Multi-Color LED Using Blue Light Conversion and Partitioned Anode
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Solution Overview
Problem
Conventional OLEDs require separate sub-pixels for red, green, and blue light emission, which limits their efficiency and thickness compared to LCDs, and they struggle with slower response times and lower power efficiency.
Innovation Solution
A light-emitting diode structure utilizing a blue light component to produce red and green light components through a light re-emitting layer with specific excitable materials, allowing for separate control of red, green, and blue light emission in a single diode section, thereby eliminating the need for distinct sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate sub-pixels are used for red, green, and blue light emission, then color display capability is achieved, but device thickness increases and efficiency decreases
Solution Approach 1:
The patent merges multiple color emission functions into a single diode structure by integrating a blue light emitting material with light re-emitting layers containing excitable materials that convert blue light to red and green light. This consolidation eliminates the need for separate sub-pixels while maintaining full color display capability, thereby reducing device thickness.
Solution Approach 2:
The single diode structure performs multiple functions: the blue light emitting material generates blue light, the first excitable material converts it to red light, the second excitable material converts it to green light, and the transparent material allows blue light transmission. This multi-functional integration replaces what traditionally required four separate sub-pixels, reducing overall device thickness.
2Adaptability or versatility
If separate sub-pixels are used for red, green, and blue light emission, then color display capability is achieved, but manufacturing complexity and material usage increase
Solution Approach 1:
The patent combines multiple color emission functions into a single diode structure by integrating a blue light emitting material with light re-emitting layers containing excitable materials that convert blue light to red and green light. This consolidation eliminates the need for separate sub-pixels while maintaining full color display capability, thereby reducing device thickness.
Solution Approach 2:
The single diode structure performs multiple functions: the blue light emitting material generates blue light, the first excitable material converts it to red light, the second excitable material converts it to green light, and the transparent material allows blue light transmission. This multi-functional integration replaces what traditionally required four separate sub-pixels, reducing overall device thickness.
3Adaptability or versatility
If conventional OLED structure with separate sub-pixels is used, then color display is achieved, but response time is slow and power efficiency is low
Solution Approach 1:
The patent combines multiple color emission functions into a single diode structure by integrating a blue light emitting material with light re-emitting layers containing excitable materials that convert blue light to red and green light. This consolidation eliminates the need for separate sub-pixels while maintaining full color display capability, thereby reducing device thickness.
Solution Approach 2:
The single diode structure performs multiple functions: the blue light emitting material generates blue light, the first excitable material converts it to red light, the second excitable material converts it to green light, and the transparent material allows blue light transmission. This multi-functional integration replaces what traditionally required four separate sub-pixels, reducing overall device thickness.
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 approach enables thinner, more efficient OLEDs with improved viewing angles and contrast ratios, as well as independent control of each color's brightness, enhancing overall display performance.
Implementation Method 1
a light re-emitting layer adjacent to the second electrode layer, arranged to receive at least part of the first light component, the light re-emitting layer comprising a first excitable material arranged to emit a second light component in a second wavelength longer than the first wavelength in response to the first light component
Data Source
AI summary
A color light-emitting diode using a blue light component to produce red light and green light is disclosed. A blue-light emitting material is provided between a cathode layer and an anode layer for emitting the blue light component. A light re-emitting layer has a first material in a first diode section arranged to produce a red light component in response to the blue light component, and a second material in a second diode section arranged to produce a green light component in response to the blue light component. A transparent material in a third diode section allows part of the blue light component to transmit through. The anode layer is partitioned into three electrode portions separately located in the three diode sections, so that the red, green and blue light components in the diode sections can be separately controlled.