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CN104333712A - Video switching circuit for navigation system - Google Patents

Video switching circuit for navigation system Download PDF

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Publication number
CN104333712A
CN104333712A CN 201410547928 CN201410547928A CN104333712A CN 104333712 A CN104333712 A CN 104333712A CN 201410547928 CN201410547928 CN 201410547928 CN 201410547928 A CN201410547928 A CN 201410547928A CN 104333712 A CN104333712 A CN 104333712A
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video
switching
circuit
chip
system
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CN 201410547928
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Chinese (zh)
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易春华
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重庆金宏汽车电子有限公司
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Abstract

The invention discloses a video switching circuit for a navigation system. The circuit comprises an output video switch chip U18, a video synchronous separation chip U61, a plurality of capacitors, a plurality of resistors, and an inductor L12. according to the video switching circuit for the navigation system, through the output video switch chip U18, the switching operation of video can be carried out through an original display screen, different angles of videos can be displayed on the display screen through the video synchronous separation chip U61 at the same time, and the video switching circuit is convenient and practical.

Description

用于导航系统的视频切换电路 Navigation systems for video switching circuit

技术领域 FIELD

[0001] 本发明涉及一种用于导航系统的视频切换电路。 [0001] The present invention relates to a navigation system for a video switching circuit.

[0002] [0002]

背景技术 Background technique

[0003] 随着汽车技术的发展,车载显示装置的使用越来越普及,驾驶员在驾驶时对车载显示装置的依赖性也越来越强。 [0003] With the development of automobile technology, in-vehicle display device using more and more popular, the driver of the vehicle display device dependence is also growing while driving. 一般而言,现有的车载显示装置对道路或者倒车的指示都是采用大屏幕的显示屏进行显示,驾驶员通过操作显示屏来完成多种操控。 In general, a conventional vehicle display device or indicating reverse path are large-screen display is displayed, manipulated by the driver to operate the display more complete. 但是,在倒车时显示屏均显示车辆正后方的影像,无法进行切换,比如切换至车辆的两侧的影像进行观察,如此较为不便。 However, when reversing the vehicle directly behind the display screen are displayed images, not switching, such as switching to the image observed on both sides of the vehicle, so it is inconvenient.

[0004] [0004]

发明内容 SUMMARY

[0005] 针对上述现有技术的不足,本发明所要解决的技术问题是:提供了一种可对视频进行切换的电路。 [0005] For the above-described deficiencies of the prior art, the present invention is to solve the technical problem are: to provide a circuit that can be switched to the video.

[0006] 为解决上述技术问题,本发明采用的一个技术方案是:提供了一种用于导航系统的视频切换电路,包括:输出视频开关芯片U18、视频同步分尚芯片U61、若干电容、若干电阻、电感L12,其中: [0006] To solve the above problems, an aspect of the present invention is that: video switching circuit is provided for a navigation system, comprising: video switch chip U18, U61 chip still video synchronization points, a plurality of capacitors, a plurality of resistors, inductors L12, wherein:

所述输出视频开关芯片U18的第一个引脚INl通过电容C24接MEPG_CVBS脚,所述输出视频开关芯片U18的第三个引脚IN2、第五个引脚IN3、第七个引脚IN4、第九个引脚IN5及第^^一个引脚IN6 分别接DTV_CVBS 脚、IP0D_CVBS 脚、CAMERA_CVBS 脚、ARM_CVBS 脚、AUX_CVBS脚;所述输出视频开关芯片U18的第十三个引脚IN7、第十五个引脚IN8、第二个引脚GND、第六个引脚GND、第十六个引脚GND、第二十四个引脚GND、第十个引脚ADDRO以及第八个引脚ADDRl均接地;所述输出视频开关芯片U18的第十四个引脚SDA与电阻R328的第一端连接,所述电阻R328的第二端接S_SDA2脚;所述输出视频开关芯片U18的第十二个引脚SCL与电阻R327的第一端连接,所述电阻R327的第二端接S_SCL2脚;所述输出视频开关芯片U18的第十七个引脚0UT6和第十八个引脚0UT5空置;所述输出视频开关芯片U18的第十九个引脚0UT4与电阻R169的第一端连接 The output of the video switch chip U18 INl connected to the first pin MEPG_CVBS pin via a capacitor C24, the output of the video switch chip U18 of the third pin IN2, IN3 fifth pin, the seventh pin IN4 of, ninth pins IN5 IN6 and second pins are respectively connected with a ^^ DTV_CVBS pin, IP0D_CVBS feet, CAMERA_CVBS feet, ARM_CVBS feet, AUX_CVBS foot; the output of the video switch chip pins IN7 U18 of the thirteenth, fifteenth pins IN8, the second pin GND, a sixth pin GND, a sixteenth pin GND, twenty-four pin GND, eighth and tenth pins ADDRO pins are ADDRl ground; a first terminal connected to the output of the video switch chip U18 fourteenth SDA pin of the resistor R328, and the resistor R328 of the second leg end S_SDA2; the output video twelfth switch chip U18 SCL pin and the resistor R327 is connected to a first terminal, a second terminal of the resistor R327 S_SCL2 leg; and the output of the video switch chip U18 seventeenth and eighteenth pin 0UT6 0UT5 vacant pins; the a first end connected to said output of the video switch chip U18 nineteenth resistor R169 and the pins 0UT4 所述电阻R169的第二端接TFT_CVBS 口,所述电阻R169的第二端还接地;所述输出视频开关芯片U18的第二i^一个引脚0UT3与电容EC15的第一端连接,所述电容EC15的第二端与电阻R54的第一端连接,所述电阻R54的第二端接VOUTl 口,所述电阻R54的第二端接地;所述输出视频开关芯片U18的第二十二个引脚0UT2与电容EC4的第一端连接,所述电容EC4的第二端与电阻R127的第一端连接,所述电阻R127的第二端接V0UT2 口,所述电阻R127的第二端还与电容C27的第一端连接,所述电容C27的第二端接地;所述输出视频开关芯片U18的第二十三个引脚OUTl与电阻R107的第一端连接,所述电阻R107的第二端与电容C352的第一端连接,所述电容C352的第一端还与电容C346的第一端连接,所述电容C352的第二端与电阻R325的第一端连接,所述电阻R325的第二端与所述电容C346的第一端连接,所述电容C346的第二端 The termination resistor R169 TFT_CVBS second port, the second end of the further resistor R169 is grounded; the second output of the video switch chip ^ i U18 is connected to a first terminal of the capacitor EC15 pin 0UT3 of the EC15 second capacitor terminal connected to a first end of the resistor R54 and the resistor R54 of the second end VOUTl port, the second terminal of resistor R54; and the twenty-second video switch chip U18 of a first end of the connection pin 0UT2 EC4 of the capacitor, a second terminal of the capacitor is connected to the EC4 first end of the resistor R127 and the resistor R127 of the second end V0UT2 port, the second terminal of resistor R127 is also a first end connected to the capacitor C27, and C27 of the second terminal of the capacitor; OUTl twenty three pins U18 and a resistor connected to the first output terminal of video switch chip of R107, R107 is the resistance of the first second end connected to a first terminal of the capacitor C352, the first end of the capacitor C352 is also connected to a first terminal of the capacitor C346 and the capacitor C352 is connected to the second end of the first end of the resistor R325, the resistor R325 the first end of the second end of the capacitor C346 is connected to the second end of the capacitor C346 所述视频同步分离芯片U61的第一引脚VIN连接;所述输出视频开关芯片U18的第四个引脚VDD与第二十个引脚VDD连接,所述输出视频开关芯片U18的第二十个引脚VDD与电容C345的第一端连接,所述电容C345的第二端接地,所述输出视频开关芯片U18的第二十个引脚VDD还与电容EC48的第一端连接,所述电容EC48的第一端还接V5V电源,所述电容EC48的第二端接地,所述输出视频开关芯片U18的第二十个引脚VDD还与电容C239的第一端连接,所述电容C239的第二端接地,所述电容C239的第一端还与电感L12的第一端连接,所述电感L12的第二端接D5V电源; The VIN pin is connected to a first video sync separator chip U61; and the output of the video switch chip U18 is connected to the fourth pin VDD VDD pin twentieth, twenty of the video output switch chip U18 a first end connected to pin VDD of the capacitor C345, the second capacitor C345 is grounded, the output of the video switch chip U18 twentieth pin VDD is also connected to a first terminal of the capacitor EC48 of the a first terminal of the capacitor is also connected V5V power EC48, EC48 is the second terminal of the capacitor, the output of the video switch chip twentieth pin VDD U18 is also connected to a first terminal of the capacitor C239 and the capacitor C239 a second end, the first end of the capacitor C239 is also connected to a first end of the L12 inductor, the second end of the inductor L12 of power D5V;

所述视频同步分离芯片U61的第二个引脚HDO空置;它的第三个引脚GND接地;它的第四个引脚PDO与电阻R445的第一端连接,所述电阻R445的第二端与电容C356的第一端连接,所述电容C356的第二端接V5V电源,所述电阻R445的第二端还与电容C355的第一端连接,所述电容C355的第二端接地,所述频同步分离芯片U61的第四个引脚PDO还与电容C354的第一端连接,所述电容C354的第二端接地,视频同步分离芯片U61的第四个引脚PDO还与电阻R442的第一端连接,所述电阻R442的第二端与电阻R441的第一端连接,所述电阻R441的第二端接地,所述电阻R441的第一端还与所述频同步分离芯片U61的第五个引脚HOSCR连接;所述频同步分离芯片U61的第六个引脚接VCCV5V电源,所述频同步分离芯片U61的第六个引脚VCC还与电容C353的第一端连接,所述电容C353的第二端接地;所述频同步分离芯片U61的第七个 The video sync separator chip U61 pin 2 HDO vacant; its third pin GND; PDO pins its fourth end connected to a first resistor R445, and R445 is the resistance of the second a first end of the connecting end of the capacitor C356, the second capacitor C356 termination V5V power, the second terminal of resistor R445 is also connected to the first terminal of the capacitor C355, the second capacitor C355 is grounded, the chip frequency sync separator U61 PDO fourth pins is also connected to the first terminal of the capacitor C354, and a second end of the capacitor C354, the video sync separator chip U61 fourth resistor R442 and further pins PDO a first end connected to the second terminal of resistor R442 is connected to a first end of the resistor R441, the resistor R441 of the second end, the first end of the resistor R441 is also synchronized with the frequency separation chip U61 fifth connecting pin HOSCR; sync separator chip U61 VCCV5V sixth pin is connected to the power supply frequency, the frequency of the sync separator chip U61 is also connected to the sixth pin VCC to the first terminal of the capacitor C353, and the second capacitor C353 is grounded; the chip frequency sync separator U61 seventh 脚VDO接CVBS_SYNC 口;所述频同步分离芯片U61的第八个引脚SYNCO与电阻R321的第一端连接,所述电阻R321的第二端接V5V电源。 VDO pin connection port CVBS_SYNC; SYNCO the frequency eighth pin connected to a first terminal of sync separator U61 is a chip of the resistor R321, the resistor R321 of the second end V5V power.

[0007] 进一步的,所述用于导航系统的视频切换电路还包括电容C18,所述电容C18连接于输出视频开关芯片U18的第三个引脚IN2与DTV_CVBS脚之间。 [0007] Further, the navigation system for video switching circuit further comprises a capacitor C18, a capacitor C18 is connected between the third output pin and IN2 pin DTV_CVBS the video switch chip U18.

[0008] 进一步的,所述用于导航系统的视频切换电路还包括电容C31,所述电容C31连接于输出视频开关芯片U18的第五个引脚IN3与IP0D_CVBS脚之间。 [0008] Further, the navigation system for video switching circuit further comprises a capacitor C31, the capacitor C31 is connected between the output of the fifth pin and IP0D_CVBS IN3 pin of the video switch chip U18.

[0009] 进一步的,所述用于导航系统的视频切换电路还包括电容C110,所述电容CllO连接于输出视频开关芯片U18的第七个引脚IN4与CAMERA_CVBS脚之间。 [0009] Further, the navigation system for video switching circuit further comprises a capacitor C110, a capacitor connected between the output CllO seventh pins IN4 and CAMERA_CVBS foot of the video switch chip U18.

[0010] 进一步的,所述用于导航系统的视频切换电路还包括电容C126,所述电容C126连接于输出视频开关芯片U18的第九个引脚IN5与ARM_CVBS脚之间。 [0010] Further, the navigation system for video switching circuit further comprises a capacitor C126, a capacitor C126 is connected between the output and the ninth pins IN5 ARM_CVBS foot of the video switch chip U18.

[0011] 进一步的,所述用于导航系统的视频切换电路还包括电容C19,所述电容C19连接于输出视频开关芯片U18的第i^一个引脚IN6与AUX_CVBS脚之间。 [0011] Further, the navigation system for video switching circuit further comprises a pin between the first i ^ IN6 and video AUX_CVBS foot switch chip U18 of capacitors C19, C19 connected to the output of the capacitor.

[0012] 本发明中,所述视频切换电路通过输出视频开关芯片U18即可通过原有的显示屏进行视频的切换动作,同时通过视频同步分离芯片U61还可在显示屏上同时显示不同角度的视频,较为方便实用。 [0012] In the present invention, the switch circuit can be carried out by the video output of the video switch chip U18 via the display switching operation of the original video, while the video sync separator chip U61 different angles may also be displayed simultaneously on the display screen video, more convenient and practical.

[0013] [0013]

附图说明 BRIEF DESCRIPTION

[0014] 为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。 [0014] In order to more clearly illustrate the technical solutions in the embodiments or the prior art embodiment of the present invention, briefly introduced hereinafter, embodiments are described below in the accompanying drawings or described in the prior art needed to be used in describing the embodiments the drawings are only some embodiments of the present invention, those of ordinary skill in the art is concerned, without creative efforts, can derive from these drawings other drawings.

[0015] 图1是本发明用于导航系统的视频切换电路较佳实施例的电路原理图。 [0015] FIG. 1 is a video navigation system according to the present invention for switching a circuit schematic circuit diagram of the preferred embodiment.

[0016] [0016]

具体实施方式 detailed description

[0017] 下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。 [0017] below in conjunction with the present invention in the accompanying drawings, technical solutions of embodiments of the present invention are clearly and completely described, obviously, the described embodiments are merely part of embodiments of the present invention, but not all embodiments example. 基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。 Based on the embodiments of the present invention, all other embodiments of ordinary skill in the art without any creative effort shall fall within the scope of the present invention.

[0018] 首先,在对实施例进行描述之前,有必要对本文中出现的一些术语进行解释。 [0018] First, before the description of embodiments, it is necessary for some of the terms appearing herein will be explained. 例如: E.g:

本文中若出现使用“第一”、“第二”等术语来描述各种元件,但是这些元件不应当由这些术语所限制。 If there is used herein, "first," "second," and the like terms to describe various elements, these elements should not be limited by these terms. 这些术语仅用来区分一个元件和另一个元件。 These terms are only used to distinguish one element from another. 因此,“第一”元件也可以被称为“第二”元件而不偏离本发明的教导。 Thus, "a first" element may also be referred to as a "second" component without departing from the teachings of the present invention.

[0019] 另外,应当理解的是,当提及一元件“连接”或者“联接”到另一元件时,其可以直接地连接或直接地联接到另一元件或者也可以存在中间元件。 [0019] Further, it should be understood that, when referring to an element is "connected" or "coupled" to another element, it can be directly connected to or directly coupled to the other element or intervening elements may also be present. 相反地,当提及一元件“直接地连接”或“直接地联接”到另一元件时,则不存在中间元件。 In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, no intervening elements present.

[0020] 在本文中出现的各种术语仅仅用于描述具体的实施方式的目的而无意作为对本发明的限定。 [0020] The various terms appearing herein is for the purpose of describing particular embodiments and are not intended to limit the present invention. 除非上下文另外清楚地指出,则单数形式意图也包括复数形式。 Unless the context clearly indicates otherwise, the singular forms are intended to include the plural forms.

[0021] 当在本说明书中使用术语“包括”和/或“包括有”时,这些术语指明了所述特征、整体、步骤、操作、元件和/或部件的存在,但是也不排除一个以上其他特征、整体、步骤、操作、元件、部件和/或其群组的存在和/或附加。 [0021] When used in this specification, the terms "comprises" and / or "including", these terms indicate the stated features, integers, steps, operations, elements, and / or components, but do not preclude a more other features, integers, steps, operations, elements, components, and / or groups and / or additions.

[0022] 关于实施例: [0022] For Example:

请参见图1,图1是本发明用于导航系统的视频切换电路较佳实施例的电路原理图。 Referring to FIG. 1, FIG. 1 of the present invention is a video navigation system for switching a circuit schematic circuit diagram of the preferred embodiment. 本实施例的用于导航系统的视频切换电路包括:输出视频开关芯片U18、视频同步分离芯片U61、若干电容、若干电阻、电感L12。 Navigation systems for video switching circuit of this embodiment comprises: an output video switch chip U18, U61 video sync separator chip, a plurality of capacitors, a plurality of resistors, inductors L12. 其中: among them:

所述输出视频开关芯片U18包括二十四个引脚,其第一个引脚INl与电容C24的第一端连接,所述电容C24的第二端接MEPG_CVBS脚,所述电容C24的第二端还接地; The output of the video switch chip U18 includes twenty four pins, which is connected to a first end of a first pin INl and capacitor C24, and a second end of the capacitor C24 MEPG_CVBS leg, the second capacitor C24 end further ground;

所述输出视频开关芯片U18的第三个引脚IN2与电容C18的第一端连接,所述电容C18的第二端接DTV_CVBS脚,所述电容C18的第二端还接地; The video output of the third switch chip U18 IN2 pin with a first end of capacitor C18 is connected to a second terminal of the capacitor C18 DTV_CVBS leg, a second terminal of the capacitor C18 is also grounded;

所述输出视频开关芯片U18的第五个引脚IN3与电容C31的第一端连接,所述电容C31的第二端接IP0D_CVBS脚,所述电容C31的第二端还接地; The video output of the fifth switch chip U18 IN3 pin of the capacitor C31 is connected to a first terminal, a second terminal of the capacitor C31 IP0D_CVBS leg, a second terminal of the capacitor C31 is also grounded;

所述输出视频开关芯片U18的第七个引脚IN4与电容CllO的第一端连接,所述电容CllO的第二端接CAMERA_CVBS脚所述电容CllO的第二端还接地; The output of the video switch chip U18 seventh pins of the capacitor CllO IN4 first end connected a second end of the capacitor to ground further CllO second terminal of said capacitor leg CAMERA_CVBS of CllO;

所述输出视频开关芯片U18的第九个引脚IN5与电容C26的第一端连接,所述电容C26的第二端接ARM_CVBS脚,所述电容C26的第二端还接地; The output of the video switch chip U18 IN5 ninth pins of the capacitor C26 is connected to a first terminal, a second terminal of the capacitor C26 ARM_CVBS leg, a second terminal of the capacitor C26 is also grounded;

所述输出视频开关芯片U18的第i^一个引脚IN6与电容C19的第一端连接,所述电容C19的第二端接AUX_CVBS脚,所述电容C19的第二端还接地; The video output of the first switch chip U18 IN6 i ^ a pin connected to the first terminal of the capacitor C19, a second terminal of the capacitor C19 AUX_CVBS pin, the second end of the capacitor C19 is also grounded;

所述输出视频开关芯片U18的第十三个引脚IN7、第十五个引脚IN8、第二个引脚GND、第六个引脚GND、第十六个引脚GND、第二十四个引脚GND、第十个引脚ADDRO以及第八个引脚ADDRl均接地; The output of the video switch chip pins IN7 U18 of the thirteenth, fifteenth IN8 pin, the GND pin the second, sixth the GND pin, the GND pin sixteenth, twenty-fourth pin GND, eighth and tenth pins ADDRO ADDRl pins are grounded;

所述输出视频开关芯片U18的第十四个引脚SDA与电阻R328的第一端连接,所述电阻R328的第二端接S_SDA2脚; The output of the video switch chip fourteenth pin SDA U18 first end connected with a resistor R328 and the resistor R328 of the second leg end S_SDA2;

所述输出视频开关芯片U18的第十二个引脚SCL与电阻R327的第一端连接,所述电阻R327的第二端接S_SCL2脚; The output of the video switch chip U18 and SCL pins of a twelfth resistor R327 is connected to a first terminal, a second terminal of the resistor R327 of S_SCL2 leg;

所述输出视频开关芯片U18的第十七个引脚0UT6和第十八个引脚0UT5空置; The output of the video switch chip pins 0UT6 U18 seventeenth and eighteenth pin 0UT5 vacant;

所述输出视频开关芯片U18的第十九个引脚0UT4与电阻R169的第一端连接,所述电阻R169的第二端接TFT_CVBS 口,所述电阻R169的第二端还与电容C159的第一端连接,所述电容C159的第二端接地; The output of the video switch chip pins 0UT4 nineteenth resistor R169 is connected to a first end of U18, the first port of the second terminal TFT_CVBS resistor R169, and a second end of the resistor R169 and the capacitor C159 is also one end connected to a second terminal of the capacitor C159;

所述输出视频开关芯片U18的第二i^一个引脚0UT3与电容EC15的第一端连接,所述电容EC15的第二端与电阻R54的第一端连接,所述电阻R54的第二端接VOUTl 口,所述电阻R54的第二端与电容C25的第一端连接,所述电容C25的第二端接地; The second output of the video switch chip ^ i U18 is connected to a first terminal of the capacitor pin 0UT3 of EC15, EC15 second end of the capacitor connected to the first end of the resistor R54 and the resistor R54 of the second end VOUTl connection port, a second terminal of the resistor R54 is connected to the first terminal of the capacitor C25 of the second capacitor C25 is grounded;

所述输出视频开关芯片U18的第二十二个引脚0UT2与电容EC4的第一端连接,所述电容EC4的第二端与电阻R127的第一端连接,所述电阻R127的第二端接V0UT2 口,所述电阻R127的第二端还与电容C27的第一端连接,所述电容C27的第二端接地; Twenty-two of the output pin and the first terminal of the capacitor EC4 0UT2 of the switch U18 is connected to the video chip, a second terminal of the capacitor is connected to the EC4 first end of the resistor R127, and R127 is the resistance of the second end V0UT2 connection port, the second terminal of resistor R127 is also connected to a first terminal of the capacitor C27 of the second capacitor C27 is grounded;

所述输出视频开关芯片U18的第二十三个引脚OUTl与电阻R107的第一端连接,所述电阻R107的第二端与电容C352的第一端连接,所述电容C352的第一端还与电容C346的第一端连接,所述电容C352的第二端与电阻R325的第一端连接,所述电阻R325的第二端与所述电容C346的第一端连接,所述电容C346的第二端与所述视频同步分离芯片U61的第一引脚VIN连接; The output of the video switch chip OUTl twenty three pins U18 and resistor R107 is connected to a first end, a second end of the resistor R107 is connected to a first terminal of the capacitor C352, the first end of the capacitor C352 further a first end connected to the capacitor C346, and a second terminal of the capacitor C352 is connected to the first end of resistor R325, the resistor R325 is connected to the second end of the first end of the capacitor C346 and the capacitor C346 a second end of the first video sync separator chip U61 VIN pin is connected;

所述输出视频开关芯片U18的第四个引脚VDD与第二十个引脚VDD连接,所述输出视频开关芯片U18的第二十个弓I脚VDD与电容C345的第一端连接,所述电容C345的第二端接地,所述输出视频开关芯片U18的第二十个引脚VDD还与电容EC48的第一端连接,所述电容EC48的第一端还接V5V电源,所述电容EC48的第二端接地,所述输出视频开关芯片U18的第二十个引脚VDD还与电容C239的第一端连接,所述电容C239的第二端接地,所述电容C239的第一端还与电感L12的第一端连接,所述电感L12的第二端接D5V电源。 A first terminal connected to the output of the video switch chip U18 fourth pin VDD is connected to a twentieth pin VDD, the output of the video switch chip U18 bow I twentieth pin VDD of the capacitor C345, the said second terminal of the capacitor C345, the output of the video switch chip twentieth pin VDD U18 is also connected to a first terminal of the capacitor of the EC48, EC48 first end of the capacitor is also connected V5V power supply, the capacitor EC48 second end, said second video switch chip ten pin VDD U18 is also connected to a first terminal of the capacitor C239, and C239 is the capacitance of the second end, the first end of the capacitor C239 L12 is further connected to a first terminal of the inductor, the second end of the inductor L12 of power D5V.

[0023] 所述视频同步分离芯片U61包括8个引脚,它的第二个引脚HDO空置;它的第三个引脚GND接地;它的第四个引脚TOO与电阻R445的第一端连接,所述电阻R445的第二端与电容C356的第一端连接,所述电容C356的第二端接V5V电源,所述电阻R445的第二端还与电容C355的第一端连接,所述电容C355的第二端接地,所述视频同步分离芯片U61的第四个引脚PDO还与电容C354的第一端连接,所述电容C354的第二端接地,视频同步分离芯片U61的第四个引脚PDO还与电阻R442的第一端连接,所述电阻R442的第二端与电阻R441的第一端连接,所述电阻R441的第二端接地,所述电阻R441的第一端还与所述视频同步分离芯片U61的第五个引脚HOSCR连接; [0023] The video sync separator chip U61 includes eight pins, its second pin HDO vacant; its third pin GND; its fourth pins of the first and the resistor R445 of TOO terminal connected to a second terminal of resistor R445 is connected to a first terminal of the capacitor C356, the second capacitor C356 termination V5V power, the second terminal of resistor R445 is also connected to a first terminal of the capacitor C355, and a second end of the capacitor C355, the video sync separator chip U61 PDO fourth pins is also connected to the first terminal of the capacitor C354, the second capacitor C354 is grounded, the video sync separator chip U61 PDO is also connected to the fourth pin and the first end of resistor R442, the resistor R442 is connected to a first end of the second end of the resistor R441, the first end of the second resistor R441, the resistor R441 is sync separator U61 also end chip HOSCR fifth pin connected with the video;

所述视频同步分离芯片U61的第六个引脚接VCCV5V电源,所述视频同步分离芯片U61的第六个引脚VCC还与电容C353的第一端连接,所述电容C353的第二端接地; The video sync separator chip U61 VCCV5V sixth pins connected to the power supply, the video sync separator chip U61 is also connected to the sixth pin VCC to the first terminal of the capacitor C353, and C353 to the second terminal of the capacitor ;

所述视频同步分离芯片U61的第七个引脚VDO接CVBS_SYNC 口; The video sync separator chip U61 is connected to the seventh pin VDO CVBS_SYNC port;

所述视频同步分离芯片U61的第八个引脚SYNCO与电阻R321的第一端连接,所述电阻R321的第二端接V5V电源。 The video sync separator SYNCO eighth pin connected to a first end of the resistor R321 chip U61, the second end of the resistor R321 is V5V power.

[0024]本发明中,各路视频信号从 MEPG_CVBS 脚、DTV_CVBS 脚、IP0D_CVBS 脚、CAMERA_CVBS脚、ARM_CVBS脚及AUX_CVBS脚输入至输出视频开关芯片U18。 [0024] In the present invention, each channel of video signals from MEPG_CVBS pin, DTV_CVBS feet, IP0D_CVBS feet, CAMERA_CVBS feet, ARM_CVBS AUX_CVBS legs and feet to the input of the video switch chip U18. 在接受用户指令之后输出总线信号至S_SCL2脚及S_SDA2脚,并通过输出视频开关芯片U18的第二十三脚OUTl输出至视频同步分离芯片U61,进行视频信号处理之后在显示屏进行显示。 After the signal to the output bus S_SCL2 legs and feet S_SDA2 after receiving a user instruction, and outputs an output of the video switch chip U18 to twenty tripod OUTl video sync separator chip U61, a video signal processing for display on the display screen.

[0025] 本发明中,所述视频切换电路通过输出视频开关芯片U18即可通过原有的显示屏进行视频的切换动作,同时通过视频同步分离芯片U61还可在显示屏上同时显示不同角度的视频,较为方便实用。 [0025] In the present invention, the switch circuit can be carried out by the video output of the video switch chip U18 via the display switching operation of the original video, while the video sync separator chip U61 different angles may also be displayed simultaneously on the display screen video, more convenient and practical.

[0026] 以上仅为本发明的实施方式,并非因此限制本发明的专利范围,凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。 [0026] The above are only embodiments of the present invention, not intended to limit the scope of the present invention, all of the specification and drawings of the present invention provided equivalent structures or equivalent process, directly or indirectly use or other relevant BACKGROUND shall also fall within the scope of protection of the present invention.

Claims (6)

  1. 1.一种用于导航系统的视频切换电路,其特征在于:所述用于导航系统的视频切换电路包括:输出视频开关芯片U18、视频同步分离芯片U61、若干电容、若干电阻、电感L12,其中: 所述输出视频开关芯片U18的第一个引脚INl通过电容C24连接MEPG_CVBS脚,所述输出视频开关芯片U18的第三个引脚IN2、第五个引脚IN3、第七个引脚IN4、第九个引脚IN5及第i^一个引脚IN6 分别接、DTV_CVBS 脚、IPOD_CVBS 脚、CAMERA_CVBS 脚、ARM_CVBS 脚、AUX_CVBS脚;所述输出视频开关芯片U18的第十三个引脚IN7、第十五个引脚IN8、第二个引脚GND、第六个引脚GND、第十六个引脚GND、第二十四个引脚GND、第十个引脚ADDRO以及第八个引脚ADDRl均接地;所述输出视频开关芯片U18的第十四个引脚SDA与电阻R328的第一端连接,所述电阻R328的第二端接S_SDA2脚;所述输出视频开关芯片U18的第十二个引脚SCL与电阻R327的第一端 CLAIMS 1. A navigation system for video switching circuit, wherein: the navigation system for a video switching circuit comprising: a video switch chip U18, U61 video sync separator chip, a plurality of capacitors, a plurality of resistors, inductors L12, wherein: said video switch chip U18 INl connected to the first pin MEPG_CVBS pin via a capacitor C24, the output of the video switch chip U18 of the third pin IN2, IN3 fifth pin, the seventh pin IN4 of, ninth and second pins IN5 IN6 i ^ respectively connected to a pin, DTV_CVBS pin, IPOD_CVBS feet, CAMERA_CVBS feet, ARM_CVBS feet, AUX_CVBS foot; the output of the video switch chip in a thirteenth pin IN7 U18, a fifteenth pin IN8, the second pin GND, a sixth pin GND, a sixteenth pin GND, twenty-four pin GND, eighth and tenth pins ADDRO primers ADDRl pin grounded; the output pins SDA and fourteenth resistor R328 video switch chip U18 is connected to a first end, a second end of the resistor R328 S_SDA2 pin; said first output of the video switch chip U18 twelve SCL pin first end of the resistor R327 of 连接,所述电阻R327的第二端接S_SCL2脚;所述输出视频开关芯片U18的第十七个引脚OUT6和第十八个引脚OUT5空置;所述输出视频开关芯片U18的第十九个引脚0UT4与电阻R169的第一端连接,所述电阻R169的第二端接TFT_CVBS 口,所述电阻R169的第二端还接地;所述输出视频开关芯片U18的第二十一个引脚OUT3与电容EC15的第一端连接,所述电容EC15的第二端与电阻R54的第一端连接,所述电阻R54的第二端接VOUTl 口,所述电阻R54的第二端接地;所述输出视频开关芯片U18的第二十二个引脚0UT2与电容EC4的第一端连接,所述电容EC4的第二端与电阻R127的第一端连接,所述电阻R127的第二端接V0UT2 口,所述电阻R127的第二端还与电容C27的第一端连接,所述电容C27的第二端接地;所述输出视频开关芯片U18的第二十三个引脚OUTl与电阻R107的第一端连接,所述电阻R107的第二端与电容C352的第一 Connected to a second terminal of resistor R327 S_SCL2 leg; and the output of the video switch chip U18 of the seventeenth and eighteenth pin OUT6 OUT5 vacant pins; the output of the video switch chip U18 nineteenth connecting a first end of the resistor R169 0UT4 pin, the second end of the resistor R169 TFT_CVBS port, and a second end of the resistor R169 is also grounded; the output of the video switch chip U18 of twenty one primer a first terminal connected to the capacitor pin OUT3 of EC15, EC15 second end of the capacitor connected to the first end of the resistor R54 and the resistor R54 of the second end VOUTl port, the second terminal of resistor R54 is; twenty-two of the output pin and the first terminal of the capacitor EC4 0UT2 of the switch U18 is connected to the video chip, a second terminal of the capacitor is connected to the EC4 first end of the resistor R127, and R127 is the resistance of the second end V0UT2 connection port, the second terminal of resistor R127 is also connected to a first terminal of the capacitor C27, the capacitor C27 of the second terminal is grounded; twenty three pins OUTl and the resistance of the output of the video switch chip U18 R107 is connected to a first end, a second end of the first resistor R107 and the capacitor C352 连接,所述电容C352的第一端还与电容C346的第一端连接,所述电容C352的第二端与电阻R325的第一端连接,所述电阻R325的第二端与所述电容C346的第一端连接,所述电容C346的第二端与所述视频同步分离芯片U61的第一引脚VIN连接;所述输出视频开关芯片U18的第四个引脚VDD与第二十个引脚VDD连接,所述输出视频开关芯片U18的第二十个引脚VDD与电容C345的第一端连接,所述电容C345的第二端接地,所述输出视频开关芯片U18的第二十个引脚VDD还与电容EC48的第一端连接,所述电容EC48的第一端还接V5V电源,所述电容EC48的第二端接地,所述输出视频开关芯片U18的第二十个引脚VDD还与电容C239的第一端连接,所述电容C239的第二端接地,所述电容C239的第一端还与电感L12的第一端连接,所述电感L12的第二端接D5V电源; 所述视频同步分离芯片U61的第二个引脚HDO空置;它的第 Connected to a first terminal of the capacitor C352 is also connected to a first terminal of the capacitor C346 and the capacitor C352 is connected to the second end of the first end of the resistor R325, the resistor R325 and a second terminal of the capacitor C346 connecting a first end, a second end of the first VIN pin is connected to the video sync separator chip U61 of the capacitor C346; said fourth output video switch chip pins and VDD U18 primer twentieth VDD pin connected to a first output terminal connected to a second video switch chip ten pin VDD of the capacitor C345 of U18, a second end of the capacitor C345, the output of the video switch chip U18 is a twentieth pin VDD is also connected to a first terminal of the capacitor of the EC48, EC48 first end of the capacitor is also connected V5V power source, the second terminal of the capacitor EC48, the video output switch chip U18 is a twentieth pin VDD is also connected to a first terminal of the capacitor C239, and C239 is the capacitance of the second end, the first end of the capacitor C239 is also connected to a first end of the inductor L12, the second end of the inductor L12 of power D5V ; said video sync separator chip U61 pin 2 HDO vacant; its first 个引脚GND接地;它的第四个引脚PDO与电阻R445的第一端连接,所述电阻R445的第二端与电容C356的第一端连接,所述电容C356的第二端接V5V电源,所述电阻R445的第二端还与电容C355的第一端连接,所述电容C355的第二端接地,所述频同步分离芯片U61的第四个引脚PDO还与电容C354的第一端连接,所述电容C354的第二端接地,视频同步分离芯片U61的第四个引脚PDO还与电阻R442的第一端连接,所述电阻R442的第二端与电阻R441的第一端连接,所述电阻R441的第二端接地,所述电阻R441的第一端还与所述视频同步分离芯片U61的第五个引脚HOSCR连接;所述视频同步分离芯片U61的第六个引脚接VCCV5V电源,所述视频同步分离芯片U61的第六个引脚VCC还与电容C353的第一端连接,所述电容C353的第二端接地;所述视频同步分离芯片U61的第七个引脚VDO接CVBS_SYNC 口;所述视频同步分离芯片U61 A pin GND; PDO its fourth pins and the first terminal of the resistor R445, and R445 is the resistance of the second end of the capacitor C356 is connected to the first terminal, said second terminal of the capacitor C356 V5V power source, the second terminal of resistor R445 is also connected to a first terminal of the capacitor C355, and C355 is the capacitance of the second end, the first and further capacitor C354 chip frequency sync separator U61 fourth pins PDO one end connected to a second terminal of the capacitor C354, a video sync separator chip U61 PDO fourth pins is also connected to the first end of the resistor R442, and R442 is the resistance of the second end of the resistor R441 of the first terminal connected to a second terminal of the resistor R441, a first end of the resistor R441 and further to the video sync separator chip U61 HOSCR fifth pin; said video sync separator chip U61 sixth VCCV5V power supply pin is connected to the video sync separator chip U61 is also connected to the sixth pin VCC to the first terminal of the capacitor C353, and C353 to the second terminal of the capacitor; said video sync separator chip U61 VII VDO contact pins CVBS_SYNC port; said video sync separator chip U61 第八个引脚SYNCO与电阻R321的第一端连接,所述电阻R321的第二端接V5V电源。 A first end connected to the eighth pin SYNCO resistor R321 and the resistor R321 of the second end V5V power.
  2. 2.如权利要求1所述的用于导航系统的视频切换电路,其特征在于:所述用于导航系统的视频切换电路还包括电容C18,所述电容C18连接于输出视频开关芯片U18的第三个弓I脚IN2与DTV_CVBS脚之间。 2. The video switching circuitry used in the navigation system according to claim 1, wherein: the navigation system for video switching circuit further includes a capacitor C18, a capacitor C18 is connected to the first output of the video switch chip U18 I bow three feet between IN2 and DTV_CVBS feet.
  3. 3.如权利要求1所述的用于导航系统的视频切换电路,其特征在于:所述用于导航系统的视频切换电路还包括电容C31,所述电容C31连接于输出视频开关芯片U18的第五个弓I脚IN3与IP0D_CVBS脚之间。 A video switching circuit for a navigation system according to claim 1, wherein: the navigation system for video switching circuit further includes a capacitor C31, a capacitor C31 is connected to the first output of the video switch chip U18 I bow between five feet IN3 and IP0D_CVBS feet.
  4. 4.如权利要求1所述的用于导航系统的视频切换电路,其特征在于:所述用于导航系统的视频切换电路还包括电容C110,所述电容CllO连接于输出视频开关芯片U18的第七个引脚IN4与CAMERA_CVBS脚之间。 A video switching circuit for a navigation system according to claim 1, wherein: the navigation system for video switching circuit further comprises a capacitor C110, a capacitor connected to the first CllO output of the video switch chip U18 IN4 pin between seven and CAMERA_CVBS feet.
  5. 5.如权利要求1所述的用于导航系统的视频切换电路,其特征在于:所述用于导航系统的视频切换电路还包括电容C126,所述电容C126连接于输出视频开关芯片U18的第九个引脚IN5与ARM_CVBS脚之间。 5. The video navigation system for the switching circuit of claim 1, wherein: the video navigation system for the switching circuit further comprises a capacitor C126, a capacitor C126 is connected to the first output of the video switch chip U18 IN5 between nine pins and ARM_CVBS feet.
  6. 6.如权利要求1所述的用于导航系统的视频切换电路,其特征在于:所述用于导航系统的视频切换电路还包括电容C19,所述电容C19连接于输出视频开关芯片U18的第i^一个引脚IN6与AUX_CVBS脚之间。 6. The video navigation system for the switch circuit of claim 1, wherein: said switching circuit for video navigation system further includes a capacitor C19, a capacitor C19 is connected to the first output of the video switch chip U18 i ^ between a pin IN6 and AUX_CVBS feet.
CN 201410547928 2014-10-16 2014-10-16 Video switching circuit for navigation system CN104333712A (en)

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