Display Apparatus Crosstalk Reduction via Layer Segmentation
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Solution Overview
Problem
Existing display technologies face challenges in reducing crosstalk and power consumption while maintaining high convenience and reliability, particularly in the manufacturing of organic EL displays without using fine metal masks.
Innovation Solution
A display apparatus comprising a first and second light-emitting device with specific electrode and layer configurations, including a first intermediate layer that supplies holes and electrons, and a second intermediate layer that reduces current flow and inhibits crosstalk, utilizing inorganic and organic compounds with unpaired electrons and optimized molecular orbitals to lower driving voltage and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional organic EL display manufacturing is used, then light-emitting layers can be formed, but crosstalk between adjacent pixels occurs and power consumption is high
Solution Approach 1:
The light-emitting layer is divided into multiple sub-layers (first light-emitting layer and second light-emitting layer) with different emission characteristics. This segmentation allows each layer to contribute differently to the overall light emission, reducing crosstalk between adjacent pixels while maintaining efficient power utilization
Solution Approach 2:
The patent employs composite material structures where the first light-emitting layer contains host material and first dopant material, while the second light-emitting layer contains host material and second dopant material. This composite approach enables tailored optical and electrical properties that reduce crosstalk and optimize power consumption simultaneously
2Manufacturing precision
If fine metal masks are used in manufacturing, then precise pixel patterns can be formed, but manufacturing complexity and cost increase
Solution Approach 1:
The invention extracts and eliminates the fine metal mask step from the manufacturing process. Instead of using masks to define pixel patterns, the patent forms light-emitting layers as continuous films that are subsequently differentiated through selective processing, thereby removing the complex masking step while maintaining manufacturing precision
Solution Approach 2:
The mechanical masking system is replaced with a chemical/electrical field-based approach where continuous films are processed selectively. This substitution eliminates the need for physical masks and their associated alignment and handling complexities
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 effectively reduces crosstalk and power consumption, enhancing the convenience, usefulness, and reliability of the display apparatus by allowing for reduced current flow and lower driving voltage, while enabling processing without fine metal masks.
Implementation Method 1
The first intermediate layer has a function of supplying a hole to the second unit, and the first intermediate layer has a function of supplying an electron to the first layer
Implementation Method 2
the unpaired electrons are able to be observed at a spin density greater than or equal to 1×10^16 spins/cm³ and less than or equal to 1×10^18 spins/cm³ with an electron spin resonance spectrometer (ESR)
Implementation Method 3
the first organic compound has an unshared electron pair, and the first organic compound interacts with the first inorganic compound to form a singly occupied molecular orbital
Implementation Method 4
The first intermediate layer has a function of supplying a hole to the second unit, and the first intermediate layer has a function of supplying an electron to the first layer
Data Source
AI summary
A novel display apparatus that is highly convenient, useful, or reliable is provided. The display apparatus includes a first light-emitting device and a second light-emitting device, and the second light-emitting device is adjacent to the first light-emitting device. The first light-emitting device includes a first unit emitting light, a second unit emitting light, a first intermediate layer, and a first layer. The first intermediate layer is interposed between the second unit and the first unit. The first layer is interposed between the first intermediate layer and the first unit. In the first layer, unpaired electrons are able to be observed at a spin density greater than or equal to 1×1016 spins/cm3 and less than or equal to 1×1018 spins/cm3. The second light-emitting device includes a third unit emitting light, a fourth unit emitting light, a second intermediate layer, and a second layer. The second intermediate layer is interposed between the fourth unit and the third unit. The second layer is interposed between the second intermediate layer and the third unit. A space is provided between the second intermediate layer and the first intermediate layer. A space is provided between the second layer and the first layer.