Dual View Display Cross-Talk Reduction via Light Blocking Elements
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Solution Overview
Problem
Dual View display devices experience cross-talk due to overlapping viewing angles and internal reflections, which affect the clarity of separate views generated by assigning pixels to different viewing angles.
Innovation Solution
Incorporating a color generating layer with light blocking elements between the array metal circuitry and color elements to prevent light reflection and internal cross-talk, and arranging the light source to pass through a barrier layer and color elements, reducing cross-talk by blocking light transmission between adjacent color elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single barrier is used to direct light for dual views, then the device structure is simplified, but cross-talk occurs due to overlapping viewing angles and internal reflections
Solution Approach 1:
The patent divides the single barrier into multiple barriers (first barrier layer and second barrier layer) positioned at different depths within the pixel structure. This segmentation allows each barrier to control light for specific viewing angles independently, preventing cross-talk between dual views while maintaining structural organization.
Solution Approach 2:
The patent introduces light-blocking elements (such as black matrix or light-absorbing materials) as intermediary components between the color filter and the barriers. These intermediaries absorb or block stray light and internal reflections that would otherwise cause cross-talk, acting as mediators to eliminate harmful optical interactions.
2Adaptability or versatility
If one half of the pixels is assigned to the first view and another half to the second view, then two different views can be generated simultaneously, but cross-talk occurs due to internal reflection on array metal circuitry
Solution Approach 1:
The patent addresses internal reflection from array metal circuitry by introducing light-blocking elements in the vertical dimension between the color filter and the barriers. This dimensional approach blocks reflected light paths that would otherwise cause cross-talk between adjacent pixels assigned to different views.
Solution Approach 2:
The patent converts the potentially harmful internal reflections from array metal circuitry into beneficial light-blocking opportunities by strategically placing light-absorbing materials in the optical path. These materials transform reflected light that would cause cross-talk into absorbed energy, eliminating the harmful effect.
3Device complexity
If light passes through color elements without additional blocking structures, then the device is simpler, but light reflects off array metal circuitry and transmits to adjacent color elements causing cross-talk
Solution Approach 1:
The patent segments the optical path by introducing light-blocking elements that divide and control light transmission to adjacent color elements. This segmentation ensures that light intended for one viewing angle does not inadvertently reach adjacent pixels, improving viewing angle separation precision.
Solution Approach 2:
The patent implements preliminary light-blocking action by positioning light-absorbing materials before light can reflect off array metal circuitry and reach adjacent color elements. This preliminary intervention prevents cross-talk before it occurs, ensuring precise viewing angle separation.
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
Significantly reduces cross-talk between views by attenuating light reflection and internal reflections, enhancing the clarity and separation of images across the entire viewing angle range.
Implementation Method 1
preventing light, generated for one of the first and second views, from being transmitted by reflection on at least a portion of a surface of the array metal circuitry
Implementation Method 2
light blocking elements for preventing light, generated for one of the first and second views, from being transmitted by reflection
Data Source
AI summary
Display devices for displaying a first and second view are provided. A representative display device includes a color generating layer (CF) and an array layer (AR). The color generating layer incorporates a plurality of color elements arranged in a two-dimensional array extending in a plurality of rows in a horizontal direction (X) and a plurality of columns in a vertical direction (Y). The array layer includes array metal circuitry covering a portion of each of the color elements. The color generating layer includes means for preventing light generated for one of the first and second views from being transmitted by reflection by at least a portion of a surface of the array metal circuitry in a direction of the other of the first and second views.