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Introducing the new 12 inches (30 cm) continued Cool Ablaze Xenon White/Amber Yellow Dual-Color Switchback Flexible LED Band Lights, aggressive by the new Aston Martin DB9 with its advocate LED Daytime Active Lights that flash Xenon White during active and aswell action as about-face arresting lights in Amber Yellow color.

Each Audi Style LED band contains 18 pieces cool ablaze top ability 3-Chip SMD LED bulbs, there are 9 pieces Xenon White LEDs for daytime active ablaze approach and 9 pieces Amber Yellow LEDs for about-face arresting ablaze mode.

They are frequently acclimated for lighting up about the headlight lamps, fog lights or beneath the bonanza to accompany your car a beginning new European LED daytime active lights (DRL) attending and will aswell action as add-on about-face arresting lights such as the new Aston Martin DB9, aswell like Audi A5 Q7 Style LED Headlights and Mercedes S Class LED Fog Lights (aka LED Active Lights)

Highlights of these new advised Xenon White/Amber Yellow Dual-Color Switchback LED Ablaze Strips:

* It has two colors, Xenon White and Amber Yellow. Perfect for application as daytime active lights and about-face arresting lights.
* Waterproof design, accomplish it actual simple to adapt the car exoteric after annoying about any baptize damage.
* 3MSelf-adhesive band on the back, accomplish it actual simple to attach the LED band anywhere firmly.

The accession is SUPER EASY with artlessly base only. If you affix this affectionate of switchback LED band to banal bend ablaze ball harness, there will be no absurdity assuming on dashboard!   

What are the factors of the screen can be allowed to consider the user's premises area?
(1) The relationship of the the valid horizon and the actual field size;
(2) Pixel size and resolution;
(3) Unit base area is estimated;
(4) Screen mechanical installation and maintenance operations space;
(5) Screen angle distance.

The playback user needs what?
(1) The text: depending on the text size and differentiate needs;
(2) Video: 320 × 240 dot matrix;
(3) Digital standard DVD: ≥ 640 × 480 dot matrix;
(4) A complete computer video: ≥ 800 × 600 dot matrix;

Ambient brightness Screen brightness requirements?

The general brightness requirements are as follows:
(1) Indoor:> 800CD/M2
(2) Semi-indoor:> 2000CD/M2
(3) Outdoor (look northward):> 4000CD/M2
(4) Outdoor (sit facing south):> 8000CD/M2

Red, green and blue in white constitute what brightness requirements?

Red, green, blue and white couplers aspect contribution is not the same. The fundamental reason is due to the retina of the human eye

Film is different for different wavelengths of light feeling caused. After a large number of experimental test following about proportion, for the reference design:

Simple red, green and blue brightness ratio: 3:6:1
Precise red, green and blue brightness ratio: 3.0:5.9:1.1

Why the high-end full-color screen to use pure green tube?

Actual LED display production of high luminous efficiency but also to obtain rich vibrant color rendering three-color LED lamp, so that the area of ​​a triangle of color in the chromaticity diagram as much as possible in and close to the tongue-shaped spectral color curve, to meet the rich color and giving sufficient brightness and tongue-shaped curve leading to 515nm wavelength light wavelength close to 515nm pure green light LED tube end LED display selection, such as selection of 520nm, 525nm or 530nm wavelength light LED lamp .

Clear luminance and dot density conditions, how the brightness of the single-tube computer?

Calculated as follows: (two red, one green, one blue)
The red LED lamp brightness: brightness (CD) / M2 ÷ points /, M ² × 0.3 ÷ 2
Green LED lamp brightness: brightness (CD) / M2 ÷ Points / M2 × 0.6
Blue LED lamp brightness: brightness (CD) / M2 ÷ Points / M2 × 0.1

For example: 2500 points per square meter density 2R1G1B, per square meter brightness requirements for 5000 CD/M2, then:

The red LED light brightness: 5000 ÷ 2500 × 0.3 ÷ 2 = 0.3
Green LED lamp brightness: 5000 ÷ 2500 × 0.6 ÷ 2 = 1.2
Blue LED lamp brightness: 5000 ÷ 2500 × 0.1 = 0.2
The brightness of each pixel point: 0.3 × 2 +1.2 +0.2 = 2.0 CD

Why choose DVI display interface standard?

(1) Display Interface DVI display card interface is in line with the computer with international standards;
(2) Do not need to open the case, and to facilitate the installation;
(3) Memory, dynamic screen display capabilities;
(4) The ability of software and hardware compatible;
(5) Support all operating systems and application software, and flexibility;
(6) Mass production, low cost, easy maintenance.

Display with a laptop can control, and why?

Can not. Laptop graphics card built-in connection to the control system can not be realized, the BOE currently have a laptop with DVI interface, can achieve a notebook control.

Full Color use Nichia tube homemade pipe in addition to price what is the difference?

(1) Die: Nichia independent production die, the domestic pipe usually die in the United States or Taiwan;
(2) Package: Nichia's own package, no domestic production plants, more homemade pipe packaging manufacturers;
(3) Consistency: Nichia tube the same batch die wavelength difference is small, good consistency, consistency of homemade pipe is relatively poor;
(4) Life span: Nichia tube relatively long life, the homemade pipe attenuation is more serious;

Indoor module full color screen with SMD LED Full Color What is the difference?

(1) Light-emitting part: module full color screen display modules are generally more expensive as yellow-green, pure green module prices; SMD full color screen generally use pure green die;
(2) Display: module full color pixel visual feeling coarse, low brightness, easy mosaic phenomenon; SMD full color screen better consistency and higher brightness;
(3) Maintenance: module full color difficult to maintain, the entire module replacement costs; SMD full color easy to maintain, the single lamp repair and replacement;

Outdoor screen can paste table LED, and why?

Can not. The demanding outdoor screen installation structure, SMD LEDs unable to adapt to the harsh environment of the outdoors;

The higher outdoor screen brightness SMD LED outdoor screen brightness requirements can not be achieved.

Outdoor screen long production cycle Why?
(1) Procurement of raw materials: LED Lamp procurement cycle longer, especially imported die, order cycle takes 4-6 weeks;
(2) A complex production process: subject PCB design, casing production, filling plastic, tune white balance;
(3) Strict structural requirements: general cabinet design, wind, rain, lightning, etc. should be considered.

How to help the user to select the appropriate display?
(1) The need to display the content of;
(2) Visual distance perspective confirmation;
(3) Screen resolution requirements;
(4) To install environmental requirements;
(5) The cost of control;

The display's aspect ratio is how much?
The teletext screen: determine the content displayed;
Video screen: 4:3 or close to 4:3; ideal ratio of 16:9.
A control system capable of controlling the number of points?
Communication screen A card: monochrome, color 1024 × 64
Communication screen B card: the monochromatic: 896 × 512 two-color: 896 × 256
DVI color screen: 1280 × 768
DVI full color display: 1024 × 512

The design of the display size generally consider what factors?
In the design screen body size, there are three important factors:
(1) The need to display the content of;
(2) Floor space conditions;
(3) The display unit template size (indoor screen) or pixel size (outdoor screen).

The display should be added more than 10 kilowatts buck boot device.
Communication requirements: communication distance is long communication lines defined.
Model to display the installed communications line length standard used to install a communications line.
Prohibited and power lines of communication lines in the same line pipe alignment.
Installation requirements: screen installed around the level, do not allow backward
Lifting to the installation of the upper and lower adjustment lever
To be installed before the wall-mounted forward off the hook
Floor installation to add positioning support bolts.

Display power consumption indicators and power requirements?

The power consumption of the display is divided into the average power consumption and maximum power consumption. Average power consumption is also known as the work of power, it is usually the actual power consumption. The maximum power consumption is the power consumption during startup or full bright extreme cases, the maximum power consumption is the factor of the AC power supply (diameter, switches, etc.) must be taken into account. The average power consumption is generally 1/3 of the maximum power consumption.

The display is a large-scale precision electronic equipment, AC220V power input or its associated computer AC220V power input terminal must be grounded for safe use and reliable work.

Note: The computer AC220V power input ground terminal is connected to the computer chassis.
Display installation requirements?
Power requirements: power supply wiring point should be the size of the screen body within
220V mains powered Firewire 0 line ground wire;
380V mains powered Firewire 10 line ground wire;
The FireWire and 0 line wire cross-sectional area of ​​the same;
The display should be added more than 10 kilowatts buck boot device.
Communication requirements: communication distance is long communication lines defined.
Model to display the installed communications line length standard used to install a communications line.
Prohibited and power lines of communication lines in the same line pipe alignment.
Installation requirements: screen installed around the level, do not allow backward
Lifting to the installation of the upper and lower adjustment lever
To be installed before the wall-mounted forward off the hook
Floor installation to add positioning support bolts.

The design and installation of outdoor screen what issues should be considered?

Outdoor screen as follows:
(1) Screen installed outdoors, often exposed to the sun and rain, wind and dust cover, poor working conditions. Electronic equipment wet or excessive moisture can cause a short circuit or even a fire caused by the failure or even fire, resulting in the loss;
(2) The display may be affected by the strong electric magnetic attacks caused by lightning;
(3) The ambient temperature changes greatly. Display the work itself must produce a certain amount of heat, if the ambient temperature is too high heat and bad, the integrated circuit may not work properly, or even destroyed, so that the display system does not work;
(4) Wide audience, the line-of-sight requirements far and wide vision requirements; ambient light changes, in particular, may be exposed to direct sunlight.

Outdoor display must be done for the above special requirements:
(1) Screen and Screen with the construction of the junction must be strictly waterproof caulk; the screen body must have good drainage measures, in the event of a smooth water emissions;
(2) On the screen and buildings to install lightning protection devices. Display main body and cover a good grounding resistance is less than 3 ohms, caused by lightning current discharge in time;
(3) Installation of ventilation equipment cooling, so that the screen body internal temperature between -10 ℃ ~ 40 ℃. Behind the top of the screen to install the axial fan, exhaust heat;
(4) The selection Operating Temperature -40 ℃ ~ 80 ℃ between industrial grade IC chip to prevent winter temperature is too low so that the display can not start. ;
(5) In order to ensure that in the case of strong ambient light, distance visual selection of ultra high power led light-emitting diode;
(6) Media use of a new wide angle tube, wide viewing angle, color pure, consistent coordination, the life of over 100,000 hours. Medium outer package with the most popular cover along the square cylinder the silicone seal metalization assembly; exquisite beauty of its appearance, durable, anti-sunlight, dust-proof, waterproof, anti-high temperature, anti short circuit "Five Anti" features.   

Discussion and Prospect: High Power LED Package Cooling Technology

For a long time, the led heat requirements are not very high case, led more than traditional resin substrate and encapsulation. However, with the market expanding applications continuously improve the level of demand, the The traditional resin substrate after the arrival of the high-power led generations, has gradually inadequate. Therefore, to explore and prospect of high power led packaging materials, has become a hot topic of concern to the industry.

LED cooling principle studies have shown that high power led only 20% of the electrical energy into light energy, the rest will be lost in the form of heat. Up to 80% of the heat energy can not be lost, then led the life will be greatly reduced. led the heat exactly how lost it?

LED cooling capacity usually by encapsulation mode, and the thermal conductivity of the material of the package, the thermal path nor outside conduction, convection, and radiation of these three. As the heat led packaging materials accumulate in the conduction loss package material selection becomes particularly important.

Traditional media is unable to meet the high power led heat demand

With the the market growing number of high-power led applications appear, while considering how lost heat, but also on the stability and continuity of led light. If the heat energy of the LEDs can not be lost, as soon as possible so the brightness and lifetime will decrease rapidly. So, for high power led, traditional epoxy resin by its features are limited, no longer meet the cooling needs.

LED low power or power under conditions of use, the epoxy resin thermal conductivity is lower and the disadvantage of poor heat resistance have not yet been fully apparent. But use epoxy resin material as encapsulated high power led, is likely to appear before the led chip life has not been reached, the epoxy resin has been unsustainable.
In addition, not only the cooling phenomenon causes the epoxy resin changes, even the short wavelength also epoxy causing distress. This is because the white LED emission spectrum also includes the short wavelength light, while epoxy resins are susceptible to the short wavelength light in the white led destruction. Even low-power white led epoxy destruction can exacerbate, not to mention the issue of high power white led short-wavelength light more deteriorated naturally more rapid and severe. Thus, finding new material to replace epoxy encapsulated high power led imminent.

LED heat sink substrate type

At present, the common LED type of heat dissipation board comprising: a rigid printed circuit board, a high thermal conductivity aluminum plate, a ceramic substrate, a flexible printed circuit board, metal composites, and the like.

The rigid printed circuit board (printedcircuitboard; PCB) used for various electronic substrate, LED controller but can not afford the dissipated heat out of the high power led, so applications limited to the low power and the general power LED does not have to high-power LED The possibility of extending the application.

The high thermal conductivity aluminum plate (metalcorePCB; mcPCB) is the PCB below the base material instead of aluminum alloy, general, pure aluminum heat coefficient than aluminum, but because of the hardness of pure aluminum is not high cause difficulties in the use so only when making aluminum substrate material.

Ceramic substrate three, al2o3 (alumina), ltcc (low temperature co-fired ceramic), the aln (AIN). Technical standards alone, no doubt to aluminum nitride highest low temperature co-fired ceramic followed. Led substrate, produced by low-temperature co-fired ceramic heat better, and the high temperature, moisture resistance, etc., but its price is higher than the traditional board several times, until today is still not ideal for production of heat-type substrate material. Of course, if you do not consider the price factor, the ceramic substrate or a well-deserved first choice.

Flexible printed circuit board (fpc) ​​has the advantages of light weight, thin, flexible, flexible use of space, and the coefficient of thermal conductivity is superior to the traditional the the PCB substrate and mcPCB substrate and application area larger than the ceramic substrate. However, the technology is still at the experimental stage, the yield is low, and so could not be put into large-scale.

Metal substrate to become the preferred high-power led

Through the above comparison, the most cost-effective due to the metal substrate relative terms, so it has also become the preferred solution led high power conditions. With footsteps led chips, large-scale, high-current, high-power development, to replace the traditional metal package substrate resin package substrate will be faster.

The purpose of the high heat metal substrate material, can be divided into rigid and flexible two. The LED controller structure, the rigid substrate is a conventional metal material, using a metal such as aluminum, copper, high thermal conductivity of the insulating layer portion is mostly populated inorganics. This metal substrate has a high thermal conductivity, high heat resistance, as well as electromagnetic shielding, etc., and its thickness is usually greater than 1 mm, it is widely used in which the LED lighting module and the lighting module, and contribute significantly to the high power LEDs in the lights the promotion and popularization.

Flexible substrate promising

In general, the efficiency of the thermal conductivity of the metal package substrate about 2w / m • k. But because of the higher thermal requirements of high efficiency led, so in order to meet the efficiency of the thermal conductivity of the 4 ~ 6w / m • k, has the efficiency of the thermal conductivity more than 8w / m • k metal package substrate. The rigid metal packaging substrate to meet high power led package each package substrate manufacturers are actively developing the technology can improve the efficiency of the thermal conductivity.

However, the metal package substrate has the same great disadvantage of metal thermal expansion coefficient the the LED controller when welding with low thermal expansion coefficient of the ceramic chip vulnerable to the impact of thermal cycling, so when the aluminum nitride packaging, metal packaging substrate disharmony may occur, and is therefore necessary to overcome the difference of thermal stress between the led in a variety of different thermal expansion coefficient material, and to improve the reliability of the package substrate.

Flexible substrate appears precisely to solve the above problems. The highly thermally conductive flexible substrate, on the insulating layer-adhesive metal foil, Although the basic structure of the conventional flexible substrate are identical, but in the insulating layer, LED controller is the soft epoxy resin filled with thermally conductive inorganic substance and therefore has a high thermal conductivity of 8w / m? k, and also both the advantages of the soft, flexible and high reliability. In addition, the flexible substrate is also in accordance with customer demand, single-sided single-layer board design into a single-sided double-layer, double-sided double-layer board. According to the experimental results show that the use of high thermal conductivity flexible substrate led temperature can be reduced by approximately 100 degrees Celsius, which can greatly improve the service life of the led.   

GreenChip Resonant Controller Support 400W High Power LED Applications
NXP Semiconductors announced SSL4120 GreenChip is an integrated power factor correction (PFC) half-bridge resonant controller can support up to 400W high power LED application.

Single chip SSL4120 is a efficient solutions for high power LED applications, such as office lighting, shopping malls lighting, high-bay and low bay lighting, parking lot lighting, square lighting and street lighting. The SSL4120 completely support mains applications, to support the efficient start directly from the rectified universal mains voltage range of 90-305 volts. Low total harmonic distortion (THD), the SSL4120 support less than 10% higher than the 0.97 high power factor (PF) and the typical PFC 380 kHz frequency to meet and exceed the traditional requirements of high-power LED lighting applications. NXP will showcase its latest SSL drive chip, green chip series in the Hong Kong International Lighting Fair (Booth No. 5B-C12).

Mr. Ryan Zahn, general manager of NXP Semiconductors global lighting solutions product line, "whether indoors or outdoors, worldwide commercial, industrial and street lighting applications are increasingly demanding requirements of high-power LED solutions. the SSL4120 single LED chip integrated power factor correction controller and a resonant half-bridge converter, and markets high-performance LED driver power supply design elegant, cost-effective solutions. "



The SSL4120 the main characteristics

• Single-chip integrated PFC and half-bridge resonant converter (HBC) controller
• Designed for 75 to 400 W high power LED application design
• True from 90 to 305 V universal mains operation
• Low THD (10%) and high PF (0.97)
• Resonant topology and bottom / zero voltage switching to achieve high performance (> 93%)
• 380 kHz typical PFC frequency in accordance with THD laws and regulations
• compact, you can use a minimum of external components to start the most efficient design
• PFC is critical for real-time control mode
• HBC burst switch
• Full range of protection, including overcurrent protection (OCP), overvoltage protection (OVP), degaussing detection, open circuit protection, capacitive mode protection and general lockout protection input, even in harsh operating conditions, but also to ensure the safety of the work.

Time to market
The the SSL4120 resonant controller is NXP's latest high-power LED driver chip, currently in volume production, the sample is also forthcoming. Other high power LED green chip solutions include the award-winning the SSL4101, which is an integrated PFC flyback controller to adapt to a power range of 25 to 150 W