5, and the reconstruction of data storage technology

There are two types of memory organization: ① combination of pixels Act (Packed Pixel Method): that is, each pixel on the screen all the storage spaces are concentrated in a single store in the body; ②-plane (Bit Plane Method): that is, each pixel In a separate bit different storage in the body. Due to the use of a number of storage, they can be read out at the same time a more pixels of information. From two to analyze the structure of the storage, use of the bit-plane structure will help improve the LED display screen.

LED display screen to control the entire circuit diagram of the structure shown in Figure 3. The reconstruction of the data circuit to complete the conversion of RGB data, different pixels of the same power together, and then kept in the adjacent cell, thus in the form of digital data to complete the reorganization.

Reconstruction of the main data circuits have four major components: 8-bit parallel data transmission circuits; and 8 - string conversion circuit; 8-bit data latch circuit; 8-bit counter plus 1. R / G / B from the 8-bit data simultaneously treated by megapixel point-frequency parallel into the latch, 8 1 binary counter output pulse LD, the 8-bit data at the same time to latch and 8 - string conversion circuit By controlling the clock and complete the circuit - string conversion circuit controls the clock. Reconstruction of data, the storage of a body is no longer a value of the pixels, but the value of different pixels of the same power. With all the power stored together, so as to constitute a place-based digital storage structure of the plane. At a time when the contrary by the rules out the pixel value of neighboring rights.

Read and write address generator must meet the strict timing. On the same memory chips, can be divided into N-chip (with a value of the pixels that N-), each expressed a bit flat, after conversion to the pixels of the same into the memory, the first to write 0, write a Finally, write-N. 8Col × Row for the dot matrix display, there is every bit flat-8Col × Row. Memory depends on the internal organization of the on-screen pixel-driven pipe to connect the logic of relations. Based on memory, reading the address generator driven out by the line, then line-drive; write address generator is used by the drive-out, line drive out of the way so as to ensure that reading and writing simultaneously, the right to display the original image simultaneously Information.

Reference link: http://www.17led.com/LEDdisplay/2008-04/48p6.html