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D65 and D75 standard light source and method for compensating chrominance drift thereof

A standard light source, D65 technology, applied in the field of standard light source, can solve the problem of failure to appear LED standard light source and so on

Inactive Publication Date: 2015-11-18
SHANGHAI XINJIE LIGHTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coupled with the manufacturing tolerance of the lamp tube, during the rated life of the lamp tube, its color temperature drift will greatly exceed the range specified by the standard, which may be the main reason why the LED standard light source has not appeared on the market

Method used

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  • D65 and D75 standard light source and method for compensating chrominance drift thereof
  • D65 and D75 standard light source and method for compensating chrominance drift thereof

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Embodiment Construction

[0020] The present invention will be further described below according to accompanying drawing, appended figure 1 It is a schematic diagram of the overall structure of the D65 and D75 standard light sources of the present invention, including an LED white light emitting body 101 and a blue LED light emitting element 102. The LED white light emitting body includes: a blue LED light emitting chip and a blue LED light emitting chip wrapped outside Phosphor layer 109 on the blue LED light-emitting chip excites the phosphor layer 109 to emit white light, the color temperature of the white light is at least 1000 degrees K lower than the color temperature of the D65 and D75 standard light sources, and the total power of the LED white light emitter 101 It is more than 4 times the total power of the blue LED light-emitting element 102; the wavelength range of the blue LED light-emitting element 102 is 460nm to 520nm. As long as synchronous attenuation is made, the original spectral com...

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Abstract

The invention relates to a D65 and D75 standard light source and a method for compensating the chrominance drift thereof. The D65 and D75 standard light source comprises at least one LED white-light illuminant and at least one blue-light LED light-emitting element. The light of the LED white-light illuminant and the light of the blue-light LED light-emitting element are mixed to form the D65 and D75 standard light source. Each of the LED white-light illuminant and the blue-light LED light-emitting element is driven by a respective independent power supply. The D65 and D75 standard light source is also provided with color temperature sensors, a comparison circuit, and a power control circuit. The LED white-light illuminant and the blue-light LED light-emitting element are connected with respective color temperature sensors. The color temperature sensors are connected with the comparison circuit. The comparison circuit is further connected with the power control circuit of the blue-light LED light-emitting element. The light-emitting stability of the D65 and D75 standard light source is effectively maintained. During a rated effective service life, the method may effectively compensate the chrominance drift of the D65 and D75 standard light source.

Description

Technical field: [0001] The invention relates to a standard light source, in particular to a D65, D75 standard light source, and a compensation method when color drift occurs in the D65, D75 standard light source. Background technique: [0002] D65 and D75 standard light sources are legal lighting sources widely used in the color or whiteness inspection of various industrial and agricultural products. In order to ensure the consistency of the test results, the chromaticity requirements for the output of this standard light source are very strict, and the color temperature is strictly limited within a very small range. Its color spectrum must be close to white natural light, and the color rendering coefficient must reach more than 95, which is even more difficult. The most important thing is that the stability of this standard light source is very high, and its spectrum cannot be affected by environmental factors or change with use time. Therefore, this standard light source...

Claims

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Application Information

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IPC IPC(8): H05B37/02H01L33/50
CPCH01L33/501H05B47/10
Inventor 关德威
Owner SHANGHAI XINJIE LIGHTING TECH
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