Lighting Knowledge

The history of LED development

Posted on by VIPLED
LED (Light Emitting Diode), as a semiconductor light source, has gone through a long history of development, and has made tremendous progress and achievements from its initial concept to its wide application today. As of today, LED light seems to have been ubiquitous, from home, business to the highway, LED light can be seen everywhere. But if you look back carefully, you will find that just over a decade ago, we are still accustomed to using fluorescent tubes or power-saving light bulbs such as the old type of lighting equipment, only a few years time, LED bulbs seem to occupy all the lighting places. Why are LEDs so influential? It’s because of its groundbreaking features, whether it’s power savings, high brightness or safety. These features, so commonplace today, are in fact the result of more than a century of technological development. Here’s a look at the evolution of LED light.
Industrial Solutions of led high bay light 6

Development History:

Early research:

In 1927, Russian scientist Oleg Losev first observed the LED effect. However, it was not until 1962, when American scientist Nick Holonyak Jr. invented the first visible LED (red), that LED technology really began to develop.

Color extension:

In the decades following 1962, researchers have realized LEDs in other colors, including yellow, green and blue. Among them, the work of Japanese scientists Isamu Akasaki and Hiroshi Amano, as well as Japanese-American scientist Shuji Nakamura, were particularly notable breakthroughs in the field of blue LEDs, and their results paved the way for the realization of white LEDs, which is considered to be an important reason why they were awarded the 2014 Nobel Prize in Physics.

In the two years after 1961, LED suddenly had a rapid development, Texas Instrument Company (Texas Instrument) first put forward can emit near-infrared light, General Electric Company (General Electric) were put forward with practical benefits of the LED light bulb. And followed in a few years, Hewlett-Packard (Hewlett-Packard) can also be commercialized LED display, at this time, including displays, indicators and other LED commercial equipment began to enter the market, which is our earliest impression of the LED.
In this stage of the most often mentioned credit, is Nick Holonyak (Nick Holonyak, Jr.), that is, he worked at General Electric, built the first visible light in the range of LED bulbs, opened the next half-century so that the LED towards the journey of the lighting tool.
Series 1V high light effect LED Street Light 2
series 1v led stadium light 9
series 3v ufo led high bay light 1_1280_720

LED form:

LED form has experienced a number of evolution. The initial LED using DIP (Dual In-line Package) pin form, common straw hat LED and piranha LED, and the development of high-power COB LED, and then gradually developed SMD (Surface Mount Device) SMD LED, early SMD LED mainly 2835-based, which are used in the lamp band and module Above very much, RGB LED to 5050-based, and later SMD EMC (Epoxy Mold Compound) structure of the LED, to the recent emergence of flip chip, so that the structure of the LED has been optimized, the development of these forms of LED light to improve the integration and reliability of LED light, reduce costs.

LED Lighting form:

the development of LED technology also promotes the continuous innovation of LED lighting. From the initial spotlights, bulbs,led strips, to later outdoor displays, led spotlight, led ceiling light, and then outdoor led lighting such as led street light, led landscape light, led high bay light,led high mast light,led flood light, etc., LED light are becoming more and more diversified to meet the lighting needs of different scenes and demands.

Radiator :

The radiator of LED light has also experienced continuous improvement. Initially, the use of tensile profiles, die-casting aluminum and other materials, and later developed a new type of structure such as fin stamping radiator to improve the thermal efficiency and extend the service life of the LED light, thermal conductive plastics and thermal ceramics are also advancing, many spotlights and indoor products can be selected to do the shell.

Outdoor lighting:

with the continuous progress of LED technology, LED applications continue to expand, including outdoor lighting. Nowadays, outdoor led light include led flood light,led street light,led landscape light, led gas station light,led canopy light, led high bay light, led stadium light,led high mast light, etc., which provide more energy-saving and environmentally friendly choices for night lighting in the city, and combined with the intelligent control system, the outdoor led light have a wider application space.

High light effect:

With the improvement of LED structure, packaging materials, and power supply efficiency, the overall luminous efficacy of the lighting are also improving, the same power lighting with higher luminous efficacy, the same luminous efficacy requirements can be selected under the circumstances of the power of the lighting is lower, more energy-efficient.
SERIES 3V parking lot LED STREET LIGHT 1
series 3v Rectangular thick material led flood light 1
series 1v low glare led tunnel light 1

Aluminium profile shell is generally used is 6061 aluminium, excellent heat dissipation; die-casting material shell plasticity is good, can be the design of a very good shape; fins shell is made of aluminium cold stamping molding, the entire weight of the led light can be made very light, for some of the need for lightweight led light of the case is very suitable, in short, these three kinds of materials can be made of excellent led light shell.

Lighting parameters explained:

Color Temperature (Color Temperature):

The color properties of the light emitted by the LED, expressed in Kelvin (K). Low color temperature of the light presents warm tones, high color temperature of the light presents cool tones.

Illumination (Illuminance):

irradiation to the unit area of the power density of the light beam flow, expressed in lux (lux) as a unit. The higher the illumination, the stronger the light.

light intensity (Luminous Intensity):

light source in a certain direction on the intensity of light emitted, to Candela (candela) as the unit.

Beam Angle (Beam Angle):

LED lamps and lanterns issued by the light scattering range, expressed in degrees (°) as a unit. The smaller the beam angle, the more concentrated the light. The larger the angle, the more light scattering. What is the difference between the beam angle of North America and that of Europe and Oceania?

SDCM (Standard Deviation of Color Matching):

The difference between the color of the actual light source and the color of the standard light source.

Color Rendering Index (Color Rendering Index, CRI):

the ability of the light source to restore the true color of the object, CRI value range of 0 to 100, the higher the value that the light on the object color reproduction is more real.

luminous flux (luminous flux):

the total light power emitted by the light source in a unit of time, usually in lumens (lm) as a unit. Luminous flux is a measure that describes the total amount of light produced by a light source.

Wavelength:

the wavelength of light, a physical quantity that describes the frequency and energy of light. In optics, wavelength is expressed in nanometers (nm) as a unit, i.e., the wavelength of a light wave is the distance light travels in one cycle. The wavelength of light determines the color of light, and different wavelengths of light correspond to different colors. For example, longer wavelengths of light appear red or infrared, and shorter wavelengths of light appear blue or ultraviolet. In the lighting industry, the choice of wavelength usually depends on the lighting effect to be achieved and the application scenario.
series 2v 200w Ultra-thin and full power led flood light
series 6v Copper Tube Thermal Conductivity led high bay light 7
series 1v low glare led tunnel light 1
series 3v ufo led high bay light 3
2v gas station led canopy light 3 vipled
led street light 2v

Why choose VIPLED as your supplier of led light in China?

As a LED lighting manufacturing factory, with more than 10 years of LED manufacturing experience, sufficient stock and fast delivery, mass production cheap price。

AI LED STADIUM LIGHT 2

Professional Design Team:

We have a team of experienced design professionals who are able to provide innovative lighting solutions according to our clients' needs.

AI LED TUNNEL LIGHT 1

QUALITY CONTROL:

We strictly control the quality of our products to ensure that each product meets international standards and is ISO certified to provide our customers with reliable products.

AI LED STADIUM LIGHT 1

Cost Competitiveness:

Due to our manufacturing and purchasing efficiencies, we are able to offer competitive prices while maintaining high quality.

AI GAS STATION LED CANOPY LIGHT 1

Rich certifications and quality assurance:

VIPLED have passed many certifications, including ETL,CETL,CE,SAA, to ensure that the quality of our products meet international standards and provide you with reliable lighting equipment.

AI LED FLOOD LIGHT 1

OEM / ODM Customization

Our top R&D team both in China and abroad, with rich experience in lighting industry, which support us to offer OEM/ODM service for our clients all over the world.

AI LINEAR LED HIGH BAY

FAST DELIVERY TIME

As a reliable led street light supplier, we have stocks of raw materials for led high bay lights, regular delivery time is 3 days for samples and 2 weeks for bulk.

Production Equipment

      In order to ensure the high quality of our lighting products, we adopt automated equipment to ensure high production efficiency, and adequate testing equipment to test the incoming materials, in-process, and outgoing shipments of our products. Only after all the tests are passed can the products be approved for marketing.

SMD Mounter

SMD Mounter

Reflow soldering machine

Reflow soldering machine

photometric integrating sphere

photometric integrating sphere

High Voltage Tester

High Voltage Tester

IES Test Darkroom

IES Test Darkroom

Constant temperature and humidity test chamber

Constant temperature and humidity test chamber

Automatic tin scraping machine

Automatic tin scraping machinet

silkscreen machine

silkscreen machine

LED Lighting Manufacturer Production Shipment Process

      We have skilled workers with more than 10 years of experience in led lighting manufacturing to lead the production and assembly of products, and 100% aging test before shipment. The shipping method is strictly according to the customer's requirements. More than 10 years of work in the LED lighting industry has allowed us to accumulate a lot of work experience, including led flood lights, led street lights, led high bay lights, led high-pole lights, led tunnel lights, led court lights,led stadium lights and so on.

LED Flood light assembly line in production

LED Flood light assembly line in production

High power led high bay lights in production

High power led high bay lights in productiont

High power stadium lights in production

High power stadium lights in production

High power led flood lights in production

High power led flood lights in production

100% product ageing test

100% product ageing test

Product labelling laser production

Product labelling laser production

Production workshop show

Production workshop show

Finished goods shipping area

Finished goods shipping area

Contact Us

Company Name :  Shenzhen Roccoda Technology Co. Ltd.

Email : sales18@roccoda.com

Phone(WhatsApp): +86 18603060660

Add : No. 168,Pearl River Plaza, Longgang District, Shenzhen,China

whatsapp_vipled
WHATSAPP
FACEBOOK VIPLED_600_600
FACEBOOK
LINKEDIN VIPLED_600_600
LINKEDIN

Get In Touch Now