WO2021158128A1 - Dispositif d'affichage électronique à gestion thermique améliorée - Google Patents

Dispositif d'affichage électronique à gestion thermique améliorée Download PDF

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Publication number
WO2021158128A1
WO2021158128A1 PCT/NZ2021/050014 NZ2021050014W WO2021158128A1 WO 2021158128 A1 WO2021158128 A1 WO 2021158128A1 NZ 2021050014 W NZ2021050014 W NZ 2021050014W WO 2021158128 A1 WO2021158128 A1 WO 2021158128A1
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WO
WIPO (PCT)
Prior art keywords
backlight
electronic display
display device
heatsink
airflow
Prior art date
Application number
PCT/NZ2021/050014
Other languages
English (en)
Inventor
Yohan BORDA
Campbell Bryce Easton
Original Assignee
Fingermark Holdings Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fingermark Holdings Limited filed Critical Fingermark Holdings Limited
Publication of WO2021158128A1 publication Critical patent/WO2021158128A1/fr

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Classifications

    • 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
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136—Forced ventilation, e.g. by fans
    • H05K7/20154—Heat dissipaters coupled to components
    • 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
    • G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
    • G02F1/133385—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell with cooling means, e.g. fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • 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
    • G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133628—Illuminating devices with cooling means
    • 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
    • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
    • 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
    • G02F2201/36—Airflow channels, e.g. constructional arrangements facilitating the flow of air
    • 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
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0209—Thermal insulation, e.g. for fire protection or for fire containment or for high temperature environments
    • 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
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0213—Venting apertures; Constructional details thereof
    • H05K5/0214—Venting apertures; Constructional details thereof with means preventing penetration of rain water or dust
    • 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
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20127—Natural convection
    • 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
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/202—Air circulating in closed loop within enclosure wherein heat is removed through heat-exchangers

Definitions

  • the invention relates to electronic display devices and in particular, but not exclusively, to outdoor electronic displays that have thermal management features to prevent overheating.
  • Electronic displays e.g. TVs
  • Thermal management is a challenge in the design of outdoor electronic displays. If a display becomes too hot the display may malfunction or the service life of components within the display may be reduced.
  • the backlight Electronic displays have backlights behind the screen, often in the form of an LED array. In outdoor electronic displays the backlight may be many times brighter than indoor displays (such as an indoor TV) and may therefore produce a large amount of heat.
  • Managing the heat generated within an electronic display may be particularly challenging when the screen is experiencing direct sunlight.
  • the backlight When a display is in direct sunlight the backlight usually operates at full brightness so that users can see the displayed images/video. This means that when the display is receiving the most heat from the sun, the backlight and power supply must run at maximum power and also produce maximum heat. Additionally, high ambient temperatures make removing heat from the electronic display to the surroundings difficult.
  • Some electronic displays include a fully waterproof enclosure including a heatsink having an internal side and an external side. Electric fans circulate internal air that is heated by the backlight and other internal components within the enclosure past the internal side of the heatsink. Heat received by the internal side of the heatsink flows to the external side and is dissipated to ambient.
  • some electronic displays include a fully waterproof enclosure housing the components of the electronic display. Electric fans circulate internal air that is heated by the backlight and other electronic components through an air conditioning system to allow heat to be absorbed and removed from the interior of the waterproof enclosure via a refrigerant.
  • some electronic displays are housed in a semi-waterproof enclosure. Air circulates between the interior of the enclosure and ambient, allowing cooler air from ambient to cool the internal components.
  • a problem with some existing electronic display devices that rely on an internal airflow to receive heat and transfer it to a heatsink is that heat from the components is transferred to the internal airflow prior to being transferred to the heatsink.
  • the result is that significant heat released by the backlight (or received due to solar load) circulates within the device prior to absorption by the heatsink. This can cause heating of other sensitive electronic components within the device which otherwise do not generate as much heat.
  • a problem with existing refrigerated display devices is the significant cost of installing an air conditioning system.
  • the air conditioning system must also be maintained.
  • an electronic display device comprising: a housing at least partly defining a sealed interior; an electronic display panel provided within the sealed interior for displaying images and/or video to viewers of the electronic display device; a backlight for the electronic display panel, the backlight provided within the sealed interior; and a backlight heatsink having a first side within the sealed interior and a second side opposite the first side, the first side of the backlight heatsink being in contact with the backlight to conduct heat away from the backlight, the second side of the backlight heatsink being outside of the sealed interior to release heat conducted away from the backlight to the surroundings of the electronic display device.
  • the housing comprises a transparent panel behind which the electronic display panel is mounted.
  • the transparent panel comprises a glass panel.
  • the electronic display panel comprises a TFT LCD panel.
  • the electronic display panel comprises a diffuser layer.
  • the backlight comprises an LED array.
  • the backlight is mounted to the first side of the backlight heatsink.
  • the backlight heatsink comprises a plurality of fins on the second side thereof. More preferably, each of the fins is oriented vertically.
  • the electronic display device comprises a plurality of backlight heatsinks. In some embodiments the electronic display device comprises a pair of backlight heatsinks arranged side-by- side.
  • the housing comprises one or more vents to allow air from the surroundings of the electronic display device to flow into the housing, and to flow past and receive heat from the second side of the backlight heatsink.
  • the housing comprises one or more upper vents located at an upper portion of the housing and one or more lower vents located at a lower portion of the housing.
  • the upper vents and the lower vents are configured to allow air to flow from the surroundings into the lower vents, past the second side of the backlight heatsink to receive heat from the backlight heatsink, and out of the upper vents.
  • the electronic display device is configured for use outdoors.
  • an electronic display device comprising: a housing at least partly defining a sealed interior; an electronic display panel provided within the sealed interior for displaying images and/or video to viewers of the electronic display device; a backlight for the electronic display panel, the backlight provided within the sealed interior and spaced from the electronic display panel to define a backlight cavity between the backlight and the electronic display panel; and an airflow heatsink having a first side within the sealed interior and a second side opposite the first side, wherein air is able to circulate within the sealed interior including flowing through the backlight cavity and then past the first side of the airflow heatsink to transfer heat from the backlight cavity to the first side of the airflow heatsink; and wherein the second side of the airflow heatsink is outside of the sealed interior to transfer heat received at the first side of the airflow heatsink to the surroundings of the electronic display device.
  • the housing comprises a transparent panel behind which the electronic display panel is mounted.
  • the transparent panel comprises a glass panel.
  • the electronic display panel comprises a TFT LCD panel.
  • the electronic display panel comprises a diffuser layer.
  • the backlight comprises an LED array.
  • the backlight is mounted to the airflow heatsink.
  • the airflow heatsink comprises a plurality of fins on the first side thereof and a plurality of fins on the second side thereof.
  • the plurality of fins on each of the first side and the second side of the airflow heatsink are oriented vertically.
  • the electronic display device comprises a plurality of airflow heatsinks.
  • the electronic display device comprises a pair of airflow heatsinks, each one of the pair of airflow heatsinks being located on a respective lateral side of the electronic display device.
  • the airflow heatsink comprises a recess on the first side thereof configured to receive a timing controller.
  • the recess is formed by a portion of the airflow heatsink without fins.
  • air is able to circulate within the sealed interior including flowing upwardly through the backlight cavity and downwardly past the first side of the airflow heatsink.
  • air is able to circulate within the sealed interior including flowing from an upper end of the backlight cavity, over an upper end of the backlight, and towards the first side of the airflow heatsink.
  • air is able to circulate within the sealed interior including flowing from the first side of the airflow heatsink, into and through an electronics cavity, and towards a lower end of the backlight cavity.
  • the electronics cavity is located below the lower end of the backlight cavity.
  • the electronic display device comprises one or more fans configured to circulate air within the sealed interior.
  • the one or more fans are located within the electronics cavity.
  • the housing comprises one or more vents to allow air from the surroundings of the electronic display device to flow into the housing, and to flow past and receive heat from the second side of the airflow heatsink.
  • the housing comprises one or more upper vents located at an upper portion of the housing and one or more lower vents located at a lower portion of the housing.
  • the upper vents and the lower vents are configured to allow air to flow from the surroundings into the lower vents, past the second side of the airflow heatsink to receive heat from the airflow heatsink, and out of the upper vents.
  • the sealed interior is at least partly defined by the airflow heatsink.
  • the electronic display device comprises a backlight heatsink having a first side within the sealed interior and a second side opposite the first side, the first side of the backlight heatsink being in contact with the backlight to conduct heat away from the backlight, the second side of the backlight heatsink being outside of the sealed interior to release heat conducted away from the backlight to the surroundings of the electronic display device.
  • the backlight is mounted to the first side of the backlight heatsink.
  • the backlight heatsink comprises a plurality of fins on the second side thereof. More preferably, each of the fins is oriented vertically.
  • the electronic display device comprises a plurality of backlight heatsinks. In some embodiments the electronic display device comprises a pair of backlight heatsinks arranged side-by- side.
  • the electronic display device comprises a pair of airflow heatsinks, each one of the pair of airflow heatsinks being located on a respective lateral side of the backlight heatsink.
  • the sealed interior is at least partly defined by the backlight heatsink.
  • the electronic display device is configured for use outdoors.
  • an electronic display device comprising: a housing at least partly defining a sealed interior; an electronic display panel provided within the sealed interior for displaying images and/or video to viewers of the electronic display device; a backlight for the electronic display panel, the backlight provided within the sealed interior and spaced from the electronic display panel to define a backlight cavity between the backlight and the electronic display panel; a backlight heatsink having a first side within the sealed interior and a second side opposite the first side, the first side of the backlight heatsink being in contact with the backlight to conduct heat away from the backlight, the second side of the backlight heatsink being outside of the sealed interior to release heat conducted away from the backlight to the surroundings of the electronic display device; and an airflow heatsink having a first side within the sealed interior and a second side opposite the first side, wherein air is able to circulate within the sealed interior including flowing through the backlight cavity and then past the first side of the airflow heatsink to transfer heat from the backlight cavity to the first
  • the housing comprises a transparent panel behind which the electronic display panel is mounted.
  • the transparent panel comprises a glass panel.
  • the electronic display panel comprises a TFT LCD panel.
  • the electronic display panel comprises a diffuser layer.
  • the backlight comprises an LED array.
  • the backlight is mounted to the first side of the backlight heatsink.
  • the backlight heatsink comprises a plurality of fins on the second side thereof. More preferably, each of the fins of the backlight heatsink is oriented vertically.
  • the electronic display device comprises a plurality of backlight heatsinks. In some embodiments the electronic display device comprises a pair of backlight heatsinks arranged side-by- side.
  • the backlight is mounted to the airflow heatsink.
  • the airflow heatsink comprises a plurality of fins on the first side thereof and a plurality of fins on the second side thereof.
  • the plurality of fins on each of the first side and the second side are oriented vertically.
  • the electronic display device comprises a plurality of airflow heatsinks.
  • the electronic display device comprises a pair of airflow heatsinks, each one of the pair of airflow heatsinks being located on a respective lateral side of the backlight heatsink.
  • the airflow heatsink comprises a recess on the first side thereof configured to receive a timing controller.
  • the recess is formed by a portion of the airflow heatsink without fins.
  • air is able to circulate within the sealed interior including flowing upwardly through the backlight cavity.
  • air is able to circulate within the sealed interior including flowing downwardly past the first side of the airflow heatsink.
  • air is able to circulate within the sealed interior including flowing from an upper end of the backlight cavity, over an upper end of the backlight, and towards the first side of the airflow heatsink.
  • air is able to circulate within the sealed interior including flowing from the first side of the airflow heatsink, into and through an electronics cavity, and towards a lower end of the backlight cavity.
  • the electronics cavity is located below the lower end of the backlight cavity.
  • the electronic display device comprises one or more fans configured to circulate air within the sealed interior.
  • the one or more fans are located within the electronics cavity.
  • the housing comprises one or more vents to allow air from the surroundings of the electronic display device to flow into the housing, and to flow past and receive heat from the second side of the backlight heatsink and the airflow heatsink.
  • the housing comprises one or more upper vents located at an upper portion of the housing and one or more lower vents located at a lower portion of the housing.
  • the upper vents and the lower vents are configured to allow air to flow from the surroundings into the lower vents, past the second side of the backlight heatsink and the airflow heatsink to receive heat from the backlight heatsink and the airflow heatsink, and out of the upper vents.
  • the sealed interior is at least partly defined by the airflow heatsink.
  • the sealed interior is at least partly defined by the backlight heatsink.
  • the electronic display device is configured for use outdoors.
  • an electronic display device comprising: a housing at least partly defining a sealed interior; an electronic display panel provided within the sealed interior for displaying images and/or video to viewers of the electronic display device; and a backlight for the electronic display panel, the backlight provided within the sealed interior and spaced from the electronic display panel to define a backlight cavity between the backlight and the electronic display panel, wherein air is able to circulate within the sealed interior including flowing through the backlight cavity to transfer heat away from the backlight cavity.
  • an electronic display device comprising: a housing at least partly defining a sealed interior; an electronic display panel provided within the sealed interior for displaying images and/or video to viewers of the electronic display device; a backlight for the electronic display panel, the backlight provided within the sealed interior; and an airflow heatsink having a first side within the sealed interior and a second side opposite the first side, wherein air is able to circulate within the sealed interior including flowing past the first side of the airflow heatsink to transfer heat from the air to the first side of the airflow heatsink; and wherein the second side of the airflow heatsink is provided outside of the sealed interior to transfer heat received at the first side of the airflow heatsink to the surroundings of the electronic display device.
  • Figure 1 is a front perspective view illustration of an electronic display device according to an embodiment of the invention.
  • Figure 2 is a rear perspective view illustration of the electronic display device of Figure 1;
  • Figure 3 is a cross section view illustration through the electronic display device of Figure 1;
  • Figure 4 is a detail view focusing on an airflow heatsink visible in Figure 3;
  • Figure 5 is a detail view focusing on a backlight heatsink visible in Figure 3;
  • Figure 6 is a perspective cutaway view illustration of an upper portion of the electronic display device of Figure 1;
  • Figure 7 is a perspective cutaway view illustration of a lower portion of the electronic display device of Figure 1;
  • Figure 8 is a perspective cutaway view illustration of a middle and lower portion of the electronic display device of Figure 1;
  • Figure 9 is a rear perspective view illustration of the electronic display device of Figure 1 with a back panel removed;
  • Figure 10 is a perspective view illustration of an airflow heatsink of the electronic display device of Figure 1.
  • Figures 1 and 2 show perspective views of an electronic display device 1.
  • Electronic display device 1 is a device for displaying images and video, in this embodiment.
  • the electronic display device 1 may be used as an outdoor TV, an information display, menu board, an advertisement display, for games, or the like. In other embodiments the electronic display device 1 may display only images.
  • the electronic display device 1 may also be used indoors and, in some embodiments, may be designed solely for use indoors.
  • the electronic display device 1 comprises a housing 2 configured to house components of the electronic display device.
  • the housing 2 may be thin, moderately wide and tall as shown in Figs. 1 and 2, to provide a display having a rectangular aspect ratio provided in a housing that is slim and, overall, generally flat.
  • the housing 2 has a flat forward facing panel.
  • the electronic display device 1 is configured to stand upright on the ground and comprises a base 3.
  • the base 3 may be secured to the ground.
  • the housing 2 may be mounted to another support structure, for example a wall, via a stand or bracket.
  • the electronic display device 1 further comprises an electronic display panel 5 for displaying images and/or video to viewers of the electronic display device 1.
  • the housing 2 comprises a transparent panel 4 behind which the electronic display panel 5 is located.
  • the transparent panel 4 is formed from glass although in other embodiments may be formed from another suitable material, such as a suitable transparent plastic material.
  • the electronic display device 1 comprises a first panel behind which the electronic display panel 5 is located and a second panel adjacent the first panel.
  • the first panel may be located in an upper portion of the electronic display device 1 and the second panel may be located in a bottom portion of the electronic display device 1.
  • the first panel may be a transparent panel 4 and the second panel may be removable to allow access to the interior of the electronic display device 1, for example for service or replacement of electronics.
  • both the first panel and the second panel are formed from glass.
  • the second panel is not transparent and may be formed from metal or plastic, for example.
  • the base 3 may be removeable or may comprise a removable access panel to enable access to the interior of the electronic display device 1, for example to facilitate service or replacement of electronics within the electronic display device 1.
  • an access port may be provided elsewhere on the electronic display device 1.
  • the electronic display panel 5 comprises a liquid-crystal display (LCD) panel.
  • the electronic display panel 5 may comprise a thin-film-transistor (TFT) LCD panel.
  • the electronic display panel 5 may comprise another suitable display panel, such as an LED, OLED or plasma display, or the like.
  • the electronic display panel 5 may also comprise a diffuser layer configured to diffuse light provided by a backlight.
  • the electronic display panel 5 of the electronic display device 1 in the illustrated embodiment comprises a TFT LCD panel and a diffuser layer.
  • the electronic display panel 5 may be bonded to the transparent panel 4, which may advantageously facilitate a high-quality picture through the transparent panel 4.
  • the electronic display panel 5 may be spaced from the transparent panel 4, which may advantageously prevent or reduce damage to the electronic display panel 5 if the transparent panel 4 is damaged, for example by vandalism.
  • the electronic display device 1 further comprises a backlight 6.
  • the backlight 6 comprises a planar LED array formed by a plurality of LEDs 7.
  • the LEDs 7 are spread across the width and height of the backlight 6.
  • the backlight 6 is spaced from the electronic display panel 5 to define a backlight cavity 8 between the backlight 6 and the electronic display panel 5.
  • the backlight cavity 8 provides space for the light from each LED of the backlight 6 to spread out before reaching the electronic display panel 5, and preferably sufficient space for the light from the LEDs to evenly light the panel.
  • the diffuser layer of the electronic display panel 5 may further diffuse the light from the backlight 6 before reaching the TFT LCD panel.
  • the housing 2 at least partly defines a sealed interior of the electronic display device 1 which houses electronic components.
  • the sealed interior of the electronic display device 1 is fully sealed and waterproofed to protect the electronic components housed therein.
  • Some existing outdoor TVs that are only semi-waterproofed may suffer from dust and humid air causing damage to the electronic components.
  • the electronic display panel 5, the backlight 6 and backlight cavity 8 are provided within the sealed interior.
  • a sealed portion e.g. the sealed interior
  • the housing 2 at least partly defines the sealed interior along with one or more backlight heatsinks 9 and one or more airflow heatsinks 12, which will be described below in more detail.
  • the front panel of the housing 2, a top cap 25 on the housing 2 (shown in Figure 9) and the base 3 may together define the sealed interior with the housing 2 along with the heatsinks. Seals may be provided between these parts to ensure sufficient sealing and waterproofing between these parts to create the sealed interior. Gaskets may be provided between the heatsinks and the housing 3.
  • the electronic display device 1 comprises a backlight heatsink 9.
  • the backlight heatsink 9 is configured to allow heat to flow away from the backlight 6.
  • the backlight 6 can produce significant heat in use, which should be removed from the backlight 6 to avoid damage to the LEDs 7 or a reduction in their service life.
  • the backlight heatsink 9 is in direct contact with the backlight 6.
  • the backlight heatsink 9 comprises a first side 10 and a second side 11 opposite the first side 10.
  • the first side 10 is a front side of the backlight heatsink 9 and the second side 11 is a rear side, with respect to the normal orientation of the display.
  • the first side 10 is within the sealed interior.
  • the first side 10 of the backlight heatsink 9 is in direct contact with the backlight 6 to conduct heat away from the backlight 6.
  • the second side 11 of the backlight heatsink 9 is outside of the sealed interior to release heat conducted away from the backlight 6 to the surroundings of the electronic display device 1.
  • the backlight heatsink 9 may be formed from aluminium, which has a good thermal conductivity to transfer heat from the first side 10 to the second side 11.
  • Other suitable materials for the backlight heatsink 9, such as copper, can be used in alternative embodiments.
  • the backlight heatsink 9 being in direct contact with the backlight 6 enables heat to be removed from the backlight 6 by the backlight heatsink 9 via conduction.
  • a significant amount of the heat produced by the backlight 6 can be absorbed by the backlight heatsink 9 and dissipated outside of the sealed interior before that heat raises the temperature of the air within the sealed interior or other components within the device.
  • Existing outdoor display devices which rely on air circulating within the device and past a heatsink separate from the backlight may suffer from high temperatures within the device, including high temperatures of sensitive electronic components.
  • the backlight heatsink 9 being in direct contact with the backlight 6 may reduce the amount of heat from the backlight 6 that reaches other electronic components within the electronic display device 1.
  • the second side 11 of the backlight heatsink 9 may be provided within a vented portion of the housing 2.
  • the vented portion of the housing 2 may be configured to allow air from the surroundings to flow into and out of the housing 2, absorbing heat from the backlight heatsink 9.
  • the second side 11 of the backlight heatsink 9 may be outside of housing 2 exposed to the surroundings.
  • the backlight 6 is mounted to the first side 10 of the backlight heatsink 9.
  • the backlight 6 may be in contact with the backlight heatsink 9 but mounted to another component, such as an airflow heatsink 12 (as will be described below), or a separate backlight support or chassis.
  • the backlight heatsink 9 comprises a plurality of fins 13 on the second side 11 of the backlight heatsink 9.
  • the fins 13 increase the surface area of the second side 11 of the backlight heatsink 9 to provide for good heat transfer from the backlight heatsink 9 to air in contact with the second side 11 of the backlight heatsink 9.
  • the fins 13 of the backlight heatsink 9 are each aligned vertically.
  • the vertical arrangement of fins 13 on the backlight heatsink 9 allows air to flow vertically past the second side 11 of the backlight heatsink 9 between the fins 13. As the air is heated by the backlight heatsink 9 on the second side 11, it may tend to rise.
  • the vertical orientation of the fins 13 may advantageously allow a vertical airflow past the second side 11 to occur even without forced convection.
  • the fins 17 are substantially straight. In other embodiments, the fins 17 may have a different orientation and/or may be curved.
  • the electronic display device 1 comprises a plurality of backlight heatsinks 9.
  • the electronic display device 1 comprises a pair of backlight heatsinks 9 arranged side-by- side.
  • the electronic display device 1 may comprise only one backlight heatsink or may comprise three or more backlight heatsinks (e.g. arranged side-by-side or one above another).
  • the backlight heatsinks 9 are elongate, extending substantially from the top to the bottom of the electronic display device 1.
  • the backlight heatsinks 9 are long to provide a large surface area on the second side 11 of each backlight heatsink 9 over which cooling air can flow.
  • the large size of the backlight heatsinks 9, which may be larger than the backlight 6 in some embodiments, advantageously provides each backlight heatsink 9 with a large mass, allowing it to absorb a large amount of heat.
  • the electronic display device 1 comprises one or more airflow heatsinks 12.
  • the electronic display device 1 comprises two airflow heatsinks 12, each having a first side 15 and a second side 16 opposite the first side 15.
  • Figure 10 shows one airflow heatsink 12 in isolation.
  • the first side 15 is within the sealed interior of the housing 2.
  • each airflow heatsink 12 also partly defines the sealed interior.
  • the second side 16 of the airflow heatsink 12 is outside of the sealed interior and configured to transfer heat to the surroundings of the electronic display device 1.
  • the second side 16 of the airflow heatsink 12 is exposed to air from the surroundings of the electronic display device 1.
  • air is able to circulate within the sealed interior of the electronic display device 1.
  • the air is able to circulate within the sealed interior including flowing through the backlight cavity 8 and then past the first side 15 of the airflow heatsink 12, to transfer heat from the backlight cavity 8 to the first side 15 of the airflow heatsink 12.
  • the air within the sealed interior of the housing 2 is heated by the backlight 6 and electronic display 5 (which itself is partly heated by solar load) while in the backlight cavity 8, but then transfers that heat to the airflow heatsink 12 when it flows past the first side 15 of the airflow heatsink 12.
  • after a portion of air flows through the backlight cavity 9 it may flow around an edge (e.g. the top, or bottom) of the backlight 6 and then flow past the first side 15 of the airflow heatsink 12 on the opposite side of the backlight 6 from the backlight cavity 8.
  • the airflow heatsink 12 allows heat to be transferred from the air within the sealed interior to the surroundings of the electronic display device 1.
  • the second side 16 of the airflow heatsink 12 is outside of the sealed interior and exposed to air from the surroundings, the second side
  • the 16 of the airflow heatsink 12 is configured to transfer heat received at the first side 15 of the airflow heatsink 12 to the surroundings of the electronic display device 1.
  • the airflow heatsink 12 may be formed from aluminium, which has a good thermal conductivity to transfer heat from the first side 15 to the second side 16.
  • the airflow heatsink 12 may be formed from another suitable material, such as copper.
  • the second side 16 of the airflow heatsink 12 is provided within a vented portion of the housing 2.
  • the vented portion of the housing 2 may be configured to allow air from the surroundings to flow into and out of the housing 2, absorbing heat from the airflow heatsink 12.
  • the second side 16 of the airflow heatsink 12 may be outside of the housing 2 exposed to the surroundings.
  • each airflow heatsink 12 comprises a plurality of fins 17 on the first side 15 thereof. Additionally, each airflow heatsink 12 comprises a plurality of fins 17 on the second side 16 thereof. The fins 17 increase the surface area of the airflow heatsink 12 to improve heat transfer between the air and the airflow heatsink 12.
  • the airflow heatsink 12 comprises fins
  • the airflow heatsink 12 may be known as a twin-wall heatsink, having two walls of fins.
  • the airflow heatsink 12 may have fins on only one side or on neither of its sides (e.g. the airflow heatsink 12 may be in the form of a cold plate).
  • the fins 17 on each of the first side 15 and the second side 16 of each airflow heatsink 12 are oriented vertically.
  • the vertical arrangement of fins 17 on the airflow heatsink 12 allows air to flow vertically past the second side 16 of the airflow heatsink 12 between the fins 17.
  • the vertical orientation of the fins 17 may advantageously allow a vertical airflow to occur even without forced convection past the second side 16.
  • the fins 17 are substantially straight. In other embodiments, the fins 17 may have a different orientation and/or may be curved.
  • the electronic display device 1 may comprise a plurality of airflow heatsinks 12. As shown in Figures 3 and 9, the electronic display device 1 comprises a pair of airflow heatsinks 12. In this embodiment, each one of the pair of airflow heatsinks 12 is located on a respective lateral side of the backlight heatsinks 9.
  • the airflow heatsinks 12 being located alongside the backlight heatsinks 9, rather than behind the backlight heatsinks 9, may keep the electronic display device 1 slim.
  • the thickness of the airflow heatsinks 12, backlight heatsinks 9 and clearances therebetween would result in an electronic display device 1 with a greater depth than the illustrated embodiment.
  • the side-by-side arrangement of the backlight heatsinks 9 and airflow heatsink 12 may provide for a less obtrusive electronic display device 1.
  • each airflow heatsink 12 is elongate and extends substantially from the top to the bottom of the electronic display device 1.
  • the airflow heatsinks 12 have a large surface area on both the first side 15 and the second side 16, to provide for good heat absorption from hot air within the sealed interior, and good heat transfer from each airflow heatsink 12 to the surroundings.
  • the large size of each airflow heatsink 12 advantageously provides the airflow heatsink 12 with a large mass, allowing it to absorb a large amount of heat.
  • Figure 6 shows a portion of the upper end of the backlight cavity 8 of the electronic display device 1.
  • air is able to circulate within the sealed interior including flowing upwardly through the backlight cavity 8, rearwardly towards the airflow heatsink 12, and then down past the airflow heatsink 12.
  • the air is able to flow from an upper end of the backlight cavity 8, over an upper end of the backlight 6, and towards the first side 15 of the airflow heatsink 12.
  • Arrows 18 shown in Figure 6 indicate this air flow.
  • air flows upwardly through the backlight cavity 8 past the backlight 6, absorbing heat from the backlight 6 and electronic display 5.
  • the air then flows from the upper end of the backlight cavity 8 around the upper end of the backlight 6 towards the first side 15 of the airflow heatsink 12.
  • the air then flows downwardly behind the backlight 6 and past the first side 15 of the airflow heatsink 12 (e.g. between the fins 17) allowing heat to flow from the air to the airflow heatsink 12.
  • Figure 7 shows a portion of the lower end of the backlight cavity 8 of the electronic display device 1.
  • the electronic display device 1 comprises an electronics cavity 14 configured to house electronic components of the electronic display device 1.
  • the electronics cavity 14 is located below the backlight cavity 14. Air is able to flow from the first side 15 of the airflow heatsink 12 forwardly into the electronics cavity 14. The air is then able to flow through the electronics cavity 14 towards the lower end of the backlight cavity 8. This airflow is indicated by arrow 19 shown in Figure 7. Air is able to flow forwardly away from the airflow heatsink 12 into the electronics cavity and then upwardly towards the lower end of the backlight cavity 8. Air can then flow upwardly through the backlight cavity 8 as described above.
  • the electronics cavity 14 is provided at a lower end of the electronic display device 1.
  • the air circulating within the sealed interior is cooled as it passes along the first side 15 of the airflow heatsink 12, immediately before flowing through the electronics cavity 14. This means that the air is coolest when it flows through the electronics cavity 14. Keeping the electronics cavity 14 cool, along with the electronic components housed within the electronics cavity 14 may prevent the electronic components from being damaged by heat or at least may improve the operating life of some or all of the electronic components.
  • Figure 8 shows the electronics cavity 14 and a lower portion of the backlight cavity 8. Air is able to circulate within the sealed interior of the housing including flowing from the electronics cavity 14 to the backlight cavity 8. In this embodiment, as the electronics cavity 14 is provided below the backlight cavity 8, air flows upwards when flowing from the electronics cavity 14 to the backlight cavity 8.
  • the electronic display device 1 may comprise one or more fans configured to circulate air within the sealed interior of the housing 2.
  • the electronic display device comprises three fans 20.
  • the fans 20 are located within the electronics cavity 14 of the electronic display device 1.
  • Figure 8 shows a cutaway view down the middle of the electronic display device 1, showing the location of one of the fans 20.
  • the other two fans 20 are located on either side of the fan 20 shown in Figure 8 within the electronics cavity 14.
  • Figure 3 shows all three fans 20.
  • the electronic display device 1 may comprise only one fan or may comprise two, four or more fans 20.
  • the fans 20 may be provided proximate one another or may be provided at multiple locations within the flow path of the air circulating within the sealed interior.
  • the housing 2 comprises a baffle 26 to which the fans 20 are mounted.
  • the baffle 26 includes holes through which the fans 20 blow air.
  • the baffle 26 prevents air from flowing in the opposite direction (e.g. circulating about the fans).
  • the baffle 26 may not be provided, for example if the fans 20 may provide sufficient overall air flow for the cooling requirements of a particular implementation without a baffle 26.
  • the fans 20 are configured to generate an airflow upwards through the backlight cavity 14 and downwards past the airflow heatsink 12. Since the temperature of the air will increase within the backlight cavity 14, due to receiving heat from the backlight 6 and electronic display panel 5, the air will naturally tend to rise within the backlight cavity 14 due to convection. Accordingly, in the absence of any forced convection from fans, the air will tend to flow upwards through the backlight cavity 14 and back downwards past the first side 15 of the airflow heatsink 12. In some embodiments of the invention, no fans are provided and this naturally occurring air circulation is sufficient to keep the sealed interior of the housing 2 at an acceptable temperature. In the illustrated embodiment, the fans 20 advantageously assist air to circulate in this same direction. If the fans 20 were configured to blow air in the opposite direction, the fans 20 would first need to counteract and overcome the airflow produced by convection before forcing the air to circulate in the opposite direction.
  • Figure 10 shows a view of an airflow heatsink 12 in isolation.
  • the fins 17 on each of the first side 15 and second side 16 are visible in Figure 10.
  • the airflow heatsink 12 comprises a recess 23 on the first side thereof.
  • This recess 23 is a portion of the airflow heatsink 12 without fins 17.
  • a portion of some of the fins 17 are removed (e.g. by machining) to form the recess 23.
  • the recess is configured to receive a timing controller 24 (e.g. TCON board).
  • the timing controller 24 at least in the illustrated embodiment, is effectively part of the electronic display panel 5 and therefore cannot be moved to the electronics cavity 14.
  • providing a recess 23 in one of the heatsinks for the timing controller 24 may keep the overall thickness of the device low, which may provide for a slim and unobtrusive electronic display device 1.
  • the electronic display device 1 comprises both a backlight heatsink 9 and an airflow heatsink 12.
  • the electronic display device 1 comprises only a backlight heatsink 9 and no airflow heatsinks 12.
  • the backlight heatsink 9 may advantageously remove heat from the backlight 6 as described above, while other steps can be taken to remove heat from other components of the electronic display device 1.
  • the electronic display device 1 comprises one or more airflow heatsinks 12 but no backlight heatsink 9.
  • the airflow heatsink 12 may advantageously remove heat from a sealed interior of the electronic display device 1, including from the backlight 6.
  • the path along which air flows prior to flowing over the airflow heatsink 12 may be different from the path described with reference to the illustrated embodiment.
  • air does not flow through the backlight cavity 8.
  • sufficient cooling may be achieved even if air does not flow through the backlight cavity 8.
  • the housing 2 may comprise one or more vents.
  • the vents allow air from the surroundings of the electronic display device 1 to flow past and receive heat from the second side 11 of the backlight heatsink(s) 9 and/or the second side 16 of the airflow heatsink(s) 12.
  • the second side 11 of the backlight heatsink 9 and the second side 16 of the airflow heatsink 12 and the fins 17 thereof may be provided within a portion of the housing 2 that is vented to allow air from the surroundings to flow into the housing 2, absorb heat from the airflow heatsink 12, and flow out of the housing 2.
  • the housing 2 of the electronic display device 1 may comprise at least one upper vent and at least one lower vent.
  • Figure 2 shows a rear view of the illustrated electronic display device 1.
  • the housing 2 comprises upper vents 21 and lower vents 22.
  • the upper vents 21 are located at an upper portion of the housing 2 and the lower vents 22 are located at a lower portion of the housing 2.
  • the housing 2 is configured to allow an airflow past the second sides of the heatsinks within the housing 2.
  • air is able to flow in through one vent and out the other vent, allowing for an airflow past the second sides of the heatsinks within housing 2.
  • the upper vents 21 and the lower vents 22 are configured to allow air to flow from the surroundings into the lower vents 22, past the second side 11 of the backlight heatsink 9 and the second side 16 of the airflow heatsink 12 to receive heat from the backlight heatsink 9 and the airflow heatsink 12, and to then flow out of the upper vents 21.
  • the electronic display device 1 may comprise one or more fans to circulate air from the surroundings within the housing 2, for example if the electronic display device 1 is oriented horizontally and convection will not produce the chimney effect, or to a lesser extent. Fans may also be provided if additional cooling is required and/or noise is not an issue in a particular implementation.
  • the backlight heatsink 9 and the airflow heatsink 12 form a chassis of the electronic display device 1, in this example.
  • the backlight heatsinks 9 (two in this embodiment) and airflow heatsinks 12 (two in this embodiment) are connected together to form a substantially rigid structure within the electronic display device.
  • the backlight 6 and housing 2 are secured to and supported by the backlight heatsink 9 and the airflow heatsink 12.
  • a pre-made sealed display screen unit is inserted into a semi- or fully-waterproof enclosure and may require two chassis.
  • the pre-made screen unit incudes its own chassis (a first chassis), and the enclosure with which it is mounted either includes its own separate chassis or functions as a chassis (a second chassis), to support itself, the pre-made screen unit, heatsinks and any other components.
  • the electronic display device 1 comprises only one chassis.
  • the backlight heatsink 9 and the airflow heatsink 12 serve a dual purpose, forming a chassis which supports the other components of the electronic display device 1 as well as removing heat from the sealed interior.
  • the invention may also be said broadly to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, in any or all combinations of two or more of said parts, elements or features. Where in the foregoing description reference has been made to integers or components having known equivalents thereof, those integers are herein incorporated as if individually set forth.

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

Abstract

L'invention concerne un dispositif d'affichage électronique comprenant : un boîtier définissant au moins partiellement un intérieur étanche ; un écran d'affichage électronique disposé à l'intérieur de l'intérieur étanche pour afficher des images et/ou des vidéos à des spectateurs du dispositif d'affichage électronique ; un rétroéclairage pour l'écran d'affichage électronique, le rétroéclairage étant disposé à l'intérieur de l'intérieur étanche ; et un dissipateur thermique de rétroéclairage ayant un premier côté à l'intérieur de l'intérieur étanche et un second côté opposé au premier côté, le premier côté du dissipateur thermique de rétroéclairage étant en contact avec le rétroéclairage pour évacuer la chaleur du rétroéclairage, le second côté du dissipateur thermique de rétroéclairage étant à l'extérieur de l'intérieur étanche pour libérer la chaleur évacuée du rétroéclairage vers l'environnement du dispositif d'affichage électronique.
PCT/NZ2021/050014 2020-02-07 2021-02-09 Dispositif d'affichage électronique à gestion thermique améliorée WO2021158128A1 (fr)

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US62/971,710 2020-02-07

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5991153A (en) * 1997-10-31 1999-11-23 Lacerta Enterprises, Inc. Heat transfer system and method for electronic displays
EP1253459A2 (fr) * 2001-04-23 2002-10-30 Gilbarco Inc. Régulation thermique pour un boítier mince et étanche à l'environnement d'un affichage à LCD
US20070081344A1 (en) * 2005-10-11 2007-04-12 Bart Cappaert Display assemblies and methods of display
US20110001898A1 (en) * 2008-03-25 2011-01-06 Nec Corporation Liquid crystal display device
KR20190065873A (ko) * 2017-12-04 2019-06-12 엘지전자 주식회사 디스플레이 냉각장치
US20190182981A1 (en) * 2017-12-12 2019-06-13 Wistron Corporation Display assembly with heat dissipation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5991153A (en) * 1997-10-31 1999-11-23 Lacerta Enterprises, Inc. Heat transfer system and method for electronic displays
EP1253459A2 (fr) * 2001-04-23 2002-10-30 Gilbarco Inc. Régulation thermique pour un boítier mince et étanche à l'environnement d'un affichage à LCD
US20070081344A1 (en) * 2005-10-11 2007-04-12 Bart Cappaert Display assemblies and methods of display
US20110001898A1 (en) * 2008-03-25 2011-01-06 Nec Corporation Liquid crystal display device
KR20190065873A (ko) * 2017-12-04 2019-06-12 엘지전자 주식회사 디스플레이 냉각장치
US20190182981A1 (en) * 2017-12-12 2019-06-13 Wistron Corporation Display assembly with heat dissipation

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