Display and thermal management systems

Abstract

The disclosed display (100, 600) includes a housing (102, 602) having a frame (106) and a first window (104, 604) attached to the frame; a first display element (108, 608) disposed within the housing, facing the first window, parallel to the first window, and separated from the first window by a first gap (110, 612); and cooling air channels (112, 402, 502, 504, 506) for the flow of cooling air (214, 614) passing through therein, wherein the cooling air channels are partially located inside the housing and the first display The device comprises a first air circulation system (116, 618) arranged to circulate a first air (204) confined within the Ray element, and a second air circulation system (114, 616) arranged to circulate a second air (202) between a first void and a heat exchanger channel (118, 404, 508, 510, 512), wherein the cooling air channel, the first air circulation system, and the second air circulation system are airtight with respect to each other, the first air circulation system is thermally coupled to the cooling air channel, and the second air circulation system is thermally coupled to the cooling air channel via the heat exchanger channel.

Description

【Technical Field】 【0001】 The present disclosure relates to a display. 【Background Art】 【0002】 Outdoor display screens have become increasingly popular in recent years due to their ability to attract attention and draw in viewers. One of the most common uses of outdoor display screens is for advertising purposes. Outdoor display screens can be used to display dynamic and eye-catching content such as videos, animations, and images, which can quickly draw the attention of people passing by. As a result, companies and organizations can use outdoor display screens to promote their products, services, or events to a large number of viewers in a very effective and attractive way. Typically, outdoor display screens are located in high-traffic areas such as shopping malls, airports, and the centers of busy cities. Additionally, outdoor display screens can also be used to provide the public with information such as weather forecasts, news headlines, or event schedules. They can also be used for entertainment purposes such as displaying live sports events or concerts. 【0003】 However, conventional outdoor display screens are vulnerable to weather conditions. Outdoor display screens are often exposed to harsh weather conditions such as rain, wind, snow, and extreme temperatures, which can damage or destroy the screen and other electronic components. This can result in costly repairs or replacements and downtime. Typically, LCD panels placed in outdoor display screens used in outdoor environments, especially those placed in direct sunlight, are extremely susceptible to high temperatures. Conventional outdoor display screen LCD panels usually cannot withstand temperatures above 65°C. Temperatures above 65°C can cause permanent damage to the LCD panel. Typically, the LCD panel will suffer from pixel burn or darkening. Large panels are difficult and expensive to replace. 【0004】 Current solutions involve using outside air (such as natural air) to cool the LCD panel, but using outside air requires filters to prevent the intrusion of dust and dirt. However, filters have the drawback of requiring frequent replacement. Furthermore, to avoid the intrusion of dust and dirt and the use of filters, a compressor is used to provide clean air. However, the use of a compressor increases the operating cost of outdoor display screens and requires regular maintenance. In some cases, the use of more elastic LCD panels that can withstand temperatures exceeding 100°C is employed. However, panels of this quality are not universally and frequently available. 【0005】 Therefore, in light of the above discussion, it is necessary to overcome the aforementioned shortcomings. [Overview of the project] 【0006】 The object of the present invention is to provide a device that effectively dissipates internal heat. The object of this disclosure is achieved by a display as defined in the attached independent claim referenced. Advantageous features are described in the attached dependent claims. 【0007】 In a first aspect, one embodiment of the present disclosure provides the display described in claim 1. 【0008】 Throughout this specification and the claims, the words “comprise,” “include,” “have,” and “contain,” as well as their variations, such as “comprising” and “comprises,” mean “including but not limited to,” and do not exclude other components, integers, or steps. Furthermore, the singular form includes the plural form unless the context requires a different interpretation. In particular, where the indefinite article is used, this specification should be understood to intend both the singular and the plural unless the context requires a different interpretation. [Brief explanation of the drawing] 【0009】 [Figure 1] This is a schematic diagram of a cross-sectional view of a display according to one embodiment of the present disclosure. [Figure 2] This is a schematic perspective view of a first windowless display 100 for depicting airflow, according to one embodiment of the present disclosure. [Figure 3] This is a schematic diagram of a top cross-sectional view of a display according to one embodiment of the present disclosure. [Figure 4] This is a schematic diagram of a top cross-sectional view of a display according to one embodiment of the present disclosure. [Figure 5] This is a schematic diagram of an alternating side-by-side arrangement of cooling air channels and heat exchanger channels according to one embodiment of the present disclosure. [Figure 6] This is a schematic diagram of a display implemented as a double-sided display according to one embodiment of the present disclosure. [Modes for carrying out the invention] 【0010】 The following detailed description illustrates embodiments of the disclosure and possible ways in which they may be implemented. While several modes of implementing the disclosure are disclosed, those skilled in the art will recognize that other embodiments for implementing or practicing the disclosure are also possible. 【0011】 In the first aspect, the Disclosure provides a display, and the display is A housing having a frame and a first window attached to the frame, • A first display element, located within the housing, facing a first window, parallel to the first window, and separated from the first window by a first gap, • A cooling air channel for the flow of cooling air through a cooling air channel, wherein the cooling air channel is partially located inside the housing, • A first air circulation system arranged to circulate the first air confined within the first display element, The system comprises a second air circulation system arranged to circulate a second air between a first void and a heat exchanger channel, The cooling air channel, the first air circulation system, and the second air circulation system are airtight with respect to each other. • The first air circulation system is thermally coupled to the cooling air channel. • A second air circulation system is thermally coupled to the cooling air channel via a heat exchanger channel. 【0012】 The present invention provides a display for effectively dissipating heat from the display. The display is designed such that a first air circulation system and a second circulation system within the display allow heat to be rapidly removed from the display before the temperature inside the display reaches a high temperature. As a result, the display is beneficially protected from any damage due to overheating. Advantageously, the display is suitable for installation in environments with extreme weather conditions (e.g., high temperatures, heavy rain, snowfall, etc.). Furthermore, the display does not rely on the entry of outside air for its cooling and requires minimal maintenance. 【0013】 Throughout this disclosure, the term “Display” refers to a display screen that displays visual information from a wired or wireless source. Depending on the embodiment, a Display may include, but is not limited to, a television, monitor, computer monitor, laptop computer, or personal computer. Depending on the embodiment, a Display may be selected from liquid crystal displays (LCDs), light-emitting diodes (LEDs), backlit LCDs, thin-film transistor (TFT) LCDs, organic LEDs (OLEDs), quantum dot (QLED) displays, OLED displays, AMOLED displays, and super AMOLED displays. Depending on the embodiment, a Display may be used as one of the following: an advertising billboard, an electronic scoreboard, or an announcement board in a train station or airport. 【0014】 The display comprises a housing having a frame and a first window mounted to the frame. Throughout this disclosure, the term “housing” refers to a casing or shell that acts as a protective cover positioned on the outer boundary of the display. In particular, the housing acts as a weatherproof casing that protects the display from extreme weather conditions such as rain or snowfall. The frame, which is the opaque portion of the housing, will be understood to be positioned around the display. Depending on the embodiment, the frame may be made of a metallic or non-metallic material, depending on the purpose for which the display is to be used. Throughout this disclosure, the term “first window” refers to a transparent portion of the housing that is positioned in front of the display and allows viewing of the content displayed on the display through the first window. Depending on the embodiment, the first window may be made of glass. 【0015】 Furthermore, the display comprises a first display element located within a housing, facing and parallel to a first window, and separated from the first window by a first void. Throughout this disclosure, the term “first display element” refers to the basic elements of the display required to render information to be displayed on the display in the form of pixels. In some embodiments, the first display element includes an LCD cell. In particular, by arranging the first display element parallel to and facing the first window, the information displayed on the first display element becomes visible to the outside world because the first window is transparent. It will be understood that heat is generated by the first display element while displaying information. The first display element also absorbs heat from the external atmosphere (e.g., from sunlight hitting the display). Throughout this disclosure, the term “first void” refers to the airtight space between the first window and the first display element. In particular, the presence of the first void allows for air circulation between the first window and the first display element. In particular, some of the heat generated inside the display is confined within the first display element, while the remaining heat inside the display resides in the first gap between the first window and the first display element. 【0016】 In some embodiments, the first display element is arranged as a stack of a first optical modulator, a first optical diffuser, and a first backlight, the first optical diffuser being positioned between the first optical modulator and the first backlight, the first optical modulator and the first optical diffuser having a second gap between them, the first optical diffuser and the first backlight having a third gap between them, and the first display element being enclosed within a casing so as to confine a first air within the casing. Throughout this disclosure, the term “first optical modulator” refers to an optical device that modulates the intensity or phase of light to create a desired image on the display. Throughout this disclosure, the term “first optical diffuser” refers to an optical element that scatters light rays in different directions to produce a uniform and even distribution of light. Throughout this disclosure, the term “first backlight” refers to a component that provides the illumination necessary to display an image on the display. The technical effect of arranging the first display element as a stack of a first optical modulator, a first optical diffuser, and a first backlight is that the stack enables rendering an image on the display with sharpness and accuracy. In particular, the stack is arranged in the display such that the side of the stack where the first optical modulator is located is positioned near the first window, and the other side of the stack where the first backlight is located is positioned near the cooling air channel. In this specification, the term “second void” refers to the hollow space between the first optical modulator and the first optical diffuser. Similarly, the term “third void” refers to the hollow space between the first optical diffuser and the first backlight. Advantageously, the presence of the second and third voids provides passages for the circulation of the first air confined within the first display element. Furthermore, according to one embodiment, the first backlight is thermally coupled to the cooling air channel. They are, for example, in physical contact with the cooling air channel. 【0017】 Furthermore, the device comprises a cooling air channel for the flow of cooling air through the cooling air channel, wherein the cooling air channel is partially located inside the housing. Throughout this disclosure, the term “cooling air channel” refers to an air channel that acts as a passage for cooling air to pass through and thus enables heat exchange within the display. In this specification, cooling air channels may have fins on their inner or outer surfaces that enable the cooling air channel to provide more efficient heat exchange with the cooling air. Each cooling air channel should be understood to be fabricated from thin walls that increase the number of cooling air channels, increase the surface area of ​​cooling air channels present in the display, and reduce friction of the cooling air flowing through the cooling air channel. In particular, the cooling air channel enables heat exchange by absorbing heat present in the device. Subsequently, heat exchange with the cooling air in the cooling air channel results in the removal of heat from the display. It will be understood that the cooling air channel is fabricated from a thermally conductive material that facilitates heat exchange within the cooling air channel. In some embodiments, the cooling air channel is integrated on the backlight plate of the first display element to make cooling more effective and optimize the use of materials. Depending on the embodiment, the backlight plate may have vertical perforations to allow air from inside the LCD enclosure to mix with the internal air circulation to enhance cooling. 【0018】 In some embodiments, a cooling air channel is located through the housing between a first edge and a second edge of the frame, where the first and second edges are opposing edges of the frame, and cooling air is entered into the cooling air channel through a first opening located at the first edge and exited through a second opening at the second edge. In this regard, the cooling channel is located within the display along the entire length of the housing between the two opposing edges of the housing, which are the first and second edges. In particular, both the first and second edges of the housing are located around two opposing edges surrounding the display. The technical effect of locating the first and second openings at the first and second edges, respectively, is that cool air from the external atmosphere can enter the display through the first opening, and heat can be removed from the display through the second opening via the cooling air channel. In addition, when the first opening is located at the top of the display, there is no need to use an additional air filter inside the display, allowing clean, cool air to enter the display, making cooling more effective and making display maintenance easier. 【0019】 Furthermore, the device includes a first air circulation system arranged to circulate first air confined within the first display element. Throughout this disclosure, the term "first air circulation system" refers to a system that enables the circulation of first air within the first display. In this specification, the first air includes heat generated when the first display element displays information. It will be understood that the circulation of the first air in the first circulation system facilitates the movement of the heat generated in the first display element towards the cooling air channel so that heat exchange occurs between the first air and the cooling air channel. Additionally, it becomes easier to promote the transfer of heat from the first air circulation system to the second air circulation system. This advantage is that efficient cooling can be performed on the heat dissipated by the backlight. A portion of the heat is exchanged due to the circulation of (backlight-heated) air from the third void to the second void. The second void is thermally coupled to the second air circulation system and thus enables the cooling of the air in the first air circulation system. 【0020】 In some embodiments, the first air circulation system is arranged to circulate first air confined within the first display element by circulating the first air between the second void and the third void. In this regard, the hollow spaces present in the second and third voids are used for the circulation of the first air confined within the first display element. The technical effect of circulating the first air between the second void and the third void is that heat exchange occurs easily when the first air is present in the third void because the third void is located near the cooling air channel. 【0021】 Furthermore, the device includes a second air circulation system configured to circulate a second air between the first void and the heat exchanger channel. Throughout this disclosure, the term “second air circulation system” refers to a system separate from the first circulation system that enables the circulation of the second air. In this specification, the second air includes a portion of the heat generated in the first display element that is present in the first void. Throughout this disclosure, the term “heat exchanger channel” refers to a channel configured to receive the second air from the first void in order to provide a medium for heat exchange to occur between the second air channel and the cooling air channel. Each heat exchanger channel should be understood to be fabricated from a thin wall that increases the number of heat exchanger channels, increases the surface area of ​​the cooling air channel present in the display, and reduces the friction of the second air flowing through the heat exchanger channel. In particular, the second air circulation system enables a portion of the heat escaping from the first display element to be moved from the first void to the heat exchanger channel. Subsequently, some of the heat is removed from the display by heat exchange between the heat exchanger channel and the cooling air channel. It will be understood that the heat exchanger channel is lined with insulating material to prevent heat in the second air from mixing with heat in the first air and significantly raising the temperature inside the display, causing damage to the display. In some embodiments, the cooling air channel is integrated on the backlight plate of the first display element to make cooling more effective and optimize material usage. 【0022】 In some embodiments, the active cooling element is disposed within the heat exchanger channel. Throughout this disclosure, the term "active cooling element" refers to an element that provides a cooling effect by enabling heat transfer. The technical effect of disposing an active cooling element within the heat exchanger channel is, beneficially, to increase the transfer of heat exchanged within the heat exchanger channel and effectively reduce the temperature inside the display. In some embodiments, the active cooling element is a Peltier element (i.e., a thermoelectric cooler). The Peltier element is positioned at a second edge, i.e., the bottom of the heat exchanger channel, whereby the hot first air flowing in front of the first display element is cooled by the Peltier element, and the excess heat generated by the Peltier element is discharged by the cooling air. This further cools the first display element without generating additional heat elsewhere within the display housing. 【0023】 In some embodiments, the cooling air channels and the heat exchanger channels are arranged side by side in an alternating pattern with respect to each other, thermally coupled to each other, forming a mat of air channels, and the mat is parallel to the first display element. In this regard, each of the cooling air channels is disposed between two of the heat exchanger channels. Similarly, each of the heat exchanger elements is disposed between two of the cooling air channels. As used herein, a mat of air channels refers to an alternating side-by-side arrangement of cooling air channels and heat exchanger channels extending across the entire length and width of the display. The technical effect of arranging the cooling air channels and the heat exchanger channels side by side in an alternating pattern is that heat exchange with the cooling air channels occurs using both the first air circulation system and the second air circulation system simultaneously, increasing the amount of heat removed from the display. 【0024】 In some embodiments, a first air circulation system is arranged to circulate first air around a first light diffuser in a first direction, and a second air circulation system is arranged to circulate second air around a first display element in a second direction, the second direction being perpendicular to the first direction. In this disclosure, the term "first direction" refers to the direction in which the first air circulates around the first light diffuser. The first direction is parallel to the axis in which the first light diffuser is located. In this disclosure, the term "second direction" refers to the direction in which the second air circulates around the first display element. The second direction is parallel to the axis in which the first display element is located. The fact that the second direction is perpendicular to the first direction will be understood to mean that the first air and the second air flow alternately intertwined. In some embodiments, the second direction may be parallel to the first direction. The technical effect of circulating the first air in a first direction and the second air in a second direction is that the first and second air do not mix with each other, and therefore cooling is more effective, and that it is possible to deliver hot air from both sides of the first display element simultaneously. Depending on the embodiment, the first and second directions are interchangeable. 【0025】 In some embodiments, the cooling air channel of the air channel mat has a first flat outer surface positioned to contact the outer surface of the backlight of a first display element, and the heat exchange channel has a first insulating configuration for insulating the heat exchange channel from the outer surface of the backlight. The technical effect of the first flat outer surface of the cooling air channel positioned to contact the outer surface of the backlight is that when the first flat outer surface is positioned to contact the outer surface of the backlight, heat from the second air present in a third void above the backlight is easily transferred to the cooling air channel. The technical effect of the first insulating configuration insulating the heat exchange channel from the outer surface of the backlight is that heat from the heat exchange channel is prevented from being transferred to the third void and accumulating together with the heat present in the second air, which is beneficial in preventing damage to the display due to an overall increase in heat within the display. In some embodiments, the insulating configuration can be made by leaving a space between the heat exchange channel and the outer surface of the backlight, and the shape of the space can be a square, a triangle, half a circle, or half an ellipse. In some embodiments, an insulating configuration can be achieved by using a rectangular aluminum extruded product having only cooling air channels, where the heat exchanger channels are located between the cooling air channels and are formed by the sides of the aluminum extruded product used to form the cooling air channels. 【0026】 Furthermore, the cooling air channel, the first air circulation system, and the second air circulation system are airtight with respect to each other. In this regard, each of the cooling air channel, the first air circulation system, and the second air circulation system operates independently but is integrated into the same display. Subsequently, the airtight configuration between the cooling air channel, the first air circulation system, and the second air circulation system makes it possible to prevent any mixing or contamination of the air between the cooling air channel, the first air circulation system, and the second air circulation system, further prevents any heat exchange between them, and further avoids the use of filters at the outside air inlet. Optionally, the cooling air channel, the first air circulation system, and the second air circulation system are designed to have sealed connections and be physically separated from each other to ensure that the cooling air channel, the first air circulation system, and the second air circulation system are airtight with respect to each other. 【0027】 The term "airtight" refers to a setup where air and dust are not exchanged between circulation systems, and not to a degree that would be detrimental to the operation of the display. The cooling air channel is exposed to the outside air (of the display) and is therefore likely to have dust and contamination. The second air circulation system is positioned to be (completely airtight / airtight) sealed from the cooling air. However, small openings / cracks may appear between the cooling air channel and the second air circulation system over time. These can be caused by vibration of the display, aging, impact, manufacturing defects, vandalism, etc. For this reason, small amounts of dust and other impurities may accumulate in the second air circulation system over time. Since the first air circulation system is even more airtight than the second air circulation system, any impurities (from cracks) in the second air circulation system are not significant to the functionality of the first display element. This hierarchical air circulation system structure allows for keeping the internal structure of the first display element clean. Furthermore, the first air circulation system is thermally coupled to the cooling air channel. In this regard, the thermal coupling between the first air circulation system and the cooling air channel enables effective heat transfer between the first air circulation system and the cooling air channel. Thus, heat present in the first air is transferred from the first air circulation system to the cooling air channel, from which heat is removed from the display. 【0028】 Furthermore, the second air circulation system is thermally coupled to the cooling air channel via a heat exchanger channel. In this regard, the thermal coupling between the second air circulation system and the cooling air channel via the heat exchanger channel enables effective heat transfer between the second air circulation system and the cooling air channel. Thus, the heat present in the second air first flows from the first void to the heat exchanger channel, and then the heat is transferred from the heat exchanger channel to the cooling air channel, from which heat is removed from the display. 【0029】 In some embodiments, the display further comprises a second window opposite the first window, and a second display element located within the housing, facing the second window, parallel to the second window, and separated from the second window by a fourth gap. In this specification, the second window refers to another window located within the display, having the same design, configuration, and operation as the first window. Similarly, the second display element is another display element located within the display, having the same design, configuration, and operation as the first display element. In this specification, the fourth gap refers to the hollow space between the second window and the second display element. In this regard, the display comprises a first window and a second window on two opposing faces of the display, the first display element being located facing the first window, and the second display element being located facing the second window. The displayed information can then be viewed from the two opposing faces of the display. The technical effect of a display comprising a second window opposite the first window and a second display element located within the housing and facing the second window is, beneficially, that the display functions as a double-sided display. 【0030】 In some embodiments, the second display element comprises a third air circulation system arranged to circulate a third air confined within the second display element, and a fourth air circulation system arranged to circulate a fourth air between a fourth void and a heat exchanger channel. Throughout this disclosure, the term “third air circulation system” refers to an air circulation system that enables the circulation of the third air within the second display element. In particular, the heat generated in the second display element is present in the third air. Throughout this disclosure, the term “fourth air circulation system” refers to an air circulation system that enables the circulation of a fourth air between a fourth void and a heat exchanger channel. The technical effect of the second display element comprising the third air circulation system and the fourth circulation system is that the heat generated in the second display element is removed from the display in the same manner as the heat generated by the first display element is removed from the display. 【0031】 In some embodiments, each air circulation system circulates its corresponding air using individually controllable fans, and each individually controllable fan is dedicated to a different air circulation system. Throughout this disclosure, the term “controllable fan” refers to a fan that can be controlled to operate at different speeds to facilitate the circulation of air within the corresponding air circulation system in which it is installed. In particular, each controllable fan is controlled individually, without any dependence on the rest of the controllable fans present in the display. In some embodiments, the individually controllable fans are controlled via pulse-width modulation or a change in the voltage supplied to the individually controllable fan. The technical effect of each individually controllable fan being dedicated to a different air circulation system is that the corresponding air circulating within a given air circulation system can be kept isolated from other different air circulation systems. Advantageously, by individually controlling the controllable fans, the display can use only the power it needs, thus contributing to power savings. 【0032】 Depending on the embodiment, the display can be placed in an outdoor environment. In this regard, when the display is placed in an outdoor environment, any heat generated within the display due to any sunlight incident on the display is effectively dissipated from the display using the first air circulation system and the second circulation system. The technical advantage of the display being able to be placed in an outdoor environment is that the display can withstand extreme weather conditions (such as high temperatures in an outdoor environment) without being damaged. 【0033】 In one embodiment, when the display is placed in an outdoor environment where the temperature is below a threshold temperature, the heat generated by the display is significantly less. Subsequently, only individually controllable fans located in a second air circulation system operate, and therefore, heat from the display is removed using only the second air circulation system. Consequently, the power required for the display is greatly reduced. 【0034】 Detailed description of the drawing Referring to Figure 1, a schematic cross-sectional view of a display 100 according to one embodiment of the present disclosure is shown. As shown in Figure 1, the display 100 comprises a housing 102 having a frame 106 and a first window 104 mounted on the frame 106. The display 100 includes a first display element 108 located within the housing 102, facing the first window 104, parallel to the first window 104, and separated from the first window 104 by a first gap 110. The display 100 also comprises a cooling air channel 112 for the flow of cooling air through the cooling air channel 112, which is partially located inside the housing 102. The display 100 includes a first air circulation system 116 arranged to circulate a first air sealed in a first display element 110, and a second air circulation system 114 arranged to circulate a second air between the first air gap 110 and a heat exchanger channel 118. Furthermore, the cooling air channel 112, the first air circulation system 116, and the second air circulation system 114 are airtight with respect to each other. In addition, the first air circulation system 116 is thermally coupled to the cooling air channel 112, and the second air circulation system 114 is thermally coupled to the cooling air channel 112 via the heat exchanger channel 118. 【0035】 In some embodiments, the first display element 108 is arranged as a stack of a first optical modulator 120, a first optical diffuser 122, and a first backlight 124, the first optical diffuser 122 being positioned between the first optical modulator 120 and the first backlight 124, the first optical modulator 120 and the first optical diffuser 122 having a second gap 126 between them, and the first optical diffuser 122 and the first backlight 124 having a third gap 128 between them. 【0036】 Referring to Figure 2, a schematic perspective view of a first windowless display 100 depicting airflow according to one embodiment of the present disclosure is shown. The display 100 includes a cooling air channel for the flow of cooling air through the cooling air channel. As shown, a first air circulation system 116 is arranged to circulate a first air 204 confined within a first display element 108, and a second air circulation system 114 is arranged to circulate a second air 202. The first air 204 is confined and circulates within the first display element 108. The second air 202 circulates between the first gap 110 and the heat exchanger channel 118. 【0037】 The cooling air channel is located between the first edge 206 and the second edge 208 of the frame 106, passing through the housing, where the first edge 206 and the second edge 208 are opposing edges of the frame 106. Cooling air enters the cooling air channel through the first opening 210 located at the first edge 206 and exits through the second opening 212 at the second edge 208. A first air circulation system 114 is arranged to circulate the first air 204 around the first light diffuser 122 in a first direction, and a second air circulation system 116 is arranged to circulate the second air 202 around the first display element 108 in a second direction, where the second direction is perpendicular to the first direction. Furthermore, the cooling air 214 flows through the cooling air channel 112. 【0038】 Referring to Figure 3, a schematic upper cross-sectional view of a display 100 according to one embodiment of the present disclosure is shown. The display 100 comprises a housing 102 having a frame 106 and a first window 104 mounted on the frame 106. The display 100 includes a first display element 108 located within the housing 102, facing the first window 104, parallel to the first window 104, and separated from the first window 104 by a first gap 110. In some embodiments, the first display element 108 is arranged as a stack of a first optical modulator 120, a first optical diffuser 122, and a first backlight 124, the first optical diffuser 122 being positioned between the first optical modulator 120 and the first backlight 124, the first optical modulator 120 and the first optical diffuser 122 having a second gap 126 between them, and the first optical diffuser 122 and the first backlight 124 having a third gap 128 between them. 【0039】 Referring to Figure 4, a schematic perspective view of an air channel mat 400 according to one embodiment of the present disclosure is shown. As shown in Figure 4, the air channel mat has alternating layers of cooling air channels 402 and heat exchanger channels 404, the heat exchanger channels 404 being made of insulating material to isolate the first air and the second air from each other. 【0040】 Referring to Figure 5, a schematic diagram of an alternating side-by-side arrangement of cooling air channels and heat exchanger channels according to one embodiment of the present disclosure is shown. As shown in Figure 5, each of the cooling air channels (depicted as the first cooling air channel 502, the second cooling air channel 504, and the third cooling air channel 506) is sequentially positioned relative to one of the heat exchanger channels (depicted as the first heat exchanger channel 508, the second heat exchanger channel 510, and the third heat exchanger channel 512). Similarly, each of the heat exchanger channels 508, 510, and 512 is sequentially positioned relative to one of the cooling air channels 502, 504, and 506. For example, the first heat exchanger channel 508 is sequentially positioned relative to the first cooling air channel 502, and the second cooling air channel 504 is sequentially positioned relative to the first heat exchanger channel 508. In this specification, cooling air 514 flows from top to bottom in cooling air channels 502, 504 and 506, each having first flat outer surfaces 502', 504' and 506' positioned to be in contact with the outer surface of the backlight 518; second air 516 flows from bottom to top in heat exchanger channels 508, 510 and 512, each having first insulating configurations 508', 510' and 512' to insulate the heat exchanger channels 508, 510 and 512 from the outer surface of the backlight 518. In the example of Figure 5, the insulating configuration is a cavity containing air. 【0041】 Referring to Figure 6, a schematic diagram of a display 600 implemented as a double-sided display according to one embodiment of the present disclosure is shown. As shown in Figure 6, the display 600 comprises a housing 602. The display 600 comprises a first window 604 and a second window 606 opposite the first window 604. Furthermore, the device 600 comprises a first display element 608 disposed within the housing 602 parallel to the first window 604 and a second display element 610 disposed within the housing 602 parallel to the second window 606. The first window 604 is separated from the first display element 608 by a first gap 612, and the second window 606 is separated from the second display element 610 by a fourth gap 614. The first display element 608 comprises a first air circulation system 618 and a second air circulation system 616. Furthermore, the second display element 614 includes a third air circulation system 622 and a fourth air circulation system 620.

Claims

[Claim 1] The display (100,600) A housing (102, 602) having a frame (106) and first windows (104, 604) attached to the frame, A first display element (108, 608) is disposed within the housing, facing the first window, parallel to the first window, and separated from the first window by a first gap (110, 612), Cooling air channels (112, 402, 502, 504, 506) for the flow of cooling air (214, 514) passing through, wherein the cooling air channels are partially located inside the housing, A first air circulation system (116, 618) is arranged to circulate the first air (204) confined within the first display element, The system comprises a second air circulation system (114, 616) arranged to circulate a second air (202, 516) between the first void and the heat exchanger channels (118, 404, 508, 510, 512), The cooling air channel, the first air circulation system, and the second air circulation system are airtight with respect to each other. The first air circulation system is thermally coupled to the cooling air channel, The second air circulation system is thermally coupled to the cooling air channel via the heat exchanger channel. Display (100, 600). [Claim 2] The display (100, 600) according to claim 1, wherein the first display elements (108, 608) are arranged as a stack of a first optical modulator (120), a first light diffuser (122), and a first backlight (124), the first light diffuser is positioned between the first optical modulator and the first backlight, the first optical modulator and the first light diffuser have a second gap (126) between them, the first light diffuser and the first backlight have a third gap (128) between them, and the first display elements are enclosed within the casing such that the first air (202) is confined within the casing. [Claim 3] The display (100, 600) according to claim 1 or 2, wherein the cooling air channels (112, 402, 502, 504, 506) are arranged through the housing (102, 602) between a first edge (206) and a second edge (208) of the frame (106), the first edge and the second edge being opposing edges of the frame, and the cooling air (214, 514) is input into the cooling air channels from a first opening (210) of the cooling air channels arranged through the first edge and output from a second opening (212) of the cooling air channels through the second edge. [Claim 4] The display (100, 600) according to claim 2 or 3, wherein the first air circulation system (114, 616) is arranged to circulate the first air (204) confined within the first display element (108, 608) by the first air (204) circulating between the second void (126) and the third void (128). [Claim 5] The display (100, 600) according to any one of claims 1 to 4, wherein the cooling air channels (112, 402, 502, 504, 506) and the heat exchanger channels (118, 404, 508, 510, 512) are arranged alternately side by side with respect to each other, are thermally coupled to each other, form an air channel mat (400), and the mat is parallel to the first display elements (108, 608). [Claim 6] The display (100, 600) according to any one of claims 2 to 5, wherein the first air circulation system (116, 618) is arranged to circulate the first air (204) around the first light diffuser (122) in a first direction, and the second air circulation system (114, 616) is arranged to circulate the second air (202, 516) around the first display element (108, 608) in a second direction, the second direction being perpendicular to the first direction. [Claim 7] The display (100, 600) according to claim 5 or 6, wherein the cooling air channels (112, 402, 502, 504, 506) of the air channel mat (400) have first flat outer surfaces (502', 504', and 506') positioned to contact the outer surface of the backlight (518) of the first display element (108, 608), and the heat exchanger channels (118, 404, 508, 510, 512) have first insulating configurations (508', 510', and 512') for insulating the heat exchanger channels from the outer surface of the backlight (518). [Claim 8] The display (100, 600) according to any one of claims 1 to 7, further comprising: a second window (606) located opposite to the first window (104, 604); and a second display element (610) disposed within the housing (102, 602), facing the second window, parallel to the second window, and separated from the second window by a fourth gap (614). [Claim 9] The display (100, 600) according to claim 8, further comprising: a second display element (610) comprising: a third air circulation system (622) arranged to circulate a third air trapped within the second display element; and a fourth air circulation system (620) arranged to circulate a fourth air between the fourth void (614) and the heat exchanger channels (118, 404, 508, 510, 512). [Claim 10] The display (100, 600) according to any one of claims 1 to 9, wherein each air circulation system circulates its corresponding air using individually controllable fans, and each individually controllable fan is dedicated to a different air circulation system. [Claim 11] The display (100, 600) according to any one of claims 1 to 10, wherein an active cooling element is arranged within the heat exchanger channels (118, 404, 508, 510, 512). [Claim 12] A display (100, 600) according to any one of claims 1 to 11, which can be placed in an outdoor environment.

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