A kind of LED filament luminous intensity standard lamp

A technology of LED filament and luminous intensity, applied in the field of optical radiation measurement, to achieve the effects of good value reproducibility, reduced uncertainty, and good horizontal and vertical angle characteristics

Active Publication Date: 2018-10-30
NAT INST OF METROLOGY CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current photometric value transfer system is based on incandescent standard lamps. However, the spectral power distribution of LEDs is different from that of incandescent light sources. When using incandescent standard lamps to directly measure LED light sources, the deviation of the measurement results due to spectral mismatch errors is even as high as 30%. Can not meet the needs of LED industry development

Method used

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  • A kind of LED filament luminous intensity standard lamp
  • A kind of LED filament luminous intensity standard lamp
  • A kind of LED filament luminous intensity standard lamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as Figure 2-Figure 5 A pear-shaped LED filament luminous intensity standard lamp as shown includes: a lamp base 1 and a lamp housing 6, the lamp housing 6 is provided with a glass stem 3, a filament support 7, and an LED filament 5, and the lamp housing 6 is sealed and filled with helium Gas; the filament support 7 is fixed on the glass stem 3, and the two guide wires leading out of the glass stem 3 are the positive connection 4 and the negative connection 2 respectively, the positive connection 4 is connected to the center of the lamp cap 1, and the negative connection 2 Helically connected with the edge of the lamp holder 1; there are 6 LED filaments 5 in total, each filament is 31mm long, 1.6mm wide, rated power 0.8W, current 12mA, color temperature 2670K, color rendering index 81, and the two ends of the filament are respectively fixed on the filament The upper and lower parts of the bracket 7, the LED filaments 5 are arranged in parallel in a group of 3, and ...

Embodiment 2

[0035] Such as Figure 6-Figure 7 A cylindrical LED filament luminous intensity standard lamp as shown comprises: a lamp base 1 and a lamp housing 6, the lamp housing 6 is provided with a glass stem 3, a filament support 7, and an LED filament 5, and the lamp housing 6 is sealed and filled with helium gas; the filament support 7 is fixed on the glass stem 3, and the two guide wires leading out of the glass stem 3 are the positive connection 4 and the negative connection 2, which are respectively connected to the two ends of the lamp cap; there are 2 LED filaments 5 in total, Each filament is 31mm long, 1.6mm wide, with a rated power of 0.8W, a current of 12mA, a color temperature of 2670K, and a color rendering index of 81. The filament support 7b (glass) is fixed on the top of the lamp housing 6; the LED filaments 5 are connected in series and arranged in a rectangular (side length 31mm×18mm) plane inside the lamp housing, and the center of the rectangular plane is connected ...

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Abstract

Provided is a luminous intensity standard lamp with LED filaments. The luminous intensity standard lamp with the LED filaments comprises a lamp holder and a lamp housing, wherein a glass stem, a filament support and the LED filaments are arranged in the lamp housing; the lamp housing is sealed and filled with heat-dissipating protective gas; the filament support is fixed on the glass stem; two guide wires are led out from the inside of the glass stem and are a positive pole connecting wire and a negative pole connecting wire respectively; the positive pole connecting wire and the negative pole connecting wire are respectively connected to two poles of the lamp holder; the LED filaments are fixed on the filament support, and are arrayed in a plane in the lamp housing in parallel in an evenly spaced manner; the center of the plane is consistent to the center of the lamp housing; the surface of the lamp housing is blackened and a diaphanous window is formed in the surface of the lamp housing; the diaphanous window is positioned in the center of the blackened surface; and the center of the diaphanous window is consistent to the center of the plane of the LED filaments. The luminous intensity standard lamp with the LED filaments is simple in structure, easy to mount and adjust, good in horizontal and vertical angle characteristic and uniform in illumination field distribution, and has the advantages of good stability, vibration resistance, high yield and low cost; and measurement result uncertainty caused by spectral mismatch can be reduced remarkably.

Description

technical field [0001] The invention belongs to the field of light radiation measurement, and relates to an LED filament luminous intensity standard lamp, in particular to an LED filament luminous intensity standard lamp which can meet the photometric parameter measurement of a light-emitting diode (LED) light source. Background technique [0002] The luminous intensity standard lamp is a standard measuring instrument for storing and transmitting the value of the luminous intensity unit. Luminous intensity unit candela (cd) is one of the seven basic units of SI, and other photometric units such as lm (luminous flux unit), lx (illuminance unit), cd / m 2 (Units of brightness) are derived from the unit of luminous intensity. The traditional luminous intensity standard lamp is an incandescent lamp, and its illuminants are arranged in a plane, and the illuminance distribution on the measurement plane is even. By designing the shape of the lamp shell, painting the surface black or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21K9/238F21V19/00F21V15/02F21Y115/10
CPCF21V15/02F21V19/001
Inventor 刘慧林延东刘建赵伟强杨臣铸
Owner NAT INST OF METROLOGY CHINA
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