Polarizing Emission Layer with Quantum Rods for Display Panels
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Solution Overview
Problem
Display panels using color filters and polarizing layers suffer from light transmission losses, which degrade visibility and increase power consumption.
Innovation Solution
A display panel incorporating a polarizing emission layer with quantum rods that emits polarized light, aligned to match the polarization direction of the polarizing layer, minimizing light loss and allowing for color implementation without color filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If color filters are used to implement colors on a flat display panel, then color implementation is achieved, but light transmission loss occurs due to the transmittance limitations of the color filters
Solution Approach 1:
The patent extracts and removes the color filters from the display panel structure, replacing them with a polarizing emission layer that directly emits colored light. This eliminates the light transmission loss caused by color filters while maintaining color implementation capability through the polarized light emission properties of the quantum rod-containing layer
Solution Approach 2:
The patent changes the fundamental parameter of light emission from passive filtering to active polarized emission. By incorporating quantum rods into the emission layer, the system transitions from transmitting filtered light to emitting polarized light directly, fundamentally altering how color is achieved and eliminating transmission losses
2Object-affected harmful factors
If a polarizing layer is used to suppress reflection of external light, then visibility is enhanced, but light transmission loss still occurs
Solution Approach 1:
The patent merges the functions of the polarizing layer and the color emission layer into a single polarizing emission layer. This integrated layer simultaneously provides polarization to suppress external light reflection and emits colored light directly, eliminating the need for separate color filters and reducing overall light transmission loss
Solution Approach 2:
The polarizing emission layer performs multiple functions simultaneously: it polarizes light to suppress external reflection, emits colored light to implement colors, and eliminates the need for separate color filtering components. This multi-functionality resolves the contradiction by achieving both visibility enhancement and reduced light loss through a single integrated solution
3Ease of manufacture
If color filters are used to implement colors, then color display is achieved, but the intensity of transmitted light is lowered
Solution Approach 1:
The patent replaces the passive mechanical filtering system (color filters that block certain wavelengths) with an active emission system (quantum rods that emit specific wavelengths through electroluminescence). This substitution maintains color display capability while preserving light intensity because the quantum rods emit light rather than filtering it
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 solution reduces light transmission losses, enhances visibility, and decreases power consumption by using self-emission from the polarizing emission layer, thereby improving the reliability and service life of the display panel.
Implementation Method 1
The quantum rod emits light according to the quantum confinement effect when the quantum rod is exposed to light
Implementation Method 2
If the aspect ratio of the quantum rod is greater than or equal to 1:1, the quantum rod emits polarized light in the longitudinal direction when depolarized light is incident on the quantum rod
Data Source
Figure 1A
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Figure 1C
AI summary
Disclosed herein is a display panel including a polarizing emission layer. An organic light emitting device is formed on a first substrate. A polarizing emission layer are formed on a second substrate facing the first substrate. The polarizing emission layer is formed in a subpixel area corresponding to the organic light emitting device. The polarizing emission layer includes quantum rods. The quantum rods are aligned in one direction to be polarized. Accordingly, loss of transmitting light in the display panel including the polarizing layer may be minimized. In addition, since colors are implemented by the quantum rods included in the polarizing emission layer, color filters can be replaced by the quantum rods, and loss of light resulting from the color filters may be minimized.