Micro Lens Array Depth of Field Extension for Vision Correction
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Solution Overview
Problem
Existing display apparatuses, such as liquid crystal and plasma displays, lack diopter adjustment, making it cumbersome for individuals with farsightedness to view images without glasses, especially in outdoor or driving scenarios, as they require frequent lens adjustments which are impractical and dangerous.
Innovation Solution
A display method involving a micro lens array and a mask with apertures that project light beams from each pixel as multiple light beams onto the observer's pupil, with at least one beam having a diameter smaller than the pupil, increasing the depth of field and allowing focused image observation without glasses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reading glasses are used for viewing display apparatus, then image clarity is improved for farsighted individuals, but operation convenience deteriorates due to frequent putting on and taking off
Solution Approach 1:
A contact lens with a specific optical power is introduced as an intermediary between the display apparatus and the eye. The contact lens has positive optical power to converge light beams, enabling farsighted individuals to view the display without reading glasses. The lens is positioned close to the eye to effectively adjust the focal point of light entering the pupil.
2Measurement precision
If reading glasses are used while driving or operating equipment, then image clarity is improved, but safety deteriorates due to distraction from putting on and taking off glasses
Solution Approach 1:
The contact lens serves as a permanent optical intermediary that eliminates the need to repeatedly put on and take off reading glasses. Once worn, the lens remains in place, allowing the user to safely operate equipment or drive without distraction, while still achieving clear image viewing through the display apparatus.
3Device complexity
If conventional display apparatus is used, then device simplicity is maintained, but adaptability deteriorates for users with different diopter requirements
Solution Approach 1:
Instead of modifying the display apparatus itself, a contact lens intermediary is used to adapt the system to users with different diopter requirements. The contact lens has specific optical power to compensate for farsightedness, allowing the conventional display to serve users with various vision conditions without changing the display's structure.
Solution Approach 2:
The optical power parameter of the contact lens is specifically designed to converge light beams and adjust the focal point for farsighted users. By changing the optical parameters of the intermediary lens rather than the display apparatus, the system becomes adaptable to different user needs while maintaining device simplicity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables easy focusing and clear image observation for individuals with farsightedness without the need for glasses, reducing eye strain and improving usability in various settings, including mobile devices and digital cameras.
Implementation Method 1
projecting light beams from the plurality of pixels on a pupil of an eye of an observer
Implementation Method 2
Each diameter of the light beams which are incident on the pupil is smaller than a diameter of the pupil
Data Source
AI summary
A display method of forming an image by using a plurality of pixels includes projecting light beams from the plurality of pixels on a pupil of an eye of an observer, and each diameter of the light beams which are incident on the pupil is smaller than a diameter of the pupil.Moreover, a display apparatus which displays an image having a plurality of pixels includes a micro lens array having a lens corresponding to each pixel, and a plurality of light exit points is formed corresponding to each pixel.Furthermore, an electronic equipment has the display apparatus installed thereon.