Display Device Light-Shielding Film Terminal Visibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In existing display devices, the black matrix obstructs visual confirmation of the terminal connection between the flexible print substrate and the TFT substrate, making quality control and reliability assessment difficult.
Innovation Solution
A light-shielding film with strategically placed openings is used between the substrates to allow visual confirmation of the terminal connection, and translucent wiring is employed to avoid obstructing the connection area, enabling better visibility of the connection between the terminal and the driving substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a black matrix is arranged in the non-display area to shield light, then light leakage is prevented, but the terminal connection quality cannot be visually confirmed
Solution Approach 1:
The black matrix is segmented by introducing a light-shielding film with a through-hole that extends from the first substrate to the second substrate. This segmentation creates a localized opening in the otherwise continuous black matrix structure, allowing visual access to the terminal connection area while maintaining light shielding in other regions.
Solution Approach 2:
A portion of the black matrix is extracted or removed by forming a through-hole in the light-shielding film. This extracted region creates a viewing window that exposes the terminal connection between the flexible print substrate and the TFT substrate, enabling quality confirmation without removing the entire black matrix.
2Reliability
If the terminal is connected through an anisotropic conductive film, then electrical connection is achieved, but the connection quality becomes difficult to detect
Solution Approach 1:
The light-shielding film with a through-hole acts as an intermediary structure that allows optical detection of the electrical connection. The through-hole provides a viewing path through the anisotropic conductive film assembly, enabling visual confirmation of the terminal connection quality while the anisotropic conductive film maintains its electrical connection function.
3Adaptability or versatility
If wiring is provided in the non-display area for circuit connection, then electrical functionality is enabled, but visibility of the connection area is obstructed
Solution Approach 1:
The light-shielding film is designed with a through-hole at a specific location that corresponds to the terminal connection area. This creates a localized opening that provides visibility exactly where needed for connection detection, while the rest of the black matrix remains intact to perform its light shielding function and accommodate wiring in other areas.
Data Source
AI summary
A display device includes a first substrate on which a thin film transistor is formed and which is divided into a display area and a non-display area outside thereof, a second substrate arranged to face an upper surface of the first substrate, a light-shielding film provided in an area between the first substrate and the second substrate, and a circuit provided on an upper surface of the second substrate and in an area facing the display area. The second substrate includes a terminal part of the circuit, which is provided on the upper surface of the second substrate and in an area facing the non-display area. The terminal part is connected with a circuit driving substrate, which drives the circuit through an anisotropic conductive film covering the terminal part. The light-shielding film is provided to avoid at least part of an area facing the terminal part.