Touch Display Panel Wiring Segments for Sensing Accuracy
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Solution Overview
Problem
Conventional touch display panels face issues with high material costs and complex manufacturing processes due to the need for additional wirings, which occupy significant space and reduce sensing accuracy and linearity.
Innovation Solution
A high-accuracy flat touch display panel structure is designed with wiring segments arranged on a thin film transistor and wiring layer, eliminating the need for wirings on the sensing electrode layer, thereby reducing the gap distance between sensing touch patterns and enhancing sensing linearity and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wirings are arranged on the sensing electrode layer to connect touch patterns, then the touch panel can detect touch coordinates, but the wirings occupy significant space creating dead areas that reduce sensing accuracy and linearity
Solution Approach 1:
The patent transitions from planar wiring arrangement to three-dimensional stacked wiring arrangement. Multiple wiring layers are positioned at different heights (Z-axis) to connect touch patterns, allowing wirings to route above or below the sensing electrode layer rather than occupying the same plane. This vertical dimensionality change eliminates dead areas on the sensing layer while maintaining electrical connectivity.
Solution Approach 2:
The wiring system is divided into multiple independent wiring layers, each handling specific connection functions. The first wiring layer connects touch patterns in the sensing electrode layer, while subsequent wiring layers provide additional routing paths and connections to control electrodes. This segmentation allows each layer to be optimized independently, reducing interference and dead areas.
2Reliability
If additional wirings are added to the sensing electrode layer to improve touch detection, then touch functionality is enhanced, but manufacturing cost and process complexity increase
Solution Approach 1:
The control electrode layer serves multiple functions: it acts as a shielding layer to reduce external interference, provides additional touch detection capability through control electrodes, and offers an alternative routing path for wirings. This multi-functionality enhances touch detection reliability without requiring additional dedicated components, thereby simplifying manufacturing.
Solution Approach 2:
The patent merges the shielding function and touch detection function into a single control electrode layer. The control electrodes are integrated with the shielding structure, eliminating the need for separate shielding layers and reducing manufacturing steps. This consolidation maintains reliability while improving ease of manufacture.
3Adaptability or versatility
If a conventional touch panel structure with separate touch panel and display unit is used, then touch functionality is provided, but additional weight and thickness are added to the display panel
Solution Approach 1:
The patent integrates the touch panel structure directly within the display panel structure by incorporating the sensing electrode layer and control electrode layer into the same substrate system. The sensing and control electrodes are formed on the same lower substrate along with the thin film transistor layer, eliminating the need for a separate bonded touch panel assembly. This merging reduces both weight and thickness while maintaining full touch functionality.
Solution Approach 2:
The touch detection electrodes (sensing and control electrodes) are nested within the display panel's existing layer structure. The electrodes are positioned between the lower substrate and the liquid crystal layer, utilizing the available space within the display panel's thickness rather than adding external layers. This nested arrangement provides touch functionality without increasing overall panel dimensions.
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 design reduces manufacturing costs, simplifies the process, and increases the yield rate while improving sensing accuracy and linearity by eliminating the need for additional wirings on the sensing electrode layer.
Implementation Method 1
a liquid crystal layer configured between the upper substrate and the lower substrate
Implementation Method 2
The capacitive touch panel is provided to convert the capacitance change caused by the arranged transparent electrodes combined with the static electricity with respect to human body into current or voltage, so as to detect the touch coordinates
Implementation Method 3
a sensing electrode layer having a plurality of sensing conductor lines for sensing an approaching external object
Data Source
AI summary
A high-accuracy flat touch display panel structure includes an upper substrate, a lower substrate, a liquid crystal layer configured between the upper and lower substrates, a thin film transistor and wiring layer, and a sensing electrode layer. The thin film transistor and wiring layer is disposed at one side of the lower substrate facing the liquid crystal layer, and includes a plurality of gate lines, a plurality of source lines, and a plurality of wirings. The sensing electrode layer is disposed at one side of the thin film transistor and wiring layer facing the liquid crystal layer, and has a plurality of sensing conductor lines. The plurality of sensing conductor lines are disposed corresponding to positions of the plurality of gate lines and the plurality of source lines.