Lighting Device Illuminance Uniformity Control
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Solution Overview
Problem
Lighting devices used in production spaces, such as TV studios and theater stages, often suffer from illuminance unevenness due to the broad orientation of light sources, which can lead to inconsistent lighting on target surfaces, and existing technologies struggle to maintain uniform illumination across different areas.
Innovation Solution
A lighting device comprising multiple light emitting modules arranged in an array or staggered form, with control devices that adjust the light quantity of each module to ensure that the sum of light per unit area on overlapping areas is within ±20% to ±40% of non-overlapping areas, reducing illuminance unevenness across various target surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple light emitting devices are used to increase illumination coverage, then the illuminated area is expanded, but illuminance unevenness increases due to light overlap
Solution Approach 1:
The patent applies local quality by assigning different light quantity characteristics to different light emitting devices based on their spatial positions. Specifically, devices in overlap regions are configured to emit less light than devices in non-overlap regions, creating localized variations in emission intensity that compensate for the叠加 effect and achieve uniform overall illumination.
Solution Approach 2:
The patent changes the light quantity parameter of individual light emitting devices according to their positional relationships. By adjusting the emission intensity parameter of each device based on whether it is located in an overlap or non-overlap region, the system transforms the uniform illumination problem into a controlled parameter variation solution.
2Device complexity
If light emitting devices are arranged in array form to simplify structure, then device complexity is reduced, but illuminance uniformity deteriorates due to fixed geometric patterns
Solution Approach 1:
The patent maintains the simple array structure but introduces local quality variations by differentiating the light quantity characteristics of devices based on their specific positions within the array. This allows the simple geometric arrangement to produce complex, position-dependent illumination patterns that achieve uniformity.
Solution Approach 2:
The patent segments the illumination control into different regions (overlap and non-overlap areas) and assigns different light quantity characteristics to devices in each segment. This segmentation approach allows the simple array structure to be controlled with spatially varying parameters to achieve uniform illumination.
3Device complexity
If conventional lighting control is used without individual device adjustment, then control device complexity is reduced, but illuminance precision deteriorates
Solution Approach 1:
The patent applies local quality to control by configuring each light emitting device with position-specific light quantity characteristics. Devices in overlap regions are controlled to emit less light, while devices in non-overlap regions emit more light, creating localized control adjustments that achieve precise overall illuminance uniformity.
Solution Approach 2:
The patent changes the light quantity parameter of individual devices based on their positional information. By adjusting emission parameters according to whether devices are in overlap or non-overlap regions, the system achieves precise illuminance control without requiring complex real-time adjustment mechanisms.
Data Source
AI summary
A lighting device includes a plurality of lighting modules and a plurality of control devices. The lighting modules each includes a plurality of light emitting devices aligned in an array form or a staggered form. The control devices are configured to adjust light quantities of the light emitting devices of each of the lighting modules so that, when light is irradiated on a first target surface separated by a prescribed distance from the lighting modules, a sum of light quantities per unit area of a part for which light from the lighting modules overlaps in the first target surface is within ±20% with respect to a light quantity per unit area of a part for which light does not overlap in the first target surface.