LCD Array Substrate Spacer Alignment via Recess Portions
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Solution Overview
Problem
During LCD device assembly, misalignment between substrates can cause spacers to be revealed, affecting pixel performance, as they are not adequately covered by the black matrix layer.
Innovation Solution
The array substrate includes spacers positioned at non-intersection points of conductive lines, which align with the recess portions of the color filter substrate, ensuring that the spacers are not exposed during assembly and maintaining proper alignment between display and light-transmitting regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If spacers are sprayed between substrates to maintain constant distance, then spacing uniformity is improved, but spacer revealing occurs due to substrate misalignment
Solution Approach 1:
The patent applies preliminary action by pre-forming recess portions in the color filter substrate at predetermined locations before assembly. These recess portions are strategically positioned to receive and conceal spacers, ensuring that even if substrate misalignment occurs during assembly, the spacers will be covered by the black matrix layer rather than being revealed, thus maintaining pixel performance
Solution Approach 2:
The patent introduces an intermediary structure - the recess portion in the color filter substrate - that acts as a mediator between the spacer and the black matrix layer. This recess portion receives the spacer and allows the black matrix layer to cover it, effectively hiding the spacer from view and preventing spacer revealing issues without requiring perfect alignment
2Reliability
If substrates are precisely aligned during assembly, then pixel performance is improved, but assembly complexity and time increase
Solution Approach 1:
The patent applies self-service by designing the recess portions to automatically guide and accommodate spacers during assembly. The recess portions are positioned and sized such that spacers naturally fall into place and are concealed, providing self-alignment and self-concealment functions that reduce the need for precise manual alignment and complex assembly procedures
Solution Approach 2:
By pre-forming the recess portions in the color filter substrate before assembly, the patent eliminates the need for complex real-time alignment adjustments during assembly. The recess portions are strategically positioned to accommodate potential misalignment, allowing for simpler and faster assembly processes while maintaining pixel performance
Data Source
AI summary
An array substrate for a liquid crystal display (LCD) device. An exemplary embodiment of an array substrate comprises a transparent substrate. A plurality of first and second conductive lines overlies the transparent substrate and cross over each other, thereby defining a plurality of display regions. At least one first spacer overlies a portion of the first or second conductive lines, wherein the first spacer is not formed over an intersection of the first and second conductive lines. A pixel electrode layer overlies the display regions, wherein the first spacer partially covers the pixel electrode layer.