Display Apparatus Wider Gate and Storage Electrodes Block Light Leakage
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Solution Overview
Problem
Conventional display apparatuses with color-filter-on-array (COA) structures face challenges in blocking uncontrolled backlighting, which can compromise image contrast due to light leakage between pixel electrodes, leading to increased manufacturing complexity and cost from the need for a separate black matrix.
Innovation Solution
The display apparatus incorporates wider gate line segments and storage electrode segments on the base substrate, which are capacitively coupled to data lines, effectively blocking uncontrolled backlighting without the need for a separate black matrix, simplifying the structure and reducing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate black matrix is formed in the opposite substrate to block uncontrolled backlighting, then light leakage between pixel electrodes is prevented and image contrast is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the light-blocking function with existing structural elements (gate line segments and storage electrode segments) by extending their widths beyond conventional dimensions. These elements simultaneously serve their original electrical functions and acquire the additional function of blocking uncontrolled backlighting, thereby eliminating the need for a separate black matrix structure.
Solution Approach 2:
The gate line segments and storage electrode segments are designed to perform multiple functions: they provide electrical connectivity for pixel control while also serving as light-blocking structures. By making these elements wider than conventional designs, they effectively block uncontrolled backlighting in the regions between pixel electrodes, thus achieving multi-functionality without adding separate components.
2Object-affected harmful factors
If a separate black matrix is formed in the opposite substrate to block uncontrolled backlighting, then image contrast is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines the light-blocking function with existing manufacturing processes for forming gate lines and storage electrodes. By extending the widths of these elements during standard fabrication steps, the light-blocking capability is achieved without requiring additional manufacturing steps or materials, thereby reducing manufacturing cost while preventing light leakage.
Solution Approach 2:
The existing conductive layers are designed to serve dual purposes: electrical functionality and optical control. This multi-functionality approach eliminates the need for separate black matrix materials and processing steps, reducing manufacturing complexity and cost while achieving effective light blocking between pixel electrodes.
3Object-affected harmful factors
If gate line segments and storage electrode segments are made wider to block uncontrolled backlighting, then light leakage is prevented and image contrast is improved, but the area occupied by these elements increases
Solution Approach 1:
The patent merges the light-blocking function with existing electrical elements by extending their widths. The gate line segments and storage electrode segments are made wider than conventional designs to overlap with the regions between adjacent pixel electrodes, thereby blocking uncontrolled backlighting in these inter-pixel regions without requiring separate light-blocking structures.
Solution Approach 2:
The increased width of gate line segments and storage electrode segments is applied specifically in regions where light blocking is needed (between pixel electrodes), while maintaining conventional dimensions in other areas. This localized modification targets the light leakage problem without unnecessarily increasing the overall area occupied by these elements throughout the entire display structure.
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 configuration ensures that image contrast is maintained by blocking light leakage between pixel electrodes, thereby eliminating the requirement for a separate black matrix, simplifying the display apparatus structure and reducing manufacturing costs.
Implementation Method 1
a storage electrode segment disposed directly on the base substrate portion and capacitively coupled to the data line segment
Data Source
AI summary
A display apparatus includes a display-controlling substrate and an opposite substrate facing the display-controlling substrate. The display-controlling substrate includes a base substrate portion and has a display area and a peripheral area surrounding the display area with pixel units being formed in the display area of the display-controlling substrate. Each pixel unit includes a gate line segment extending in a first direction and having a respective first width (W1), a data line segment, a color filter, a pixel electrode, and a storage electrode segment having a second width and extending in a direction different from that of the gate line segment. Spaces between adjacent pixel electrodes, where uncontrolled light might leak out are overlapped by one or the other of the first and second width segments where the widths of the opaque segments are wider than the overlapped space.