Touch Panel Spacer for Display Substrate Stress Relief
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Solution Overview
Problem
Conventional liquid crystal display modules with touch panels face reliability issues due to low bending strength in non-overlapping regions, leading to cracking when subjected to impact, especially as thinner glass substrates increase the likelihood of stress-induced damage.
Innovation Solution
A display device with a touch panel is designed to include a spacer between the non-overlapping and overlapping regions of the substrates, secured to the touch panel with adhesive tape, which prevents bending and stress on the TFT substrate, thereby enhancing the module's reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the glass substrates are made thinner to reduce module thickness, then the overall device thickness is reduced, but the bending strength decreases and cracking becomes more likely under impact
Solution Approach 1:
The spacer is positioned in advance at the non-overlapping region of the TFT substrate to provide protective support before impact occurs. This preemptive structural reinforcement prevents bending and cracking by distributing impact forces, allowing the use of thinner glass substrates without compromising strength.
2Adaptability or versatility
If the TFT substrate has a non-overlapping region to accommodate driver circuits and FPC connections, then device functionality is enabled, but the bending strength in that region becomes low and cracking occurs under impact
Solution Approach 1:
The spacer is specifically positioned only at the non-overlapping region of the TFT substrate where the driver circuit and FPC connection are located. This localized reinforcement provides targeted structural support to the weak area without affecting other regions, enabling both functionality and reliability.
3Strength
If a support member is provided to reinforce the non-overlapping region, then bending strength is improved, but the device complexity and number of components increase
Solution Approach 1:
The spacer serves multiple functions simultaneously: it provides structural reinforcement to prevent bending, acts as a positioning element for the touch panel, and protects the non-overlapping region from impact. This multi-functionality reduces the need for additional separate support components.
Solution Approach 2:
The spacer integrates the support function directly into the existing substrate assembly structure. By combining the reinforcement function with the existing layering arrangement, the design avoids adding separate complex support mechanisms while still achieving the desired strength improvement.
Data Source
AI summary
The display device with a touch panel according to the present invention has high reliability and is a display device with a touch panel having a display panel and a touch panel placed on the front surface of the display panel, wherein the display panel has a first substrate and a second substrate provided so as to be layered on the first substrate, the first substrate has a non-overlapping region that does not overlap the second substrate, and the touch panel is a liquid crystal display device with a touch panel secured on the second substrate, the touch panel has an overlapping region that overlaps the non-overlapping region of the first substrate, and a spacer is secured to the touch panel between the non-overlapping region of the first substrate and the overlapping region of the touch panel.