LED injection molding modules are commonly used lighting products that we can often see, such as light-emitting products in subway light boxes, light-emitting products in airport signs, and various signs in streets and alleys. He has brought infinite light and fun to our cities and villages! This is what we can feel. If we need to have a deeper understanding of the LED injection molding module, we need to start from its professional terminology. a. The spectral distribution of light radiation of led injection moulding module has its unique side. It is neither monochromatic light (like lasers) nor broad-spectrum radiation (like incandescent lamps), but somewhere in between: there are bandwidths of tens of nanometers, with peak wavelengths in the visible or near-infrared region

. The spectral characteristics of led characterize its monochromaticity and whether its main color is pure. b. The relative spectral energy of the LED injection molding module. The general light source is a polychromatic light mixed with different wavelengths of color light. If the intensity of each color light in its spectrum is measured with a sensor, the radiation of different wavelengths of color light can be obtained. energy value. If φe represents the radiant energy of light, and λ represents the wavelength of the spectral color, it is defined that the ratio of the radiant energy in the small wavelength range centered on the wavelength λ to the width of the wavelength is called the spectral density. Written in mathematical form: φe(λ)=dφe∕dλ (w/nm) The spectral density represents the magnitude of the radiant energy in the unit wavelength range. Usually the radiant energy of different wavelengths of color light in the light source varies with the wavelength

changes, therefore, the spectral density is a function of wavelength. The functional relationship between spectral density and wavelength is called spectral distribution. c. The peak wavelength (λp) of the LED injection molding module, unit: nm, the light emitted by the LED is not a single wavelength, and the wavelength corresponding to the maximum spectral luminous intensity or radiant power is the peak wavelength, which is represented by λp. d. The main wavelength (λd) of the led injection molding module, unit: nm, with a certain spectral color, mixed with a certain standard illuminator (such as cie standard illuminator a, b, c or d65) according to a certain proportion. The sample color is matched, and the wavelength of the spectral color is the dominant wavelength of the sample color. In the cie1931 horseshoe coordinate, the extension line from the point e (0.33, 0.33) to the measured object has an intersection with the horseshoe curve, and the wavelength corresponding to the intersection is the dominant wavelength of the sample. The dominant wavelength of a color is equivalent to the hue (psychological quantity) of the color observed by the human eye. e. The half width (△λ) of the LED injection molding module, unit: nm, at ±△λ on both sides of the peak of the LED spectral line, there are two points where the radiation power is equal to half of the peak (maximum light intensity)

, these two points correspond to λp-Δλ, λp+Δλ respectively, and the width between them is called spectral line width, also called half-power width or half-height width. The half-height width is a parameter that reflects the monochromaticity of the led. f. The luminous flux (φ) of the led injection molding module, unit: lumen/lm, is the rate of light energy emitted by a light source or the flow rate of light, and is the basic quantity to describe the ability of the light source to emit light, that is, the light source emits light per second. The total amount of visible light. gg. The luminous intensity of the led injection molding module (iv), unit: candela (cd), the visible light emitted by the light source in all directions, in a certain direction, the luminous flux emitted within the unit solid angle dω is dφ, then the point light source is in this The luminous intensity iv in the direction is: iv=dφ/dωh. The illuminance (e) of the led injection molding module, unit: lux (lx) The luminous flux received by the unit irradiated area: e=dφ/da 1lx=1lm/m2i. The brightness (l) of the led injection molding module, unit: candela ∕ square meter (cd/m2), describes the spatial distribution of visible light emitted by a luminous body with a limited size. Definition: the ratio of the luminous intensity iv of the unit luminous area da in the θ direction to the projection cosθda of the unit area on the plane perpendicular to the direction: l=iv/cosθda The above is the introduction of the professional terminology of led injection molding module, if you need more For detailed information on LED injection molding modules, please consult Shenzhen SUNLITE Optoelectronics Co., Ltd. Shenzhen SUNLITE Optoelectronics Co., Ltd. is a high-tech company dedicated to the research and development, production, sales and service of LED light box lighting, sign lighting and decorative lighting products. technology companies. Our website is http://en.sunlite-led.com, welcome to consult.