Movable Lens Array Light Source for Precise Partial Irradiation
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Solution Overview
Problem
Conventional light-emitting devices struggle to precisely control partial irradiation of regions, especially in imaging applications, due to limitations in the number of mountable light-emitting units and their spacing, which affects the naturalness and precision of light distribution.
Innovation Solution
A light-emitting device featuring an array light source with a movement mechanism and control unit that allows the first lens and array light source to move relative to each other, enabling pseudo-increase in the number of light-emitting units by adjusting the relative movement within the exposure period, thereby controlling partial irradiation regions more precisely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of light-emitting units is increased to improve partial irradiation control precision, then the device size increases and manufacturing complexity increases
Solution Approach 1:
The patent makes the lens movable relative to the array light source along the optical axis, enabling dynamic adjustment of the irradiation region. This dynamic configuration allows a fixed number of light-emitting units to achieve variable irradiation patterns, effectively improving partial irradiation control precision without increasing the number of light-emitting units or device complexity
Solution Approach 2:
The patent changes the positional parameter of the lens relative to the array light source to control the irradiation region. By adjusting the lens position, the system achieves precise control over which regions are partially irradiated, maintaining high control precision while keeping the device structure simple
2Measurement precision
If the spacing between light-emitting units is decreased to improve irradiation control, then the manufacturing precision requirements increase
Solution Approach 1:
The patent introduces the lens as an intermediary element between the array light source and the irradiation region. The lens mediates the light distribution, enabling precise control of partial irradiation regions without requiring tight spacing between light-emitting units. This intermediary approach maintains standard manufacturing precision requirements while achieving high irradiation control precision
3Measurement precision
If the number of light-emitting units is increased to improve naturalness of light distribution, then the device size increases
Solution Approach 1:
The movable lens enables a fixed array of light-emitting units to produce variable light distribution patterns. By adjusting the lens position, the system can achieve natural-looking light distribution across different regions without needing to increase the number of light-emitting units, thus maintaining a compact device size while improving light distribution naturalness
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 the precision and naturalness of partial irradiation, allowing for increased divisions of the irradiated region without increasing the device's size or decreasing the light-emitting unit size, thus improving imaging quality while maintaining reliability and productivity.
Implementation Method 1
a first lens configured cause light emitted by the array light source to irradiate a region to be irradiated
Data Source
AI summary
A light-emitting device includes: an array light source comprising a plurality of light-emitting units arranged in an array pattern, each light-emitting unit including a light-emitting surface, wherein the light-emitting surfaces of adjacent ones of the light-emitting units are located at a first light-emitting surface interval; a first lens configured to cause light emitted by the array light source to irradiate a region to be irradiated; a movement mechanism configured to cause the first lens and the array light source to move relative to each other along a direction intersecting an optical axis of the first lens; and a control unit comprising one or more electrical circuits or one or more central processing units, the control unit configured to: control light emission of each of the plurality of light-emitting units in a predetermined period, and control operation of the movement mechanism.