Display module with high EMC performance

Abstract

The utility model discloses a display module with high EMC (Electro Magnetic Compatibility) performance, which comprises a liquid crystal panel, a driving IC (Integrated Circuit) and a main screen FPC (Flexible Printed Circuit) are bound and connected on the liquid crystal panel, a first shielding layer is adhered on the surface of the driving IC, and a second shielding layer is adhered on the surface of the main screen FPC. The display module has relatively high EMC (Electro Magnetic Compatibility) performance.

Description

Technical Field

[0001] The utility model relates to display technology, in particular to a display module with high EMC performance. Background Art

[0002] Electromagnetic compatibility (EMC) refers to the ability of a device or system to work properly in its electromagnetic environment without causing interference to other devices or systems. Specifically, EMC includes two aspects: electromagnetic interference (EMI): refers to the electromagnetic noise generated by the device when performing its function, which should not interfere with other systems; electromagnetic tolerance (EMS): refers to the ability of the device to resist interference from the surrounding electromagnetic environment and maintain normal operation when performing its function. Electromagnetic compatibility is an important part of the safety of electronic and electrical products. Products must comply with electromagnetic compatibility regulations when leaving the factory to ensure that they do not have adverse effects on other equipment or the environment.

[0003] The driver IC and main screen FPC of the display module are mainly used for receiving and transmitting display signals. Improving the EMC performance of these two components is of great significance to improving the overall EMC performance of the display module. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a display module with higher EMC performance.

[0005] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0006] A display module with high EMC performance comprises a liquid crystal panel, a driving IC and a main screen FPC are bound and connected to the liquid crystal panel, a first shielding layer is attached to the surface of the driving IC, and a second shielding layer is attached to the surface of the main screen FPC.

[0007] Furthermore, the first shielding layer also extends and adheres to a single substrate area of ​​the liquid crystal panel located around the driver IC.

[0008] Furthermore, the first shielding layer also extends and adheres to the main screen FPC.

[0009] Furthermore, the liquid crystal panel includes an upper polarizer and an upper substrate, the first shielding layer also extends and adheres to the surface of the upper substrate, and the edge of the first shielding layer is flush with the edge of the upper polarizer.

[0010] Furthermore, the main screen FPC includes a main body, a main screen connection part and a main board connection part, and the main screen connection part and the main board connection part are respectively connected to the sides of the main body; the second shielding layer at least covers the main body of the main screen FPC.

[0011] Furthermore, the second shielding layer also extends and adheres to at least one of the main screen connecting portion and the mainboard connecting portion of the main screen FPC.

[0012] Furthermore, the display module also includes a backlight module, the liquid crystal panel is arranged on the light-emitting side of the backlight module, and the backlight module includes a backlight iron frame; the first shielding layer and the second shielding layer are conductive materials, and are directly or indirectly connected to the backlight iron frame.

[0013] Furthermore, after the main body of the main screen FPC is bent onto the lower surface of the backlight module, it is adhered and fixed to the backlight module through the second shielding layer.

[0014] Furthermore, the second shielding layer is attached to the backlight iron frame to be directly connected to the backlight iron frame; the first shielding layer is attached to the second shielding layer to be indirectly connected to the backlight iron frame.

[0015] Furthermore, the first shielding layer is aluminum foil.

[0016] The utility model has the following beneficial effects: the display module of the utility model respectively adheres the first shielding layer and the second shielding layer to the driver IC and the main screen FPC of the liquid crystal panel, and uses the first shielding layer and the second shielding layer to respectively isolate the electromagnetic signals of the driver IC and the main screen FPC, thereby preventing the electromagnetic signals generated by the driver IC and the main screen FPC when working from interfering with nearby electronic components, and also preventing the driver IC and the main screen FPC from being interfered by electromagnetic signals generated by nearby electronic components when working, thereby improving the overall EMC performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front structural schematic diagram of the display module provided by the utility model.

[0018] Figure 2 This is a front structural schematic diagram of a liquid crystal panel and a first shielding layer in a display module provided by the utility model.

[0019] Figure 3 This is a schematic diagram of the stacking structure of liquid crystal panels in the display module provided by the utility model.

[0020] Figure 4 This is a schematic diagram of the back structure of another display module provided by the utility model.

[0021] Figure 5 This is a schematic diagram of the stacking structure of another display module provided by the utility model. DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Embodiment 1

[0027] like Figure 1-3 As shown, a display module with high EMC performance includes a liquid crystal panel 10, to which a driver IC 11 and a main screen FPC 12 are bound and connected, a first shielding layer 30 is attached to the surface of the driver IC 11, and a second shielding layer 40 is attached to the surface of the main screen FPC 12.

[0028] The display module of the utility model respectively adheres the first shielding layer 30 and the second shielding layer 40 to the driver IC 11 and the main screen FPC 12 of the liquid crystal panel 10, and uses the first shielding layer 30 and the second shielding layer 40 to isolate the electromagnetic signals of the driver IC 11 and the main screen FPC 12 respectively, so as to prevent the electromagnetic signals generated by the driver IC 11 and the main screen FPC 12 when working from interfering with nearby electronic components, and also prevent the driver IC 11 and the main screen FPC 12 from being interfered by the electromagnetic signals generated by nearby electronic components when working, thereby improving the overall EMC performance.

[0029] The main screen FPC 12 is used to transmit control signals between the driver IC 11 and an external mainboard module, and the driver IC 11 is used to output corresponding drive signals to the liquid crystal panel 10 according to the received control signals.

[0030] In order to ensure the EMC performance of the driver IC 11, the first shielding layer 30 should cover the upper surface and four side surfaces of the driver IC 11 as much as possible. In order to improve the bonding stability of the first shielding layer 30, the first shielding layer 30 can be appropriately extended to be bonded to the single substrate area of ​​the liquid crystal panel 10 located around the driver IC 11, and even further extended to be bonded to the main screen FPC 12.

[0031] The liquid crystal panel 10 includes an upper polarizer 13, an upper substrate 14, a lower substrate 15 and a lower polarizer 16 stacked in sequence from top to bottom. Compared with the upper substrate 14, the lower substrate 15 is larger in size and extends outside the upper substrate 14 on one side to form a single substrate area for binding the driver IC 11 and the main screen FPC 12.

[0032] Optimally, the first shielding layer 30 can further extend upward to fit on the surface of the upper substrate 14 , and the edge of the first shielding layer 30 is flush with the edge of the upper polarizer 13 .

[0033] The main screen FPC 12 includes a main body 121, a main screen connection part 122 and a main board connection part 123, wherein the main screen connection part 122 and the main board connection part 123 are respectively connected to the side of the main body 121; the main screen FPC 12 is bound and connected to the liquid crystal panel 10 through the main screen connection part 122, and the main screen FPC 12 is plug-connected to the main board module through the main board connection part 123. A plurality of resistors and capacitors 124 are arranged on the main body 121 of the main screen FPC 12 to form a filter circuit of the liquid crystal panel 10, etc.

[0034] The second shielding layer 40 at least covers the main body portion 121 of the main screen FPC 12 to electromagnetically isolate the resistor and capacitor components 124 on the main body portion 121 .

[0035] In order to ensure the EMC performance of the main screen FPC 12 and improve the fitting stability of the second shielding layer 40 , the second shielding layer 40 may be further extended to fit on at least one of the main screen connection portion 122 and the mainboard connection portion 123 of the main screen FPC 12 .

[0036] When the first shielding layer 30 and the second shielding layer 40 both extend onto the main screen connecting portion 122 of the main screen FPC 12 , the first shielding layer 30 and the second shielding layer 40 are stacked on the main screen connecting portion 122 , with the first shielding layer 30 being located at the bottom and the second shielding layer 40 being located at the top.

[0037] like Figure 4 and 5 As shown, the display module also includes a backlight module 20, and the liquid crystal panel 10 is arranged on the light-emitting side of the backlight module 20; the backlight module 20 includes accessories such as a backlight iron frame 21, a backlight light bar 23, a light guide plate 22 and an optical film 24, and the accessories such as the backlight light bar 23, the light guide plate 22 and the optical film 24 are all arranged in the backlight iron frame 21, the backlight light bar 23 is located on the light incident surface of the light guide plate 22, and the optical film 24 is located on the light emitting surface of the light guide plate 22.

[0038] After the main body 121 of the main screen FPC 12 is bent onto the lower surface of the backlight module 20 , it is adhered and fixed to the backlight module 20 through the second shielding layer 40 , so that the mainboard connecting portion 123 is plugged and connected to the mainboard module on the lower surface of the backlight module 20 .

[0039] The first shielding layer 30 and the second shielding layer 40 are made of conductive materials and are directly or indirectly connected to the backlight iron frame 21 to be grounded through the backlight iron frame 21 .

[0040] In this embodiment, the second shielding layer 40 is attached to the backlight iron frame 21 to be directly connected to the backlight iron frame 21 ; the first shielding layer 30 is attached to the second shielding layer 40 to be indirectly connected to the backlight iron frame 21 .

[0041] Preferably, the first shielding layer 30 and the second shielding layer 40 may be, but are not limited to, aluminum foil, and may be self-adhesive, or the bonding surface may be provided with conductive glue to achieve bonding with the driver IC 11 and the main screen FPC 12, etc.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A display module with high EMC performance, comprising a liquid crystal panel, to which a driver IC and a main screen FPC are bound and connected, characterized in that: A first shielding layer is attached to the surface of the driver IC, and a second shielding layer is attached to the surface of the main screen FPC.

2. The display module according to claim 1, characterized in that: The first shielding layer also extends and adheres to a single substrate area of ​​the liquid crystal panel located around the driver IC.

3. The display module according to claim 1, characterized in that: The first shielding layer also extends and adheres to the main screen FPC.

4. The display module according to claim 1, characterized in that: The liquid crystal panel includes an upper polarizer and an upper substrate. The first shielding layer also extends and adheres to the surface of the upper substrate, and an edge of the first shielding layer is flush with an edge of the upper polarizer.

5. The display module according to claim 1, characterized in that: The main screen FPC includes a main body, a main screen connection part and a main board connection part, wherein the main screen connection part and the main board connection part are respectively connected to the sides of the main body; the second shielding layer at least covers the main body of the main screen FPC.

6. The display module according to claim 5, characterized in that: The second shielding layer also extends and adheres to at least one of the main screen connecting portion and the mainboard connecting portion of the main screen FPC.

7. The display module according to claim 1, characterized in that: The display module also includes a backlight module. The liquid crystal panel is arranged on the light-emitting side of the backlight module. The backlight module includes a backlight iron frame. The first shielding layer and the second shielding layer are conductive materials and are directly or indirectly connected to the backlight iron frame.

8. The display module according to claim 7, characterized in that: After the main body of the main screen FPC is bent onto the lower surface of the backlight module, it is adhered and fixed to the backlight module via the second shielding layer.

9. The display module according to claim 7 or 8, characterized in that: The second shielding layer is attached to the backlight iron frame to be directly connected to the backlight iron frame; the first shielding layer is attached to the second shielding layer to be indirectly connected to the backlight iron frame.

10. The display module according to claim 1, characterized in that: The first shielding layer is aluminum foil.

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