Dual-Emitter Display Pixels for Directional Privacy Viewing
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Solution Overview
Problem
Existing display devices in vehicles do not effectively restrict image viewing from specific directions, posing a distraction risk to drivers.
Innovation Solution
A display device with a display panel incorporating public and privacy light-emitting elements, controlled by a driving controller that adjusts emission based on selection signals to ensure images are visible only from intended viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a display device is installed in a vehicle to provide visual information to passengers, then passengers can view content, but drivers may also view the image causing distraction
Solution Approach 1:
The pixel is divided into two distinct light-emitting elements: a public light-emitting element for driver visibility and a privacy light-emitting element for passenger visibility. This segmentation allows different viewing zones to access different content, preventing driver distraction while maintaining passenger entertainment capability
Solution Approach 2:
Different regions of the display have different light emission characteristics. The public light-emitting element emits light visible to the driver, while the privacy light-emitting element emits light visible only to passengers. This local quality differentiation ensures that content is selectively accessible to specific audiences based on their position relative to the display
2Device complexity
If a single light-emitting element is used in the pixel, then the device structure is simple, but viewing angle control and privacy protection are insufficient
Solution Approach 1:
The pixel is divided into two distinct light-emitting elements: a public light-emitting element for driver visibility and a privacy light-emitting element for passenger visibility. This segmentation allows different viewing zones to access different content, preventing driver distraction while maintaining passenger entertainment capability
Solution Approach 2:
Different regions of the display have different light emission characteristics. The public light-emitting element emits light visible to the driver, while the privacy light-emitting element emits light visible only to passengers. This local quality differentiation ensures that content is selectively accessible to specific audiences based on their position relative to the display
3Adaptability or versatility
If both public and privacy light-emitting elements are activated simultaneously, then all viewers can see the image, but energy consumption increases and stress on light-emitting elements increases
Solution Approach 1:
The display system dynamically switches between different operating modes (public mode, privacy mode, and combined mode) based on real-time conditions. The driving controller activates only the necessary light-emitting elements for the current viewing situation, optimizing energy consumption while maintaining viewing flexibility when needed
Solution Approach 2:
The system periodically switches between different light-emitting element activation patterns based on detected viewing conditions. Instead of continuous full activation, the controller alternates between activating public elements, privacy elements, or both, depending on whether driver or passenger viewing is prioritized at each moment
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
Enables selective image visibility, preventing distractions for drivers while allowing passengers to view content, enhancing safety and usability in vehicle environments.
Implementation Method 1
a public light-emitting element that emits light when the first selection signal is in an active level
Implementation Method 2
a privacy light-emitting element that emits light when the second selection signal is in an active level
Implementation Method 3
a light control pattern that overlaps the privacy light-emitting element of the pixel on a plane
Data Source
AI summary
Disclosed is a display device, which includes a display panel and a driving controller that provides a first selection signal and a second selection signal to the display panel. The display panel includes a pixel including a public light-emitting element that emits light when the first selection signal is in an active level and a privacy light-emitting element that emits light when the second selection signal is in an active level, and a light control pattern that overlaps the privacy light-emitting element on a plane. The driving controller calculates privacy stress data corresponding to the privacy light-emitting element based on public stress data corresponding to the public light-emitting element when the second selection signal is in the active level, performs a stress compensation for the image input signal based on the privacy stress data, and outputs the image data signal.