Light Emitter Gate Voltage Control for Fast Stabilization
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Solution Overview
Problem
The existing light emitting thyristor configurations face challenges in stabilizing the amount of light emitted, with parasitic capacitance increasing the time required to achieve stable light output after lighting.
Innovation Solution
A light emitter configuration with plural light emitting thyristors connected in parallel between a reference voltage line and a lighting voltage line, featuring a gate voltage setting section that sets the gate voltage of each thyristor to a voltage between the lighting start voltage and the on-state voltage when transitioning from an off-state to an on-state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If light emitting thyristors are connected in parallel to control light amount by lighting time period, then light control capability is improved, but the time required to stabilize light output increases due to parasitic capacitance
Solution Approach 1:
The gate voltage setting section pre-charges the parasitic capacitance of the light emitting thyristors to a voltage between the lighting start voltage and on-state voltage before lighting is initiated. This preliminary action reduces the time required for the capacitance to charge during lighting, thereby decreasing the stabilization time of light output while maintaining the parallel connection configuration for light control.
2Loss of time
If gate voltage is set to a voltage between lighting start voltage and on-state voltage, then the time to stabilize light output is reduced, but additional circuit complexity is introduced
Solution Approach 1:
A gate voltage setting section is introduced as an intermediary component between the power supply and the gates of the light emitting thyristors. This section specifically manages the charging of parasitic capacitance by setting the gate voltage to an intermediate value, achieving faster light stabilization without requiring fundamental changes to the parallel connection architecture.
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 reduces the time needed to stabilize light emission from light emitting thyristors, improving the efficiency and speed of light stabilization compared to configurations without gate voltage changes.
Implementation Method 1
plural light emitting thyristors that each have an anode, a cathode, and a gate and are connected in parallel between a reference voltage line to which a reference voltage is supplied and a lighting voltage line to which a lighting start voltage for starting lighting is supplied
Data Source
AI summary
A light emitter includes: plural light emitting thyristors that each have an anode, a cathode, and a gate and are connected in parallel between a reference voltage line to which a reference voltage is supplied and a lighting voltage line to which a lighting start voltage for starting lighting is supplied, in which the anode and the cathode are connected respectively to the reference voltage line and the lighting voltage line; and a gate voltage setting section that, when at least one of the plural light emitting thyristors transitions from an off-state to an on-state, sets a voltage on the gate of each of the plural light emitting thyristors to a voltage between the lighting start voltage and an on-state voltage of the light emitting thyristor.