First, outdoor lighting designers must consider the working environment of outdoor LED lamps
Due to the complicated working environment, LED outdoor lighting fixtures are affected by natural conditions such as temperature, ultraviolet light, humidity, rain, rain, sand, and chemical gases. Over time, the LED light is seriously degraded. Therefore, in the end, outdoor lighting designers should consider the impact of these external environmental factors on LED outdoor lighting when designing.
Second, outdoor LED lamps should pay attention to the selection of heat dissipation materials
The outer casing and the heat sink are designed to be integrated to solve the heating problem of the LED. This method is better, generally aluminum or aluminum alloy, copper or copper alloy, and other alloys with good heat conductivity. The heat dissipation has air convection heat dissipation, strong wind cooling heat dissipation and heat pipe heat dissipation. (Jet cooling heat dissipation is also a kind of heat pipe cooling, but the structure is more complicated.)
The choice of what kind of heat dissipation method has a direct impact on the cost of the luminaire should be considered comprehensively, and the best solution should be selected in conjunction with the design product.
The design of the lampshade is also very important. Currently, there are transparent plexiglass, PC materials, etc. The traditional lampshade is a transparent glass product. What kind of material is selected is related to the design of the product grade. Generally speaking, the outdoor lamp The lampshade is preferably a traditional glass product, which is the best choice for long-life, high-end lamps. The lampshade made of transparent plastic, plexiglass, etc. is better for the indoor lamp, and the outdoor life is limited. Because of the outdoor sunlight, ultraviolet light, sand dust, chemical gas, temperature difference between day and night, etc., the aging life of the lampshade is shortened. Secondly, the pollution is not easy to clean and clean, so that the transparency of the lampshade reduces the light output.
Third, the packaging technology of outdoor LED chips
At present, LED lamps (mainly street lamps) produced in China are mostly assembled by using 1W LEDs in multiple strings and parallels. This method has higher thermal resistance than advanced packaging technology and is not easy to produce high-quality lamps. Or it can be assembled with 30W, 50W or even larger modules to achieve the required power. The packaging materials of these LEDs are encapsulated in epoxy resin and encapsulated in silicone. The difference between the two is that the epoxy resin package has poor temperature resistance and is prone to aging over time. The silicone package is better in temperature resistance and should be selected when using.
It is better to use a multi-chip and a heat sink as a whole package, or to use an aluminum substrate multi-chip package and then connect the phase change material or heat-dissipating grease to the heat sink, and the thermal resistance of the product is higher than that of the product assembled with the LED device. Less one to two thermal resistance, which is more conducive to heat dissipation. For the LED module, the module substrate is generally a copper substrate, and the connection with the external heat sink should use a good phase change material, or a good heat dissipation grease to ensure that the heat on the copper substrate can be transmitted to the external heat sink in time. Going up, if the processing is not good, it is easy to cause the heat to accumulate and the temperature of the module chip rises too high, which affects the normal operation of the LED chip. The author believes that: multi-chip package is suitable for the manufacture of general lighting fixtures, module packaging is suitable for space-limited occasions to manufacture compact led lamps (such as headlights for automotive main lighting, etc.).
Fourth, the research on the design of outdoor LED lamp radiators is a key component of LED lamps. Its shape, volume and heat dissipation surface area should be designed to be beneficial. The radiator is too small, and the working temperature of the LED lamp is too high. It affects luminous efficiency and longevity. If the radiator is too large, the consumption of materials will increase the cost and weight of the product, and the competitiveness of the product will decrease. It is important to design a suitable LED light radiator. The design of the heat sink has the following parts:
1. Identify the power that the LED lights need to dissipate heat.
2. Design some parameters for the heat sink: the specific heat of the metal, the thermal conductivity of the metal, the thermal resistance of the chip, the thermal resistance of the heat sink, and the thermal resistance of the surrounding air.
3. Determine the type of dispersion, (natural convection heat dissipation, strong wind cooling, heat pipe cooling, and other heat dissipation methods.) From the cost comparison: natural convection cooling lowest cost, strong wind cooling medium, heat pipe cooling cost is higher, jet cooling The highest cost.
4. Determine the maximum operating temperature allowed for the LED luminaire (ambient temperature plus luminaire approval temperature rise),
5. Calculate the volume and heat dissipation area of ​​the heat sink. And determine the shape of the heat sink.
6. Combine the radiator and LED lamp into a complete luminaire, and work on it for more than eight hours. Check the temperature of the luminaire under the environment of room temperature 39 °C - 40 °C to see if the heat dissipation requirements are met to verify whether the calculation is correct, if not If the conditions of use are met, the parameters are recalculated and adjusted.
7. The seal of the radiator and the lampshade should be waterproof and dustproof. The rubber pad or silicone rubber pad should be padded between the lampshade and the heatsink. It should be fastened with stainless steel bolts to make the seal waterproof and dustproof. Points to note, with reference to the latest outdoor lighting technical specifications promulgated by China, as well as urban road lighting design standards, this is the essential knowledge of outdoor lighting designers.
PCB Prototype
Introduction
What is PCB prototype and why use a PCB prototype
Prototype to production: Building your first PCB prototype (prototype Printed Circuit Board) ... PCBs (Printed Circuit Boards) are the heart and brains of every product that turns on, plugs in, or lights up. They contain electrical components that determine the behavior of your product, and come in all shapes and sizes.
Prototyping your PCB beforehand can help you avoid such a situation. Engineers use prototype PCBs early in the design process to test the functions of a PCB-based solution. They often order multiple runs of prototypes to test redesigns or test a single function before moving on to a more complex design.
What Are the Benefits of Circuit Board Prototyping?
We recommend you PCB prototyping service for function testing of new products prior to making a commitment to a full-production run. Benefits of developing PCB Board prototype include:
Rapidly test and correct designs if there is any mistakes - After waiting over a week for your full boards, you`ll be eager to get them going in your applications. When you test your design beforehand with PCB prototypes, you can do just that.
Potentially detect any design flaws in the early stages - The time to find out mistakes in your design is not when you have a full production run in your warehouse. PCB prototyping service allows you to spot any design problems in a few days, make adjustments and perfect the design before ordering your full run.
Order low-quantity production runs featuring a MOQ of only five boards if necessary - Save money and reduce risks by putting off your big orders until you know you have the type of boards you want.
Benefit from lower production tolerances - It offers a clear indication of how well your PCB will perform
Once your prototype boards have demonstrated their ability to meet your quality and performance requirements, you are ready for a full production run. Then we will transition from PCB Prototype Board service to Standard PCB service, which provides tighter production tolerances and more advanced options, including a free Design for Manufacture (DFM) check that is capable of detecting potential issues that could reduce the quality of your PCB.
While it may be tempting to simply order your full printed circuit boards and decide you`ll deal with any design flaws that arise as they come, it`s rarely the most efficient solution. You may get the boards out sooner, but if something goes wrong, it could prove to be a lot costlier and more time-consuming than taking an extra few days to test a prototype.
Save Time and Money in the Long Run With PCB Rapid Prototyping Services from JHY PCB
PCB prototyping is the best practice method used world-wide to verify the quality of a design before proceeding. In the past, some companies may not have had time to develop a Prototype PCB , wait for the assembler to put that PCB prototype together and then test it. However, thanks to the rapid PCB prototyping offered by JHY PCB, this is no longer an issue. You can send in your prototyping PCB board design and have a Fast PCB Prototype in a week or less, giving you plenty of time to test your PCB Prototype Board to fully prepare for your regular production run.
PCB Prototype & PCB Fabrication Manufacturer and service
What is PCB fabrication?
Printed Circuit Board (PCB) fabrication is the assembly method for circuit boards used in electronic and computer devices. The layers of the board are put together along with the specific surface pattern so it can be used in electronics manufacturing.
JHY PCB, China pcb manufacturer offers PCB prototype and fabrication service with 100% quality guarantee, offers 24 hours Quick Turn PCB prototype and Reliable small-batch PCB (Low Volume PCB Prototyping) production, affordable price and best service.
Prototype PCB Service vs. Standard PCB Service
Use pcb prototype service when you want:
Boards for design review or preproduction quality testing - Our PCB prototype service is the perfect way to make sure there are no errors in your design before moving into mass production.
Rapid PCB turnaround - Rapid PCB prototyping means you get your boards fast.
Boards with eight or fewer layers - Because we are trying to get your boards back to you as fast as possible, we offer rapid PCB prototyping for boards with no more than eight layers.
FR-4 boards - Your printed circuit board prototype will come on standard FR-4 material.
Quality standard IPC1 boards
Use Standard PCB service if you need:
Boards for full production - Once you know that your design works, you can contact us for standard PCB service for full production for use in your applications.
Slightly longer turnaround time - Since these are the boards you will actually be using, it takes a little longer to make sure we get everything just right. However, now that you have tested the design, you can go right into your projects once you get your boards.
Boards with up to 9-32 layers - We have much more flexibility with materials and layers once we have the time to develop your full boards.
FR-4, Aluminum PCB , Metal Core PCB , Flexible PCB , Rigid Flex PCB , Double Sided PCB , PCB Stencil , or other types of boards.
Quality standard IPC2 boards
Cheap Fast PCB Prototype
As a China Prototype PCB manufacturer, We are not only offer high-quality products and services, We also provide Cheap and Fast PCB Prototype.
JHY PCB can produce Fast PCB Prototype correctly & quickly& cost-effectively. Various options of lead time can be offered, such as 24 hours,48 hours,72hours, etc. We always make our promise happen! Once you release first Prototype Board order, you will find out that we are the right partner you are looking for.
Advantages
- Discover potential design errors in the beginning.
- Proto PCB can help you to test design rapidly, so any mistake can be revised at once.
- Quick turn PCB, shorter time.
- Smaller quantity, MOQ.
- Lower cost.
- Flexible reaction.
Please see what we can do in our PCB Prototype Board manufacturing capability below. Prompt reply will be offered for your any questions. Accurate quotation will be subject to your Gerber, specifications and delivery time.
|
Item |
Manufacturing Capability |
|
Number of Layers |
1 - 8layers |
|
Order Quantity |
5pcs - 100pcs |
|
Laminate |
FR-4 Standard |
|
Maximum PCB Size(Length x Width) |
600*1000mm |
|
Board Dimensions tolerance |
±0.1mm - ±0.3mm |
|
Board Thickness |
0.4mm - 4mm |
|
Board Thickness Tolerance |
±0.1mm - ±10% |
|
Copper Thickness |
1-6OZ |
|
Min Tracing/Spacing |
2mil/2mil |
|
Solder Mask Color |
Green, White, Blue, Black, Red, Yellow |
|
Silkscreen Color |
White, Black |
|
Surface Finish |
HASL, LF HASL, ENIG |
|
Test |
Flying probe, Testing Fixture |
Additional Information
Prototype Metal Core PCB
PCB Prototype Manufacturing Capability
Double Sided PCB Board Prototype
HDI Technology PCB Prototype
Metal Core PCB Prototyping
Prototype PCB SMT Stencils
Rigid Flex PCB Prototype
PCB Prototype
Prototype PCB,Prototype Board,PCB Prototype Board,Custom PCB Prototype
JingHongYi PCB (HK) Co., Limited , http://www.pcbjhy.com