With the continuous progress of science and technology, led display plays an increasingly important role in various application scenarios, whether it is outdoor billboards, indoor conference display or stage background, led display has won wide recognition in the market with its excellent performance and display effect. However, for the core parameters of the led display - gray scale and brightness, many users may still have some doubts. The following will be an in-depth analysis of the relationship between led display gray scale and brightness, to help you better understand this technology.

First, the basic concepts of gray scale and brightness

First, we need to clarify the basic concepts of grayscale and brightness. Grayscale, also known as grayscale or brightness, refers to how light and dark each pixel on the display is. For digital display technology, grayscale is the determining factor of display color number. In general, the higher the gray level, that is, the higher the number of gray classes, the richer the color presented by the led display, the more delicate the picture, and the easier it is to show rich details. The brightness refers to the overall luminous intensity of the display, which is an important indicator to measure the brightness of the display.

Second, the close relationship between gray level and brightness

Grayscale and brightness are not isolated in the led display, but are interrelated and influence each other. The gray level of the led display is closely related to the brightness, and the precise control of the brightness can be achieved by adjusting the gray level. Specifically, changing the current flowing through the LED or using pulse width modulation (PWM) technology are effective ways to control the gray level and then adjust the brightness.

Third, gray control method

Gray control is the key technology to achieve different brightness levels of led display. There are two common gray control methods: changing the current flow and pulse width modulation (PWM).

1. Change the current that flows

Principle: By adjusting the size of the current flowing through the LED to change its luminous brightness, so as to achieve grayscale control. In general, the brightness of the LED is proportional to the current flowing, but the relationship between the brightness and the current of the red LED may not be completely proportional due to the saturation phenomenon.

② Application: This method is more direct, but in practical applications, it is necessary to pay attention to the stability and safety of the current, and avoid excessive current leading to LED damage.

2, pulse width modulation (PWM)

Principle: PWM technology by periodically changing the width of the light pulse (that is, duty cycle) to control the lighting time of the LED, so as to achieve gray adjustment. At a high enough refresh frequency, the human eye cannot detect the change in brightness, so a continuous brightness adjustment effect can be achieved.

2 Advantages: PWM technology is more suitable for digital control, and can effectively reduce power consumption, so it has been widely used in modern led displays. Through PWM technology, it is easy to achieve a high gray display effect, improve the fine and color richness of the picture.

③ Implementation mode: The scanning board will decompose the gray value from the main control box, and then serial transmission to the corresponding LED in the form of pulses. Each LED has its own pulse width modulator to control the lighting time, thus achieving precise control of the gray level.

Fourth, gray adjustment brightness technology

The technology of gray adjustment brightness is essentially to change the overall brightness of the led display by controlling the gray level. Because there is a direct relationship between gray level and brightness, the brightness can be adjusted by adjusting the gray level.

1、灰度等級與亮度的關(guān)系

灰度等級越高，意味著顯示屏能夠呈現(xiàn)更多的亮度級別，從而能夠?qū)崿F(xiàn)更細(xì)膩的亮度調(diào)節(jié)效果。在實(shí)際應(yīng)用中，可以根據(jù)需要選擇合適的灰度等級來匹配不同的亮度需求。

2、調(diào)節(jié)過程

在led顯示屏的控制系統(tǒng)中，通過調(diào)整灰度控制參數(shù)來改變灰度等級。這些參數(shù)可能包括電流大小、PWM信號的占空比等。根據(jù)不同的調(diào)節(jié)方法（改變電流或PWM），系統(tǒng)會相應(yīng)地調(diào)整這些參數(shù)以實(shí)現(xiàn)亮度的調(diào)節(jié)。

3、實(shí)際應(yīng)用

在實(shí)際應(yīng)用中，灰度與亮度的平衡至關(guān)重要。過高的亮度雖然能帶來強(qiáng)烈的視覺沖擊，但長時(shí)間觀看可能會對人眼造成不適；而過低的亮度則可能導(dǎo)致畫面細(xì)節(jié)丟失，影響觀看體驗(yàn)。因此，根據(jù)應(yīng)用場景的不同，合理調(diào)節(jié)led顯示屏的灰度和亮度顯得尤為重要。

For example, in an outdoor high-light environment, in order to ensure that the content of the display is clearly visible, it is usually necessary to increase the brightness of the display; In the indoor low-light environment, the brightness can be appropriately reduced to reduce visual fatigue. At the same time, by optimizing the gray level, the fineness and color richness of the picture can be further improved, bringing users a more comfortable viewing experience.

In summary, there is a close relationship between the gray level and brightness of the led display. By scientifically and reasonably adjusting gray scale and brightness parameters, the performance advantages of the led display can be fully exploited to bring users a more high-quality and efficient visual experience. With the continuous progress of technology and the continuous expansion of applications, we have reason to believe that led display will show its unique charm and value in more areas.