Color Filter Width Adjustment for Display Misalignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As display devices increase in size, the reduced distance between pixels and narrower data lines make it difficult to form boundaries between color filters, leading to potential misalignment with light blocking layers, causing color mixture or light leakage.
Innovation Solution
A display device design where the color filter overlaps the pixel electrode and has a width greater than the distance between adjacent data lines, positioning the overlapping portion of adjacent color filters in the light blocking area to prevent misalignment and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display device size increases and pixel distance is reduced, then the display resolution and density are improved, but the alignment precision between color filter and light blocking layer deteriorates
Solution Approach 1:
The patent introduces a buffer layer as an intermediary element between the color filter and the light blocking layer. This buffer layer absorbs misalignment errors and prevents direct contact between the color filter edge and the light blocking layer, thereby eliminating color mixture and light leakage issues that occur when alignment precision deteriorates due to reduced pixel pitch.
2Measurement precision
If the data line width is reduced to increase pixel density, then the display resolution is improved, but the difficulty of forming aligned color filter boundaries increases
Solution Approach 1:
The buffer layer serves as a mediator that simplifies the manufacturing process. Instead of requiring precise alignment between the color filter and the narrow data lines, the buffer layer provides a larger, more easily formed structure that automatically prevents misalignment issues, thereby improving ease of manufacture while maintaining high pixel density.
3Stability of the object's composition
If the color filter width is increased to prevent misalignment, then the alignment stability is improved, but the distance between adjacent data lines is reduced
Solution Approach 1:
The patent segments the color filter structure into two functional parts: the main color filter area that defines the pixel color, and the extended buffer layer portion that provides alignment stability. This segmentation allows the color filter width to remain optimized for data line spacing while the buffer layer extends further to prevent misalignment, thereby resolving the contradiction between alignment stability and data line spacing.
Data Source
AI summary
A display device includes: a first substrate and a second substrate disposed facing each other; a gate line and a first data line disposed on the first substrate; a thin film transistor connected to the gate line and the first data line; a pixel electrode connected to the thin film transistor; and a color filter disposed on at least one of the first substrate and the second substrate, the color filter overlapping the pixel electrode. The color filter has a width greater than a distance between the the first data line and a second data line disposed adjacent to the first data line.