The pervasive display represents one of the young and interesting areas of the research field. It is actually the growth in the display availability in a broad and diverse spectrum of sizes, input/output capabilities, power usage, portability etc. This basically includes un-coordinated and coupled displays, on and around the body or on the environment.
In most of the areas of computer science, there are well-accepted techniques and tools that help us to answer many research-related queries. But in the case of researches in pervasive displays, there is no widely accepted test datasets, tools, techniques etc. There is a personal, shared, public and semipublic system which is a part of a larger display system that surrounds many people in their daily life. Pervasive display systems are traditionally been used for advertising purposes and for information dissemination in highly crowded areas like airports, shopping mall etc.
Pervasive Displays always provides a wide range of high resolution, high contrast, sunlight readability, and ultra-low energy consumption standards and custom EPD panels. These kinds of bi-stable e-paper displays are designed for commercial, industrial, and certain embedded applications.
While considering a single display – a handheld display is comfortably visible by only a single user at a time. A large wall displays are normally visible to multiple users and allow simultaneous interaction with many people. Pervasive displays that normally consisting of coordinated multi-display environments are quite common. Personal and intimate display devices like head mounted displays, tablets, smartphones, watches will become part of such display environments in the future. These kinds of display environment can be formed by combining multiple handhelds, head mounted and other personal or appropriated displays.
Researching in the areas of pervasive display systems are extremely challenging due to a number of reasons. First of all, there is no single goal for the pervasive system to achieve. In the case of ads, they strive for maximizing the public attention; the main idea behind the interactive games is to create an engaging experience. The motive behind some of the displays is to fade into the background; it simply presents the ambient information. As a result, matrices of the display systems need to cope up with different contents, situations, and purposes if meaningful comparisons are necessary.
The systems need to be evaluated because there are no models needed for experimentation. Also conducting the field studies of pervasive display system seems to be extremely challenging while considering its investment needed for its success.
Privacy and Security:
Its display is equipped with a lot of sensors that arises the privacy concern of the user. For example, it is used to identify the user in front of the display and create a movement profile across the display network. The similar problem arises as displays enable user-generated content that requires personal data’s like an email address to be provided. Lots of projects have explored this topic include Alt c al. However, mobile phones can be used to overcome this kind of privacy issues. When exchanging personal information with a display, shoemaker, and Inkpen who explored a novel interaction technique, allows private information to be shown in our shared display.
The pervasive display has a very strong social impact. Examples are displays that connect communities and displays showing contents that serve as social interaction- like engaging the user to play or picture together. Such perspective project includes the City Wall, a large display in Helsinki, which allows multiple users to browse photos and content on the flick. Investigative role of the user, configuration and fun square, an application that uses contextual information about a place to create fun facts, trying to make passersby discuss the content.
Most of the displays aim to minimize the interaction time. For example, a display providing the travel information at a railway station should provide an interface which allows its users to find the necessary information effortlessly. Besides, studies in user performance include the comparison of direct touch in the display, mobile phone and in-depth investigation of interaction technique based on camera, mobile phones or direct touch. User performance is qualified by assessing task completion time and error rates. Despite not being portable, its display offer number of benefits in terms of scale and proximity that can lead to high level of user performance in any case.
Defining and effectiveness of display have always been challenging. However in commercial context owners of displays often want to know how many views a display attracts and how much revenue a display generates and these criteria can be considered as a measurement for attractiveness; while commercial audience’s measurement is still in its beginning phase.
Pervasive Displays launches 12.2-inch color ePaper display… but probably not for eReaders or tablets:
A small group of folks has been insisting for color eReaders for years. Amazon and few other companies continue to crank out both entry-level eReaders and high-end models with premium specs and they all tend to have grayscale displays. But that doesn’t mean color ePaper is dead. Pervasive Displays just unveiled a new 12.2-inch electronic paper display that supports color and by color, it uses E Ink’s Spectra technology to do black, white, and one other color in this case, red. Use this low-power, high-contrast, and sunlight readable display for Signage with Pervasive Displays, it could be used in retail, the point of sales, office automation, or healthcare applications. Its display resolution of 960 x 768, that means it, has just about 103 pixels per inch. Its pixel density and limited color support mean this isn’t a display you’d really want to use for digital magazines, color eBooks or other entertainment applications. But the extra color could add a bit of pop to signs. The screen is easy to read in sunlight and doesn’t use any power to display a persistent image; it could be used for outdoor signage or for public transit or other devices that are in motion through a range of environments and lighting conditions. If you want to read full-color content on a handheld device, you’re probably still best off with a tablet rather than an eReader.