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LED display circuit board design and material use are crucial to the stability and effectiveness of the
1. Material requirements: PCB thickness, generally 1.6mm thickness; Material: FR-4 fiberglass board, some manufacturers may use FR-2 paper substrate to reduce costs; copper foil thickness: thickness of copper foil The heat dissipation and circuit stability of the PCB board can not be ignored. The normal copper foil thickness is 35um (1Oz), and some manufacturers will use 18um (0.5Oz) copper foil thickness to shoddy; then as a consumer How can one distinguish between them? You can use an empty PCB to distinguish by weight. Under normal circumstances, the heavier the better.
2, a few key points in the design: connectors, connectors refers to the connector between the module and the module, and now there are more than two main uses in the market, one is a horn, one is row needle. The advantage of ox horn is that it can block the cable through two card slots, and it is not prone to malfunctions caused by connector problems; the choice of electrolytic capacitors and tantalum capacitors is the first choice for applications requiring long life. Tantalum capacitors are undoubtedly the first choice. Where low prices are required, electrolytic capacitors are preferred.
Automated production equipment
Most of the screens are electronic components, and the static electricity is very harmful to the electronic components. Sometimes static electricity directly breaks down the components to make them damaged. Sometimes it does not directly breakdown, but the hidden danger is the side effect. The device is damaged after a period of use. In the electronics manufacturing industry, people think of a lot of methods for the treatment of artificial static electricity, including wearing electrostatic rings, wearing static clothing, and using clean rooms. In fact, the most effective method is to avoid human contact with electronic components as much as possible, and the use of automation equipment to achieve this goal, LED display manufacturers.
Average power consumption
The square power consumption refers to the power consumption of a square meter of LED display. The unit of power that we usually say is watts/hour. For example, the power consumption of a square meter LED display is 300 watts, and this display consumes 300 watts/hour per hour per square meter, which is what we often call 0.3 kWh. The power consumption of LED display generally has two indicators, one is the maximum power consumption, and the other is the power consumption. The maximum power consumption refers to the power consumption of the maximum brightness of the LED display. How to use the eyes to distinguish the maximum power consumption? The method is very simple: look at the amount of power behind the cabinet, multiplied by the maximum power of each power supply, according to the box The maximum power consumption for a square meter can be calculated in terms of size. There are two types of power supplies that are commonly used, 200W and 300W power supplies.
Indoor small pitch: low light high gray
The low-light and high-gray are specifically explained as follows: When the brightness of a small-pitch LED display is in a range of 100cd/-300cd/zone, the gray level of the display screen is not lost, or the degree of gray-level loss is within the range that the human eye cannot detect. Low-light and high-gray will be one of the key factors in distinguishing the quality of small-pitch LED display products. For small-pitch products, the LED display will no longer be a comparison of high brightness, but rather low brightness. It is better than the display of one's home that can reduce the brightness without losing the grey scale and picture quality. In other words, only the low-gray and high-gray small-pitch LED display is a good product that meets the requirements of users and has competitive strength. LED tile display.
The human eye is under the indoor dark environment, and looks closely at the high-pitch, small-pitch LED display for a long period of time. The unique high luminance of the LED often makes people feel dazzling, and even causes eye pain, tearing, and vision loss. Therefore, LED display brightness is too high, will bring visual fatigue to the user of indoor applications, and even serious may cause irreparable damage to the human eye! It can be said that the brightness of small-pitch LED display is definitely not the higher the better, it must be The brightness drops down. A large number of tests show that the LED display's brightness range is controlled at a brightness range of 100cd/-300cd/, and the human eye feels comfortable.