Backlight Module Clamping Arm Prevents LOCA Overflow
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Solution Overview
Problem
Traditional mounting methods for quantum dot displays using LOCA (Liquid Optically Clear Adhesive) can lead to adhesive overflow, affecting optical performance and assembly due to the adhesive's fluidity.
Innovation Solution
A backlight module design featuring a clamping arm on the light emitter's base to securely clamp the wavelength converter without adhesives, and engaging structures on the clamping arm and light guide plate to prevent adhesive overflow by directing and adhering the LOCA to these structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If LOCA (Liquid Optically Clear Adhesive) is used to mount the wavelength converter, then the mounting strength is improved, but adhesive overflow occurs affecting optical performance
Solution Approach 1:
The patent introduces an engaging structure as an intermediary component between the wavelength converter and the light guide plate. This structure includes an engaging protrusion on the wavelength converter that fits into an engaging groove on the light guide plate, creating a mechanical interlocking system that prevents adhesive overflow while maintaining mounting strength.
Solution Approach 2:
The mounting system is segmented into distinct functional components: the wavelength converter with engaging protrusion, the light guide plate with engaging groove, and the LOCA adhesive applied in controlled amounts. This segmentation allows the mechanical engaging structure to control adhesive placement and prevent overflow.
2Ease of manufacture
If adhesive is used to mount the wavelength converter, then the mounting process is simplified, but adhesive overflow occurs affecting assembly precision
Solution Approach 1:
The engaging structure serves as a mediator that guides the wavelength converter into precise alignment with the light guide plate during assembly. The engaging protrusion and groove provide self-aligning features that ensure accurate positioning while simplifying the mounting process.
Solution Approach 2:
The engaging structures are pre-formed on the wavelength converter and light guide plate before assembly. This preliminary preparation of mechanical interlocking features enables precise alignment and controlled adhesive application during the subsequent mounting process.
3Strength
If more LOCA is applied to ensure adequate bonding, then the mounting strength is improved, but adhesive overflow increases
Solution Approach 1:
The engaging structure creates localized bonding zones where LOCA is confined to specific areas between the wavelength converter and light guide plate. The engaging protrusion and groove define precise boundaries for adhesive application, ensuring adequate bonding strength while preventing overflow to surrounding areas.
Solution Approach 2:
The engaging structure acts as a mediator that controls the distribution and confinement of LOCA adhesive. By providing mechanical interlocking features, it ensures that adhesive remains localized at the bonding interface without spreading to adjacent surfaces.
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
Enhances mounting strength between the wavelength converter and light guide plate while preventing adhesive overflow, thereby improving optical performance and assembly reliability.
Implementation Method 1
a light emitter includes a particularly designed clamping arm formed on a base thereof. The clamping arm of the base can be used to clamp a wavelength converter
Implementation Method 2
when the wavelength converter is adhered to a side of a light guide plate of the backlight module by using a LOCA (Liquid Optically Clear Adhesive), the LOCA also adheres to the clamping arm that clamps the wavelength converter, so as to enhance the mounting strength
Implementation Method 3
engaging structures are respectively disposed on the clamping arm of the base and the light guide plate, so the LOCA between the wavelength converter and the light guide plate can be blocked by the clamping arm when the base of the light emitter abuts against the light guide plate, so as to prevent the LOCA from overflowing
Data Source
AI summary
A backlight module includes a light guide plate, at least one light emitter, and a wavelength converter. The light guide plate has an incident surface. The light emitter is disposed at a side of the light guide plate and corresponds in position to the incident surface. The light emitter includes a base and a light source. The base includes a clamping arm. The clamping arm substantially extends toward the light guide plate. The light source is disposed on the base. The wavelength converter is located between the light guide plate and the light source and is clamped by the clamping arm.