Electronic display assembly and dual-sided display

Abstract

An electronic display assembly and a dual-sided display are provided. The electronic display assembly includes a housing having an opening, a display panel, an air exchange device, and a flow generator. The air exchange device is disposed in the opening of the housing. The flow generator generates an airflow through a path within the housing. A first portion of the path proximate the air exchange device is not parallel to a normal of the opening.

Description

TECHNICAL FIELD

[0001] The present invention relates to display devices. More particularly, the present invention relates to display devices having air exchange devices. BACKGROUND

[0002] As display devices are widely used in different environments, it has become an important issue to ensure the reliability and robustness of the display devices under harsh conditions. For example, if a display device is placed outdoors, sunlight can rapidly increase the temperature of the display device, where the heat and humidity accumulated in the optical cavity of the display device can deteriorate the commonly used functionality, possibly shorten the lifetime of the optical components, or even damage the optical components.

[0003] Generally, the optical cavity of a display device has a substantially air-tight design to prevent dust and other contaminants from entering. Unfortunately, the heat and humidity accumulated inside the display device cannot be dissipated to the external environment. The resulting thermal expansion of the gas in the optical cavity can deform the optical components such as liquid crystal panels, optical films, and diffusion plates. Such deformation problems are even more pronounced for high-brightness commercial display devices or display devices exposed to sunlight. SUMMARY

[0004] Therefore, there is a need for improved display devices that prevent the stated deficiencies to ensure that the display devices can continue to function properly and extend the lifetime of the display devices.

[0005] In one aspect according to some embodiments, an electronic display assembly is provided. The electronic display assembly includes a housing having an opening, a display panel, an air exchange device, and a flow generator. The air exchange device is disposed in the opening of the housing. The flow generator generates an airflow through a path within the housing. A first portion of the path near the air exchange device is not parallel to a normal of the opening.

[0006] In a preferred embodiment, the air exchange device includes a screen filter, a one-way air permeable valve, a two-way air permeable valve, or two valves with different directions.

[0007] In a preferred embodiment, when the first flow generator is operating, ambient air enters the housing of the electronic display assembly through the air exchange device and air inside the housing exits the electronic display assembly through the air exchange device.

[0008] In a preferred embodiment, the first flow generator is triggered when the temperature inside the electronic display assembly exceeds a threshold value.

[0009] In a preferred embodiment, the air exchange rate of the air exchange device is proportional to the speed of the internal airflow generated by the first flow generator.

[0010] In a preferred embodiment, the air exchange rate of the air exchange device is proportional to the size of the opening of the air exchange device.

[0011] In one aspect according to some embodiments, an electronic display assembly is provided. The electronic display assembly includes a housing, a transparent plate, a display module, an air exchange device, and a flow generator. The air exchange device is sealed with the housing for ventilating the electronic display assembly by airflow in more than one direction. The flow generator generates airflow between the transparent plate and the display module and through one side of the air exchange device.

[0012] In one aspect according to some embodiments, a dual-sided display is provided. The dual-sided display includes a first electronic display assembly as described, a second electronic display assembly as described, and a dual-sided housing having an opening. The dual-sided housing is for housing a portion of the first electronic display assembly and a portion of the second electronic display assembly.

[0013] Other aspects and embodiments of the present invention are also contemplated. The foregoing summary and the following detailed description are not meant to limit the present invention to any particular embodiment, but are merely meant to describe some embodiments of the present invention. BRIEF DESCRIPTION OF DRAWINGS

[0014] For a better understanding of the nature and objects of some embodiments of the present invention, reference should be made to the following detailed description taken in connection with the accompanying drawings. In the drawings, like or functionally identical components are given the same reference numerals, unless otherwise specified.

[0015] Figure 1 Cross-sectional view of an electronic display assembly according to some embodiments of the present invention.

[0016] Figure 2 Cross-sectional view of an electronic display assembly according to some embodiments of the present invention.

[0017] Figure 3 Cross-sectional view of an electronic display assembly according to some embodiments of the present invention.

[0018] FIGs. 4(a), 4(b), and 4(c) are schematic diagrams illustrating internal circulation airflow inside an optical cavity and disturbed airflow around an opening of an air exchange device of an electronic display assembly according to some embodiments of the present invention.

[0019] FIGs. 5(a), 5(b), and 5(c) are schematic diagrams illustrating simulation results of airflow rate of an air exchange device.

[0020] Figure 6 Cross-sectional view of a dual-sided liquid crystal display according to some embodiments of the present invention. DETAILED DESCRIPTION

[0021] The present disclosure provides electronic display assemblies or dual-sided displays with air exchange devices. The present disclosure further provides electronic display assemblies or dual-sided displays with dynamically adjustable airtight states inside the optical cavity. The present disclosure further provides electronic display assemblies or dual-sided displays with environmental regulation capabilities. Embodiments of the electronic display assemblies or dual-sided displays described herein include one or more air exchange devices. By using the air exchange devices, the pressure in the optical cavity (enclosure space) of the electronic display assemblies or dual-sided displays can be balanced with the pressure of the external environment. Due to the air exchange effect through the air exchange devices, the heat, humidity, or fine particles accumulated inside the optical cavity of the display can be expelled through the air exchange devices, thereby reducing the temperature, humidity, or density of fine particles inside the display. Embodiments of the electronic display assemblies or dual-sided displays described herein can effectively solve the deformation problem of the optical components inside the electronic display assemblies or dual-sided displays. In addition, the design of the filter material included in the air exchange devices prevents any size of contaminants from entering the display. Therefore, the electronic display assemblies and dual-sided displays of the present disclosure are suitable for outdoor use.

[0022] Figure 1 A cross-sectional view of an electronic display assembly according to some embodiments of the present disclosure. According to some embodiments of the present disclosure, the electronic display assembly 1 includes a housing 10, a display panel 12, an air exchange device 14, and a flow generator 16. According to some embodiments of the present disclosure, the electronic display assembly 1 can further include at least one of a backlight module 11, an optical film 13, a transparent plate 15, a flow generator 17, and a heat exchanger 20.

[0023] The transparent plate 15 can be disposed in the display opening of the front portion of the housing 10. For example, the display panel 12 can be a liquid crystal panel disposed between the transparent plate 15 and the backlight module 11. The optical film 13 can be disposed between the display panel 12 and the backlight module 11. For example, the optical film 13 can be a light diffuser, a light reflector, a brightness enhancement film, etc., or a combination of two or more thereof.

[0024] In this embodiment, for example, the electronic display assembly 1 is a liquid crystal display with a direct-type LED backlight module. For simplicity, the liquid crystal display with a direct-type LED backlight module is described in the following embodiments. Please note that a liquid crystal display with a side-type backlight module or an OLED display without the backlight module can also be used in the following embodiments, which is not limited herein.

[0025] The housing 10 has an opening OP. The opening OP is sized to accommodate the air exchange device 14. The normal of the opening OP is not parallel to the normal of the plane of the display panel 12. For example, the normal of the opening OP can be perpendicular to the normal of the plane of the display panel 12. For example, the air exchange device 14 can be embedded in the opening OP of the housing 10. For example, the air exchange device 14 can be sealed to the housing 10 via an adhesive for ventilating the electronic display assembly 1 by air flow in more than one direction. In some embodiments, the air exchange device 14 is disposed on the top of the electronic display assembly 1. In some other embodiments, the position of the air exchange device 14 disposed on the housing 10 can be determined based on actual needs, as long as the air exchange device 14 does not block the display panel 12.

[0026] In a preferred embodiment, the air exchange device 14 is a two-way breathable device, such as a two-way breathable valve. In another preferred embodiment, the air exchange device 14 is a filter or any ventilation material that can filter contaminants such as dust or dirt. In another preferred embodiment, the air exchange device 14 is a combination of one or more valves and filters. In some other embodiments, the air exchange device is a one-way air exchange device, such as a one-way breathable valve. In some other embodiments, the air exchange device is two or more breathable components with different air intake directions, such as two or more valves with different directions.

[0027] For example, the flow generator 16 is a fan disposed in the optical cavity / accommodation space S of the housing 10 and configured to generate an internal air flow across the path in the accommodation space S of the housing 10 so as to form an internal circulating air flow IF. As shown in FIG. 1, the path is composed of portions PI, P2, P3 and P4. The portion PI of the path is adjacent to one side of the air exchange device 14. The portion P2 of the path is between the transparent plate 15 and the display panel 12. The portion P3 of the path is adjacent to the back side of the backlight module 11. The portion P4 of the path is on the bottom of the electronic display assembly 1. Figure 1

[0028] In some embodiments, the flow generator 16 is triggered when the temperature inside the electronic display assembly 1 exceeds a threshold value. In some embodiments, the flow generator 16 is triggered when the pressure inside the electronic display assembly 1 exceeds a threshold value. In some other embodiments, the flow generator 16 will automatically run when the electronic display assembly 1 is turned on and automatically stop when the electronic display assembly 1 is turned off. It is worth noting that the number of flow generators 16 inside the accommodation space S is not limited to the embodiments of the present application.

[0029] ​When the flow generator 16 is in operation, a pressurized air flow is generated to form the internal circulation air flow IF. The flow generator 16 generates the air flow between the transparent plate 15 and the display panel 12 and passes the air flow through one side of the air exchange device 14. As shown in the embodiments Figure 1 As shown in the embodiments, the internal circulation air flow IF flows between the transparent plate 15 and the display panel 12 to transfer the heat caused by the sunlight passing through the transparent plate 15. The internal circulation air flow IF also passes through the back side of the backlight module 11 to transfer the heat generated by the backlight module. The heat accumulated in the housing 10 is released to the external environment through the air exchange device 14.

[0030] The internal circulation air flow IF flows through the portion P1 of the path and generates wind pressure to affect the air exchange device 14 (e.g., a bidirectional air-permeable valve including a screen filter). The wind pressure will cause the air exchange effect of the air exchange device 14. In detail, when the internal circulation air flow IF flows, ambient air enters the housing 10 of the electronic display assembly 1 through the air exchange device 14 due to the wind pressure caused by the internal circulation air flow IF, and the air inside the housing 10 of the electronic display assembly 1 exits the electronic display assembly 1 through the air exchange device 14 at the same time. The amount of air intake and the amount of air exhaust can be different. For example, if the temperature or pressure inside the housing 10 is higher than that of the external environment, the amount of air exhaust exceeds the amount of air intake. In some embodiments, the air exchange rate of the air exchange device is proportional to the speed of the internal air flow generated by the flow generator 16. In some embodiments, the air exchange rate of the air exchange device 14 is proportional to the opening size of the air exchange device 14. In some embodiments, the air exchange rate of the air exchange device 14 is proportional to the air permeability of the filter contained in the air exchange device 14.

[0031] Due to the air exchange through the air exchange device 14, the heat generated by the sunlight and / or the backlight module 11 (or other components) of the electronic display assembly 1 can be transferred to the external environment, thereby reducing the temperature of the electronic display assembly 1. Therefore, the use of the air exchange device 14 can effectively solve the problem of deformation of the optical components caused by high temperature inside the electronic display assembly 1 and solve the problem of optical defects caused by friction between the optical components (e.g., the display panel 12, the optical film 13, etc.) due to the deformation of the optical components. In addition, the moisture inside the accommodation space S of the housing 10 can also be discharged through the air exchange device 14. In some embodiments, when the electronic display assembly 1 is turned off, the flow generator 16 is automatically stopped. Since the wind pressure stops, the internal circulation air flow IF will also stop, which will make the air exchange effect stop synchronously. This prevents moisture from entering the accommodation space S of the housing 10 when the electronic display assembly 1 is turned off. Furthermore, due to the air exchange through the air exchange device 14, the pressure inside the accommodation space S of the housing 10 is balanced with the pressure of the external environment.

[0032] By using the air exchange device 14 comprising a valve, the housing 10 can be in an airtight state most of the time and prevent larger particles or contaminants from entering the housing 10. The valve opens when the air pressure inside or outside the housing 10 is different, and the force caused by the pressure difference is enough to open the valve. For example, as the temperature in the housing 10 increases, the pressure inside the housing 10 increases. The air pressure inside the housing 10 increases until the valve is opened by the air pressure. When the valve opens, the air inside the housing with a high temperature is discharged through the valve and ambient air with a lower temperature enters the housing 10. Therefore, the temperature inside the housing decreases rapidly.

[0033] By using the sieve filter of the air exchange device 14, when the ambient air enters the housing 10 of the electronic display assembly 1, dust or dirt will be filtered out by the sieve filter of the air exchange device 14; thus preventing any size of contaminants from entering the electronic display assembly 1. When the air inside the housing 10 leaves the electronic display assembly 1 through the air exchange device 14, the thrust of the exhaust gas will push the dust attached to the filter out, thus prolonging the service life of the sieve filter contained in the air exchange device 14.

[0034] In this embodiment, only one air exchange device is used. It is worth noting that the number and installation position of the air exchange devices can be determined based on actual needs and are not limited by the embodiments in the present application. Although the electronic display assembly of the embodiments of the present application is exemplified by a liquid crystal display, the air exchange device of the present application can also be applied to other types of display devices, such as OLED.

[0035] In Figure 1 , the electronic display assembly 1 further comprises a heat exchanger 20 disposed in the mounting opening of the rear portion of the housing 10. The external heat dissipation channel CH1 and the internal heat dissipation channel CH2 (i.e., the portion P3 of the path) and the heat-conductive portion 202 collectively form the heat exchanger 20. For example, the heat-conductive portion 202 is a metal plate made of aluminum. It is worth noting that any airflow in the internal heat dissipation channel CH2 is independent of the ambient airflow AF in the external heat dissipation channel CH1.

[0036] The internal portion of the heat exchanger 20 is disposed in the accommodation space S of the housing 10. The inner side surface of the heat exchanger 20 is attached to the back side of the backlight module 11, so that the backlight module 11 is in thermal contact with the heat exchanger 20. The internal heat dissipation channel CH2 of the heat exchanger 20 is in fluid connection with the path inside the housing 10, so that the airflow generated by the airflow generator 16 in the housing 10 can pass through the internal heat dissipation channel CH2 of the heat exchanger 20. The external portion of the heat exchanger 20 protrudes from the mounting opening in the rear portion of the housing 10, and the external heat dissipation channel CH1 is in fluid connection with the external environment.

[0037] The electronic display assembly 1 further includes another flow generator 17. For example, the flow generator 17 is a fan to facilitate the flow of ambient air AF through the external heat dissipation channel CH1 in order to conduct the heat conducted by the heat exchanger 20 to the external environment.

[0038] An ambient airflow AF (such as cold air) flows in the external heat dissipation channel CH1 of the heat exchanger 20. The high-temperature airflow in part P3 of the path raises the temperature of the internal portion of the heat exchanger 20, while the ambient airflow AF in the external heat dissipation channel CH1 lowers the temperature of the external portion of the heat exchanger 20. Therefore, due to the thermal contact between the internal and external portions of the heat exchanger 20 via the heat-conducting portion 202, the heat generated by the sunlight and / or the backlight module 11 of the electronic display assembly 1 is transferred to the external environment more rapidly through the heat exchanger 20, thereby reducing the internal temperature of the electronic display assembly 1.

[0039] Figure 2 This is a cross-sectional view of an electronic display assembly according to some embodiments of the present invention. According to some embodiments of the present invention, the electronic display assembly 2 includes a housing 10, a display panel 12, an air exchange device 14, and a flow generator 16. According to some embodiments of the present invention, the electronic display assembly 2 may further include at least one of a backlight module 11, an optical film 13, a transparent plate 15, a flow generator 17, and a heat exchanger 20. The transparent plate 15 may be disposed in a display opening in the front portion of the housing 10. For example, the display panel 12 may be a liquid crystal panel and disposed between the transparent plate 15 and the optical film 13. For example, the optical film 13 may be a light diffuser, a light reflector, a brightness enhancement film, or a combination of two or more of these.

[0040] Figure 2 The electronic display assembly 2 shown is Figure 1 One difference between the electronic display assemblies 1 shown lies in the composition of the paths within the housing 10. Specifically, the paths are composed of portions P1, P2, P3, P4, and P5. Path portion P1 is located adjacent to one side of the air exchange device 14. Path portion P2 is located between the transparent plate 15 and the display panel 12. Path portion P3 is located between the backlight module 11 and the heat-conducting portion 202 of the heat exchanger 20. Path portion P4 is located on the bottom of the electronic display assembly 2. Path portion P5 is located between the display panel 12 and the optical film 13.

[0041] The heat exchanger 20 and the air exchange device 14 according to this embodiment are advantageous for dissipating heat accumulated in the electronic display assembly 2 in order to reduce the temperature within the electronic display assembly 2. The heat accumulated in the electronic display assembly 2 is mainly heat generated by exposure to sunlight or by light sources in the backlight module 11 and / or other electronic components in the electronic display assembly 2. It is noted that because of the two air paths on the front side and the back side of the display panel 12, heat accumulated by sunlight on the transparent plate 15 and the display panel 12 can be quickly guided to the internal heat dissipation channel CH2 of the heat exchanger 20. Due to the thermal contact between the internal heat dissipation channel CH2 and the external heat dissipation channel CH1 of the heat exchanger 20 via the thermally conductive portion 202 and the air exchange effect of the air exchange device 14, the overall temperature inside the electronic display assembly 2 can be reduced more quickly.

[0042] With Figure 1 The components of the electronic display assembly 1 of Figure 2 The other components in the electronic display assembly 2 of

[0043] Figure 3 is a cross-sectional view of an electronic display assembly 3 according to some embodiments of the present application. According to some embodiments of the present application, the electronic display assembly 3 comprises a housing 10, a display panel 12, an air exchange device 14, and a flow generator 16. According to some embodiments of the present application, the electronic display assembly 3 can further comprise at least one of a backlight module 11, an optical film 13, a transparent plate 15, a flow generator 17, and a heat exchanger 20. The transparent plate 15 can be disposed in a display opening of a front portion of the housing 10. For example, the display panel 12 can be a liquid crystal panel disposed between the transparent plate 15 and the optical film 13. The optical film 13 can be disposed between the display panel 12 and the backlight module 11.

[0044] Figure 3 One difference between the electronic display assembly 3 shown in Figure 2 and the electronic display assembly 2 shown in

[0045] It is noted that compared to Figure 1the electronic display assembly 1 shown in FIG. 1 or Figure 2 the electronic display assembly 2 shown in FIG. 2, by Figure 3 The heat generated by the light source of the backlight module 11 of the electronic display assembly 3 shown in FIG. 3 can be dissipated more rapidly because there are two air paths (i.e., P2 and P5) on the front and back sides of the display panel 12 and two air paths (i.e., P6 and P3) on the front and back sides of the backlight module 11.

[0046] It should be noted that in embodiments of the present application, the gap between each of these portions P1, P2, P3, P4, P5 and P6 of the paths can be adjusted as appropriate based on actual needs so that the internal circulation airflow IF can flow through these portions P1, P2, P3, P4, P5 and P6 of the paths.

[0047] FIGS. 4(a), 4(b) and 4(c) are schematic diagrams illustrating the internal circulation airflow inside the optical cavity and the disturbed airflow around the opening of the air exchange device of an electronic display assembly according to some embodiments of the present application.

[0048] FIG. 4(a) is a schematic diagram illustrating a simplified simulation environment of an electronic display assembly (e.g., the electronic display assembly 1 shown in FIG. 1). FIG. 4(b) is a top view of the electronic display assembly. Component 401 acts as a flow generator (e.g., the flow generator 16 shown in FIG. 1). Component 402 acts as an air exchange device (e.g., the air exchange device 14 shown in FIG. 1). Component 403 is a measurement component for measuring the airflow rate, so this component will not be installed in the electronic display assembly in actual applications. Please note that in this simulation, the size of the opening of the air exchange device 402 is 200 x 90 mm. Figure 1 Figure 1 FIG. 4(b) is a top view of the electronic display assembly. Component 401 acts as a flow generator (e.g., the flow generator 16 shown in FIG. 1). Component 402 acts as an air exchange device (e.g., the air exchange device 14 shown in FIG. 1). Component 403 is a measurement component for measuring the airflow rate, so this component will not be installed in the electronic display assembly in actual applications. Please note that in this simulation, the size of the opening of the air exchange device 402 is 200 x 90 mm. Figure 1

[0049] FIG. 4(c) shows that when the flow generator 401 is operated, the internal circulation airflow IF is generated and also the disturbed airflow near the opening of the air exchange device. According to the enlarged schematic diagram of the airflow in the opening of the air exchange device in FIG. 4(c), it can be demonstrated that when the internal circulation airflow IF passes through the air exchange device, the ambient air enters the electronic display assembly through the first part of the air exchange device and the airflow simultaneously exits the electronic display assembly 1 through the second part of the air exchange device. Therefore, the pressure and humidity inside the electronic display assembly are balanced with the external environment through the air exchange device. Based on this simulation, it can be seen that although the direction of a portion of the internal circulation airflow IF near the air exchange device is not parallel to the normal of the opening of the air exchange device, there is still air exchange through the opening of the air exchange device.

[0050] ​​Figures 5(a), 5(b), and 5(c) are schematic diagrams illustrating the simulation results of the airflow rate of the air exchange device. Figure 5(a) is a schematic diagram illustrating the measurement direction. Figure 5(b) shows that part of the ambient air (Pa) enters the electronic display assembly via the air exchange device. Figure 5(c) shows that part of the internal circulating airflow (IF) leaves the electronic display assembly via the air exchange device (Pb). Figures 5(b) and 5(c) demonstrate that the electronic display assembly can simultaneously achieve both the intake and exhaust effects via the air exchange device when the flow generator is operating.

[0051] Figure 6 This is a cross-sectional view of a dual-sided liquid crystal display 600 according to some embodiments of the present invention. The dual-sided liquid crystal display 600 includes an electronic display assembly 6 and an electronic display assembly 6'. The only difference between the electronic display assembly 6 and the electronic display assembly 6' is that the display panels face opposite directions. In some embodiments, the electronic display assembly 6 and the electronic display assembly 6' can simultaneously display the same content. In some embodiments, the electronic display assembly 6 and the electronic display assembly 6' can display different image / video content. The structures of the electronic display assemblies 6 and 6' are similar to the structure of the electronic display assembly 1. Therefore, with Figure 1 The electronic display assembly 1 and its components have the same component symbols. Figure 6 The components in the electronic display assemblies 6 and 6' refer to the same or similar components, and therefore their detailed descriptions are not repeated here.

[0052] like Figure 6 As shown, the dual-sided liquid crystal display 600 further includes a dual-sided housing 610 that houses a portion of the electronic display assembly 6 and a portion of the electronic display assembly 6'. The dual-sided housing 610 may have one or more openings (e.g., openings OP1, OP2, OP3, and OP4) to allow ambient air AF to flow into the dual-sided liquid crystal display 600. The dual-sided liquid crystal display 600 further includes a flow generator 612, such as a fan, to facilitate airflow circulation within the dual-sided housing 610. Specifically, the ambient air AF may flow through an external heat dissipation channel CH1 of the heat exchanger 20 of the electronic display assemblies 6 and 6' to direct heat conducted by the heat exchanger 20 to the external environment.

[0053] In some embodiments, when the dual-sided liquid crystal display 600 is powered on, the flow generator 16 inside the housing 10 can automatically operate to create the internal circulation airflow IF inside the housing 10. The air pressure will cause the air exchange effect on the air exchange device 14. In detail, when the internal circulation airflow IF passes through the air exchange device 14, the air inside the housing 10 exits the electronic display assembly 6 and 6' via the air exchange device 14, and the ambient air enters the housing 10 of the electronic display assembly 6 and 6' via the air exchange device 14 at the same time. When the dual-sided liquid crystal display 600 is powered off, the flow generator 16 can automatically stop. As the air pressure stops, the internal circulation airflow IF will also stop, which will make the air exchange effect stop synchronously. This prevents moisture from entering the housing 10 when the dual-sided liquid crystal display 600 is powered off.

[0054] Due to the air exchange via the air exchange device 14, the heat or moisture accumulated inside the housing 10 can be discharged via the air exchange device 14 and the openings OP1, OP2, OP3, OP4 of the dual-sided housing 610, thereby reducing the temperature and humidity inside the electronic display assembly 6 and 6'. Also, due to the air exchange via the air exchange device 14, the pressure in the housing 10 of the electronic display assembly 6 and 6' can be balanced with the pressure of the external environment.

[0055] Due to the screen filter of the air exchange device 14, when the ambient air enters the housing 10 of the electronic display assembly 6 and 6' via the air exchange device 14, the dust or dirt will be filtered out by the screen filter of the air exchange device 14; thereby preventing any contaminants of any size from entering the electronic display assembly 6 and 6'. When the air inside the housing 10 exits the electronic display assembly 6 and 6' via the air exchange device 14, the thrust of the exhaust gas will push the dust attached to the filter out, thereby prolonging the service life of the screen filter of the air exchange device 14.

[0056] Therefore, the present application provides an electronic display assembly or a dual-sided display with a dynamically adjustable airtight state inside the optical cavity, which can effectively solve the deformation problem of the optical components in the electronic display assembly or the dual-sided display and maintain the balance of temperature, pressure and humidity to prolong the service life of the electronic display assembly or the dual-sided display.

[0057] As used herein, the singular terms "a," "an," and "the" can include plural referents unless the context clearly indicates otherwise. For example, reference to an electronic device can include more than one electronic device unless the context clearly indicates otherwise.

[0058] As used herein, the terms "connect," "connected," and "connection" refer to operational coupling or linking. Connected components can be coupled directly or indirectly, e.g., via another component.

[0059] In addition, quantities, ratios and other numerical values in this document are sometimes presented in a range format. It is to be understood that such range format is used for convenience and brevity and should be construed as having been followed had each distinct value contended in the range been enumerated individually.

[0060] While the application has been described and illustrated with reference to specific embodiments thereof, those skilled in the art will understand that various changes can be made and equivalents substituted for elements thereof without departing from the true spirit and scope of the application as defined by the appended claims. The specification is to be regarded as illustrative rather than restrictive. Modifications can be made to adapt a particular situation, material, composition of matter, process or method to the objective, spirit and scope of the application. All such modifications are intended to be within the scope of the claims and equivalents thereof. While the methods disclosed herein have been described with reference to particular operations performed in a particular order, it will be understood that these operations can be combined, sub-divided, or re-ordered to form equivalent methods without departing from the teachings of the present application. Accordingly, unless specifically indicated herein, the order and grouping of operations is not a limitation of the application.

Claims

1. An electronic display assembly comprising: a housing (10) having an opening (OP); a display panel (12); a backlight module (11); an optical film (13) disposed between the display panel (12) and the backlight module (11); an air exchange device (14) configured in the opening of the housing; and a first flow generator (16) generating an internal circulation air flow through a path within the housing, the internal circulation air flow flowing between the display panel (12) and the optical film (13), a side of the backlight module, and in the vicinity of the air exchange device; wherein a direction of the internal circulation air flow flowing adjacent to the air exchange device over a first portion (PI) of the path is not parallel to a normal of the opening.

2. The electronic display assembly of claim 1, wherein the air exchange device comprises a screen filter, a one-way air permeable valve, a two-way air permeable valve, or two valves having different directions.

3. The electronic display assembly of claim 1, wherein when the first flow generator is operated, ambient air enters the housing of the electronic display assembly via the air exchange device and air inside the housing exits the electronic display assembly via the air exchange device.

4. The electronic display assembly of claim 1, wherein the first flow generator is triggered when a temperature inside the electronic display assembly exceeds a threshold value.

5. The electronic display assembly of claim 1, wherein a ventilation rate of the air exchange device is proportional to a speed of the internal air flow generated by the first flow generator.

6. The electronic display assembly of claim 1, wherein a ventilation rate of the air exchange device is proportional to a size of an opening of the air exchange device.

7. The electronic display assembly of claim 1, further comprising a transparent plate (15), and wherein a second portion (P2) of the path is between the transparent plate (15) and the display panel (12), and a third portion (P3) of the path is adjacent to the backlight module (11) opposite the display panel.

8. The electronic display assembly of claim 7, wherein a fourth portion (P4) of the path has a direction parallel to a direction of the first portion (PI) of the path, and a fifth portion (P5) of the path is between the backlight module (11) and the display panel (12).

9. The electronic display assembly of claim 8, wherein the fifth portion (P5) of the path is configured between the display panel (12) and the optical film (13).

10. The electronic display assembly of claim 9, wherein a sixth portion (P6) of the path is configured between the optical film (13) and the backlight module (11).

11. The electronic display assembly of claim 1, further comprising: a heat exchanger (20) attached to the backlight module (11) and having a first channel (CH1), wherein ambient air flows through the first channel. ​ 12. The electronic display assembly of claim 11, wherein the heat exchanger further comprises a second channel (CH2) adjacent to the backlight module (11).

13. The electronic display assembly of claim 11, further comprising a second flow generator (17) generating an ambient airflow through the first channel (CH1).

14. The electronic display assembly of claim 1, wherein the normal of the opening is not parallel to the normal of the display panel.

15. An electronic display assembly comprising: a housing; a transparent plate; a display module comprising a display panel, a backlight module, and an optical film disposed between the display panel and the backlight module; an air exchange device sealed within the housing for ventilating the electronic display assembly by airflow in more than one direction; an external flow generator introducing an ambient airflow in an external heat dissipation channel; and an internal flow generator disposed within the housing, wherein the internal flow generator generates an internal circulating airflow between the transparent plate and the display module and flows the internal circulating airflow through between the display panel (12) and the optical film (13), through one side of the backlight module, and in the vicinity of the air exchange device.

16. The electronic display assembly of claim 15, wherein the air exchange device comprises a screen filter, a one-way air permeable valve, a two-way air permeable valve, or two valves with different directions.

17. The electronic display assembly of claim 15, wherein when the flow generators are operated, ambient air enters the housing of the electronic display assembly via the air exchange device and air inside the housing exits the electronic display assembly via the air exchange device.

18. A double-sided display comprising: a first electronic display assembly as in any of claims 1-17; a second electronic display assembly as in any of claims 1-17; and a double-sided housing having openings for accommodating a portion of the first electronic display assembly and a portion of the second electronic display assembly. ​

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