Display module for preventing ESD (Electro-Static Discharge) interference problem of backlight

Abstract

The utility model discloses a display module for preventing the ESD interference problem of backlight, which comprises a backlight module and a module FPC, the module FPC comprises a backlight bonding pad area and a first joint, a backlight positive electrode bonding pad is electrically connected with the first joint through an LEDA circuit of the module FPC, a backlight negative electrode bonding pad is electrically connected with the first joint through an LEDK circuit of the module FPC, and the backlight positive electrode bonding pad is electrically connected with the first joint through an LED K circuit of the module FPC. A first bidirectional TVS tube and a second bidirectional TVS tube are arranged on the module FPC, one end of the first bidirectional TVS tube is electrically connected with the LEDK circuit, and one end of the second bidirectional TVS tube is electrically connected with the LEDA circuit. According to the utility model, the grounded bidirectional TVS tubes are respectively arranged on the LEDA circuit and the LEDK circuit of the module FPC, so that a good electrostatic protection effect can be realized, an LED lamp at the rear end of the backlight module can be protected, and the ESD interference prevention performance and the product quality of a display module product can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to display module technical field especially relates to a display module of preventing the ESD interference problem of back light appears. BACKGROUND

[0002] At present, the connecting joint of the back light FPC of the back light module is generally welded at the back light pad of the module FPC through the welding mode in the liquid crystal display module of the electronic equipment such as mobile phone. The pad on the back light FPC will lead out a LEDA pole (positive pole) and a plurality of LEDK poles (negative poles), and the positive and negative pole pads are connected to the LED lamp through the wire, and the back light pad on the module FPC is directly connected to the joint through the wire to connect the mainboard of the electronic equipment. The current design is that the positive and negative poles of the back light pad are directly connected to the mainboard of the whole machine through the wire and the joint, and the ESD static test is carried out on the PIN foot of the module FPC, and the ±2KV LED dead lamp phenomenon appears, the reason is that the static electricity enters from the PIN foot of the module FPC, and cannot be transmitted to GND in time, and is directly conducted to the LED lamp, and the LED lamp cannot bear the ±2KV voltage, and finally the LED lamp is broken down

[0003] Therefore, the prior art has defects and needs to be improved. INVENTION CONTENTS

[0004] The utility model discloses a display module of preventing the ESD interference problem of back light appears.

[0005] The utility model discloses a display module of preventing the ESD interference problem of back light appears, including: back light module and module FPC, the module FPC includes back light pad area and first joint, the first joint is used for connecting the mainboard of electronic equipment, the back light pad area includes a back light positive pole pad and a plurality of back light negative pole pad, the back light positive pole pad passes through the LEDA line of module FPC and is electrically connected with the LEDA end of first joint, the back light negative pole pad passes through the LEDK line of module FPC and is electrically connected with the LEDK end of first joint, the first bidirectional TVS pipe and the second bidirectional TVS pipe are equipped on the module FPC, one end of first bidirectional TVS pipe is electrically connected with the LEDK line, and the other end is grounded, one end of second bidirectional TVS pipe is electrically connected with the LEDA line, and the other end is grounded.

[0006] Further, the display module further includes a liquid crystal module, and the module FPC further includes a second joint, and the second joint is bound and connected to a single-layer area of the liquid crystal module.

[0007] Further, the first bidirectional TVS tube and the second bidirectional TVS tube are arranged in the component area of the module FPC.

[0008] With the above scheme, the beneficial effects of the utility model lie in that: by arranging the grounded bidirectional TVS tubes in the LEDA line and the LEDK line of the module FPC, the static electricity can be rapidly conducted to the ground end through the bidirectional TVS tubes when facing the static electricity, good static electricity protection effect can be achieved, the LED lamp at the rear end of the backlight module can be protected, and the ESD interference prevention performance and product quality of the display module product can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a circuit diagram of the first joint of an embodiment of the utility model.

[0010] Figure 2 It is a circuit diagram of the first bidirectional TVS tube and the second bidirectional TVS tube of an embodiment of the utility model. DETAILED DESCRIPTION

[0011] The utility model will be explained in detail in combination with the drawings and specific embodiments.

[0012] Please refer to Figure 1 and Figure 2 In the embodiment, the utility model provides a display module for preventing ESD interference problem of backlight, including: backlight module and module FPC, the module FPC includes backlight pad area and first joint, the first joint is used for connecting the mainboard of electronic equipment, the backlight pad area includes one backlight anode pad and a plurality of backlight cathode pads, the backlight anode pad passes through the LEDA line of the module FPC and is electrically connected with the LEDA end of the first joint, the backlight cathode pad passes through the LEDK line of the module FPC and is electrically connected with the LEDK end of the first joint, the component area of the module FPC is equipped with first bidirectional TVS tube D1 and second bidirectional TVS tube D2, one end of the first bidirectional TVS tube D1 is electrically connected with the LEDK line, and the other end is grounded. One end of the second bidirectional TVS tube D2 is electrically connected with the LEDA line, and the other end is grounded. In the scheme, by arranging the first bidirectional TVS tube D1 and the second bidirectional TVS tube D2 on the LEDK line and the LEDA line of the module FPC, when static electricity occurs, the static electricity conducted by the mainboard end of the electronic equipment can be conducted to the ground end through the first bidirectional TVS tube D1 and the second bidirectional TVS tube D2 respectively when passing through the LEDK line and the LEDA line, and the influence on the LED lamp at the rear end is avoided.

[0013] Further, the display module further comprises a liquid crystal module, and the module FPC further comprises a second joint which is connected to a single-layer area of the liquid crystal module by binding.

[0014] To sum up, the present application can realize good electrostatic protection effect by setting the bidirectional TVS tube of the LEDA line and the LEDK line of the module FPC to ground, and can protect the LED lamp at the back end of the backlight module, and can improve the ESD interference prevention performance and product quality of the display module product.

[0015] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A display module for preventing ESD interference problem of backlight, characterized in that, The application relates to a backlight module and a module FPC, wherein the module FPC comprises a backlight pad area and a first joint, the first joint is used for connecting a mainboard of an electronic device, the backlight pad area comprises one backlight positive pad and a plurality of backlight negative pads, the backlight positive pad is electrically connected with the LEDA end of the first joint through the LEDA line of the module FPC, the backlight negative pads are electrically connected with the LEDK end of the first joint through the LEDK line of the module FPC, the module FPC is provided with a first bidirectional TVS tube and a second bidirectional TVS tube, one end of the first bidirectional TVS tube is electrically connected with the LEDK line, and the other end is grounded, one end of the second bidirectional TVS tube is electrically connected with the LEDA line, and the other end is grounded. The application further relates to a liquid crystal module, and the module FPC further comprises a second joint which is bound and connected to the single-layer area of the liquid crystal module.

2. The display module of claim 1, wherein the display module is configured to prevent the occurrence of ESD interference problem. The first bidirectional TVS tube and the second bidirectional TVS tube are arranged in the component area of the module FPC. 3.The display module of claim 1 or 2, wherein, ​

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