Graphene Backlight Module for Thinned LCD Structure
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Solution Overview
Problem
Existing liquid crystal displays (LCDs) have a complex structure due to the need for separate backlight modules and TFT driving units, which complicates their design and prevents thinning.
Innovation Solution
A graphene backlight module is introduced, comprising a lower substrate with alternately disposed graphene sources and drains, a graphene light generation layer, insulating protection layers, and a metallic reflection layer, which functions as both a lighting and driving unit for the liquid crystal, eliminating the need for a light guide plate and optical films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional backlight module with light guide plate and optical films is used, then the LCD can display images, but the structure becomes complicated and the device cannot be thinned
Solution Approach 1:
The patent combines the backlight generation function and the TFT driving function into a single integrated module. The graphene light generation layer serves as both the light source for the backlight and the active layer for TFT operation, eliminating the need for separate backlight modules and TFT driving units, thus simplifying the overall structure and enabling device thinning
Solution Approach 2:
The patent extracts and eliminates unnecessary components from the conventional LCD structure, specifically removing the light guide plate and optical films by replacing them with the graphene-based light generation layer that directly produces light without requiring these additional optical elements
2Ease of manufacture
If multiple separate components (backlight module, TFT driving unit) are used, then each component can perform its function, but the manufacturing process becomes complex
Solution Approach 1:
The invention merges the backlight module and TFT driving unit into a single integrated structure where the graphene light generation layer serves dual purposes as both light source and TFT active layer, reducing the number of components and simplifying the manufacturing process
3Length of stationary object
If conventional backlight modules with light guide plates are used, then light can be distributed, but the device thickness increases
Solution Approach 1:
The patent removes the light guide plate and optical films from the conventional backlight structure, replacing them with a graphene-based light generation layer that directly emits light, thereby reducing device thickness while maintaining light distribution functionality
Solution Approach 2:
The patent replaces the mechanical optical system (light guide plate and optical films for light distribution) with a graphene-based electroluminescent system that generates and distributes light electronically, eliminating the need for thick mechanical optical components
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 simplifies the LCD structure and manufacturing process, achieves thinning, reduces color shift, and enhances color richness by using graphene for light generation, allowing the module to produce red, green, and blue lights with adjustable intensity and purity.
Implementation Method 1
The graphene light generation blocks produce red light if the voltage difference between the graphene gates and sources is 3.3 ̃10V; the graphene light generation blocks produce green light of the voltage difference between the graphene gates and sources is 20 ̃30V; and the graphene light generation blocks produce blue light if the voltage difference between the graphene gates and sources is 40 ̃50V
Implementation Method 2
The metallic reflection layer is disposed along a side of the lower substrate away from the graphene light generation layer
Data Source
AI summary
The present disclosure teaches a graphene backlight module and a liquid crystal display (LCD) device including the backlight module. The backlight module includes a lower substrate, a number of graphene sources, a number of graphene drains, a graphene light generation layer, a first insulating protection layer, a number of graphene gates, and a second insulating protection layer. Graphene is used to make the gates, sources, drains, and the light generation layer of the backlight module. The graphene backlight module therefore functions both as a lighting unit and a driving unit to the liquid crystal, thereby simplifying the LCD device's structure and manufacturing process. In addition, as there is no need for the light guide plate and optical films required by conventional backlight modules, the thinning of the LCD device is achievable.