Analysis of Lumia 1520 screen technology

After the birth of Nokia Lumia 1520 can be said to break a number of "first" title, such as the history of the largest screen of the Nokia mobile phone, the first 1080p screen Windows Phone mobile phone, the first Windows Phone quad-core mobile phones and so on. In the eyes of Nokia, Lumia 1520 is not only defined as a mobile tablet device, but unlike the previous Nokia Lumia 1520 in addition to the selling point of the PureView camera, its screen technology has become the user's focus of attention.

In fact, as early as the Symbian era, Nokia's mobile phone in the screen display technology has a deep research, and this screen technology was named Nokia screen technology. The Nokia Lumia 1520 is not only equipped with a 6-inch 1080p IPS screen, but also joined the ClearScreen screen technology. This is explained in the official publicity: Nokia Lumia 1520 has excellent outdoor visual effects, high brightness mode, but also supports the use of gloves, nails operation.

Recall that Samsung and LG recently introduced curved screen devices, namely Samsung GALAXY Round and LG G Flex. Common to both devices is the use of curved OLED screen technology. But for Nokia, many people may not know that the Lumia family was actually equipped with a curved second-generation Gorilla glass screen very early, which made us wonder whether Nokia will bring us a similar curved screen device in 2014.

Remember before Nokia's official statement stated that Lumia 1520 was equipped with the best screen ever made by the company. Jussi Ropo, Nokia display and touch technology manager, said: "On the level of providing consumers with new experiences, the Nokia Lumia 1520's 1080p screen is the most perfect screen we have ever built." In addition, Elop also highlighted the 1520's 1080p screen in the sun has a very good visual effects at the conference, and is also using the Assertive Display Algorithm mode. This is even more important than resolution.

The reason why Nokia is so confident is also inextricably linked with the two technologies introduced next. Let's take a closer look at the two screen technologies of the Lumia 1520.

First of all, let's talk about ClearBlack Display. For this technology, Nokia explained: “The principle of ClearBlack Display is similar to that of polarized sunglasses. When it is sunny, if you use it without polarized light, When you look directly at the water surface, you can't see anything below the surface of the water. Similarly, if you don't have the screen technology, you can only see the reflection on the screen. With it, you can see the screen. But the screen technology is different from sunglasses, which is that it can enhance the vividness of color: the reason is that the contrast is higher and it looks more vivid."

For a typical smart phone, it is often achieved by increasing the brightness of the screen to get better performance, but it will inevitably increase the power consumption of the screen. However, it can effectively solve this problem.

In fact, in addition to the successful screen display technology, we also found the Assertive Display technology used in the Lumia 1520. The emergence of this technology is mainly to enable the Nokia Lumia 1520 to increase the visibility of the screen outdoors without sacrificing endurance. Therefore, Assertive Display technology is currently the best screen management function.

In the past, the smart sensor equipped with a light sensor can automatically adjust the brightness of the screen according to the light conditions. However, the Assertive Display does not change the brightness, but adjusts the color and brightness of each pixel independently, and the whole adjustment process does not cause loss of endurance. The screen can also be dynamically adjusted according to the lighting environment.

All in all, the Lumia 1520 screen does a good job. It is not simply changing the brightness of the screen display, but adjusting the contrast between the pixels to make it appear clearer. From this point of view, the successful screen technology with Assertive technology is the key to the success of Lumia 1520.

The most comprehensive introduction of LED PCB

The relationship between LED and PCB

The Printed Circuit Board is a genius innovation of circuit technology, laying less space and materials for more complex and large-scale circuits. The printed circuit board is such an important invention in circuit technology because it makes electrical and electronic components smaller, more flexible and more precise. For example, FPC( Flexible PCB ), Multilayer PCB , BGA PCB , rigid- Flex PCB and so on.

LED is an abbreviation for light-emitting diode. An LED is essentially a two-lead semiconductor device that emits light when current passes in a certain direction. Although LEDs start with devices that only emit low-intensity infrared light, this technology has been widely used in lighting for many years. Modern LEDs not only provide high intensity, very bright light but also different uses and use in different scenes, such as plant growth lights, car lights, street lights, traffic lights, shadowless lights in hospital operating rooms.

Soldering the LED chip to the PCB Board , as long as the PCB circuit is connected in some way, it will illuminate, which forms the LED PCB. LED PCBs typically also have a heat sink and ceramic pedestal to hold the circuit in place and allow the smooth operation of the circuit. A heat sink is required because LEDs tend to generate a lot of heat, which can damage the PCB and the equipment that connects the circuits.

Because LED will produce a lot of heat, led PCB generally uses metal substrate as its production material. Metals with the ability to dissipate heat quickly have proved to be a better choice. Generally, whenever led PCB is designed, Aluminum PCB is preferred. Aluminum PCB usually also contains a thin layer of dielectric, which can dissipate heat faster.

In addition to general lighting, led PCB can also provide visible light, infrared and ultraviolet light. Compared with other light sources, LED PCB can provide higher energy.

We are a professional LED PCB manufacturer and assembler in China, In this article, we would like to introduce in detail what is LED PCB, the materials used in manufacturing and LED circuit boards manufacturing, the application of LED Printed Circuit Boards and so on.

LED PCB board Introduction

LED PCB has many other names, such as LED PCB board, LED circuit, LED Circuit Board, led printed circuit boards, PCB board for LED.

In a sense, LED PCB and aluminum PCB belong to the same kind of PCB products, because their uses and materials are mostly the same.

With the popularization and widespread use of industrial lighting and civil lighting, whether outdoor or indoor, family or commercial buildings and factories, lighting provides the guarantee of its normal operation.

Of course, nowadays, with the development of human society, environmental pollution has become a difficult problem in the world. In order to reduce the consumption of coal, such as coal used for power generation in thermal power plants, coal combustion pollutes the atmosphere very seriously. In order to save energy and protect the environment, LED lights and previous lighting methods have great advantages, except for energy. Besides providing brighter lights, it also contributes to environmental protection.

LED PCB Meaning

LED circuit board is a kind of printed circuit board. 

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LED PCB Board manufactureing

Both LED aluminium PCB and FR-4 fiberglass circuit board belong to PCB. To say differently, only compare LED aluminium substrate with FR-4 fiberglass circuit board.

LED aluminium substrate is printed on the surface of aluminium material with better thermal conductivity, and then weld electronic components on it.

In electronics, an LED circuit or LED driver is an electrical circuit used to power a light-emitting diode (LED). The circuit must provide sufficient current to light the LED at the required brightness, but must limit the current to prevent damaging the LED. 

The voltage drop across an LED is approximately constant over a wide range of operating current; therefore, a small increase in applied voltage greatly increases the current. 

Very simple circuits are used for low-power indicator LEDs. More complex, current source circuits are required when driving high-power LEDs for illumination to achieve correct current regulation.

An LED PCB board tends to generate a high volume of heat, making it difficult to cool via traditional means.

LED PCB Board Material - LED PCB raw material, LED bulb PCB raw material, LED strip PCB material

Metal core PCBs are often chosen for LED applications because they have enhanced heat dissipation capabilities. In particular, aluminium is usually used to make circuit boards for LED lamps. Aluminum substrates usually consist of thin layers of thermal conductive dielectrics that can be transported and have much more efficient heat dissipation than conventional rigid PCBs.

Compared with other electronic components, LED generates more heat, which requires PCB to heat very well. For this special feature, Metal Core PCB is often used in LED circuit boards, especially Aluminum Core PCB .

The following is the heat dissipation capacity of PCB plates of different materials, from weak to strong

1. FR4, common PCB board material;

2. Alumina substrate;

3. There is no doubt that the thermal conductivity of ceramic PCB is the best among many materials;

4. The thermal conductivity of alumina ceramic circuit board can be about ten times that of the aluminum substrate;

5. The thermal conductivity of Slyton aluminum nitride ceramic circuit board is ten times higher than that of alumina;

In this kind of ultra-high thermal conductivity, LED light attenuation will be greatly weakened, and its service life will be greatly increased.

LED Lighting PCB Assembly

Seeking LED PCB and Assembly? LED PCB Manufacturing and assembly; Led board made based on your PCB files. Turn-key services; 100% inspection.

Applications of LED PCB

PCB LED lights can be incorporated into numerous lighting applications due to their combination of excellent energy efficiency, low cost and maximum design flexibility. 

• Automotive headlights
• Airport runway landing lights
• Lighting used in military field
• Street lighting
• Highway tunnel lighting
• Photovoltaic (solar) lighting
• Flashlights and lanterns
• Traffic and signal lighting
• Lighting in hospital operating rooms
• High growth plant lighting
• Highway tunnel lighting
• Solar power products

If you have any questions about LED PCB Board, Please feel free to send us email. If you have final Gerber for production, welcome your inquiry.

Additional Information

Aluminum PCB for LED Light/Lamp/Tube
Aluminum PCB for LED
Aluminium Base LED PCB
LED Metal Core PCB
Metal Core PCB for LED
PCB industry cut into LED PCB heat sink aluminum substrate
Double Sided Aluminum PCB

LED PCB

LED PCB,LED Circuit Board,LED PCB Board,LED Printed Circuit Board

JingHongYi PCB (HK) Co., Limited , https://www.pcbjhy.com