Display Screen Privacy Control via Dynamic Eye-Tracking Image Manipulation
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Solution Overview
Problem
Display screens struggle to maintain privacy in various ambient light conditions, especially when residual light penetrates through restricted viewing modes, compromising the security of sensitive information.
Innovation Solution
A method that dynamically adjusts image data parameters such as contrast, brightness, resolution, and color space on a display screen, using eye-tracking to determine viewer position, and applies these changes only when the viewer is within a specific angular range to enhance privacy in restricted viewing mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If scattering particles are provided in the light guide to achieve restricted viewing mode, then privacy is improved, but residual light penetrates through at higher concentrations reducing privacy effect
Solution Approach 1:
The patent changes the optical parameters of the light guide by introducing scattering particles with specific properties. The particles have a scattering coefficient and absorption coefficient that are optimized to maximize light scattering in the restricted viewing direction while minimizing residual light penetration. This parameter optimization resolves the contradiction between achieving strong privacy effect and preventing residual light penetration.
2Ease of operation
If the viewing angle is widened to share information with others, then ease of operation is improved, but privacy protection deteriorates
Solution Approach 1:
The patent applies local quality by creating different viewing characteristics in different angular directions. The light guide is designed so that light propagates differently at different angles - with strong scattering and privacy protection in the forward direction (where the driver would view), while allowing broader viewing angles for passengers. This directional differentiation resolves the contradiction between ease of operation for multiple viewers and privacy protection.
3Reliability
If image manipulation is applied to enhance restricted viewing mode, then privacy is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service by making the light guide structure itself perform the privacy protection function through its inherent optical properties. The scattering particles and light guide geometry automatically create the restricted viewing mode without requiring external control systems or complex image manipulation. The system self-regulates light propagation based on viewing angle, resolving the contradiction between privacy security and device complexity.
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
Significantly enhances the privacy of information displayed on a screen by reducing visual perceptibility of image data for unintended viewers, even in bright environments, and can completely shut down the display to maintain privacy, especially beneficial in vehicles during night drives.
Implementation Method 1
These scattering particles consist of polymerizate and may, under certain circumstances, especially in case of higher concentration, result in scattering effects that reduce the privacy effect in the restricted mode
Data Source
AI summary
A method for manipulation of image data for a display screen that can be operated in two operating modes, viz B1 for a free viewing mode and B2 for a restricted viewing mode, comprising: a) switching on the operating mode B2, b) monitoring the eye position of a viewer in a given angular range A, with a signal S being set if the eye position signifies that the viewer is looking at the screen, and being deleted if not looking at the screen, c) manipulating the image data with regard to image parameters, wherein the said manipulation i) is performed to the effect that the quality of the restricted viewing mode B2 is enhanced, ii) is dynamically implemented in a control unit of the display screen, and iii) is performed exclusively while the signal S remains set, and d) repeating steps b) and c) until operating mode B2 concluded.