LED pixel— WS2812/WS2811 flexible strip

WS2812/WS2811 flexible strip
WS2812/WS2811 flexible strip lights, also known as LED full color strip LED digital bar, led pixel light bar, a ajority of user call the led product LED pixel strips, the LED product is flexible FPC(flexible light strips) as substrate solder LED, and a peripheral circuit is formed, can achieve chasing, running water, Symphony, display, mainly for KTV
hotel, home decoration WS2811(external IC)Symphony of lledights
WS2811 Symphony of lights using an IC three lights, commonly known as “a drag three”，IC as WS2811,lamp beads is 5050(full-color led ights beads) Operating voltage of 12V DC. 12V with DC power supply. Full-color controller can achieve a gradual /jump change, single /multi-Happy valley, running water /chase change, meteor /flash! Color change / mix becomes so a variety of effects and model! Lights with intelligent IC core,through the full color controller or with programming, to achieve any desired effect.

Full – color LED  (LED knowledge)
Definition of Full – color LED:
Led flexible strip called full – color LED lamp, LED lamp, led dream
digital lamps and other name, this product adopts constant current IC,(single point of control), with 5050RGB smd beads attached to the FPCB ,folding flexible waterproof grade reaches IP68, the length of
each volume as 5 meters, light bar with 3M adhesive tape or fastening
screws, adopts low voltage DC power supply safety and convenience a variety of colors ,colorful！

Features of Full – color LED:

1 the standard size as 5 meterss, can be cut freely;
2 light-emitting pure color, soft, colorful, full color, colorful,there are white, warm white, cool white and other special color.
3 waterproof grade is IP68, low voltage(5V—24V) DC power supply safety.
4 the single point single control,256 level gray scale, space of LED pixel Is small, small power consumption low heat, wide viewing angle characteristics?
5 can display video animation, images, text and other character, effect of diversified and editorial free .
6 lamp adopts constant current IC drive control, high stability.
7 FPCB(flexible printed circuit) board use same as rolled copper material, more folding, arbitrary bending;

LED pixel module’IC

In addition know that Full-color led pixel module on the formal part（aspects）,Alsho need to identify ic and auxiliary components.IC and led bulb quality as important, good driving and good compatibility, so as to play a role in led pixel module. Of course, a circuit board that only has a IC, lamp and resistor full-clor module in stability as weakness than a capacitor. Two level and three level pip full-color module. The former is easily affected by the voltage, due to the effect of signal transmission difficulties. Especially in the use a large number and all ed is lighting. One trouble after maintenance.

IC LPD6803, D705,6912
LPD8806,LPD8809
TM1803,TM1804,TM1809,TM1812
DMX512,WS2801,WS2802,WS2811,DS189
TLS3001,TLS3002,TLS3008
P9813,SM16715,BS0901,BS0902,BS0815
The most widely used should be: LPD6803,1903，D705 5903,3001 several D705 and 5903 is cheap,5903 is an upgraded version of D705,but the stability have noting on LPD6803.
LPD6803 gray as 32,1903 gray is 256, the stability is good the price is more than 5903 and D705. 3001 gray level higher. Good stability, higher price point. But the user rarely use 3001.

Other way to drive the led pixel module
LED pixel module is display with excellent performance. LED pixel strip（such as ws2811 led pixel） has the advantages of long service life, saving, high brightness, various colors, fast response and low drive voltage.
in generally WS2801IC was in control of the led pixel model.
The gnergy saving can also luminous intensity by adjusting LED PWM wave according to the RGB tricolor light mixing principle of regulating a variety of colors, and then control to achieve a variety of display results by MCU intelligent. Now a lot of applic ations in the field of city lighting, architectural landscape lighting ,stage lighting design.

Talk about the LED Pixel Light

Definition of LED pixel: LED pixel light is use for large building facade animated graphic display and dynamic lighting display advertising signs. Pixel density in any combination, especially suitable for complex shapes such as circular .arc surface, cylinder, signs, display video and trademark words such as visual graphic display effects.
Features of led pixel’ component: Constant current drive and DMX51(such as WS2801IC) composed the led pixel module. DMX51 can be change of control procedures, support to work offline. Constant current driver, built-in PWM luminance level control, DMX51 can be change of control procedures, support to work offline. Constant current driver, built-in PWM luminance level control, level Applications: large buildings facades animated graphic display and advertising signs dynamic lighting show.Light color: RGB Y W monochrome full color
Other Features:
1, ultra-thin LED pixel strip lights, aluminum structure with high tensile strength.
2, polymer waterproof silicone potting material overall static, protection grade is IP65.
3, high brightness LED light source: specific angle light source, blending evenly soft and full, a curved mixing light design visual Angle of more than 120 °.
4, connected and installation can be customized according to the size of the building walls, thin shape easy to hide.of RGB luminance level of up to 65536.

how to choose led pixel mode
*The size of chip:

The same chip size is large, the brightness is higher , more strong
bearing capacity, stable performance is better, of course the price
performance is better, of course the price
higher relatively，the chip size list as follows:9MIL, 10MIL, 12MIL,
14MIL and 23MIL,etc..
*The efficiency of light eitting, per watt issued LM value is called luminous efficiency. This is an important standard to distinguish whether the led  energy saving.

*The quality of circuit board. The quality circuit board will have an
important impact on the life of the led. The circuit board is divided into aluminum, glass plate, semi glass filber board, paper board Meanwhile Aluminum plate of the best quality. It has best cooling effect,But the cost is too high the led manufacturers only used in high power LED products generally ,Module exposed lamp manufacturers use cardboard Half glass and glass plate. Colorful and full color series have at least use half a glass fiber.

IC(ic control):
*In comparison, IC has a few kinds(such as  ws2801ic), variety of ic are completely different. To take in performance, stability and price are different, resulting in product cost is different.
*Solder: whether the solder soft reflected brightness and ther is no Weldl. This affects the heat and the sign stability.

* Wire:silicagel,containing copper wire.line of ROEN, this is the best line.silica Gel sleeve can withstand oxygenation in a long time,wire body that would be better and soft still, is convenient for the user to install in narrow space, copper can through more current ,not estroyed by large currents. If the wire with UL certification must be reliable quality.

* Shee: the quality of shell can prevent UV, flame retardant .

Piranha LED

In general the Piranha LED can be used to make the brake lights, turn lights, down lights of car. because the heat Piranha LED’s have an advantage, so can withstand 70~80ms of current. So the Piranha led has a wide lighting application of selection for led ser. To follow we’ve realized that estimates of Piranha LED power supply:

1. Static led pixel (The same spacing and non-spacing , etc.);

16 * 8 real pixel single module maximum power consumption as :

16 * 8 * 3 * 0.02 =7.68
16 – 16 pixel point width;

8 –  8  pixels points higher;

3 – each pixel is composed of three circuit current;

0.02 – each way to estimate the size of the current.

NOTE: 2R1G1B real pixel adopts two pieces red LED in series connects as a channel output (current)

2.static virtual pixels (equidistance) 2R1G1B single module
maximum power 16 * 8 *4 * 0.02 =10.24
16 – 16 pixel point width;

8  –  8  pixels points higher;

4  – each pixel is composed of 4 circuit current;

0.02 –estimate the size of the circuit current.
NOTE: 2R1G1B virtual pixel has 4 red LED lamps as two channels. Counted separately for each one current channels.

3 scanning the real image (1R1G1B) or (2R1G1B): P10 full color four to sweep 16 * 16

Module as an example to show a single module maximum power consumption
16 * 8 *4 * 0.02 =10.24
16 – 16 pixel point width;
3 – each pixel by three-way current;

8  –  8  pixels higher points;

4  – 1/4 scan;

0.02 –estimate the size of the circuit current.
NOTE: 2R1G1B real pixel adopts four pieces red LED in parallel connects as a channel output (current);each power estimation using scanning plate was 80%

Application The address stage(led pixel) and DMX512 LED protocol
The DMX512 protocol is a lighting equipment online data transmission

Standards issued in 1990 by America Association (USITT)
it’s is a high performance protocol, the dmx controller with DMX512 LED protocol.They wanted to include all aspects and characteristics, data protocol, data format content The electrical characteristics of DMX512 are Fully compatible with the RS-485 , including the selection of driver/receiver, electrical circuit ‘ load and multi station configuration…looked at all Aspects of the requirements are consistent.DMX512 data protocol specified using the band rate of 250Kbs (Send a bit data are required to use 4ms),Before the normal data transmission sent a Reset signal and to declare the data transmission is start. First frames data known as the initial code Which contains the head code end code and equipment type code (to show clearly receive the Equipment specified in subsequent).

Finally according to the equipment number sequence sent to data package, each device is a follow:
1# frame data,
2#frame dat, until finally data package of equipment is send out.
The equipment number up to 512(There are reasons call DMX512),the data interval of frame
is high, the length of not more than 1 second. The provisions of the DMX512 data format, the
frame data length is 11 bits. According to the transfer order Description as following:
String 1 bit      - start bit low level(SPACE);

String 8~9 bit    - bits of data,from the lowest to the highest order(LSB to MSB),high level;

String 10~11 bit  – stop bits,high level(MARK);

String 8 parity bit – do not send  Generally speaking with RS-232 interface chip can be achieved.The combination of multiple DMX512 modules together to form a decorative lighting system.Which can control the system. According to the need of a different color, brightness, combination.to display intervals. Thus realize the colorful and vivid effect.

Essentials of LED lighting engineering basics

There are many parts of the country to join the ranks of LED lighting projects,  but short of the industry related information and experience (knowledge of commercial led lighting), so resulting in business can not be carried out. In order, I introduce to you the relevant knowledge,  how to carry out the relevant business.
First, the corresponding LED products must be understood; ;many kinds of LED products in here, lighting engineeringwho often perform following products

 Led pixel is one, but today we have to understand than the digital tube lights first

1, digital control, also known as LED tube, LED guardrail lights, LED lights outline; This product is commonly used to install floor, body contours, KTV door head or advertising signs, and road and bridge parapet lighting project; you can reach the colorful water, chase, scan results; if made of LED screens (LED digital signs) can be a variety of dazzling animation and flowers, you can also play video; the text and graphics. LED LED digital tube big to category: Press effect can be divided into:
Monochromatic light of red, yellow, blue, green, white; colorful divided into: single-stage colorful gradual transition; true sixth, eight true, section 16, section 16, section 32, section 48 and so on; press control The method is divided into:
Internal control and external control; internal controlRefers to about writing software to achieve business outcomes. LED guardrail tube brings out respectable led effect after the power supply is connected directly out; external control in short we need external controller;
the controller is divided into offline system and on-line system; on-line system refers to the control system attached to a computer and work .used for LEDdigital tube screen（such as ,with 24 channel dmx controller）; offline system is not depend on the computer, electric connection can input control signal to drive a LED fence tube.

The features of led pixel

I. Introduction:

Products using three 5050 highlighted  led pixel and PC material, with a cold, anti-aging, non-friable, waterproof performance, light, long life, easy installation. Can be achieved: the preparation of various dynamic effects can be arbitrarily changed by external control control, there are multiple simultaneous changes. Low-power, long life, red, yellow, blue, green, white, light color colorful effect. Can be synchronized seven-color gradient, jump, chase, full color changing effects scanning, water, etc., and multiple point light source composed of dot-matrix screen, change a variety of patterns, text and animation. Is ideal for decorations amusement park, large billboards, walls ,, Night bars and other places of the stage.

Application areas: hotel, KTV, bars, leisure clubs to achieve a dynamic effect change places.

Second, the product features:

☆ using punching plus 27mm nut tightened

☆ buttons using screw nut fixed

☆ using well-known professional outdoor waterproof plastic irrigation plastic handle, good waterproof effect, with a crack, solve some of the colder regions worries

☆ Application flexible installation options.

☆ can also be installed with a profile, beautiful, generous, does not affect the appearance of the building