Display Panel Filler Configuration for Pixel Light Crosstalk Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In display technology using LED+QD structures, there is a challenge in preventing color mixture of light from different pixels due to gaps between the backlight source and the quantum dot layer, despite the presence of black matrices and barrier wall structures.
Innovation Solution
A display panel design with a filler portion between substrates, containing a material with a higher refractive index than the optical structure, and extinction structures with light-absorbing materials, which blocks non-collimated light rays and prevents cross-color by aligning light sources, optical structures, and quantum dots to ensure collimated light excites the correct pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If gaps are left between the backlight source and the quantum dot layer, then assembly is easier and manufacturing is simpler, but light crosstalk occurs and color purity deteriorates
Solution Approach 1:
The patent introduces a filler portion as an intermediary substance filled into the gap between the light source and quantum dot layer. This filler portion contains light-absorbing particles that act as a mediator to absorb stray light and prevent crosstalk, while still allowing the gap structure to exist for ease of assembly and manufacturing.
Solution Approach 2:
The filler portion is composed of composite materials including light-absorbing particles dispersed in a resin matrix. This composite structure combines the light-absorbing properties of the particles with the structural integrity and fillability of the resin, effectively preventing light crosstalk while maintaining the gap configuration.
2Object-affected harmful factors
If black matrices and barrier wall structures are used to prevent light crosstalk, then color purity improves, but device complexity increases
Solution Approach 1:
The patent extracts the light-absorbing function from the complex black matrix and barrier wall structures and concentrates it into the filler portion within the gap. This simplifies the overall structure by removing the need for additional light-blocking components while maintaining color purity through the filler's light-absorbing particles.
3Use of energy by moving object
If the refractive index of the filler portion is higher than the optical structure, then light extraction efficiency improves, but internal reflection increases
Solution Approach 1:
The patent applies local quality by creating refractive index variation within the filler portion through the distribution of light-absorbing particles. The resin matrix provides a base refractive index for light extraction, while the particles create local variations that scatter and absorb light, preventing excessive internal reflection and directing light effectively toward the quantum dot layer.
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 design effectively prevents cross-color by blocking non-collimated light and scattering particles, ensuring accurate color display and reducing light crosstalk between pixels.
Implementation Method 1
the filler portion contains a material with a refractive index greater than that of a material of the first optical structure
Implementation Method 2
the extinction structure contains a light-absorbing material
Implementation Method 3
red and green photoluminescence QD materials may generally be excited by blue light emitted by the LED
Data Source
AI summary
A display panel includes a first base substrate, a plurality of light sources on the first base substrate, a second base substrate opposite to the first base substrate, a light conversion structure on the second base substrate, a plurality of extinction structures on a side of the light conversion structure facing the first base substrate, a first channel formed between any two adjacent extinction structures, a plurality of first optical structures on a side of the light conversion structure facing the first base substrate, wherein the plurality of first optical structures are respectively located in the first channels each between any two adjacent extinction structures, and a filler portion between the plurality of light sources and the plurality of first optical structures. The filler portion contains a material with a refractive index greater than that of a material of the first optical structure, and the extinction structure contains light-absorbing material.