Lamp Device Trigger Line Routing to Suppress Light Shielding
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Solution Overview
Problem
The existing lamp devices with trigger lines, designed to improve turn-on characteristics, often act as light-shielding materials, reducing the amount of irradiated light due to their wiring configuration.
Innovation Solution
The lamp device incorporates a ring-like trigger line that is wound around the sealing portion fastened to the principal reflection mirror, with a wiring path that avoids contact with the bulb portion and extends along the sealing portion to the sub-mirror, minimizing the light-shielding area by being placed in regions where light does not extend through, and using a heat-resistant conductive wire with a diameter of 0.3 mm or less.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a trigger line is disposed to improve the turn-on characteristics of the arc tube, then the turn-on characteristics are improved, but the trigger line acts as a light-shielding member to reduce the amount of irradiation light
Solution Approach 1:
The trigger line is configured with a ring-like portion wound around the sealing portion and a second portion extending along the sealing portion, creating a three-dimensional wiring path that avoids the light propagation path. This spatial arrangement in multiple dimensions allows the trigger line to maintain its electrical function while minimizing light shielding.
Solution Approach 2:
The trigger line wiring path is specifically designed to pass through regions where light does not extend through, such as along the sealing portion and through the neighborhood of the bulb portion. This localized routing strategy ensures that the trigger line only occupies spaces where it does not interfere with light transmission.
2Illumination intensity
If the trigger line is wound around the sealing portion and extends along the sealing portion, then the light-shielding area is minimized, but the wiring complexity increases
Solution Approach 1:
The trigger line is divided into two distinct portions: a ring-like portion wound around the sealing portion and a second portion extending along the sealing portion to the lead. This segmentation allows each portion to be optimized for its specific function while simplifying the overall wiring configuration.
Solution Approach 2:
Instead of routing the trigger line through the bulb portion or other conventional paths, the wiring is inverted to extend along the sealing portion. This reverse routing approach simplifies the wiring path by utilizing the existing structural space of the sealing portion rather than creating additional complex routing paths.
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 effectively suppresses the decrease in irradiated light while maintaining improved turn-on characteristics by minimizing the light-shielding effect of the trigger line, ensuring that the trigger line does not enter regions where light extends through, thereby enhancing the usability of light.
Implementation Method 1
a sub-mirror that is fastened to the other of the pair of sealing portions and returns light exited from the bulb portion toward the principal reflection mirror
Implementation Method 2
a principal reflection mirror that fastens to one of the pair of sealing portions and reflects light exited from the arc tube toward a region that is illuminated
Data Source
AI summary
In a lamp device provided with an arc tube, a principal reflection mirror, and a sub-mirror; a decrease in illumination light, caused by a trigger line disposed to improve the turn-on characteristics of the arc tube, being suppressed. The lamp device include an arc tube having a bulb portion that incorporates electrodes and sealing portions; a principal reflection mirror; a sub-mirror; leads connected to an electrode at an end portion of each of the sealing portions; and a trigger line. The trigger line has a ring-like portion wound around the sealing portion. The trigger line extends from the ring-like portion and has a wiring path that passes a neighborhood of the bulb portion without coming into contact with the bulb portion, further extends along the sealing portion and is connected to the lead. The wiring path is in the same plane that extends through an optical axis.