Projector Light Source Layout for Compact, Unblocked Light Guidance
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Solution Overview
Problem
The existing light source devices for projectors, which use a configuration where multiple light emitting elements are coupled in series on a circuit board, face challenges with the pressing member's positioning due to the need to avoid blocking emitted light, limiting the degree of freedom in arrangement and potentially increasing the circuit board size.
Innovation Solution
A light source device with a base substrate featuring first and second light emitting element groups arranged with a gap, coupled by a first coupling part, and a regulatory member that overlaps the coupling part, along with a support member and light guide, allowing for efficient light guidance and reduced device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a plurality of light emitting elements is coupled in series on the circuit board, then the light source device can achieve efficient light emission, but the circuit board is apt to grow in size and the degree of freedom of the pressing member arrangement position is reduced
Solution Approach 1:
The light emitting elements are divided into two separate groups (first and second light emitting element groups) arranged on opposite sides of the gap, with current flowing in opposite directions. This segmentation allows the pressing member to be positioned in the gap without blocking light from either group, thus maintaining compact circuit board size while preserving light emission efficiency.
Solution Approach 2:
The patent utilizes the gap dimension between light emitting element groups to position the pressing member and first coupling part. By arranging elements in opposite directions with a gap between them, the design creates additional spatial freedom in the plan view, allowing the pressing member to be disposed without overlapping light emitting elements while maintaining series coupling functionality.
2Loss of energy
If the pressing member is disposed at a position where it does not overlap the light emitting element, then the light path is not blocked, but the degree of freedom of the pressing member arrangement position is low
Solution Approach 1:
By segmenting the light emitting elements into two groups arranged in opposite directions with a gap between them, the pressing member can be positioned in the gap region. This segmentation creates a dedicated space for the pressing member that does not interfere with light paths from either group, thereby preventing light blocking while providing arrangement flexibility.
Solution Approach 2:
The gap between the first and second light emitting element groups serves as an intermediary space that accommodates the pressing member and first coupling part. This intermediary region allows the pressing member to perform its function without overlapping light emitting elements, thus preventing light blocking while maintaining arrangement freedom.
3Area of stationary object
If the circuit board size is reduced, then the device becomes more compact, but the arrangement of light emitting elements and pressing member becomes more constrained
Solution Approach 1:
The patent employs asymmetric arrangement where the first and second light emitting element groups are positioned in opposite directions with a gap between them, rather than symmetric placement. This asymmetric configuration optimizes space utilization on the circuit board, allowing compact size while providing sufficient room for the pressing member and coupling parts without increasing arrangement complexity.
Solution Approach 2:
By utilizing the gap dimension between light emitting element groups arranged in opposite directions, the design creates vertical and horizontal spatial separation. This dimensional arrangement allows the pressing member to be positioned without overlapping elements, achieving compact circuit board size while maintaining simple arrangement logic.
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 enables a compact projector design with improved light use efficiency by optimizing the arrangement of light emitting elements and regulatory members, ensuring efficient light emission and reduced size without obstructing the light path.
Implementation Method 1
a first light emitting element group and a second light emitting element group which are arranged on the base substrate with a gap between the first light emitting element group and the second light emitting element group
Implementation Method 2
a regulatory member which is disposed between the light guide member and the base substrate, and is configured to regulate a position of the light guide member with respect to the support member
Data Source
AI summary
A light source device of the present disclosure includes a light source unit including a first coupling part which is disposed in the gap and electrically couples the first and second light emitting element groups, and a first regulatory member which is disposed between a light guide member and a base substrate, and regulates a position of a light guide member with respect to a support member. The first light emitting element group has a configuration in which a plurality of first light emitting elements is coupled in series so that a current flows along a first direction, and the second light emitting element group has a configuration in which a plurality of second light emitting elements is coupled in series so that a current flows along a second direction opposite to the first direction. The first regulatory member is disposed to overlap the first coupling part.