Constant Potential Wire for Pixel Repair Stability
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Solution Overview
Problem
In detection apparatuses with non-separated semiconductor layers for each pixel, repairing a defective pixel can lead to failure in adjacent normal pixels due to carrier movement, causing unintended electric signals and potential gradients that affect image quality.
Innovation Solution
The detection apparatus includes a constant potential wire connected to a first electrode of some pixels, which is electrically connected to the constant potential wire to prevent unintended potential fluctuations and maintain a stable potential, thereby preventing failure in adjacent normal pixels during the repair process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a laser repair technique is used to cut off the connection between the drain electrode or source electrode of a TFT and a signal wire, then the defective pixel can be electrically separated from the signal wire, but carrier movement through the shared semiconductor layer causes failure in adjacent normal pixels
Solution Approach 1:
The semiconductor layer is divided into pixel-specific regions through isolation structures (such as oxide semiconductor layers or insulating layers) that separate the semiconductor layers of adjacent pixels. This segmentation prevents carrier movement between pixels, allowing defective pixel repair without affecting normal pixels. The isolation structures create electrical boundaries that confine carriers within their respective pixel regions.
Solution Approach 2:
An intermediary isolation layer (oxide semiconductor layer or insulating layer) is introduced between the semiconductor layers of adjacent pixels. This intermediary structure acts as a barrier that blocks carrier movement while allowing the laser repair process to proceed on defective pixels without causing failures in normal pixels.
2Measurement precision
If the semiconductor layer is not separated for each pixel to improve aperture ratio, then the conversion element sensitivity is improved, but repair of defective pixels causes carrier movement that generates unintended electric signals in normal pixels
Solution Approach 1:
The semiconductor layer is segmented into pixel-specific regions using isolation structures that prevent carrier movement between pixels. This segmentation maintains the non-separated semiconductor layer configuration for high aperture ratio and sensitivity while preventing the harmful effect of carrier movement causing unintended electric signals in normal pixels during repair.
Solution Approach 2:
Different regions of the semiconductor layer are given different properties: the pixel regions maintain continuous semiconductor for high sensitivity and aperture ratio, while the boundary regions between pixels are isolated using oxide semiconductor layers or insulating layers to prevent carrier movement. This local differentiation allows simultaneous achievement of high sensitivity and prevention of harmful carrier movement.
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 solution ensures that normal pixels remain functional even after repairing a defective pixel by maintaining a stable potential and preventing excessive bias, thus ensuring accurate and reliable image data acquisition.
Implementation Method 1
the first electrode is electrically connected to the constant potential wire
Data Source
AI summary
A detection apparatus includes a plurality of pixels and a plurality of signal wires arranged on a substrate, in which each of the plurality of pixels includes a switch element arranged on the substrate and a conversion element arranged on the switch element, the conversion element includes a first electrode which is arranged on the switch element and electrically connected to the switch element and a semiconductor layer arranged over a plurality of the first electrodes, and a plurality of the switch elements is electrically connected to the plurality of signal wires, and the detection apparatus further includes a constant potential wire which is supplied with a constant potential, in which the first electrode is electrically connected to the constant potential wire in apart of pixels among the plurality of pixels.