Backlight Module Frame Extension Design for Blue Light Leak Prevention
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Solution Overview
Problem
Blue light leaks from the edges of liquid crystal displays due to gaps between the quantum dot enhancement film and the frame, leading to a less than ideal visual experience.
Innovation Solution
A backlight module design where the quantum dot enhancement film is positioned between the light guiding plate and an optical film, with a frame extension covering the edges of the film, ensuring that blue light emitted from the light guiding plate passes through the quantum dot enhancement film, preventing leaks by adjusting the distances between the frame extensions and the film edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the quantum dot enhancement film is positioned close to the frame to prevent blue light leaks, then blue light leak is reduced, but the film may suffer from compressive deformation due to thermal expansion
Solution Approach 1:
The frame extension portions are designed in advance with sufficient length to cover the quantum dot enhancement film edges, preventing blue light leaks before they occur. This preliminary structural arrangement ensures the film is properly covered without requiring post-adjustment, while the design anticipates thermal expansion issues by providing adequate coverage margin.
Solution Approach 2:
The frame extension portions act as an intermediary structure between the light guiding plate and the quantum dot enhancement film. These extensions provide a buffer zone that allows the film to be covered for blue light prevention while maintaining sufficient distance from the main frame body, thus reducing direct thermal stress transmission to the film.
2Stability of the object's composition
If the quantum dot enhancement film is kept at a predetermined distance from the frame to prevent compressive deformation, then film stability is maintained, but blue light leaks from the gap between the film and frame
Solution Approach 1:
The frame is segmented into main frame body and extension portions, where the extension portions specifically cover the quantum dot enhancement film edges. This segmentation allows the main frame to maintain distance from the film for stability, while the extensions provide localized coverage to prevent blue light leaks from the edges.
Solution Approach 2:
The solution extends the frame in the Z-direction (thickness direction) through extension portions that protrude toward the quantum dot enhancement film. This dimensional extension allows the frame to cover the film edges without requiring the main frame body to be closer to the film, thus preventing blue light leaks while maintaining film stability.
3Object-affected harmful factors
If the frame extension portions are made longer to fully cover the quantum dot enhancement film edges, then blue light leaks are prevented, but the device complexity increases
Solution Approach 1:
The frame extension portions are integrated into the single frame structure rather than being separate components. This merging approach allows the extensions to be formed as one piece with the main frame, simplifying manufacturing and assembly while achieving blue light leak prevention through the extended coverage areas.
Solution Approach 2:
The frame extension portions serve multiple functions: they cover the quantum dot enhancement film edges to prevent blue light leaks, provide structural support, and maintain proper positioning of the film. This multi-functionality reduces the need for additional separate components, thereby reducing overall device complexity.
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 blue light leaks from the edges of the display, enhancing the visual experience by ensuring all blue light is converted to wider spectrum white light, thereby improving color saturation and display quality.
Implementation Method 1
Quantum dot enhancement film has a plurality of quantum dot phosphors of different sizes to convert the incident blue light to light having different wavelengths
Data Source
AI summary
The invention provides a backlight module including: a light guiding plate having a first side surface and a second side surface; a plurality of light sources arranged along the second side surface of the light guiding plate; a quantum dot enhancement film (QDEF) disposed above the light guiding plate, wherein the QDEF includes a first edge adjacent to the first side surface and a second edge adjacent to the second side surface; and a frame disposed outside the light guiding plate, the frame having a first extension portion covering the first edge of the QDEF and a second extension portion covering the second edge of the QDEF, wherein a distance between an end of the first extending portion and the first edge of the QDEF is greater than a distance between an end of the second extension portion and the second edge of the QDEF.