Submit Don't show this popup again. This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Rated 0 out of 5. Add to wishlist Choose a wishlist or Create a new list My wishlist Create a new list. Add to wishlist. Description Additional information Reviews 0 Inquiries Description. LED is a temperature-sensitive components, with the rise of temperature, light decay becomes larger, color deviation, thermal expansion and contraction become more serious, affecting the airtightness of led, common cathode technology to reduce the temperature of the screen body, a good solution to the above problems, while electronic components in a relatively low temperature with higher reliability, longer life.
In terms of temperature reduction, common cathode technology is undoubtedly the trend in the mid- to high-end market. In the solid-state products, because they are in use for a long time, energy saving can let customers save costs, and in the long run is more cost-effective.
Although common sun is more suitable for the moment, but common cathode in reducing the red led supply voltage is better than common sun. So, what is the core supply technology? From the feedback and communication, we found that the most mentioned are these key words: PLL phase-locked loop , PWM pulse width modulation engine , dynamic energy saving, high gray scale 16bit. However, for the question of whether the array is necessary, each family has its own view.
Yichen Zhao, Chairman of Rising Sun:. Agree that common cathode technology is currently better practice is to use Array array architecture, but is not the only architecture, the specific or according to the technical requirements of display products and market positioning decision. Sun and moon into not only provide array type, but also provide discrete.
Common cathode driver IC on-chip PWM is necessary, this is because common cathode in addition to energy saving, reduce the temperature of led beads is the core demand! If you do not use PWM technology, you will have to meet the brightness requirements by increasing the drive current of the led beads, thus making the working power consumption of the led beads increase significantly, offsetting the benefits brought by the common cathode. Multiple display factory technical director:.
Common cathode has in the layout, but not yet vigorously promoted. The main reason for the slow advancement of common cathode technology is the high cost of production, based on the original supply chain collaboration, common cathode requires customization of the chip, packaging, PCB and other ends of the industry chain, the cost is higher.
But once the volume is up, the production is standardized rather than customized, especially if there are terminal manufacturers to support the vigorous upward push, common cathode technology is the opportunity to promote faster. Outdoor S10 energy-saving common cathode screen series and conventional ordinary screen comparison, the advantages have: 1. According to the current national policy and the development needs of led display, energy-saving products are the general trend, and the layout of enterprises is also no excuse for common cathode energy saving.
However, enterprises should also objectively look at the difficulty of entering the industry, whether the industry is mature, whether the production cost can afford, whether the return cycle can afford, according to their own situation to weigh, objective analysis, choose the most suitable for their own development path.
LED display industry from time to time to launch new technologies new products, which is conducive to pulling new demand. Common cathode this new technology has a better energy-saving effect, this technology responds to the national policy of emission reduction, but also to meet the end-user demand for energy saving, is expected to turn the new water in the stable development of the led display industry, so when the technology is open, a crowd of led display companies tend to rush, have entered the game, research and development of related products, the common cathode energy saving pushed to the forefront of the wind.
Under such a great heat, the common cathode energy saving into the industry seems to be inevitable, but in fact there are many obstacles, so that led display manufacturers must face up to. Common Yin energy saving want to really enter the industry, but also from the solution of these difficulties.
Difficult to escape from the shadow of the patent has not receded. Whether from the level of energy saving and emission reduction, or from the perspective of pulling the led display industry new demand, common cathode is a favorable technology.
But the patent of this technology is abroad, China has and only one enterprise has been authorized, and a long time does not open to the public, until nearly a year to open to the public. Although the technology has been open, but also limited to domestic, once the product is sold overseas, there is a high probability of copyright patent litigation issues.
Most led display companies are export-oriented enterprises, products are sold around the world, companies want to lay out the common Yin energy-saving, then the common Yin energy-saving overseas market needs to be temporarily abandoned.
On the domestic side, many enterprises to seek new development opportunities, have laid out the common cathode energy saving, the market competition is relatively fierce, so the enterprise to speed and quality of both products, to seize the market. Although the patent is very important at home and abroad but led display manufacturers also need to know how to protect their rights.
Actively look for the common cathode technology has been publicly available information and related technology, looking for favorable conditions for the use of common cathode technology to improve the degree of use of common cathode technology. Of course, there is more than one way to save energy, the need for the hard work of the led display manufacturers, efforts to research and development, looking forward to the next energy-saving technology, mastered in the hands of the country.
Common cathode energy-saving support is not perfect, the main battlefield of common cathode energy saving lies in small pitch. After years of development and improvement, the energy-saving effect of the common sun technology can also achieve quite good results, and the current market is still mainly to feed the technology.
In the face of such a situation, it is necessary to develop the layout of the whole industry and promote together to accelerate the rapid maturation of the common yin energy-saving products.
In addition, from the perspective of the common cathode energy-saving products released by the enterprises, common cathode energy-saving products with COB packaging technology, mostly used in the field of small point pitch display. From the technical level, the common cathode energy-saving small current precision and consistency, low gray and high brush processing and other key technologies are more applicable to small-pitch led display. Numbers from 0 to 9 can be displayed using various combinations of the segments and in addition to this the hexadecimal letters A to F can be also displayed using a seven segment display.
The slight inclination to the right is given to improve the readability. Some seven segment displays have an additional dot element which can be used for indicating decimal points. Here in this article we give stress to the LED seven segment display. When power is given to a particular segment, it glows and the desired digit can be displayed by powering the suitable combination of LEDs. LED seven segment displays are of two types, common cathode and common anode.
In a common cathode display, the cathode of all LED segments are tied together as one common cathode pin and the anode terminals are left alone as input pins. In this scheme the common cathode is always connected to ground and the control signals active high are applied to the inputs anode terminals. In common anode type display, the anodes of LED segments are tied together as one common anode and the cathode terminals are left alone as input. In this configuration the common anode is always connected to a suitable positive voltage and the control signals active low are applied to the inputs cathode terminals.
Pin out and image of a seven segment display is shown in the figure below. It has an adjustable current capability which can be set using only one external resistor. In addition to that, it has a four-wire serial interface that can be easily connected to all microprocessors.
It can drive 64 individual LEDs connected at its output pins using only 4 wires by using Arduino. Furthermore, it can drive dot matrix displays , 7-Segments displays and bar graphs. It is one of the most popular display driver IC. It is the serial data input pin. This IC has an internal bit shift register. On every low to high transition of clock signal, the data is loaded into this register. These are common output pins for all the segments of digits 0 to 7. These pins sink current from the display common cathode.
It is the chip select pin. For normal operation, it is connected to low logic level to clock data in or out.
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