led display control card and led display control system

Abstract

The present invention relates to an LED display screen control card and an LED display screen control system. The LED display screen control card comprises a microcontroller circuit or a microprocessor circuit, a dynamic random access memory, and a programmable logic device. The dynamic random access memory is externally connected with the programmable logic device. The microcontroller circuit or the microprocessor circuit can be adopted as a co-processor of the programmable logic device. The programmable logic device is provided with a resolution identification module, an input buffer, an RAM control module, an anti-color error processing module, a sub-pixel encoding module, and an output buffer. Therefore, the anti-color error processing function and the sub-pixel sampling function are realized. In this way, high-definition images are displayed at a limited cost or on an LED display screen relatively low in physical resolution.

Description

technical field [0001] The invention relates to the technical field of image processing and display, in particular to an LED display screen control card and an LED display screen control system. Background technique [0002] Modern flat-panel displays mostly use the spatial method to synthesize colors, and each pixel on the display contains subpixels capable of producing three primary colors. When the sub-pixel pitch is small enough, color mixing occurs to present a variety of different colors. The sub-pixels of the LED full-color display screen correspond to light-emitting diodes of different primary colors (such as red, green, and blue). Under the control of the driving signal, the three primary colors are mixed to present various colors and form an LED pixel. . In the process of displaying images on the LED display, the pixel data of the video source can be completely mapped to the LED display one-to-one. [0003] The LED full-color display screen occupies almost the e...

AI Technical Summary

Problems solved by technology

[0004] In order to achieve high-resolution LED display, LED sub-pixel multiplexing technology has been proposed in the prior art; however, sub-pixel multiplexing technology only increases the addressability of the system and increases the scale of displayable images, but it will cause blurred images effect, which can not effectively improve the image clarity

[0005] The prior art also proposes a direct sub-pixel downsampling technology, which regards a single-primary color sub-pixel as a full-color pixel as the basic unit of addressing, and can significantly increase the sampling rate of the system when only brightness is considered, showing more Delicate and clear images increase the perceived resolution of the system; however, due to the spatial color mixing effect of the human visual system, although the image displayed after sub-pixel downsampling can produce a display effect that is basically consistent with the original image, in practical applications , with the gradual increase of image frequency, the color shift produced by sub-pixel downsampling causes some aliasing phenomenon in the original digital image to be very obvious in the image, it can be seen that sub-pixel downsampling is to improve the perception of the display system at the cost of color errors resolution; therefore, how to eliminate or reduce color errors is the key to the wider application of sub-pixel downsampling technology

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