Video Projection With Maxwellian View and Pupil-Adaptive Brightness
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Solution Overview
Problem
Existing image projection methods struggle to provide a clear and stable image presentation that is not affected by pupil diameter changes and external light conditions, leading to inconsistent image brightness and clarity.
Innovation Solution
An image projection apparatus that collects and irradiates image display light around the pupil, using a Maxwellian view, and controls the output based on pupil area or size to maintain consistent brightness and clarity, independent of pupil diameter changes and external light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image display light is irradiated to the user's eye using conventional methods, then the image can be displayed, but the image brightness and clarity become inconsistent when pupil diameter changes or external light conditions vary
Solution Approach 1:
The patent employs feedback control by detecting the user's pupil diameter using an imaging device and adjusting the light intensity of the image display light accordingly. The control device modifies the light output based on the detected pupil size, ensuring that the image maintains adequate brightness and contrast regardless of pupil diameter changes or external light conditions. This closed-loop feedback mechanism resolves the contradiction by making the system adaptive to physiological changes while maintaining reliable image display.
Solution Approach 2:
The patent implements dynamic adjustment of light intensity in response to changing pupil diameter. Rather than using fixed light intensity, the system continuously adapts the brightness of the projected image based on real-time pupil measurements. This dynamic control ensures that the image remains clearly visible under varying conditions, resolving the contradiction between maintaining consistent brightness and adapting to physiological changes.
2Illumination intensity
If light intensity of image display light is increased to improve visibility, then the image becomes more visible, but the image may become too bright or cause discomfort when the user's pupil is small or external light is strong
Solution Approach 1:
The system uses feedback control to monitor pupil diameter and adjust light intensity accordingly. When the pupil is small or external light is strong, the detected pupil size triggers a reduction in light intensity, preventing the image from becoming too bright or causing discomfort. Conversely, when the pupil is large or external light is weak, the system increases light intensity to maintain adequate visibility. This feedback mechanism resolves the contradiction by dynamically optimizing brightness while preventing harmful effects.
Solution Approach 2:
The patent changes the light intensity parameter based on detected pupil diameter. By establishing a relationship between pupil size and optimal light intensity, the system automatically adjusts the brightness parameter to maintain comfortable and clear image display. This parameter adjustment strategy resolves the contradiction between achieving sufficient brightness and avoiding excessive brightness that causes discomfort.
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 method ensures stable and adequate image brightness and clarity by controlling the output of image display light, allowing for clear image superimposition on external scenes regardless of pupil diameter changes or external light variations.
Implementation Method 1
a crystalline lens 23 that refracts the image display light 24 and the image light 25
Data Source
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AI summary
To provide new image projection technology. The present technology provides an image projection apparatus including a pupil information acquisition section that acquires a pupil area or size, and an output control section that controls an output of image display light being collected around the pupil and irradiated on a retina on the basis of the pupil area or size acquired by the pupil information acquisition section. In addition, the present technology provides an image projection method including a step of acquiring pupil information to acquire a pupil area or size, a step of controlling an output of the image display light collected around a pupil and irradiated to a retina on the basis of a pupil area or size acquired in the step of acquiring pupil information, and a step of outputting image display light that irradiates the retina with the image display light at the output controlled in the step of controlling the output.