Display Panel Spacer and Data Line Routing for Cell Gap Uniformity
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Solution Overview
Problem
In liquid crystal display panels, ensuring uniformity of the cell gap, especially in small-sized pixels, is challenging due to the difficulty in arranging spacers effectively, which affects the stability and resolution of the display device.
Innovation Solution
The display panel design includes a first substrate with spacers arranged on a base substrate and a second substrate with intersecting gate and data lines, where the data lines are bent to accommodate the spacers, providing sufficient arrangement space and preventing spacer abutment with the data lines, thus maintaining cell gap uniformity and supporting the second substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel size is reduced to improve resolution, then the display resolution is improved, but the arrangement space for spacers is reduced making it difficult to maintain uniform cell gap
Solution Approach 1:
The data line is designed with a bending portion that extends in a direction different from the main body portion, utilizing two-dimensional space more effectively. This allows the data line to route around the spacer in the row direction while maintaining its electrical connection function, thereby accommodating the spacer in small pixel designs without compromising resolution.
Solution Approach 2:
The data line is divided into distinct segments: a body portion extending in the column direction and a bending portion extending in the row direction. This segmentation allows the data line to be routed around the spacer obstacle, providing sufficient arrangement space for the spacer while maintaining the overall compact pixel structure for high resolution.
2Manufacturing precision
If the spacer is arranged to maintain uniform cell gap, then the cell gap uniformity is improved, but the data line arrangement is constrained requiring bending
Solution Approach 1:
The bending portion of the data line extends in the row direction (different dimension from the column direction main body), allowing the data line to route around the spacer. This dimensional change enables the data line to accommodate the spacer's position while maintaining electrical connectivity, and the spacer can be positioned to ensure uniform cell gap without excessive complexity.
Solution Approach 2:
The data line incorporates a bending portion with a curved or angled transition rather than a sharp corner, allowing smooth routing around the spacer. This curvature design reduces stress concentration and simplifies manufacturing while achieving the necessary spatial arrangement for both uniform cell gap and data line functionality.
3Adaptability or versatility
If the data line is bent to accommodate the spacer, then the spacer arrangement flexibility is improved, but the manufacturing process complexity increases
Solution Approach 1:
The data line is segmented into a body portion and a bending portion, each serving a specific function. The body portion maintains vertical connectivity while the bending portion provides lateral routing around the spacer. This segmentation simplifies the manufacturing process by allowing separate optimization of each segment's geometry and positioning.
Solution Approach 2:
The bending portion of the data line is pre-designed and pre-positioned during the manufacturing process to accommodate the spacer from the outset. This preliminary arrangement of the data line's bending section ensures that the spacer can be placed in its optimal position for uniform cell gap without requiring complex post-processing adjustments.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a first substrate and a second substrate arranged oppositely. The first substrate includes a spacer. The second substrate includes: a second base substrate; a data line including, a body portion and a bending portion; and a sub-pixel including a light transmission region. An orthographic projection of the spacer on the second base substrate is adjacent to that of the light transmission region on the second base substrate, the orthographic projection of the spacer on the second base substrate is spaced apart from that of the data line on the second base substrate; an orthographic projection of the bending portion on the second base substrate is bent toward a direction away from the orthographic projection of the spacer on the second base substrate with respect to an orthographic projection of the body portion on the second base substrate.