Color and luminance measuring device with filter unit
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Solution Overview
Problem
Current color and luminance measuring devices face challenges in accurately measuring light with luminance outside the reference range, requiring separate devices and lengthy measurement times, especially when luminance is high or low, and struggle to provide accurate results from different measurement points.
Innovation Solution
A color and luminance measuring device with a filter unit that controls the luminance of incident light using a filter and controller, allowing for selective transmission of light to a measurement unit, and applies correction algorithms based on the controlled luminance, enabling measurement across a broader luminance range without the need for separate devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate devices are used for luminance measurement and color measurement, then measurement accuracy is improved, but measurement time increases and device complexity increases
Solution Approach 1:
The patent combines luminance measurement and color measurement functions into a single integrated device. The measurement unit includes both a luminance sensor and color sensors (photodiodes with different spectral responses), allowing simultaneous measurement of both parameters from the same light source, thereby eliminating the need for separate devices and reducing measurement time.
Solution Approach 2:
The measuring device is designed to perform multiple functions: it can measure both luminance and color properties of light using a single device. The measurement unit is configured to handle different measurement modes (luminance-only, color-only, or both simultaneously), providing universal functionality that replaces multiple specialized devices.
2Measurement precision
If separate devices are used for luminance measurement and color measurement, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines luminance measurement and color measurement functions into a single integrated device. The measurement unit includes both a luminance sensor and color sensors (photodiodes with different spectral responses), allowing simultaneous measurement of both parameters from the same light source, thereby eliminating the need for separate devices and reducing measurement time.
3Adaptability or versatility
If measured light with high or low luminance is measured by a general method, then measurement is possible, but measurement accuracy deteriorates
Solution Approach 1:
The patent introduces a filter unit with variable transmittance that can dynamically adjust the amount of light reaching the sensors. When the incident light has high luminance, the filter reduces transmittance to prevent sensor saturation; when luminance is low, the filter allows maximum transmittance to ensure sufficient signal strength, thereby maintaining measurement accuracy across a wide luminance range.
Solution Approach 2:
The patent changes the optical parameters of the measurement system by introducing a filter with adjustable transmittance. This allows the system to adapt to different luminance conditions by modifying the light transmission characteristics, enabling accurate measurement across a broader luminance range than the fixed system could handle.
4Ease of operation
If photodiodes are used for color measurement, then color measurement is enabled, but measurement accuracy is affected by external environmental factors
Solution Approach 1:
The patent introduces a filter unit as an intermediary between the incident light and the photodiode sensors. This filter compensates for the sensitivity variations of photodiodes to different wavelengths by pre-filtering the light to match the photodiodes' spectral response characteristics, thereby improving color measurement accuracy and reducing the impact of environmental factors.
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
Enables accurate measurement of both color and luminance across a wider range, reducing measurement time and allowing for simultaneous measurement from the same point, improving the device's efficiency and accuracy.
Implementation Method 1
the filter unit reduces the luminance of the measured light to a predetermined level when the measured light has luminance of a predetermined level or higher
Implementation Method 2
a color-difference meter is configured to measure the color of incident light by a detection sensor consisting of photodiodes
Implementation Method 3
a second measurer which has a path branched from the first path and is disposed on a second path through which the measured light is refracted or reflected at least one or more times
Implementation Method 4
a second measurer which has a path branched from the first path and is disposed on a second path through which the measured light is refracted or reflected at least one or more times
Data Source
AI summary
Disclosed is a color and luminance measuring device including a filter unit including a case which covers the entire device and has a light incident part formed on one side thereof through which measured light emitted from an object to be measured is incident, a measurement unit which measures luminance and a color by receiving the measured light in the case, and a filter unit which is disposed on a movement path of the measured light in the case to selectively control the luminance of the measured light transmitted to the measurement unit and transmit the measured light, wherein the filter unit reduces the luminance of the measured light to a predetermined level when the measured light has luminance of a predetermined level or higher and transmits the measured light to the measurement unit.