KR20240011433A - Electronic apparatus driving device and display device having the same - Google Patents

Abstract

A printed circuit board on which the main IC and memory are mounted on the top; and a cover shield covering an upper surface of the printed circuit board, wherein the cover shield has an opening formed at a position corresponding to the memory, and the opening is formed so that the main IC is not exposed, and the cover shield has an opening formed at a position corresponding to the memory. A larger electronic drive device can reduce EMI noise by allowing the original EMI noise to freely radiate through the opening before being reflected, overlapped, and amplified by the cover shield.

Description

Electronic device driving device and display device having the same {ELECTRONIC APPARATUS DRIVING DEVICE AND DISPLAY DEVICE HAVING THE SAME}

The present invention provides an electronic device driving device that reduces EMI noise without installing a separate conductive member to shield electromagnetic waves by forming an opening at a position corresponding to the memory in the cover shield covering the upper surface of the printed circuit board, and an electronic device driving device comprising the same. It concerns a display device.

In general, display devices have been developed to the extent that they can sufficiently perform the role of flat display devices, and are used not only as LCD screens for cell phones, PDAs, digital cameras, camcorders, and computer monitors, but also in large display devices such as TVs.

In the case of the above display device, signals are processed through a timing controller (T-CON), a printed circuit board (PCB) located on the back of the display panel, to display images.

Generally, electronic devices emit electromagnetic waves between electronic components mounted on a printed circuit board, causing electromagnetic interference (EMI). EMI causes problems such as causing malfunction of electronic devices or adversely affecting the human body. In particular, recently, as the operating frequency of electronic devices has increased from tens of MHz to several GHz, EMI problems are becoming more serious.

EMI noise refers to noise that causes noise problems due to interference when electromagnetic waves generated from one electronic circuit, device, or component are transmitted to other circuits, devices, or components.

Figure 1 is a diagram of a conventional driving device 290 for reducing EMI noise.

Referring to FIG. 1, a separate conductive member 256 is installed between the printed circuit board 250 and the shield case 260 to shield electromagnetic waves generated between electronic components to reduce EMI noise.

In addition, the printed circuit board 250 and the shield case 260 are fastened to each other with screws 269, and the ground voltage of the printed circuit board 250 is provided to the shield case 260 to expand the ground area and reduce EMI noise. I order it.

However, the higher the frequency of the electromagnetic wave, the more straight and reflective it is, so EMI noise is reflected and overlapped and amplified between the printed circuit board 250 and the shield case 260. Therefore, even with the separate conductive member 256, there is a limit to EMI noise reduction. There is.

In addition, the method of reducing EMI noise by expanding the ground area through fastening the screw 269 also has a problem in that there is a deviation in EMI noise reduction due to fastening the screw 269.

The present invention provides an electronic device driving device and a display device including the same. More specifically, an opening is formed at a position corresponding to the memory in a cover shield covering the upper surface of a printed circuit board, so that EMI noise is reflected on the cover shield. The purpose is to provide an electronic device driving device that reduces EMI noise by allowing the original EMI noise to freely radiate through the opening before being overlapped and amplified.

Another object of the present invention is to provide an electronic device driving device that prevents electronic devices from malfunctioning or being damaged by discharging heat generated by the operation of electronic components mounted on a printed circuit board through an opening formed in a cover shield.

Another object is to provide a display device including the above electronic device driving device.

A printed circuit board on which the main IC and memory are mounted on the top; and a cover shield covering an upper surface of the printed circuit board, wherein the cover shield has an opening formed at a position corresponding to the memory, and the opening is formed so that the main IC is not exposed, and the cover shield has an opening formed at a position corresponding to the memory. Provides an electronic device drive device that is larger than its size.

A plurality of the memories may be mounted adjacent to the main IC, and the number of openings may be formed corresponding to the number of memories.

It may further include at least one electronic component mounted adjacent to the main IC and the memory, and the plurality of openings may be formed so that the electronic component is not exposed.

The cover shield may be spaced apart from the printed circuit board to form a gap.

The cover shield may be made of metal, or its outer surface may be plated with metal.

The electronic device may include an OLED TV.

Also, a display panel; A printed circuit board that provides a driving signal to the display panel and has a main IC and memory mounted on the top surface; and a cover shield covering an upper surface of the printed circuit board, wherein the cover shield has an opening formed at a position corresponding to the memory, and the opening is formed so that the main IC is not exposed, and the cover shield has an opening formed at a position corresponding to the memory. Provides a display device larger than its size.

A plurality of the memories may be mounted adjacent to the main IC, and the number of openings may be formed corresponding to the number of memories.

The electronic device driving device and the display device including the same according to the present invention form an opening at a position corresponding to the memory in the cover shield that covers the upper surface of the printed circuit board, so that EMI noise is reflected on the cover shield, overlaps, and is amplified before it is amplified. EMI noise can be reduced by allowing the original EMI noise to freely radiate through the opening.

In addition, EMI noise can be reduced by forming an opening in the cover shield without installing a separate conductive member to shield electromagnetic waves, so there is an advantage that there is no need for separate manufacturing costs or additional manufacturing processes for the conductive member.

In addition, heat generated by the operation of electronic components mounted on the printed circuit board is discharged through the opening formed in the cover shield, thereby preventing electronic devices from malfunctioning or being damaged.

Further scope of applicability of the present invention will become apparent from the detailed description that follows. However, since various changes and modifications within the spirit and scope of the present invention may be clearly understood by those skilled in the art, the detailed description and specific embodiments such as preferred embodiments of the present invention should be understood as being given only as examples.

1 is a diagram of a conventional driving device for reducing EMI noise.
Figure 2 is a block diagram for explaining each configuration of the display device.
Figure 3 is a front perspective view showing an example of a display device.
Figure 4 is an exploded view of a display device according to an embodiment of the present invention.
Figure 5 is a diagram to explain that when a slit is formed in the cover shield, EMI noise is radiated through the slit.
Figure 6 is a diagram showing a cover shield with an opening and an area from which EMI noise is radiated in an electronic device driving device according to an embodiment of the present invention.
FIG. 7 shows data on EMI noise when a slit is formed in the cover shield of FIG. 5.
Figure 8 shows data on EMI noise when an opening is formed in the cover shield in an electronic device driving device according to an embodiment of the present invention.

Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the attached drawings. However, identical or similar components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted. The suffixes “module” and “part” for components used in the following description are given or used interchangeably only for the ease of preparing the specification, and do not have distinct meanings or roles in themselves. Additionally, in describing the embodiments disclosed in this specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed descriptions will be omitted. In addition, the attached drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the attached drawings, and all changes included in the spirit and technical scope of the present invention are not limited. , should be understood to include equivalents or substitutes.

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Meanwhile, the display device described in this specification is, for example, an intelligent display device that adds a computer support function to the broadcast reception function, and is faithful to the broadcast reception function while adding an Internet function, etc., such as a handwriting input device, a touch screen, or a space. It can be equipped with a more convenient interface such as a remote control. In addition, by supporting wired or wireless Internet functions, it is possible to connect to the Internet and a computer and perform functions such as email, web browsing, banking, or gaming. A standardized general-purpose OS can be used for these various functions.

Accordingly, in the display device described in the present invention, for example, various applications can be freely added or deleted on a general-purpose OS kernel, so various user-friendly functions can be performed. More specifically, the display device may be, for example, a network TV, HBBTV, smart TV, etc., and in some cases, may also be applied to a smartphone.

FIG. 2 is a block diagram for explaining each configuration of the display device 100. The display device 100 includes a broadcast reception unit 110, an external device interface unit 171, a network interface unit 172, a storage unit 140, a user input interface unit 173, an input unit 130, and a control unit 180. , may include a display module 150, an audio output unit 160, and/or a power supply unit 190.

The broadcast reception unit 110 may include a tuner unit 111 and a demodulation unit 112.

Meanwhile, unlike the drawing, the display device 100 includes only the external device interface unit 171 and the network interface unit 172 among the broadcast receiver 110, the external device interface unit 171, and the network interface unit 172. It is also possible to do so. That is, the display device 100 may not include the broadcast reception unit 110.

The tuner unit 111 may select a broadcast signal corresponding to a channel selected by the user or all previously stored channels among broadcast signals received through an antenna (not shown) or a cable (not shown). The tuner unit 111 can convert the selected broadcast signal into an intermediate frequency signal or a baseband video or audio signal.

For example, if the selected broadcast signal is a digital broadcast signal, the tuner unit 111 may convert it into a digital IF signal (DIF), and if the selected broadcast signal is an analog broadcast signal, it may be converted into an analog baseband video or audio signal (CVBS/SIF). That is, the tuner unit 111 can process digital broadcasting signals or analog broadcasting signals. The analog base band video or audio signal (CVBS/SIF) output from the tuner unit 111 may be directly input to the control unit 180.

Meanwhile, the tuner unit 111 can sequentially select broadcast signals of all broadcast channels stored through a channel memory function among received broadcast signals and convert them into intermediate frequency signals or baseband video or audio signals.

Meanwhile, the tuner unit 111 may be equipped with multiple tuners in order to receive broadcast signals of multiple channels. Alternatively, a single tuner that simultaneously receives broadcast signals from multiple channels is also possible.

The demodulator 112 may receive the digital IF signal (DIF) converted by the tuner unit 111 and perform a demodulation operation. The demodulator 112 may perform demodulation and channel decoding and then output a stream signal (TS). At this time, the stream signal may be a multiplexed video signal, audio signal, or data signal.

The stream signal output from the demodulator 112 may be input to the control unit 180. After performing demultiplexing and video/audio signal processing, the control unit 180 can output video through the display module 150 and audio through the audio output unit 160.

The sensing unit 120 refers to a device that detects changes within the display device 100 or external changes. For example, proximity sensor, illumination sensor, touch sensor, infrared sensor, ultrasonic sensor, optical sensor, e.g. , camera), a voice sensor (e.g., a microphone), a battery gauge, and an environmental sensor (e.g., a hygrometer, a thermometer, etc.).

The control unit 180 can check the status of the display device 100 based on the information collected by the sensing unit 120 and notify the user when a problem occurs or control it to maintain the best condition by adjusting it on its own.

In addition, the content, image quality, size, etc. of the image provided to the display module 150 can be controlled differently depending on the viewer detected by the sensing unit 120 or the ambient light level, etc. to provide an optimal viewing environment. As smart TVs advance, the number of functions mounted on the display device 100 increases and the number of sensing units 120 also increases.

The input unit 130 may be provided on one side of the main body of the display device 100. For example, the input unit 130 may include a touch pad, physical buttons, etc. The input unit 130 can receive various user commands related to the operation of the display device 100 and transmit control signals corresponding to the input commands to the control unit 180.

Recently, as the size of the bezel of the display device 100 has become smaller, the number of display devices 100 in which the input unit 130 in the form of a physical button exposed to the outside has been minimized has increased. Instead, a minimal physical button is located on the back or side, and user input can be received through the remote control device 200 through a touchpad or a user input interface unit 173, which will be described later.

The storage unit 140 may store programs for processing and controlling each signal in the control unit 180, or may store processed video, audio, or data signals. For example, the storage unit 140 stores application programs designed for the purpose of performing various tasks that can be processed by the control unit 180, and selects some of the stored application programs at the request of the control unit 180. can be provided.

Programs stored in the storage unit 140 are not particularly limited as long as they can be executed by the control unit 180. The storage unit 140 may perform a function for temporarily storing video, voice, or data signals received from an external device through the external device interface unit 171. The storage unit 140 can store information about a certain broadcast channel through a channel memory function such as a channel map.

Although FIG. 2 shows an embodiment in which the storage unit 140 is provided separately from the control unit 180, the scope of the present invention is not limited thereto, and the storage unit 140 may be included in the control unit 180.

The storage unit 140 includes volatile memory (e.g., DRAM, SRAM, SDRAM, etc.), non-volatile memory (e.g., flash memory, hard disk drive (HDD), and solid state drive (Solid- It may include at least one of state drive (SSD), etc.).

The display module 150 converts the video signal, data signal, OSD signal, and control signal processed by the control unit 180 or the video signal, data signal, and control signal received from the interface unit 171 to generate a driving signal. You can. The display module 150 may include a display panel 151 having a plurality of pixels.

A plurality of pixels provided in the display panel 151 may include RGB subpixels. Alternatively, a plurality of pixels provided in the display panel 151 may include RGBW subpixels. The display module 150 may convert image signals, data signals, OSD signals, control signals, etc. processed by the control unit 180 to generate driving signals for a plurality of pixels.

The display module 150 can be a plasma display panel (PDP), a liquid crystal display (LCD), an organic light emitting diode (OLED), a flexible display, etc., and can also be capable of a 3D display. It may be possible. The 3D display module 150 can be divided into a glasses-free type and a glasses type.

The display device 100 includes a display module 150 that occupies most of the front area and a case that covers the rear side of the display module 150 and packages the display module 150.

Recently, the display device 100 is a display module 150 that can be bent, such as LED (Light Emitting Diodes) or OLED (Organic Light Emitting Diodes), to implement a curved screen beyond a flat surface. can be used.

LCDs, which were mainly used in the past, received light through a backlight unit because it was difficult for the LCD to emit light on its own. The backlight unit is a device that uniformly supplies the light source and the light supplied from the light source to the liquid crystal located on the front. As the backlight unit became increasingly thinner, it was possible to implement a thin LCD, but it is difficult to implement the backlight unit using a flexible material, and when the backlight unit is bent, it is difficult to supply light uniformly to the liquid crystal, causing a problem in that the brightness of the screen changes.

On the other hand, in the case of LED or OLED, each element that makes up the pixel emits light on its own, so it can be implemented in a curved manner without using a backlight unit. In addition, since each element emits its own light, even if the positional relationship with neighboring elements changes, its own brightness is not affected, so the flexible display module 150 can be implemented using LED or OLED.

OLED (Organic Light Emitting Diode) panels appeared in earnest in the mid-2010s and are quickly replacing LCD in the small and medium-sized display market. OLED is a display made using a self-luminous phenomenon that emits light when a current flows through a fluorescent organic compound. The picture quality response speed is faster than that of LCD, so there is almost no afterimage when displaying a video.

OLED uses three types of phosphor organic compounds, including red, green, and blue, which have a self-luminous function. Electrons and positively charged particles injected from the cathode and anode are used to emit light. Since it is a light-emitting display product that utilizes the phenomenon of self-emitting light by combining within organic materials, there is no need for a backlight (halo device) that reduces color.

The LED (Light Emitting Diode) panel is a technology that uses one LED element as one pixel, and the size of the LED element can be reduced compared to the prior art, making it possible to implement a flexible display module 150. Previously, devices called LED TVs used LEDs as a light source for the backlight unit that supplied light to the LCD, but the LEDs themselves did not constitute a screen.

The display module 150 includes a display panel 151, a coupling magnet located on the back of the display panel 151, a first power supply unit, and a first signal module. The display panel 151 may include a plurality of pixels (R, G, and B). A plurality of pixels (R, G, B) may be formed in each area where a plurality of data lines and a plurality of gate lines intersect. A plurality of pixels (R, G, B) may be placed or arranged in a matrix form.

For example, the plurality of pixels (R, G, B) include a red (R) subpixel, a green (Green, 'G') subpixel, and a blue (Blue, 'B') subpixel. It can be included. The plurality of pixels (R, G, B) may further include a white (hereinafter referred to as 'W') subpixel.

The side of the display module 150 that displays images may be referred to as the front or front side. When the display module 150 displays an image, the side from which the image cannot be observed may be referred to as the rear or back side. Meanwhile, the display module 150 is composed of a touch screen and can be used as an input device in addition to an output device.

The audio output unit 160 receives the audio-processed signal from the control unit 180 and outputs it as audio.

The interface unit 170 serves as a passageway for various types of external devices connected to the display device 100. The interface unit may include a wired method of transmitting and receiving data through a cable as well as a wireless method using an antenna.

The interface unit 170 includes a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, and a port for connecting a device equipped with an identification module ( port), an audio input/output (I/O) port, a video input/output (I/O) port, and an earphone port.

An example of a wireless method may include the broadcasting receiver 110 described above, and may include not only broadcasting signals, but also mobile communication signals, short-distance communication signals, and wireless Internet signals.

The external device interface unit 171 can transmit or receive data with a connected external device. To this end, the external device interface unit 171 may include an A/V input/output unit (not shown).

The external device interface unit 171 can be connected wired/wireless to external devices such as DVD (Digital Versatile Disk), Blu ray, game device, camera, camcorder, computer (laptop), set-top box, etc. You can also perform input/output operations with external devices.

In addition, the external device interface unit 171 establishes a communication network with various remote control devices 200 to receive control signals related to the operation of the display device 100 from the remote control device 200 or to receive control signals related to the operation of the display device 100 from the remote control device 200. ) can be transmitted to the remote control device 200.

The external device interface unit 171 may include a wireless communication unit (not shown) for short-distance wireless communication with other electronic devices. Through this wireless communication unit (not shown), the external device interface unit 171 can exchange data with an adjacent mobile terminal. In particular, the external device interface unit 171 can receive device information, running application information, application images, etc. from the mobile terminal in mirroring mode.

The network interface unit 172 may provide an interface for connecting the display device 100 to a wired/wireless network including an Internet network. For example, the network interface unit 172 may receive content or data provided by the Internet or a content provider or network operator through a network. Meanwhile, the network interface unit 172 may include a communication module (not shown) for connection to a wired/wireless network.

The external device interface unit 171 and/or the network interface unit 172 supports Wi-Fi (Wireless Fidelity), Bluetooth, Bluetooth Low Energy (BLE), Zigbee, and NFC (Near Field Communication). ), communication modules for short-range communication such as LTE (long-term evolution), LTE-A (LTE Advance), CDMA (code division multiple access), WCDMA (wideband CDMA), UMTS (universal mobile telecommunications system), WiBro ( It may include a communication module for cellular communication such as Wireless Broadband).

The user input interface unit 173 may transmit a signal input by the user to the control unit 180 or transmit a signal from the control unit 180 to the user. For example, transmitting/receiving user input signals such as power on/off, channel selection, and screen settings from the remote control device 200, or local keys such as power key, channel key, volume key, and setting value (not shown). The user input signal input from the control unit 180 is transmitted to the control unit 180, the user input signal input from the sensor unit (not shown) that senses the user's gesture is transmitted to the control unit 180, or the signal from the control unit 180 is transmitted to the control unit 180. It can be transmitted to the sensor unit.

The control unit 180 may include at least one processor, and may control the overall operation of the display device 100 using the processor included therein. Here, the processor may be a general processor such as a central processing unit (CPU). Of course, the processor may be a dedicated device such as an ASIC or another hardware-based processor.

The control unit 180 demultiplexes a stream input through the tuner unit 111, the demodulator 112, the external device interface unit 171, or the network interface unit 172, or processes the demultiplexed signals, Signals for video or audio output can be generated and output.

The image signal processed by the control unit 180 may be input to the display module 150 and displayed as an image corresponding to the image signal. Additionally, the image signal processed by the control unit 180 may be input to an external output device through the external device interface unit 171.

The voice signal processed by the control unit 180 may be output as sound to the audio output unit 160. Additionally, the voice signal processed by the control unit 180 may be input to an external output device through the external device interface unit 171. Although not shown in FIG. 2, the control unit 180 may include a demultiplexer, an image processor, etc. This will be described later with reference to FIG. 3.

In addition, the control unit 180 may control overall operations within the display device 100. For example, the control unit 180 may control the tuner unit 111 to select (tuning) a broadcast corresponding to a channel selected by the user or a previously stored channel.

Additionally, the control unit 180 may control the display device 100 by a user command or internal program input through the user input interface unit 173. Meanwhile, the control unit 180 can control the display module 150 to display an image. At this time, the image displayed on the display module 150 may be a still image or a moving image, and may be a 2D image or 3D image.

Meanwhile, the control unit 180 can cause a certain 2D object to be displayed in the image displayed on the display module 150. For example, the object may be at least one of a connected web screen (newspaper, magazine, etc.), EPG (Electronic Program Guide), various menus, widgets, icons, still images, videos, and text.

Meanwhile, the control unit 180 may modulate and/or demodulate the signal using an amplitude shift keying (ASK) method. Here, the amplitude shift keying (ASK) method may refer to a method of modulating a signal by varying the amplitude of the carrier wave according to the data value, or restoring an analog signal to a digital data value according to the amplitude of the carrier wave.

For example, the control unit 180 may modulate an image signal using an amplitude shift keying (ASK) method and transmit it through a wireless communication module.

For example, the control unit 180 may demodulate and process an image signal received through a wireless communication module using an amplitude shift keying (ASK) method.

Through this, the display device 100 can easily transmit and receive signals with other video display devices placed adjacent to it, even without using a unique identifier such as a MAC address (Media Access Control Address) or a complex communication protocol such as TCP/IP. You can.

Meanwhile, the display device 100 may further include a photographing unit (not shown). The photography unit can photograph the user. The photographing unit can be implemented with one camera, but is not limited to this, and can also be implemented with a plurality of cameras. Meanwhile, the photographing unit may be embedded in the display device 100 on top of the display module 150 or may be placed separately. Image information captured by the photographing unit may be input to the control unit 180.

The control unit 180 may recognize the user's location based on the image captured by the photographing unit. For example, the control unit 180 may determine the distance (z-axis coordinate) between the user and the display device 100. In addition, the control unit 180 may determine the x-axis coordinate and y-axis coordinate within the display module 150 corresponding to the user's location.

The control unit 180 may detect the user's gesture based on each or a combination of images captured from the photographing unit or signals detected from the sensor unit.

The power supply unit 190 may supply corresponding power throughout the display device 100 . In particular, power is supplied to the control unit 180, which can be implemented in the form of a system on chip (SOC), the display module 150 for displaying images, and the audio output unit 160 for audio output. You can.

Specifically, the power supply unit 190 may include a converter (not shown) that converts AC power to DC power and a Dc/Dc converter (not shown) that converts the level of DC power.

Meanwhile, the power supply unit 190 receives power from the outside and serves to distribute power to each component. The power supply unit 190 may use a method of supplying AC power by directly connecting to an external power source, and may include a power supply unit 190 that includes a battery and can be used by charging.

In the former case, it is used by connecting a wired cable and is difficult to move or has a limited range of movement. In the latter case, it is free to move, but the weight and volume increase as much as the battery, and for charging, it must be connected directly to the power cable for a certain period of time or combined with a charging stand (not shown) that supplies power.

The charging holder can be connected to a display device through a terminal exposed to the outside, or the built-in battery can be charged when approached using a wireless method.

The remote control device 200 may transmit user input to the user input interface unit 173. For this purpose, the remote control device 200 may use Bluetooth, Radio Frequency (RF) communication, Infrared Radiation communication, Ultra-wideband (UWB), ZigBee, etc. In addition, the remote control device 200 may receive video, audio, or data signals output from the user input interface unit 173, and display them or output audio signals on the remote control device 200.

Meanwhile, the display device 100 described above may be a fixed or mobile digital broadcasting receiver capable of receiving digital broadcasting.

Meanwhile, the block diagram of the display device 100 shown in FIG. 2 is only a block diagram for an embodiment of the present invention, and each component of the block diagram is integrated according to the specifications of the display device 100 that is actually implemented. It may be added or omitted.

That is, as needed, two or more components may be combined into one component, or one component may be subdivided into two or more components. In addition, the functions performed by each block are for explaining embodiments of the present invention, and the specific operations or devices do not limit the scope of the present invention.

FIG. 3 is a front perspective view showing an example of the display device 100.

Referring to FIG. 3, the display device 100 includes a first long side (LS1), a second long side (LS2) opposite the first long side (LS1), a first long side (LS1), and It may have a rectangular body including a first short side (SS1) adjacent to the second long side (LS2) and a second short side (SS2) opposite the first short side (SS1). .

Here, the first short side area SS1 is referred to as the first side area, the second short side area SS2 is referred to as the second side area opposite the first side area, and the second short side area SS2 is referred to as the second side area opposite the first side area. 1 The long side area (LS1) is adjacent to the first and second side areas and is called the third side area located between the first and second side areas, and the second long side area is called the third side area. It is possible to refer to (LS2) as a fourth side area adjacent to the first and second side areas, located between the first and second side areas, and facing the third side area. do.

In addition, for convenience of explanation, the lengths of the first and second long sides (LS1, LS2) are shown and described as being longer than the lengths of the first and second short sides (SS1, SS2), but the first and second long sides (LS1, It may also be possible when the length of LS2) is approximately the same as the length of the first and second short sides (SS1 and SS2).

In addition, hereinafter, the first direction (First Direction, DR1) is a direction parallel to the long sides (LS1, LS2) of the display device 100, and the second direction (Second Direction, DR2) is a direction parallel to the long sides (LS1, LS2) of the display device 100. ) may be in a parallel direction to the Short Side (SS1, SS2). The third direction (DR3) may be a direction perpendicular to the first direction (DR1) and/or the second direction (DR2).

From another perspective, the side on which the display device 100 displays an image may be referred to as the front or front side. When the display device 100 displays an image, the side from which the image cannot be observed may be referred to as the rear or back side. When looking at the display device 100 from the front or front, the first long side LS1 may be referred to as the upper side or top surface. Likewise, the second long side LS2 may be referred to as the lower side or lower surface. Likewise, the first short side (SS1) can be called the right or right side, and the second short side (SS2) can be called the left or left side.

In addition, the first long side LS1, the second long side LS2, the first short side SS1, and the second short side SS2 may be referred to as edges of the display device 100. Additionally, the point where the first long side (LS1), the second long side (LS2), the first short side (SS1), and the second short side (SS2) meet each other may be called a corner. For example, the point where the first long side (LS1) and the first short side (SS1) meet is the first corner (C1), and the point where the first long side (LS1) and the second short side (SS2) meet is the second corner (C2) ), the point where the second short side (SS2) and the second long side (LS 2) meet is the third corner (C3), and the point where the second long side (LS2) and the first short side (SS1) meet is the fourth corner (C4) ) can be.

Here, the direction from the first short side (SS1) to the second short side (SS2) or from the second short side (SS2) to the first short side (SS1) can be referred to as the left-right direction (LR). The direction from the first long side LS1 to the second long side LS2 or from the second long side LS2 to the first long side LS1 may be referred to as the vertical direction UD.

Figure 4 is an exploded view of the display device 100 according to an embodiment of the present invention. The display device 100 includes a display module 150, a case top 101 that covers the front circumference of the display module 150 and surrounds the side circumference, a cover bottom 102 that covers the rear of the display module 150, and a cover. It may include a back cover 103 that covers the components mounted on the rear surface 102a of the bottom 102 and is coupled to the rear surface of the cover bottom 102.

Recently, as the display module 150 has become thinner, the housings 101 and 102 have also become thinner, and the thickness of the case top 101 constituting the bezel located around the front of the display module 150 can also be thinned or omitted. For example, in the case of an OLED panel, the backlight unit is omitted and the laterally exposed layered structure is simpler than that of the liquid crystal display panel, so the case top 101 can be omitted.

The display module 150 includes a display panel 151 on which images are output and a support panel 153 to support the rear surface, and the two members can be joined using an adhesive member 152 such as OCA.

The flexible board extending from the end of the display panel 151 can be bent toward the back to connect to the control board mounted on the cover bottom 102. When using a liquid crystal panel, the display panel 151 can be formed by seating the light source substrate, optical sheet, and liquid crystal panel in that order using a panel guide.

The display device 100, which is mounted on the wall, includes a structure (not shown) on the back of the display device 100 that is fastened to the wall, and the display device 100, which is mounted on the floor, extends to the lower part of the display module 150. It may include a stand 108.

FIG. 5 is a diagram to explain that when a slit 360 is formed in the cover shield 340, EMI noise is radiated through the slit 360. FIG. 6 is a diagram showing the cover shield 340 with the opening 350 and the area where EMI noise is radiated in the electronic device driving device 300 according to an embodiment of the present invention.

The electronic device driving device 300 of the present invention includes a printed circuit board 310, which is a timing controller. The main IC 320 and memory 330 are mounted on the upper surface of the printed circuit board 310.

The main IC 320 is an electronic component that integrates many elements into one chip to process signals. And the memory 330 mounted on the upper surface of the printed circuit board 310 adjacent to the main IC 320 may be a double data rate (DDR) memory 330.

Recently, as the circuit operating frequency has increased, the clock frequency for devices that exchange data with the memory 330 has increased, and the need to read data from the memory 330 with a very high bandwidth is gradually increasing. And the DDR memory 330 operates at a relatively high clock speed and transmits data during two transitions of the clock cycle.

The DDR memory 330 of the present invention can use a clock frequency of 1,032 MHz or 1,056 MHz. As the high-frequency DDR memory 330 is used, the highest EMI noise occurs between the main IC 320 and the memory 330 mounted on the top of the printed circuit board 310.

Conventionally, in order to reduce EMI noise, as shown in FIG. 1, a separate conductive member 256 to shield electromagnetic waves is installed between the printed circuit board 250 and the shield case 260, or a screw 269 is fastened. EMI noise was reduced by expanding the ground area. However, in this case, there is a problem that separate manufacturing costs or additional manufacturing processes are required to install the conductive member 256, and there is a problem that there is a deviation in EMI noise reduction due to fastening of the screw 269.

Accordingly, the purpose of the electronic device driving device 300 of the present invention is to consider a method for more stably reducing EMI noise without the use of additional materials.

FIG. 5 is a diagram to explain that EMI noise is radiated through the slit 360 of the cover shield 340 that covers the upper surface of the printed circuit board 310, and (a) in FIG. This is a diagram showing the case where the slit 360 is formed, and Figure 5(b) is a diagram showing the area where EMI noise is radiated.

EMI noise generated between the main IC 320 and the memory 330 is reflected by the cover shield 340 that covers the top surface of the printed circuit board 310 and is amplified as overlap occurs. And the amplified EMI noise is conducted between the printed circuit board 310 and the cover shield 340. Since the higher the frequency, the greater the straightness, the amplified EMI noise is radiated through the slit 360 of the cover shield 340. Additionally, because the length of the slit 360 acts as an antenna for EMI noise radiation, there is a problem that the level of EMI noise radiated varies depending on the length of the slit 360.

To solve this problem, the electronic device driving device 300 of the present invention corresponds to the memory 330 in the cover shield 340 that covers the upper surface of the printed circuit board 310, as shown in (a) of FIG. An opening 350 is formed at the position. Additionally, the opening 350 is formed so that the main IC 320 is not exposed, and the size of the opening 350 is formed to be larger than the size of the memory 330.

Through this, the EMI noise generated between the main IC 320 and the memory 330 is reflected on the cover shield 340, overlaps, and is freely radiated as the original EMI noise through the opening 350 before being amplified, thereby reducing the EMI noise. can be reduced.

Additionally, in the electronic device driving device 300 of the present invention, a plurality of memories 330 adjacent to the main IC 320 may be mounted on the upper surface of the printed circuit board 310 for faster data processing. In this case, EMI noise occurs between the main IC 320 and the plurality of memories 330. Likewise, in order for EMI noise to be freely radiated without being reflected on the cover shield 340, a number of openings 350 corresponding to the number of memories 330 may be formed in the cover shield 340.

In addition to the main IC 320 and the memory 330, other electronic components may be mounted on the upper surface of the printed circuit board 310 adjacent to the main IC 320 and the memory 330. In this case, the opening 350 needs to be formed so that other electronic components are not exposed. For this reason, the plurality of openings 350 formed in the cover shield 340 may be formed in different sizes.

FIG. 7 shows data on EMI noise when a slit 360 is formed in the cover shield 340 of FIG. 5. FIG. 8 shows data on EMI noise when an opening 350 is formed in the cover shield 340 in the electronic device driving device 300 according to an embodiment of the present invention.

This data shows that DDR memory 330 using clock frequencies of 1,032 MHz and 1,056 MHz, respectively, is mounted on both sides of the main IC 320 on the printed circuit board 310 and covers the upper surface of the printed circuit board 310. This is data measuring EMI noise for the case where the slit 360 is formed and the case where the opening 350 is formed in the cover shield 340.

In the graphs of FIGS. 7 and 8, the horizontal axis represents frequency (MHz), and the vertical axis represents EMI noise level (dBμV/m). And the table shown in FIGS. 7 and 8 is a table measuring the Margin Peak and Margin Average in a frequency band twice the 1,032 MHz and 1,056 MHz clock frequency of the DDR memory 330.

Comparing the graphs and tables shown in FIGS. 7 and 8, in a frequency band twice the clock frequency of the DDR memory 330, the slit 360 is formed in the cover shield 340, compared to the case of forming the slit 360 in the cover shield 340. Depending on the embodiment, it can be seen that the EMI noise level is lower when the opening 350 is formed in the cover shield 340.

When the slit 360 is formed in the cover shield 340, the Margin Peak is 4.9 dBμV/m and 8.2 dBμV/m in a frequency band twice the clock frequency of the DDR memory 330, and the Margin Average is 14.1 dBμV/m. m, which is 13.7 dBμV/m. On the other hand, when the opening 350 is formed in the cover shield 340 according to an embodiment of the present invention, the margin peak is 12.6 dBμV/m and 11.3 dBμV/m in a frequency band twice the clock frequency of the DDR memory 330. m, and Margin Average is 17.8 dBμV/m and 15.7 dBμV/m.

Through this, experiments have shown that when the opening 350 is formed at a position corresponding to the memory 330 in the cover shield 340 that covers the upper surface of the printed circuit board 310, a sufficient EMI margin can be secured. You can check it.

Therefore, the electronic device driving device 300 of the present invention forms an opening 350 in the cover shield 340 at a position corresponding to the memory 330, thereby freeing the original EMI noise before the EMI noise is overlapped and amplified. It has the effect of reducing EMI noise by radiating it.

Additionally, the electronic device driving device 300 according to an embodiment of the present invention may form a gap separating the cover shield 340 and the printed circuit board 310. High temperature heat is generated in the printed circuit board 310 according to the operation of the main IC 320 and memory 330 mounted on the upper surface of the printed circuit board 310, and the cover shield 340 and the printed circuit board ( By forming a gap so that 310 does not come into direct contact, heat can be released through the opening 350 formed in the cover shield 340.

In addition, the cover shield 340 may be made of metal, or its outer surface may be plated with metal, thereby absorbing high temperature heat generated from the printed circuit board 310 or conducting heat to the cover shield 340. can do.

Additionally, the electronic device of the present invention may include an Organic Light Emitting Diodes (OLED) TV. In particular, recent OLED TVs require larger displays, higher brightness, and higher response speeds, so there are problems with EMI noise and internal heat that reduces the product's lifespan. Accordingly, the above problems can be solved by reducing EMI noise and solving the internal heat problem using the electronic device driving device 300 of the present invention.

The above detailed description should not be construed as restrictive in any respect and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

100: display device
101: Case top
102: cover bottom
103: back cover
110: Broadcast reception unit
120: sensing unit
130: input unit
140: storage unit
150: display module
151: display panel
160: audio output unit
170: interface unit
171: External device interface unit
172: Network interface unit
173: Equipment used interface unit
180: control unit
190: power supply unit
200: Remote control device.
300: Electronic device driving device
310: printed circuit board
320: Main IC
330: memory
340: cover shield
350: opening
360: slit

Claims (8)

A printed circuit board on which the main IC and memory are mounted on the top; and
Includes a cover shield covering the upper surface of the printed circuit board,
The cover shield is,
An opening is formed at a location corresponding to the memory,
The opening is
Formed so that the main IC is not exposed,
An electronic device driving device larger than the size of the memory. According to paragraph 1,
The memory is,
A plurality of them are mounted adjacent to the main IC,
The opening is
An electronic device driving device, characterized in that the number of memories corresponds to the number of memories. According to paragraph 2,
Further comprising at least one electronic component mounted adjacent to the main IC and the memory,
The plurality of openings are,
An electronic device driving device, characterized in that it is formed so that the electronic components are not exposed. According to paragraph 1,
The cover shield is,
An electronic device driving device, characterized in that it is spaced apart from the printed circuit board to form a gap. According to paragraph 1,
The cover shield is,
An electronic device drive device made of metal or having an external surface plated with metal. According to paragraph 1,
The electronic device is,
An electronic device driving device comprising an OLED TV. display panel;
A printed circuit board that provides a driving signal to the display panel and has a main IC and memory mounted on the top surface; and
Includes a cover shield covering the upper surface of the printed circuit board,
The cover shield is,
An opening is formed at a location corresponding to the memory,
The opening is
Formed so that the main IC is not exposed,
A display device larger than the size of the memory. In clause 7,
The memory is,
A plurality of them are mounted adjacent to the main IC,
The opening is
A display device characterized in that the number of memories corresponds to the number of memories.