Stroke type symbol generator and method for improving its display effect
A generator, stroke-type technology, applied in instruments, static indicators, etc., can solve the problems of different performance effects and not completely eliminated, and achieve the effect of solving the "burr" interference, improving the smoothing effect, and improving the quality of the symbol display.
Active Publication Date: 2015-08-05
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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Problems solved by technology
The other is that the current-mode DA converter cooperates with the operational amplifier and the sample-and-hold device to output the driving signal. The principle is to detect separately and filter out the glitches of individual range conversion points. This solution has different effects on different hardware modules and cannot be completely eliminated.
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[0019] 1. Stroke symbol generator
[0020] Such as figure 1 As shown, the stroke type symbol generator includes a vector generator 1, the output of the vector generator 1 is respectively connected to a DA converter 4 and a sample-and-hold device 6, and the signal output of the DA converter 4 is connected to the signal input of an operational amplifier 5 terminal, the signal output of the operational amplifier 5 is connected to the signal input terminal of the sample-and-hold device 6, the DA converter is provided with ports for inputting the X and Y deflection coordinates output by the vector generator, and the sample-and-hold device is provided with a sample-and-hold for the vector generator Port for signal input. The DA converter is DAC-HF12BMM, the operational amplifier is AM500, and the sample and hold device is AD585SE.
[0021] The character generation logic module 2 in the vector generator 1 of the stroke-type symbol generator generates two channels of 12-bit digital ...
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The invention relates to a stroke type symbol generator and a method for improving the display effect of the stroke type symbol generator. The symbol generator comprises a vector generator, wherein the output end of the vector generator is connected to a digital-analog (DA) converter and a sampling holder respectively, the DA converter and the sampling holder are connected through an operational amplifier, the DA converter is provided with a port for input of X and Y deflection coordinates output by the vector generator, and the sampling holder is provided with a port for input of sampling holding signals of the vector generator. By the aid of the DA converter, the operational amplifier and a sampling holder hardware circuit, X and Y deflection analog signal output is achieved. Sampling holding signals are controlled through the relation between the symbol output and the symbol wiring speed rate in the vector generator, and the smooth output of deflection signals is achieved. The inherent glitch interference generated in the converting process of a DA chip is solved, the smooth effect of output symbols of the symbol generator can be improved and the symbol displaying quality is improved.
Description
technical field [0001] The invention belongs to the technical field of symbol generation in airborne display equipment, and relates to a stroke type symbol generator and a method for improving its display effect. Background technique [0002] The head-up display or helmet-mounted display accurately projects the symbols to be displayed into the driver's front field of view, so that various information and real external scene information are superimposed together, and these display symbols are generated by the symbol generator. [0003] The symbol generator is the source of the entire character output, and the quality of its output signal directly determines the terminal display effect. Various graphics (lines, circles, characters) on the status screen of the head-up display can be regarded as a combination of several straight line segments. The higher the character conversion accuracy, the higher the resolution, the more output points, and the more delicate the formed line se...
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IPC IPC(8): G09G3/20
Inventor 王灵刚高海峰李洁
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC