Organic Sensor Electrode Signal Multiplexing
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Solution Overview
Problem
Existing detection devices with organic material sensors face challenges in achieving high-definition detection due to small signal changes in response to input light or heat, requiring larger sensor areas and struggling with signal separation from multiple sensors.
Innovation Solution
A detection device with a substrate, an organic material layer, detection electrodes, switching elements, gate lines, signal lines, and a drive circuit that employs code division multiplexing drive to enhance signal intensity and separation without increasing sensor area or voltage, using a gate line drive circuit and signal line selection circuit to select and combine signals from multiple electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the area of each sensor is increased to improve signal output, then detection sensitivity is improved, but definition and resolution deteriorate
Solution Approach 1:
Multiple detection electrodes are electrically connected in parallel to combine their output signals. This merging approach increases the total signal output without requiring any single electrode to be enlarged, thereby maintaining high definition while improving detection sensitivity through signal aggregation from multiple small electrodes.
2Reliability
If the area of each sensor is increased to improve signal output, then signal intensity is improved, but device complexity increases due to larger sensor area requirements
Solution Approach 1:
Multiple detection electrodes are connected in parallel to aggregate their signals, achieving increased signal intensity while keeping each electrode small. This approach avoids the complexity of designing and manufacturing larger sensors while maintaining reliable signal output through collective contribution from multiple electrodes.
3Area of stationary object
If multiple sensors are used to improve detection coverage, then detection area is improved, but signal separation becomes difficult
Solution Approach 1:
The detection area is segmented into multiple independent detection electrodes, each capable of being individually addressed through separate gate lines. This segmentation allows the system to maintain large detection coverage while preserving the ability to selectively activate and measure individual electrodes, thereby achieving effective signal separation through spatial and temporal multiplexing.
Solution Approach 2:
Gate lines are activated in a periodic or sequential manner to select specific detection electrodes for measurement. By controlling which electrodes are active at different time intervals, the system can separate signals from multiple sensors temporally, allowing individual electrode signals to be distinguished even when multiple electrodes exist within the detection area.
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 high-definition light detection with improved signal intensity and reliability, reducing noise and increasing detection accuracy by effectively combining signals from multiple sensors without increasing sensor size or voltage.
Implementation Method 1
a signal output from the detection electrode changes with, for example, the light quantity of light incident on the organic material or a predetermined physical quantity such as temperature
Implementation Method 2
a signal output from the detection electrode changes with, for example, the light quantity of light incident on the organic material or a predetermined physical quantity such as temperature
Data Source
AI summary
Provided are a substrate, an organic material layer provided above the substrate at a position overlapping at least a detection region, a plurality of detection electrodes provided between the substrate and the organic material layer in a direction orthogonal to the substrate, a first switching element provided to each of the detection electrodes, a plurality of gate lines coupled with some first switching elements and extending in a first direction, a plurality of signal lines coupled with some first switching elements and extending in a second direction intersecting the first direction, and a drive circuit configured to supply gate drive signals having potentials determined for the respective gate lines based on a predetermined code to the respective first switching elements through the gate lines.