The key to the popularity of LED and OLED lighting lies in the cost war (Figure)
At present, in line with the advocacy of the green energy industry, LED and OLED technology has become one of the industries with the best growth potential, and the global LED and OLED market is getting bigger and bigger.
Market research firm SBI estimates that the global LED and OLED market today has more than $5 billion, with the US accounting for $1 billion. Compared with 2007, the growth rate is 50%. SBI further estimates that the global LED and OLED market will reach US$14 billion in 2013, while the US will reach a market size of US$3 billion.
The key to LED lighting is cost
LEDs are also more efficient at converting energy than traditional incandescent lamps. In general, LED conversion efficiency is 80%, while incandescent lamps are only 20%.
In the long run, the growing number of LED or OLED applications will eliminate the need to build too many power plants in many parts of the world, even as the global population grows and the demand for electricity increases. Because LEDs and OLEDs will be able to reduce the amount of electricity used by everyone and even users, once the popularity of LED lighting is higher, existing power plants are sufficient to meet demand.
One of the keys to hindering the popularity of LEDs and OLEDs today is cost. Once the price drops rapidly, perhaps the market size of LED and OLED will be larger and more popular.
Taiwan is now actively working to create a budget for the Energy Bureau of the Ministry of Economy and Economy of the People's Republic of China. The budget for the NT$200-300 million has been set. After the LED street lamp standard is set, the LED street lamp replacement plan will be launched. According to LEDinside estimates, the overall LED market in Taiwan will have a business opportunity of 40-500 billion yuan.
The following analyzes the causes of ONU energy waste:
1. The interface is idle.
ONU generally includes multiple interfaces. Such as FE interface, GE interface, POTS interface, WIFI and IPlV interface, etc. In many cases, only part of the interface is used, and energy is consumed when the interface is idle.
2. Increased energy consumption caused by chip module design.
In the ONU design, the modules are usually divided by function and integrated on the same chip, controlled by an enable terminal. When power is supplied, the entire module needs to be powered, and the unnecessary functional blocks are also consuming energy.
3. Processing of OLT data.
Due to the broadcast transmission characteristics of the OLT, when the OLT sends broadcast information or sends information to a certain ONU, other ONUs that do not receive the information must also process it, resulting in a waste of resources.
4. Idle monitoring.
For TDM-PON, each ONU can only send upstream data in burst mode in a time slot authorized by the OLT, and the OLT forwards downstream data in the form of broadcast frames, which makes all ONUs always in operation. The ONU does not know when the user or the OLT will send data to itself. The receiving and sending modules always keep monitoring. When a certain ONU has no upstream or downstream data for a long time, the normal operating state will make it consume more energy.
5. Waiting time.
The structure of the PON system determines that the channel capacity should be shared between ONUs in the upstream direction. The PON system needs to adopt a certain arbitration mechanism to avoid conflicts. Each ONU is allocated a time slot, and frames received from users are buffered first. It can only be sent when it arrives.
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