Backlight Module Green Compensation Layer Edge Failure
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Solution Overview
Problem
Quantum dot films in backlight modules are prone to edge failures due to reaction with water and oxygen, leading to display abnormalities, particularly a fuchsia color defect, because of their small particle size and high surface energy, especially for green quantum dots.
Innovation Solution
A backlight module with a green polycarbonate plastic frame that includes a green compensation layer, such as green polyethylene terephthalate or polyimide, surrounding a light guide plate and quantum dot film, where the green compensation layer is integrated into the frame or coated on its surface, ensuring that reflected green light compensates for edge failures by mixing with blue and red light to produce white light, thus masking the fuchsia color defect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If quantum dot film is used to improve gamut, then display color performance is improved, but edge failure occurs due to reaction with water and oxygen
Solution Approach 1:
A green compensation layer is introduced as an intermediary between the blue LED light source and the quantum dot film. This layer reflects green light that compensates for the spectral gap, allowing the quantum dot film to maintain its gamut improvement function while the compensation layer protects against edge failure by providing an additional light path that masks edge defects.
Solution Approach 2:
The invention changes the spectral composition parameter by adding green light reflection to the blue LED output. This creates a composite light spectrum that maintains color accuracy even when quantum dot film edge failure occurs, as the green compensation layer provides sufficient green wavelength light independently of the quantum dot film's performance at the edges.
2Illumination intensity
If green quantum dot is used to enhance green color, then gamut is improved, but edge failure occurs more frequently due to high surface energy
Solution Approach 1:
The green compensation layer acts as a mediator that provides green light reflection independently of the green quantum dot's stability. This allows the system to maintain green color performance without relying solely on the vulnerable green quantum dot edges, effectively decoupling the green color function from the unstable quantum dot material at the edges.
Solution Approach 2:
The invention applies local quality by positioning the green compensation layer specifically at regions where green light enhancement is needed and where edge failure is most likely to occur. This localized green reflection compensates for edge defects precisely where they affect display quality, while the quantum dot film maintains its gamut enhancement function in protected central regions.
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 green compensation layer effectively increases brightness at the edges of the backlight module, transforming the fuchsia edge failure region into a white color consistent with normal regions, thereby resolving display abnormalities caused by quantum dot film edge failures.
Implementation Method 1
the green compensation layer is integrated into the frame or coated on its surface, ensuring that reflected green light compensates for edge failures by mixing with blue and red light to produce white light
Implementation Method 2
After excited, a florescent light is emitted in order to change the gamut of an incident light
Data Source
AI summary
The present invention provides a backlight module, including a plastic frame, a light guide plate, a reflective sheet, a backlight lamp and an optical film, wherein the light guide plate and the optical film are sequentially overlapped and disposed on the reflective sheet; the plastic frame surrounds the light guide plate and the optical film, and a peripheral edge of the plastic frame is provided and received with the backlight lamp; the backlight module also includes a quantum dot film; an inner circumferential surface of the plastic frame is provided with a green compensation layer; the backlight lamp is located between a light incident surface of the light guide plate and the plastic frame; the quantum dot film is overlapped on the light guide plate, and is located between the light guide plate and the optical film. A display panel is also disclosed.