Display Module Recessed Optical Film Waterproofing
Solution Overview
Problem
Existing waterproof methods for handheld electronic devices, such as O-rings and insulation coatings, restrict design aesthetics and fail to effectively protect the display module's optical film from moisture, leading to uneven backlight and display quality issues.
Innovation Solution
A display module design featuring a light guide plate with a recessed structure, where the display panel is sealed using a waterproof adhesive, and an optical film is positioned within the recess to prevent moisture and foreign particles from entering, ensuring the optical film's integrity and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an O-ring is installed on the handheld electronic device to prevent moisture entry, then water resistance is improved, but design appearance is restricted
Solution Approach 1:
The waterproofing function is segmented from the external appearance. The O-ring is relocated to the internal interface between the display panel and light guide plate, separating the waterproofing component from the external aesthetic surface, thus maintaining both water resistance and design appearance.
Solution Approach 2:
The O-ring serves as an intermediary element positioned at the interface between the display panel and light guide plate. This intermediary component provides waterproofing without being visible from the external, effectively mediating between the waterproofing requirement and aesthetic design.
2Object-affected harmful factors
If insulation material is coated on the circuit board to block moisture, then moisture blockage is improved, but effective water resistance for the display module is not achieved
Solution Approach 1:
The waterproofing function is extracted from the circuit board insulation coating and relocated to the critical interface between the display panel and light guide plate. This extraction ensures that moisture blocking is implemented at the most vulnerable location where optical films are present, rather than on the circuit board.
Solution Approach 2:
The O-ring is positioned in advance at the interface between the display panel and light guide plate to prevent moisture entry before it can reach the optical films. This preliminary protective action addresses the harmful factor at its point of entry rather than attempting to block it elsewhere.
3Illumination intensity
If the optical film is located between the display panel and light guide plate, then optical function is achieved, but the optical film is vulnerable to moisture damage
Solution Approach 1:
The optical film is nested within the recessed structure formed by the display panel and light guide plate interface. The O-ring is positioned within this nested structure to provide waterproofing specifically at the location where the optical film resides, protecting it from moisture while maintaining optical functionality.
Solution Approach 2:
The O-ring acts as an intermediary waterproofing element positioned between the display panel and light guide plate, specifically protecting the optical film from moisture exposure while allowing the optical film to maintain its position for proper optical function.
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
The solution effectively seals the gaps between the light guide plate and display panel, protecting the optical film from moisture and foreign particles, thereby maintaining optimal display quality and preventing mura issues.
Implementation Method 1
The display panel is attached to the light guide plate through the waterproof adhesive-material
Data Source
AI summary
A display module is provided. The display module includes a frame, a light guide plate, a light source device, a display panel and an optical film. The light guide plate is accommodated within the frame. The light guide plate has a recess. The light source device is disposed between the frame and the light guide plate. The display panel is disposed on the recess and attached to the light guide plate to seal the recess. The optical film is located within the recess. A handheld electronic device having said display module is also provided.