We all know that the light-emitting diode must have a current to make it glow, so when the forward current passing through the light-emitting diode is a certain value, a voltage drop will occur, as long as it is within the qualified range, it can be regarded as a product that meets the parameter requirements.
As a professional manufacturer of LED lamps, every order we receive must be inspected to meet the project requirements. Today we mainly explain the inspection and testing items of the core light source part of the lamp:
1. Forward voltage. We all know that the light-emitting diode must have a current to make it glow, so when the forward current passing through the light-emitting diode is a certain value, a voltage drop will occur, as long as it is within the qualified range, it can be regarded as a product that meets the parameter requirements;
2. Reverse current. The reverse current is the current parameter flowing through the light-emitting diode after the reverse voltage value is stabilized;
3. Peak wavelength. The maximum wavelength under the spectral detection instrument;
4. Half-intensity angle. The luminous intensity within the luminous intensity distribution range must be greater than or equal to the angle formed by half of the maximum intensity.
5. Dominant wavelength. We all know that each color of light needs to try a certain spectral color to mix and match it with a reference light source in proportion, and this spectral color is the dominant wavelength of the color, and the dominant wavelength is the color hue that we can observe with the naked eye. If you have obtained the chromaticity coordinates of the LED under test, then you can use an equal-energy white light source as the main wavelength for measuring the color of the light source. We connect the chromaticity diagram to find the chromaticity point and the straight line slope of the sample, read the intersection point of the straight line and the spectrum track, and finally know the dominant wavelength.
6. Average strength. The light source will have a solid angle in a given direction, the ratio of the luminous flux contained in it to the solid angle, the unit is called candlelight, which is the basic unit for us to judge the light intensity.
7. Radiation bandwidth. The wavelength spacing in which the spectral radiant power is greater than or equal to half the maximum value is called the radiation bandwidth.
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