For LED display production and installation of technical information.
Author:Ma Chunyun Time:2021-06-10 09:32 Browse(792)
This article is suitable for electricians and technicians, including college graduates majoring in electronics. As this tutorial involves strong electricity, please pay attention to safety. catalogue
This article is suitable for electricians and technicians, including college graduates majoring in electronics.
because this course involves strong current.
please pay attention to safety.

For LED display production and installation of technical information.

contents ­ 1. Overview of LED bar screen ­ 2. Bar screen application: ­ 2.1. Advertising application: new media.
new effect, new business ­ 2.2. System integration -- secondary development ­ 3. Significance of assembly ­ 3.1. Screen composition ­ 3.1.1. Unit board ­ 3.1.2. Power supply ­ 3.1.3. Control card ­ 3.1.4. About 16pin 08 interface ­ 3.1.5. Connection ­ 3.2. Accessories production ­ 3.2.1. Production of cable (data line) ­ 3.2.2. Production of power cord ­ 3.2.3. RS232 cable production ­ 3.3. Wiring guidelines ­ 4. Software instructions - led-update ­ 4.1. Simple steps ­ 4.2. Detailed description of led-update ­ 4.2.1. Setting screen parameters ­ 4.2.2. Save the batch information to the screen,Auto cycle display ­ 4.2.3. Delete information ­ 4.2.4. Sending independent information ­ 4.2.5. Save and open the list ­ 4.3. Software description and image replacement ­ 5. Frame making ­ 5.1. Fabrication of support ­ 5.2. Simple frame production process ­ 5.3. Production process of stainless steel frame ­ 5.4. Aluminum alloy frame ­ 6. Troubleshooting ­ 6.1. No display ­ 6.2. Display confusion ­ 6.3. Unable to update screen data ­ 7. Tools and accessories to teach you how to assemble LED bar screen ­ 1. Overview of LED bar screen ­ LED screen,As a new media, the movement of light-emitting graphics and text, easier to attract people's attention, large amount of information, update at any time, has a very good advertising and notice effect.
LED screen is more simple than neon light.
easy to install and use, more effect changes, can update content at any time, is a good indoor and outdoor visual media.
LED screen belongs to high-tech electronic products.
the price is relatively high, In the past, it was mainly used in the government and units.
with the continuous progress of technology,
the price is constantly decreasing, and the assembly and maintenance are easier.
small LED strip screen.
because of its cheap price, simple installation and use, it has been accepted by the public for a long time, and gradually entered the stores of large and small size, the application is more popular, and gradually began to be popularized.
in the past, it has been widely used in the government and units ­ ­ 2. Bar screen application: ­ 2.1. Advertising application: new media.
new effect, new business ­ As a new media and a new decorative material, LED strip screen can be embedded in many interior decorations to make the decoration more dynamic. The constantly updated subtitles can be used as a new notice board, Promotional offers and promotional information, etc.
greatly improve the grade of interior decoration.
has a good visual effect.
because the installation and use of LED bar screen has a certain technical content.
restricts the development of the advertising industry.
mastering LED technology can improve the technical content of interior decoration and expand business.
this paper introduces the development of LED bar screen in advertising industry ­ ­ 2.2. System integration -- secondary development ­ LED bar screen.
due to its simple control, it is embedded into all kinds of devices for the public.
the font is large.
it is dynamic and informative, so it is suitable for long-distance viewing, timely broadcasting the latest news to the public, and attracting the public's attention.
the LED bar screen has the advantages of simple control and large font sizeIt is widely used in queuing system.
station reporting system, water dispenser, etc.
LED strip screen control card has simple and stable functions, and can be easily embedded into the system, which saves developers the tedious work of developing LED display and focuses more on the system function and innovation.
the LED strip screen control card development kit provides detailed development examples, It provides a good environment for your system integration and secondary development ­ ­_ 3. Significance of assembly ­ The LED industry chain has been very perfect.
all the accessories can be easily bought online. The technical parameters of LED are becoming more and more unified, the industry standards are basically formed, and all the spare parts have been modularized.
it lays the foundation for self assembling LED screens.
due to the low cost of materials and high retail price, when purchasing from LED screen suppliers in batch, the price of LED screen is low, The cost and price are not easy to control.
the end users are not familiar with LED screens.
they need the installation and maintenance services provided by the suppliers, so they can get the maximum profit by assembling LED screens and selling them locally.
in order to improve the quality of LED screens, it is necessary to provide the installation and maintenance services ­ For example: assemble a 128x16 single red indoor LED screen.
update the content of the screen by connecting the PC serial port ­ 3.1. Screen composition ­ Let's first understand the composition of LED strip screen, unit board, power supply, control card and wiring ­ ­ Back of unit board ­ ­ Front of unit board ­ _ ­ Switching power supply and LED strip screen control card ­ ( Picture of each accessory) ­ 3.1.1. Unit board unit board is one of the core components of LED display, and the quality of unit board directly affects the display effect.
the display effect of unit board is affected by the quality of unit boardThe unit board is composed of LED module.
driver chip and PCB circuit board.
LED module.
in fact, it is composed of a lot of LED light-emitting points, which are encapsulated in resin or plastic ­ The driver chips are mainly 74HC595, 74hc245 / 244, 74HC138 and 4953.
the driver chips are mainly 74HC595, 74hc245 / 244, 74HC138 and 4953 ­ The commonly used unit board specifications of indoor strip screen are as follows: ­ Parameters: D=3.75; The distance between dots is 4.75mm, 64 dots wide x 16 dots high.
1 / 16 scan indoor brightness.
single red / red green dual color ­ Parameter explanation: ­ Luminous diameter: refers to the diameter of the luminous point, d=3.75mm ­ The distance of the light spot is 4.75mm, which is selected according to the distance of the viewer.
indoor 4.75mm is generally selected ­ Unit board size: 64x16 --- the most commonly used unit board, which is the easiest to buy and the cheapest price.
the size of unit board is 64x16 ­ 1 / 16 scan: the control mode of the unit board.
1 / 16 scan: the control mode of the unit board ­ Indoor brightness: refers to the brightness of LED light points.
indoor brightness is suitable for the environment that needs to be illuminated by fluorescent lamps in the daytime.
indoor brightness: refers to the brightness of LED light points ­ Color: single red.
is the most commonly used color, and the price is the cheapest.
two colors generally refer to red and green.
the price is high.
Color: single red ­ If you want to make a 128x16 point screen.
you only need to connect two unit boards in series.
you can make a 128x16 point screen ­ ­ _ 3.1.2. Power supply ­ Generally, switching power supply is used.
220 V input, 5 V DC output.
it should be pointed out.
because LED display screen belongs to precision electronic equipment, switching power supply should be used instead of transformer.
for a single red indoor 64x16 unit board.
the LED display screen is a kind of precision electronic equipmentWhen it is fully on, the current is 2A ­ Reasoning out.
when the 128x16 dual color screen is full bright, the current is 8A.
5v10a switching power supply should be selected.
when the 128x16 dual color screen is full bright, the current is 8A ­ 3.1.3. Control card ­ We recommend the use of low-cost strip screen control card.
it can control 1 / 16 scan 256x16 two-color screen, and can assemble the most cost-effective LED screen.
the control card belongs to asynchronous card.
that is to say, the card can save information without power-off, and can display the information stored in it without connecting to PC.
this paper introduces the design of the control card ­ For details, please refer to the user manual of the control card.
the user manual of the control card can be used for reference http://www.smsled.com/ ­ When purchasing unit boards.
please ask for clear parameters. The 100% compatible unit boards are as follows: ­ 08 interface 4.75mm point distance 64 points wide x 16 points high, 1 / 16 sweep indoor brightness.
single red / red green dual color ­ 08 interface 7.62mm point distance 64 point width x 16 point height.
1 / 16 scan indoor brightness.
single red / red green dual color ­ 08 interface 7.62mm point distance 64 point width x 16 point height.
1 / 16 half outdoor brightness.
single red / red green dual color ­ ­ _ The control card adopts 16pin 08 interface ­ 3.1.4. As for 16pin 08 interface, there are many manufacturers of unit board and control card.
so there are many interface styles of unit board. When assembling LED screen, we must first determine the consistency of the interface to facilitate assembly.
here we only introduce the most commonly used LED interface: LED industry number: 16pin 08 interface: his interface sequence is as follows: ­ 2abcdg1g2stbclk161nnnenr1r2nn15 interpretation: ­ ABCD is the line selection signalSTB (LT) is the latch signal, CLK (CK) is the clock signal, R1, R2, G1, G2 are the display data, en is the display enable, n is the ground (GND).
confirm that the interface between the unit board and the control card is consistent.
then it can be directly connected.
if it is inconsistent.
you need to make your own switching line (the sequence of switching one line) ­ 3.1.5. Connection ­ It is divided into data line, transmission line and power line.
the data line is used to connect the control card and the LED unit board. The transmission line is used to connect the control card and the computer.
the power line.
is used to connect the power and the control card, the power and the LED unit board.
the copper core diameter of the power line connecting the unit board is not less than 1 mm ­ 3.2. Accessories production ­ 3.2.1. Production of cable (data line) ­ The cable is similar to the data cable in the computer case.
only the width of the cable is a little different.
you can buy relevant materials in the computer city.
to make the cable.
you need a tool, that is, special pliers (pictures), which can greatly improve the work efficiency and yield.
the materials for making the cable are: cable head.
cable head, If you want to make a 16pin (16 wire) cable, you need to buy a 16pin cable and a corresponding size cable head and cap.
production steps.
use scissors to cut the end of the cable, and then put the end of the cable (pay attention to the balance between the line and the head), and then put it into the center of the crimper, press it hard, and then wind the cable, It is very important to install the cable cap.
the cable cap can effectively protect the cable, make the cable more solid, and do not save.
it is necessary to install the cable cap ­ ­_ ( Pincers (accessories for photo wiring) ­ 3.2.2. The power supply is divided into 220 V power supply and 5 V power supplyThe 220 V power cord is used to connect the switching power supply to the commercial power supply.
it is better to use the 3-pin plug, which can be bought in the hardware store.
here we focus on the power cord of 5 V DC.
because the current of 5 V is relatively large, it is better to use the red and black pair wire with copper core diameter of more than 1 mm (red and black must be used).
if possible.
it is better to install metal parts on both ends of the wire ­ ­ _ ( (as shown in the figure) ­ 3.2.3. RS232 cable make RS232 cable, which is used to connect computer and control card, and update screen data.
DB9 head and network cable (which can be bought in computer city) are needed here.
carefully observe DB9 head.
if there are numbers on it, connect 5 to brown, and connect 3 to brown white.
clamp the network cable.
install it in DB9 head.
(it's very important here.
be sure to clamp it, and pull it yourself a few times, Then use a multimeter to measure whether the two ends are connected.
it needs to be pointed out here.
the DB9 head is divided into male head and female head.
the back of the computer belongs to the female seat.
so you need to buy a male plug corresponding.
if you don't understand, please carefully observe your PC.
now the notebook generally does not have a serial port.
please buy a USB to RS232 serial port cable ­ ­_ ( Accessories of DB9) ­ 3.3. For the first installation of the wiring guide, please strictly follow the steps to reduce the occurrence of errors.
this is the first installation of the wiring guide ­ Step 1: check the power supply voltage.
find out the positive and negative connection of DC to the switching power supply, connect the 220 V power line to the switching power supply, (after confirming the connection, connect it to the AC or NL terminal) and plug it inYou will find that a light of the power supply will be on.
then use a multimeter to measure the voltage between V + and V -. Make sure that the voltage is between 4.8v-5.1v. There is a knob beside which you can adjust the voltage with a cross screwdriver.
in order to reduce the screen heating and prolong the service life.
in the case of low brightness requirement, The voltage can be adjusted to 4.5v-4.8.
after confirming that there is no problem with the voltage.
disconnect the power supply and continue to assemble other parts.
the power supply can be adjusted to 4.5v-4.8 ­ Step 2: turn off the power first.
connect the V + to the red line.
connect the V - to the control card and the LED unit board respectively, and the black line is connected to the GND of the control card and the power supply.
the red line is connected to the + 5V of the control card and the VCC of the unit board.
each unit board has one power line.
after completion.
please check whether the connection is correct ­ ­ Power connection diagram ­ Step 3: connect the control board and the unit board.
use the prepared cable to connect.
pay attention to the direction.
it cannot be connected reversely.
Please note.
the unit board has two 16pin interfaces, one is input, one is output, and the one near 74hc245 / 244 is input. Connect the control card to the input.
the output is connected to the input of the next unit board.
the control card is connected to the input­ _ Step 4: connect the RS232 data cable.
connect one end of the prepared data cable to the DB9 serial port of the computer, the other end to the control card, connect the 5-pin (brown) of DB9 to the GND of the control card, and connect the 3-pin (brown white) of DB9 to the rs232-rx of the control card.
if your PC does not have a serial port.
you can buy a USB to RS232 serial port conversion cable in the computer city.
if your PC does not have a serial port­ ­ Step 5: check the connection again.
the black line connects - V and GND.
the red line connects + V and VCC + 5V ­ Step 6: turn on the 220 v.
under normal conditions, the power light is on, the control card is on, and the screen is displayed.
if it is not normal.
please check the wiring.
or check the troubleshooting.
if it is not normal.
please check the wiring ­ Step 7: open the downloaded software.
set the screen parameters and send subtitles.
refer to the software instructions for details ­ If two unit boards appear on the screen to display the same content.
please set the screen size to 8 Chinese characters by using the software.
please set the screen size to 8 Chinese characters ­ 4. Software instructions - led-update ­ ­ To http://www.smsled.com/ Download­ Figure 2-1 ­ 4.1. Easy to use steps: 1. Select the PC serial port connected to the control card ­ 2 click "send directly to screen". "
the status bar displays" send OK " ­ 3 screen immediately displays "enter display information here" ­ 4.2. Detailed description of led-update: ­ 4.2.1. Setting screen parameters ­ Click set screen parameters ­ ­ Figure 2-2 ­ 1 [reset number password] input password, the default password is 123456, 2 check 2 ­ 3 select [screen size], [new screen number] ­ 4. After confirming that there is no error, click send settings ­ 4.2.2. Save the batch information to the screen and display automatically ­ 1 in the information box [input display information here],Enter the content to be displayed, select effect and repeat times, and then press submit to list to save the information to the list.
click submit to list ­ 2 repeat the first step.
2 ­ 3 Click Save list to screen.
save the information in the list to the screen, so that the information will not be lost even if the power is off ­ 4.2.3. Delete information ­ 1. To delete all the information on the screen, select [delete all], and then click delete information ­ 2 if you want to delete the information of a certain location, in [delete all], select the location you want to delete, and click delete information> 2 ­ 4.2.4. Send independent information.
the ­ 1 in the information box.
enter the content you want to display.
1 ­ 2. Select [don't save].
and [don't save] will be displayed temporarily, and the power failure will disappear Add] save to the screen, will not cover the existing information; [ Select [record No.] to save the information to the specified location. If there is information in the location, it will be covered.
select [record No.] to save the information to the specified location ­ 4.2.5. Save and open the list ­ Click Save list.
to save the list as a file.
Click Save list ­ Click open list.
to open the existing list file.
click open list ­ 4.3. Software description and image replacement ­ If you want to replace the image of the software with your favorite image.
please replace the image files head.bmp and updata.bmp under the program directory with the images you need.
you can use Notepad to open oem.dll and modify the contents.
write your contact information in it.
the following is a list of the pictures you want to use ­ 5. Frame making ­ Frame classification: bracketSimple frame, stainless steel frame ­ 5.1. Fabrication of support ­ According to different applications, the requirements of the outer frame are different. Let's first talk about the embedded installation, which does not need the outer frame, but needs a mounting bracket.
generally, the mounting bracket is made of aluminum profile.
it is relatively light, It's easy to cut and process.
we can also use the universal angle iron (that is, the rectangular iron bar with many holes).
we can see that there is a copper column for installation on the back of the unit board.
it's used to fix the unit board on the bracket. The bracket should be longer and the installation hole of the light box should be reserved.
fix the unit board.
the control card and power supply are all fixed on the bracket, and the data line and 220 V power line should be tied on the bracket, The simplest screen is assembled.
it can be installed on other devices.
such as light box.
we will find that the brightness is different, or there may be water spray in the application situation. At this time, we need to paste a plexiglass on the screen surface, and the plexiglass is generally tan, Or dark red.
plexiglass can be bought in advertising and decoration materials stores.
it's bought by weight.
we use thinner ones.
too thin may be easy to bend.
here we need to remind.
as the cutting of plexiglass requires skill, it's better to prepare the size when you buy it and let the store cut it for you.
for general occasions.
you need a box, We can use aluminum alloy profiles (such as hollow aluminum bars with square cross section), and we can buy them in aluminum alloy profile stores.
if we use aluminum alloy frames.
if we use aluminum alloy frames, we can buy them in aluminum alloy profile storesIf the screen is very small, the unit board can be directly fixed on the frame, and if the strength is enough, the bracket is not needed.
for the specific manufacturing process of the frame.
please refer to the production of the light box.
for details ­ ­ 5.3. Production process of stainless steel frame ­ We can see that many LED screen frames are made of stainless steel.
in fact, the stainless steel frame is only wrapped with a thin layer of stainless steel skin on the basis of a simple frame.
it looks beautiful.
it is generous and adds added value.
as for the process of wrapping the frame, we need to use a folding machine.
we can go to the hardware factory where kitchenware is made, It's better to go to a professional LED frame professional production shop.
the biggest difference is that the seam of the binding is very small.
there is a big difference between the two shops ­ 5.4. Aluminum alloy frame ­ We can go to the material store of aluminum alloy profiles to buy materials that meet the screen thickness.
and then cut and assemble them ­ 6. Troubleshooting ­ 6.1. No display ­ Check the power connection, confirm whether the power light and the light on the control card are on, and measure whether the voltage of the power control card and the unit board is normal.
if the power supply is normal.
please check the connection between the control card and the unit board.
use the method of replacing accessories.
eliminate errors.
check the connection between the control card and the unit board ­ 6.2. Display confusion ­ Case 1.
the two boards display the same content.
-- please use the software.
to reset the screen size.
in case 2, the two boards display the same content ­ Situation 2.
very dark.
-- please use the software.
to set the OE level.
­ Case 3.
interlaced light.
data line contact is not good.
data line contact is poorPlease re connect ­ Case 4.
some Chinese characters are displayed abnormally.
-- they belong to normal.
Chinese characters and symbols that are not in the national standard font database.
the display of Chinese characters is abnormal ­ Case 5.
some areas of the screen are not displayed.
replace the unit board.
replace the unit board ­ 6.3. Unable to update screen data ­ 1.
use the broadcast address to send.
see if the screen number is wrong.
2 ­ 2.
check whether the serial port number is correct and whether the serial port is occupied.
2 ­ 3.
check whether the connection is correct and disconnected.
check the connection ­ 7. Tools and accessories ­ Essential tools: ­ Digital multimeter.
40W soldering iron, solder wire (the most expensive, don't be greedy for cheap), rosin, screwdrivers, wire cutters, scissors, ­ List of common accessories: ­ Control card, unit board, power supply, power cord, power plug, 5V power cord, cable, cable head, network cable, serial port head ­.
first, what is led display? LED screen: LED is the abbreviation of light emitting diode.
it is a display mode by controlling the semiconductor light emitting diode.
its general appearance is composed of many small red lights, and the characters are displayed by the light on and off.
it is used to display text, graphics, images, animation, market, video, etc Video signal and other information display screen.
LED display screen is divided into graphic display screen and video display screen.
both are composed of LED matrix blocks.
Graphic display screen can display Chinese characters, English text and graphics synchronously with computer; The video display screen is controlled by microcomputerIt can broadcast all kinds of information in a real-time, synchronous and clear way, and also display two-dimensional and three-dimensional animation, video, TV, VCD programs and live scenes.
the LED display screen has bright colors.
it has a strong sense of three-dimensional, static as oil painting and dynamic as film. It is widely used in finance, taxation, industry and commerce, posts and telecommunications, sports, advertising, factories and mining enterprises Transportation, education system, stations, docks, airports, shopping malls, hospitals, hotels, banks, securities markets, construction markets, auction houses, industrial enterprise management and other public places.
LED display can display changing numbers, words, graphics and images; It can be used not only in indoor environment, but also in outdoor environment.
it has the incomparable advantages of projector, TV wall and LCD screen.
LED has been widely valued and developed rapidly.
it is inseparable from its own advantages.
these advantages include: high brightness, low working voltage, low power consumption, miniaturization, long life, low cost, low cost and so on Impact resistance and stable performance.
the development prospect of LED is extremely broad.
at present, LED is developing towards higher brightness, higher weather resistance, higher luminous density, higher luminous uniformity, reliability and panchromatic direction.
[edit this paragraph] second: the development history of LED display screen in 30 years. Review the earliest gap, GaAsP homojunction red, yellow, red, red, yellow, red, red, yellow, red, red, yellow, red, red, yellow, red, red, yellow, red, yellow, red, yellow, red, yellow, red, yellow, red, yellow, red, yellow, red, yellow, yellow, red Green LED with low luminous efficiency has been used in indicator light, digital and text display.
since then, LED has entered a variety of application fields.
including aerospace, aircraft, automobile, industrial applications, communications, consumer products, etc., all over the national economy and thousands of households.
by 1996, the sales volume of LED in the world has reached billions of dollars.
LED has been widely used in many fieldsAlthough LED has been limited by color and luminous efficiency for many years.
due to the advantages of long life, high reliability, low working current, compatibility with TTL and CMOS digital circuits, gap and gaaspled have been favored by users all the time.
in recent ten years.
High brightness, high reliability, low power consumption and low power consumption are the main advantages of gap and gaaspled Panchromatization has always been a leading topic in the research of LED materials and device technology.
ultra high brightness (uhB) refers to the LED whose luminous intensity reaches or exceeds 100mcd.
also known as candela (CD) led.
the development of high brightness a1gainp and inganled is very rapid.
it has reached the standard material GaA1As, GaAsP, inganled In 1991, Japanese Toshiba company and American HP company developed ingaa1p620nm orange ultra-high brightness LED.
in 1992, ingaa1p590nm yellow ultra-high brightness LED was applied.
in the same year, Toshiba company developed ingaa1p573nm yellow green ultra-high brightness LED, The normal light intensity is up to 2CD.
in 1994, Japan Nippon Yat Sen company developed ingan450nm blue (green) ultra-high brightness LED.
so far.
the three primary colors of red, green, blue, orange and yellow LED for color display have reached candela level luminous intensity, realizing ultra-high brightness and full color, The development of LED in China started in the 1970s.
the industry appeared in the 1980s.
there are more than 100 enterprises in China.
95% of the manufacturers are engaged in the back packaging production, and almost all the required chips are imported from abroadThrough several "five-year plans" of technological transformation, technological breakthrough, the introduction of foreign advanced equipment and some key technologies,
the production technology of LED in China has taken a step forward.
Second, the performance of ultra-high brightness LED: compared with GAAP gapled, ultra-high brightness red a1gaaled has higher luminous efficiency, and the lumen efficiency of transparent low contrast (TS) a1gaaled (640nm) is close to 10lm / W, The color of ingaalpled is the same as that of GAAP gapled, including green yellow (560nm), light green yellow (570nm), yellow (585nm), light yellow (590nm), orange (605nm), light red (625nm), dark red (640nm).
the luminous efficiency of transparent substrate a1gainpled is compared with other LED structures and incandescent light sources.
the lumen efficiency of ingaalpled absorption substrate (as) is 101m / W, The transparent substrate (TS) is 201 M / W, and its lumen efficiency is 10-20 times higher than that of GAAP gapled in the wavelength range of 590-626 nm; In the wavelength range of 560-570, it is 2-4 times higher than GAAP gapled.
the ultrahigh brightness inganled provides blue and green light.
the wavelength range of inganled is 450-480nm for blue, 500nm for blue and 520nm for green; Its lumen efficiency is 3-151m / W.
at present, the lumen efficiency of ultra-high brightness LED is higher than that of incandescent lamp with filter.
it can replace incandescent lamp with power less than 1W, and LED array can replace incandescent lamp with power less than 150W.
it can replace incandescent lamp with power less than 1WFor many applications.
incandescent lamps use filters to get red, orange, green and blue, while ultrahigh brightness LEDs can get the same color.
in recent years, ultrahigh brightness LEDs made of AlGaInP and InGaN materials combine multiple (red, blue and green) ultrahigh brightness LED chips together.
all kinds of colors can be obtained without filters.
including red, orange, yellow, green, red, green, etc Blue.
at present, its luminous efficiency has exceeded that of incandescent lamp, and the forward fluorescent lamp is close to.
the luminous brightness has been higher than 1000mcd.
it can meet the needs of outdoor all-weather and full-color display, and the large LED color screen can show the sky and ocean, and realize 3D animation.
the new generation of red, green and blue ultra-high brightness LED has achieved unprecedented performance.
III The application of ultra-high brightness LED: 1. Information indicator car signal indicator: the car indicator lights are mainly direction lights, tail lights and brake lights outside the car; The interior of the car is mainly used for lighting and display of various instruments.
ultra high brightness LED has many advantages compared with traditional incandescent lamps.
it has a wide market in the automotive industry.
LED can withstand strong mechanical shock and vibration.
the average working life MTBF is several orders of magnitude higher than that of incandescent lamps.
it is far higher than the working life of the car itself, Therefore, the LED brake lamp can be packaged as a whole without considering the maintenance.
compared
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