Wiregrid Layer for Stress-Induced Light Leaks in Array Substrates
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Solution Overview
Problem
The existing array substrates in display devices suffer from light leaks due to stress-induced deformation of the lower polarizer, which results in phase differences and unwanted light transmission.
Innovation Solution
Incorporating a wiregrid layer with light blocking bars made of reflective material between the substrate and the pixel structural layer, where the light blocking bars are arranged in parallel and spaced equally, effectively blocking unwanted polarized light and reducing stress-induced light leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a lower polarizer is used in the array substrate, then the display can achieve basic polarization function, but stress from the substrate causes the polarizer to deform and generate light leaks
Solution Approach 1:
The patent divides the polarization function into two separate components: a wiregrid layer (made of transparent conductive oxide patterns) and a lower polarizer. The wiregrid layer handles the primary polarization task, allowing the lower polarizer to be removed or minimized, thereby eliminating stress-induced deformation and light leaks while maintaining the polarization function.
Solution Approach 2:
The patent extracts and removes the lower polarizer from the display structure, replacing its function entirely with a wiregrid layer. This extraction eliminates the source of stress-induced deformation while the wiregrid layer independently provides the necessary polarization function.
2Reliability
If the lower polarizer is removed to prevent light leaks, then stress-induced deformation is eliminated, but the polarization function may be insufficient without it
Solution Approach 1:
The patent introduces a wiregrid layer as an intermediary component between the substrate and the pixel structural layer. This wiregrid layer, made of transparent conductive oxide patterns, serves as the primary polarization element, compensating for the removal of the lower polarizer and maintaining the polarization function while preventing stress-induced light leaks.
3Device complexity
If traditional polarizer structure is used, then the structure is simple, but stress from substrate causes phase differences and unwanted light transmission
Solution Approach 1:
The patent segments the polarization function from the lower polarizer and assigns it to a dedicated wiregrid layer. This segmentation allows the wiregrid layer to be optimized for polarization without being affected by substrate stress, eliminating light leaks while maintaining structural simplicity through functional separation.
Solution Approach 2:
The patent changes the material parameter from traditional polarizer materials to transparent conductive oxide for the wiregrid layer. This material change enables the polarization function to be performed without stress-induced deformation, as the wiregrid structure is less susceptible to substrate stress effects.
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
The wiregrid layer design significantly reduces light leaks by selectively allowing only P-polarized light to pass through while reflecting other polarized light, enhancing display brightness and reducing stress-induced deformations, thereby improving the overall display performance.
Implementation Method 1
selectively allowing only P-polarized light to pass through while reflecting other polarized light
Implementation Method 2
reflecting other polarized light
Data Source
AI summary
An array substrate and a display including the array substrate, the array substrate includes a substrate (1); a pixel structural layer formed on the substrate (1); and a wiregrid layer (6) located between the substrate (1) and the pixel structural layer. The wiregrid layer (6) includes a plurality of light blocking bars (4) arranged in parallel. With the wiregrid layer (6) formed of light blocking bars (4), an occurrence of light leak due to a stress generated by the substrate (1) can be avoided.