Tilted OLED Pixels for Autostereoscopic Display Crosstalk
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Solution Overview
Problem
Autostereoscopic 3D displays using OLEDs face challenges with light cross-talk due to the diffuse emission of OLED pixels, which reduces light efficiency and increases crosstalk between views, especially when lenticular lenses are applied, as light is often reflected between lenses, reducing contrast and image quality.
Innovation Solution
The OLED pixels are tilted relative to the display surface, with their emission direction centered around a non-perpendicular angle to the lenticular lens array, reducing crosstalk by separating the light emission angles between views and improving out-coupling performance, while maintaining the flexibility of OLED technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If OLED pixels are used in autostereoscopic displays, then light efficiency is improved compared to LCD, but light cross-talk between views increases due to diffuse emission
Solution Approach 1:
The patent applies local quality by tilting only the OLED pixels beneath each lenticular lens at a specific angle, while other pixels remain in the standard plane. This localized angular adjustment optimizes light extraction for the specific viewing direction required by the lenticular lens, improving light efficiency for the 3D display while containing the angular spread to reduce cross-talk between adjacent views.
2Adaptability or versatility
If lenticular lenses are applied to OLED displays, then autostereoscopic 3D effect is achieved, but light is reflected between lenses reducing contrast and image quality
Solution Approach 1:
The patent changes the angular parameter of OLED pixel emission by tilting pixels at a specific angle relative to the lenticular lens array. This parameter adjustment optimizes the light extraction angle to match the lenticular lens design, reducing unwanted reflections between lenses and improving contrast and image quality while maintaining the autostereoscopic 3D effect.
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
This approach enhances light extraction efficiency and reduces crosstalk between views, improving the overall image quality and contrast in autostereoscopic 3D displays by aligning the OLED emission with the lenticular lens array, thereby enhancing the viewing experience.
Implementation Method 1
OLED or other thin film emissive display such as an electroluminescent display
Implementation Method 2
an array of elongate lenticular elements can be provided extending parallel to one another and overlying the display pixel array
Data Source
AI summary
An autostereoscopic display device uses an electroluminescent display. A set of pixels is provided beneath view forming elements (such as lenses), with a plurality of pixels across the view forming element width direction. The pixels are arranged with at least two different angular orientations with respect to the substrate. The out-coupling performance is improved by arranging for the light emission direction to be substantially perpendicular to the desired emitting surface of the view forming elements.