Display Substrate Light-Blocking Pattern for LCD Corner Leakage
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Solution Overview
Problem
Liquid crystal display (LCD) panels experience light-leakage issues at the corners where red, green, blue, and white color filters adjoin, leading to inefficiencies in light transmission and display quality.
Innovation Solution
A display substrate design incorporating a light-blocking pattern on the shielding electrode, which includes an opaque metal layer, is implemented to overlap the data line adjacent to the corners of the pixel electrodes, effectively reducing light-leakage by forming a wider second portion of the light-blocking pattern at the junctions of the pixel electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If color filters are disposed on the array substrate to enable color display, then the display can show red, green, blue and white colors, but light-leakage occurs at the corners where color filters adjoin
Solution Approach 1:
The invention divides the shielding function into multiple components: a first light-blocking pattern on the array substrate and a second light-blocking pattern on the opposing substrate. This segmentation allows each component to address specific leakage areas, effectively blocking light at color filter corners while maintaining color display capability
Solution Approach 2:
The invention introduces light-blocking patterns as intermediary structures between the color filters and the liquid crystal layer. These patterns act as mediators that selectively block harmful light leakage at color filter junctions while allowing necessary light transmission for display functionality
2Ease of manufacture
If the light-blocking pattern is formed with the same width as the shielding electrode, then the manufacturing process is simplified, but light-leakage may not be sufficiently blocked at corner areas
Solution Approach 1:
The invention applies different width characteristics to different portions of the light-blocking pattern. The second light-blocking pattern on the opposing substrate has a greater width than the first light-blocking pattern on the array substrate. This local differentiation ensures sufficient light leakage blocking at corner areas while maintaining overall 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
The light-blocking pattern significantly decreases light-leakage between adjacent pixel electrodes, enhancing the display's light transmission efficiency and overall image quality by blocking unwanted light at the corners of the color filter junctions.
Implementation Method 1
a light-blocking pattern disposed on the shielding electrode and adjacent to a corner of the pixel electrode
Data Source
AI summary
A display substrate includes a first switching element electrically connected to a gate line extending in a first direction and a data line extending in a second direction crossing the first direction, an organic layer disposed on the first switching element, a shielding electrode disposed on the organic layer and overlapping the data line, a pixel electrode disposed on the same layer as the shielding electrode and a light-blocking pattern disposed on the shielding electrode and adjacent to a corner of the pixel electrode