Lighting Control Device for Glossy State Adjustment
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Solution Overview
Problem
Conventional lighting control methods require a larger enclosure and are cumbersome for adjusting the glossy state of objects, particularly faces, as they need to be fitted into a box, making it difficult to achieve a desired even distribution of gloss or shadow.
Innovation Solution
A lighting control device that acquires luminance measured values at fixed points on an object and adjusts the luminance of multiple light sources from different directions to match a predetermined setting value, allowing for easy adjustment of the glossy state without the need for a special enclosure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a box structure is used to diffuse and reflect light from multiple directions, then the glossy state can be adjusted evenly, but the device becomes cumbersome and requires fitting the object into a predetermined space
Solution Approach 1:
The patent extracts the light diffusion and reflection function from the physical box structure. Instead of requiring objects to be placed inside a box, the system uses a camera to capture luminance information and a control unit to calculate and adjust light source outputs, thereby achieving even glossy state distribution without the cumbersome box structure.
Solution Approach 2:
The patent replaces the mechanical box structure with an optical-electronic system. Instead of physically enclosing the object in a box with diffusing and reflecting surfaces, the system uses luminance measurement by a camera and controlled adjustment of multiple light sources based on calculated luminance values, eliminating the need for the physical enclosure while achieving the same lighting effect.
2Manufacturing precision
If multiple light sources are used to irradiate the object from different directions, then the glossy state can be controlled, but the device complexity increases
Solution Approach 1:
The patent implements a feedback control system where the camera captures the actual luminance of the object under the current lighting conditions, the control unit calculates the difference between the measured luminance and the target luminance, and then adjusts the light source outputs accordingly. This feedback mechanism enables precise glossy state control while keeping the device configuration manageable.
Solution Approach 2:
The system performs self-adjustment by automatically measuring its own lighting effect through the camera and correcting any deviations from the target luminance distribution. The control unit calculates the required adjustments based on the measured luminance values and autonomously regulates the light sources, eliminating the need for complex manual adjustment mechanisms.
Data Source
AI summary
A lighting control device includes: a luminance acquirer that acquires a luminance measured value of a fixed point of an object when the object is viewed from a predetermined viewpoint; and a lighting adjuster that individually controls a plurality of light sources irradiating the object from different directions based on the luminance measured value, and adjusts lighting on the object such that the luminance of the fixed point comes close to a predetermined setting value.