Adjustable Reflective Display with Gaze Tracking Control
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Solution Overview
Problem
Conventional electronic devices with displays lack adjustable reflectance and transmittance capabilities, making them unsuitable for applications requiring high reflectance and dynamic adjustments based on user interaction.
Innovation Solution
Incorporating an adjustable reflectance and transmittance layer with a linear polarizer, reflective polarizers, and an adjustable liquid crystal layer, controlled by switchable polarizers and control circuitry to dynamically adjust reflectivity and transmittance levels, allowing for dynamic rearrangement of reflective and non-reflective areas based on user input and gaze tracking information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional display is used, then the display structure is simple and easy to manufacture, but the display lacks adjustable reflectance and transmittance capabilities
Solution Approach 1:
The display incorporates a tunable reflectivity layer with liquid crystal molecules and dichroic dye molecules that can dynamically adjust their optical properties in response to applied voltages, transforming the static display into a dynamic system with adjustable reflectance and transmittance characteristics
Solution Approach 2:
The display uses a composite structure combining multiple functional layers including liquid crystal molecules, dichroic dye molecules, polarizers, and reflective polarizers working together to achieve the desired adjustable optical properties that neither material could provide alone
2Adaptability or versatility
If the display has fixed reflectivity, then the manufacturing process is simple, but the display cannot adapt to different viewing conditions and user interactions
Solution Approach 1:
The display enables continuous adjustment of optical parameters (reflectivity and transmittance) by changing the electrical voltage applied to the liquid crystal and dichroic dye layers, allowing adaptation to different viewing conditions without requiring multiple fixed displays
3Illumination intensity
If the display is fully reflective, then ambient light visibility is improved, but content display capability is reduced
Solution Approach 1:
The display can create different optical zones within the same display area, allowing certain regions to be highly reflective for ambient light visibility while other regions remain transparent for content display, with the ability to dynamically reposition these zones based on user interaction
Data Source
AI summary
An electronic device may have a display. Input-output circuitry in the electronic device may be used to gather input from a viewer of the display. The input-output circuitry may include a gaze tracking system that gathers point-of-gaze information, vergence information, and head position information, may be a biometric sensor, may be an input device such as a button or touch sensor, may capture hand gestures, and/or may gather other information. The display may include a pixel array for producing images. An adjustable reflectance and transmittance layer may overlap the pixel array. Control circuitry in the electronic device may individually adjust different areas of the adjustable reflectance and transmittance layer. The control circuitry may place each area in a reflective mirror more or in a content-displaying mode and may move the areas in response to the information.