LED (light-emitting diode) color vector testing method and device

Abstract

The invention discloses an LED (light-emitting diode) color vector testing method and device. A spectrometer is used for measuring the color temperature of an LED to be tested, testing projects with variable testing distances are added, and a spherical surface with the color temperature changing along with a polar angle and an azimuth angle in different testing distances is obtained on polar coordinates. A near-field color vector is obtained by an ordering method and used for instructing improvement of the structure of an LED device, a far-field color vector is obtained by a color tolerance method, so that a color vector uniformity index is obtained, and color uniformity of an LED light source in a testing distance is further described. Based on existing equipment, a testing distance linkage movement module, a shading structure and an axial fixture adjusting structure are added, and the method and the device can be widely used for the field of color vector testing of various LED devices.

Description

technical field [0001] The invention relates to the field of LED measurement, in particular to an LED color vector test method and device. Background technique [0002] As a new generation of lighting source, light-emitting diode (LED) has the advantages of long life, high luminous efficiency, energy saving and environmental protection, etc. compared with traditional light sources such as incandescent lamps. It is to improve the luminous efficiency and light color quality of LED light source, such as luminous flux, brightness, color rendering index, etc. In addition, more and more attention has been paid to the color uniformity of white LEDs, but there is still a lack of effective color uniformity evaluation standards and testing methods in the industry. [0003] At present, researchers and manufacturers use the distribution curve of color temperature with angle measured at a fixed distance as the basis for evaluating the color uniformity of LED light sources. But in fact,...

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Problems solved by technology

Therefore, the color temperature distribution curve obtained at this fixed distance cannot describe the color distribution of the LED light source more completely, and the color uniformity evaluation obtained is also one-sided.

[0004] In addition, more and more researchers and manufacturers are now improving the color uniformity of LED light sources by improving the LED chip structure, phosphor powder morphology and packaging form, while the color temperature distribution curve obtained at a fixed distance in the past can only be reflected in the The color distribution of the LED light source in a certain spherical surface, but there is no way to track how this color is obtained from the LED light source, so the test results are difficult to use to guide the improvement of the structure of the LED device

[0005] To sum up, the existing norms and regulations are difficult to fully describe the color distribution of the light source color, and it is also difficult to meet the evaluation requirements for the color uniformity of the light source. At the same time, the lack of relevant testing methods and testing tools also brings great inconvenience to the research work.

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