Discharge Lamp Lighting Device Voltage Feedback Control
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Solution Overview
Problem
Existing discharge lamp lighting devices face challenges in accurately controlling the brightness due to rapid changes in drive voltage, leading to discrepancies between target and actual electric current values.
Innovation Solution
A discharge lamp lighting device with a control section that performs first and second control processes based on detected drive voltage, allowing for precise adjustment of electric power supplied to the lamp, ensuring accurate brightness control by stabilizing the drive voltage during each process period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electric power for driving the discharge lamp is changed in a short time, then the lighting power for each color segment can be adjusted, but a difference occurs between target electric current value and actual electric current value, making it difficult to control brightness with high accuracy
Solution Approach 1:
The control section detects the drive voltage of the discharge lamp and uses this feedback information to adjust the electric power supply. By continuously monitoring the actual drive voltage and comparing it with the target voltage, the system can correct deviations in electric current values and maintain accurate brightness control even when power levels are changed rapidly between color segments.
Solution Approach 2:
The system dynamically adjusts the electric power supplied to the discharge lamp based on real-time drive voltage detection. The control section modifies power delivery in response to changing conditions, enabling accurate brightness control during rapid transitions between different lighting power levels for color segments.
2Measurement precision
If the drive voltage of the discharge lamp is detected during each control process period, then the electric power can be controlled with high accuracy, but the control system complexity increases
Solution Approach 1:
The control section performs multiple functions using a single integrated unit: it controls the discharge lamp drive section, detects the drive voltage, processes detection results, and adjusts electric power supply. This multi-functional approach achieves high-precision electric power control without requiring separate dedicated components for each function, thereby limiting the increase in overall system complexity.
Solution Approach 2:
The voltage detecting section and control section are integrated into a unified control system that combines detection and control functions. By merging these functions into a coordinated system rather than separate independent systems, the patent achieves accurate electric power control based on real-time voltage detection while managing system complexity through functional integration.
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
Enables high-accuracy control of the discharge lamp's brightness by continuously monitoring and adjusting the drive voltage, thereby maintaining stable electric current values and improving overall lighting performance.
Implementation Method 1
a voltage detecting section which detects a drive voltage of the discharge lamp
Implementation Method 2
A projector which uses a discharge lamp such as a high pressure mercury lamp or a metal halide lamp
Data Source
AI summary
A discharge lamp lighting device includes: a discharge lamp drive section which supplies electric power to a discharge lamp; a voltage detecting section which detects drive voltage of the discharge lamp; and a control section which controls the discharge lamp drive section, wherein the control section performs a first control process of controlling the discharge lamp drive section so that the electric power supplied to the discharge lamp is a first power based on the drive voltage detected by the voltage detecting section during a period when the first control process is previously performed, and a second control process of controlling the discharge lamp drive section so that the electric power supplied to the discharge lamp is a second power different from the first power based on the drive voltage detected by the voltage detecting section during a period when the second control process is previously performed.