OLED Backlight Beam Deflection for Autostereoscopic Displays
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Solution Overview
Problem
Existing OLED backlight systems for liquid crystal displays lack the ability to adjust the direction of light emission, preventing the creation of desired autostereoscopic effects for 3D displays without the need for external appliances like glasses.
Innovation Solution
A pixel array with main illumination areas subdivided into sub-illumination areas, each equipped with a beam deflection unit to direct light output differently, combined with a control system that adjusts the emission direction based on observer position, using OLED strips and modulation pixels for adaptive backlighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional OLED backlight system is used, then the display achieves uniform illumination, but the system lacks the ability to adjust light emission direction for autostereoscopic effects
Solution Approach 1:
The backlight system is segmented into multiple independently controllable OLED string elements arranged in a grid pattern. Each string element can be individually activated or deactivated to direct light toward specific viewing zones, enabling directional light emission control without requiring a complete system redesign.
Solution Approach 2:
The system dynamically adjusts which OLED string elements are activated based on the detected observer position. The control system continuously modifies the illumination pattern by selectively turning on/off specific strings, allowing real-time adaptation of light emission directions to track observer movement and enable autostereoscopic effects.
2Ease of operation
If beam deflection units are added to each main illumination area, then directional light control is achieved, but device complexity increases
Solution Approach 1:
The system uses the display device's existing sensor capabilities to detect observer position and automatically adjusts the OLED string activation pattern accordingly. The control system self-regulates the illumination directions without requiring external control devices, making the adaptive tracking function operate autonomously based on detected observer location.
3Manufacturing precision
If OLED strips are subdivided into multiple sub-illumination areas, then precise light direction control is enabled, but manufacturing complexity increases
Solution Approach 1:
The OLED string elements serve multiple functions: they provide both the light source and the directional control mechanism. By selectively activating different strings within the same physical array, the system achieves multiple emission directions without requiring separate optical components for each direction, simplifying the manufacturing process while maintaining precise angular control.
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 the production of 3D image impressions without external appliances, allowing for user-adaptive tracking and efficient, scalable, and switchable backlighting for both 2D and 3D display modes.
Implementation Method 1
Based on luminous elements, such as OLEDs (organic light emitting diode), novel flat displays and/or flat image displays with many advantages may be realized
Implementation Method 2
a first OLED multi-layer structure capable of emitting light in a red frequency spectrum, a second OLED multi-layer structure adjacent to the first OLED multi-layer structure and capable of emitting light in a green frequency spectrum, and a third OLED multi-layer structure adjacent to the second OLED multi-layer structure and capable of emitting light in a blue frequency spectrum
Data Source
AI summary
An illumination device has a plurality of main illumination areas subdivided into at least a first and a second sub-illumination area, wherein a luminous element for outputting radiation is arranged on each sub-illumination area, and wherein a beam deflection unit is associated with each main illumination area, which is designed to deflect the radiation output by the luminous element of the first sub-illumination area into another direction than the radiation output by the luminous element of the second sub-illumination area.