The grayscale of LED display refers to the brightness of the LED display, that is, the degree of brightness change of the pixel light.
It is an important indicator to measure the color richness and fineness of the LED display.
The following is a detailed explanation of the grayscale of LED display:
1. Definition and principle
Definition: Grayscale is the number of brightness levels that can be distinguished from black to white on the LED display. It determines the color range and detail level that the display can show.
Principle: The realization of grayscale is achieved by precisely controlling the brightness of each pixel. Specifically, it is through pulse width modulation (PWM) technology to adjust the ratio of the switching time to the off time of the LED light to control its brightness. Different grayscale levels correspond to different brightness levels, thereby achieving rich colors and delicate image effects.
2. Grayscale level division
The grayscale level of LED display mainly depends on the number of digital-to-analog conversion bits of the system. Common grayscale levels include:
8-bit system: 256 grayscale levels, that is, there are 256 brightness changes from black to white.
10-bit system: 1024 grayscale levels, that is, there are 1024 brightness changes from black to white.
12-bit system: 4096 grayscale levels, that is, there are 4096 brightness changes from black to white.
14-bit system: 16384 grayscale levels, that is, there are 16384 brightness changes from black to white.
The higher the grayscale level, the richer the color, the more delicate the image, and the richer the details that the display can show.
3. Influencing factors
System processing bits: The increase in the number of system processing bits will directly affect the number of grayscale levels.
LED light quality: High-quality LED lights can control brightness more accurately, thereby achieving higher grayscale levels.
Control circuit performance: Advanced control circuits can more accurately adjust the brightness of LED lights and improve the expression of grayscale levels.
Display refresh rate: A high refresh rate can ensure that stable grayscale performance can be maintained in rapidly changing images.
4. Application and selection
Private use: For general private use displays, 8-bit or 10-bit system LED displays are sufficient to meet the needs.
Commercial or broadcast products: For commercial or broadcast products that require higher color reproduction and detail expression, a 12-bit system or even a higher level system can be used.
When choosing an LED display, you need to choose the appropriate grayscale level and system configuration according to actual needs and usage scenarios.
At the same time, it should be noted that the higher the grayscale level, the corresponding cost will also increase.
Therefore, it is necessary to consider the cost-effectiveness and actual needs when choosing.