介绍
With the increase in environmental awareness, energy saving has become the key to the development of LED显示屏 technology.
Common cathode LED displays have attracted attention for their energy-saving characteristics. This article will briefly explore how common cathode technology can achieve energy savings and its impact on environmental and economic benefits.
1. Introduction to common cathode LED display technology
Imagine that the common cathode LED display is like a huge “family party” in which all LED lights (i.e., small bulbs) have a common “mother” – cathode (negative pole), and each LED light has a unique “father” – anode (positive pole).
This “mother” cathode is shared by all LED lights and connected to the ground (i.e., the negative pole of the power supply) through a unified connection point.
When we want to light up a certain LED light in this “family party,” we will send it an “invitation” – current through its “father” – anode. This “invitation” will make the LED light light up and show light.
Because all LED lights share the same “mother” – cathode, we only need to control the “father” – anode of each LED light to decide which lights are on and which lights are off.
1). The core difference between common cathode and common anode LED displays
1.1). Current path and voltage regulation:
- Common cathode:
The current flows from the anode of each LED lamp, passes through the LED lamp, flows to the shared cathode, and finally flows into the ground.
This method allows us to provide different voltages for each LED lamp, just like allocating different “snacks” to each “child,” ensuring that they can all get the “nutrition” that suits them best.
- Common anode:
The current flows from the shared anode, passes through each LED lamp, flows to their respective cathodes, and finally flows into the ground. In this way, all LED lamps share the same “snack bag,” which sometimes causes some “children” to be overfed (too high voltage) and others to be underfed (insufficient voltage).
1.2). Energy consumption and heat dissipation comparison:
- Common cathode:
Because the voltage of each LED lamp can be precisely controlled, the common cathode display screen has lower energy consumption, just like the “mother” will carefully allocate “snacks” to avoid waste.
At the same time, low energy consumption also means less heat is generated, and the display screen performs better at dissipation.
- Common anode:
Since the voltage cannot be precisely controlled, the energy consumption of common anode display screens may be higher, just like “mom” can only put the “snack bag” in the middle and let the “children” grab it by themselves, resulting in some “children” eating more, some eating less, and generating a lot of “quarrels” (i.e., energy consumption and heat).
2. Why common cathode LED display can save energy
1). Accurate 电源, voltage distribution on demand
The primary reason why common cathode LED display screens are energy-saving is that they can provide them with just the right voltage according to the different characteristics of the three primary color LED chips of red, green and blue (R, G, B).
Just like allocating their favorite food to children with different tastes, common cathode technology ensures that each LED can get the voltage that suits it best, without waste or lack.
If all LEDs are driven with the same voltage, some LEDs may waste energy due to excessive voltage, and some may not emit enough light due to insufficient voltage.
However, common cathode technology tailors the voltage for each LED through intelligent regulation, which not only ensures the luminous effect but also saves energy.
2). Reduced loss, energy-saving and efficient
Common cathode technology also saves energy by reducing the voltage drop and internal resistance in the circuit. Voltage drop and internal resistance are like “thieves” in the circuit, who will quietly steal some of the electrical energy.
However, common cathode technology reduces the theft of these “thieves” by optimizing the circuit design to make the current flow through the LED smoother.
Specifically, common cathode technology makes the power supply voltage more compatible with the LED operating voltage, reducing the loss in the voltage conversion process.
At the same time, since the cathodes of all LEDs share a common circuit, the number of connecting wires is reduced, further reducing the power loss caused by resistance. In this way, more electrical energy is used to emit light instead of being wasted in the circuit.
3). Low-temperature operation and extended life
Another benefit of common cathode technology is that it can reduce the heat generated by the LED display during operation. Heat generation is a common problem of LED displays. Excessive temperature will shorten the life of the LED and affect the display effect.
However, common cathode technology greatly reduces the heat generated by the display during operation by accurately supplying power and reducing losses.
It’s like putting a “cooling coat” on the display to keep it at a low temperature when it is working. In this way, the life of the LED is extended, and the display effect is more stable.
At the same time, low-temperature operation also reduces the risk of structural damage caused by thermal expansion and contraction, making the display more durable.
In summary, the common cathode LED display achieves significant energy-saving effects through precise power supply, reduced loss and low-temperature operation.
These characteristics not only improve the energy utilization efficiency of the display, but also extend the service life of the display, making the LED display technology more environmentally friendly and efficient.
3. How is the energy-saving effect of the common cathode LED display
If all the electrical appliances your home can use electricity on demand without wasting a single cent, how much energy would be saved? The common cathode LED display is such an “energy-saving expert.”
Compared with the common anode technology, the common cathode technology is like a precise “power distributor”. It can provide the right voltage for each LED lamp bead to ensure that they can emit the brightest light with the least amount of electricity. In this way, the energy waste caused by excessively high or low voltage is avoided.
According to our calculations, at the same brightness, the common cathode LED display can save about 17.6% to 22% of electricity. This is like saving a portion of your electricity bill every month. Over time, it will add up to a considerable amount!
4. Other advantages of common cathode LED display
In addition to the significant energy-saving effect, a common cathode LED display has many other advantages, making it an important choice in the LED display market. The following are other major advantages of common cathode LED display:
1). Color authenticity
Common cathode technology ensures the authenticity of displayed colors by reducing heat generation.
In traditional LED display screens, due to the high heat generation, the LED lamp beads may drift in wavelength after long-term operation, resulting in distorted display colors.
However, the common cathode LED display reduces heat generation by optimizing the power supply method so that the LED lamp beads have no wavelength drift under continuous long-term operation, thereby ensuring the authenticity and stability of displayed colors.
This advantage is particularly important for application scenarios that require high color reproduction, such as advertising, video playback, stage performances, etc.
In these occasions, the authenticity and stability of colors are directly related to the audience’s visual experience and the accurate communication of information.
2). Extended life
The reduction in energy consumption also brings another significant advantage, which is to extend the life of the display screen.
Since the common cathode technology reduces the temperature rise of the system and reduces the probability of LED lamp beads being damaged by high temperature, the stability and reliability of the entire display system are improved.
Due to the high heat generation of traditional LED display screens, LED lamp beads are easily aged and damaged due to high temperatures, resulting in a shortened display screen life.
The common cathode LED display screen extends the service life of LED lamp beads by reducing energy consumption and heat generation, thereby improving the durability of the entire display system.
In addition, common cathode LED display screens are usually equipped with intelligent heat dissipation systems and over-temperature protection mechanisms, which further ensure the stable operation and long life of the display screen in high-temperature environments.
5. What is the market trend of common cathode LED display screens?
1). Energy saving is very popular
Nowadays, everyone is more and more concerned about environmental protection and energy saving. Common cathode LED display screens are particularly popular because they can save a lot of electricity.
This type of display screen improves the circuit to make the voltage control more precise, thereby greatly reducing energy consumption. In this way, not only can users save electricity bills, but they can also contribute to protecting the environment.
Therefore, common cathode LED display screens can be seen on many occasions, such as billboards, stadiums, traffic signs, and stage performances.
2). 挑战
Although the common cathode LED display is very popular, some difficulties have still been encountered in its promotion. One of the main problems is that the industrial chain for producing this kind of display is not mature enough, resulting in relatively high costs.
Because the production of this kind of display requires close cooperation of multiple links, these links have not yet formed economies of scale, so the cost cannot be reduced.
In addition, there is a problem of patents. Some key patented technologies are mastered by a few companies, which may restrict other companies in research and development and production, increasing the difficulty and cost of innovation.
3). Promising prospects
However, don’t worry, these problems will be solved slowly. With the continuous advancement of technology, the industrial chain for making common cathode LED displays will become more and more perfect, and the cost will gradually decrease.
At the same time, the government and enterprises are also working hard to solve patent issues so that more people can use this energy-saving display.
结论
The energy-saving potential of common cathode LED displays has brought new opportunities to the LED display industry.
It is expected that this technology will further promote the improvement of environmental protection and economic benefits in the future and contribute to the realization of sustainable development.
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