Answer: B, 1R1G1B.
Answer analysis:
When discussing the pixel composition of LED display screens, we must first understand the basic building block of LED display screens - pixels. Pixels are the smallest unit of an image and are composed of LED lights of different colors to display different colors and brightness.
Now, let's analyze each option one by one:
A, 2R1G1B: This option means that each pixel is composed of two red LEDs (R), one green LED (G) and one blue LED (B). This configuration is not common in LED displays because it increases the number of red LEDs and may be used for specific display needs, such as enhancing the display effect of red. But in general LED displays, this configuration is not used.
B, 1R1G1B: This option means that each pixel is composed of one red LED (R), one green LED (G) and one blue LED (B). This is the most common pixel configuration in LED displays because it can accurately mix almost any color to provide high-quality color display effects.
C, 1R2G: This option contains only red and green LEDs, without blue LEDs. This configuration cannot provide a complete color display effect because it lacks the blue component and cannot mix blue and other colors participated by blue.
D, 1R1G: This option is similar to option C, but the number of green LEDs is reduced to one. This configuration also cannot provide a complete color display effect because it lacks blue and sufficient green components.
In summary, in order to provide high-quality color display effects, LED displays usually adopt a 1R1G1B pixel configuration.
This method ensures that each pixel can accurately mix the required color, thereby presenting a clear and vivid image.
Therefore, the correct answer is B, 1R1G1B.