Display Module Frame Bulge Design for Optical Film Wrinkle Prevention
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Solution Overview
Problem
In vehicle-mounted display modules, the light guide plate can raise due to assembly and transportation, causing the optical film to wrinkle and affect the display effect, as existing elastic liners fail to maintain proper spacing and allow for thermal expansion.
Innovation Solution
A display module design featuring a light guide plate with a first and second accommodating cavity, where the optical film layer is positioned with a second spacing larger than the first, preventing contact with the frame and allowing for thermal movement without wrinkling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the light guide plate is held with an elastic liner rubber through interference fit, then the light guide plate is fixed and stable, but the optical film may contact the frame and wrinkle due to thermal expansion and transportation vibrations
Solution Approach 1:
The frame is segmented into a base part and a bulge part, creating separate functional zones: the base part provides structural support while the bulge part creates an accommodating cavity that isolates the optical film from direct contact with the frame, preventing wrinkles while maintaining overall stability
Solution Approach 2:
The bulge acts as an intermediary structure between the frame and the optical film. It creates a buffer zone with controlled spacing, allowing thermal expansion and vibration without direct contact between the optical film and the frame, thus preventing wrinkles
2Volume of moving object
If the optical film is positioned close to the frame for compact design, then device size is reduced, but the optical film contacts the frame during thermal expansion causing display defects
Solution Approach 1:
The frame structure has different local qualities: the base part provides structural support while the bulge part provides a protective buffer zone. This local differentiation allows compact overall design while creating a protected zone for the optical film that prevents thermal expansion damage
3Manufacturing precision
If the light guide plate is firmly fixed to prevent movement, then positioning accuracy is improved, but the optical film cannot accommodate thermal expansion and wrinkles
Solution Approach 1:
The structure transitions from a static firm fix to a dynamic system where the bulge provides a compliant buffer zone. The optical film can move slightly within the accommodating cavity to accommodate thermal expansion while the base part maintains overall positioning accuracy
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
Prevents optical film wrinkling and maintains display quality by ensuring the optical film does not contact the frame, even under thermal expansion, thus enhancing product competitiveness.
Implementation Method 1
a light guide plate disposed on a side of the back plate
Data Source
AI summary
A display module and a display device are described. The display module includes a back plate; a light guide plate disposed on a side of the back plate; a frame including a first base part and a first bulge extending inward, where the first bulge has a first bottom surface, a first end surface, and a second bottom surface jointed in sequence, an end part of the light guide plate is received in a first accommodating cavity and has a first spacing relative to the first bottom surface; an optical film layer disposed on the side of the light guide plate facing away from the back plate, and an end part thereof is located in a second accommodating cavity and has a second spacing relative to the second bottom surface; the first spacing is smaller than the second spacing.