Image Sensor Segmentation for High Resolution Exposure
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Solution Overview
Problem
Existing image sensing devices face a challenge in maintaining exposure time when increasing Y-axis resolution, leading to insufficient exposure capacity and reduced scan quality.
Innovation Solution
The image sensing device accumulates exposure capacity by using multiple red, green, and blue light sensing units, storing and summing exposure capacities over multiple exposure times to enhance Y-axis resolution without altering motor speed or light source brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the Y-axis resolution is increased to 600 dpi, then the scan quality is improved, but the exposure time is halved making the exposure capacity insufficient
Solution Approach 1:
The patent divides the sensing process into multiple segments by using N red light sensing units, N green light sensing units, and N blue light sensing units that sequentially sense different scan lines. Each sensing unit captures a portion of the image, and the control circuit accumulates exposure capacities from all segments to reconstruct the complete image with sufficient exposure capacity despite reduced individual exposure time
Solution Approach 2:
The control circuit performs preliminary accumulation of exposure capacities from multiple sensing units before final image reconstruction. By pre-storing and summing the exposure capacities Qi to QN in a register, the system ensures that the total exposure capacity remains sufficient even though each individual sensing operation uses halved exposure time
2Speed
If the number of scan lines per page is doubled to maintain scan speed at 600 dpi, then the scan speed is maintained, but the exposure time per scan line is halved
Solution Approach 1:
The patent maintains continuous useful action by having N sensing units operate in sequence rather than requiring the single sensing unit to process all scan lines. While one sensing unit is exposed, others are being positioned or processed, ensuring that the overall scanning process continues without interruption despite reduced exposure time per line
Solution Approach 2:
The scanning process is segmented into N parallel operations where each sensing unit handles a portion of the scan lines. This segmentation allows the system to process more scan lines per page while maintaining adequate exposure capacity through the accumulation of signals from multiple segmented sensing operations
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 approach effectively doubles the number of scan lines per inch, increasing Y-axis resolution and exposure capacity, while maintaining scan speed and quality, without requiring motor upgrades or increased light source brightness.
Implementation Method 1
N red light sensing units, N green light sensing units, N blue light sensing units... sequentially senses the scan lines to correspondingly output pleural analog signals
Data Source
AI summary
An image sensing device includes N red light sensing units, N green light sensing units, N blue light sensing units and a control circuit. The control circuit accumulates an exposure capacity Qi generated by the ith red light sensing unit, green light sensing unit, and blue light sensing unit in an exposure time Ti and an exposure capacity Qi+1 generated by the (i+1)th red light sensing unit, green light sensing unit, and blue light sensing unit in next exposure time Ti+1 until an exposure capacity QN generated in the TNth exposure time is accumulated, wherein i is an integer ranging from 1 to N. The exposure capacities Qi to QN are sequentially stored in a register and outputted from the control circuit, so that the image of each scan line can be sequentially transferred to an analog signal with the sum of the exposure capacities Qi to QN.