Touch Display Panel Substrate Reduction for Optical Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional touch display panels require a large number of substrates, which reduces optical efficiency, increases manufacturing costs, and complicates the manufacturing process.
Innovation Solution
A touch display panel design using a reduced number of substrates, where the display unit includes a first base substrate with pixel electrodes and a common electrode, and the touch unit includes a color filter layer and electrodes on a second base substrate, with a third substrate for touch detection, all combined to enhance optical efficiency and simplify the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional touch display panel uses at least five or more substrates (first display substrate, second display substrate, color filter substrate, first touch substrate, and second touch substrate), then the touch detection and display functions are achieved, but the optical efficiency is reduced and the manufacturing cost increases
Solution Approach 1:
The patent combines the color filter substrate and the first touch substrate into a single integrated substrate. The color filter layer is formed on the first touch substrate, which already contains the first touch electrode pattern. This merging eliminates the need for a separate color filter substrate while maintaining both color display and touch detection functions, thereby improving optical efficiency by reducing the number of substrate layers.
Solution Approach 2:
The first touch substrate serves multiple functions: it acts as both the touch sensing substrate (with first touch electrode) and the base substrate for the color filter layer. This multi-functional design allows a single substrate to fulfill both touch detection and color filtering roles, reducing the total number of substrates from five or more to three substrates.
2Reliability
If a conventional touch display panel uses at least five or more substrates, then the touch detection and display functions are achieved, but the manufacturing cost increases
Solution Approach 1:
The patent merges the color filter substrate and first touch substrate into one integrated substrate, reducing the total substrate count from five or more to three. This consolidation directly reduces manufacturing costs by decreasing material purchases, simplifying the lamination process, and reducing the number of alignment and bonding operations required.
Solution Approach 2:
The first touch substrate is designed to serve dual purposes: touch sensing and color filter support. This multi-functionality eliminates the need for a separate color filter substrate, thereby reducing material costs and simplifying the manufacturing process while maintaining both touch detection and color display capabilities.
3Reliability
If a conventional touch display panel uses at least five or more substrates, then the touch detection and display functions are achieved, but the manufacturing process becomes complicated
Solution Approach 1:
The patent integrates the color filter layer formation process into the first touch substrate manufacturing process. The color filter layer is formed directly on the first touch substrate that already contains the first touch electrode pattern, eliminating the need for separate lamination and alignment processes between color filter substrate and touch substrate, thereby simplifying the manufacturing process.
Solution Approach 2:
The first touch substrate is designed to fulfill multiple functions (touch sensing and color filter support), which simplifies the overall device structure from five or more separate substrates to three substrates. This reduction in substrate number directly simplifies the manufacturing process by reducing the number of lamination, alignment, and bonding steps required.
Data Source
AI summary
A touch display panel may include a display unit and a touch unit. The display unit may include a first base substrate having a plurality of pixel electrodes, a second base substrate including a common electrode disposed on a first face of the second base substrate, and an electro optical layer disposed between the pixel electrodes and the common electrode. The first face faces the first base substrate. The touch unit includes a color filter layer including a plurality of color filters and a first electrode part including first electrodes disposed on a second face of the second base substrate, and a third base substrate including a second electrode part extended along a direction crossing the first electrodes. The first electrodes may be disposed on a boundary area of the color filters having different colors from each other, so that mixing of the colors is prevented.