Dicolor P4 rental LED Screen leads the rental market for energy saving, convenient and high definition

http://www.dicolor.cn/

 

LED display domestic market experienced booming market in 2007-2008 and recession in 2011 in China. One of the direct causes was excessive investment but technology couldn't meet market requirements. So the market volume decreased and many led factories applied for bankruptcy.
In LED China 2012 in Guangzhou, many companies showed characteristic led rental display. These new hot products had a common point in appearance, achieving the desire of short, small, light and thin. As the appearance of new rental led screen serials, it caught the eyes of mass media, advertising, real estate and rental customers and was told these were what they needed.
Dicolor is a global led display solution provider which specialized in R&D, producing and distribution of led display. Dicolor newly designed blue fairy serial rental led screen was firstly presented into the market on August, 2011, including P5.33, P6.4, P8, P10.66, P12.8, P16. It can meet various kinds of needs, like indoor media, outdoor advertisements, stadium, 3D stage, etc.
Dicolor led rental display experienced continuous updating. Traditional sheet metal cabinet was gradually replaced by super thin and light die-casting aluminum cabinet. The weight is lighter and lighter; structure is more reasonable, more precision and achieves precise combination without intervals. The technology and structure breakthrough brings a reformation in high-end led display market and led rental screen market. Simpler transportation and dismantle with nearly perfect showing image creates more possibilities for the varieties of display projects.
After LED China 2012, Dicolor R&D and engineering department made a research on the feedbacks of customers purchased rental products before and did research experiments again and again to meet customers' requirements. Finally, they designed this fairy P4 rental led screen with energy-saving, high-definition and convenient. It adopts 1/8 virtual scan technology. Brightness is 1500cd/sqm which makes it energy-saving, 62500dots/sqm pixel density makes it high-definition and cabinet 12.5KG, 3.3cm edge thickness makes it convenient. Thus it was thought the leader in led rental market in the next five years by many experts in led display field.

Advantages of Dicolor new designed P4 rental led screen

General cabinet	Die-casting aluminum cabinet
Heavy. Transportation cost is high and it is hard to install for its heavy weight.	Light and thin, only 48kg/sqm . Cabinet weight is only 12.5KG/piece. Low transportation cost.
Much room are taken for packing.	Use flight case for packing which can load 6PCS cabinet, increasing the packing efficiency greatly.
Low installing efficiency.	Easy assembling structure , one person can install one cabinet within 10 seconds.
Lots of tools are needed for installation.	100 % assembled by hands , no tools needed.
Boundary effect is hard to control to cause flatness problem.	Shaped by dying, tight connectors, flatness is within 0.2mm.
It is hard to maintain for emergency.	Easy to maintain. Each cabinet of the screen can be dismantled and assembled (replaced )

Light: Cabinet size 512mm*512mm, only12.5kg comparing to more than 25 kg of common cabinet. Saving time and labor cost.
Thin: It is die-casting aluminum cabinet, thus it is featured by high strength, toughness, precision and it is hard to be deformed. The edge is just 33mm comparing to the 160mm of common cabinet.
Fast: There is fast locking device in four corners. It takes only 10 seconds to assemble one cabinet by pushing the handle 90 degree. It is fast and precise assembling.
Easy: The cabinet is modular designed, each cabinet of the screen can be easily dismantled and assembled(replaced).
Compatible: New structure design satisfies hoisting and ground-support assembling. P4, P5.33, P6.4, P10.66, P12.8 and P16 are compatible.
Low: Excellent heat dissipation design, no fans and air conditioning are required. Low noise, light weight, low cost for transportation and assembling without tools with low cost for assembling.



Ryan Yi
Sales Director
Phone:+86-18316623191
Skype:Dicolor.ryan
Msn:ryanghana@hotmail.com
Facebook: Http://www.facebook.com/ryanghana
Website: http://www.dicolor.cn/

LED display module design and realization

LED display module design and realization

With the development of socio-economic development and the information age, advertising media company is now widening the field of application of the led screen, called are everywhere. Look at mysterious color display, we doubt it plays software shall have those characteristics and related components.

You can clearly see the LED Flood Light large screen content, require a white backlight. Backlight is present in liquid crystal displays internal optical components, optical-aided by the light source and the necessary components. LED backlight if through such means as increased contrast, zone control, performance is far superior to CCFL back light source. At present, the LED backlighting has been popular in the small and medium size panel, such as mobile phones, digital photo frames and so on, with the development of LED technology and LED chip continues to mature, LED LCD TVs are likely to gradually replace the traditional CCFL LCD TV.

Backlight depending on the location of the light source is divided into lower-back light and side light type backlight. Under direct-type backlight, led strip lights source directly beneath the smooth, light emitted by a spatial distance of the light source and diffusion and mixing of diffusion plate, surface light source emitted, under direct-type backlight requires a certain amount of mixed light distance. Side light type backlight module structure of ultra thin design is more advantage, as the “thin air” up, large size thin-side light LED backlight to become the major TV manufacturers and enterprises in the upper reaches of research.

1 structure design

LED full color side light source is the design of ultra thin structure, the entire structure including: LED Spotlight bars, driven, film material, light guide plate, cooling blocks, frames, back on board. Backlight white LED light, structural design to the entire Active Area of the center point for all parts of the design center, to LCD TV with LCD screen size for the sake of design in other dimensions. Comprehensive consideration of circuit design and optical design of the requirements, to design the structure. Structure design from the u figure OUT layout ⅳ, expressed as a whole body and the relationships among the various components of the Assembly, and then proceeds to part structure design. Framework on the use of segmented design, on the length of segment, avoiding the length is too long. Lights, outlet port settings at the four corners of the back panel, winding length reduction.

2 optical design

Backlight function is by diffuse point source of light making it a surface light source. In order to be eligible for surface light source, first select the appropriate LED, this design is used in the double chip white LED. Through preset white photometric indices, on the LCD screen, optical film, and other related factors analysis of through the back on the calculation of the required luminous flux of the light source. According to the calculations of luminous flux, combined with the LED optical properties of number of the calculates the required LED. As shown in table 1 for selected LED electrical and optical.

In order to increase the brightness of the backlight, match for membrane structures: a diffusion sheet + one BEF+ of a DBEF. Where diffusion is to take the role of diffusion material refraction and reflection of light spray, injection of more uniform: light BEF’s role is to gather, make it vertical into the LCD module to improve luminance: DBEF was originally absorbed by traditional absorption-type polarizer using 50% to increase the brightness of light. Lightguide plate dot diameter 0.54~1.55mm. Figure 1 shows the Lightguide plate part of the network map.

3 circuit design

Light source with dual-chip white LED light, led backlight for distribution in four weeks. In order to achieve a better current uniformity, lamp and hybrid, two and more. In order to achieve better heat dissipation, LED lights with aluminum plate processing. Input voltage of 24V the system as a whole, this voltage is provided by external power supply converter.

3.2 design of drive control circuit

Driver IC is a triple peak current-mode PWM controller, through closed-loop controls the output provides high-precision LED current. The chip contains three peak current mode controllers, provide feedback to IC to ensure high efficiency and high precision. Gate drives are optimized on the chip, used to drive the 0.25A source or O.5A sink current logic level FET, each output current can be linear or PWM dimming for a separate dimmer.
3.3 thermal design

Because the LED luminous efficiency is low, will produce a lot of heat while you work, without addressing the thermal problem, will led to attenuation and shortening of service life of LED light brightness. In order to curb the heat impact of LED backlight luminance and chrominance, thermal design of the LED.

Dear all friends and vistors:

We are a top ranked led display manufacturer with more than 6 years' experience.

We have a industry park with over 30000sqm and 300 employees. Our headoffice are based in shenzhen, China.

Our full color led display are widely used in advertisment, events, concerts, etc.

Our products are sold to over 130 countries and enjoy  a high reputation, because of our outstanding design, favourable price and professional and reliable pre- and after- sales service.

Please feel free to contact me for any further information.

Ryan Yi
Sales Director
Phone:+86-18316623191
Skype:Dicolor.ryan
Msn:ryanghana@hotmail.com
Facebook: Http://www.facebook.com/ryanghana
Website: http://www.dicolor.cn/

The led display technology problems and solving methods

The led display technology problems and solving methods

Now for many consumers buy the led display screen products, in the price is has the certain consideration, but is not only on price, quality will also ensure that pass. Of course as the rapid development of modern science and technology in our country, the led panel display industry maintained high speed growth, industrial scale unceasingly expands, the technology constantly, the growth rate of growth in the market, the led screen display products in technology up and a new step, but there are certain process of technical problems, for example: on April 2, 2012 from Hong Kong hotel sudden herein jun fires events. This is typical in the process on the quality doesn't pass, also to the led display screen industry knocked a warning. So to think that in this high-tech industry development must be in the led sign display security applications technology still save short board, led products are again and standardization of the agenda. Especially in the led panel display fire prevention safety application technology aspects taken seriously.

The led display the stand or fall of fire protection technology mainly and led display screen of raw material, the technology of fire prevention has great relevance. Experts point out that fire prevention raw materials mainly include the use of internal display of wire rod, the power supply, the external protection structure fire materials and plastic package these four aspects:

One, in the most of the led screen display applications, the led sign display unit of area, the greater the show, its power consumption, the greater the stability of power wire has higher requirements.

Two, at the led display external protection structure material, the market level higher screen fire products are mostly using fire prevention aluminum-plastic plate, the watery excellent resistance, fire retardant sex is extremely strong, core material special material oxygen aging performance is very strong also, and outdoor led display products of aluminum-plastic plate with high temperature, rain cold and hot shock aging faster, so that in the humid climate season section, dew or rain can seep into the screen body internal cause electronic components short circuit of fire.

Three, through the UL authentication of the power supply products is also choose the best choice of similar products, the effective conversion can ensure that the power supply load security and stability, in the external environment temperature hot case, also can work normally.

Four, the led display fire prevention raw materials and an important part, that is plastic package. Role is to not only has the flame retardant function, can be in more in high temperature and use for a long time, not deformation, not become brittle cracking, and combining with the sealing good glue use, can effectively prevents the external environment of rain through into internal cause a short circuit fires.

Of course appeal mainly from internal raw materials at four o 'clock for, but the external configuration and design also is very important. Mainly involves the heat to fire, in led display work will deploy platoon fan and air conditioning in the led screen body internal cooling cooling, sometimes air conditioning or platoon fan configuration is not in place will cause the heat processing is not even, easy to cause the due to the temperature ascending and cause screen body internal security hidden danger. While many of the enterprise in the protection grade test, just simple simulated in the external environment spray waterproof test, waterproof, durability and strength to effect on textual research. Led products used after period of time there will be porous to happen. This is also causes the outdoor led display fire or use the important reason for the short life.

In telling the led sign display in technology and can't careless, must carefully serious to find, analysis, finally solve the problem. Technology involved in the aspects is very wide, so want to be many reasons to observe, above, and what we are internal factors, of course, also cannot ignore late in the process of maintaining man-made factors. So to do the led display industry leader, must be in technology on hold, by the high quality, YanGuiGe for themselves to guide the healthy development of industry, to promote the industry in the international competitiveness, toward internationalization

 

Dear all Customers and Vistors:

We are a top ranked led display manufacturer with more than 6 years' experience.

We have a industry park with over 30000sqm and 300 employees. Our headoffice are based in shenzhen, China.

Our full color led display are widely used in advertisment, events, concerts, etc.

Our products are sold to over 130 countries and enjoy  a high reputation, because of our outstanding design, favourable price and professional and reliable pre- and after- sales service.

Please feel free to contact me for any further information.

Ryan Yi
Sales Director
Phone:+86-18316623191
Skype:Dicolor.ryan
Msn:ryanghana@hotmail.com
Facebook: Http://www.facebook.com/ryanghana
Website: http://www.dicolor.cn/

Anlaysis of fire accident caused by LED display

[Common sense]Today, LED display are mainly divided into: full color display series,  EMC display series, rental display series, traffic guidance screen series, energy-saving display series, stadium display series, customized series.

With the rapid development of internet information technology, advertising media are having more attention of the society gradually. Because of LED display’s high brightness, low working voltage, low power consumption, large scale, long lifespan, varieties and other characteristics, are widely used in stadiums, city and public square, traffic, enterprise image promotion, business advertising and other applications.

In the vigorous development of LED display industry today, incidents frequently caused by LED display have caught the wide attention of the society.

Fire accident review:

In September 24th, 2011, a big LED screen collapsed from the stage of Wenzhou Shangri-La Grand Hotel.

In September 24th, 2011, a main LED screen of Guangzhou new library, which faces the Flower city square, suddenly went on fire.

In December 16th, 2011, a LED screen at Cade shopping centre on Xi zhi men Plaza went on fire.

In December 29th, 2011, a LED screen on Yue qing City Traffic Building in Zhejiang Province Went on fire suddenly.

In April 23rd, 2012, a LED screen on top of the Harbour Grand Hotels in Hong Kong went on fire.

Picture area

Fire accident analysis:

As a kind of new environment friendly and energy-saving high-tech green product, LED Display is very popular and has become cities’ indoor and outdoor advertising’s highlights with its superior visual sensory properties. So what are the factors that lead to a fire incident, above all, display manufacturers and owners should bear the corresponding liability.

Product’s bad quality, the effect of external environment and the mistake of manual operation, are the causes of fire. Secondly, when owners purchase products, low price is often placed in the first place, and neglect the quality of products. This makes some manufacturer have to cut the purchasing cost to save the production cost in order to meet the customers’ requirement on low price, thus left a risk of fire happening.

Fire technique analysis:

To analyze from the professional perspective, Dicolor optoelectronics think that the main factors that caused the fire are the following:

1. Improper use of power supply switch. Manufacturers don’t use the right power supply switch that can meet the actual required rated power switching power supply. When the actual load exceeds the rated power of the switch, power supply switch load is too large, thus resulting in power supply switch burnt out and cause fire of the LED screen.

2. Use of unqualified outer protective structure material on the LED screen. The protective structure material’s fire resistance, fire retardant, aging resistance does not meet safety standards.

3. Cabinets wiring. Cabinets wiring does not meet the standard requirement, does not meet the wiring principle, and leave hidden safety problems.

4. Power supply wiring. Distribution of power supply between modules is not balanced in DC power supply system. Distribution of power supply is not balanced in AC power supply system. These are the potential causes of the fire.

5. LED lamp selections. Always focusing on the requirement of the high brightness of the LED screen, leads to the aging of materials, and then reduces the lifespan of screen, thus caused the materials on fire.

Note: When Dicolor Optoelectronics chooses the LED lamp, we keep a balance of 20%, so as to reduce the current of module made under this design. (Current of P16 static module is around 7~8A, average current of video is about 2~3A), products are made with high stability, high efficiency, and energy saving.

6. LED brightness ratio: When some manufacturers choose the LED RGB color selection, they do not follow the principle of 3:6:1. Many manufacturers use small size LED chip in order to reduce the procurement cost of raw materials. This lead to the improvement of LED current for each single module in order to reach the white balance, and this will no doubt increase the temperature of some part of module. When part of module temperature is rising, and there is no good solution to dissipate heat, the module will show result of inconsistent brightness, and will finally cause fire as the aging of materials after long-time use.

7. Kit. Kit materials do not reach the fire retardant standard listed under<UL94V0>.

8. Glue Dispensing. Glue does not meet the standard fire retardant requirement listed under <UL E325549 V0>.

9. Wire. Wire is not selected according to National Standard. Wire wrapping material does not pass standard fire retardant requirement of <IEC 60332>.

Note: The wire core size chosen by Dicolor Optoelectronics is decided by a strict calculation at the beginning of design. To meet the practical needs, meanwhile keep sufficient margin in actual use.

10. Key components. When used for a long time, the temperature of key components can not be maintained at a reasonable level.

Matters needed to be noticed during installation and use:

1. During the installation process, LED screen body and the connecting part between LED screen body and building must be strictly leak-proof and waterproof;

2. The reasonable installation of ventilation equipment for cooling. So as to keep the screen body at a temperature of -10℃ ~ 40 ℃. Use axial flow fan behind the screen body at the top to dissipate heat.

3. The correct installation of lightning protection device. Make sure the LED display screen main body and the building enclosure grounded to earth. Thus to let go the large current caused by lightning.

4. The fault wiring of power supply wire during installation. For example, three-phase electric mix, zero and fire wire mix, strong electric directly connected to the weak electric.

5. Strictly follow the LED display using instruction. Such as first boot the IPC, and then switch on the screen; first close the screen, and then shutdown the IPC.

6. Avoid switching on the LED screen under white balance or screen out of control. Because the system impact current is at the highest point under these condition.

7. Make sure to have professionals to check and maintain the LED display regularly.

Shenzhen Dicolor Optoelectronics Co., Ltd. is a leading large modernized LED Display manufacturer. We focus on R & D, production, and sales of middle-class and high-class LED display. We have passed through the German laboratory EMC certification and EN12966 certification in Europe, as well as other certificate such as ISO9001:2000, CCC, CE, FCC, RoHS certification, etc. We are engaged in LED display manufacturer for more than 10 years, and have lots of design, installation, and maintenance experience.

Shenzhen Dicolor Optoelectronics Co., Ltd. is committed to provide customers with the most suitable quality and services to the market. Engineering staff has undertaken a rigorous professional training, has lots of practical installation experience, maintenance experience, and can provide customers with all aspects of technical guidance, solve customers’ problem during installation and usage. We warmly welcome all customers to call or mail as well as visit our factory. Your advice and suggestions are highly appreciated by Dicolor Optoelectronics.

Ryan Yi

Sales Director

Phone: +86-18316623191

Skype: Dicolor.ryan

Msn:ryanghana@hotmail.com

Facebook: Http://www.facebook.com/ryanghana

Website: WWW.DICOLOR.CN