Answer: A. High brightness, B. Long life, C. Wide viewing angle, D. Low power consumption.
Answer analysis: LED display, as a widely used display technology, has many significant features. For the given options, we can analyze them one by one:
A. High brightness: The brightness of LED display is indeed very high, thanks to the efficient light-emitting performance of LED light-emitting diodes. Whether in indoor or outdoor environments, LED display can maintain a high brightness to ensure that the displayed content is clearly visible. Therefore, this option is correct.
B. Long life: The service life of LED display is relatively long, mainly due to the stability and durability of LED light-emitting diodes. Generally speaking, the service life of LED can reach more than tens of thousands of hours, far exceeding traditional display technology. Therefore, this option is also correct.
C. Wide viewing angle: LED display usually has a large viewing angle, which means that the audience can clearly see the display content from different angles. This feature gives LED display a significant advantage in occasions where a wide audience coverage is required, such as outdoor billboards, stadiums, etc. Therefore, this option is also correct.
D. Low power consumption: Although LED displays have lower power consumption relative to traditional lighting devices (such as incandescent lamps), their power consumption is not always the lowest compared to other display technologies (such as LCD). In particular, in high-brightness, large-size application scenarios, the power consumption of LED displays may be relatively high. However, in general, LED displays are still a relatively energy-efficient display technology. However, in the context of this question, we are more focused on direct comparisons with other LED-related characteristics, so it can be considered that LED displays are optimized in terms of power consumption relative to traditional display technologies, but their power consumption performance still needs to be evaluated based on specific application scenarios. However, for the purpose of answering this question, we can accept that this option is a feature of LED displays, although its relativity may vary depending on the specific situation.
In summary, the main characteristics of LED displays include high brightness, long life, large viewing angle, and (in a relative sense) low power consumption.
Therefore, all of the given options A, B, C, and D are correct. But if we want to be precise about the absoluteness of each option, we need to note that the description of "low power consumption" may need to be evaluated based on specific application scenarios. However, in the context of this question, we can consider all options as characteristics of LED displays.