Backlight Module Yellow Fluorescent Frame Color Gamut
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Solution Overview
Problem
Current liquid crystal display backlight modules suffer from non-uniform color gamut due to invalid zones, resulting in noticeable color differences between these areas and the rest of the display, which affects the overall color vividness and definition.
Innovation Solution
A high color gamut backlight module is designed with a non-opaque first plastic frame, a light guide plate, and a quantum membrane, where the first plastic frame is coated with yellow fluorescent powder or filled with it, and a second plastic frame is used in close contact, along with a reflection layer and a back plate, to ensure uniform light emission and minimize color differences by converting blue light to white light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a quantum membrane is used to expand color gamut, then color vividness is improved, but color uniformity deteriorates due to invalid zones
Solution Approach 1:
The patent applies local quality by making the first plastic frame non-opaque while the second plastic frame is opaque, and by positioning the yellow fluorescent layer specifically on the first plastic frame. This creates localized light emission properties that compensate for the invalid zones of the quantum membrane, improving color uniformity without sacrificing overall color gamut expansion.
Solution Approach 2:
The first plastic frame with yellow fluorescent layer acts as an intermediary element between the light guide plate and the quantum membrane. It converts blue light to yellow light locally, filling in the color deficiencies in the invalid zones and mediating between the light source and the quantum membrane to achieve uniform color output.
2Stability of the object's composition
If a non-opaque first plastic frame with yellow fluorescent layer is added, then color uniformity is improved, but device complexity increases
Solution Approach 1:
The patent merges the first and second plastic frames into a single integrated frame structure formed through bi-color injection molding. This combining approach reduces the number of separate components and assembly steps, offsetting the added complexity from introducing the yellow fluorescent layer while maintaining color uniformity improvements.
Solution Approach 2:
The first plastic frame is created as a composite material containing yellow fluorescent powder dispersed in a transparent resin matrix. This composite approach allows the frame to simultaneously provide structural support, light guidance, and wavelength conversion functions, reducing the need for separate components and simplifying the overall device structure.
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
This configuration enhances color uniformity and gamut by reducing color differences between the invalid and visible zones, resulting in a more vivid and uniform display.
Implementation Method 1
a top surface of the first plastic frame is a yellow fluorescent layer... the yellow fluorescent layer is excited to generate a white light
Implementation Method 2
a quantum membrane is provided between the upper surface of the light guide plate and the optical membrane set
Implementation Method 3
the high color gamut backlight module further includes a reflection layer which is provided on the lower surface of the light guide plate
Data Source
AI summary
A high color gamut backlight module including a non-opaque first plastic frame, a light guide plate, an optical membrane set and a quantum membrane; the optical membrane set and the quantum membrane are stacked, from top to bottom, on the light guide plate; an inner side surface and a top surface of the first plastic frame are provided opposite to one end surface of the light guide plate and a lower surface of the quantum membrane, respectively; a top surface of the first plastic frame is a yellow fluorescent layer.