Light Source Apparatus PWM Control Segmentation
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Solution Overview
Problem
The complexity of adjusting semiconductor light sources in endoscope systems for accurate current control and PWM modulation necessitates extensive calibration, complicating the manufacturing process and requiring detailed data storage, which is time-consuming and labor-intensive.
Innovation Solution
A light source apparatus with a first and second light source section capable of pulse emission, where the light source control section adjusts pulse emission time and intensity, allowing for alternation and calibration to maximize image brightness without the need for intricate calibration procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current control and PWM control are performed with high accuracy on semiconductor light sources, then light modulation precision is improved, but adjustment work complexity increases
Solution Approach 1:
The patent divides the light source system into multiple independent light source sections (first light source section and second light source section), each with its own control characteristics. This segmentation allows different control strategies to be applied to different sections, simplifying the overall adjustment process while maintaining high light modulation precision for each section.
Solution Approach 2:
The patent changes the control parameters by fixing one parameter (pulse emission intensity of second light) and varying another parameter (pulse emission time of second light). This parameter change strategy reduces the dimensional space of adjustment needed, thereby simplifying the adjustment work while maintaining accurate light modulation capability.
2Manufacturing precision
If adjustment work is performed on all semiconductor light sources, then manufacturing precision is improved, but productivity decreases
Solution Approach 1:
By segmenting the light sources into first and second light source sections with different control characteristics, the patent enables selective adjustment strategies. Not all light sources require the same level of adjustment, thus improving productivity while maintaining necessary manufacturing precision for each type.
Solution Approach 2:
The patent applies partial adjustment action by fixing the pulse emission intensity of the second light source and only adjusting its pulse emission time. This partial adjustment approach achieves sufficient calibration accuracy without performing exhaustive adjustment on all parameters of all light sources, thereby improving productivity.
3Adaptability or versatility
If pulse emission time and pulse emission intensity of both light sources are controlled independently, then light modulation flexibility is improved, but device complexity increases
Solution Approach 1:
The patent segments the control system into distinct control modes for first and second light source sections. The first light source allows independent control of both parameters, while the second light source uses a simplified control mode with one fixed parameter. This segmentation maintains flexibility where needed while reducing complexity where possible.
Solution Approach 2:
The patent implements dynamic control where the control strategy adapts based on the light source type. The light source control section dynamically selects whether to control both parameters independently (first light source) or fix one parameter and control the other (second light source), thereby maintaining flexibility while managing complexity.
Data Source
AI summary
A light source apparatus, a medical observation system, an adjustment apparatus, an illumination method, an adjustment method, and a program that enable performing light modulation on a semiconductor light source through PWM control and current control without the necessary of a complicated work are provided. A light source apparatus 3 includes a first light source section 31 that emits a first light, a second light source section 32 that emits a second light, and a light source control section 33 that controls each of a pulse emission time and a pulse emission intensity of the first light and performs a control that changes one of a pulse emission time and a pulse emission intensity of the second light with the other one of the pulse emission time and the pulse emission intensity of the second light fixed.