Array Substrate Shared Switch Unit for Light Detection and Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current array substrates with integrated light detecting units have complex structures due to multiple thin film transistors (TFTs), leading to low pixel filling rates and detection resolutions, as the light emitting and detecting units are independently controlled by separate TFTs in each pixel region.
Innovation Solution
The array substrate design shares a switch unit between the light detecting and emitting units, reducing the number of TFTs and simplifying the structure, with the switch unit being insulated from the light detecting unit and electrically connected to the light emitting unit, allowing for efficient light detection and emission control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate TFTs are used to independently control light emitting and detecting units in each pixel region, then the light detection and emission can be independently controlled, but the structure becomes complex and the pixel filling rate decreases
Solution Approach 1:
The patent merges the control functions by sharing a single switch unit between the light emitting unit and light detecting unit. The switch unit is positioned to electrically connect to both units, allowing one transistor to control both functions instead of requiring separate transistors for each unit, thereby simplifying the structure while maintaining operational control.
Solution Approach 2:
The switch unit is designed to serve multiple functions by simultaneously controlling both the light emitting unit and the light detecting unit. This multi-functional switch unit replaces what would traditionally require two separate control transistors, reducing device complexity while preserving the ability to control both emission and detection operations.
2Ease of operation
If separate TFTs are used to independently control light emitting and detecting units in each pixel region, then the light detection and emission can be independently controlled, but the pixel filling rate decreases
Solution Approach 1:
The patent merges the control functions by sharing a single switch unit between the light emitting unit and light detecting unit. The switch unit is positioned to electrically connect to both units, allowing one transistor to control both functions instead of requiring separate transistors for each unit, thereby simplifying the structure while maintaining operational control.
Solution Approach 2:
The switch unit is designed to serve multiple functions by simultaneously controlling both the light emitting unit and the light detecting unit. This multi-functional switch unit replaces what would traditionally require two separate control transistors, reducing device complexity while preserving the ability to control both emission and detection operations.
3Area of moving object
If the switch unit is positioned to overlap with the light detecting unit projection, then the occupied area is reduced and pixel filling rate increases, but the insulation and electrical connection requirements become more challenging
Solution Approach 1:
The patent resolves the spatial conflict by transitioning to a three-dimensional arrangement where the switch unit is positioned at a different vertical level (height dimension) relative to the light detecting unit. This vertical stacking allows the orthographic projections to overlap in the planar view while maintaining physical separation through insulation layers, thus reducing occupied area without compromising electrical isolation.
Solution Approach 2:
The patent introduces an insulating layer as an intermediary element between the switch unit and the light detecting unit. This insulating layer enables the switch unit to be positioned in close proximity or overlapping projection with the light detecting unit while maintaining necessary electrical insulation, thus allowing area reduction without sacrificing isolation requirements.
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 design enhances pixel filling rates and detection resolution by reducing the occupied area of the switch unit in the pixel region, enabling high-resolution light detection and emission control, with the switch unit operating in the ON transition region to determine illumination intensity.
Implementation Method 1
applying a voltage to the first electrode of the light detecting unit, so that the second electrode of the light detecting unit has a potential, where the potential of the second electrode changes under the action of the light irradiated to the first electrode, causing an output current of the switch unit to change
Data Source
AI summary
An array substrate and a method for manufacturing the same, a method and assembly for detecting light, and a display device are provided. The array substrate includes: a base substrate having a pixel region; a light detecting unit, a switch unit, and a light emitting unit that are located in the pixel region, where the light emitting unit and the light detecting unit share the switch unit.