Compact Light Source Unit with Polished Reflector
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Solution Overview
Problem
Conventional light source units in projector systems require a larger size to maintain sufficient light output, leading to increased projector system size and portability issues due to light loss from the bulb's reflection on electrode introducing portions and inadequate illumination of the mirror tunnel.
Innovation Solution
A light source unit with a reflector having a polished internal surface and a condenser lens with a recessed portion, where the bulb is positioned to direct the focal point between the electrode introducing portion and the condenser, ensuring efficient light gathering and reducing light loss by avoiding reflection on the electrode introducing portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the light source unit is made smaller, then the projector system size is reduced and portability is improved, but light loss occurs from reflection on the electrode introducing portion and the mirror tunnel cannot be sufficiently illuminated
Solution Approach 1:
The patent changes the position parameter of the bulb within the reflector, specifically positioning it so that the focal point of reflected light falls between the electrode introducing portion and the light gathering surface of the condenser, rather than on the electrode introducing portion itself. This parameter adjustment optimizes light collection efficiency while maintaining a compact light source unit design.
2Illumination intensity
If the lamp size is increased to secure necessary light quantity, then light output is sufficient, but the projector system becomes larger and less portable
Solution Approach 1:
The patent optimizes the position parameter of the bulb to achieve maximum light collection efficiency with a smaller lamp size. By positioning the focal point appropriately relative to the condenser's light gathering surface, the system achieves sufficient illumination intensity without requiring a larger lamp, thus maintaining compact projector system dimensions.
Solution Approach 2:
The condenser acts as an intermediary optical element that efficiently collects and concentrates light from the compact bulb arrangement. The condenser's light gathering surface is positioned to receive reflected light from the reflector, mediating between the light source and the mirror tunnel to ensure sufficient illumination without requiring a large lamp size.
3Device complexity
If the bulb is positioned with focal point on the electrode introducing portion, then the structure is simplified, but light quantity is dampened due to reflection on the electrode introducing portion
Solution Approach 1:
The patent adjusts the position parameter of the bulb to place the focal point of reflected light between the electrode introducing portion and the condenser's light gathering surface. This parameter change prevents light from reflecting off the electrode introducing portion, thereby maintaining light quantity while keeping the structural configuration relatively simple.
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 enhances light utilization efficiency and allows for a smaller light source unit and projector system size without compromising light output, improving portability and usability.
Implementation Method 1
a reflector whose internal surface is planished to provide a mirror reflection effect
Implementation Method 2
a condenser which lies on an optical axis of the light radiated from the lamp and which is adapted to gather the light that is radiated from the lamp and that is reflected on the reflector
Data Source
AI summary
A light source unit which is reduced in size while securing a certain quantity of light by increasing the utilization efficiency of light and a projector system utilizing the light source unit. The light source unit includes a reflector whose internal surface is planished to provide a mirror reflection effect and which is formed with a lamp accommodation opening and a light emitting opening, a light source including a bulb which radiates light and a lamp comprising an electrode introducing portion that guides electrodes into the bulb, and a condenser which lies on an optical axis of the light radiated from the lamp and which is adapted to gather the light that is radiated from the lamp and that is reflected on the reflector.