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Method and System for Automatic Alignment of Projection for Dynamic Screen Angle Changes

IP.com Disclosure Number: IPCOM000239179D
Publication Date: 2014-Oct-20
Document File: 3 page(s) / 57K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a system to use SONAR and other technologies, to enable multiple projectors to dynamically identify the curvature profile of any curved screen, and accordingly have each individual projector dynamically calculate the projected content focus and alignment to automatically create the perfect picture. The key novelty is the ability of the projection system to automatically realign the projected digital content based on the user flexing a screen as desired.

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Method and System for Automatic Alignment of Projection for Dynamic Screen Angle Changes

The curved screen in newer display units serves two purposes. First, it has an aesthetic appeal that draws in the viewer by enhancing a sense of immersion while enhancing resolution and brightness. The curved screen, together with the anamorphic accessories will increase brightness and enhance resolution by up to 30%. It does this by eliminating the black margins that can appear on the projection surface of flat cinemascope screens. However, the curved large screen television is expensive.

Current systems use beamer projectors for flat surface projecting; projection units are for flat screens. There are many advantages of this. For example, users can project content on a wall. The projector can also be used on televisions for video content and other purposes. Big screen televisions and flexible display televisions are also popular. In the case of the flexible displays, a user can bend the television display screen in any way to enhance the viewing experience.

Figure 1 shows the problem with projection content displays. As per the diagram, ABGH is a curved display, whereas projector projects in a flat surface in the path CDEF. Thus, the distances C to D, D to E, and E to F are all equal, while the corresponding distances between A, B, G, and H are not the same. Therefore, if the system projects any digital content in a curve surface, then some portion becomes stretched and some portion becomes condensed.

Figure 1: Typical front projection on a curved screen is distorted

A method is needed to produce a lower cost curved screen television, while allowing the user the option to change the curvature as per individual requirements, and maintain a high quality image.

The novel contribution is a television system that uses a SOund Navigation and Ranging (SONAR) receiver and sender to dynamically identify the curvature profile of the screen. Based on the identified curvature profile, individual projectors (possibly multiple) automatically align the content to be projected. The key novelty is the ability of the projection system to automatically realign the projected digital content based on the user flexing a screen as desired.

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Following are some examples of different types screen curvatures, along with possible different positions of the room for screen viewers. The user may frequently adjust the television shape while moving about the room to different positions (wants to change seats, be able to see from another room, etc.).

Figure 2: Various screen angles and manipulations or reshaping of flexible and curved screens

The system adds novel capabilities to front projection units to automatically notice changes in flexible display shapes, and thus automatically adjusting associated...