Liquid Crystal Light Guiding Component for Real-Time Eye Tracking
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Solution Overview
Problem
Existing eye tracking modules are unable to be controlled in real time, leading to resource wastage and occupy a large volume, which is not suitable for thin size requirements in human-computer interaction applications.
Innovation Solution
A light guiding component with liquid crystal structures between electrodes, allowing for controlled deflection of light rays to emit along a predetermined direction, integrated into an eyeball tracking module within video eyeglasses, enabling real-time controllability and reducing module size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional eye tracking modules are used, then eye tracking function is achieved, but the module occupies large volume and cannot be controlled in real time
Solution Approach 1:
The patent applies the dynamics principle by making the light guiding component controllable through liquid crystal structures that can dynamically change their optical properties in real-time. The liquid crystal molecules can be electrically controlled to alter light transmission direction, enabling real-time control of the eye tracking module without requiring large mechanical moving parts.
Solution Approach 2:
The patent replaces traditional mechanical eye tracking systems with an optical control mechanism using liquid crystal structures. Instead of mechanical moving parts or mirrors, the system uses electrically controlled liquid crystal molecules to deflect light rays, substituting mechanical systems with field-based optical control that reduces module size and enables real-time control.
2Ease of operation
If traditional light guiding methods are used, then light transmission is achieved, but real-time control and compact size are not possible
Solution Approach 1:
The patent applies parameter changes by utilizing the electrical properties of liquid crystal molecules. By changing the applied voltage parameter, the orientation and refractive index of liquid crystal molecules change, which dynamically alters the light transmission direction. This allows real-time control through simple electrical parameter adjustment rather than complex mechanical or optical mechanism changes.
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 allows for real-time control of the eyeball tracking module and reduces its volume, meeting the requirement for a thin size while saving computing resources by directing light emission effectively.
Implementation Method 1
The first electrode and the second electrode are configured to control a deflection direction of the liquid crystal molecules with an applied voltage, so that a light ray incident to the light guiding component, which meets a threshold condition, is emitted along a predetermined direction
Implementation Method 2
at least one liquid crystal structure disposed between the first electrode and the second electrode, the liquid crystal structure including liquid crystal molecules
Data Source
AI summary
A light guiding component is provided in an eyeball tracking module which includes a first substrate and a second substrate disposed opposite to each other, a first electrode disposed on the first substrate, a second electrode disposed on the second substrate, and at least one liquid crystal structure disposed between the first electrode and the second electrode. The liquid crystal structure includes liquid crystal molecules. The first electrode and the second electrode are configured to control a deflection direction of the liquid crystal molecules with an applied voltage, such that a light ray incident to the light guiding component, which meets a threshold condition, is emitted along a predetermined direction.