Auxiliary Lamp Nesting for High-Pressure Discharge Starting
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Solution Overview
Problem
Conventional light source devices with high-pressure discharge lamps require high voltages for starting, leading to inefficiencies and potential electrical hazards, and existing auxiliary lamps do not effectively improve starting characteristics due to inefficient ultraviolet ray delivery and design constraints.
Innovation Solution
A light source device design featuring a bowl-shaped reflector with a reduced thickness and a current-carrying wire that accommodates an auxiliary lamp's ultraviolet ray emitting space along the side surface of the sealing portion, allowing for improved ultraviolet ray delivery to the high-pressure discharge lamp's electrodes without increasing the device's length or exposing the auxiliary lamp externally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high voltage is applied to start lighting of a high-pressure discharge lamp, then the discharge can be initiated between the main electrodes, but dielectric breakdown may occur in unintended parts leading to electric shock or erroneous operation of electric circuits
Solution Approach 1:
An auxiliary lamp is introduced as an intermediary device that generates ultraviolet rays to irradiate the main electrodes, facilitating discharge initiation without requiring high voltage application between the main electrodes themselves. The auxiliary lamp acts as a mediator that prepares the electrodes for discharge through UV irradiation, thereby enabling starting at lower voltages and avoiding dielectric breakdown hazards
Solution Approach 2:
The auxiliary lamp performs preliminary action by irradiating the main electrodes with ultraviolet rays before the main discharge is initiated. This preliminary UV irradiation activates the electrodes and reduces the voltage required for subsequent discharge, allowing the system to avoid the harmful effects of high voltage application
2Use of energy by moving object
If the thickness of the bottom portion of the reflector is reduced to accommodate the auxiliary lamp, then the ultraviolet ray emitting space can face the sealing portion effectively, but the reflector may become structurally weaker
Solution Approach 1:
The thickness parameter of the reflector's bottom portion is changed from a conventional larger value to a reduced value (3mm to 7mm), optimizing the structure to allow the UV emitting space to face the sealing portion effectively while maintaining sufficient structural strength through careful parameter selection within this range
3Reliability
If the auxiliary lamp is positioned to maximize ultraviolet ray delivery to the electrodes, then the starting characteristics improve, but the device length may increase or the auxiliary lamp may be exposed externally
Solution Approach 1:
The auxiliary lamp is nested within the reflector structure, specifically positioned in the bottom portion of the reflector. This nesting arrangement allows the UV emitting space to face the sealing portion effectively for improved starting characteristics, while the reflector itself serves as the external housing, preventing any external exposure and avoiding an increase in overall device length
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 design enhances the starting properties of high-pressure discharge lamps by increasing ultraviolet ray efficiency and reducing the starting voltage, while maintaining the device's compactness and safety by minimizing external exposure of the auxiliary lamp.
Implementation Method 1
an auxiliary lamp that emits ultraviolet rays for reducing the voltage required to start lighting of the high-pressure discharge lamp
Implementation Method 2
a reflection surface that reflects light from the high-pressure discharge lamp
Implementation Method 3
a high voltage is applied, discharge is caused by dielectric breakdown between the main electrodes, and thereby the light-emitting material is excited to emit light
Data Source
AI summary
[Object] To provide a light source device which allows the lighting starting properties of a high-pressure discharge lamp to be reliably improved without increasing the entire length of the light source device and exposing an auxiliary lamp to the outside.[Solution] A light source device 10 includes: a high-pressure discharge lamp 12; a bowl-shaped reflector 16 having an insertion hole 44 which is formed in a bottom portion 16a and in which a sealing portion 24 is inserted, an inner space 46, and a reflection surface 48 formed on an inner surface thereof; an auxiliary lamp 14 which emits ultraviolet rays UV; and a base 18 having formed therein an accommodation space 52 in which the auxiliary lamp 14 is accommodated between the base 18 and the outer side of the bottom portion 16a. The object can be achieved by setting a thickness t of the bottom portion 16a to be small such that an outer end portion 24a of the sealing portion 24 inserted in the insertion hole 44 projects into the accommodation space 52 of the base 18 and such that the entirety of an ultraviolet ray emitting space 36 of the auxiliary lamp 14 located along the side surface of the sealing portion 24 faces the sealing portion 24 in the accommodation space 52.