CN201570228U

CN201570228U - Led dot matrix display board

Info

Publication number: CN201570228U
Application number: CN2009203169567U
Authority: CN
Inventors: 岳坤
Original assignee: Xian University of Technology
Current assignee: Xian University of Technology
Priority date: 2009-12-10
Filing date: 2009-12-10
Publication date: 2010-09-01
Anticipated expiration: 2019-12-10

Abstract

The utility model provides an LED dot matrix display board which comprises a control part of a single chip microcomputer and a display driving part connected with the control part of the single chip microcomputer, wherein the control part of the single chip microcomputer comprises a single chip microcomputer, a data memory, a latch and an interface chip; the display driving part consists of a line scanning signal shift register, a column dot matrix data shift register, a decoder, a line driving circuit and 28 pieces of 8*8 LED dot matrix modules; an output end of the line scanning signal shift register is connected with an input end of the column dot matrix data shift register; an output end of the column dot matrix data shift register is connected with input ends of the 8*8 LED dot matrix modules; the output end of the line scanning signal shift register is connected with an input end of the decoder; an output end of the decoder is connected with an input end of the line driving circuit; and an output end of the line driving circuit is connected with the input ends of the 8*8 LED dot matrix modules. The LED dot matrix display board has the benefits of having simple display principle and low cost, and realizing dynamic shifting display of any multiple characters.

Description

LED dot matrix display board

Technical field

The utility model belongs to the display technique field, is specifically related to a kind of LED dot matrix display board.

Background technology

LED dot matrix display board waits the place all to be widely used in public, is used to show Chinese character, character and image information.The principle that the LED dot matrix shows is that in the PN junction of some semiconductor material, the minority carrier of injection and majority carrier compound tense can discharge the form of unnecessary energy with light, thereby electric energy directly is converted to luminous energy.PN junction adds reverse voltage, and minority carrier is difficult to inject, so not luminous.The glow color of LED is relevant with material and the technology of making LED with luminescence efficiency, present widely used three kinds of the red, green, blues that have.Because LED operating voltage low (only 1.5-3V), can active illuminating and certain brightness is arranged, brightness can use voltage (or electric current) to regulate again, itself is shock-resistant again, anti-vibration, life-span long (100,000 hours), so in large-scale display device, display mode and the LED display mode of still not having other at present are equal to.Make the red and green LED display screen of making as a pixel of putting together dual base color screen or pseudo-colours shield; Three kinds of LED of red, green, blue are shielded or full-color screen three primary colours to the display screen of putting together as a pixel.The Pixel Dimensions of LED screen generally is the 2-10 millimeter in the make-up room, usually adopt several LED die package that can produce different base colors are integral, the Pixel Dimensions of outdoor LED screen mostly is the 12-26 millimeter, each pixel is made up of several various monochromatic LEDs, and common finished product claims pixel barrel or picture element module.If LED display is wanted displayed image, the luminosity of each LED of then pattern of wants pixel all must be able to be regulated, and the fine degree of its adjusting is exactly the gray shade scale of display screen.Gray shade scale is high more, and the image of demonstration is just fine and smooth more, and color is also abundant more, and corresponding display control program is also complicated more.Under current technical merit, 256 grades of image gray, color transition is very soft, and the image restoring effect is more satisfactory.But the LED dot matrix display board displaying principle complexity of prior art, the cost height.

Summary of the invention

The purpose of this utility model provides a kind of LED dot matrix display board, has solved LED dot matrix display board displaying principle complexity in the prior art, the shortcoming that cost is high.

The technical scheme that the utility model adopted is: a kind of LED dot matrix display board comprises Single-chip Controlling part and the display driving part that is attached thereto; Described Single-chip Controlling partly comprises single-chip microcomputer, data-carrier store, latch and interface chip; The output terminal of single-chip microcomputer is connected with the input end of latch, and the output terminal of latch is connected with the input end of data-carrier store, and the output terminal of single-chip microcomputer is connected with the input end of data-carrier store; Described display driving part is made up of line scan signals shift register, row dot array data shift register, code translator, horizontal drive circuit and 28 8 * 8LED lattice modules; Line scan signals shift register output terminal is connected with row dot array data shift register input end, row dot array data shift register output terminal is connected with 8 * 8LED lattice module input end, line scan signals shift register output terminal is connected with the input end of code translator, the output terminal of code translator is connected with the input end of horizontal drive circuit, and the output terminal of horizontal drive circuit is connected with the input end of 8 * 8LED lattice module.

The beneficial effects of the utility model are that displaying principle is simple, and is with low cost, can realize that the dynamic displacement of any a plurality of characters shows.

Description of drawings

Fig. 1 is the utility model Single-chip Controlling part theory diagram;

Fig. 2 is the utility model display driving part theory diagram.

Among the figure, 1. interface chip, 2. single-chip microcomputer, 3. latch, 4. data-carrier store, 5. line scan signals shift register, 6. code translator, 7. horizontal drive circuit, 8.8 * 8LED lattice module, 9. row dot array data shift register.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is elaborated.

The utility model discloses a kind of LED dot matrix display board, comprise Single-chip Controlling part and the display driving part that is attached thereto; As shown in Figure 1, Single-chip Controlling partly comprises single-chip microcomputer 2, data-carrier store 4, latch 3 and interface chip 1; The output terminal of single-chip microcomputer 2 is connected with the input end of latch 3, and the output terminal of latch 3 is connected with the input end of data-carrier store 4, and the output terminal of single-chip microcomputer 2 is connected with the input end of data-carrier store 4.As shown in Figure 2, display driving part is made up of line scan signals shift register 5, row dot array data shift register 9, code translator 6, horizontal drive circuit 7 and 28 8 * 8LED lattice modules 8; Line scan signals shift register 5 output terminals are connected with row dot array data shift register 9 input ends, row dot array data shift register 9 output terminals are connected with 8 * 8LED lattice module, 8 input ends, line scan signals shift register 5 output terminals are connected with the input end of code translator 6, the output terminal of code translator 6 is connected with the input end of horizontal drive circuit 7, and the output terminal of horizontal drive circuit 7 is connected with the input end of 8 * 8LED lattice module 8.

Principle of work of the present utility model is, Data Receiving correct and treated deposit the display buffer in after, promptly control the demonstration of display board.Display mode adopts progressive scan mode, single-chip microcomputer 2 is at first got first line data from the display buffer, output to data-carrier store 4, sealing in and going out mode and export at 8 bit parallel output terminals by turn by line scan signals shift register 5, the data of data-carrier store 4 output terminals also move into serial output terminal by turn simultaneously, and are outputed to down the data serial input end of a slice display driving part by serial output terminal.Output to the parallel output terminal of row dot array data shift register 9 when some line data after, send 8 line scan signals to line scan signals shift register 5 by single-chip microcomputer 2 step-by-steps again, like this, 8 line scan signals of data bit of line scan signals shift register 5 outputs, the data of row dot array data shift register 9 outputs are the dot array data of some row.Single-chip microcomputer 2 sends data latch signal then, line scan signals is latched into code translator 6, the some row dot array data that shows is latched into the output terminal of latch 3, thereby light the LED of delegation of display board, after time-delay a period of time, light next line more successively, promptly realize the demonstration of lining by line scan of display board.

Claims

1. a LED dot matrix display board is characterized in that: comprise Single-chip Controlling part and the display driving part that is attached thereto; Described Single-chip Controlling partly comprises single-chip microcomputer (2), data-carrier store (4), latch (3) and interface chip (1); The output terminal of single-chip microcomputer (2) is connected with the input end of latch (3), and the output terminal of latch (3) is connected with the input end of data-carrier store (4), and the output terminal of single-chip microcomputer (2) is connected with the input end of data-carrier store (4); Described display driving part is made up of line scan signals shift register (5), row dot array data shift register (9), code translator (6), horizontal drive circuit (7) and 28 8 * 8LED lattice modules (8); Described line scan signals shift register (5) output terminal is connected with row dot array data shift register (9) input end, row dot array data shift register (9) output terminal is connected with 8 * 8LED lattice module (8) input end, line scan signals shift register (5) output terminal is connected with the input end of code translator (6), the output terminal of code translator (6) is connected with the input end of horizontal drive circuit (7), and the output terminal of horizontal drive circuit (7) is connected with the input end of 8 * 8LED lattice module (8).