Graphene LED Backlight for Liquid Crystal Display
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Solution Overview
Problem
Conventional liquid crystal display apparatuses have high manufacture costs and low image resolution due to the need for multiple single-color sub-pixel units and a black matrix to prevent interference, which complicates the manufacturing process.
Innovation Solution
A liquid crystal display apparatus utilizing a graphene LED backlight source that directly emits red, green, and blue light, eliminating the need for color filters and a black matrix, and incorporating a blue phase liquid crystal layer and polarizing films to achieve high image resolution and low manufacture costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If color filters and black matrix are disposed in conventional liquid crystal display panel to achieve color display, then color display function is realized, but manufacture cost increases and image resolution decreases
Solution Approach 1:
The patent extracts and removes the color filters and black matrix from the liquid crystal display panel structure. By using a backlight source that directly emits red, green, and blue light, the patent eliminates the need for color filters that were traditionally required to produce color display, thereby simplifying the panel structure and improving image resolution without the obstruction of black matrix.
Solution Approach 2:
Instead of using a white backlight source and filtering specific wavelengths through color filters to produce color display, the patent inverts the approach by using a backlight source that directly emits the three primary colors (red, green, blue) and eliminates the filtering process. This inversion removes the need for color filters and black matrix, reducing manufacturing complexity and improving resolution.
2Adaptability or versatility
If multiple single-color sub-pixel units are disposed to achieve color display, then color display function is realized, but device complexity increases
Solution Approach 1:
The patent applies multi-functionality by using a single backlight source structure that can emit red, green, and blue light. This universal backlight source replaces the need for separate red, green, and blue sub-pixel units with different color filters, as the same physical location can produce different colors by controlling the backlight source's emission wavelength, thereby reducing device complexity.
Solution Approach 2:
The patent merges the functions of multiple color-filtered sub-pixel units into a single location on the liquid crystal panel. By combining the red, green, and blue light-emitting capabilities into one backlight source, the patent eliminates the need for separate sub-pixel structures with different color filters, simplifying the overall panel architecture while maintaining full-color display functionality.
3Reliability
If black matrix is disposed among sub-pixel units to prevent interference, then signal interference is reduced, but manufacturing cost increases
Solution Approach 1:
The patent extracts and removes the black matrix from the display panel structure. By using a backlight source that directly emits red, green, and blue light without requiring color filters, the patent eliminates the need for black matrix to separate sub-pixel units, as the liquid crystal layer itself provides sufficient optical isolation between different color emission 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 solution enables high image resolution and reduced manufacturing costs by eliminating the need for color filters and a black matrix, while using graphene LED chips and blue phase liquid crystal molecules to achieve efficient light emission and display.
Implementation Method 1
a graphene LED backlight source for providing a light output having one of red, green, and blue colors
Implementation Method 2
a light-emitting layer for emitting the light output from the backlight source based upon the control voltage and a voltage of the power supply
Implementation Method 3
a first polarizing film for converting the light output from the backlight source into a polarized light
Implementation Method 4
a liquid crystal layer including liquid crystal molecules used for deflecting the polarized light from the backlight source to form a polarized output light
Implementation Method 5
the liquid crystal layer is a blue phase liquid crystal layer including blue phase liquid crystal molecules
Data Source
AI summary
A liquid crystal display apparatus is provided. The liquid crystal display apparatus includes a graphene LED backlight source, a first polarizing film, a first substrate, a liquid crystal layer, a second substrate and a second polarizing film. The graphene LED backlight source is used for providing light output, the first polarizing film is used for converting the light output from the backlight source into a polarized light. The liquid crystal layer includes liquid crystal molecules used for deflecting the polarized light from the backlight source to form a polarized output light, and the second polarizing film is used for emitting the polarized output light.