Shine-through Hydrogen Lamp Insulating Housing Border
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Solution Overview
Problem
Translucent lamps with metallic shielding structures face issues of metal deposits and short circuits due to evaporated electrode material, which compromise their show-through properties and functionality.
Innovation Solution
The border of the metallic housing and the diaphragm opening for a VIS light source are made of electrically insulating materials, such as ceramic or glass ceramic, to prevent deposits and short circuits, with a ceramic screen attached to the metallic housing's rear side to serve as a non-conductive holder for the VIS radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metallic shielding box structure is used in a translucent lamp, then the structural strength and shielding performance are improved, but metal deposits form in front of the through-opening leading to short circuits and loss of show-through properties
Solution Approach 1:
The patent applies local quality by making only the border of the metallic housing and the diaphragm opening electrically insulating (using ceramic or glass ceramic), while the rest of the metallic housing remains conductive. This localized application of insulating material prevents deposits at critical areas without requiring complete ceramic construction, thus maintaining structural strength while preventing short circuits.
Solution Approach 2:
The patent introduces an electrically insulating material (ceramic or glass ceramic) as an intermediary between the metallic housing and the electrode material deposits. This intermediary layer prevents direct contact between conductive metal surfaces and evaporated electrode material, eliminating the short circuit pathway while allowing the metallic housing to maintain its structural and shielding functions.
2Reliability
If ceramic structures are used throughout the housing to prevent short circuits, then electrical insulation is improved, but the device complexity and susceptibility to electrode material deposits increase
Solution Approach 1:
The patent avoids complete ceramic construction by applying electrically insulating material only where necessary - specifically at the border of the metallic housing and the diaphragm opening. This selective approach provides sufficient electrical insulation to prevent short circuits while minimizing the complexity associated with full ceramic housing construction.
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 solution maintains the lamp's show-through properties while preventing short circuits and metal deposits, ensuring continuous UV and VIS spectra for analytical purposes without additional ceramic structures susceptible to electrode material deposits.
Implementation Method 1
metal deposits in the lamp envelope in front of the visible light passage opening
Implementation Method 2
Deposits of evaporated electrode material can lead to short circuits
Implementation Method 3
An electrically insulating screen for the incident visible light is thus provided on the side of the metallic housing structure
Implementation Method 4
a discharge space delimited by a metal housing structure within a closed lamp bulb
Implementation Method 5
diaphragm opening for constricting the arc discharge generated between the electrodes
Implementation Method 6
a halogen lamp is arranged behind the deuterium lamp in such a way that its light falls through the two holes in the deuterium lamp electrodes and supplements the continuous UV spectrum
Data Source
Figure 1~3
Figure 4
AI summary
In a shine-through low-pressure discharge hydrogen lamp with a metallic housing structure shielding the discharge space in a lamp bulb filled with hydrogen, according to the invention a shield (4) made from an electrically insulating material is fastened in the metallic housing part (2) which is to be pointed towards a visible light source.