Multimedia interface switching module of test equipment

Abstract

The utility model aims to provide the multimedia interface switching module of the test equipment, which has the advantages of small volume, high portability, low cost, long service life, low error rate and wide universality. The device comprises a device A, a device B, a first signal switching module, a second signal switching module, an HDMI switching module and a power supply module, the device A and the device B are connected to the HDMI switching module through the first signal switching module, and the HDMI switching module is connected with an external terminal using device through the second signal switching module. And the power supply module is connected with the HDMI switching module. The device is applied to the technical field of automatic testing.

Description

TECHNICAL FIELD

[0001] The utility model relates to a technical field of automation test especially relates to a multimedia interface switching module of test equipment. BACKGROUND

[0002] HDMI: High Definition Multimedia Interface, refers to high definition multimedia interface, along with the vigorous development of science and technology and various high-tech industries, HDMI also occupies an important position in modern manufacturing industry. In the test industry, the detection of the function test equipment for HDMI is particularly important for the switching of HDMI signals in automation test. With the increasing number of company projects, the following problems are exposed in the OQC level: for the existing HDMI channel switching scheme, the following problems exist when facing multi-channel test design: few channels, in many cases, the switching of HDMI signals is one-to-one, which is not suitable for many external devices, and it is impossible to test multiple HDMI ports in limited resources; Large volume, most of the existing HDMI channel switching devices on the market are large in size and occupy a large space; High cost, most of the HDMI test devices that need to be connected are single-channel devices, which are high in single set cost and low in reuse rate; Therefore, it is necessary to provide a multimedia interface switching module of test equipment, which has the advantages of small size, high portability, low cost, long service life, low error rate and wide versatility. CONTENT OF THE UTILITY MODEL

[0003] The utility model solves the technical problems of the prior art and provides a multimedia interface switching module of test equipment, which has the advantages of small size, high portability, low cost, long service life, low error rate and wide versatility.

[0004] The utility model adopts the technical scheme: the utility model discloses equipment A, equipment B, first signal switching module, second signal switching module, HDMI switching module, power module, equipment A and equipment B all are connected with HDMI switching module through first signal switching module, and HDMI switching module is connected with external terminal use equipment through second signal switching module, and power module is connected with HDMI switching module.

[0005] From the above scheme, the present application has the following advantages:

[0006] 1. Wide versatility: this test system has high flexibility and configurability, can adapt to the application requirements of various different products, is compatible with HDMI2.0, HDMI 1.4 and earlier HDMI standards, and does not need to select other schemes for each protocol;

[0007] 2. Long service life: The standardized design enables the module to be conveniently applied to different application scenarios, while ensuring consistency and reliability of the application;

[0008] 3. Wide functional coverage: It contains all the functions of HDMI, such as TMDS, CEC, HPD, DDC, and Power;

[0009] 4. Cost reduction: The HDMI switching module is designed to address the vast majority of single-channel application devices on the market, such as HDMI test instruments in the testing industry. By switching channels, the need for additional test instruments is reduced, and the test instruments are very expensive, greatly reducing costs;

[0010] 5. Small size and high portability: Compared with the common HDMI channel switch on the market, the size is very small and portable.

[0011] The present application supports the switching of dual-channel HDMI or even multi-channel HDMI of various HDMI protocols through the HDMI switching module, which can maximize the signal transmission quality of the HDMI signal during the switching process. At the same time, it has high circuit integration, greatly reducing the required volume space, and can customize the required number of switching channels according to customer needs, reducing unnecessary costs, realizing compatibility with HDMI2.0, HDMI1.4, and earlier HDMI standards, and realizing the switching function of HDMI full function, which can meet the various application needs of users.

[0012] One preferred solution is that the multimedia interface switching module of the test device further includes a level switching module, the power supply module is connected with the HDMI switching module through the level switching module, the level switching module includes a low dropout regulator, a VOUT terminal of the low dropout regulator is connected with the HDMI switching module, and a VIN terminal of the low dropout regulator is connected with the power supply module.

[0013] One preferred solution is that the HDMI switching module includes a bidirectional multiplexer.

[0014] One preferred solution is that the first signal switching module includes a first interface and a second interface, the device A is connected with the bidirectional multiplexer through the first interface, and the device B is connected with the bidirectional multiplexer through the second interface.

[0015] One preferred solution is that the second signal switching module includes a third interface, and the bidirectional multiplexer is connected with an external terminal use device through the third interface. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural diagram of the utility model;

[0017] Figure 2 is the circuit principle diagram of the HDMI switch module;

[0018] Figure 3 is the circuit principle diagram of the first interface;

[0019] Figure 4 is the circuit principle diagram of the second interface;

[0020] Figure 5 is the circuit principle diagram of the third interface;

[0021] Figure 6 is the circuit principle diagram of the power supply module and the level switch module. DETAILED DESCRIPTION

[0022] As Figure 1 shown, in the embodiment, the utility model includes equipment A, equipment B, first signal switching module 3, second signal switching module 4, HDMI switch module 5, power supply module 6, the equipment A and the equipment B are all connected with the HDMI switch module 5 through the first signal switching module 3, the HDMI switch module 5 is connected with the terminal use equipment outside through the second signal switching module 4, and the power supply module 6 is connected with the HDMI switch module 5.

[0023] The power supply module 6 is used to control the switching of HDMI channel by the input control end pin of external equipment and integrates the loop of external power supply to supply power to the circuit related to the HDMI switch module 5, the first signal switching module 3 and the second signal switching module 4 are mainly used to support the multi-path access of equipment A and equipment B needing to be switched and the output after switching, the HDMI switch module 5 is powered by 2.6V to 4.5V power supply and is suitable for battery power application. The on-resistance (RON) of the device is low and the I / O capacitance is small, and the bandwidth of up to 7.5GHz typical value can be realized. The device can provide the required high bandwidth for HDMI and DisplayPort applications.

[0024] As Figure 1 and Figure 6As shown in the figure, in the embodiment, the multimedia interface switching module of the test device further comprises a level switching module 7, the power supply module 6 is connected with the HDMI switching module 5 through the level switching module 7, and the level switching module 7 comprises a low dropout regulator U601, a VOUT end of the low dropout regulator U601 is connected with the HDMI switching module 5, and a VIN end of the low dropout regulator U601 is connected with the power supply module 6.

[0025] The model of the low dropout regulator U601 is TPS7A0533PDBVR, and the level switching module 7 is mainly used for switching the externally input voltage of 5V to 3V3 to supply power to the circuit related to the HDMI switching module 5.

[0026] As shown in the figure, Figure 2 In the embodiment, the HDMI switching module 5 comprises a bidirectional multiplexer U602. The model of the bidirectional multiplexer U602 is TS3DV642A0RUAR, and the bidirectional multiplexer U602 is a 12-channel 1:2 or 2:1 bidirectional multiplexer / demultiplexer. The bidirectional multiplexer U602 can be powered by a power supply of 2.6V to 4.5V and is suitable for battery power supply.

[0027] As shown in the figure, Figures 3-4 In the embodiment, the first signal switching module 3 comprises a first interface J603 and a second interface J604, the device A is connected with the bidirectional multiplexer U602 through the first interface J603, and the device B is connected with the bidirectional multiplexer U602 through the second interface J604.

[0028] As shown in the figure, Figure 5 In the embodiment, the second signal switching module 4 comprises a third interface J602, and the bidirectional multiplexer U602 is connected with an external terminal use device through the third interface J602.

Claims

1. A multimedia interface switching module for a testing device, comprising device A (1) and device B (2), characterized in that: The multimedia interface switching module of the test equipment also includes a first signal conversion module (3), a second signal conversion module (4), an HDMI switching module (5), and a power supply module (6). Both device A (1) and device B (2) are connected to the HDMI switching module (5) through the first signal conversion module (3). The HDMI switching module (5) is connected to an external terminal device through the second signal conversion module (4). The power supply module (6) is connected to the HDMI switching module (5).

2. The multimedia interface switching module of a testing device according to claim 1, characterized in that: The multimedia interface switching module of the test equipment also includes a level switching module (7). The power supply module (6) is connected to the HDMI switching module (5) via the level switching module (7). The level switching module (7) includes a low-dropout regulator (U601). The VOUT terminal of the low-dropout regulator (U601) is connected to the HDMI switching module (5), and the VIN terminal of the low-dropout regulator (U601) is connected to the power supply module (6).

3. The multimedia interface switching module of a testing device according to claim 1, characterized in that: The HDMI switching module (5) includes a bidirectional multiplexer (U602).

4. The multimedia interface switching module of a testing device according to claim 3, characterized in that: The first signal conversion module (3) includes a first interface (J603) and a second interface (J604). The device A (1) is connected to the bidirectional multiplexer (U602) via the first interface (J603), and the device B (2) is connected to the bidirectional multiplexer (U602) via the second interface (J604).

5. The multimedia interface switching module of a testing device according to claim 3, characterized in that: The second signal conversion module (4) includes a third interface (J602), through which the bidirectional multiplexer (U602) is connected to an external terminal device.

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