Control box with built-in image signal distribution circuit

Abstract

The utility model relates to the technical field of video distributor control boxes, and discloses a control box with a built-in image signal distribution circuit, which comprises a control box, a camera interface, a video interface and a display screen interface are sequentially arranged outside the control box, and a video distribution module, a power supply module and a protection module are sequentially arranged inside the control box. Wherein the video distribution module comprises three groups of high-speed video buffers and video amplifiers and is used for avoiding image distortion, an AHD image signal is output to a video distributor control box through a camera, the control box outputs two paths of AHD signals, one path of AHD signal is output to a display screen, and the other path of AHD signal is output to a DVR product; and three groups of high-speed video buffers and video amplifiers are arranged, so that the problem of image distortion caused by signal attenuation is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of video distributor control boxes, and relates to a control box with an embedded image signal distribution circuit. BACKGROUND

[0002] In the process of realizing the application, the inventor finds that at least the following problems exist in the prior art: the current image signal distribution technology is generally used for the distribution of ordinary high-definition signal processing, and has the defect of insufficient definition. Firstly, the AHD (Analog High Definition, analog high-definition) analog high-definition signal distribution problem is not supported, and secondly, the image distortion problem caused by signal attenuation in the signal distribution technology.

[0003] Therefore, how to provide a control box with an embedded image signal distribution circuit to realize the processing of AHD analog high-definition signals has become a technical problem to be solved. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the problems in the related art, the application aims to provide a control box with an embedded image signal distribution circuit, which can avoid the problem of image distortion caused by signal attenuation.

[0005] The application is realized by the following technical solutions.

[0006] The technical solution provides a control box with an embedded image signal distribution circuit, which comprises:

[0007] The control box is externally provided with a camera interface, a video interface and a display screen interface in sequence, and is internally provided with a video distribution module, a power module and a protection module in sequence.

[0008] The video distribution module comprises three groups of high-speed video buffers and video amplifiers, and is used for avoiding image distortion.

[0009] The control box is further provided with a video distribution module, which is externally connected to a camera through the camera interface, and outputs AHD signals to the video distribution module.

[0010] The control box is further provided with a video distribution module, which is externally connected to a display screen through the display screen interface, and is used for AHD signal output.

[0011] The control box is further provided with a video distribution module, which is externally connected to a DVR (Digital Video Recorder, digital video recorder) product through the video interface, and is used for AHD signal output.

[0012] The utility model further sets up, the display screen is connected with power module electricity through the interface setting, the display screen output power signal to power module, power module is used for voltage stabilizing.

[0013] The utility model further sets up, the display screen is connected with camera electricity for power supply through the interface setting.

[0014] The utility model further sets up, power module is connected with video distribution module electricity, power module is used for output power signal to video distribution module, protection module is used for static protection.

[0015] The above technical scheme has the following technical effects: the camera outputs AHD image signal to the video distributor control box, the control box outputs two-way AHD signal, one-way AHD signal is output to the display screen, the other way AHD signal is output to the DVR product, and three groups of high-speed video buffer and video amplifier are set up, each video buffer area has the full signal bandwidth of -3dB more than 200MHz, the conversion rate is more than 300V / μs, and the crosstalk is -65dB, under the frequency of 1MHz, the differential gain error is 0.01%, and the differential phase error is 0.02, the problem of image distortion caused by signal attenuation is solved.

[0016] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory and are not restrictive of the application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures, and wherein exemplary embodiments of the application are shown.

[0018] Figure 1 It is the structural schematic diagram shown in an embodiment of the application.

[0019] Figure 2 It is the control box schematic diagram shown in an embodiment of the application.

[0020] Figure 3 It is the video distribution module schematic diagram shown in an embodiment of the application.

[0021] Figure 4 It is the schematic diagram shown in an embodiment of the application.

[0022] Reference signs: 1, control box, 2, camera, 3, display screen, 4, camera interface, 5, video distribution module, 6, video interface, 7, display screen interface, 8, power module, 9, protection module. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0024] The technical solutions of the embodiments of the present application will be described in detail below with reference to the drawings.

[0025] The utility model discloses a control box of built -in image signal distribution circuit, as shown in Figures 1-4 The utility model discloses a control box of built -in image signal distribution circuit, as shown in

[0026] Control box 1, the outside of control box 1 is sequentially provided with camera interface 4, video interface 6 and display screen interface 7, the inside of control box is sequentially provided with video distribution module 5, power module 8 and protection module 9.

[0027] Among them, the video distribution module 5 includes three groups of high -speed video buffer and video amplifier, for avoiding image distortion.

[0028] It needs to be explained that after the camera 2 exports AHD signal to the video distributor control box 1, the control box 1 can export two-way AHD signal, wherein one-way AHD signal is exported to the display screen 3, and the other way AHD signal is exported to the DVR product, in addition, the video distribution module 5 sets every group of video buffer zone to have-3dB more than 200MHz full signal bandwidth, conversion rate is more than 300V / μs, crosstalk is-65dB, under the frequency of 1MHz, differential gain error is 0.01%, and differential phase error is 0.02, and the image distortion problem caused by signal attenuation can be avoided.

[0029] As shown in Figures 1-2 The video distribution module 5 provided in the control box 1 is externally connected with the camera 2 through the camera interface 4, and the camera 2 exports AHD signal to the video distribution module 5.

[0030] As shown in Figures 1-2 The video distribution module 5 provided in the control box 1 is externally connected with the display screen 3 through the display screen interface 7, and the video distribution module 5 is used for AHD signal output.

[0031] As shown in Figures 1-2 The video distribution module 5 provided in the control box 1 is externally connected with the DVR product through the video interface 6, and the video distribution module 5 is used for AHD signal output.

[0032] As shown in Figures 1-2As shown, the display screen 3 is electrically connected to the power module 8 through a set interface. The display screen 3 outputs a power signal to the power module 8, and the power module 8 is used for voltage reduction and regulation.

[0033] like Figure 2 As shown, the power module 8 is electrically connected to the video distribution module 5. The power module 8 is used to output power signals to the video distribution module 5. The protection module 9 is used for electrostatic protection and can withstand electrostatic surge impacts of 4-8KV.

[0034] It should be noted that the display screen 3 is electrically connected to the camera 2 through the set interface for power supply. The video interface of the display screen 3 outputs a 12V power signal to the power module 8. The power module 8 can perform step-down and voltage regulation processing and output 5V to power the video distribution module 5. The power module 8 can support a maximum power input of 36V.

[0035] Specifically, the video distribution module 5 operates in a single power supply environment of 2.5V to 5.5V, consuming a quiescent current of 27.5mA, resulting in low power consumption.

[0036] Working principle: The camera 2 outputs an AHD video signal to the video distributor control box 1. The control box 1 outputs two AHD signals, one of which is output to the display screen 3, and the other is output to the DVR product. It is equipped with three sets of high-speed video buffers and video amplifiers. Each video buffer has a full signal bandwidth of over 200MHz with a bandwidth of -3dB, a slew rate of over 300V / μs, and crosstalk of -65dB. At a frequency of 1MHz, the differential gain error is 0.01%, and the differential phase error is 0.02°, which solves the problem of image distortion caused by signal attenuation.

[0037] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A control box with a built-in image signal distribution circuit, characterized in that, include: The control box (1) is provided with a camera interface (4), a video interface (6) and a display screen interface (7) on its exterior, and a video distribution module (5), a power supply module (8) and a protection module (9) are provided inside the control box. The video distribution module (5) includes three sets of high-speed video buffers and video amplifiers to avoid image distortion.

2. The control box with built-in image signal distribution circuit according to claim 1, characterized in that, The video distribution module (5) inside the control box (1) is connected to an external camera (2) through the camera interface (4), and the camera (2) outputs an AHD signal to the video distribution module (5).

3. The control box with built-in image signal distribution circuit according to claim 1, characterized in that, The video distribution module (5) inside the control box (1) is connected to the external display screen (3) through the display screen interface (7). The video distribution module (5) is used for AHD signal output.

4. The control box with built-in image signal distribution circuit according to claim 1, characterized in that, The video distribution module (5) inside the control box (1) is connected to an external DVR product through a video interface (6). The video distribution module (5) is used for AHD signal output.

5. The control box with built-in image signal distribution circuit according to claim 3, characterized in that, The display screen (3) is electrically connected to the power module (8) through a set interface. The display screen (3) outputs a power signal to the power module (8), and the power module (8) is used for voltage reduction and regulation.

6. The control box with built-in image signal distribution circuit according to claim 3, characterized in that, The display screen (3) is electrically connected to the camera (2) through a set interface for power supply.

7. The control box with built-in image signal distribution circuit according to claim 5, characterized in that, The power module (8) is electrically connected to the video distribution module (5). The power module (8) is used to output power signals to the video distribution module (5). The protection module (9) is used for electrostatic protection.

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