Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for overcoming laser modulation power waviness

A laser, modulated waveform technology, applied in optics, instruments, optical components, etc., can solve the problems of modulating power ripple, reducing laser display contrast and color effect, etc., to overcome the influence, eliminate the influence of dark spots or dark lines, improve contrast and The effect of the color effect

Inactive Publication Date: 2009-02-11
SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the modulation process of some lasers, there will be ripples in the modulation power, such as figure 1 shown
When scanning, this can cause dark spots or lines on the display, reducing contrast and color in laser displays

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for overcoming laser modulation power waviness
  • Method for overcoming laser modulation power waviness
  • Method for overcoming laser modulation power waviness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be further described now in conjunction with the accompanying drawings.

[0018] Such as figure 1 As shown, the modulation power ripple is a kind of power fluctuation, and its performance characteristic is a kind of power deviation in the modulation output signal of the laser.

[0019] Such as figure 2 As shown in the waveform, the invention of the present invention is to superimpose the secondary high-frequency modulation signal on the main modulation waveform, so that the power fluctuation of the modulation waveform is submerged in the high-frequency signal. In this way, the contrast and color effect of the laser display will not be reduced in the response of the human eye, and the equivalent waveform diagram is as follows image 3 shown.

[0020] Further, the frequency of the secondary high-frequency modulation signal exceeds the frequency of the high-frequency signal that human eyes respond to. The higher the frequency of the high-fre...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of laser display, in particular to a laser modulation power wave overcoming method in the field. The method comprises the following steps: an auxiliary high-frequency modulation signal is overlapped on a main modulation waveform; furthermore, the frequency of the auxiliary high-frequency modulation signal exceeds the frequency of an eye responsive high-frequency signal; the auxiliary high-frequency modulation signal can be a square wave, a sine wave, a triangle wave or an irregular noise signal; and the auxiliary high-frequency modulation signal is indirectly overlapped through the drive of a circuit, or is directly overlapped through the laser. The method overcomes the laser modulation power wave influence on the laser display, eliminates the influence of the produced dark spots or dark lines of display pictures, and improves the contrast ratio and the color effect of the laser display.

Description

technical field [0001] The invention relates to the technical field of laser display, in particular to a method for overcoming laser modulation power ripple in this field. Background technique [0002] With the development of science and technology and the improvement of living standards, people's requirements for color display are increasing day by day, and the display field attracts more and more eyeballs. Color display has developed rapidly in recent years, among which liquid crystal, LED, and laser display technologies have made major breakthroughs. Laser display has high color saturation (more vivid image color), large color gamut (richer image color), high intensity, high brightness (large screen can be realized), good directionality, high resolution (clearer image), etc. Therefore, it has attracted more and more attention from the industry, but there are still several technical obstacles that affect the development of laser display, and the modulation power ripple pr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/48
Inventor 马英俊韩彬薛有为柏天国
Owner SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD