Backlight Module Quantum Bar Latching Mechanism
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Solution Overview
Problem
Existing liquid crystal display (LCD) backlight modules using quantum dots florescent powder face high costs and fragility issues, particularly in large-size displays, due to the need for extensive and uniform coating of quantum dots material and the complexity of manufacturing quantum dots florescent powder glass tubes, which limits flexibility and universality.
Innovation Solution
A backlight module design featuring a quantum bar fixed by latching members on a middle frame and a back plate, with reflective layers to enhance light coupling efficiency, reducing manufacturing complexity and cost, and eliminating the risk of the quantum dots florescent powder glass tube breaking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If quantum dots florescent powder film is used in big-size LCDs, then the area coverage is increased, but the manufacturing cost increases due to extensive material requirement and uniform coating complexity
Solution Approach 1:
The patent segments the quantum dots florescent powder into discrete packages positioned at specific locations along the light guide plate, rather than requiring continuous uniform coating across the entire large area. This segmentation allows for localized placement of quantum dots material, reducing the total amount of material needed and simplifying the manufacturing process for big-size LCDs
Solution Approach 2:
The patent implements local quality by concentrating quantum dots packages at specific strategic locations rather than uniform distribution. The packages are positioned where they can most effectively convert blue LED light to other wavelengths, optimizing performance while reducing overall material consumption and manufacturing complexity
2Reliability
If quantum dots florescent powder glass tube is used, then the quantum dots material is protected, but the device complexity increases and manufacturing cost increases
Solution Approach 1:
The patent extracts the quantum dots material from complex glass tube encapsulation and places it in simpler discrete packages. This extraction maintains the protective function while eliminating the complexity of glass tube manufacturing and assembly, thereby reducing device complexity and manufacturing cost while still protecting the quantum dots material
Solution Approach 2:
The patent replaces expensive and complex glass tube encapsulation with simpler, more cost-effective packages that can be easily manufactured and assembled. These simplified packages provide adequate protection for the quantum dots material without the high cost and complexity of glass tube fabrication
3Reliability
If quantum dots florescent powder glass tube is used, then the quantum dots material is protected, but the reliability decreases due to ease of breakage
Solution Approach 1:
The patent extracts the quantum dots material from fragile glass tube encapsulation and places it in more robust packages that are resistant to breakage. This extraction maintains the protective function while eliminating the fragility issue, thereby improving reliability without compromising material protection
Solution Approach 2:
The patent replaces fragile glass tube encapsulation with simpler, more durable packages that are less prone to breakage. These simplified packages provide adequate protection while being more robust and reliable in practical applications
4Adaptability or versatility
If optical film configuration is changed, then the flexibility is improved, but the color tone and brightness vary significantly
Solution Approach 1:
The patent uses preliminary action by pre-positioning quantum dots packages at optimized locations before final assembly. This preliminary placement ensures that regardless of subsequent optical film configuration changes, the quantum dots are positioned to maximize light conversion efficiency, thereby maintaining more consistent color tone and brightness while allowing flexibility in optical film selection
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 simplifies the fixing process, reduces costs, improves light coupling efficiency, and prevents breakage of the quantum dots florescent powder glass tube, while maintaining high color gamut performance.
Implementation Method 1
Quantum dots can control the wavelength of the light using the size of the crystals, thereby controlling the color of the light. Thus, quantum dots material is used in the backlight, the high frequency light source (i.e., blue LEDs) is used to replace the conventional white LEDs.
Data Source
AI summary
A backlight module includes a back plate having a side wall, a light guide plate disposed on the back plate and having a light incident surface, a light source disposed on the sidewall and adjacent to the light incident surface, a middle frame overlying the light guide plate and the light source, a first latching member disposed on a side of the middle frame facing toward the back plate and having a first groove, a second latching member disposed on a side of the back plate facing toward the middle frame and having a second groove, and a quantum bar, one end of which is latched in the first groove and the other end is latched in the second groove. The present invention also provides a LCD including the backlight module. The fixing manner of the quantum bar is simple and the cost is reduced.