High-sensitivity non-contact chromaticity measuring device

Abstract

A high-sensitivity non-contact chromaticity measurement device according to the present invention comprises: a lens unit for receiving light rays emitted from a measurement object; the light distribution unit comprises an optical fiber, a condensing lens and n color filters, the optical fiber receives the light rays passing through the lens unit from one side, distributes the received light rays through n paths and outputs the light rays to the other side, and the numerical aperture is larger than a preset reference value; the condensing lens is used for reducing the incidence angle of the light rays output to the other side of the optical fiber to be below a target angle, and the n color filters allow the light rays passing through the condensing lens to pass through at different wavelengths; and a signal conversion unit including a photodiode for converting the light transmitted from the light distribution unit into an electric signal.

Description

technical field [0001] The present invention relates to a non-contact colorimetric measuring device, and in more detail, to a high-sensitivity non-contact colorimetric measuring device in which a condensing lens for reducing the incident angle of light can be provided to adopt a high numerical aperture optical fiber, enabling colorimetric measurement of measurement objects with extremely low luminance. Background technique [0002] Currently, the global display market is rapidly changing from cathode ray tube (CRT) to liquid crystal (LCD) displays, and from liquid crystal to light emitting diode (LED) displays. In particular, production volumes are rapidly increasing as demand for large LED displays increases. [0003] As the production volume of such displays has increased, production quality has also become one of the important factors, and devices for judging whether or not the displays are defective have been developed. In particular, a chromaticity measuring device fo...

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Problems solved by technology

This will affect the XYZ spectral characteristics of the color filter, which will cause errors in the measurement results

[0011] Moreover, in the case of increasing the area of ​​the incident part of the optical fiber by the second method, since the area of ​​the output part of the optical fiber will be larger than that of the photodiode, light loss will occur, and the measurement angle of each point of the measurement light source will increase. Causes problems with colorimetric measurements

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