Gradual Pixel Aperture Design for Sensor Visibility in Wearable Displays
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Solution Overview
Problem
Conventional wearable devices with pixelated displays face the issue of visible sensor boundaries due to differing pixel densities, leading to undesirable visual effects.
Innovation Solution
A wearable computing device with a pixelated electronic display featuring a gradually varying pixel aperture size that decreases from a baseline to zero, creating a miniature 'hole' for image sensors, making the sensor boundary less visible.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pixel density is increased in the sensor area to improve image sensitivity, then the sensor boundary becomes visible causing undesirable visual effects
Solution Approach 1:
The patent applies different pixel aperture sizes in different regions of the display. The sensor area has a first pixel aperture size optimized for light transmission and sensor sensitivity, while the non-sensor area has a second pixel aperture size optimized for display quality. This local differentiation allows each region to have optimal properties for its specific function without compromising the other.
Solution Approach 2:
The patent changes the pixel aperture size parameter across different regions of the display. By adjusting this physical parameter, the display achieves high light transmission in the sensor area for improved image sensitivity while maintaining appropriate display characteristics in the non-sensor area, thereby preventing the sensor boundary from being visible.
2Object-generated harmful factors
If pixel aperture size is decreased in the sensor area to improve display quality, then image sensitivity deteriorates
Solution Approach 1:
The patent implements local quality optimization by assigning different pixel aperture characteristics to different functional zones. The sensor region uses larger pixel apertures to maximize light transmission and sensitivity, while the display region uses smaller pixel apertures for superior display quality, eliminating the need to compromise either property globally.
Solution Approach 2:
The patent employs parameter changes in the pixel aperture size to resolve the contradiction. By varying this parameter spatially across the display, the system achieves optimal light transmission in the sensor area for high image sensitivity while maintaining appropriate display quality in the non-sensor area.
3Ease of manufacture
If uniform pixel density is used across the entire display, then manufacturing is simplified but the sensor boundary becomes visible
Solution Approach 1:
The patent implements local quality by differentiating pixel aperture characteristics between the sensor area and non-sensor area. This approach accepts increased manufacturing complexity as a necessary trade-off to eliminate the visible sensor boundary, with each region optimized for its specific functional requirements.
Data Source
AI summary
A computing device includes a pixelated electronic display having a substrate and a plurality of pixels arranged thereon. The plurality of pixels includes, at least, a first portion of pixels and a second portion of pixels. The second portion of pixels has a gradually varying pixel aperture size. The computing device also includes at least one sensor positioned under the pixelated electronic display and adjacent to the second portion of pixels having the gradually varying pixel aperture size and at least one processor communicatively coupled to the at least one sensor for controlling the computing device.