Display Apparatus with Aligned Functional Layers for Accurate Light Detection
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Solution Overview
Problem
Current display apparatuses lack high-resolution light detection functionality with high accuracy and low power consumption, necessitating the development of a display apparatus that integrates light-emitting and light-receiving devices with improved structural and material configurations.
Innovation Solution
A display apparatus comprising a light-receiving device with a specific layered structure, including a first electrode, a light-receiving layer, and a common electrode, and a first light-emitting device with a second electrode and a common electrode, where the functional layers are aligned and optimized for hole and electron transport, and an insulating layer is used to enhance the separation and efficiency of light detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a light-receiving device is integrated into the display apparatus, then light detection function is added, but measurement precision and resolution are insufficient
Solution Approach 1:
The light-receiving layer is segmented into multiple functional layers (first functional layer with hole-transport property, second functional layer with electron-transport property, and active layer) with aligned end portions. This segmentation allows each layer to perform its specific function optimally, improving light detection precision while maintaining the integrated structure
Solution Approach 2:
Different functional layers are assigned specific local properties: the first functional layer contains hole-transport materials, the second functional layer contains electron-transport materials, and the active layer is positioned between them. This local quality differentiation enhances the overall light detection accuracy by optimizing charge transport in each region
2Measurement precision
If functional layers are aligned for optimized charge transport, then light detection accuracy improves, but device complexity increases
Solution Approach 1:
The common electrode serves dual functions: it acts as the cathode for the light-emitting device and the anode for the light-receiving device. The insulating layer also serves multiple purposes by contacting side surfaces of both devices and providing electrical isolation. This multi-functionality reduces overall device complexity despite the layered structure
Solution Approach 2:
The light-emitting device and light-receiving device share the common electrode and are integrated within the same encapsulation. The insulating layer is merged into the structure to contact side surfaces of both devices, providing isolation without requiring separate components. This merging approach simplifies the integrated structure
3Measurement precision
If an insulating layer is added to enhance separation, then light detection accuracy improves, but manufacturing complexity increases
Solution Approach 1:
The insulating layer acts as an intermediary element that contacts the side surfaces of both the light-receiving layer and light-emitting layer. It provides electrical isolation and structural support without requiring complex assembly steps, as it can be formed as a continuous layer during the manufacturing process
Solution Approach 2:
The insulating layer is formed preliminarily to contact the side surfaces of the functional layers before final device assembly. This preliminary action ensures proper electrical isolation is in place before subsequent manufacturing steps, simplifying the overall manufacturing process
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 enables a high-resolution display apparatus with accurate light detection and low power consumption, providing a novel display solution that integrates light-emitting and light-receiving functions within a single device, reducing component count and enhancing reliability.
Implementation Method 1
The first functional layer contains a first substance having a hole-transport property
Implementation Method 2
The second functional layer contains a second substance having an electron-transport property
Implementation Method 3
Light-emitting devices (also referred to as EL devices or EL elements) utilizing electroluminescence (EL)
Implementation Method 4
The light-receiving device includes a first electrode, a light-receiving layer, and a common electrode that are stacked in this order
Data Source
AI summary
A display apparatus having a light detection function with high accuracy is to be provide. The display apparatus includes a light-receiving device, a first light-emitting device, and an insulating layer. The light-receiving device includes a first electrode, a light-receiving layer, and a common electrode. The first light-emitting device includes a second electrode, a first EL layer, and the common electrode. The light-receiving layer includes a first functional layer, a second functional layer, and an active layer provided therebetween. The first functional layer contains a first substance having a hole-transport property. The second functional layer contains a second substance having an electron-transport property. An end portion of the active layer, an end portion of the first functional layer, and an end portion of the second functional layer are aligned or substantially aligned with one another. The first EL layer includes a third functional layer, a fourth functional layer, and a first light-emitting layer provided therebetween. The third functional layer contains a third substance having a hole-transport property. The fourth functional layer contains a fourth substance having an electron-transport property. The insulating layer includes regions in contact with a side surface of the light-receiving layer and a side surface of the first EL layer.