Flexible Printed Circuit Tail for Display Testing
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Solution Overview
Problem
The existing display devices face inefficiencies in testing processes due to the difficulty in bending and positioning the flexible printed circuit film for touch, which increases test time and reduces efficiency when disconnecting it from the printed circuit board for testing purposes.
Innovation Solution
The display device incorporates a flexible printed circuit film for touch with a tail portion that includes multiple bending portions, allowing it to be positioned on both the front and rear surfaces of the display panel, enabling easier connection to the printed circuit board without the need for disconnection during testing, thus simplifying the testing process and reducing defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible printed circuit film for touch is disconnected from the printed circuit board for testing, then the test can be performed, but the test time increases and test efficiency decreases
Solution Approach 1:
The flexible printed circuit film for touch is pre-configured with a tail portion that can be positioned on the front surface of the display panel, allowing test connections to be established before final assembly, thereby enabling testing without disconnection and reducing test time
2Reliability
If the flexible printed circuit film for touch is disconnected from the printed circuit board for testing, then the test can be performed, but test efficiency is reduced
Solution Approach 1:
The tail portion of the flexible printed circuit film for touch is pre-positioned on the front surface of the display panel, allowing test devices to connect directly during assembly without requiring disconnection and reconnection operations, thereby maintaining test efficiency
3Stability of the object's composition
If the flexible printed circuit film for touch is connected to the printed circuit board, then the connection is stable, but it is difficult to bend and position during assembly
Solution Approach 1:
The flexible printed circuit film for touch is divided into a main portion connected to the printed circuit board and a separate tail portion that can be independently positioned on the front surface of the display panel, allowing the tail portion to be easily bent and positioned without affecting the stable connection of the main portion
Solution Approach 2:
The tail portion of the flexible printed circuit film for touch extends to the front surface of the display panel, utilizing the third dimension (depth/height) to create a spatial separation between the connection point on the printed circuit board and the positioning point on the display panel, thereby facilitating easier bending and positioning while maintaining connection stability
Data Source
AI summary
A display device including a display panel configured to display an image and sense a touch, a first flexible printed circuit film bonded to one edge of the display panel, a second flexible printed circuit film bonded to another edge of the display panel, and a printed circuit board to which the first flexible printed circuit film and the second flexible printed circuit film are bonded or connected, in which the second flexible printed circuit film includes a main portion and a tail portion extending from the main portion, and the tail portion includes a first portion extending from the main portion in a first direction and a second portion extending from the first portion in a second direction different from the first direction.