Programmable logic device and its sub-pixel down-sampling method and data encoding circuit

Abstract

The present invention relates to a programmable logic device, a sampling method under sub pixel, and related application. The device comprises a resolution recognizing module which identifies the resolution of the inputted original image data; an input buffer which buffers the inputted original image data, a RAM control module which controls to write the original image data buffered into the input buffer into an external RAM for programming the logic device; an anti-color error processing module which receives the original image data read from the external RAM for convolution operation according to a preset size template in order to obtain image data subject to color error-resistant processing and store the image data into the external RAM; a sub pixel coding module which receives the image data subject to the color error-resistant processing and read from the external RAM for sample under sub pixel in order to obtain image data under sub pixel; and an output buffer which buffers the sampled image data for outputting. When a display screen has limited cost or low physical resolution, high definition pictures can be displayed on the display screen.

Description

technical field [0001] The invention relates to the technical field of image processing and display, in particular to a programmable logic device, a sub-pixel down-sampling method thereof, and a data encoding circuit. Background technique [0002] Most modern flat-panel displays use spatial methods to synthesize color, with each pixel on the display consisting of sub-pixels capable of producing three primary colors. When the sub-pixel pitch is small enough, color mixing occurs to produce a variety of different colors. The sub-pixels of the LED full-color display correspond to light-emitting diodes of different primary colors (such as red, green, and blue primary colors). Under the control of the driving signal, the three primary colors present various colors through color mixing 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] LED full-color ...

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

Images