CN104869345B

CN104869345B - Collector based on LVDS signal

Info

Publication number: CN104869345B
Application number: CN201510256756.7A
Authority: CN
Inventors: 罗益峰; 张飞; 潘浩; 吴小瑶
Original assignee: Guangzhou Lango Electronic Science and Technology Co Ltd
Current assignee: Guangzhou Lango Electronic Science and Technology Co Ltd
Priority date: 2015-05-18
Filing date: 2015-05-18
Publication date: 2018-12-11
Anticipated expiration: 2035-05-18
Also published as: CN104869345A

Abstract

The present invention provides a kind of collector based on LVDS signal, comprising: clock stable module, HDMI conversion module and MCU module；The MCU module is separately connected clock stable module, HDMI conversion module, and the HDMI conversion module connects HDMI capture card；The clock stable module controls the synchronism of LVDS signal for the LVDS signal of input to be converted to stable clock signal according to the clock output frequency of setting；The HDMI conversion module for the LVDS signal that clock stable module exports to be converted into HDMI signal according to LVDS conversion and mixed algorithm, and exports to HDMI capture card and is reduced to image；The MCU module converts the LVDS signal of input for controlling clock stable module, and LVDS signal is converted to HDMI signal by control HDMI conversion module.Technology of the invention, by the way that LVDS signal is converted into HDMI signal, then HDMI capture card is acquired, and reduces LVDS signal acquisition cost.

Description

Collector based on LVDS signal

Technical field

The present invention relates to image technique fields, more particularly to a kind of collector based on LVDS signal.

Background technique

In traditional industrial production, the detection of product is detected generally by artificial eye, testing result It is inaccurate because of the influence of subjective factor, and detection efficiency is very low, it, also can be to the view of worker along with prolonged work Power damages, and therefore, passes through acquisition image and is handled image and analyzed to carry out detection to product and be developing progressively For a kind of trend.

When judging whether vision signal is normal, whether the LVDS signal issued often through test video chip normally comes The whether normal of video chip judged, at this time just needs to acquire LVDS signal, and be reduced into image to be analyzed.

In the prior art, LVDS signal is directly usually acquired using LVDS capture card, but due to LVDS capture card Price is more expensive, and high cost makes acquisition cost higher, and affects the use of LVDS technology.

Summary of the invention

Based on this, it is necessary to for above-mentioned problem at high cost, provide a kind of collector based on LVDS signal.

A kind of collector based on LVDS signal, comprising: clock stable module, HDMI conversion module and MCU module；

The MCU module is separately connected clock stable module, HDMI conversion module, and the HDMI conversion module connects HDMI Capture card；

The clock stable module, for the LVDS signal of input to be converted to stabilization according to the clock output frequency of setting Clock signal, control LVDS signal synchronism；

The HDMI conversion module, the LVDS for being exported clock stable module according to LVDS conversion and mixed algorithm Signal is converted into HDMI signal, and exports to HDMI capture card and be reduced to image；

The MCU module converts the LVDS signal of input for controlling clock stable module, and control HDMI conversion LVDS signal is converted to HDMI signal by module.

The above-mentioned collector based on LVDS signal is constructed by clock stable module, HDMI conversion module and MCU module At LVDS signal is converted into HDMI signal by MCU module control clock stable module, HDMI conversion module, is transferred to HDMI It is converted into image in capture card, is acquired without using LVDS capture card, can be realized pair using HDMI capture card at low cost The collection process of LVDS signal reduces LVDS signal acquisition cost.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the collector based on LVDS signal of one embodiment；

Fig. 2 is the structural schematic diagram of the collector based on LVDS signal of another embodiment

Fig. 3 is the structural schematic diagram of the HDMI conversion module of one embodiment；

Fig. 4 is the structural schematic diagram of the HDMI conversion chip of one embodiment.

Specific embodiment

The specific embodiment of the collector of the invention based on LVDS signal is described in detail with reference to the accompanying drawing.

The some initialisms occurred in text are explained as follows:

LVDS:Low-Voltage Differential Signaling, low-voltage differential signal；

HDMI:High Definition Multimedia Interface, high-definition multimedia interface；

HDCP:High-bandwidth Digital Content Protection, high-bandwidth digital content protection skill Art；

ESD:Electro-Static Discharge, Electro-static Driven Comb；

MCU:Microcontroller Unit, micro-control unit.

As shown in FIG. 1, FIG. 1 is the structural schematic diagrams of the collector based on LVDS signal of one embodiment, comprising:

Clock stable module 10 is converted to the LVDS signal of input for the clock output frequency according to setting stable Clock signal controls the synchronism of LVDS signal.

HDMI conversion module 20, the LVDS for being exported clock stable module according to LVDS conversion and mixed algorithm believe It number is converted into HDMI signal, and exports to HDMI capture card and is reduced to image.

MCU module 30 converts the LVDS signal of input for controlling clock stable module, and control HDMI modulus of conversion LVDS signal is converted to HDMI signal by block.

The above-mentioned collector based on LVDS signal, under the control of MCU module 30, clock stable module 10 is capable of providing surely Fixed clock signal, and then the synchronism of signal is controlled, stable LVDS signal is exported to HDMI conversion module 20；HDMI conversion The stable LVDS signal that module 20 again exports clock stable module is converted to HDMI signal, in this way, HDMI signal By being reduced to image based on the HDMI capture card on PC (personal computer), thus reduce the acquisition to LVDS signal at This.

In one embodiment, refering to what is shown in Fig. 2, Fig. 2 is the knot of the collector based on LVDS signal of another embodiment Structure schematic diagram, the collector can also include the electrostatic protection module 40 before clock stable module, can be used for eliminating defeated The electrostatic that the LVDS signal entered generates；Preferably, the electrostatic protection module 40 can eliminate LVDS by using ESD device The electrostatic that differential signal generates.

The scheme of above-described embodiment, electrostatic protection module 40 are prevented above 10 groups of differential signals of LVDS using ESD device Electrostatic is generated, more stable LVDS signal can be obtained.

For MCU module 30, main function is controlled clock stable module 10, HDMI conversion module 20, one In a embodiment, it is contemplated that the image of LVDS signal may generate rotation (such as image rotates integrally 180 °), and MCU module 30 is also It can be used for judging whether the image of LVDS signal generates rotation, when image generates rotation, control clock stable module 20 is adjusted Rotation processing is carried out to LVDS signal with the image rotation algorithm prestored.

The scheme of above-described embodiment controls clock stable module 20 by MCU module 30 and carries out at rotation to LVDS signal Reason, it is ensured that acquired image can be shown by normal direction.

In one embodiment, refering to what is shown in Fig. 3, Fig. 3 is the structural schematic diagram of the HDMI conversion module of one embodiment, HDMI conversion module 20 includes: main control chip 210 and HDMI conversion chip 220.

The main control chip 210, for LVDS conversion and mixed algorithm to be cured in HDMI conversion chip, by pre- The program deposited be passed to HDMI conversion chip described in corresponding state modulator by LVDS signal be converted into the signal of HDMI format；Institute HDMI conversion chip 220 is stated, is believed for LVDS signal progress the LVDS decoding, video signal collection to input, and with audio It number carries out being mixed into HDMI signal.

In one embodiment, refering to what is shown in Fig. 4, Fig. 4 is the structural schematic diagram of the HDMI conversion chip of one embodiment, The HDMI conversion chip 220 includes:

Decoder 2201, for being decoded and going spread-spectrum processing to the LVDS signal of input；

Video frequency collection card 2203, for acquiring the LVDS vision signal for passing through decoder output；

Audio collection card 2205, for acquiring audio signal；

Signal synthesizer 2207, for LVDS vision signal and the audio signal to be carried out synthesis video/audio；Into One step, signal synthesizer 2207 can be also used for carrying out HDCP encryption to the video/audio；

Signal adapter 2209 for video/audio to be carried out pixel data coding, and is converted into serial HDMI letter Number output.

Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.

The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims

1. a kind of collector based on LVDS signal characterized by comprising clock stable module, HDMI conversion module and MCU Module；

The MCU module is separately connected clock stable module, HDMI conversion module, the HDMI conversion module connection HDMI acquisition Card；

The clock stable module, when for the LVDS signal of input to be converted to stable according to the clock output frequency of setting Clock signal controls the synchronism of LVDS signal, exports stable LVDS signal to HDMI conversion module；

The HDMI conversion module, the LVDS signal for being exported clock stable module according to LVDS conversion and mixed algorithm It is converted into HDMI signal, and exports to HDMI capture card and is reduced to image；

The MCU module converts the LVDS signal of input for controlling clock stable module, and control HDMI conversion module LVDS signal is converted into HDMI signal；The MCU module is also used to control the clock stable module and carries out to LVDS signal Rotation processing, when image generates rotation, controls the clock specifically for judging whether the image of LVDS signal generates rotation Stable module calls the image rotation algorithm prestored to carry out rotation processing to LVDS signal；

Further include:

Electrostatic protection module before the clock stable module, the electrostatic that the LVDS signal for eliminating input generates.

2. the collector according to claim 1 based on LVDS signal, which is characterized in that the electrostatic protection module passes through The electrostatic of LVDS differential signal generation is eliminated using ESD device.

3. the collector according to claim 1 based on LVDS signal, which is characterized in that the HDMI conversion module packet It includes: main control chip and HDMI conversion chip；

The main control chip passes through the journey prestored for LVDS conversion and mixed algorithm to be cured in HDMI conversion chip Sequence is passed to the signal that the LVDS signal of input is converted into HDMI format by HDMI conversion chip described in corresponding state modulator；

HDMI conversion chip, for carrying out LVDS decoding, video signal collection, and and audio signal to the LVDS signal of input It carries out being mixed into HDMI signal.

4. the collector according to claim 3 based on LVDS signal, which is characterized in that the HDMI conversion chip packet It includes:

Decoder, for being decoded and going spread-spectrum processing to the LVDS signal of input；

Video frequency collection card, for acquiring the LVDS vision signal by decoder output；

Audio collection card, for acquiring audio signal；

Signal synthesizer, for the LVDS vision signal and the audio signal to be carried out synthesis video/audio；

Signal adapter, for the video/audio to be carried out code pixel data, and it is defeated to be converted into serial HDMI signal Out.

5. the collector according to claim 4 based on LVDS signal, which is characterized in that the signal synthesizer is also used to HDCP encryption is carried out to the video/audio.