Light Source Filters with Reflected-Light Isolation for Stage Lamps
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Solution Overview
Problem
Current projection lighting technologies face issues with light source stability due to light attenuation caused by reflected light, insufficient luminous flux, and limited color gamut coverage, especially in laser and LED-based systems, which affect brightness and color quality.
Innovation Solution
A light source device utilizing multiple light source modules with filters and isolation devices to manage reflected light, preventing attenuation and enhancing luminous flux and color quality through a combination of red, blue, and green LEDs with specific filters and reflection films to isolate and redirect unwanted wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a filter is used to obtain green light from a polychromatic LED light source, then the desired wavelength is obtained, but reflected light returns to the light source causing serious light attenuation
Solution Approach 1:
The patent extracts and removes the harmful reflected light from the optical system by introducing isolation devices that specifically target and eliminate the reflected light paths returning to the LED light sources, thereby preventing light attenuation while maintaining the filtering function
Solution Approach 2:
The patent introduces isolation devices as intermediary elements between the filters and light sources. These isolation devices act as mediators that block reflected light from reaching the light sources while allowing the desired light transmission function to continue operating
2Illumination intensity
If blue light is reflected to a red light source, then the filtering function is performed, but the red light source is caused to attenuation seriously
Solution Approach 1:
The patent converts the harmful effect of reflected blue light onto the red light source into a beneficial situation by using isolation devices to redirect and eliminate the harmful reflected light, while the isolation devices themselves become beneficial components that protect the light sources and improve overall system stability
3Device complexity
If a single blue laser light source is used, then the device complexity is reduced, but the color gamut coverage is too small to achieve high-quality color reproduction
Solution Approach 1:
The patent merges multiple LED light sources (red, green, blue) into a single integrated light source device, combining their functions to achieve broad color gamut coverage while maintaining a unified device structure that manages complexity through integrated design
4Stability of the object's composition
If the divergence angle of the laser light source is very small, then the laser properties are maintained, but it is difficult to form a uniform projection image
Solution Approach 1:
The patent segments the laser beam path into multiple controlled sections, using optical elements to divide and redistribute the laser light in a controlled manner, thereby transforming the highly directional laser beam into a more uniform projection image while maintaining laser coherence where needed
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
The solution achieves stable light output with high color quality and luminous flux by minimizing light attenuation and improving color reproduction in projection lighting systems.
Implementation Method 1
uses the first light source module, the second light source module, and the third light source module in cooperation with the first filter and the second filter to obtain output light having high color quality and high light flux
Implementation Method 2
provision of the first isolation device eliminates influence of the second light of the second light source module, which is obtained by reflection after passing through the first filter, on the first light source module
Data Source
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Figure 3
AI summary
Provided is a light source device, comprising a first light source module (100), a second light source module (200), a third light source module (300), a first filter (400), and a second filter (500). The first light source module (100) emits first light having a wavelength in a first spectral range. The second light source module (200) emits polychromatic light, the polychromatic light comprises second light having a wavelength in a second spectral range and third light having a wavelength in a third spectral range. The third light source module (300) emits fourth light in the second spectral range. The first filter (400) transmits the first light and the third light, reflects the second light, and reflects the fourth light to a light exit of the light source device to be outputted. The second filter (500) transmits the third light and the fourth light, and reflects the first light to the light exit of the light source device to be outputted. The first light source module (100) is provided with a first isolation device configured to prevent the second light from entering the first light source module (100). The light source device has stable light source and low light attenuation, and the stage lamp illumination system using the light source device has stable light output, high brightness, and good color quality.