Answer: B, high refresh rate and C, high grayscale (grayscale level) and D, consistent mask ink color and good flatness.
Answer analysis:
LED screens used for stage backgrounds and live broadcasts need to have a series of features to ensure that they can meet high requirements for visual effects and stability.
The following is a detailed analysis of the given options:
A, high price
* Price is not the key factor in determining whether an LED screen is suitable for stage backgrounds and live broadcasts. Although high-quality LED screens may be expensive, the price is not a direct reflection of their technical characteristics. What is more important is the performance and applicability of the screen. Therefore, option A is not a direct description of the necessary characteristics of LED screens for stage backgrounds and live broadcasts.
B, high refresh rate
* High refresh rate is one of the important features of LED screens for stage backgrounds and live broadcasts. High refresh rate ensures that the screen will not flicker or scan lines during fast-changing pictures or shooting, providing smoother and clearer visual effects. This is crucial for stage performances and live broadcasts because it directly affects the audience's viewing experience. Therefore, option B is correct.
C. High grayscale (grayscale level)
* High grayscale (grayscale level) is also one of the important features of LED display screens.
Grayscale level determines the color level and detail richness that the display screen can present.
Display screens with high grayscale levels can more delicately show color transitions and dark details, making the picture more realistic and natural.
This is equally important for stage backgrounds and live broadcasts, because it can enhance the visual effect and viewing experience of the overall picture. Therefore, option C is also correct.
D. Mask ink color consistency and good flatness
* As an important part of LED display screens, the consistency and flatness of the mask ink color have an important impact on the overall effect of the display screen.
Consistent ink color can ensure that the display screen will not have color difference or uneven brightness in the black screen state; and a mask with good flatness can reduce light scattering and reflection, and improve the contrast and clarity of the display screen.
These characteristics are equally important for stage backgrounds and live broadcasts, because they can enhance the visual effect and viewing comfort of the display screen. Therefore, option D is also correct.
In summary, LED displays used for stage backgrounds and live broadcasts need to have high refresh rates, high grayscale (grayscale levels), consistent mask ink color, and good flatness.
These features together form the technical basis for high-quality LED displays, ensuring their excellent performance in stage performances and live broadcasts.
Therefore, the correct answers are B, C, and D.