Color measurement device

The colorimetric device addresses measurement inaccuracies by using a shutter unit with a reflection reference surface and magnetic sensor to adjust detection signals, ensuring accurate color measurements and dust prevention.

JP7760237B2Active Publication Date: 2025-10-27SEIKO EPSON CORP
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Patent Information

Application Number
JP2020188466
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2020-11-12
Publication Date
2025-10-27
Estimated Expiration
2040-11-12

AI Technical Summary

Technical Problem

Existing colorimetric devices face issues with obtaining accurate white reference values and measuring object colors due to the support plate's position affecting the measurement window, leading to inappropriate measurements.

Method used

A colorimetric device with a shutter unit that can be displaced between closed and open positions, featuring a reflection reference surface and a detection means to adjust detection signals based on the shutter's position, using a magnetic sensor to ensure appropriate control and prevent dust entry.

Benefits of technology

Enables accurate color measurements by ensuring the shutter unit is in the correct position for obtaining reference values and preventing dust ingress, improving measurement reliability and usability.

✦ Generated by Eureka AI based on patent content.

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Abstract

To solve the problem in which: in acquiring a white reference value, when a support plate is in a state of opening a measurement window, an appropriate white reference value cannot be acquired, and when the support plate is in a state of closing the measurement window, the color of an object to be measured cannot be appropriately measured.SOLUTION: A color measuring device comprises: an opening that is formed in an opening forming member arranged on a bottom face of the device for taking light arriving from an object to be measured into the device; an incident light processing unit that processes the light incident through the opening; a shutter unit that is displaceable between a closing position for covering the opening and an opening position for opening the opening, the shutter unit having a reflection reference surface to be a reference of a reflectance at a position facing the opening; and detection means that changes a detection signal to be output according to the displacement of the shutter unit.SELECTED DRAWING: Figure 44
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Citation Information

Patent Citations

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