Flexible Circuit Module for Touch Display Height Compensation
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Solution Overview
Problem
The assembly of touch display devices faces structural instability and light leakage due to height differences between the touch panel and the exterior case, caused by manufacturing process limitations in injection molding, leading to inconsistent thickness and display quality issues.
Innovation Solution
A flexible circuit module is introduced, featuring a connecting part, extension part, and bending part that can be adjusted to match the height difference between the touch panel and the display panel, ensuring a stable assembly and eliminating light leakage by using a glue layer only on the touch area and a gap without glue on the connection area, with the flexible circuit module's design allowing for better alignment and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the thickness of the display panel, touch panel, and backlight module is reduced to achieve thinner portable devices, then the portability is improved, but the height difference between the touch panel and exterior case increases due to manufacturing process limitations
Solution Approach 1:
The patent divides the connection area into two distinct zones: a touch area with glue layer for bonding, and a connection area without glue layer to accommodate the flexible circuit module. This segmentation allows independent optimization of bonding strength and circuit connection, resolving the height inconsistency issue while maintaining thin profile.
Solution Approach 2:
The flexible circuit module acts as an intermediary element that bridges the height difference between the touch panel and exterior case. By placing this flexible connector in the gap area, the patent accommodates thickness variations without compromising the overall assembly stability or display quality.
2Length of moving object
If the thickness of the exterior case is reduced to match the thinner touch display module, then the overall device thickness is reduced, but the structural stability deteriorates due to injection molding process limitations
Solution Approach 1:
The connection area is segmented into touch area and connection area, allowing the exterior case to be designed with optimized thickness in different regions. The connection area can be slightly thicker to accommodate the flexible circuit module, while the display area remains thin for portability.
Solution Approach 2:
The patent applies different structural qualities to different areas: the touch area uses glue layer for strong bonding with thin profile, while the connection area uses the flexible circuit module to provide structural support and accommodate height differences, allowing the exterior case to maintain both thinness and stability.
3Ease of manufacture
If the height difference between touch panel and exterior case is not compensated, then the assembly process is simplified, but light leakage occurs and display quality is degraded
Solution Approach 1:
By segmenting the connection area into touch area and connection area, the patent enables a simple assembly process where the flexible circuit module is placed in the pre-defined gap area. This segmentation ensures that the touch area maintains proper bonding for display quality, while the connection area accommodates the flexible module to prevent light leakage.
Solution Approach 2:
The flexible circuit module serves as an intermediary that fills the gap between the touch panel and exterior case, preventing light leakage while maintaining the simplicity of the assembly process. The module's flexible nature allows it to adapt to height differences without requiring complex adjustment mechanisms.
Data Source
AI summary
A touch display device is provided. A bottom surface of a substrate of a touch panel has a touch area and a connection area. A set of touch electrodes are disposed on the touch area, and a connecting pad is disposed on the connection area to connect the set of touch electrodes. A glue layer is disposed between the surface of the display panel and the touch area. A gap is formed between the surface of a display panel and the connection area. A connecting part of a flexible circuit module is connected to the connecting pad. A bending part has a first end connected to the connecting part and a second end connected to an extension part. The extension part extends out of the gap from the second end. A portion of the extension part, the connecting part, and the bending part are located within the gap.