WO2019163555A1 - Dispositif d'affichage d'image - Google Patents

Dispositif d'affichage d'image Download PDF

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Publication number
WO2019163555A1
WO2019163555A1 PCT/JP2019/004558 JP2019004558W WO2019163555A1 WO 2019163555 A1 WO2019163555 A1 WO 2019163555A1 JP 2019004558 W JP2019004558 W JP 2019004558W WO 2019163555 A1 WO2019163555 A1 WO 2019163555A1
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WO
WIPO (PCT)
Prior art keywords
opening
display device
image display
space
flow path
Prior art date
Application number
PCT/JP2019/004558
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English (en)
Japanese (ja)
Inventor
計行 高橋
雅仁 風間
Original Assignee
パナソニックＩｐマネジメント株式会社
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2019163555A1 publication Critical patent/WO2019163555A1/fr

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Classifications

    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating

Definitions

  • the present disclosure relates to an image display device.
  • Patent Document 1 discloses an image display device including a display panel that is driven by a driver IC (integrated circuit) such as a liquid crystal panel or an organic EL (electroluminescence) panel to display an image.
  • driver IC integrated circuit
  • a liquid crystal panel or an organic EL (electroluminescence) panel to display an image.
  • This disclosure provides an image display device with improved heat dissipation.
  • An image display device includes a display panel module that displays an image on a front surface, a frame portion along a peripheral edge of the display panel module, and a back surface portion that faces a back surface of the display panel module.
  • a housing having a first opening and a second opening for communicating the back surface of the display panel module, and the internal space surrounded by the back surface portion and the outside, and the housing, which is disposed in the internal space and drives the display panel module
  • a driver IC ; a fan for discharging air flowing into the internal space from the first opening through the second opening; and a heat radiating plate thermally connected to the driver IC in the internal space.
  • a first flow path is formed in the first space that starts from the first opening and extends along the surface facing the first space of the first surface and the frame portion, and is a second surface that is the other surface of the heat sink It arrange
  • the image display device according to the present disclosure has improved heat dissipation.
  • FIG. 1 is an external perspective view of a liquid crystal television including an image display device according to an embodiment.
  • FIG. 2 is an external perspective view of a liquid crystal television including the image display device according to the embodiment.
  • FIG. 3 is an exploded perspective view of the image display apparatus according to the embodiment.
  • FIG. 4 is an external perspective view of the display panel and its peripheral components in the embodiment.
  • FIG. 5 is a cross-sectional view of the liquid crystal television and a partially enlarged cross-sectional view of the image display device.
  • FIG. 6 is an external perspective view of an example of a duct plate provided in the image display device.
  • FIG. 7 is an external perspective view of a liquid crystal television including an image display device according to a modification of the embodiment.
  • FIG. 1 is an external perspective view of a liquid crystal television including an image display device according to an embodiment.
  • FIG. 2 is an external perspective view of a liquid crystal television including the image display device according to the embodiment.
  • FIG. 3 is an exploded perspective view of the image display apparatus according to
  • FIG. 8 is an external perspective view of a liquid crystal television including an image display device according to a modification of the embodiment.
  • FIG. 9 is a cross-sectional view of a liquid crystal television and a partially enlarged cross-sectional view of an image display device according to a modification of the embodiment.
  • the inventors of the present application have found that the following problems occur with respect to a conventional image display device.
  • heat sources such as a power supply circuit and a control circuit including various elements such as an IC and a capacitor on a substrate built in the image display device.
  • a light source such as an LED (Light-Emitting Diode) used as a backlight is also a heat source.
  • a plurality of such heat sources are present inside the image display device.
  • the heat inside the image display device shortens the lifetime of the element, causes display failure such as luminance unevenness, or causes malfunction due to thermal runaway of various ICs. Therefore, in order to avoid the occurrence of these problems, heat radiation from the inside is taken into consideration in the design of the image display device.
  • an image display apparatus further including a fan for actively replacing air heated inside, in addition to a ventilation hole opened on a side surface or a back surface of a housing.
  • the present disclosure has been made based on such knowledge, and obtained an idea about the structure of an image display device for obtaining better heat dissipation performance.
  • the left-right direction is made to coincide with the X-axis direction
  • the up-down direction is the Y-axis direction
  • the gravity direction is the negative direction of the Y-axis
  • the direction opposite to gravity is Y.
  • the forward and backward directions are made to coincide with the positive direction of the axis and the Z-axis direction is made to coincide, but the correspondence relationship between these directions does not limit the posture at the time of manufacturing or using the image display device according to the present disclosure. .
  • FIG. 1 is an external perspective view of a liquid crystal television 10 including an image display device 100 according to an embodiment.
  • FIG. 2 is an external perspective view of the liquid crystal television 10 viewed from another viewpoint.
  • FIG. 3 is an exploded perspective view of the image display device 100.
  • the liquid crystal television 10 includes an image display device 100 and a stand 200 that supports the image display device 100.
  • the image display device 100 is a device that displays a still image and a moving image (hereinafter collectively referred to as an image), and includes a display panel 120 and a casing 110 that covers a portion other than the front surface of the display panel 120.
  • the display panel 120 is a liquid crystal panel including a liquid crystal cell in which liquid crystal is sealed, for example.
  • the display panel 120, the duct plate 130, the panel holder 140, the optical sheet unit 150, the LED substrate 160, and the backlight chassis 170 are assembled to constitute the display panel module 180.
  • the display panel module 180 is controlled based on the video signal input to the image display device 100 and displays an image on the front surface thereof.
  • the housing 110 includes a bezel 112 along the periphery of the display panel module 180 and a back cover 114 along the back of the display panel module 180.
  • the bezel 112 is a member that protects the outer peripheral portion of the display panel module 180 and forms part of the appearance of the image display apparatus 100.
  • a resin such as polycarbonate or polystyrene, or a metal such as an aluminum alloy is used.
  • the bezel 112 is an example of a frame portion of the housing in the present embodiment.
  • the back cover 114 is a member that covers and protects various components arranged inside the image display device 100 from the back, and forms a part of the appearance of the image display device 100.
  • a material for the back cover 114 a metal such as iron or aluminum, or a resin such as polycarbonate or polystyrene is used.
  • the back cover 114 is an example of the back part of the housing in the present embodiment.
  • the housing 110 has a plurality of openings H10, H20, and H30.
  • the openings H10 to H30 communicate the space surrounded by the bezel 112, the back surface of the display panel module 180, and the inner surface of the back cover 114 facing the back surface (hereinafter referred to as an internal space), and the outside of the housing 110. It is a through hole to be made.
  • the openings H10 to H30 are schematically shown by simple rectangular frames in FIGS. 2 and 3, respectively, but their shape, size, position, number, and range occupied by the casing 110 are shown in the drawing. It is not limited.
  • the opening H10 may be a plurality of slits arranged in the left and right (X-axis direction) near the upper end of the image display device 100.
  • the opening H10 is not a hole formed in the back cover 114 as shown in FIGS. 2 and 3, but is an upper portion of the bezel 112 shown by a broken line pattern in FIG. 3 (hereinafter referred to as an upper bezel 112A). It may be a gap provided between the rear cover 114 and the rear cover 114.
  • Such an opening H10 is an example of the first opening in the present embodiment.
  • the opening H20 is provided in the back cover 114, is located below the opening H10, and the shape may be a rectangle or a circle as illustrated. This shape and size are exemplified in relation to an exhaust fan described later. Such an opening H20 is an example of the second opening in the present embodiment.
  • the opening H30 may be located below the opening H20, and the shape may be the same as the opening H10. Further, the opening H30 is not a hole opened in the back cover 114 as shown in FIGS. 2 and 3, but a lower portion of the bezel 112 (hereinafter referred to as a lower bezel 112B) shown by a one-dot chain line pattern in FIG. And a gap provided between the back cover 114 and the back cover 114. Such an opening H30 is an example of the third opening in the present embodiment.
  • the image display device 100 further includes a duct plate 130, a panel holder 140, an optical sheet unit 150, an LED board 160, a backlight chassis 170, a signal circuit board 182 and a power circuit board. 184, a control circuit board 190, and a fan 116.
  • the duct plate 130 is thermally connected to a driver IC that drives the display panel 120.
  • a driver IC that drives the display panel 120.
  • a material having good heat transfer characteristics such as aluminum, iron, copper, or an alloy containing these is used.
  • Duct plate 130 in the present embodiment is a member obtained by bending a plate made of such a material, and is an example of a heat radiating plate in the present embodiment.
  • the driver IC is located above the display panel 120 and is connected to the display panel 120 via a flexible wiring board.
  • FIG. 4 is an external perspective view and a partially enlarged view of the peripheral components including the display panel 120 and the driver IC in the embodiment.
  • the driver IC 124 is disposed below the flexible wiring board 126 connected near the upper end of the display panel 120.
  • the relay board 122 is connected to the end of the flexible wiring board 126 opposite to the end to which the display panel 120 is connected.
  • a case where the display panel 120 and the driver IC 124 are connected in such a form is used as an example, and will be described later with reference to an assembly state diagram of the image display device 100. It is not limited to examples. Other examples of connection modes will be described later.
  • the panel holder 140 supports the display panel 120 and sandwiches the optical sheet unit 150 and the LED substrate 160 with the backlight chassis 170.
  • the optical sheet unit 150 is configured by stacking a plurality of types of sheets having different optical characteristics.
  • the sheets having different optical characteristics are, for example, a vertical prism sheet, a horizontal prism sheet, and a diffusion sheet.
  • the light distribution of the LEDs which are a plurality of point light sources spaced apart from each other, can be changed to irradiate the entire display panel 120 with light with a substantially uniform light distribution.
  • the LED substrate 160 is a substrate on which a plurality of LEDs that are the light sources of the backlight of the image display apparatus 100 are arranged apart from each other.
  • the backlight chassis 170 sandwiches the optical sheet unit 150 and the LED substrate 160 with the panel holder 140 described above.
  • the signal circuit board 182 outputs a video signal from an antenna terminal (not shown) or an external input terminal (not shown) further provided in the image display device 100 to the control circuit board 190.
  • the control circuit board 190 transfers the video signal to the driver IC 124 at an appropriate timing so that an image based on the video signal input from the signal circuit board 182 is displayed on the display panel 120.
  • the driver IC that has received this video signal drives the display panel 120 to display an image by applying an appropriate voltage to each pixel of the display panel 120.
  • the power supply circuit board 184 appropriately adjusts the electric power adjusted by rectifying the electric power input to the image display device 100 from a power source such as a commercial power source and converting the voltage to each component of the image display device 100 that requires electric power. Supply.
  • the fan 116 is, for example, an axial fan that discharges air in the internal space to the outside of the image display apparatus 100.
  • the present embodiment will be described using an example in which the fan 116 disposed at a position facing the opening H20 in the internal space discharges air flowing into the internal space from the opening H10 or the opening H30 through the opening H20.
  • the configuration of the fan included in the image display device 100 is not limited to this example. Other configuration examples of the fan included in the image display device 100 will be described later.
  • FIG. 5 is a sectional view of the liquid crystal television 10 and a partial sectional view of the image display device 100 obtained by enlarging a part thereof.
  • the cut surface for this cross-sectional view and partial cross-sectional view is a plane including the VV line shown in FIG. 1 and parallel to the YZ plane. Note that this cut surface intersects the through hole of the duct plate 130.
  • FIG. 6 is an external perspective view of the entire duct plate 130.
  • the six through holes H40 of the duct plate 130 shown in FIG. 6 are examples of through holes that penetrate between the upper surface and the lower surface of the duct plate 130.
  • a VV line in FIG. 6 indicates a cutting position of the duct plate 130 by the cut surface.
  • the duct plate 130 is disposed so as to partition the internal space into two upper and lower spaces between the opening H10 and the opening H20.
  • a space in contact with the upper surface (hereinafter referred to as the first surface) of the duct plate 130 among these two spaces is positioned on the first space, the lower surface (hereinafter referred to as the second surface) side of the duct plate 130.
  • the space is referred to as the second space.
  • the first space is a space sandwiched between the first surface of the duct plate 130 and the lower surface of the upper bezel 112A that is a part of the inner surface of the housing 110, and communicates directly with the opening H10.
  • the second space located on the second surface side of the duct plate 130 communicates directly with the opening H20 and the opening H30.
  • the duct plate 130 is in contact with the upper surface of the flexible wiring board 126, it is thermally connected to the driver IC 124 disposed on the lower surface of the flexible wiring board 126 via the flexible wiring board 126.
  • the heat generated in the driver IC 124 and transmitted to the duct plate 130 via the flexible wiring board 126 increases the temperature of the entire duct plate 130.
  • This heat is also transmitted to the upper bezel 112 ⁇ / b> A through the air convection in the first space or by heat radiation from the duct plate 130, thereby raising the temperature of the bezel 112.
  • the duct plate 130 and the upper bezel 112 ⁇ / b> A have not only heat from the driver IC 124, but also heat generated by various heat sources such as various circuit boards and LEDs in the image display device 100. It is transmitted through various heat paths.
  • the air flowing from the opening H10 into the internal space where the duct plate 130 is arranged as described above first enters the first space, and reaches the first surface and the lower surface of the upper bezel 112A, that is, the surface facing the first space. Flows along the flow path.
  • This air flow path starting from the opening H10 is referred to as a first flow path.
  • the first flow path is indicated by a white block arrow in the partially enlarged view in FIG.
  • the air flowing through the first flow path proceeds while absorbing heat from the duct plate 130 and the upper bezel 112A having higher temperatures. That is, the duct plate 130 and the upper bezel 112A heated by the heat generated by the heat source in the image display device 100 are cooled by the cooler air that is taken from outside and flows through the first flow path.
  • the air whose temperature has increased while flowing through the first flow path then enters the second space through the through hole H40.
  • the air travels toward the operating fan 116 and is exhausted from the opening H20 to the outside of the casing 110 by the fan 116.
  • the air flow path downstream of the first flow path and reaching the opening H20 in the second space is referred to as a second flow path.
  • the second flow path is indicated by a black block arrow in the partially enlarged view in FIG.
  • air may absorb heat from a higher temperature component along the second flow path to cool this component.
  • the air flowing through the second flow path can absorb the heat of the control circuit board 190.
  • the target component to be cooled by the air flowing through the second flow path is not limited to the control circuit board 190. If the part is located along the second flow path in the positional relationship between the opening H20 and the fan 116 and each part, the part is cooled by the air flowing through the second flow path.
  • the image display device 100 may be designed such that components that need or are desired to be cooled are arranged along the second flow path.
  • the heat sink provided in the image display device according to the technology disclosed in the present application may not have a bent portion as seen in the duct plate 130 shown in FIG. 3 or FIG.
  • the heat radiating plate may have a flat shape or may be curved.
  • a heat sink having a shape including a bend or a shape including a curve shown in the drawings used for the description of the embodiment is in contact with air on a wider surface than a flat plate, and thus can achieve more efficient heat dissipation. .
  • the heat dissipation plate has a protruding portion that protrudes toward the first flow path side.
  • the protrusions are, for example, conical, columnar, wall-like, ridge-like or other irregular shaped protrusions, and a plurality of such protrusions are regularly or irregularly upper surfaces (first surfaces) of the heat sink. May be.
  • the above-mentioned bending and bending are also one form of such a protrusion.
  • the effect of air rectification in the first space can be obtained depending on the arrangement.
  • a heat radiating plate having a ridge-like projection may be further bent in a stepped manner like the duct plate 130.
  • the frame portion may have a protrusion as described above at the portion facing the first space. Thereby, the efficiency of cooling in the said part of a frame part also improves.
  • the shape, number and arrangement of the through holes of the heat sink provided in the image display device according to the technology disclosed in the present application are not limited to the form of the through hole H40 included in the duct plate 130 shown in FIG.
  • the through hole H40 shown in FIG. 6 has a slit shape, and in the assembled image display device 100, the duct plate 130 is positioned so that one or two are located between the two flexible wiring boards 126 when viewed from directly above.
  • the present invention is not limited to such an embodiment. Further, it may be a long through hole such as a slit shape like the through hole H40, or may extend in a direction other than the left and right with a heat sink, or may be a shape other than a slit shape such as a circular shape. May be.
  • the length of the first flow path is determined by the position of the through hole in the heat sink. Therefore, in order to make the first flow path longer in order to obtain a higher heat dissipation efficiency by increasing the contact surface between the air flowing through the first flow path and the heat radiating plate, the through hole is positioned closer to the front surface of the image display device, If another expression is made with reference to the image display device 100, the image display device 100 may be arranged at a position farther from the opening H10 (first opening). However, if there is a too narrow part in the first flow path, the air will stagnate and it will be difficult to flow into the second flow path, and instead the heat dissipation efficiency will be reduced, or it will cause overheating. Placement in is avoided. For example, if the space between the heat sink and the frame is narrow just above the display panel module and the air does not flow smoothly, the heat sink has a through hole in the area behind the display panel module. Good.
  • the mode of the through-hole which a heat sink has is related to heat dissipation efficiency, such as a flow rate of air from the first space to the second space, a contact area between the heat sink and air in the first space, or a heat conduction path in the heat sink. It can be appropriately determined in consideration of factors.
  • the first flow path is located on the front side of the image display device of the heat sink. It may reach the end portion, get over this end portion, flow downward, and switch to the second flow path.
  • the end may have a notch for securing the air flow rate at the location where the first flow path is switched to the second flow path.
  • this notch is a deformation of the above-described through hole of the heat radiating plate, and is conceptually included as one type thereof.
  • the heat radiating plate may not have such a through hole.
  • the air that has once entered the first space from the outside is always in contact with the upper surface (first surface) of the heat sink. It is ideal to flow into the second space afterwards. Therefore, the heat sink may be in contact with the inner surface of the back surface portion of the back cover over the entire left and right direction.
  • the inner surface of the back surface portion of the back cover 114 is a flat surface
  • the end portion of the duct plate 130 on the back cover 114 side is a straight line. Further, as shown in the sectional view of FIG. 5, the end of the duct plate 130 is in contact with the inner surface of the back cover 114.
  • the air that has entered the first space from the opening H10 always comes into contact with the upper surface of the duct plate 130 before flowing into the second space.
  • the shape of the end portion of the heat sink on the back cover side may follow the shape of the inner surface of the back surface of the back cover so that the heat sink contacts the inner surface of the back cover in a larger range.
  • the fan 116 of the image display device 100 in the embodiment is disposed in the second space such that the exhaust port faces the opening H20 (second opening), and exhausts that generate a negative pressure in the space in the housing 110.
  • the fan may be any fan that discharges air flowing into the space in the housing 110 from the first opening through the second opening.
  • the air inlet is disposed in the first space so as to face the opening H10 (first opening).
  • An intake fan may be provided. In this case, an intake fan is also provided in the opening H30 (third opening).
  • the first flow path as described above is generated in the first space, and the air that has passed through the first flow path escapes to the second space. Further, the air that has entered the second space from the first space flows through the second flow path and is discharged from the opening H20 due to the positive pressure generated in the second space, even if there is no fan in the opening H20.
  • the exhaust fan or the intake fan may be located outside each opening.
  • the housing may have a plurality of second openings, and an exhaust fan facing each second opening in the second space may be provided.
  • a fan for sending the air in the first space to the second space may be provided in the through hole of the heat sink.
  • Each opening provided in the housing of the image display device according to the technology disclosed in the present application may be provided with a mesh or the like that prevents foreign substances from entering.
  • the opening H10 is located above the opening H20, but the image display device according to the technique disclosed in the present application includes a first opening and a second opening provided in the housing.
  • the positional relationship is not limited to this configuration.
  • the first opening and the second opening need only be in a positional relationship that sandwiches the heat sink in the internal space.
  • the first opening is the same as the second opening. It may be located below the height or second opening. Further, the positional relationship between the first opening and the second opening is not necessarily above the second opening depending on the shape of the housing and the attitude of the image display device in use.
  • first opening and the second opening have been described by using an example of a configuration in which the first opening and the second opening are individual holes penetrating the housing, but are disclosed in the present application.
  • the image display apparatus according to the technology is not limited to this configuration.
  • the first opening and the second opening are one continuous through hole on the housing, and the inner surface of the housing has a heat sink that divides the internal space into the first space and the second space across the through hole. You may arrange
  • the portion communicating with the first space of the through hole functions as the first opening
  • the portion communicating with the second space functions as the second opening, so that the first opening and the second opening described above display an image.
  • the first space is in contact with the first surface of the duct plate 130 and is sandwiched between the first surface and the upper bezel 112A that is the upper portion of the frame portion.
  • the flow path along the first surface and the lower surface of the upper bezel 112A is the first flow path, but is not limited thereto.
  • the frame portion is a portion that covers the periphery of the display panel module in the housing of the image display device, and a part of the back cover may be the frame portion.
  • the first space is a space sandwiched between the first surface of the heat sink and the back cover, and the first flow path starts from the first opening, and the first surface of the heat sink and the back cover in the first space. Along the surface in contact with the first space.
  • such an example will be shown as a modification of the embodiment.
  • FIG. 7 and 8 are external perspective views of a liquid crystal television 1010 including the image display device 1100 according to a modification of the above embodiment.
  • FIG. 9 is a cross-sectional view of the liquid crystal television 1010 and a partially enlarged cross-sectional view of the image display device 1100. These sectional views and partial sectional views include a line IX-IX shown in FIG. 7, and a plane parallel to the YZ plane is a cut surface.
  • components common to the above-described embodiment are denoted by common reference numerals, and description thereof is omitted.
  • this modified example will be described focusing on differences from the above-described embodiment.
  • a housing 1110 that covers a portion other than the front surface of the display panel 120 is different from the housing 110 in that a bezel 1112 is provided instead of the bezel 112 and a back cover 1114 is provided instead of the back cover 114.
  • the bezel 1112 includes an upper bezel 1112A at a position corresponding to the upper bezel 112A of the bezel 112 and a lower bezel 1112B at a position corresponding to the lower bezel 112B of the bezel 112.
  • the ratio that the bezel 1112 occupies in the width in the front-rear direction of the image display apparatus 1100 is smaller than the ratio that the bezel 112 occupies in the width in the front-rear direction of the image display apparatus 100.
  • the bezel 1112 covers the periphery of the image display device 1100 only a part of the front side, unlike the bezel 112 that covers the entire periphery of the image display device 100 in the front-rear direction.
  • the back cover 1114 covers the entire back surface of the image display device 1100 in common with the back cover 114 that covers the entire back surface of the image display device 100.
  • the back cover 1114 has a wall extending forward (hereinafter referred to as an edge wall) around the periphery of the back cover 1114, and further covers the rear side portion of the periphery of the image display device 1100 that is not covered by the bezel 1112.
  • the image forming apparatus 1100 is different from the back cover 114 in that it constitutes a part of the frame portion of the image display device 1100.
  • a first flow path is formed along. The air flowing through the first flow path advances while absorbing the heat of the edge wall of the back cover 1114 whose temperature has risen. That is, the duct plate 130 facing the first space and the edge wall of the back cover 1114 are cooled by air having a lower temperature that is taken in from the outside and flows through the first flow path.
  • the frame of the image display device includes a portion in which the temperature is likely to increase due to heating in the image display device by a component serving as a heat source.
  • This part of the frame part may be composed only of a bezel, may be composed of a back cover, or may be composed of both.
  • Any frame portion of the configuration is a target for which heat dissipation is promoted by the configuration of the image display device according to the present disclosure.
  • the back cover 1114 in this modification is made of metal such as iron or aluminum, it absorbs the heat of the upper bezel 1112A better than that of resin such as polycarbonate, so Heat dissipation is performed more effectively. Further, the close contact of the edge wall with the upper bezel 1112A over a wider area promotes heat dissipation for the same reason.
  • FIG. 9 shows an example in which the upper bezel 1112A and the edge wall are both folded back at the ends and contact each other on the surface.
  • the bezel and the back cover are integrally formed, and there is no boundary between the bezel and the back cover that can be easily recognized.
  • the part protecting the outer peripheral part of the display panel module is a bezel and the other part is a back cover.
  • the duct plate 130 is thermally connected to the driver IC via the flexible wiring board 126, but the heat radiating plate in the image display device according to the technique disclosed in the present application.
  • the form of thermal connection between the driver IC and the driver IC is not limited to this.
  • the heat radiation plate may be in direct contact with the driver IC to establish a thermal connection.
  • the heat radiation plate and the driver IC are thermally connected in a mode that can be appropriately taken according to the connection mode between the display panel and the driver IC, the positional relationship between the members related to the connection between the display panel and the driver IC, and the surrounding members. obtain.
  • the inclusion for heat connection between the heat sink and the driver IC is not limited to the flexible wiring board of the embodiment, and may be a hard board, for example.
  • the inclusions are easy to contact with the heat sink on a wider surface, such as a flexible wiring board, the heat dissipation efficiency will be improved.
  • the shorter the distance between the heat sink and the driver IC into which the inclusion enters the more efficiently the heat of the driver IC is transmitted by the heat sink.
  • the image display device 100 in the embodiment is a liquid crystal display device including a direct type backlight using an LED that is a point light source, but the image display device according to the technique disclosed in the present application is not limited thereto.
  • a liquid crystal display device having an edge-type backlight, or a display device having a display panel using an organic EL, and the like, the heat dissipation mechanism described above is applied to an image display device that incorporates components that can be a heat source and desires heat dissipation. be able to.
  • the heat dissipation plate is arranged so that the first space is provided along the side, so that the temperature easily rises in the frame portion.
  • a configuration that promotes heat dissipation of the part is obtained.
  • the degree of freedom of the posture is high, and when there are a plurality of sides that can be positioned on the upper side, or when the front surface of the display panel is substantially directly above or substantially below,
  • the heat sink may be arranged so that the first space is provided along a plurality of sides.
  • the heat radiating plate may be arranged so that the first space is provided along the side where the temperature is likely to rise due to the fact that it is in the vicinity of a component serving as a heat source regardless of the position on the image display device. That is, the heat sink is arranged so that the first space is provided in the internal space over the range where heat dissipation of the frame portion is desired, and along the surface facing the first space of the heat sink and the inner surface of the housing in the range.
  • the first flow path may be formed.
  • the range in which the first flow path is formed in the first space may be manually switched arbitrarily or automatically switched according to the posture at the time of use. For example, when an intake fan is provided in each of the plurality of first openings, the range in which the first flow path is formed can be switched by switching the fan to be operated.
  • the image display device 100 includes the display panel module 180 that displays an image on the front surface, the housing 110, the driver IC 124, the fan 116, and the duct plate 130.
  • the casing 110 has a frame portion along the periphery of the display panel module 180 and a back surface portion facing the back surface of the display panel module 180, and is surrounded by the frame portion, the back surface portion, and the back surface of the display panel module.
  • the driver IC 124 is arranged in this internal space and drives the display panel module.
  • the fan 116 discharges air flowing into the internal space from the first opening through the second opening.
  • the duct plate 130 that is a heat sink and is thermally connected to the driver IC 124 is positioned between the first opening and the second opening in the internal space, and is one surface of the duct plate 130 in the internal space.
  • a first flow path is formed in the first space in contact with the first surface, starting from the first opening and extending along the first surface and the surface facing the first space of the frame portion, and is the other surface of the duct plate 130. It arrange
  • the heat generated by the driver IC 124 is transmitted to the duct plate 130.
  • the heat transmitted to the duct plate 130 enters the internal space from the outside of the image display device 100 and is absorbed by the air flowing through the first flow path.
  • the duct plate 130 heated by the heat from the driver IC 124 is cooled.
  • the air flowing through the first flow path also cools the upper bezel 112A.
  • the air heated while flowing through the first flow path flows into the second flow path across the duct plate 130 and is discharged out of the image display device 100.
  • the image display device 100 that efficiently dissipates heat by such a heat dissipation mechanism has improved heat dissipation performance compared to a conventional image display device that does not have such a heat dissipation mechanism.
  • the first surface may be the upper surface of the heat sink.
  • the duct plate 130 may have a through hole H40 that passes between the first surface and the second surface and allows the air flowing through the first flow path to pass through the second flow path.
  • This forms a flow path of air that smoothly flows from the first space to the second space in consideration of heat dissipation efficiency.
  • the duct plate 130 may have a protrusion that protrudes toward the first flow path.
  • a rise in the temperature of the driver IC 124 can be suppressed as a result of improving the heat dissipation performance.
  • thermal runaway of the driver IC 124 thermal deterioration of surrounding components, display failure such as luminance unevenness caused by heat transmitted to the liquid crystal cell of the display panel 120 via the flexible wiring board, and other troubles of the image display device 100 due to heat. Occurrence is suppressed.
  • the temperature rise of the bezel 112 is suppressed, it is possible to prevent the person who touched the bezel 112 from feeling uncomfortable due to unexpected heat.
  • the present disclosure can be applied to an image display device.
  • the present disclosure is applicable to a television receiver, a monitor display, a digital signage, or the like.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

La présente invention concerne un dispositif d'affichage d'image comprenant : un module de panneau d'affichage (180) ; un boîtier (110) comprenant une partie cadre et une partie arrière, le boîtier comprenant une première ouverture et une seconde ouverture qui permettent à un espace interne entouré par la partie cadre, à la partie arrière et au dos du module de panneau d'affichage (180), de communiquer avec l'extérieur ; un circuit intégré d'attaque (124) destiné à attaquer le module de panneau d'affichage (180) ; un ventilateur (116) permettant à l'air qui entre dans l'espace interne par la première ouverture de sortir par la seconde ouverture ; et une plaque de dissipation de chaleur (130) en communication thermique avec le circuit intégré d'attaque (124). La plaque de dissipation de chaleur (130) est située entre la première ouverture et la seconde ouverture dans l'espace interne, de sorte que la plaque de dissipation de chaleur (130) est conçue pour former, dans un premier espace de l'espace interne qui entre en contact avec une première surface qui est une surface de la plaque de dissipation de chaleur (130), un premier passage d'écoulement partant de la première ouverture et s'étendant le long de la première surface et de la surface de la partie cadre qui fait face au premier espace, et pour former, dans un espace situé à proximité d'une seconde surface qui est l'autre surface de la plaque de dissipation de chaleur (130), un second passage d'écoulement situé en aval du premier passage d'écoulement et allant jusqu'à la seconde ouverture.
PCT/JP2019/004558 2018-02-26 2019-02-08 Dispositif d'affichage d'image WO2019163555A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018031938 2018-02-26
JP2018-031938 2018-02-26

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WO2019163555A1 true WO2019163555A1 (fr) 2019-08-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023108517A1 (fr) * 2021-12-16 2023-06-22 京东方科技集团股份有限公司 Structure unitaire complète

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001326488A (ja) * 2000-05-16 2001-11-22 Canon Inc 電子機器
JP2010060736A (ja) * 2008-09-02 2010-03-18 Panasonic Corp プラズマディスプレイ装置
JP2014059502A (ja) * 2012-09-19 2014-04-03 Sharp Corp 表示装置
JP2016128875A (ja) * 2015-01-09 2016-07-14 キヤノン株式会社 表示装置
JP2017044979A (ja) * 2015-08-28 2017-03-02 キヤノン株式会社 表示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001326488A (ja) * 2000-05-16 2001-11-22 Canon Inc 電子機器
JP2010060736A (ja) * 2008-09-02 2010-03-18 Panasonic Corp プラズマディスプレイ装置
JP2014059502A (ja) * 2012-09-19 2014-04-03 Sharp Corp 表示装置
JP2016128875A (ja) * 2015-01-09 2016-07-14 キヤノン株式会社 表示装置
JP2017044979A (ja) * 2015-08-28 2017-03-02 キヤノン株式会社 表示装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023108517A1 (fr) * 2021-12-16 2023-06-22 京东方科技集团股份有限公司 Structure unitaire complète

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