Array Substrate Touch Wiring Layering for Aperture Ratio
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Solution Overview
Problem
The aperture ratio of array substrates in liquid crystal displays is low due to touch wiring and data lines occupying significant space, which reduces light efficiency.
Innovation Solution
The array substrate design includes a light shielding layer with a second touch wiring positioned below the data line in a transparent region, coupled through holes, and made from materials like molybdenum or copper, to minimize space occupation and improve light passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If touch wiring and data lines are formed in the same layer by single photomask process, then manufacturing complexity is reduced, but aperture ratio decreases due to large space occupation
Solution Approach 1:
The patent applies dimensional change by moving the second touch wiring from the same layer as data lines to a different layer (below the data line). This layer separation allows both the touch wiring and data lines to coexist without occupying the same space, thereby improving aperture ratio while maintaining the manufacturing simplicity of single photomask process formation.
Solution Approach 2:
The patent implements nesting by positioning the second touch wiring within the space occupied by the data line structure. Specifically, the second touch wiring is formed below the data line, allowing the data line to effectively 'contain' or overlay the touch wiring path, thus reducing overall space occupation while maintaining both functions.
2Ease of operation
If touch wiring occupies large aperture region, then touch functionality is achieved, but light transmission efficiency decreases
Solution Approach 1:
By relocating the second touch wiring to a lower layer beneath the data line, the patent enables touch functionality to be maintained while significantly reducing the wiring's presence in the light transmission path. This dimensional repositioning allows light to pass through the aperture region with minimal obstruction from the touch wiring.
Data Source
AI summary
An array substrate and a display panel are disclosed, the array substrate includes a substrate, a light shielding layer, an insulation layer, and a metal layer. The array substrate has a first region being transparent and a second region being opaque. The metal layer includes a data line and a first touch wiring. The light shielding layer includes a second touch wiring coupled with the first touch wiring. At least one portion of the second touch wiring is disposed below a portion of the data line close to the first region.