Display Device Light Detection Integration
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Solution Overview
Problem
Existing display devices lack a built-in light detection function, which limits their convenience, functionality, and manufacturing efficiency.
Innovation Solution
A display device incorporating a light-receiving element and multiple light-emitting elements, where the light-receiving element includes a pixel electrode, an active layer with an organic compound, and a common electrode, and the light-emitting elements share common layers to reduce the number of manufacturing steps and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a light-receiving element is added to the display device, then light detection function is achieved, but device complexity increases
Solution Approach 1:
The patent merges the light-receiving element with the existing display structure by using the same pixel electrode, active layer, and common electrode components. The light-receiving element is formed in the same pixel structure as the light-emitting elements, allowing it to share common components and reducing overall device complexity despite adding light detection functionality.
Solution Approach 2:
The pixel structure is designed to serve multiple functions: the same pixel electrode, active layer, and common electrode are used for both light emission and light detection. This multi-functional design allows a single structural unit to perform both display and sensing operations, reducing the need for separate dedicated components.
2Adaptability or versatility
If separate manufacturing processes are used for light-receiving and light-emitting elements, then functional integration is achieved, but manufacturing cost and steps increase
Solution Approach 1:
The manufacturing process merges the fabrication of light-receiving and light-emitting elements into a single integrated process. The same pixel electrode, active layer, and common electrode are formed simultaneously for both element types, reducing the number of manufacturing steps and processes required.
Solution Approach 2:
The universal structure allows a single manufacturing process to produce both light-receiving and light-emitting elements. The common components are fabricated once and serve dual purposes, eliminating the need for separate dedicated manufacturing sequences and reducing overall production complexity.
3Ease of manufacture
If the light-receiving element shares common layers with light-emitting elements, then manufacturing cost is reduced, but light detection performance may be compromised
Solution Approach 1:
While sharing common layers, the patent introduces local quality differences through the organic compound in the active layer. The organic compound provides light-receiving functionality specific to the light-receiving element, allowing it to detect light while the common layers provide structural and electrical functionality shared with light-emitting elements.
Solution Approach 2:
The light-receiving element uses a composite structure combining the common inorganic layers (pixel electrode, active layer with organic compound, common electrode) with the light-emitting element's light-emitting layer. This composite approach allows the light-receiving element to benefit from both the shared common layers and the specialized organic light-receiving material.
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 display device achieves a high aperture ratio, high definition, and multifunctionality, while improving manufacturing yield and reducing costs by integrating light detection and emission functions.
Implementation Method 1
a light-receiving element (110) having a function of sensing light
Implementation Method 2
Light-emitting elements (also referred to as EL elements) utilizing an electroluminescence (hereinafter referred to as EL) phenomenon
Data Source
AI summary
A display device having a light detection function is provided. A highly convenient display device is provided. The display device includes a light-receiving element, a first light-emitting element, and a second light-emitting element in a display portion. The light-receiving element includes a first pixel electrode, an active layer, and a common electrode. The first light-emitting element includes a second pixel electrode, a first light-emitting layer, and the common electrode. The second light-emitting element includes a third pixel electrode, a second light-emitting layer, and the common electrode. The active layer includes an organic compound. The active layer is positioned between the first pixel electrode and the common electrode. The first light-emitting layer is positioned between the second pixel electrode and the common electrode. The second light-emitting layer is positioned between the third pixel electrode and the common electrode. The first light-emitting layer is further positioned between the first pixel electrode and the common electrode and/or between the third pixel electrode and the common electrode.