In-Cell Touch Display Panel Aperture Ratio Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In-cell touch panels face a decrease in aperture ratio due to touch electrodes being integrated within the light-transmissive region, affecting display performance.
Innovation Solution
The touch display panel design places first and second touch electrode lines within a non-display region, with sub-pixels arranged between these lines, allowing for electrical connections without obstructing the light-transmissive area, and uses a single patterning process for electrode formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch electrodes are integrated into the light-transmissive region of the display panel, then touch functionality is achieved, but the aperture ratio is decreased
Solution Approach 1:
The touch electrode lines are extracted from the light-transmissive display region and relocated to the non-display region. Specifically, the first touch electrode lines are positioned between adjacent gate lines and the second touch electrode lines are positioned between adjacent data lines, all within the non-display region. This extraction eliminates the obstruction of light-transmissive area while preserving touch functionality through the electrode lines' ability to detect touch inputs.
Solution Approach 2:
The patent utilizes the non-display region dimension to accommodate touch electrode lines, effectively moving the touch sensing function from the two-dimensional display area to the peripheral non-display area. This dimensional relocation allows the aperture ratio to be maximized while touch functionality is maintained through the electrode lines extending into the non-display region where they can still detect touch events.
2Measurement precision
If touch electrode lines are placed in the light-transmissive region to enable touch detection, then touch sensitivity is improved, but display performance is degraded due to reduced aperture ratio
Solution Approach 1:
The touch electrode lines are extracted from the light-transmissive display region and repositioned in the non-display region. The first touch electrode lines are arranged between adjacent gate lines and the second touch electrode lines between adjacent data lines, both within the non-display region. This extraction maintains touch detection capability while eliminating the negative impact on display brightness and aperture ratio.
3Adaptability or versatility
If touch electrodes are integrated within the array substrate, then in-cell touch functionality is achieved, but manufacturing complexity increases due to additional patterning steps
Solution Approach 1:
The patent merges the formation of touch electrode lines with the existing gate line and data line patterning processes. By positioning the first touch electrode lines between adjacent gate lines and the second touch electrode lines between adjacent data lines within the non-display region, the touch electrode lines can be formed using the same patterning steps as the display circuit lines, thereby integrating touch functionality without adding significant manufacturing complexity.
Data Source
AI summary
A touch display panel, a manufacturing method thereof and a method of detecting a touch for the same are disclosed. The touch display panel includes a first substrate (01) and a second substrate (02). The first substrate (01) includes, within its non-display region, a plurality of gate lines (10) parallel to each other, a plurality of data lines (20) parallel to each other, a plurality of first touch electrode lines (30) parallel to the gate lines (10), and a plurality of second touch electrode lines (40) parallel to the data lines (20). The first substrate (01) further includes first touch electrodes (50) electrically connected to the first touch electrode lines (30) and second touch electrodes (60) electrically connected to the second touch electrode lines (40). Between two adjacent data lines (20), there are two sub-pixels arranged in the same row on the first substrate (01). A second touch electrode line (40) is located between the two sub-pixels. A pair of gate lines (10) are located between any two adjacent rows of sub-pixels on the first substrate (01), and a first touch electrode lines (30) is located between the pair of the gate lines (10). Since the first touch electrode line (30) and the second touch electrode line (40) are disposed within the light-proof non-display region, their impact on the aperture ratio can be avoided.