Photoelectric Detection Element Layout for Aperture and Position Accuracy
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Solution Overview
Problem
Optical detection devices face a challenge in maintaining positional accuracy while increasing the aperture ratio, as existing configurations that enhance the aperture ratio often result in uneven arrangement pitches for photoelectric conversion elements and transistors, leading to decreased detection precision.
Innovation Solution
The detection device incorporates a substrate with photoelectric conversion elements and transistors, where signal lines are arranged between adjacent elements in a specific configuration to maintain equal arrangement pitches and share signal lines between detection elements, enhancing the aperture ratio without compromising positional accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal lines are shared between adjacent pixels as described in JP-A-2010-187022, then the aperture ratio is increased, but the arrangement pitch of photoelectric conversion elements becomes non-constant, decreasing positional accuracy
Solution Approach 1:
The invention divides the signal line configuration into separate dedicated lines for each photoelectric conversion element, rather than sharing signal lines between adjacent elements. This segmentation allows each element to maintain its own dedicated signal path, ensuring constant arrangement pitch while still achieving high aperture ratio through optimized spatial layout of the photoelectric conversion elements themselves.
Solution Approach 2:
The invention applies different configuration strategies to different spatial regions: photoelectric conversion elements are arranged with constant pitch to maintain positional accuracy, while signal lines are routed through optimized paths that maximize the light-receiving area. This local differentiation allows simultaneous optimization of both positional accuracy and aperture ratio.
2Manufacturing precision
If photoelectric conversion elements are arranged at constant pitch for high positional accuracy, then the aperture ratio is reduced due to space required for transistors and signal lines
Solution Approach 1:
The invention optimizes the spatial arrangement by utilizing three-dimensional layout strategies. Signal lines and transistors are positioned in regions that do not interfere with the constant-pitch arrangement of photoelectric conversion elements, effectively using available space in multiple dimensions. This allows the photoelectric conversion elements to maintain constant pitch for high positional accuracy while maximizing the overall aperture ratio of the device.
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 configuration improves the aperture ratio by approximately 15% compared to traditional designs while maintaining consistent arrangement pitches, thus restraining the reduction in positional accuracy.
Implementation Method 1
a plurality of photoelectric conversion elements provided to the substrate and each including a semiconductor layer having a photovoltaic effect
Data Source
AI summary
A detection device includes: a substrate; photoelectric conversion elements provided to the substrate; transistors; and signal lines each of which is between adjacent photoelectric conversion elements. Each detection element includes one of the photoelectric conversion element and the transistors adjacent to the photoelectric conversion element. A first signal line among the signal lines is between the photoelectric conversion element of a first detection element and the photoelectric conversion element of a second detection element adjacent to one side of the first detection element and is coupled to the first detection element and the second detection element. A second signal line among the signal lines is between the photoelectric conversion element of the first detection element and the photoelectric conversion element of a third detection element adjacent to another side of the first detection element and is coupled to the first detection element and the third detection element.