Photoelectric Conversion Device Current Consumption Circuit
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Solution Overview
Problem
Existing photoelectric conversion devices experience variations in current consumption between standby and operational states, leading to potential noise in optical signals due to variations in the current supply line's voltage, which degrade the signal-to-noise ratio.
Innovation Solution
A photoelectric conversion device with a current consumption circuit that adjusts current consumption to minimize the difference between standby and operational periods, reducing noise by maintaining consistent current consumption during these periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the column circuits operate in the first state to output signals, then the signal output function is improved, but the current consumption increases compared to the standby state
Solution Approach 1:
The patent applies dynamics by making the current consumption circuit adjustable rather than fixed. The circuit dynamically changes its current consumption level based on the operational state of the column circuits, transitioning between different current consumption levels to match the operational requirements of the system.
Solution Approach 2:
The patent changes the parameter of current consumption by introducing a current consumption circuit that can operate at different current levels. By changing the current consumption parameter of the circuit, the system can match the power requirements of the column circuits in different states (first state with high current consumption for signal output, second state with low current consumption for standby).
2Loss of energy
If the current consumption differs between standby and operational states, then the device can enter low-power standby mode, but the potential of the current supply line varies causing noise in the optical signal
Solution Approach 1:
The patent implements feedback by having the current consumption circuit respond to the operational state of the column circuits. The circuit detects whether the column circuits are in the first state (operational) or second state (standby) and adjusts its current consumption accordingly, creating a feedback loop that maintains stable supply line potential while enabling power savings.
Solution Approach 2:
The patent applies equipotentiality by ensuring that the current supply line maintains a stable potential regardless of the operational state. By making the current consumption circuit's current consumption match the column circuits' current consumption in both states, the system eliminates potential variations in the supply line, thereby reducing noise in the optical signal while still allowing for power savings in standby mode.
3Measurement precision
If the current consumption circuit consumes current to reduce potential variation, then the signal-to-noise ratio is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing the current consumption circuit to serve multiple functions: it provides current consumption matching for both the first state (operational) and second state (standby) of the column circuits. This multi-functional circuit reduces potential variations and improves signal-to-noise ratio without requiring separate circuits for each state, thereby limiting the increase in device complexity.
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 effectively reduces noise in the output signal by stabilizing the current supply line's voltage, thereby enhancing the signal-to-noise ratio and improving the accuracy of optical signal output.
Implementation Method 1
a plurality of photoelectric conversion units configured to generate optical signals by performing photoelectric conversion of incident light
Data Source
AI summary
A photoelectric conversion device includes a current consumption circuit configured to consume current such that a difference between a current consumption during a blanking period and a current consumption during a standby period is reduced.