Light Guiding Plate With Embedded Quantum Dots For Thin Backlight Modules
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Solution Overview
Problem
Conventional backlight modules using quantum dot thin films for improved color gamut are susceptible to environmental factors, leading to thickness issues and limited application in thin devices like mobile phones.
Innovation Solution
A light guiding plate comprising a main board body and a sub board body with quantum dots embedded within the sub board body, which serves as the incident surface for light, allowing for improved color gamut without increasing the module's thickness, and is protected from environmental effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a thin film of quantum dot is loaded between the light guiding plate and a prism sheet to improve color gamut, then the color gamut of the liquid crystal display is improved, but the package thickness must be increased to protect the quantum dot from environmental factors such as moisture
Solution Approach 1:
The quantum dots are embedded inside the hollow cavity of the light guiding plate, nesting the quantum dot layer within the existing structural volume rather than adding it as a separate external layer. This allows the quantum dots to be protected without increasing the overall package thickness.
Solution Approach 2:
Instead of placing the quantum dot thin film in the traditional planar position between the light guiding plate and prism sheet, the invention relocates the quantum dots to the hollow cavity space, utilizing a different spatial dimension within the existing structure to achieve both protection and thinness.
2Reliability
If the package thickness is increased to protect the quantum dot thin film from environmental factors, then the quantum dot is protected from moisture and external environment, but the application in thin mobile phones is limited
Solution Approach 1:
The quantum dots are nested within the hollow cavity of the light guiding plate, which serves as a protective enclosure. This nesting approach provides environmental protection while maintaining a compact overall thickness suitable for thin mobile phones.
Solution Approach 2:
The hollow cavity structure acts as an intermediary protective barrier between the quantum dots and the external environment, providing protection without requiring additional thick packaging layers.
3Illumination intensity
If the quantum dot thin film is placed between the light guiding plate and prism sheet, then the color gamut is improved, but the edge of the film may become invalid and the thickness of package needs to be thick
Solution Approach 1:
The quantum dots are embedded inside the hollow cavity of the light guiding plate, where they are fully enclosed and protected. This eliminates edge exposure and invalidation issues that occur when the quantum dot film is placed externally between components.
Solution Approach 2:
The hollow cavity of the light guiding plate serves as a protective shell structure that encloses the quantum dots, providing edge protection and ensuring the entire quantum dot area remains valid and functional.
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 color gamut quality while maintaining a thin profile for backlight modules and display devices by embedding quantum dots within the sub board body, ensuring the quantum dots are not affected by external environments, thus eliminating the need for additional thickness in packaging.
Implementation Method 1
Since electrons and holes are quantified, so that a continuous energy band becomes a separate energy level having the properties of the molecules. Thus, when they are excited, fluorescent can be emitted, so that the color gamut is further changed.
Data Source
AI summary
The disclosure provides a light guiding plate, used in a backlight module. The light guiding plate comprises a main board body and a sub board body. The main board body has an illuminating surface, a back surface opposite to the illuminating surface, and a first incident surface connected with the illuminating surface and the back surface. A plurality of quantum dots is uniformly embedded inside the sub board body. The sub board body is disposed on the first incident surface. The sub board body completely covers the first incident surface. The sub board body has a second incident surface, and the second incident surface is away from the first incident surface. The second incident surface is disposed opposite to a backlight source of the backlight module. The disclosure further provides a backlight module and a display.