Privacy Display Optics With Segmented Voltage and Lens Collimation
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Solution Overview
Problem
Current electronic devices with privacy protection functions suffer from light leakage at large viewing angles, compromising privacy.
Innovation Solution
An electronic device with a light emitting unit, a first viewing angle control unit, and a lens array, where the viewing angle control unit is divided into regions and controlled by different voltages to modulate light transmission, and the lens array collimates divergent light to reduce light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a privacy protection function is implemented in electronic devices, then privacy protection is improved, but light leakage at large viewing angles occurs
Solution Approach 1:
The viewing angle control unit is divided into multiple regions (first region and second region) that are adjacent to each other. Each region can be controlled by different voltages independently, allowing selective control of light transmission in different viewing angle ranges. This segmentation enables the device to block light at large viewing angles while maintaining normal transmission at appropriate angles, thus reducing light leakage while preserving privacy protection.
Solution Approach 2:
Different regions of the viewing angle control unit are subjected to different voltages to create local variations in light transmission properties. The first region and second region have different transmission states based on their respective voltage conditions, enabling localized control over light leakage in specific viewing angle directions while maintaining privacy protection in other directions.
2Reliability
If the viewing angle is narrowed to prevent light leakage, then privacy protection is improved, but the display viewing angle is reduced
Solution Approach 1:
The viewing angle control unit dynamically adjusts its light transmission properties by applying different voltages to different regions based on operational conditions. The device can switch between different voltage states to control whether light is blocked or transmitted in specific viewing angle ranges, allowing the viewing angle to be dynamically adjusted rather than fixed, thus maintaining privacy protection while preserving adequate display viewing angle when needed.
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 effectively reduces light leakage at large viewing angles, enhancing privacy by narrowing the viewing angle and preventing interference with drivers in automotive applications.
Implementation Method 1
a lens array and a display unit. The lens array is disposed on the first viewing angle control unit
Implementation Method 2
In the privacy mode, a first voltage is provided to the first region of the first viewing angle control unit, a second voltage is provided to the second region of the first viewing angle control unit
Data Source
AI summary
An electronic device configured to switch between a share mode and a privacy mode includes a light emitting unit, a first viewing angle control unit, a lens array and a display unit. The first viewing angle control unit is disposed on the light emitting unit and includes a first region and a second region adjacent to the first region. The lens array is disposed on the first viewing angle control unit. The display unit is disposed on the lens array. In the privacy mode, a first voltage is provided to the first region of the first viewing angle control unit, a second voltage is provided to the second region of the first viewing angle control unit, and the first voltage is different from the second voltage.