Touch Screen Display Conductive Pattern Signal Boosting
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Solution Overview
Problem
Conventional touch screen display devices face inefficiencies in process time and cost due to separate production of touch sensors and display devices, and capacitive touch sensors experience signal delay, leading to reduced touch sensitivity.
Innovation Solution
A touch screen display device is designed with a first touch electrode receiving a touch driving signal and a second touch electrode positioned apart, along with a conductive pattern that overlaps with the first electrode to boost the touch driving signal through capacitance, improving sensitivity by reflecting voltage variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a capacitive touch sensor is configured with a first touch electrode receiving a touch driving signal and a second touch electrode outputting a change in capacitance, then multi-touch detection capability is achieved, but signal delay occurs in the touch driving signal, leading to lowered touch sensitivity
Solution Approach 1:
A conductive pattern is introduced as an intermediary element positioned between the first touch electrode and the second touch electrode. This conductive pattern receives a boosted version of the touch driving signal and couples it to the second touch electrode, thereby mediating the signal transmission and reducing the delay that would otherwise occur in the direct capacitive coupling path. The intermediary conductive pattern effectively bridges the gap and improves signal response time.
Solution Approach 2:
The voltage of the touch driving signal is changed by introducing a conductive pattern that receives a boosted signal. By modifying the voltage parameter of the driving signal through the conductive pattern, the signal strength and response time are improved, thereby enhancing touch sensitivity while maintaining multi-touch detection capability.
2Ease of manufacture
If the touch screen display device is manufactured by separately producing the display device and touch sensor and then attaching the touch sensor to the display device, then functional separation is achieved, but process time and process cost increase
Solution Approach 1:
The touch sensor components (first touch electrode, second touch electrode, and conductive pattern) are merged with the display device structure. The conductive pattern is integrated into the display device's conductive layer structure, and the touch electrodes are formed as part of the same manufacturing process. This merging eliminates the need for separate production and attachment steps, thereby reducing process time and cost while maintaining functional separation between display and touch sensing functions.
3Ease of manufacture
If the touch screen display device is manufactured by separately producing the display device and touch sensor and then attaching the touch sensor to the display device, then functional separation is achieved, but manufacturing cost increases
Solution Approach 1:
The touch sensor components are merged with the display device structure, sharing common manufacturing processes and materials. The conductive pattern is integrated into the display device's conductive layer structure, and the touch electrodes are formed using the same transparent conductive material deposition processes. This merging reduces the number of separate manufacturing steps and material requirements, thereby lowering manufacturing cost while maintaining functional separation.
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
The boosting of the touch driving signal enhances touch sensitivity by reducing signal delay, thereby improving the detection accuracy and efficiency of the touch screen display device.
Implementation Method 1
The touch driving signal may be boosted by reflecting a variation in the voltage of the conductive pattern through capacitance formed between the first touch electrode and the conductive pattern.
Data Source
AI summary
A touch screen display device includes a first touch electrode, a second touch electrode and a conductive pattern. The first touch electrode receives a touch driving signal. The second touch electrode is positioned so as to be spaced apart from the first touch electrode. The conductive pattern is positioned so as to overlap with the first touch electrode, and receives a boost signal for boosting the touch driving signal. Accordingly, the touch driving signal is boosted, thereby improving touch sensitivity.