CN218568406U - HDMI interface display screen ageing testing board - Google Patents

Abstract

The utility model belongs to the technical field of the technique of HDMI display screen test and specifically relates to a HDMI interface display screen burn-in test board is related to, including host system, expansion module, power input interface, HDMI input interface and a plurality of HDMI output interface, host system is coupled with expansion module, power input interface is all connected to host system's input and expansion module's input, HDMI input interface and expansion module's input electric connection, the equal electric connection expansion module's of input of HDMI output interface output module output, the beneficial effect of this application: the main control module plays a role in control, the HDMI input interface inputs signals to the expansion module, the expansion module outputs the signals to the display screen from the HDMI output interface after dividing the signals into a plurality of signals, and the aging detection efficiency of the HDMI interface display screen is improved.

Description

HDMI interface display screen ageing testing board

Technical Field

The application relates to the technical field of HDMI display screen testing, in particular to an aging test board for an HDMI interface display screen.

Background

The HDMI is also called a high definition multimedia interface, and is a full digital video and audio transmission interface, which can transmit uncompressed audio and video signals, and the current display screen usually adopts the HDMI for signal transmission.

The display screen with the HDMI interface needs to carry out aging testing to the HDMI interface through the industrial control mainboard on the market after accomplishing production and processing operation, and present industrial control mainboard only is provided with an HDMI output interface usually, can only carry out aging testing to a display screen simultaneously, influences detection efficiency, and above-mentioned problem remains to be solved.

SUMMERY OF THE UTILITY MODEL

In order to promote the ageing detection efficiency of HDMI interface display screen, this application provides an HDMI interface display screen ageing tests board, adopts following technical scheme:

the utility model provides a HDMI interface display screen ageing tests board, includes host system, expansion module, power input interface, HDMI input interface and a plurality of HDMI output interface, host system is coupled with expansion module, power input interface is all connected to host system's input and expansion module's input, HDMI input interface and expansion module's input electric connection, the equal electric connection expansion module's of HDMI output interface's input output.

By adopting the above scheme, host system is used for driving the work of extension module, HDMI input interface is to extension module input signal, handle the back through extension module, to a plurality of HDMI output interface carry signal, power input interface inserts external power, and to host system, the extension module power supply, many HDMI interface display screens are connected at HDMI output interface, thereby play the effect of carrying out aging testing simultaneously to many HDMI interface display screens, the use quantity of industry control mainboard has been reduced, reduce the test cost, reach the effect that improves aging testing efficiency.

Preferably, the main control module and the expansion module are both provided with I2C interfaces for interconnection.

By adopting the scheme, the main control module is connected with the extension module through the I2C interface, so that the connection structure of the main control module and the extension module is simplified, and the effect of improving the connection reliability of the main control module and the extension module is achieved.

Preferably, the expansion module includes a chip U2, the main control module includes a chip U3, the I2C interface specifically includes a twenty-first pin and a twenty-second pin of the chip U2 and a first pin and a second pin of the chip U3, and the chip U2 and the chip U3 are coupled through the I2C interface.

By adopting the scheme, the first pin and the twenty-first pin are connected through the external connection line, and the second pin and the twenty-second pin are connected through the external connection line, so that the chip U2 is connected with the chip U3, and the effect of electrically connecting the main control module and the extension module is achieved.

Preferably, an indicator light module for detecting the connection state of the HDMI signal in real time is coupled to the main control module.

By adopting the above scheme, the pilot lamp module is used for reflecting the connection state of the HDMI signal, so that the user can observe the wiring condition and the signal transmission condition visually, and the convenience in use of the aging test board is improved.

Preferably, a plurality of power output interfaces are coupled to the power input interface.

By adopting the above scheme, power input interface communicates outside power after, to a plurality of power output interface power transmission, and power output interface supplies power for the display screen, and the display screen need not supply power with extra power, reaches the effect that promotes the ageing detection efficiency of HDMI interface display screen.

Preferably, the HDMI input interface is provided with a first interface protection unit for enhancing test stability.

By adopting the above scheme, first interface protection unit is used for promoting the signal stability that outside was inputed to extension module from HDMI input interface, makes the signal that the test was carried more stable, reaches the effect that promotes the ageing detection efficiency of HDMI interface display screen.

Preferably, each HDMI output interface is provided with a second interface protection unit.

By adopting the above scheme, the second interface protection unit is used for improving the stability that the HDMI carried the display screen to make the signal that the test was carried more stable, reach the effect that promotes the ageing detection efficiency of HDMI interface display screen.

Preferably, the first interface protection unit and the second interface protection unit are formed by coupling a plurality of TVS tubes.

By adopting the scheme, the TVS tube is used for suppressing interference voltage, so that the stability of signal transmission is improved, and the effect of stably transmitting HDMI signals is achieved.

In summary, the present application includes at least one of the following beneficial technical effects:

the power input interface supplies power to host system and expansion module, host system drive expansion module work, and handle the HDMI signal of input, HDMI input interface is used for connecting outside signal, with HDMI signal input to expansion module, expansion module output a plurality of HDMI signals is followed HDMI output interface and is exported, outside display screen acquires the signal through connecting at HDMI output interface, thereby ageing detection, play the effect of carrying out the detection to many display screens simultaneously, reach the effect that improves ageing detection efficiency.

Drawings

Fig. 1 is a block diagram of an HDMI display screen burn-in board according to an embodiment of the present application.

Fig. 2 is a schematic circuit diagram of an expansion module according to an embodiment of the present application.

Fig. 3 is a schematic circuit diagram of the main control module and the indicator light module according to the embodiment of the present application.

Fig. 4 is a schematic circuit diagram of the power input interface and the power output interface according to the embodiment of the present application.

Fig. 5 is a schematic circuit diagram of an HDMI input interface according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a first circuit principle of the HDMI output interface according to the embodiment of the present application.

Fig. 7 is a schematic diagram of a second circuit of the HDMI output interface according to the embodiment of the present application.

Fig. 8 is a schematic diagram of a third circuit of the HDMI output interface according to the embodiment of the present application.

Fig. 9 is a schematic diagram of a fourth circuit of the HDMI output interface according to the embodiment of the present application.

Description of reference numerals: 1. a main control module; 2. an expansion module; 3. a power input interface; 4. an HDMI input interface; 41. a first interface protection unit; 5. an HDMI output interface; 52. a second interface protection unit; 6. an indicator light module; 7. and a power output interface.

Detailed Description

The present application is described in further detail below with reference to fig. 1-9.

The embodiment of the application discloses HDMI interface display screen ageing tests board, refer to fig. 1 and fig. 2, including host system 1 and expansion module 2, host system 1 and expansion module 2 all are connected with power input interface 3, and power input interface 3 connects external power, to host system 1 and expansion module 2 power supply. The main control module 1 is coupled to the expansion module 2, drives the expansion module 2, and processes information received by the expansion module 2. The expansion module 2 is coupled with an HDMI input interface 4 and a plurality of HDMI output interfaces 5, the HDMI input interface 4 is connected with external equipment, thereby HDMI signals are transmitted to the expansion module 2, a single HDMI signal is processed by the expansion module 2 and then transmitted to the plurality of HDMI output interfaces 5, a plurality of HDMI interface display screens are electrically connected to the HDMI output interfaces 5, thereby a plurality of display screens simultaneously receive the HDMI signals for aging detection, the use number of industrial control mainboards is reduced, the test cost is reduced, and the effect of improving the aging detection efficiency is achieved.

Referring to fig. 2 and 3, the main control module 1 includes a chip U3, the chip U3 is specifically a single chip microcomputer of model N76E003AT20, and the fourth pin, the eighth pin and the ninth pin of the chip U3 are all electrically connected with a capacitor and then grounded, so as to filter low frequencies. The first pin and the second pin of the chip U3 serve as pins for electrically connecting the expansion module 2. The expansion module 2 comprises a chip U2, the specific model of the chip U2 is LT86104SXE, a twenty-first pin and a twenty-second pin of the chip U2 are used as pins for electrically connecting the chip U3, the first pin is electrically connected with the twenty-first pin, the second pin is electrically connected with the twenty-second pin, and therefore the chip U2 is electrically connected with the chip U3, and information is transmitted.

Specifically, the first pin and the second pin of U3 and the twenty-first pin and the twenty-second pin of U2 are I2C interfaces, and main control module 1 is connected with expansion module 2 through the I2C interfaces, and the connection structure of main control module 1 and expansion module 2 has been simplified to the I2C interfaces to promote main control module 1 and expansion module 2's connection reliability.

Referring to fig. 4, the power input interface 3 is specifically a Micro USB interface for connecting an external power source. The fifth pin of the power input interface 3 is grounded, the first pin is electrically connected with the anodes of the capacitor C7 and the capacitor C8 after being connected with the resistor FB1, the anodes of the capacitor C7 and the capacitor C8 are connected with a positive power supply, and the other end of the capacitor C7 and the other end of the capacitor C8 are grounded.

The power input interface 3 is coupled with a plurality of power output interfaces 7, the number of the power output interfaces 7 is specifically four, and the number of the power output interfaces 7 is the same as that of the HDMI output interfaces 5. The power output interface 7 specifically adopts a USB interface, and is connected with the display screen through a data line of the USB connector, so as to supply power for the display screen.

Referring to fig. 5, one HDMI input interface 4 is provided, and the HDMI input interface 4 is provided with a first interface protection unit 41, where the first interface protection unit 41 is used to improve the stability of signals externally input from the HDMI input interface 4 to the expansion module 2. The first interface protection units 41 are specifically model number RCLAMP0524P low-capacitance TVS diode arrays, and are specifically provided with two, and the two first interface protection units 41 are coupled to the HDMI input interface 4, so that signals transmitted by testing are more stable. And the fifteenth pin, the sixteenth pin and the nineteenth pin of the HDMI input interface 4 are all connected in series with a bidirectional TVS tube and then grounded, so as to play a role in suppressing interference voltage.

Referring to fig. 6 and 7, four HDMI output interfaces 5 are provided, and each HDMI output interface 5 is provided with a second interface protection unit 52. The second interface protection unit 52 is used to improve the stability of the HDMI transmitted to the display screen, so that the signal transmitted by the test is more stable. The second interface protection unit 52 specifically uses a low-capacitance TVS diode array with the same model number as the first interface protection unit 41, namely, RCLAMP0524P, and two low-capacitance TVS diode arrays are coupled to each HDMI output interface 5, so as to play a role in suppressing interference voltage.

Referring to fig. 7 and 8, the fifteenth pin, the sixteenth pin, and the nineteenth pin of the HDMI output interface 5 are all connected in series to a bidirectional TVS tube and then grounded, and the first HDMI output interface 5 is electrically connected to the twelfth pin, the eleventh pin, the ninth pin, the eighth pin, the sixth pin, the fifth pin, the third pin, and the twelfth pin of the chip U2 in sequence through the first pin, the third pin, the fourth pin, the sixth pin, the seventh pin, the ninth pin, the tenth pin, and the twelfth pin, so that the HDMI output interface 5 is connected to the chip U2.

Specifically, the structure of the other three HDMI output interfaces 5 is the same as that of the first HDMI output interface 5, and the other three HDMI output interfaces are respectively coupled to the chip U2, and the connection pins refer to fig. 2.

Referring to fig. 3, an indicator lamp module 6 for detecting the HDMI signal connection state in real time is coupled to the main control module 1. The indicator light modules 6 are specifically provided with five groups, and each group of indicator light modules 6 are connected in parallel. The indicator light module 6 comprises a resistor and a light emitting diode, one end of the resistor is connected with 3.3V voltage, the other end of the resistor is electrically connected with the anode of the light emitting diode, and the cathode of the light emitting diode is connected with the chip U3.

Specifically, five groups of indicator light modules 6 are electrically connected to the fourteenth pin to the nineteenth pin of the chip U3 in sequence, and the indicator light modules 6 are used for reflecting the connection state of the HDMI signals, so that the user can visually observe the wiring condition and the signal transmission condition.

The principle of the embodiment of the application is as follows: power input interface 3 supplies power to host system 1 and extension module 2, host system 1 drive extension module 2 work, and handle the HDMI signal of input, HDMI input interface 4 is used for connecting outside equipment, the HDMI signal with external equipment passes through HDMI input interface 4 and inputs to extension module 2, extension module 2 is handled and is obtained a plurality of HDMI signals, and export from HDMI output interface 5, the HDMI interface display screen passes through the wiring and connects at HDMI output interface 5, thereby obtain the signal, and then ageing detection, play the effect of detecting many display screens simultaneously, reach the effect that improves ageing detection efficiency.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a HDMI interface display screen ageing tests board, its characterized in that, includes host system (1), expansion module (2), power input interface (3), HDMI input interface (4) and a plurality of HDMI output interface (5), host system (1) is coupled with expansion module (2), power input interface (3) is all connected to the input of host system (1) and the input of expansion module (2), the input electric connection of HDMI input interface (4) and expansion module (2), the output of the equal electric connection expansion module of input (2) of HDMI output interface (5).

2. The HDMI display screen burn-in board according to claim 1, wherein the main control module (1) and the expansion module (2) are both provided with I2C interfaces for interconnection.

3. The HDMI display screen burn-in board according to claim 2, wherein the expansion module (2) includes a chip U2, the main control module (1) includes a chip U3, the I2C interfaces are specifically a twenty-first pin and a twenty-second pin of the chip U2 and a first pin and a second pin of the chip U3, and the chip U2 and the chip U3 are coupled through an I2C interface.

4. The HDMI display screen burn-in board according to claim 1, wherein an indicator light module (6) for detecting the HDMI signal connection status in real time is coupled to the main control module (1).

5. The HDMI video burn-in board according to claim 1, wherein a plurality of power output interfaces (7) are coupled to the power input interfaces (3).

6. The HDMI display burn-in board according to claim 1, wherein said HDMI input interface (4) is provided with a first interface protection unit (41) for enhancing test stability.

7. An HDMI interface display burn-in board according to claim 6, wherein each HDMI output interface (5) is provided with a second interface protection unit (52).

8. The HDMI display screen burn-in board according to claim 7, wherein the first interface protection unit (41) and the second interface protection unit (52) are each formed by coupling a plurality of TVS tubes.

Images