Light Detecting Array Structure Eliminates Selector Switches
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Solution Overview
Problem
Conventional light detecting arrays require additional selector switches, increasing manufacturing complexity, cost, and reducing production yield due to the need for independent reading of specific detectors.
Innovation Solution
A light detecting array structure with intersecting first and second electrodes, including carrier selective layers and a light-absorbing active layer, where a control unit applies cross voltages to read photocurrents, eliminating the need for external selector switches by utilizing the electrodes' intersections to form pixels and manage photocurrent flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If additional selector switches are used to independently read specific detectors, then the ability to read specific photo-sensors is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the selector switch functionality into the photo-sensor array structure itself by using conductive layers and electrode patterns that can be selectively activated. The conductive layer is integrated with the photo-sensor active layer, creating a unified structure where selection is achieved through electrical addressing of specific electrode intersections rather than separate external switches.
Solution Approach 2:
The conductive layer serves multiple functions simultaneously: it acts as both the photo-sensor active layer and the selection mechanism. By patterning the conductive layer with specific electrode configurations, the same structure enables both light detection and selective reading of individual photo-sensors without requiring separate components.
2Ease of operation
If additional selector switches are used to independently read specific detectors, then the ability to read specific photo-sensors is improved, but manufacturing cost and time increase
Solution Approach 1:
The patent merges the selector switch functionality into the photo-sensor array structure itself by using conductive layers and electrode patterns that can be selectively activated. The conductive layer is integrated with the photo-sensor active layer, creating a unified structure where selection is achieved through electrical addressing of specific electrode intersections rather than separate external switches.
Solution Approach 2:
The conductive layer serves multiple functions simultaneously: it acts as both the photo-sensor active layer and the selection mechanism. By patterning the conductive layer with specific electrode configurations, the same structure enables both light detection and selective reading of individual photo-sensors without requiring separate components.
3Ease of operation
If additional selector switches are used to independently read specific detectors, then the ability to read specific photo-sensors is improved, but production yield decreases
Solution Approach 1:
The patent merges the selector switch functionality into the photo-sensor array structure itself by using conductive layers and electrode patterns that can be selectively activated. The conductive layer is integrated with the photo-sensor active layer, creating a unified structure where selection is achieved through electrical addressing of specific electrode intersections rather than separate external switches.
Solution Approach 2:
The conductive layer serves multiple functions simultaneously: it acts as both the photo-sensor active layer and the selection mechanism. By patterning the conductive layer with specific electrode configurations, the same structure enables both light detection and selective reading of individual photo-sensors without requiring separate components.
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
Simplifies the manufacturing process, improves yield and cost efficiency by integrating the functionality of selector switches within the electrode structure, allowing for independent reading of photocurrents at each pixel without additional components.
Implementation Method 1
a light-absorbing active layer is disposed between the first carrier selective layer and the second carrier selective layer
Data Source
AI summary
A light detecting array structure and a light detecting module are provided. The light detecting array structure includes a plurality of first electrodes, a plurality of second electrodes, a first carrier selective layer, a second carrier selective layer, and a light-absorbing active layer. The second electrodes are disposed on one side of the first electrodes. Between the first electrodes and the second electrodes, a first carrier selective layer, a light-absorbing active layer and a second carrier selective layer are disposed. The light detecting module includes the light detecting array structure and a control unit. The control unit is coupled to the first electrodes and second electrodes, selectively provides at least two cross voltages between each of the first electrodes and each of the second electrodes, and reads photocurrents flowing through the first electrodes and second electrodes.