Light Source Device Beam Combination Using Segmented Combining Plate
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Solution Overview
Problem
Conventional light source devices for projection display apparatuses face inefficiencies in combining light beams from multiple solid-state light emitting elements, leading to wasteful use of space and compromised brightness due to vignetting effects when using traditional mirrors with band-shaped transmission and reflection regions.
Innovation Solution
A light source device comprising multiple solid-state light emitting elements arranged in a two-dimensional array on substrates with integrated lenses, combined using a light combining plate with specific transmission and reflection regions to form a closest packed array of light beams, minimizing space usage and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional mirrors with band-shaped transmission and reflection regions are used to combine light beams from multiple light emitting devices, then light beam combination is achieved, but vignetting occurs on the reflection regions leading to compromised efficiency and wasteful use of space
Solution Approach 1:
The light combining plate is segmented into multiple reflection regions and transmission regions arranged in an alternating pattern. Each reflection region is dedicated to reflecting light beams from specific light emitting devices, while transmission regions allow light beams to pass through. This segmentation eliminates vignetting by ensuring each light beam has its own dedicated reflection region, thereby improving combination efficiency and preventing energy loss.
Solution Approach 2:
The invention transitions from a one-dimensional band-shaped arrangement of transmission and reflection regions to a two-dimensional alternating pattern of regions on the light combining plate. This dimensional change allows for more efficient spatial utilization and enables multiple light beams to be combined without vignetting, as each beam can be directed to its appropriate region in the two-dimensional pattern.
2Power
If multiple light emitting devices are densely arranged to achieve high brightness, then output increases, but the distance between light beams becomes short causing vignetting when using conventional mirrors
Solution Approach 1:
The light combining plate is divided into multiple alternating reflection and transmission regions, with each reflection region assigned to specific light emitting devices. This segmentation allows densely arranged light beams to be efficiently combined without vignetting, as each beam has its own dedicated reflection region regardless of how closely the light emitting devices are positioned.
Solution Approach 2:
The invention provides for more reflection regions than strictly necessary for the current number of light emitting devices, creating a pattern where reflection and transmission regions alternate. This excessive provision of reflection regions ensures that even as light emitting devices are added or repositioned, vignetting is prevented and space utilization remains efficient.
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 allows for highly efficient combination of light beams from multiple light emitting devices without wasting space, resulting in a compact, high-brightness light source device that can be used in projection display apparatuses.
Implementation Method 1
a first region and a second region, the first region transmitting first light beams emitted from the plurality of first solid-state light emitting elements
Implementation Method 2
the second region reflecting second light beams emitted from the plurality of second solid-state light emitting elements
Data Source
AI summary
A light source device includes: a first light emitting device including a plurality of first solid-state light emitting elements arranged at a regular interval in a two dimensional array form; a second light emitting device including a plurality of second solid-state light emitting elements arranged at a regular interval in a two dimensional array form; and a first light combining plate including a first region and a second region, the first region transmitting first light beams emitted from the plurality of first solid-state light emitting elements of the first light emitting device, the second region reflecting second light beams emitted from the plurality of second solid-state light emitting elements of the second light emitting device. Beam arrangement of (i) the first light beams transmitted through the first light combining plate and (ii) the second light beams reflected by the first light combining plate form a closest packed array.