Display Device Polarization Pattern Aperture Ratio
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Solution Overview
Problem
Conventional liquid crystal display (LCD) devices face challenges in enhancing the arrangement conditions of switching elements, color conversion layers, and pixel electrodes, which affect the aperture ratio of pixels, leading to reduced panel brightness and inefficient light utilization.
Innovation Solution
A display device design that includes a switching element, a color conversion layer, and a polarization pattern on the same substrate, with a pixel electrode connected to the polarization pattern through a contact hole, and a planarization layer with specific grooves and contact holes to optimize the arrangement and increase the aperture ratio, along with a method of manufacturing that involves forming these layers using photolithography and etching processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the switching element, color conversion layer, and pixel electrode are arranged in a conventional configuration, then the manufacturing process is simple, but the aperture ratio is reduced and panel brightness decreases
Solution Approach 1:
The patent introduces a polarization pattern layer positioned between the color conversion layer and the pixel electrode, creating a new dimensional arrangement in the vertical stack. This additional layer enables better spatial separation and arrangement of components, improving the aperture ratio by allowing the pixel electrode to extend closer to the data line while maintaining proper functionality through the polarization pattern's intermediate position.
2Manufacturing precision
If the pixel electrode is positioned close to the data line, then the aperture ratio increases, but coupling between the pixel electrode and data line occurs
Solution Approach 1:
The polarization pattern serves as an intermediary layer between the data line and the pixel electrode. This intermediate structure physically separates the two conductive elements, preventing direct coupling while allowing the pixel electrode to maintain an extended position that maximizes the aperture ratio. The polarization pattern's dielectric properties further isolate the electric fields of adjacent conductors.
3Device complexity
If the switching element and color conversion layer are arranged without optimization, then the device complexity is low, but the light utilization efficiency is reduced
Solution Approach 1:
The patent implements a pre-arranged polarization pattern layer that is formed before the pixel electrode is deposited. This preliminary structuring of the polarization pattern allows for optimized light transmission paths to be established in advance, ensuring that light from the backlight unit passes through the color conversion layer and polarization pattern efficiently before reaching the pixel electrode, thereby improving light utilization without requiring complex post-processing adjustments.
Data Source
AI summary
A display device and a method of manufacturing the display device are capable of enhancing arrangement condition of a switching element, a color conversion layer, and a pixel electrode, and increasing an aperture ratio of a pixel. The display device includes: a first substrate; a switching element and a color conversion layer on the first substrate; a polarization pattern overlapping the color conversion layer and connected to the switching element; and a pixel electrode overlapping the polarization pattern and connected to the polarization pattern.