TFT screen testing device

Abstract

The utility model provides a TFT screen testing device which comprises an HDMI input socket, an HDMI-to-LVDS chip, an LVDS output socket, a power input socket, an MCU and a backlight module. The input end of the HDMI-to-LVDS chip is connected with the HDMI input socket, the output end of the HDMI-to-LVDS chip is connected with the LVDS output socket, the HDMI-to-LVDS chip is used for converting an HDMI signal provided by the HDMI input socket into an LVDS signal and sending the LVDS signal to the LVDS output socket, and the other end of the LVDS output socket is connected with a TFT screen to be tested; the MCU is respectively connected with the HDMI-to-LVDS chip and the backlight module, and is used for controlling a switch of the backlight module after acquiring an HDMI signal; one end of the power supply input socket is connected with the HDMI-to-LVDS chip, and the other end of the power supply input socket is used for being connected with a power supply. The TFT screen testing device is connected with a computer, a mobile phone or a video player in an HDMI input mode through the HDMI input socket, the HDMI-to-LVDS chip and the LVDS output socket, and is connected with a TFT screen to be tested in an LVDS output mode, so that signal conversion is completed, and the testing efficiency and convenience are improved.

Description

Technical Field

[0001] This utility model relates to the field of TFT display and touch screen testing technology, and in particular to a TFT screen testing device. Background Technology

[0002] In recent years, TFT display modules have been widely used in automobiles and other machines. In the field of airborne products, TFT screens typically use LVDS interfaces, while the video output interfaces of host computer boards are mostly HDMI interfaces. Testing equipment for TFT screens requires testing the HUD motherboard or the vehicle's main unit, and different TFT screens require different software modifications, resulting in high testing costs and significant testing difficulty. Utility Model Content

[0003] To address the aforementioned issues, the purpose of this invention is to provide a TFT screen testing device that can be directly connected to a computer, mobile phone, or video player via HDMI input and to the TFT screen under test via LVDS output.

[0004] To achieve the above objectives, the specific technical solution of this utility model is as follows:

[0005] A TFT screen testing device includes an HDMI input socket, an HDMI-to-LVDS chip, an LVDS output socket, a power input socket, an MCU, and a backlight module. The input terminal of the HDMI-to-LVDS chip is connected to the HDMI input socket, and the output terminal is connected to the LVDS output socket. The HDMI-to-LVDS chip converts the HDMI signal provided by the HDMI input socket into an LVDS signal and sends the LVDS signal to the LVDS output socket. The other end of the LVDS output socket is connected to the TFT screen under test. The MCU is connected to both the HDMI-to-LVDS chip and the backlight module, and controls the switching of the backlight module after acquiring the HDMI signal. One end of the power input socket is connected to the HDMI-to-LVDS chip, and the other end is connected to a power source.

[0006] More preferably, it also includes a backlight driver chip and a backlight output socket connected in series, wherein the backlight driver chip is connected to the MCU and the backlight output socket is connected to the backlight module.

[0007] More preferably, it also includes an MCU programming interface, which is connected to the MCU.

[0008] More preferably, it also includes an IIC / UART communication interface, which is connected to the MCU.

[0009] More preferably, it also includes a power management IC, which is connected between the power input socket and the HDMI to LVDS chip.

[0010] More preferably, the LVDS output socket includes a first LVDS output socket and a second LVDS output socket, the first LVDS output socket and the second LVDS output socket being used to connect TFT screens of different sizes to be tested.

[0011] More preferably, both the first LVDS output socket and the second LVDS output socket are FPC pin header sockets.

[0012] More preferably, it also includes a power supply, which is connected to the power input socket, and the voltage of the power supply is 8V-16V.

[0013] More preferably, the HDMI to LVDS chip is a Lontium LT8619C.

[0014] More preferably, the MCU is model FS32K116.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] (1) The TFT screen testing device uses an HDMI input socket, an HDMI to LVDS chip, and an LVDS output socket to connect to a computer, mobile phone, or video player via HDMI input and to the TFT screen under test via LVDS output, completing signal conversion without the need for a HUD motherboard or vehicle head unit, thus improving testing efficiency and convenience. (2) A backlight module is added to the TFT screen testing device, and the through-hole MCU controls the backlight module, further improving the testing convenience of the TFT screen under test. (3) A backlight driver chip is added between the backlight module and the MCU. The backlight driver chip receives signals from the MCU and controls the current received by the backlight module to control the brightness of the backlight module, improving the testing accuracy of the TFT screen under test. (4) An MCU programming interface is added to realize MCU software simulation and MCU program burning, which can be adjusted at any time according to testing needs, improving the applicability of the TFT screen testing device. (5) The LVDS output socket includes a first LVDS output socket and a second LVDS output socket, which enables the TFT screen testing device to test TFT screens of different sizes, meet the testing requirements of TFT screens of different sizes, and further improve the applicability of the TFT screen testing device. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 A schematic diagram of the structure of a TFT screen testing device provided by this utility model;

[0019] Figure 2 This is a schematic diagram of another TFT screen testing device provided by this utility model. Detailed Implementation

[0020] To better understand this invention, various aspects of the invention will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of embodiments of the invention and are not intended to limit the scope of the invention in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0021] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0022] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of the present invention, the word "may" is used to indicate "one or more embodiments of the present invention." And the term "exemplary" is intended to refer to an example or illustration.

[0023] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0024] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figure 1 As shown, a TFT screen testing device includes: an HDMI input socket, an HDMI-to-LVDS chip, an LVDS output socket, a power input socket, an MCU, and a backlight module. The input end of the HDMI-to-LVDS chip is connected to the HDMI input socket, and the output end of the HDMI-to-LVDS chip is connected to the LVDS output socket. The HDMI-to-LVDS chip converts the HDMI signal provided by the HDMI input socket into an LVDS signal and sends the LVDS signal to the LVDS output socket. The other end of the LVDS output socket is connected to the TFT screen under test. The MCU is connected to both the HDMI-to-LVDS chip and the backlight module, and is used to control the switching of the backlight module after acquiring the HDMI signal. One end of the power input socket is connected to the HDMI-to-LVDS chip, and the other end of the power input socket is used to connect to a power source. The TFT screen testing device, through the HDMI input socket, HDMI-to-LVDS chip, and LVDS output socket, enables connection to a computer, mobile phone, or video player via HDMI input and connection to the TFT screen under test via LVDS output, completing the signal conversion without the need for a HUD motherboard or vehicle head unit, thus improving testing efficiency and convenience. By incorporating a backlight module into the TFT screen testing device, and using a through-hole MCU to control the backlight module, the testing convenience of the TFT screen under test is further improved. Here, TFT screen refers to ThinFilmTransistor, a color liquid crystal screen formed by thin-film transistors.

[0026] like Figure 2 In one embodiment, the TFT screen testing device further includes a backlight driver chip and a backlight output socket connected in series. The backlight driver chip is connected to the MCU, and the backlight output socket is connected to the backlight module. By adding a backlight driver chip between the backlight module and the MCU, the backlight driver chip receives signals from the MCU, controls the current received by the backlight module, and thus controls the brightness of the backlight module, improving the testing accuracy of the TFT screen under test.

[0027] More preferably, the TFT screen testing device also includes an MCU programming interface, which is connected to the MCU. The addition of the MCU programming interface enables MCU software simulation and MCU program burning, allowing for adjustments as needed based on testing requirements and improving the applicability of the TFT screen testing device.

[0028] In one embodiment, the TFT screen testing device further includes an IIC / UART communication interface, which is connected to the MCU. It should be noted that the IIC interface allows external devices to control the MCU, while the UART interface primarily prints the MCU's operating status. The addition of the IIC / UART communication interface facilitates the control and monitoring of the MCU, improving the testing efficiency of the TFT screen under test.

[0029] In one embodiment, the TFT screen testing apparatus further includes a power management IC connected between the power input socket and the HDMI to LVDS chip.

[0030] In one embodiment, the LVDS output socket includes a first LVDS output socket and a second LVDS output socket, which are used to connect TFT screens of different sizes to be tested. The inclusion of both the first and second LVDS output sockets allows the TFT screen testing device to test TFT screens of different sizes, meeting the testing requirements of TFT screens of varying sizes and further improving the applicability of the TFT screen testing device. Figure 2 As shown, the first LVDS output socket is connected to the first TFT screen under test, which can be a 3.1-inch screen; the second LVDS output socket is connected to the second TFT screen under test, which can be a 4.1-inch screen.

[0031] Based on the above scheme, both the first and second LVDS output sockets are FPC pin header sockets. Considering the wide applicability and strong signal transmission of FPC pin headers, both the first and second LVDS output sockets are set as FPC pin header sockets to improve the applicability of the TFT screen testing device.

[0032] In one embodiment, the TFT screen testing device further includes a power supply connected to a power input socket, and the power supply voltage is 8V-16V. That is, the TFT screen testing device has its own power supply, eliminating the need for an external power source and improving the flexibility of the TFT screen testing device.

[0033] Preferably, the HDMI to LVDS chip is model Lontium LT8619C.

[0034] Preferably, the MCU model is FS32K116.

[0035] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A TFT screen testing device, characterized in that, include: HDMI input socket, HDMI to LVDS chip, LVDS output socket, power input socket, MCU and backlight module; The input terminal of the HDMI to LVDS chip is connected to the HDMI input socket, and the output terminal of the HDMI to LVDS chip is connected to the LVDS output socket. The HDMI to LVDS chip is used to convert the HDMI signal provided by the HDMI input socket into an LVDS signal and send the LVDS signal to the LVDS output socket. The other end of the LVDS output socket is connected to the TFT screen under test; The MCU is connected to the HDMI to LVDS chip and the backlight module respectively, and is used to control the switching of the backlight module after acquiring the HDMI signal; One end of the power input socket is connected to the HDMI to LVDS chip, and the other end of the power input socket is used to connect to a power source.

2. The TFT screen testing device according to claim 1, characterized in that, The TFT screen testing device also includes a backlight driver chip and a backlight output socket connected in series. The backlight driver chip is connected to the MCU, and the backlight output socket is connected to the backlight module.

3. The TFT screen testing device according to claim 2, characterized in that, The TFT screen testing device also includes an MCU programming interface, which is connected to the MCU.

4. The TFT screen testing device according to claim 3, characterized in that, The TFT screen testing device also includes an IIC / UART communication interface, which is connected to the MCU.

5. The TFT screen testing device according to claim 4, characterized in that, The TFT screen testing device also includes a power management IC, which is connected between the power input socket and the HDMI to LVDS chip.

6. The TFT screen testing device according to claim 5, characterized in that, The LVDS output socket includes a first LVDS output socket and a second LVDS output socket, which are used to connect TFT screens of different sizes to be tested.

7. The TFT screen testing device according to claim 6, characterized in that, Both the first LVDS output socket and the second LVDS output socket are FPC pin header sockets.

8. The TFT screen testing device according to claim 7, characterized in that, The TFT screen testing device also includes a power supply, which is connected to the power input socket, and the voltage of the power supply is 8V-16V.

9. The TFT screen testing device according to claim 1, characterized in that, The HDMI to LVDS chip is model Lontium LT8619C.

10. The TFT screen testing device according to claim 1, characterized in that, The MCU model is FS32K116.

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