Category: LED Knowledge

LED Knowledge

Sairaalan valaistuksen suunnitteluohjeet

Lyhyt johdanto

Sairaalan valaistus on tärkeä osa sairaalan rakentamista ja johtamista. Sillä on merkittävä vaikutus ja vaikutus lääkintähenkilöstön terveyteen ja diagnoosin ja hoidon vaikutuksen toteutumiseen, potilaiden kuntoutukseen ja lääkäri-potilassuhteen parantamiseen, sairaalan toiminnan hallintaan ja kustannusten hallintaan.

Sairaalan rakentamiseen ja varsinaiseen toimintaan ei kuitenkaan ole kiinnitetty riittävästi huomiota. Syynä on se, että sairaalarakennuspuolella ei tiedetä paljoa valaistuksen roolista ja sairaalavalaistuksen akateeminen tutkimus on suhteellisen vähäistä.… Read More

LED Knowledge

Packaging of high-power lighting-class LEDs_Part II

3. Basic Packaging Structure

3.1 Heat dissipation coefficient

It is worth noting that the material selection between the copper-based heat sink and the chip is very important. The commonly used chip connection material in the LED industry is silver glue. However, after research, we found that the thermal resistance of silver glue is extremely high, which is 10-25W/(m.K). If silver glue is used as the connection material, it is equivalent to artificially adding a thermal resistance between the chip and the heat sink.… Read More

LED Knowledge

Fördelar med LED-ljus

Fördel 1. Lampkroppen är mycket liten

LED-lampa är ett mycket litet, mycket fint LED-chip inkapslat i transparent epoxiharts, så det är väldigt litet, väldigt lätt, det kan spara mycket material och utrymme i produktion och applikation.

 

Fördel 2 mycket låg energiförbrukning

Arbetsspänningen för LED-lampan är i allmänhet bara 2~3,6V, och arbetsströmmen är endast 0,02~0,03A. Det vill säga att den inte förbrukar mer än 0,1W och förbrukar mer än 90 % mindre el än glödlampor med samma ljuseffektivitet, vilket är mer energibesparande.… Read More

LED Knowledge

Packaging of high-power lighting-class LEDs_Part I

1. Packaging of High-power Lighting-class LEDs

From a practical application point of view: high-power LED devices that are simple to install and use and relatively small in size will definitely replace traditional low-power LED devices in most lighting applications.

The benefits are very obvious. In order to meet the needs of lighting, the lighting fixture composed of low-power LEDs must concentrate the light energy of many LEDs to meet the design requirements.… Read More

LED Knowledge

Graden av beskyttelse av elektrisk utstyr (IK)

IK-standarder og omfang

IK-standarden gjelder beskyttelsesklassifisering av elektrisk utstyrskapninger med merkespenning ikke over 72,5 kV mot utvendige mekaniske påkjørsler, og gjelder kun kapslinger som har spesielle krav til utvendig mekanisk kollisjonsbeskyttelsesklassifisering.

GB/T 20138-2006/IEC 62262;2002 Graden av beskyttelse av elektrisk utstyrs kabinetter mot eksterne mekaniske kollisjoner <IK-kode>.

 

område

Denne standarden gjelder klassifiseringen av beskyttelse mot eksterne mekaniske kollisjoner av elektrisk utstyrsskap med en merkespenning som ikke overstiger 72,5 kV.… Read More

LED Knowledge

Innovative Street Light Energy Saving

Abstract:

Urban lighting energy-saving work has become an important part of building a sustainable national economic system and a resource-saving and environment-friendly society. In terms of lighting energy saving, lighting design is the core link to achieve energy saving, which must be attached great importance to. Many energy-saving measures and links are reflected in the design scheme. For example, under the premise of meeting the requirements of light intensity distribution and glare restrictions, choose lamps with good light distribution curves and high protection levels as much as possible.… Read More

LED Knowledge

Принцип работы балласта металлогалогенной лампы

Балласт металлогалогенной лампы

Металлогалогенная лампа в дуге с электронным балластом 35 Вт имеет отрицательную характеристику сопротивления во всех газоразрядных лампах; то есть, пока ток через лампочку увеличивается, напряжение на напряжении уменьшается. Если лампочка питается от источника постоянного напряжения, например, непосредственно от сети переменного тока, ток будет увеличиваться до тех пор, пока лампочка не разрушится; поэтому для галогенной лампы требуется электрический балласт для ограничения тока дуги.… Read More

LED Knowledge

Flicker Characteristics and Measurement Methods of LED Lighting Fixtures

1. Evaluation criteria for flickering

At present, the generally accepted flicker evaluation indicators include flicker index, flicker percentage or modulation depth.

Flicker index (Iflicker) refers to the ratio of the area of the envelope area above the average line of the output light to the area of all envelope areas, as shown in Figure 1 and Equation (1).

Fig.1 Diagram for definition of flicker index and percent flicker

Percent Flicker (Pflicker), namely the modulation percentage (Mod%) or Modulation Depth (Dmodulation), is defined as shown in formula (2).… Read More

LED Knowledge

Tre errori comuni e soluzioni di luci a LED

Le lampade a LED sono a risparmio energetico, ad alta luminosità, a lunga durata e a basso tasso di guasto. Sono diventati il corpo luminoso preferito degli utenti domestici ordinari. Tuttavia, un basso tasso di errore non significa che non vi sia alcun errore. Cosa dobbiamo fare quando la lampada a LED si guasta: sostituire la lampada? Troppo stravagante! In effetti, il costo della riparazione delle luci a LED è molto basso, la difficoltà tecnica non è elevata e la gente comune può farla funzionare.… Read More

LED Knowledge

LED Should Speed up the Research and Development of New Materials and New Technologies

Abstract

As a representative of a new generation of light sources, LEDs theoretically have excellent performance, such as high brightness and light efficiency. LED lamps have high efficacy, small size, light weight, robustness and long life. Low driving voltage, easy to drive. Suitable for a variety of occasions, such as indoor lighting, road lighting, architectural lighting, display applications, traffic signal lighting, industrial lighting.… Read More