Systems and methods for providing a portable display

Abstract

A portable display screen for automatically presenting information visually to third parties is disclosed. The portable display screen includes a microprocessor, image capturing devices, light and temperature sensors and communication modules. The temperature sensors monitor the temperature of the screen and the battery to adjust the screen brightness. The light sensors adjust the screen brightness in accordance with the surrounding lights. A cooling mechanism comprising Cooling Aluminum Heatsink (CAH) and retrofittable side cooling fans is provided that allows the microprocessor to be cooled without vents for outdoor use.

Description

[0001] SYSTEMS AND METHODS FOR PROVIDING A PORTABLE DISPLAY

[0002] CROSS-REFERENCE TO RELATED APPLICATIONS

[0003] This application claims the benefit of priority from U.S. Provisional Patent Application No. 63 / 688,395, filed August 29, 2024 the contents of which are incorporated by reference in their entirety.

[0004] FIELD OF THE DISCLOSURE

[0005] The disclosure herein relates to systems and methods for providing portable displays. In particular, but not exclusively, the disclosure relates to portable screens for displaying advertisements in all lighting and weather conditions.

[0006] BACKGROUND

[0007] It is often useful to display information to subjects within one’s surroundings. As visual displays are particularly good at displaying such information, visual displays may be carried by individuals as they move from location to location. The information may also be displayed to the individuals through roadside display boards, known as signages may be designed to persuade receivers of the merits of a given product or service.

[0008] The information being displayed by such devices may be used to indicate, for example, safety information to other pedestrians of road users, such as alerting them that the wearer is slowing down, speeding up, turning right, turning left or the like. Further, these devices may display location-based advertisements for the offers being offered at the nearby markets, theaters, malls, etc. These devices present current offers of one or more of nearby vendors to the local people in the market areas or roads.

[0009] However, these display screens are subject to varying lightning and weather conditions as being used in outdoor areas. These displays may produce glare in low light environments such as during night-time or cloudy days. Also, these displays do not have the capability to adjust the lightning in accordance with the surrounding light. Moreover, in high temperature regions, the temperature of the display screens might become very high which might rapidly drop its luminous rate, resulting in light attenuation. Consequently, the brightness of the display screen decreases over time. There is a need therefore to provide a display screen capable of outdoor use in all lighting and weather conditions. The invention described herein addresses the above-described needs.

[0010] SUMMARY OF THE EMBODIMENTS

[0011] The present disclosure addresses the challenges of using portable displays in varying outdoor lighting and weather conditions, particularly with respect to thermal management, power consumption, and content visibility. There is a need for a portable display system capable of sustained outdoor operation by intelligently managing its internal temperature and power usage while remaining visible and functional.

[0012] According to one aspect of the present disclosure, a portable display system is provided. The system comprises a housing, a display panel enclosed within the housing, a processing unit also enclosed within the housing and communicatively coupled to the display panel, a power source configured to power the system, at least one temperature sensor configured to measure a temperature of the system, and a cooling mechanism. The processing unit is configured to receive a temperature monitoring signal from the at least one temperature sensor, to determine if the measured temperature exceeds a threshold and, in response to the temperature monitoring signal indicating that the measured temperature exceeds the threshold, automatically to reduce a brightness of the display panel.

[0013] In some embodiments, the system further comprises at least one light sensor configured to measure an ambient light level. The processing unit is further configured to adjust the brightness of the display panel based on a light monitoring signal from the at least one light sensor, thereby optimizing visibility and conserving power. The system may also employ local dimming technology, wherein a backlight module for the display panel is a mini-LED backlight configured to perform local dimming to enhance contrast and further reduce power consumption. The cooling mechanism of the system may comprise a heatsink, such as a Cooling Aluminum Heatsink (CAH), thermally coupled to at least one of the processing unit and the display panel. The cooling mechanism may further comprise at least one fan arranged to cool the heatsink. In an exemplary embodiment, the at least one fan is retrofittable and is automatically activated by the processing unit in response to the temperature monitoring signal indicating an over-threshold condition. To ensure durability in outdoor environments, the housing may be substantially ventless and sealed to achieve an IP67 rating.

[0014] The at least one temperature sensor may comprise a screen temperature sensor configured to monitor an open cell temperature of the display panel. The at least one temperature sensor may also comprise a battery temperature sensor configured to monitor a temperature of the power source. The power source is preferably a battery, which in some embodiments comprises lithium iron phosphate cells for enhanced safety and longevity.

[0015] The system may further comprise an image capturing device communicatively coupled to the processing unit. The processing unit can be configured to analyze images from the image capturing device to determine an absence of a viewer in a field of view and, in response, automatically reduce the brightness of the display panel to conserve power.

[0016] To facilitate high-quality video display, the system may include an HDMI to Low-Voltage Differential Signaling (LVDS) converter configured to interface the processing unit with the display panel.

[0017] For connectivity, the system may further comprise a communication module, such as a 4G LTE module, communicatively coupled to the processing unit. This module is configured for wireless communication with a remote server, enabling the system to receive updated content or instructions. The system may also comprise a location sensor communicatively coupled to the processing unit to enable location-based services.

[0018] Additionally, the system may include at least one gravity sensor, such as a gyroscope or accelerometer, communicatively coupled to the processing unit. The processing unit is configured to adjust an orientation of content on the display panel based on a signal from the at least one gravity sensor. The housing is adaptable, being configured for mounting on a wearable item, such as a delivery bag, or on a vehicle.

[0019] According to another aspect of the present disclosure, a method for managing a portable display system is provided. The method comprises: displaying content on a display panel of the portable display system; monitoring a temperature of at least one component of the portable display system using at least one temperature sensor; determining if the monitored temperature exceeds a predefined threshold; and in response to determining that the temperature exceeds the predefined threshold, automatically reducing a brightness of the display panel.

[0020] The method may further comprise monitoring an open cell temperature of the display panel or monitoring a temperature of a power source of the system. In response to the temperature exceeding the threshold, the method may further comprise activating at least one fan to direct airflow across a heatsink.

[0021] The method may also include the steps of: measuring an ambient light level using a light sensor; and dynamically adjusting the brightness of the display panel based on the measured ambient light level. Further, the method may comprise: capturing images of a field of view of the portable display system with an image capturing device; analyzing the captured images to determine an absence of a viewer; and in response, automatically reducing the brightness of the display panel to conserve power.

[0022] The method can further involve: detecting an orientation of the portable display system using at least one gravity sensor and adjusting the content orientation accordingly; determining a location of the system using a location sensor and selecting content based on the location; and communicating with a remote server to receive and display updated content. The step of displaying content may further comprise performing local dimming by selectively adjusting the brightness of zones of a mini-LED backlight.

[0023] BRIEF DESCRIPTION OF THE FIGURES

[0024] For a better understanding of the embodiments and to show how it may be carried into effect, reference will now be made, purely by way of example, to the accompanying drawings.

[0025] With specific reference now to the drawings in detail, it is stressed that the particulars shown are by way of example and for purposes of illustrative discussion of selected embodiments only, and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects. In this regard, no attempt is made to show structural details in more detail than is necessary for a fundamental understanding; the description taken with the drawings making apparent to those skilled in the art how the various selected embodiments may be put into practice. In the accompanying drawings:

[0026] Fig. 1 illustrates a display system including a wearable display device worn by a rider of an open vehicle according to aspects of the current disclosure;

[0027] Fig. 2A illustrates the exemplary components of the display screen according to an aspect of the current disclosure;

[0028] Fig. 2B illustrates the lightning control mechanism of the display screen according to an aspect of the current disclosure;

[0029] Figs. 3A and 3B illustrate the cooling mechanism of the display screen according to aspects of the current disclosure; and

[0030] Figs. 4A and 4B illustrate exemplary attachment of the display screen on the back of a bag pack and a vehicle, respectively; and.

[0031] Fig. 5 is a flowchart illustrating a method for managing a portable display system according to an embodiment of the present disclosure.

[0032] DETAILED DESCRIPTION

[0033] Aspects of the present disclosure relate to system and methods for providing portable displays for providing location based visual presentation. For example a display may be used to present a location sensitive notification such as a hazard warning, an advertisement, a signaling system operable to provide automatic signaling for a user of an open vehicle, local information and the like.

[0034] The portable display screen may include a processing unit, image capturing devices, light and temperature sensors, battery, communication modules, etc. The temperature sensors monitor the screen and battery temperatures to adjust the screen brightness. The light sensors also adjust the screen brightness in accordance with the surrounding lights. The local dimming technology allows the darkening of specific areas of the screen to create contrast and more natural images. The display screen may also comprise an HDMI to Low-Voltage Differential Signaling (LVDS) converter. This provides higher contrast ratio and less average power consumption by the display screen.

[0035] A cooling mechanism is also provided that allows the processor to be cooled without vents for outdoor use. The screen housing comprises Cooling Aluminum Heatsink (CAH) to effectively dissipate heat from the processing unit. In addition, retrofittable side cooling fans are mounted aside to the CAH to provide lateral cooling to the heatsink to dissipate the processing unit heat.

[0036] In various embodiments of the disclosure, one or more tasks as described herein may be performed by a data processor, such as a computing platform or distributed computing system for executing a plurality of instructions. Optionally, the data processor includes or accesses a volatile memory for storing instructions, data or the like. Additionally, or alternatively, the data processor may access a non-volatile storage, for example, a magnetic hard-disk, flash-drive, removable media or the like, for storing instructions and / or data.

[0037] It is particularly noted that the systems and methods of the disclosure herein may not be limited in its application to the details of construction and the arrangement of the components or methods set forth in the description or illustrated in the drawings and examples. The systems and methods of the disclosure may be capable of other embodiments, or of being practiced and carried out in various ways and technologies.

[0038] Alternative methods and materials similar or equivalent to those described herein may be used in the practice or testing of embodiments of the disclosure. Nevertheless, particular methods and materials are described herein for illustrative purposes only. The materials, methods, and examples are not intended to be necessarily limiting.

[0039] Reference is now made to Fig. 1 , there is provided a personal display system, which is generally indicated at 100, including a wearable display worn by a rider of an open vehicle. The personal display system 100 comprises a wearable item 106 worn by a user 102 riding an open vehicle 104, the wearable item 106 comprising a rear-facing display screen 108 visible for an observer 116 behind the user 102 when wearing the wearable item 106. Optionally, the display module comprises a front-facing display facing ahead towards the direction of motion and visible to observers ahead of the user 102.

[0040] The user 102 may be a service delivery person, for example, a food delivery person. In such a case, the wearable item 106 is the delivery bag containing the food items to be delivered to the customers. The display screen 108 may be attached to the delivery bag 106 through connectors provided on the screen 108. Alternatively, the delivery bag 106 may contain a transparent pocket to accommodate the display screen 108 such that the advertisement being played on the screen 108 is visible to the observers 116 behind the user 102. The attachment of the display screen at the back of the delivery bag is shown in Fig. 4A.

[0041] The display screen 108 is configured to display messages, advertisements announcements, etc. based on the data received from a remote server 112 which is connected to the display screen 108 through a network 110. In addition to displaying advertisements, the screen 108 is also configured to capture images and activities of the observers 116 through its image capturing devices and sensor units. The screen 108 is also configured to determine its location and continuously update it if mounted on a moving vehicle as illustrated in Fig. 4B. The captured observers’ data and the location data is transmitted to the remote server 112 for further processing. The remote server 112 processes the received data to extract valuable information including the profile of observers 116, the number of observers who actually viewed the advertisement being played on the display screen 108, the type of location areas where the display screen was taken on the moving vehicle, the change of viewing pattern in these location areas, the product / service purchase pattern in these areas, etc. The remote server 112 stores all the received and processed information in its memory 114. The remote server 112 is also configured to provide feedback to the display screen 108 to continue with the current advertisement being played or update to a new ad based on the processed data.

[0042] In an alternative embodiment, the processing of the captured observers’ data and the location data is done at the display screen 108 and the processed data is then sent to the remote server 112. The server 112 determines the advertisement to be played on the screen 108 based on the received data and provides the feedback accordingly.

[0043] In alternative embodiments of the current disclosure, the display screen can also be a stationary billboard placed in a marketplace, shopping mall a roadside signage board, a fixed or portable advertisement board placed in a corporate or business unit, hospitals, cinema hall, stadium, sports complex, parking area, educational institute, or any public place.

[0044] In preferred embodiment of the present invention, the display screen may have the following physical configuration: • Screen Size: 18.5” inch

[0045] • Screen Type: LCD.

[0046] • Brightness: 2000 nits.

[0047] • Screen Cover: 2mm glass with non-glare coating

[0048] The abovementioned exemplary configuration of the display screen makes it suitable to be mounted on a service delivery bag of a delivery person. In other examples, the display screen my have different dimensions and specifications to suit requirements for example billboards typically would require larger screen sizes of say 27 inch by 40 inch, but could be much larger than that say 14 foot by 48 foot for 672 square feet of advertising space, such screens may well have a brightness of 5000 nits or more to suit requirements.

[0049] The various components of the display screen 200 are shown in Fig. 2A. The display screen 200 comprises a processing unit 202 which controls all the other components of the display screen 200 and also processes the captured viewers’ data and the location data. In an exemplary embodiment, the processing unit 202 can be a Raspberry Pi 5 single board computer which is a controlling host for all the connected peripheral devices. Alternatively, the processing unit 202 can be an embedded system executing software or firmware.

[0050] The display screen 200 may comprise one or more cameras to capture the images of nearby areas and individuals around the display screen. The camera can be 200 degrees RGB Cameras 206 used to deliver colored images of people and objects by capturing light in red, green, and blue wavelengths (RGB). The RGB camera 206 is equipped with a standard CMOS sensor through which the colored images of persons and objects are acquired. The cameras can also be Infrared cameras 204 used to capture images during night time or places where intensity of light is low. The display screen 200 may comprise one or more of any of the cameras for capturing the images. The display screen 200 may also comprise a light sensor 208 used to measure the intensity of light in the vicinity of the display screen 200. The processing unit 202 will activate the cameras based on the intensity of light measured by the light sensor 208. For example, in case of darkness the light sensor 208 will provide the information to the processing unit 202 which will activate the Infrared cameras 204 for capturing the vicinity images. The light sensor 208 may also comprise day and night modes which can be manually selected or adjusted automatically. The light sensor 208 is also configured to provide inputs to a lightning control mechanism of the display screen 200 to control the screen brightness. The details of lightning control mechanism are discussed below.

[0051] The display screen 200 also comprises one or more gravity sensors 210 such as a Gyroscope, an Accelerometer, etc. The gravity sensors 210 are configured to detect the orientation of the display screen 200 and rotate the display accordingly. The gravity sensors 210 makes the screen 200 compatible to be used in any orientation. Further, in case the display screen 200 is mounted on a moving vehicle, the accelerometer can measure the forces of acceleration, or 'G-forces', that act upon the vehicle. These forces could be due to sudden changes in direction, braking, or impact, such as during a collision. The cameras 204, 206 are then automatically activated to detect these incidents. A location sensor 212 is provided to capture the location of the display screen 200 on which advertisement is being presented. The location sensor 212 may be based on any Global navigation satellite system (GNSS) such as Global Positioning System (GPS), Global Navigation Satellite System (GLONASS), BeiDou Navigation Satellite System (BDS), Galileo, Indian Regional Navigation Satellite System (IRNSS), Quasi-Zenith Satellite System (QZSS) to capture the location information. Alternatively, the location sensor may be a position sensor that detects a person or object’s position. Any known location sensor may be used without limiting the scope of the invention. The display screen 200 may also comprise a microphone and a speaker 216 to enable a person carrying the display screen 200 on a portable or stationary platform to exchange instructions and information with a central office or a third party. A screen temperature sensor 214 is also provided to measure the temperature of the display screen 200 and take appropriate actions. High power consumption under direct outdoor sunlight may cause overheating and black screen. The screen temperature sensor 214 monitors the open cell temperature. If the open cell temperature is above a predefined threshold, the intensity of the display screen 200 is reduced until the temperature decreases to a safe limit. In an exemplary embodiment, if the open cell temperature is above 80 degrees Celsius, the screen is dimmed until the temp is below 70 degrees Celsius.

[0052] The display screen 200 may also comprise optional solar panels 220 to provide power to the display screen 200 for operating the various components and charge the battery 230. The battery 230 is connected to a charging and temperature sensor 228 which monitors the battery 230 status. The sensor 228 also monitors the battery 230 condition like its health, current leakage, rusting and its operating temperature. In case of any detected deviation from the standard parameters, a notification is provided to either to the person carrying the display screen 200 or to a third party responsible for maintaining the display screen 200. In an exemplary embodiment, the display screen 200 should maintain a battery life of about 6-8 hours in a single charge. However, an always ON display reduces the battery life and leads to wastage of resources. The screen cameras 204, 206 may monitor the people in the field of view (FOV). In case there are no people in the camera FOV, the brightness of the display screen 200 is dimmed to save battery power. This may happen during late nights or in case of natural calamities in the vicinity of the display screen 200. The light sensor 208 may also dynamically adjust the screen brightness based on the surrounding lights to optimize battery life. The charging and temperature sensor 228 may also monitor the battery 230 temperature. If battery working temperature is approaching a predefined threshold, the brightness of the display screen 200 is dimmed until the battery 230 temperature is within the safe limits.

[0053] The display screen 200 may also comprise a physical sim or USB port 232 which may be connected to update the processing unit 202 software. The display screen 200 may also comprise a communication module 226 for communicating with the remote server 112 as illustrated in Fig. 1. In an exemplary embodiment, the communication module 226 may comprise a Bluetooth connection for connecting with the remote server 112. The communication module 226 may also comprise a network interface encompassing wire and / or wireless communication networks such as local-area networks (LAN) and wide-area networks (WAN). LAN technologies include Fiber Distributed Data Interface (FDDI), Copper Distributed Data Interface (CDDI), Ethernet, Token Ring and the like. WAN technologies include, but are not limited to, point-to-point links, circuit switching networks like Integrated Services Digital Networks (ISDN) and variations thereon, packet switching networks, and Digital Subscriber Lines (DSL). The communication module 226 may also comprise interface for connecting with a cloud network. The display screen 200 may also comprise a memory 224 to store the images captured by the cameras 204, 206 and the data processed by the processing unit 202.

[0054] The above-mentioned components of the display screen 200 are exemplary in nature and should not limit the scope of the invention. The display screen 200 may contain one or more of the components as required for the invention. Further, the display screen 200 may also contain additional components not disclosed herein.

[0055] Referring now to Fig. 2B which illustrates a lightning control mechanism of the display screen 200 according to an aspect of the present invention. The display screen 200 comprises a backlight control 234 to adjust the overall output of the LED array that makes up the set’s backlight. The backlight control 234 changes the display backlight in accordance with the surrounding light as measured by the light sensor 208 to increase the visibility in low light conditions. The backlight control may be achieved using mini-LED backlight 236 that uses a smaller LED chip to produce the same brightness as a larger chip. The miniaturized design allows for finer control of lighting levels, which makes it ideal for use in display screens. The mini-LED backlight 236 may provide brighter illumination with less power consumption, reducing the manufacturing costs. The miniLED backlight 236 may also encompass local dimming technology that allows the darkening of specific areas of the screen to create contrast and more natural images. Local dimming in these displays works by dimming or turning off the backlight in specific zones of the screen to improve contrast and black levels. This provides higher contrast ratio and less average power consumption by the display screen 200.

[0056] The display screen 200 may also comprise an HDMI to Low-Voltage Differential Signaling (LVDS) converter. The LVDS technology delivers high data rates while consuming less power than any other interfacing technologies. The LVDS cables are used for transporting video data from graphics adapters (not shown) to the display screen 200 at higher data rates. The LVDS provides benefits of making the system compatible to low-voltage power supply, low noise generation, higher data transmission rates and low power consumption.

[0057] The display screen 200 may be subject to direct sunlight increasing the temperature of the screen above the safe levels reducing the screen life. A cooling mechanism is provided that allows the processor to be cooled without vents for outdoor use as illustrated in Figs. 3A and 3B. Fig. 3A illustrates a backside view 300 of the display screen comprising a housing 302 made of any suitable material which can withstand the varying weather conditions. In an exemplary embodiment, the housing or shell of the display screen is made of plastic or aluminum. Alternatively, the screen housing comprises plastic body with Cooling Aluminum Heatsink (CAH) 306 at the back of it. CAH is designed to effectively dissipate heat from the screen processing unit 202. In addition to the CAH, side cooling fans 304 are mounted aside to the CAH 306. The cooling fans 304 are retrofittable and can be mounted and detached from the housing 302. The fans 304 provide lateral cooling to the heatsink to dissipate the processing unit heat. The fans 304 are secured to the housing 302 through a fan cover 310 which is mechanically fitted to the housing through screws. The fans can be removed from the housing for service or maintenance purposes.

[0058] The fans 304 are connected to the screen power supply through electrical connectors 308. These connectors internally connect to the power supply (e.g. battery 230) to operate the fans 304. The fans 304 are automatically activated when the screen temperature increases above the predefined level which is determined by the screen temperature sensor 214. The fans stop automatically when the screen temperature is within the safe limits. Fig. 3A shows two fans 304 mounted in the screen housing 302. Any number of fans may be mounted without limiting the scope of the invention. Moreover, any number of mounted fans may be operated at a particular time to optimize the power consumption.

[0059] Figs. 4A and 4B illustrate exemplary applications and mounting environments for the portable display system according to aspects of the present disclosure. These figures demonstrate the versatility of the system for use in mobile advertising and information display.

[0060] Fig. 4A illustrates an exemplary attachment of the portable display system 400 on a wearable item, specifically a delivery bag 402. In this embodiment, the user may be a service delivery person, and the wearable item 402 is a bag used for transporting goods, such as food. The portable display system 400 is shown mounted on the rear-facing side of the delivery bag 402, making it visible to observers located behind the user. The system 400 may be secured to the bag 402 through integrated connectors or, alternatively, may be placed within a transparent pocket designed to accommodate the display system. This configuration allows for the display of targeted advertisements, safety signals, or other information to pedestrians and other road users.

[0061] Fig. 4B illustrates another exemplary attachment of the portable display system 400' on a vehicle 402'. The prime notation (') indicates components that are similar in function to their unprimed counterparts but are shown in a different embodiment. Here, the portable display system 400' is mounted on the side of a vehicle 402', such as a delivery van or truck. This application allows for a larger-scale mobile billboard, displaying advertisements or other information to a wide audience as the vehicle travels its route or is parked in various locations. The system's robust, weather-resistant design and thermal management capabilities make it well- suited for such external vehicle mounting.

[0062] It is to be understood that the applications shown in Figs. 4A and 4B are exemplary and not limiting. The portable display system can be mounted on various other mobile or stationary platforms as required by a particular application, benefiting from its self-contained power and environmental management features.

[0063] Fig. 5 is a flowchart illustrating a method 500 for managing a portable display system according to an embodiment of the present disclosure. The method outlines a series of steps performed by the processing unit (202) to dynamically manage the system's display content, power consumption, and thermal state, ensuring optimal performance and longevity in varying outdoor conditions.

[0064] The method begins at START and proceeds to a block of Gather Parallel Inputs, which includes several data-gathering steps that may occur concurrently or sequentially to inform the system's operation.

[0065] At step 504, Measure Ambient Light, the system utilizes at least one light sensor (208) to measure the intensity of the surrounding light. This information is critical for optimizing the display's visibility and power usage. For example, in bright, direct sunlight, the processing unit (202) may increase the brightness of the display panel (108) towards its maximum output (e.g., 2000 nits) to ensure the content remains legible. Conversely, during nighttime or on an overcast day, the processing unit can reduce the brightness to prevent glare and conserve the battery (230), as described on page 9 of the specification.

[0066] At step 506, Detect Viewer Presence, the system employs an image capturing device, such as an RGB camera (206) or an infrared camera (204), to monitor the field of view (FOV) in front of the display. The processing unit (202) analyzes the captured images to determine if any viewers are present. As detailed on page 9, if no people are detected in the camera's FOV, for instance, when the user is in a deserted area, the processing unit can automatically dim the display screen to save battery power. The brightness is restored when a viewer re-enters the FOV.

[0067] At step 508, Gather Contextual Data, the system collects additional information from various sensors to tailor the displayed content. This includes:

[0068] Location Data: A location sensor (212), such as a GPS module, determines the real-time geographic position of the system. This allows for the display of location-based advertisements or information, as supported by the disclosure on page 6. For example, if the system detects it is near a specific store, it may display a promotion for that store.

[0069] Orientation Data: A gravity sensor (210), such as a gyroscope or accelerometer, detects the physical orientation of the display system. As mentioned on page 8, this allows the processing unit to automatically rotate the displayed content to match the screen's orientation, whether it is being held in a landscape or portrait mode.

[0070] Remote Data: A communication module (226) establishes a connection with a remote server (112) to receive updated content, such as new advertisements, announcements, or software updates, as described on page 6.

[0071] At step 510, Process Inputs & Display Content, the processing unit (202) synthesizes all the data gathered in the preceding steps (504, 506, 508). It makes a holistic decision on what content to display and at what initial brightness level, and then renders this content on the display panel (108).

[0072] The method then enters a continuous thermal management loop, starting at step 512, Monitor Temperature. The processing unit (202) continuously receives temperature data from at least one temperature sensor. This can include a screen temperature sensor (214) monitoring the open cell temperature of the display panel and / or a charging and temperature sensor (228) monitoring the temperature of the battery (230), as detailed on pages 8 and 9. At decision block 514, Temperature > Threshold?, the monitored temperature is compared against a predefined safety threshold. For example, as provided on page 8, the threshold for the open cell temperature may be set to 80°C. If the measured temperature does not exceed this threshold (the "No" path), the system is operating within safe limits, and the method loops back to step 512 to continue monitoring.

[0073] If the measured temperature exceeds the threshold (the "Yes" path), the method proceeds to Activate Corrective Actions. This involves one or both of the following steps:

[0074] At step 518, Automatically Reduce Brightness, the processing unit (202) automatically dims the display panel (108). Reducing the brightness of the mini-LED backlight (236) is an effective way to lower power consumption and, consequently, the heat generated by the display panel, as supported by the disclosures on pages 8 and 9.

[0075] At step 520, Activate Cooling Fan, the processing unit (202) sends a signal to activate the side cooling fans (304). As described on page 11 , these fans provide active cooling by directing airflow across the heatsink (306), thereby dissipating heat from the processing unit and other internal components.

[0076] After activating corrective actions, the method loops back to step 512, Monitor Temperature. This creates a closed-loop control system that continuously works to bring the system's temperature back down below the threshold and maintain it within a safe operating range. This entire process ensures the portable display system can operate reliably for extended periods in challenging outdoor environments.

[0077] Technical and scientific terms used herein should have the same meaning as commonly understood by one of ordinary skill in the art to which the disclosure pertains. Nevertheless, it is expected that during the life of a patent maturing from this application many relevant systems and methods will be developed. Accordingly, the scope of the terms such as computing unit, network, display, memory, server and the like are intended to include all such new technologies a priori.

[0078] As used herein the term “about” refers to at least ± 10 %.

[0079] The terms "comprises", "comprising", "includes", "including", “having” and their conjugates mean "including but not limited to" and indicate that the components listed are included, but not generally to the exclusion of other components. Such terms encompass the terms "consisting of' and "consisting essentially of".

[0080] The phrase "consisting essentially of' means that the composition or method may include additional ingredients and / or steps, but only if the additional ingredients and / or steps do not materially alter the basic and novel characteristics of the claimed composition or method.

[0081] As used herein, the singular form "a", "an" and "the" may include plural references unless the context clearly dictates otherwise. For example, the term "a compound" or "at least one compound" may include a plurality of compounds, including mixtures thereof.

[0082] The word “exemplary” is used herein to mean “serving as an example, instance or illustration”. Any embodiment described as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments or to exclude the incorporation of features from other embodiments.

[0083] The word “optionally” is used herein to mean “is provided in some embodiments and not provided in other embodiments”. Any particular embodiment of the disclosure may include a plurality of “optional” features unless such features conflict.

[0084] Whenever a numerical range is indicated herein, it is meant to include any cited numeral (fractional or integral) within the indicated range. The phrases “ranging / ranges between” a first indicate number and a second indicate number and “ranging / ranges from” a first indicate number “to” a second indicate number are used herein interchangeably and are meant to include the first and second indicated numbers and all the fractional and integral numerals therebetween. It should be understood, therefore, that the description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the disclosure. Accordingly, the description of a range should be considered to have specifically disclosed all the possible sub-ranges as well as individual numerical values within that range. For example, description of a range such as from 1 to 6 should be considered to have specifically disclosed sub-ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6 etc., as well as individual numbers within that range, for example, 1 , 2, 3, 4, 5, and 6 as well as non-integral intermediate values. This applies regardless of the breadth of the range.

[0085] It is appreciated that certain features of the disclosure, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the disclosure, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable sub-combination or as suitable in any other described embodiment of the disclosure. Certain features described in the context of various embodiments are not to be considered essential features of those embodiments unless the embodiment is inoperative without those elements.

[0086] Although the disclosure has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, it is intended to embrace all such alternatives, modifications and variations that fall within the spirit and broad scope of the appended claims.

[0087] All publications, patents and patent applications mentioned in this specification are herein incorporated in their entirety by reference into the specification, to the same extent as if each individual publication, patent or patent application was specifically and individually indicated to be incorporated herein by reference. In addition, citation or identification of any reference in this application shall not be construed as an admission that such reference is available as prior art to the present disclosure. To the extent that section headings are used, they should not be construed as necessarily limiting.

[0088] The scope of the disclosed subject matter is defined by the appended claims and includes both combinations and sub combinations of the various features described hereinabove as well as variations and modifications thereof, which would occur to persons skilled in the art upon reading the foregoing description.

Claims

CLAIMS1 . A portable display system, comprising: a housing; a display panel enclosed within the housing; a processing unit enclosed within the housing and communicatively coupled to the display panel; a power source configured to power the system; at least one temperature sensor configured to measure a temperature of the system; and a cooling mechanism; wherein the processing unit is configured to receive a temperature monitoring signal from the at least one temperature sensor, to determine if the measured temperature exceeds a threshold and, in response to the temperature monitoring signal indicating that the measured temperature exceeds the threshold, automatically to reduce a brightness of the display panel.

2. The system of claim 1 , further comprising at least one light sensor configured to measure an ambient light level, and wherein: the processing unit is further configured to adjust the brightness of the display panel based on a light monitoring signal from the at least one light sensor.

3. The system of claim 1 , wherein the cooling mechanism comprises a heatsink thermally coupled to at least one of the processing unit and the display panel.

4. The system of claim 3, wherein the cooling mechanism further comprises at least one fan arranged to cool the heatsink.

5. The system of claim 4, wherein the at least one fan is retrofittable and is automatically activated by the processing unit in response to the temperature monitoring signal.

6. The system of claim 1 , wherein the housing is substantially ventless.

7. The system of claim 1 , wherein the at least one temperature sensor comprises a screen temperature sensor configured to monitor an open cell temperature of the display panel.

8. The system of claim 1 , wherein the at least one temperature sensor comprises a battery temperature sensor configured to monitor a temperature of the power source.

9. The system of claim 1 , further comprising an image capturing device communicatively coupled to the processing unit.

10. The system of claim 9, wherein the processing unit is further configured to analyze images from the image capturing device to determine an absence of a viewer in a field of view and, in response to determining the absence of a viewer, automatically reduce the brightness of the display panel to conserve power.11 .The system of claim 1 , further comprising a backlight module for the display panel, wherein the backlight module is a mini-LED backlight configured to perform local dimming.

12. The system of claim 1 , further comprising an HDMI to Low-Voltage Differential Signaling (LVDS) converter configured to interface the processing unit with the display panel.

13. The system of claim 1 , further comprising a communication module communicatively coupled to the processing unit, the communication module configured for wireless communication with a remote server.

14. The system of claim 13, wherein the communication module comprises a 4G LTE module.

15. The system of claim 1 , further comprising a location sensor communicatively coupled to the processing unit.

16. The system of claim 1 , further comprising at least one gravity sensor communicatively coupled to the processing unit, wherein the processing unit is configured to adjust an orientation of content on the display panel based on a signal from the at least one gravity sensor.

17. The system of claim 1 , wherein the housing is configured for mounting on a wearable item or a vehicle.

18. The system of claim 1 , wherein the housing is sealed to achieve an IP67 rating.

19. The system of claim 1 , wherein the power source is a battery comprising lithium iron phosphate cells.

20. A method for managing a portable display system, the method comprising: displaying content on a display panel of the portable display system; monitoring a temperature of at least one component of the portable display system using at least one temperature sensor; determining if the monitored temperature exceeds a predefined threshold; and in response to determining that the temperature exceeds the predefined threshold, automatically reducing a brightness of the display panel.21 .The method of claim 20, wherein monitoring a temperature of at least one component comprises monitoring an open cell temperature of the display panel.

22. The method of claim 20, wherein monitoring a temperature of at least one component comprises monitoring a temperature of a power source of the portable display system.

23. The method of claim 20, further comprising, in response to determining that the temperature exceeds the predefined threshold, activating at least one fan to direct airflow across a heatsink thermally coupled to at least one of a processing unit or the display panel.

24. The method of claim 20, further comprising: measuring an ambient light level using a light sensor; and dynamically adjusting the brightness of the display panel based on the measured ambient light level to optimize visibility and power consumption.25.The method of claim 20, further comprising: capturing images of a field of view of the portable display system with an image capturing device; analyzing the captured images to determine an absence of a viewer in the field of view; and in response to determining the absence of a viewer, automatically reducing the brightness of the display panel to conserve power.

26. The method of claim 20, wherein displaying content further comprises performing local dimming by selectively adjusting a brightness of zones of a mini-LED backlight of the display panel to enhance image contrast and reduce power consumption.27.The method of claim 20, further comprising: detecting an orientation of the portable display system using at least one gravity sensor; and adjusting an orientation of the content displayed on the display panel based on the detected orientation.28.The method of claim 20, further comprising: determining a location of the portable display system using a location sensor; and selecting content for display on the display panel based on the determined location.29.The method of claim 20, further comprising: communicating with a remote server via a wireless communication module; receiving data from the remote server, the data comprising content for display; and displaying the received content on the display panel.

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