Eyeglasses-Free Display Towards Correcting Visual Aberrations with Computational Light Field Displays

Applications

The primary applications for this visual correction technique are in the design and manufacturing of consumer devices that make use of digital displays, ranging from traditional monitors and laptops to smartphones and more compact or specialized technologies. Given the large number of potential users, the technology will have broad appeal in both professional and private environments.

This technology would appeal to companies who produce consumer devices with digital displays, such as laptops, smartphones, tablets, and home computer monitors. If the described system were implemented into the software controlling the display, it would allow for a greater degree of product accessibility and enable a wider market reach. This would make a manufacturer’s devices much more appealing to consumers with visual aberrations and generally poor eyesight. This technology may also extend the product’s viability to more specific, controlled situations where visual clarity is a necessity, such as certain medical or care environments.   

Problem Addressed

Large sections of the population and workforce require some form of visual correction method, ranging from traditional eyeglasses, contact lenses, or invasive optical surgery. This, in combination with the near universal adoption of computer technology in professional and private environments, has produced a largely unfulfilled demand for non-invasive visual correction methods and technologies integrated within digital displays. Prior attempts to address this issue have produced results of substantially lower image quality than traditional displays.

Technology

A number of attempts at creating a vision correcting display have been made in the past, some making use of light field display technologies, while others have opted for multilayer devices with integrated prefiltering methods. However, the former often resulted in substantially lower resolution images than conventional displays, while the latter resulted in greatly reduced image contrast.

The presented technology mitigates these negative effects by striking a balance between the strengths of light field displays and the robust nature of prefiltering algorithms and inverse blurring techniques. This allows for a dynamic visual correction method without the same degree of drastic loss of image resolution or contrast, utilizing standard off-the-shelf hardware. This method of light field prefiltering allows for a dynamic solution to the problem of visual correction that can address a range of optical problems and has the potential to be tailored to the needs of the individual user. Furthermore, this method may also be used to accommodate higher-order conditions that many traditional methods are unable to sufficiently correct.     

Advantages

  • Compensates for visual problems without the need for invasive traditional means
  • Preserved image resolution and contrast compared with prior techniques
  • Can accommodate higher-order conditions that other methods struggle with
  • Makes use of inexpensive off-the-shelf hardware