Flexible Substrate Integration for Display Panel PCB Connection
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Solution Overview
Problem
Conventional display apparatus manufacturing processes are complex and costly due to the need for additional steps to connect flexible flat cables or printed circuits between printed circuit boards and the display panel, increasing manufacturing time and expense.
Innovation Solution
A display apparatus design that uses a first flexible substrate to connect spaced-apart printed circuit boards to each other and to the display panel via thermo-compression bonding, eliminating the need for flexible flat cables or printed circuits, and potentially including dummy lines for added rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional flexible flat cables or printed circuits are used to connect printed circuit boards to the display panel, then electrical connection is achieved, but manufacturing complexity and cost increase due to additional connection steps
Solution Approach 1:
The patent merges the functions of the flexible substrate and the connection cable into a single integrated flexible substrate structure. The flexible substrate directly provides both structural support and electrical connection pathways, eliminating the need for separate flexible flat cables or printed circuits. This integration simplifies the manufacturing process by reducing the number of assembly steps while maintaining reliable electrical connections between the printed circuit boards and the display panel.
2Reliability
If additional connection steps are used to connect flexible flat cables or printed circuits, then electrical connectivity is ensured, but manufacturing time increases
Solution Approach 1:
The flexible substrate integrates both mechanical support and electrical connection functions into a single component. The connection lines are directly formed on the flexible substrate during its manufacturing process, eliminating subsequent assembly steps for attaching separate cables. This reduces manufacturing time and increases productivity while ensuring reliable electrical connectivity through the integrated design.
Solution Approach 2:
The flexible substrate is pre-manufactured with the connection lines already formed on its surface before being assembled into the display device. This preliminary formation of electrical pathways during substrate manufacturing eliminates the need for time-consuming field assembly steps, thereby improving manufacturing efficiency without compromising connection reliability.
3Reliability
If conventional connection methods are used, then electrical connection is achieved, but manufacturing cost increases due to additional materials and steps
Solution Approach 1:
The patent eliminates the need for separate flexible flat cables or printed circuits by integrating their connection function directly into the flexible substrate. This reduces material costs by eliminating redundant components and lowers manufacturing costs by reducing the number of assembly operations required. The integrated design maintains connection reliability while achieving cost efficiency through component consolidation.
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
Simplifies the manufacturing process, reduces manufacturing time and cost by eliminating the need for additional connection steps and enhancing the reliability of the connection between printed circuit boards, while supporting the flexible substrate with the display panel.
Implementation Method 1
The first flexible substrate electrically connects the first printed circuit board to the second printed circuit board
Implementation Method 2
attaching a first flexible substrate to the display panel by thermo-compression bonding
Data Source
AI summary
A display apparatus includes a display panel, a driver, a controller and a first flexible substrate. The display panel includes first and second substrates facing each other. The first substrate includes a switching element connected to a pixel electrode. The driver provides a driving signal to the display panel. The controller provides a control signal to the driver. The controller includes first and second printed circuit boards spaced apart from each other. The first flexible substrate electrically connects the first and second printed circuit boards to each other. The first flexible substrate defines a first contact portion at which the first flexible substrate is connected to the first printed circuit board, a second contact portion at which the first flexible substrate is connected to the second printed circuit board, and an overlap portion overlapping the display panel and at which the first flexible substrate is attached to the display panel.