Micro LED Display Panel with Diffraction Grating for Flexible Substrates
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Solution Overview
Problem
Existing liquid crystal display devices are limited by their thickness and flexibility due to stacked structures, and they consume excessive power due to the need for a backlight and color filter substrate.
Innovation Solution
A micro light emitting diode display panel comprising a flexible substrate with light emitting diodes, a diffraction grating, and a light scattering film, which emits white light that is split into primary colors and adjusted in intensity by light valves, eliminating the need for a backlight and color filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a stacked structure with backlight module, polarizers, and color filter is used, then display function is achieved, but thickness and flexibility are limited
Solution Approach 1:
The patent extracts and removes the backlight module and color filter from the display structure, replacing them with self-emissive micro-LEDs that generate their own light. This eliminates the need for separate backlight and color filtering components, directly reducing thickness while maintaining display functionality.
Solution Approach 2:
The patent employs flexible substrate and thin-film structures to replace rigid stacked components. The micro-LEDs are mounted on flexible substrates, enabling the display to achieve bending and folding capabilities while maintaining structural integrity and display performance.
2Illumination intensity
If color filter substrate is used, then color display is achieved, but light energy is consumed (at least 60% loss)
Solution Approach 1:
The patent converts the harmful light absorption by color filters into a beneficial process by using quantum dot materials that emit specific wavelengths when excited. Instead of filtering out unwanted wavelengths (wasting energy), the system generates only the desired wavelengths directly, converting energy loss into efficient light emission at target colors.
Solution Approach 2:
The patent replaces the passive optical filtering mechanism (color filter substrate) with an active light generation mechanism (quantum dots). This substitution transforms the system from one that consumes energy to filter light into one that efficiently generates light at the desired wavelengths, dramatically reducing power consumption.
3Illumination intensity
If backlight brightness is increased to satisfy brightness requirement, then brightness is improved, but power consumption increases
Solution Approach 1:
The patent implements self-service by using micro-LEDs that generate their own light without requiring a separate backlight module. Each pixel is self-emissive, eliminating the need for a power-hungry backlight system while maintaining brightness requirements. The display panel serves its own lighting needs through the self-emissive properties of micro-LEDs.
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 allows for a thinner, more flexible display panel that reduces power consumption by eliminating the need for a backlight and color filter, while achieving desired brightness and color through efficient light management.
Implementation Method 1
the diffraction grating splits the white light emitted by the light emitting diodes to form a plurality of exiting lights with various wavelengths
Implementation Method 2
the light scattering film gathers an exiting light of a same wavelength in the exiting lights and disperses the exiting lights of different wavelengths to form a primary color light of at least one color
Data Source
AI summary
Provided is a micro light emitting diode display panel, comprising a flexible substrate, light emitting diodes aligned in an array, a diffraction grating and a light scattering film arranged on the light emitting diodes and light valves arranged above the light scattering film; wherein the flexible substrate comprises a driving circuit, the light emitting diodes are fixed on the flexible substrate; the driving circuit is connected to the light emitting diodes to respectively drive the light emitting diodes to emit white light; the diffraction grating splits the white light emitted by the light emitting diodes to form exiting lights with various wavelengths; the light scattering film gathers an exiting light of a same wavelength in the exiting lights and disperses the exiting lights of different wavelengths to form a primary color light of at least one color; the light valves adjusts an intensity of the primary color light.