[ Huaqiang Security Network News ] This article China Security Network Xiaobian introduces you to the main functions of the LED display scanning board. 
<br> master is the master function data acquisition card for storing temporarily and format conversion, and transmits the data to the display partition. There are 2 data transmission ports on the main controller, each port can control 512 lines of data, and determine how many transmission cards are needed according to the actual number of display lines.
Grayscale, grayscale grayscale can also be considered as brightness. In the LED display industry, it specifically refers to the luminance of each primary color. The luminance of the primary color is divided by the intensity, which is the gray level. The higher the gray level that the display can produce, the more colors it displays, but the higher the cost. For example, the 16-level gray double-primary display can display 16X16=256 colors. At present, there are two technical grades of 16-level gray scale and 256-level gray scale.
Nonlinear gray-scale modulation <br> Just like people's perception of sound, the human eye's perception of light intensity is also non-linear, that is to say, when the light intensity increases by one level, the increase perceived by the human eye is higher than one. On the contrary, when the light is strong, the light intensity increases by one level, and the increase perceived by the human eye is less than one level. Therefore, if the gray scale output of the display screen is output in equal proportions, the gray level change actually perceived is not proportional, and the gray level level is not clear. For example, the linear 16-level gray scale gives the impression that the brightness of the first 6 levels is too large, and the brightness of the last 6 levels is hardly increased, and the color distortion is severe. Therefore, the gray scale must be output according to a nonlinear law to correct the visual deviation of the human eye, thereby obtaining a more realistic color effect. Linear grayscale modulation has been eliminated. When choosing a multi-gray display, you should not only look at the grayscale level, but also whether there is a nonlinear grayscale correction function.
Scanning frequency <br> Like a TV set, the indoor LED display also uses a dynamic scan display. The traditional TV set uses a 50Hz scanning frequency, which gives the impression that the display has slight jitter and up and down rolling ripples, which can easily cause eye fatigue. Therefore, high-end TV sets are now introducing 100Hz scanning technology to eliminate this phenomenon. LED displays have the same problem, so scanning frequency has become an important indicator of display. For example, the scanning frequency of the color display of Shenzhen Aibisen Industrial Co., Ltd. is more than 150Hz, which effectively eliminates flicker and jitter, and the picture is very stable.
CRT Synchronous Display <br> Most computer monitors use CRT tubes, so computer monitors are sometimes called CRT monitors. CRT synchronous display means that the display content of the LED display can reflect the display content on the computer CRT display in real time and synchronously.
The CRT synchronous display is automatically implemented by hardware through the LED card mounted on the host without software intervention. In this way, the LED display screen is like a mirror display connected to the computer. The content displayed on the computer display, the LED display automatically follows the display, and the functions of the computer multimedia can be realized on the LED display, and the user displays the LED. The control of the screen is simplified to the control of the computer display, greatly improving the software utilization rate, and facilitating the user to develop the software independently.
Grayscale, grayscale grayscale can also be considered as brightness. In the LED display industry, it specifically refers to the luminance of each primary color. The luminance of the primary color is divided by the intensity, which is the gray level. The higher the gray level that the display can produce, the more colors it displays, but the higher the cost. For example, the 16-level gray double-primary display can display 16X16=256 colors. At present, there are two technical grades of 16-level gray scale and 256-level gray scale.
Nonlinear gray-scale modulation <br> Just like people's perception of sound, the human eye's perception of light intensity is also non-linear, that is to say, when the light intensity increases by one level, the increase perceived by the human eye is higher than one. On the contrary, when the light is strong, the light intensity increases by one level, and the increase perceived by the human eye is less than one level. Therefore, if the gray scale output of the display screen is output in equal proportions, the gray level change actually perceived is not proportional, and the gray level level is not clear. For example, the linear 16-level gray scale gives the impression that the brightness of the first 6 levels is too large, and the brightness of the last 6 levels is hardly increased, and the color distortion is severe. Therefore, the gray scale must be output according to a nonlinear law to correct the visual deviation of the human eye, thereby obtaining a more realistic color effect. Linear grayscale modulation has been eliminated. When choosing a multi-gray display, you should not only look at the grayscale level, but also whether there is a nonlinear grayscale correction function.
Scanning frequency <br> Like a TV set, the indoor LED display also uses a dynamic scan display. The traditional TV set uses a 50Hz scanning frequency, which gives the impression that the display has slight jitter and up and down rolling ripples, which can easily cause eye fatigue. Therefore, high-end TV sets are now introducing 100Hz scanning technology to eliminate this phenomenon. LED displays have the same problem, so scanning frequency has become an important indicator of display. For example, the scanning frequency of the color display of Shenzhen Aibisen Industrial Co., Ltd. is more than 150Hz, which effectively eliminates flicker and jitter, and the picture is very stable.
CRT Synchronous Display <br> Most computer monitors use CRT tubes, so computer monitors are sometimes called CRT monitors. CRT synchronous display means that the display content of the LED display can reflect the display content on the computer CRT display in real time and synchronously.
The CRT synchronous display is automatically implemented by hardware through the LED card mounted on the host without software intervention. In this way, the LED display screen is like a mirror display connected to the computer. The content displayed on the computer display, the LED display automatically follows the display, and the functions of the computer multimedia can be realized on the LED display, and the user displays the LED. The control of the screen is simplified to the control of the computer display, greatly improving the software utilization rate, and facilitating the user to develop the software independently.
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