Viewing-Angle Improving Layer for Large LCD Panels
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Solution Overview
Problem
Current large-size liquid crystal display (LCD) panels have unsatisfactory large-viewing-angle-display effects due to the size limitations of the viewing-angle improving layer, which is typically manufactured using nanoimprinting technology.
Innovation Solution
Incorporating a first viewing-angle improving layer between the TFT array substrate and the opposite substrate, allowing it to be manufactured integrally with other film layers using methods like whole surface coating or deposition, thereby overcoming size limitations and improving the viewing-angle display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If nanoimprinting technology is used to manufacture the viewing-angle improving layer, then the manufacturing precision and structure control are improved, but the size of the viewing-angle improving layer is limited and cannot be made large
Solution Approach 1:
The patent replaces the mechanical nanoimprinting system with a chemical deposition system. Instead of using a physical mold to imprint the viewing-angle improving layer pattern, the invention uses chemical vapor deposition or atomic layer deposition to form the layer conformally on the substrate, eliminating the size limitations of mechanical imprinting while maintaining precise structural control through deposition process parameters
Solution Approach 2:
The deposition process used to manufacture the viewing-angle improving layer can be applied universally across substrates of any size, including large-size substrates (55 inches, 65 inches, 75 inches, or beyond). The same deposition equipment and process can produce both small and large substrates, making the manufacturing method universally applicable without the size constraints of nanoimprinting molds
2Ease of manufacture
If the viewing-angle improving layer is disposed outside the liquid crystal cell, then the manufacturing process is simplified, but the large-viewing-angle-display effect of large-size LCD panels is unsatisfactory
Solution Approach 1:
The patent merges the viewing-angle improving layer with the liquid crystal cell structure by disposing the layer within the liquid crystal cell, specifically on the liquid crystal layer or between the liquid crystal layer and the color filter layer. This integration ensures that the viewing-angle improvement function works effectively with the liquid crystal display structure, achieving satisfactory large-viewing-angle-display effects for large-size panels while maintaining manufacturing feasibility
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 the large-viewing-angle-display effect by increasing luminance and contrast while reducing manufacturing costs and color-shift issues, effectively addressing the limitations of nanoimprinting technology.
Implementation Method 1
at least one first viewing-angle improving layer, one of the at least one first viewing-angle improving layer adjoining a film layer in the TFT array substrate or the opposite substrate on a light exit side of the display panel
Data Source
AI summary
A display panel includes a thin film transistor (TFT) array substrate, an opposite substrate, and a liquid crystal layer disposed between the TFT array substrate and the opposite substrate. The TFT array substrate includes a first substrate. The opposite substrate includes a second substrate. The display panel further includes a first viewing-angle improving layer disposed between the first substrate and the second substrate. The first viewing-angle improving layer adjoins one film layer on the first substrate or the second substrate. The first viewing-angle improving layer is disposed between the first substrate and the second substrate so that the first viewing-angle improving layer can be a stacked part manufactured integratedly with other film layers of the display panel. Thus, manufacture of the first viewing-angle improving layer can overcome a size limitation of a mold in a nanoimprinting technology, effectively improving a large-viewing-angle-display effect of a large-size display panel.