Retinal Projection Eye Examination Apparatus
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Solution Overview
Problem
Existing eye examination methods using image display apparatuses are intrusive and do not accurately assess the retina condition due to the strong correlation between illumination and reflection light intensities, making it difficult to determine the retina's condition without the user's awareness.
Innovation Solution
An image display apparatus that generates light rays corresponding to image pixels, projects them onto the retina, splits and detects reflection light rays, and processes intensities to obtain parameters indicative of the retina's conditions, allowing precise examination without the user's awareness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate eye examination apparatus is used, then the accuracy of eye condition detection is improved, but the user experience deteriorates due to the intrusive nature of separate examinations
Solution Approach 1:
The patent combines the eye examination function with the video display function into a single integrated system. The light source unit that projects video images to the retina simultaneously enables reflection light intensity detection for eye examination, eliminating the need for separate examination apparatus and making users unaware they are being examined.
Solution Approach 2:
The optical system serves multiple functions: it projects video images to the retina for display purposes and simultaneously detects reflection light intensities for eye condition examination. This multi-functionality allows the same hardware to perform both viewing and examination tasks without requiring separate dedicated equipment.
2Illumination intensity
If multiple light rays with different intensities are used to illuminate the retina, then the image quality is improved, but the accuracy of retina condition assessment deteriorates due to the strong correlation between illumination and reflection intensities
Solution Approach 1:
The system measures the actual intensity of each light ray illuminating the retina and uses this information as feedback to correct the reflection light intensity measurements. By obtaining the intensity of illumination light rays and using it to calculate reflection light intensities, the system compensates for variations in illumination and achieves accurate retina condition assessment despite using multiple light rays with different intensities.
3Measurement precision
If scanning projection is used for eye examination, then the measurement precision is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts the eye examination function from complex scanning projection systems and implements it using a simpler non-scanning projection approach. By using a light source unit that directly projects light rays to the retina without requiring scanning mechanisms, the system achieves eye condition detection with reduced device complexity and manufacturing cost.
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
Enables precise examination of the eye's condition by accurately determining the retina's reflectivity and health parameters, such as glaucoma detection and blood glucose levels, while minimizing user awareness and reducing manufacturing costs compared to scanning projection methods.
Implementation Method 1
a light source part that generates a plurality of light rays corresponding to respective pixels in an image
Implementation Method 2
a splitting part that splits a plurality of reflection light rays from positions in a certain site of the eye on the optical path
Data Source
AI summary
An image display apparatus includes: a light source part generating a plurality of light rays corresponding to respective pixels in an image that changes over time; a projecting part defining an optical path from the light source part to an eye, and forming the image on a retina of the eye by projecting the generated light rays directly on the retina through the optical path; a splitting part splitting a plurality of reflection light rays from positions in a certain site of the eye on the optical path, the positions corresponding to the respective pixels; a detecting part detecting intensities of the reflection light rays that have been split; and a processing part obtaining parameters indicative of conditions of the site at the positions corresponding to the respective pixels, based on intensities of the generated light rays and the intensities of the reflection light rays, for the respective pixels.