What is the meaning of several scans of LED display screen? There are several driving scanning modes of LED display screen
Author:Fan Lu Time:2021-06-11 13:35 Browse(610)
The driving mode of LED display is constant current driving, which is divided into static scanning and dynamic scanning, and the dynamic scanning is divided into 1 / 2, 1 / 4, 1 / 8 and 1 / 16 scanning. If the driving circuit lights up all the pixels on the screen each time, it is called static driving. If the rows or columns lit up each time are discontinuous, for example, there are 1,2,3,4,5,6,7,8,9,10... Rows of pixels, one and nine rows are lit up at one time, then in a very short time, 1 and 9 are off, 2 and 10 are on, and then in a very short time, 3 and 11 are on, that is 1 / 8 scan; If 1 and 5 are on, change to 2 and 6 after a short time, and so on, it is 1/
The driving mode of LED display screen is constant current driving, which can be divided into static scanning and dynamic scanning, and dynamic scanning can be divided into 1 / 2, 1 / 4, 1 / 8 and 1 / 16 scanning.
if the driving circuit lights up the pixels composed of all LED lights on the screen each time.

it is called static driving.
if the rows or columns lit each time are discontinuous.
for example, if there are 1,2,3,4,5,6,7,8,9,10... Rows of pixels, one and nine rows are lit at a time, Then in a very short time, 1 and 9 turn off, 2 and 10 turn on, and then in a very short time, 3 and 11 turn on, that is 1 / 8 scan; If 1 and 5 are on, change to 2 and 6 after a short time, and so on, it is 1 / 4 scan; If 1 and 3 are on, it's 1 / 2 scan if 2 and 4 lines are on in a flash.
because people have the characteristics of visual persistence.
they can't see that the light has been off, and it looks like it's always on.
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in the LED electronic display full-color.
in monochrome and two-color series products, the scanning methods include 1 / 16, 1 / 8, 1 / 4, 1 / 2, static, etc.
in this paper, the scanning methods are as followsIn brief.
the real pixel screen refers to the end of each of the red, green and blue light-emitting diodes which constitute the LED display screen only participates in the imaging application of one pixel, so as to obtain the satisfied brightness.
the real pixel screen is a kind of LED display screenVirtual pixel is to use software algorithm to control the end of each color led to participate in the imaging side of multiple adjacent pixels.
and then make use of fewer lamps to complete a larger resolution, which can make the display resolution improve four times.
in this paper, a virtual pixel is proposedIt refers to 16 lines of one scan.
8 lines of one scan, 4 lines of one scan. It is a scanning mode. In short, one IC and one pin output can control 16, 8 and 4 LEDs, and the scanning speed is very fast,1 / 4 scan refers to scanning 4 lines at a time, 1 / 8 scan and 1 / 16 scan are the same, depending on how many line signals there are, two are 1 / 4, three are 1 / 8 and four are 1 / 16.
the results show that 1 / 4 scan is the same as 1 / 16 scan   Take 1 / 16 scanning mode for example.
16 lines share a 595 device driver, and the lighting time of each line is 1 / 16 of the whole scanning cycle. If it is 1 / 4 scanning, then the lighting time of each line is 1 / 4 of the whole scanning cycle, so the duty cycle of 1 / 4 scanning circuit is not higher than that of 1 / 16? That is to say, the lighting time of each line is relatively long, and the 1 / 4 mode is brighter than the 1 / 16 modeThe current market led display can be roughly divided into static scanning and dynamic scanning two methods! Static scanning is divided into static real pixels and static virtual! Dynamic scanning can also be divided into dynamic real image and dynamic virtual image.
there are 2, 4, 8 and 16 scansVirtual pixel is to use software algorithm to control the end of each color led to participate in the imaging side of multiple adjacent pixels.
and then use fewer lamps to complete larger resolution, which can make the display resolution improve four times.
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