WO2015079480A1 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- WO2015079480A1 WO2015079480A1 PCT/JP2013/081720 JP2013081720W WO2015079480A1 WO 2015079480 A1 WO2015079480 A1 WO 2015079480A1 JP 2013081720 W JP2013081720 W JP 2013081720W WO 2015079480 A1 WO2015079480 A1 WO 2015079480A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fastening
- display device
- chassis
- bezel
- panel
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/13332—Front frames
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133334—Electromagnetic shields
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/46—Fixing elements
Definitions
- the present invention relates to a display device in which a bezel that is in contact with a peripheral edge of one surface of a display panel and a chassis that holds the display panel from the other surface are fastened with screws.
- Display devices such as liquid crystal displays and liquid crystal televisions are widely used.
- the display device includes a display panel having a display surface for displaying an image on one surface.
- a bezel that is in contact with the periphery of the display surface from one side of the display panel and a chassis that holds the display panel from the other side are fastened with screws to form a casing.
- the display device performs various signal processing when displaying an image on the display panel, and an electronic circuit for performing various signal processing and a printed circuit board on which the electronic circuit is mounted are arranged at appropriate positions in the housing. Yes.
- a casing composed of a bezel and a chassis is often made of metal.
- the number of pixels has increased with the increase in screen size and image quality, and multiple functions such as a double-speed display function or a quadruple-speed display function in which an interpolation frame is added between each video frame for display.
- the number of signals to be processed by the display device is increasing, and the processing speed of signal processing by the display device is increased.
- a signal is transmitted at high speed with a wiring pattern formed on the printed circuit board, harmonics are generated and leak as a noise current from the printed circuit board (wiring pattern).
- the noise current reaches the bezel or chassis, the bezel or chassis serves as an antenna, and electromagnetic noise is radiated to the outside of the display device.
- the frequency of the electromagnetic wave noise matches the resonance frequency of the bezel or chassis, the radiation amount of the electromagnetic wave noise increases.
- Patent Document 1 proposes a configuration in which a washer having a lower electrical conductivity than the bezel and chassis is interposed between the bezel or chassis and the screw. In such a configuration, even if noise current is conducted from the printed board to the bezel or chassis and electromagnetic resonance occurs, the resonance energy is converted into heat energy by the washer and consumed, so EMI is reduced. Can be suppressed.
- An object of the invention is to provide a display device capable of suppressing EMI by adjusting the resonance frequency in the housing.
- a display device includes a display panel having a display area for displaying an image on one side, a holding body that holds the display panel from the other side, and a frame that is in contact with a peripheral portion of the one side of the display panel. And a plurality of fastening members for fastening the holding body and the frame body, the fastening member includes a plurality of types of fastening members having different electric resistance values.
- the holding body that holds the display panel having the display area on one side from the other side and the frame body that abuts on the peripheral edge of the one side of the display panel are fastened by the plurality of fastening members.
- a plurality of fastening members a plurality of types of fastening members having different electric resistance values are used in combination.
- the resonance frequency in the casing configured by fastening the holding body and the frame body with the fastening member is influenced not only by the holding body and the frame body but also by the electrical resistance value of the fastening member.
- an electrical device such as a display device has a different resonance frequency depending on a component (printed circuit board or the like) housed in a housing, a combination of components, an arrangement position, and the like. Also in such an electric device, by selecting the electric resistance value of each fastening member to be used, the resonance frequency can be finely adjusted and the adjustable range is expanded. Therefore, EMI is suppressed by using a fastening member suitable for each display device, regardless of the configuration of the display device.
- the display device according to the present invention is characterized in that the plurality of types of fastening members are formed of different materials.
- a plurality of types of fastening members having different electrical resistance values are realized by fastening members formed of different materials. Therefore, fastening members having various electric resistance values can be realized depending on the material used.
- the fastening members are provided at a plurality of locations along the frame body, and the types of fastening members at each location on one end side of the frame body are different from the fastening members at other locations. It is characterized by being different from the type.
- the holding body and the frame are fastened by the fastening members at a plurality of locations along the frame.
- the kind of fastening member which fastens each location of the one end side of a frame differs from the kind of fastening member which fastens another location.
- EMI electromagnetic wave noise
- the display device is characterized in that the holding body and the frame are formed of a conductive member.
- the present invention it is possible to realize a configuration capable of suppressing EMI in a display device in which the holding body and the frame body are formed of conductive members.
- the resonance frequency in the housing can be adjusted, and EMI can be suppressed.
- the fastening strength is not lowered by the fastening member, and the fastening is performed because no washer is interposed. The effect that the part which a member protrudes from a frame or a holding body can be comprised short is acquired.
- FIG. 3 is a transverse sectional view taken along line III-III in FIG. 1.
- It is a schematic diagram which shows the example of the combination of a some fastening member. It is a graph which shows the radiation
- FIG. 1 is a front view of a display device according to the present embodiment
- FIG. 2 is an exploded perspective view showing a configuration of a main part of the display device according to the present embodiment
- FIG. 3 is a cross-section taken along line III-III in FIG. FIG.
- the display device of this embodiment includes a bezel (frame body) 2, a liquid crystal panel (display panel) 3, a panel chassis 4, a light guide plate 5 and a light source unit 6, a backlight chassis (hereinafter referred to as a BL chassis).
- the holders 7) are stacked in this order and fastened with a plurality of fastening members (screws) 1.
- the bezel 2 is a metal rectangular frame (conductive member), and has a plate portion 21 that protrudes vertically from an outer peripheral edge. Further, the bezel 2 is provided with a panel holding portion 22 (see FIG. 3) that contacts the liquid crystal panel 3 as will be described later along the opening on the surface on the projecting side of the plate portion 21. A plurality of through holes 20 are provided on the outside.
- the liquid crystal panel 3 is a rectangular liquid crystal display panel, and has a rectangular display screen (display area) for displaying an image on one side.
- the panel chassis 4 is a rectangular frame made of resin, and is provided with a plurality of through holes 40 penetrating in the thickness direction.
- the panel chassis 4 is slightly smaller than the bezel 2, and the through hole 40 is provided at a position corresponding to the through hole 20 of the bezel 2.
- the through holes 20 and 40 are provided at equal intervals of 3 on the short side and 5 on the long side, but the number of the through holes 20 and 40 is not limited thereto.
- the distances between the adjacent through holes 20, 20 and 40, 40 are not limited to equal intervals.
- the panel chassis 4 has a plate portion 41 provided so as to project inwardly from the inner peripheral surface, and the liquid crystal panel 3 as described later is formed on one surface of the plate portion 41 along the opening.
- a panel holding portion 42 (see FIG. 3) is provided.
- a sheet holding portion 43 (see FIG. 3) that contacts the optical sheet 51 provided on one surface of the light guide plate 5 is provided on the back side of the panel holding portion 42 of the plate portion 41.
- the light guide plate 5 is made of a synthetic resin such as highly transparent acrylic resin or polycarbonate resin, and is formed in a rectangular plate shape.
- An optical sheet 51 is attached to one surface of the light guide plate 5, and a reflective sheet 52 is attached to the other surface.
- the reflection sheet 52 is a synthetic resin sheet having high reflectivity.
- the optical sheet 51 is a sheet in which, for example, a diffusion sheet, a prism sheet, a polarizing sheet, and the like are laminated.
- the diffusion sheet is, for example, a PET (polyethylene terephthalate) film or a polycarbonate resin film, and has a function of diffusing incident light.
- the prism sheet is configured, for example, by forming a regular prism pattern with acrylic resin on one side of a polyester sheet material.
- the polarizing sheet is, for example, a polyethylene naphthalate film, and has a function of converting incident light into linearly polarized light.
- the optical sheet 51 is not limited to be configured to be attached to one surface of the light guide plate 5, and may be configured to be held at an appropriate interval from one surface of the light guide plate 5.
- the light source unit 6 includes a strip-shaped substrate 61 and a plurality of light sources 60 mounted on one surface of the substrate 61.
- the light source 60 is, for example, a light emitting diode (LED), and is mounted side by side in the longitudinal direction of the substrate 61.
- the light source unit 6 may be configured to use a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), a hot cathode fluorescent lamp (HCFL), or the like.
- the light source unit 6 is disposed so as to face the lower end surface of the light guide plate 5 so that light from the light source 60 is incident thereon, for example.
- the two light source parts 6 may be provided, and when the two light source parts 6 are provided, for example, they may be arranged opposite to the left and right end faces of the light guide plate 5, respectively, and may be arranged opposite to the upper and lower end faces.
- the BL chassis 7 is a metal member (conductive member) having a rectangular dish shape, and a flange 71 projecting outward is provided around the opening.
- the flange 71 has a plurality of protrusions 72 (see FIG. 3) protruding from the opening side of the BL chassis 7, and each protrusion 72 is provided with a screw hole 70 having a screw on its inner periphery. It is.
- the outer diameter of the flange portion 71 of the BL chassis 7 is substantially the same as the outer diameter of the panel chassis 4, and the convex portion 72 is provided at a position corresponding to the through hole 40 of the panel chassis 4 and the through hole 20 of the bezel 2. is there. Therefore, the number of convex portions 72 is not limited to the number shown in FIG.
- the light guide plate 5 is placed on the bottom plate of the BL chassis 7, the panel chassis 4 is placed thereon, and the liquid crystal panel 3 is placed on the panel chassis 4. Then, the bezel 2 is put on the bezel 2, and the bezel 2, the panel chassis 4 and the BL chassis 7 are fastened by the fastening member 1.
- the light source unit 6 is attached to the bottom plate of the BL chassis 7 at a position facing the lower end surface of the light guide plate 5.
- the bezel 2 covers the liquid crystal panel 3 from the display screen side by bringing the panel holding portion 22 into contact with the peripheral edge of the display screen of the liquid crystal panel 3.
- the liquid crystal panel 3 has an outer diameter that is approximately the same as or slightly larger than the outer diameter of the panel holding portion 22 of the bezel 2. Do not overlap.
- the panel chassis 4 is located inside the plate portion 21 of the bezel 2 in a state where the through-hole 40 of the panel chassis 4 is continuous with the through-hole 20 of the bezel 2.
- the panel holding portion 42 of the panel chassis 4 is in contact with the back surface side of the liquid crystal panel 3 where the panel holding portion 42 is in contact with the panel holding portion 22 of the bezel 2.
- the light guide plate 5 is disposed with the optical sheet 51 facing the back surface (the back surface of the display screen) of the liquid crystal panel 2 in contact with the panel holding portion 42 of the panel chassis 4, and the periphery of the optical sheet 51 is the sheet holding plate of the panel chassis 4. It contacts the part 43.
- the bottom plate of the BL chassis 8 is brought into contact with the reflection sheet 52 in a state where the optical sheet 51 is in contact with the sheet holding portion 43 of the panel chassis 4.
- the light source part 6 is provided at a position facing the lower end surface of the light guide plate 5.
- the flange portion 71 of the BL chassis 7 has a lower end surface of the panel chassis 4 in a state where the screw holes 70 of the convex portions 72 are connected to the through holes 40 of the panel chassis 4. Abut.
- the fastening member 1 is passed through the through hole 20 of the bezel 2 and the through hole 40 of the panel chassis 4 from the display screen side of the display device, and is screwed into the screw hole 70 of the BL chassis 7, so that the bezel 2, the panel chassis 4 and the BL
- the chassis 7 is fastened.
- the BL chassis 7 sandwiches the light guide plate 5 with the panel chassis 4 and holds the light source unit 6, and the bezel 2 sandwiches the liquid crystal panel 3 with the panel chassis 4.
- the light emitted from the light source unit 6 enters the light guide plate 5 from the lower end surface and is reflected by the reflective sheet 52, and then the light guide plate 5 and the optical sheet. 51 passes through the liquid crystal panel 3 as uniform plane light.
- FIG. 4 is a schematic diagram illustrating an example of a combination of a plurality of fastening members 1.
- each of the long sides of the bezel 2 has five fastening points with a distance D1
- each of the short sides has three fastening points with a distance D2. is there.
- the fastening member 1a and the fastening member 1b have different electrical resistance values
- the fastening member 1a is formed of a material having an electrical resistivity of 10 ⁇ cm, for example
- the fastening member 1b is a material having an electrical resistivity of 0.01 ⁇ cm, for example. It is formed by. Since the fastening members 1a and 1b are formed in the same shape with materials having different electrical resistivity (that is, different materials), the electrical resistance values of the fastening members 1a and 1b are different.
- the bezel 2, the panel chassis 4 and the BL chassis 7 are fastened by the fastening members 1a and 1b, so that the bezel 2 and the BL chassis 7 constitute a casing of the display device.
- the resonance frequency in the casing composed of the bezel 2 and the BL chassis 7 is also affected by the electrical resistance values of the fastening members 1a and 1b. Therefore, the resonant frequency in a housing
- casing can be adjusted by changing fastening member 1a, 1b attached to each fastening location. Therefore, the EMI from the display device can be suppressed by determining the fastening members 1a and 1b attached to the respective fastening locations so that the resonance frequency of the housing does not match the frequency of the electromagnetic noise radiated from the display device.
- the fastening members 1a and 1b attached to the respective fastening locations measure electromagnetic wave noise emitted when the assembled display device is operated (test operation), and be determined according to the measured electromagnetic wave noise.
- the resonance frequency in the housing is also affected by the distance between the adjacent fastening members 1a and 1b (distance between fastening points). Therefore, the electromagnetic wave noise radiated from the actually assembled display device includes the influence due to the distance between the adjacent fastening members 1a and 1b, and the fastening members 1a and 1b are set according to the measured electromagnetic wave noise. By determining, a configuration capable of suppressing EMI can be realized.
- the measurement of electromagnetic wave noise and determination of the combination of the fastening members 1a and 1b may be performed once for one model, and the same combination of fastening members 1a and 1b is used for the display device of the same model.
- EMI can be suppressed.
- FIGS. 5A and 5B are graphs showing the radiation amount of electromagnetic noise from the display device.
- FIG. 5A shows the radiation amount of electromagnetic noise from the display device using the fastening members 1a and 1b as shown in FIG.
- FIG. 5B shows the radiation amount of electromagnetic noise from the display device using the fastening member 1a at all fastening locations.
- the horizontal axis indicates the frequency [MHz]
- the vertical axis indicates the electric field strength value [dB ⁇ V / m] indicating the radiation amount of the electromagnetic wave noise.
- a solid line indicates a value (specified level) defined by, for example, an EMC (Electro-Magnetic Compatibility) standard, and a broken line indicates a design target value.
- EMC Electro-Magnetic Compatibility
- the design target value is generally set with a margin of several dB ⁇ V / m (for example, 6 dB ⁇ V / m) with respect to a specified level.
- FIG. 5B in the display device using the fastening members 1a at all fastening locations, electromagnetic noise exceeding the design target value is radiated at a frequency of about 550 MHz.
- FIG. 5A in the display device using the fastening members 1b at the four locations in the center of each side of the bezel 2 and using the fastening members 1a at other locations, the electromagnetic noise exceeding the design target value is generated. Radiation is suppressed.
- the fastening members 1a and 1b having different electric resistance values are prepared in advance, and the fastening member 1 to be attached to each fastening portion is appropriately selected from the fastening members 1a and 1b and used. Fine adjustment of the resonance frequency of the housing is possible. In addition, since the adjustable range is widened, it is possible to realize a configuration capable of suppressing EMI regardless of the configuration of the display device.
- the fastening members 1a and 1b are not limited to two types, and can be appropriately selected from three or more types of fastening members 1 having different electric resistance values. Since the fastening members 1 a and 1 b are formed in the same screw shape, they can be screwed into any of the through holes 20 and 40 and the screw hole 70.
- fastening members 1a and 1b may be configured in different colors.
- the fastening members 1a and 1b having the same shape can be identified by the color, so that it is possible to avoid erroneous attachment of the fastening members 1a and 1b.
- the fastening member 1 attached to each fastening portion is the fastening members 1a and 1b having different electric resistance values, thereby realizing a configuration for adjusting the resonance frequency of the housing and suppressing EMI. Yes.
- the fastening member 1a, 1b does not arise.
- the protruding portions (heads) of the fastening members 1a and 1b on the front surface of the bezel 2 can be configured to be short, and the design can be improved.
- FIG. 6A is a schematic diagram for explaining a method of measuring electromagnetic noise radiated from the display device.
- a display device is installed with the display screen upright, and a measurement antenna for measuring the intensity (radiation amount) of electromagnetic waves is installed at a position about several meters (for example, 3 m) away from the display screen. Then, the display device is operated, and electromagnetic wave noise radiated from the display device is measured by the measurement antenna while sequentially changing the direction of the display device in the direction indicated by an arrow in FIG. 6A.
- a measurement antenna for measuring the intensity (radiation amount) of electromagnetic waves is installed at a position about several meters (for example, 3 m) away from the display screen.
- the display device is operated, and electromagnetic wave noise radiated from the display device is measured by the measurement antenna while sequentially changing the direction of the display device in the direction indicated by an arrow in FIG. 6A.
- FIG. 6A the display device is rotated in the clockwise direction when the display device is viewed from above (the display orientation is changed).
- FIG. 6B is an intensity distribution diagram of electromagnetic noise, and shows an example of an intensity distribution of electromagnetic noise measured by the method shown in FIG. 6A for a display device in which all fastening portions are fastened by the fastening member 1a.
- the circumferential direction of the circle indicated by the broken line indicates the rotation angle ⁇ of the display device, and the radial direction from the center of the circle indicates the electric field strength value indicating the radiation amount of electromagnetic noise.
- FIG. 6C is a schematic diagram illustrating an example of a combination of a plurality of fastening members 1.
- FIG. 6D is an improved electromagnetic wave noise intensity distribution diagram, and shows the radiation amount of electromagnetic wave noise from the display device using the fastening members 1a and 1b as shown in FIG.
- EMI is improved when the rotation angle ⁇ of the display device is about 45 °. Therefore, in the case of a display device that emits electromagnetic noise as shown in FIG. 6B, by fastening the fastening portion of the short side on the right side of the bezel 2 with a fastening member 1b different from the other fastening portions (fastening member 1a), EMI can be suppressed as shown in FIG. 6D.
- FIG. 7A is a schematic diagram for explaining a method of measuring electromagnetic noise radiated from the display device.
- a display device is installed with the display screen upright, and a measurement antenna that measures the intensity (radiation amount) of electromagnetic waves at a position about several meters (for example, 3 m) away from the display screen Install. Then, the display device is operated, and electromagnetic noise radiated from the display device is measured by the measurement antenna while sequentially changing the direction of the display device in the direction indicated by the arrow in FIG. 7A.
- a measurement antenna that measures the intensity (radiation amount) of electromagnetic waves at a position about several meters (for example, 3 m) away from the display screen Install.
- FIG. 7A the display device is rotated in the counterclockwise direction when the display device is viewed from above (the display orientation is changed).
- FIG. 7B is an intensity distribution diagram of electromagnetic noise, and shows an example of the intensity distribution of electromagnetic noise measured by the method shown in FIG. 7A for a display device in which all fastening portions are fastened by the fastening member 1a.
- the circumferential direction of the circle indicated by the broken line indicates the rotation angle ⁇ of the display device, and the radial direction from the center of the circle indicates the electric field strength value indicating the radiation amount of electromagnetic noise.
- FIG. 7B when the rotation angle ⁇ is about 45 °, that is, when the left side of the display screen is closer to the measurement antenna than the right side as shown in FIG. (EMI worsens).
- FIG. 7C the three fastening points provided on the left short side of the bezel 2 are fastened by the fastening member 1b, and the other parts are fastened by the fastening member 1a.
- FIG. 7C is a schematic diagram illustrating an example of a combination of a plurality of fastening members 1.
- FIG. 7D is an improved electromagnetic wave noise intensity distribution diagram, and shows the radiation amount of electromagnetic wave noise from the display device using the fastening members 1a and 1b as shown in FIG. 7C.
- EMI is improved when the rotation angle ⁇ of the display device is about 45 °. Therefore, in the case of a display device that emits electromagnetic noise as shown in FIG. 7B, by fastening the fastening portion on the short side on the left side of the bezel 2 with a fastening member 1b different from other fastening portions (fastening member 1a), EMI can be suppressed as shown in FIG. 7D.
- the display device according to the present invention has been described by taking a display device having an edge light type light source device as an example, but the present invention can also be applied to a display device having a direct type light source device.
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Abstract
Description
液晶パネル3は、矩形状の液晶表示パネルであり、画像を表示する矩形状の表示画面(表示領域)を一面に有する。
光源部6は、例えば導光板5の下端面に光源60からの光が入射するように対向配置されている。なお、光源部6は、2つ備えてもよく、2つ備える場合、例えば、導光板5の左右端面にそれぞれ対向配置してもよく、上下端面にそれぞれ対向配置してもよい。
パネルシャーシ4は、ベゼル2の貫通孔20に自身の貫通孔40が連なる状態でベゼル2の板部21の内側に位置する。パネルシャーシ4のパネル抑え部42は、液晶パネル3において、ベゼル2のパネル抑え部22に当接する箇所の裏面側に当接する。
上述した構成により、本実施形態の表示装置では、光源部6(光源60)から出射した光は、導光板5に下端面から入射し、反射シート52に反射した後、導光板5及び光学シート51を通過し、均一な平面光として液晶パネル3に照射される。
図5Bに示すように、全ての締結箇所に締結部材1aを用いた表示装置では、周波数が約550MHzで設計目標値を超える電磁波ノイズが放射されている。これに対して、図5Aに示すように、ベゼル2の各辺中央の4箇所に締結部材1bを用い、他の箇所に締結部材1aを用いた表示装置では、設計目標値を超える電磁波ノイズの放射が抑制されている。
2 ベゼル(枠体)
3 液晶パネル(表示パネル)
4 パネルシャーシ
5 導光板
6 光源部
7 BLシャーシ(保持体)
Claims (4)
- 画像を表示する表示領域を一面に有する表示パネルと、該表示パネルを他面側から保持する保持体と、前記表示パネルの前記一面の周縁部に当接する枠体と、前記保持体及び枠体を締結する複数の締結部材とを備える表示装置において、
前記締結部材は、電気抵抗値が異なる複数種類の締結部材を含むことを特徴とする表示装置。 - 前記複数種類の締結部材は、それぞれ異なる材質で形成されていることを特徴とする請求項1に記載の表示装置。
- 前記締結部材は、前記枠体に沿って複数箇所にそれぞれ設けてあり、
前記枠体の一端側の各箇所の締結部材の種類が、他の箇所の締結部材の種類とは異なることを特徴とする請求項1又は2に記載の表示装置。 - 前記保持体及び枠体は導電性の部材にて形成されていることを特徴とする請求項1から3までのいずれかひとつに記載の表示装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/038,241 US9880410B2 (en) | 2013-11-26 | 2013-11-26 | Display apparatus |
CN201380081214.XA CN105814477B (zh) | 2013-11-26 | 2013-11-26 | 显示装置 |
PCT/JP2013/081720 WO2015079480A1 (ja) | 2013-11-26 | 2013-11-26 | 表示装置 |
JP2015550219A JP6224126B2 (ja) | 2013-11-26 | 2013-11-26 | 表示装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2013/081720 WO2015079480A1 (ja) | 2013-11-26 | 2013-11-26 | 表示装置 |
Publications (1)
Publication Number | Publication Date |
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WO2015079480A1 true WO2015079480A1 (ja) | 2015-06-04 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2013/081720 WO2015079480A1 (ja) | 2013-11-26 | 2013-11-26 | 表示装置 |
Country Status (4)
Country | Link |
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US (1) | US9880410B2 (ja) |
JP (1) | JP6224126B2 (ja) |
CN (1) | CN105814477B (ja) |
WO (1) | WO2015079480A1 (ja) |
Families Citing this family (1)
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KR102612785B1 (ko) * | 2018-12-20 | 2023-12-13 | 엘지전자 주식회사 | 디스플레이 디바이스 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11259002A (ja) * | 1998-03-13 | 1999-09-24 | Toshiba Electronic Engineering Corp | 平面表示装置、及び、その取付構造 |
JP2010266812A (ja) * | 2009-05-18 | 2010-11-25 | Sharp Corp | 表示装置 |
JP2013164618A (ja) * | 2012-01-12 | 2013-08-22 | Sharp Corp | 表示装置およびテレビジョン受像機 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4081448B2 (ja) * | 2004-01-14 | 2008-04-23 | シャープ株式会社 | 液晶表示装置 |
JP4036228B2 (ja) * | 2005-06-20 | 2008-01-23 | 船井電機株式会社 | 液晶表示装置 |
JP5278391B2 (ja) | 2010-07-16 | 2013-09-04 | 株式会社デンソー | 電解リン酸塩化成処理方法 |
JP2012027203A (ja) * | 2010-07-22 | 2012-02-09 | Sharp Corp | 電子機器および表示装置 |
US20130141943A1 (en) * | 2011-12-01 | 2013-06-06 | Yajun Yu | Slim Bezel Backlight Module of Liquid Crystal Display Device |
JP5259004B1 (ja) * | 2012-01-12 | 2013-08-07 | シャープ株式会社 | 表示装置およびテレビジョン受像機 |
JP2014154931A (ja) * | 2013-02-05 | 2014-08-25 | Funai Electric Co Ltd | 表示装置 |
-
2013
- 2013-11-26 CN CN201380081214.XA patent/CN105814477B/zh not_active Expired - Fee Related
- 2013-11-26 US US15/038,241 patent/US9880410B2/en not_active Expired - Fee Related
- 2013-11-26 JP JP2015550219A patent/JP6224126B2/ja not_active Expired - Fee Related
- 2013-11-26 WO PCT/JP2013/081720 patent/WO2015079480A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11259002A (ja) * | 1998-03-13 | 1999-09-24 | Toshiba Electronic Engineering Corp | 平面表示装置、及び、その取付構造 |
JP2010266812A (ja) * | 2009-05-18 | 2010-11-25 | Sharp Corp | 表示装置 |
JP2013164618A (ja) * | 2012-01-12 | 2013-08-22 | Sharp Corp | 表示装置およびテレビジョン受像機 |
Also Published As
Publication number | Publication date |
---|---|
JP6224126B2 (ja) | 2017-11-01 |
CN105814477B (zh) | 2019-03-26 |
CN105814477A (zh) | 2016-07-27 |
US9880410B2 (en) | 2018-01-30 |
US20160291390A1 (en) | 2016-10-06 |
JPWO2015079480A1 (ja) | 2017-03-16 |
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