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ORED Lighting Develops Driver on Board Solution for its LED Lights

ORED has applied the advanced technology in high wattage COB module lights and develops a brand new ceramic based driver on board light series which is far way different from existing SMD type modules lights.

DOB (Driver on Board) series are designed to be driven directly off of AC 110V and 220V without converters. It is becoming a brilliant solution for lighting designs within limited space.

The ceramic based DOB series lights are not only better in design of viewing angle and efficiency but also has been put a lot of efforts in protection devices of LED to make sure customers to get the most reliable products. With 90-130V AC and 200-240V AC direct input, ORED’s lights with DoB solution in protection devices from soft start, OVP (over voltage protection), to heat compensation, making certain the LED chips inside cool and safe.

ORED thrives on providing customers with design-friendly products, and the latest DoB series lights will be no different. The converter and driver are the major factors on the lifetime limitation in LED lighting products. By using the DoB chip our lights are able to achieve higher efficiency and better lifetime. The LED lights of DoB chip solution could provide lighting output from 3W to 50W with 90lm/W, PF 0.95, CRI >70 and all these features allow us to provide better new solution .

Now the industrial giants including Epistar have started to develop the DoB chip technology, many of the international distributors and customers are very interested in getting the new solution and excited about this new module released in the market.


Epistar Promotes Co-Activation Service Model and Develops Driver on Board Chip Technology

Competition in the LED market has been heating up with China-based LED firms aggressively integrating the whole supply chain vertically from chips to packaging to modules. China-based firms are able to provide one-stop-shop services and use low-price strategies to expand their presence in the LED application market. This is negatively impacting Taiwan’s LED makers, especially small- and medium-size packaging and module firms, who are experiencing shrinking market share. Against this backdrop, Taiwan-based LED chipmaker Epistar began promoting Co-activation Service Model three years ago hoping to turn the tide by teaming up with Taiwan-based packaging and module firms.

Virtual vertical integration of the supply chain

The core concept of Epistar’s Co-activation Service Model is virtual vertical integration. In this business model, it is Epistar that mainly receives projects from clients and coordinates cooperation with other firms. “We will evaluate the project’s needs, find the most suitable packaging and module firms that we can work with, and build an optimized supply chain for partners to sell the products or to provide OEM services,” according to Ita Lin, associate vice president of Epistar’s Marketing Center.

In reality, due to issues concerning the company size, sales, marketing, and brand recognition, it is difficult for Taiwan-based small- and medium-size packaging or module firms to obtain orders from well-known lighting firms or mobile device back lighting suppliers. In contrast, Epistar is a world-leading LED chip maker and has established a strong brand image and trust within the industry, allowing it to play a leading role in the virtual vertical integration for the Taiwan LED industry in its completion against others in the world.

HV DoB is popular in the market

Due to the demand aforementioned, Epistar currently relies on Co-activation Service Model to mainly promote driver on board (DoB) solutions with high-voltage (HV) chips. The one big advantage of  HV chips is their ability to operate under HV direct current, hence in the process of turning alternative current (AC) into direct current (DC) there is no need to dramatically lower the voltage. This also means the chip does not require expensive drivers but can rely on linear driver circuits. In fact, in the 2014 Frankfurt Light + Building exhibition, some of Epistar’s major customers such as Philips and other Europe- and US-based firms showcased HV linear lighting products.

The DoB technology is to package power drivers directly onto the circuit board which can help minimize the size of the light source. This means the integration of  HV chips into the DoB can greatly lower BoM costs and simplify designs. The DoB module introduced by the Co-activation Service Model provided by Epistar and its fellow partners can be immediately used after the lighting fixture firm takes delivery and puts two screws on it. This greatly lowers the entry barriers faced by traditional lighting fixture firms in the LED lighting market, and therefore this solution is quite popular.


ORED Lighting Applied the latest LED – Cooling and Thermal Management Design in LED Lights

As we all know, the life span of an LED depends on the semi-conductor material used as well as the current/heat relationship. The light output of the LED becomes weaker and weaker and once it reaches 50% of its initial value, the life expectancy of the LED has, by definition, been reached. A life span of a few hundred and up to 100,000 hours is possible, but only when avoiding high temperatures which drastically reduce the length of the LED’s life.

The radiant power or the luminous flux of an LED is very much dependent on the temperature of the semi-conductor. This means that the efficiency of the LED clearly diminishes the higher the temperature is.

Even when an LED is referred to as a “cold radiator”, the entire electric energy in the LED is not converted into luminous power. Here, just like other semi-conductors, a large portion of the electric energy (70%-80%) is converted into heat. This is why; unlike thermal radiators (light bulb) thermal management (cooling) is absolutely necessary. The effectiveness or in other words, the efficiency of the LED is the relationship of radiated luminous flux to applied electrical energy and is specified in Lumens per Watt (lm/W).

Figure 1 Illustration of the latest LED cooling design

The above picture shows the latest cooling design applied in our high power LED lights. By using the ø 6mm heat pipe, the heat generated by the lighting quickly transfers to the cooling module of massive radiation fins, efficiently reduce the temperature of the LED lighting chips and extend the lifespan of the lighting source. The heat conductivity hereby reaches 383.8 w/m℃,which significantly reduces the temperature and lengthens LED lifespan.