221).

10. In paragraph 9, The above conductive adhesive member (230) A display including a first conductive adhesive member (231) in contact with the light source circuit board (225) above the second portion.

11. In paragraph 10, A display in which the light source circuit board (225) includes a first ground electrode (226) formed on a surface that contacts the first surface of the first conductive adhesive member (231).

12. In paragraph 11, The above first ground electrode (226) extends on the light source circuit board (225) in a direction parallel to the extension direction of the one end of the light guide plate (221), The conductive adhesive member (230) extends in the same direction as the first ground electrode (226) to cover the first ground electrode (226).

13. In paragraph 12, The above plurality of light emitting elements (223) are arranged at a predetermined interval parallel to the extension direction of the one end of the light guide plate (221), A display in which the first conductive adhesive member (231) has an extended surface (232) extending toward the one end of the light guide plate (221) in an area corresponding to the predetermined spacing between the plurality of light emitting elements (223).

14. In paragraph 9, The electronic device (200) further includes a metal frame (240) supporting the touch screen panel layer (210) and a second conductive adhesive member (233) electrically connecting the metal frame (240) and the light guide plate (221).

15. In paragraph 14, The above second conductive adhesive member (233) is A conductive elastic member (234) having a first surface in electrical contact with the light guide plate (221); and A conductive tape layer (235) is included that is in contact with a second surface located opposite to the first surface of the conductive elastic member (234) and is electrically connected to the metal frame (240). The above second conductive adhesive member (233) is A display further comprising an insulating layer (236) positioned to cover at least a portion of an area on the surface of the conductive tape layer (235) that is not in contact with the conductive elastic member (234).

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