Light-Emitting Display Optics for Orientation-Based Viewing Control
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Solution Overview
Problem
Existing light emitting display devices struggle to selectively restrict the viewing angle based on user orientation, particularly when transitioning between landscape and portrait modes, leading to inconsistent viewing angle control and potential degradation of aperture ratio and luminous efficiency.
Innovation Solution
The device incorporates first and second light emitting units and lenses that extend in perpendicular directions, allowing for selective viewing angle restriction by refracting light based on the device's orientation, using a gyroscope sensor to adjust the display mode and control the viewing angle accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed viewing angle restriction film or structure is used, then viewing angle is restricted in a specific direction, but the device cannot adapt to orientation changes between landscape and portrait modes
Solution Approach 1:
The patent applies dynamics by making the viewing angle restriction adaptive rather than fixed. The system dynamically adjusts which light emitting units are active based on the detected orientation (landscape or portrait mode), allowing the viewing angle restriction to move and adapt to different device orientations. This resolves the contradiction by enabling versatility without requiring multiple fixed restriction structures.
Solution Approach 2:
The patent changes the operational parameters of the light emitting units based on orientation detection. By switching between different sets of light emitting units (first set for landscape, second set for portrait), the system changes the effective viewing angle restriction parameters dynamically. This allows adaptability across orientations without increasing physical structural complexity.
2Object-affected harmful factors
If viewing angle is restricted using conventional methods, then privacy protection is improved, but aperture ratio degrades and luminous efficiency decreases
Solution Approach 1:
The patent segments the light emitting units into different sets (first light emitting units and second light emitting units) that can be independently controlled. By activating only the necessary segments based on orientation, the system achieves viewing angle restriction without blocking light from the entire display area. This segmentation approach maintains aperture ratio and luminous efficiency while providing privacy protection through selective activation of restricted-viewing-angle units.
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 flexible viewing angle control in both landscape and portrait modes while maintaining aperture ratio and improving luminous efficiency and device lifespan.
Implementation Method 1
a first lens which is disposed on the first light emitting diode and refracts light from the first light emitting diode
Data Source
AI summary
Provided is a light emitting display device. The light emitting display device includes a plurality of pixels is disposed in a display panel and each of the plurality of pixels includes a plurality of sub pixels. Each of the plurality of sub pixels includes a first light emitting diode including a first light emitting unit which extends along in a first direction; a first lens which is disposed on the first light emitting diode and refracts light from the first light emitting diode; a second light emitting diode including a second light emitting unit which extends along in a second direction which is transverse to the first direction; and a second lens which is disposed on the second light emitting diode and refracts light from the second light emitting diode.