Image-Forming Apparatus With OLED Resonator Spectral Matching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrophotographic image-forming apparatuses face inefficiencies in image formation due to misalignment between the emission spectrum of organic light-emitting elements and the absorption spectrum of photosensitive members, leading to reduced light absorption by the photosensitive member.
Innovation Solution
The image-forming apparatus incorporates an organic light-emitting element with an optical resonator structure that aligns the maximum peak wavelength of its emission spectrum closer to the absorption spectrum of the photosensitive member, enhancing light absorption efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an organic light-emitting element with optical resonator structure is used to increase emission intensity, then light emission intensity is improved, but the emission peak wavelength may shift away from the absorption spectrum of the photosensitive member, reducing light absorption efficiency
Solution Approach 1:
The patent applies parameter changes by adjusting the emission peak wavelength of the organic light-emitting element through the optical resonator structure to match the absorption spectrum of the photosensitive member. This involves modifying optical parameters (resonator dimensions, materials) to shift the emission wavelength to an optimal value that maximizes absorption by the photosensitive member, thereby resolving the contradiction between emission intensity and absorption efficiency.
Solution Approach 2:
The patent employs dynamics by making the optical resonator structure adjustable or tunable, allowing the emission peak wavelength to be dynamically optimized for different photosensitive members. This dynamic adjustment capability enables the system to adapt to varying absorption spectra while maintaining high emission intensity, thus resolving the wavelength mismatch problem.
2Loss of energy
If the emission spectrum of the organic light-emitting element is aligned with the absorption spectrum of the photosensitive member, then light absorption efficiency is improved, but the emission intensity at the peak wavelength may be reduced
Solution Approach 1:
The patent uses parameter changes to simultaneously optimize both emission intensity and absorption efficiency by precisely controlling the resonator parameters (such as cavity size, mirror reflectivity, and resonator material) to achieve a wavelength match between emission and absorption spectra while maintaining high emission intensity through resonant enhancement.
Solution Approach 2:
The patent applies the copying principle by using the optical resonator structure to create a copied or enhanced version of the emission spectrum that is specifically tailored to match the absorption spectrum of the photosensitive member. The resonator effectively copies and amplifies the emission at the optimal wavelength, achieving both high intensity and efficient absorption.
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 configuration results in higher image formation efficiency by ensuring that the photosensitive member effectively absorbs more light, thereby improving the overall image quality and efficiency of the image-forming process.
Implementation Method 1
an optical resonator structure on a first surface of the substrate... a maximum peak wavelength in a visible light region of an emission spectrum of the organic light-emitting element resonated by the optical resonator structure
Implementation Method 2
Light-emitting elements known to be included in the exposure portion include a light-emitting diode (LED), an organic light-emitting diode (OLED)... A photosensitive member is exposed to light emitted from these light-emitting elements
Implementation Method 3
a photosensitive member configured to receive light from the organic light-emitting element... the maximum peak wavelength... is closer to a wavelength of a maximum absorption value in the visible light region of an absorption spectrum of the photosensitive member
Data Source
AI summary
An image-forming apparatus including a substrate, an organic light-emitting element with an optical resonator structure on a first surface of the substrate, and a photosensitive member configured to receive light from the organic light-emitting element. The organic light-emitting element includes a first electrode, an organic compound layer containing a light-emitting material, and a second electrode in this order from the first surface. A maximum peak wavelength in a visible light region of an emission spectrum of the organic light-emitting element resonated by the optical resonator structure is closer to a wavelength of a maximum absorption value in the visible light region of an absorption spectrum of the photosensitive member than a maximum peak wavelength in the visible light region of a photoluminescent spectrum of the light-emitting material.