Movable Optical Member for Flexible Light Color Adjustment
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Solution Overview
Problem
Existing light emitting devices have a low degree of freedom in color adjustment due to the fixed configuration of light emitting elements and wavelength conversion members, limiting their ability to emit a wide range of colors.
Innovation Solution
A light emitting device with a movable optical member that includes regions with different chromaticities, allowing for the adjustment of the distance between the light emitting unit and the optical member along the optical axis, enabling the mixing of light with varying intensities and chromaticities to achieve a high degree of color flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the configuration of light emitting elements and wavelength conversion members is fixed, then the device structure is simple, but the degree of freedom in color adjustment is low
Solution Approach 1:
The patent makes the optical member movable relative to the light emitting unit along the optical axis, transforming a static fixed configuration into a dynamic adjustable system. This allows the distance between the light emitting unit and optical member to be varied, thereby adjusting the mixing ratio of direct light and converted light to achieve different chromaticities and colors, resolving the contradiction between structural simplicity and color adjustment freedom
Solution Approach 2:
The patent changes the physical parameter of distance between the light emitting unit and the optical member to control the optical path and mixing ratio of light. By adjusting this distance parameter, the device can achieve continuous color adjustment without changing the structural configuration, thus improving adaptability while maintaining relative structural simplicity
2Adaptability or versatility
If each set of light emitting elements emits light separately, then the control is simple, but the degree of freedom in color adjustment is low
Solution Approach 1:
The patent combines multiple light paths (direct light from light emitting elements and converted light through wavelength conversion members) into a single integrated optical output. The movable optical member enables these separate light sources to be mixed and combined, allowing continuous color adjustment through a single control mechanism rather than requiring independent control of multiple light emitting sets
3Adaptability or versatility
If the distance between light emitting unit and optical member is fixed, then the device structure is stable, but the color adjustment capability is limited
Solution Approach 1:
The patent introduces a movable optical member that can adjust its position relative to the light emitting unit along the optical axis. This dynamic adjustment capability allows the device to change color output by varying the distance between components, while the overall structural framework remains stable. The movability is constrained to a specific degree of freedom (along the optical axis) to maintain structural stability
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 device can precisely adjust the color of emitted light by changing the optical member distance, providing a high degree of freedom in color adjustment and reducing color unevenness through the use of wavelength conversion members with different conversion substances.
Implementation Method 1
an optical member configured to transmit or pass light emitted by the light emitting unit
Implementation Method 2
wavelength conversion by a wavelength conversion member such as phosphor
Data Source
AI summary
A light emitting device includes: a light emitting unit; an optical member configured to transmit or pass light emitted by the light emitting unit, the optical member including: a first region configured to transmit or pass light having a first chromaticity; and a second region configured to transmit or pass light having a second chromaticity different from the first chromaticity; and a movable member configured to move to change a distance between the light emitting unit and the optical member along an optical axis of the light emitting unit.