Open and short circuit testing tool for sub flat cable of display screen

Abstract

The utility model discloses a display screen sub flat cable open and short circuit test tool, which is characterized in that a main flat cable and an auxiliary flat cable of a product are connected through lines, adjacent signal lines are connected in a staggered manner to form two paths of conduction lines, one path is odd-numbered, and the other path is even-numbered; lED lamps are respectively connected in series on the two conduction lines to indicate whether the two conduction lines are conducted or not. The single body can be tested at various stations before being made into a finished product, and defective products are effectively prevented from flowing into the next procedure to cause a lot of material waste.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible cable testing, and more specifically to a short - circuit and open - circuit testing tool for the flexible cable of a display screen. Background Art

[0002] To meet the requirements of the client, the flexible PCB circuit board of the display screen not only needs to realize the function of displaying on the client's main board, but also needs to add signal lines such as the main board speaker, antenna, vibration, etc. inside the PCB board.

[0003] However, currently, the test fixtures in the industry for testing the display function basically do not provide the function of testing the open - circuit and short - circuit of signal lines such as speakers, antennas, and vibration signal lines. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a short - circuit and open - circuit testing tool for the flexible cable of a display screen, in order to solve the technical problems existing in the background art.

[0005] In order to achieve the above - mentioned purpose, the utility model adopts the following technical solutions:

[0006] A short - circuit and open - circuit testing tool for the flexible cable of a display screen includes: connecting the main cable and the secondary cable of the product through a circuit, and connecting the adjacent signal lines in a staggered manner to form two conduction lines, where one is for odd - numbered bits and the other is for even - numbered bits; LED lights are respectively connected in series on the two conduction lines to indicate whether conduction occurs.

[0007] In some embodiments, corresponding positive and negative voltages are input to pins 1 and 3 of the main cable.

[0008] In some embodiments, the signal output from the ARM board of the main cable is transferred to the LCM screen; the corresponding voltage for testing the secondary cable is transferred to the LCM screen.

[0009] In some embodiments, the connectors used on the main cable and the secondary cable are adjusted accordingly with reference to the connector model of the LCM screen, and the LEDs are placed separately during LED layout.

[0010] The beneficial effects of the utility model compared with the prior art are as follows:

[0011] Aiming at the deficiencies of the existing industry technology, the purpose of the utility model is to provide a tool that can test the open - circuit and short - circuit of the lines such as speakers, antennas, and vibration used by the client on the flexible PCB circuit board integrated on the display screen. This tool designs a small flexible cable for different cases, and judges whether the corresponding line to be tested is open - circuited or short - circuited by the on - off of the LED lights. It can realize the testing of various workstations before the monomer is made into a finished product, effectively preventing defective products from flowing into the next process and causing a lot of material waste. Description of the Drawings

[0012] Figure 1 For

[0013] Figure 2 For

[0014] Figure 3 For

[0015] Figure 4 For Detailed implementation manners

[0016] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The described embodiments are some but not all of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application and should not be construed as a limitation to the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0017] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0018] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection or an indirect connection through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0019] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0020] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or display that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or displays.

[0021] The following will be combined with Figures 1-4 to elaborate in detail on a short - circuit and open - circuit test tool for the flexible cable of a display screen involved in the embodiments of this application. It should be noted that the following embodiments are only used to explain this application and do not constitute a limitation to this application.

[0022] Embodiment 1:

[0023] As Figure 1 shown, the product is divided into a main flexible cable and a secondary flexible cable, with a circuit connection between them. Only the main flexible cable is used during the lighting test, and the lines on the secondary flexible cable do not affect the lighting, so they cannot be tested.

[0024] As Figure 2 shown, by inputting corresponding positive and negative voltages to pins 1 and 3 of the main flexible cable's pin definition, and connecting adjacent signal lines staggeredly, a conducting circuit is formed, and an LED is connected in series in the middle to indicate whether it is conducting.

[0025] As Figure 2 shown, it is designed that the signal output from the ARM board by the main flexible cable is transferred to the LCM screen. The role of the main flexible cable is to output the signals required to light up the screen by the ARM and transfer the corresponding voltage for testing the secondary flexible cable to the LCM screen. Different voltage values are set between adjacent PINs of the secondary flexible cable, and 1 LED is connected in series. Whether there is a short - circuit is judged by the voltage difference.

[0026] As Figure 3 It is designed that the secondary flexible cable obtains the voltage of the secondary - row PIN of the LCM screen and forms a conduction with the GND on the screen. Each group is connected in series with a corresponding LED to indicate whether it is conducting, with a total of 2 lights.

[0027] As Figure 4 shown, the connectors used on the main flexible cable / secondary flexible cable are adjusted accordingly with reference to the connector model of the LCM screen. When arranging the LEDs, they are placed separately, which is convenient for the tester to distinguish open - circuit and short - circuit.

[0028] Result: If all the LEDs are on, the conduction is OK. If the LEDs are not on, there is an open - circuit or a short - circuit.

[0029] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A short - circuit and open - circuit test tool for the flexible cable of a display screen, characterized in that, Including: Connect the main wiring harness and the secondary wiring harness of the product through a circuit. The adjacent signal lines are connected staggeredly to form two conduction circuits. One circuit is for odd positions and the other is for even positions. LED lights are respectively connected in series on the two conduction circuits to indicate whether conduction occurs.

2. The short - circuit and open - circuit test tool for the flexible flat cable of the display screen according to claim 1, wherein Input corresponding positive and negative voltages to pins 1 and 3 of the main wiring harness pin.

3. A short - circuit and open - circuit test tool for the flexible flat cable of a display screen according to claim 1, characterized in that, Transfer the signal output from the ARM board by the main wiring harness to the LCM screen; transfer the corresponding voltage for testing the secondary wiring harness to the LCM screen.

4. A short - circuit and open - circuit test tool for the flexible cable of a display screen according to claim 1, characterized in that Make corresponding adjustments to the connectors used on the main wiring harness and the secondary wiring harness with reference to the connector model of the LCM screen, and place the LEDs separately during LED layout.

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