CN204166236U - A kind of LCM against electromagnetic interference - Google Patents

Abstract

The utility model relates to the technical field of LCM, in particular to an anti-electromagnetic interference LCM, which comprises an LCM main body, wherein the top of the LCM main body is clamped with an upper metal frame, the bottom of the LCM main body is clamped with a lower metal frame, and the LCM main body comprises an upper polaroid, a liquid crystal display device, a lower polaroid, a light intensifying layer, a diffusion sheet, a light guide plate and a reflector sheet which are sequentially stacked from top to bottom; the front end of the LCM main body is provided with an FPC (flexible printed circuit) cable for transmitting data signals with the outside, and the front surface and the back surface of the FPC cable are covered with electromagnetic films. Therefore, the utility model discloses all cover the electromagnetic film at the front of FPC winding displacement, the back, make the FPC winding displacement also can shield external signal interference, improve the anti-electromagnetic interference effect of FPC winding displacement promptly to improve LCM's anti-electromagnetic interference effect, guarantee LCM's job stabilization nature and display effect.

Description

A kind of LCM against electromagnetic interference

technical field

The utility model relates to the technical field of LCM (English: Liquid Crystal Module, Chinese name: liquid crystal module, liquid crystal display module or liquid crystal display assembly), in particular to an anti-electromagnetic interference (Electromagnetic Interference, EMI for short) LCM.

Background technique

Generally speaking, LCM refers to the assembly of liquid crystal display devices, connectors, control and drive integrated circuits, circuit boards, backlight sources, structural parts, etc. LCM is a high-tech basic component. As a display module of electronic products, it can be assembled with other components to form electronic products such as mobile phones and computers.

At present, a general LCM mainly includes an LCM main body. The upper metal frame (commonly known as: iron frame) is clamped on the top of the LCM main body, and the lower metal frame is clamped on the bottom of the LCM main body. The upper metal frame and the lower metal frame are used for protection. LCM subject. Among them, the LCM main body includes an upper polarizer, a liquid crystal display device (LCD, commonly known as liquid crystal glass), a lower polarizer, a brightness enhancement film, a diffusion sheet, a light guide plate, and a reflection sheet stacked sequentially from top to bottom. The light emitted by the LED of the side backlight module is converted into flat light; the reflector is used to reflect the light that hits the bottom to make full use of the light; the diffuser is used to diffuse the light to make the light even; The brightness of light emission; liquid crystal display devices, used for display; polarizers are used to form polarized light to image liquid crystal display devices.

Wherein, as shown in FIG. 1, the front end of the LCM main body 1' is provided with an FPC (i.e. flexible circuit board) cable 2' for transmitting data signals with the outside. However, the LCM in the prior art only relies on the upper metal frame, the lower metal frame and other components to resist electromagnetic interference on the LCM main body, while ignoring the anti-electromagnetic interference of the FPC cable, which makes the anti-electromagnetic interference effect of the LCM poor and affects The working stability and display effect of LCM.

Utility model content

The purpose of the utility model is to provide an anti-electromagnetic interference LCM for the deficiencies of the prior art, which improves the anti-electromagnetic interference effect of the FPC cable, thereby improving the anti-electromagnetic interference effect of the LCM, and ensuring the working stability of the LCM and display effect.

In order to achieve the above object, the utility model adopts the following technical solutions:

An anti-electromagnetic interference LCM, comprising an LCM main body, an upper metal frame is clamped on the top of the LCM main body, a lower metal frame is clamped on the bottom of the LCM main body, and the LCM main body includes sequentially stacked from top to bottom Upper polarizer, liquid crystal display device, lower polarizer, light-enhancing layer, diffusion sheet, light guide plate, reflector; the front end of the LCM main body is provided with an FPC cable for transmitting data signals with the outside, and the front of the FPC cable , The back is covered with electromagnetic film.

Wherein, the thickness of the upper polarizer and the thickness of the lower polarizer are both 0.215 mm.

Wherein, the brightness enhancement layer includes an upper brightness enhancement sheet and a lower brightness enhancement sheet, and the upper brightness enhancement sheet is stacked on the top end surface of the lower brightness enhancement sheet.

Wherein, the thickness of the upper brightness enhancement sheet and the thickness of the lower brightness enhancement sheet are both 0.1 mm.

Wherein, the thickness of the liquid crystal display device is 1 mm, the thickness of the diffusion sheet is 0.1 mm, the thickness of the light guide plate is 0.5 mm, and the thickness of the reflection sheet is 0.1 mm.

Wherein, the thickness of the upper metal frame and the thickness of the lower metal frame are both 0.2 mm.

The beneficial effect of the utility model is that: the utility model covers the front and the back of the FPC cable with an electromagnetic film, so that the FPC cable can also shield the external signal interference, that is, the anti-electromagnetic interference effect of the FPC cable is improved, thereby improving the anti-electromagnetic interference of the LCM. The electromagnetic interference effect ensures the working stability and display effect of the LCM.

Description of drawings

FIG. 1 is a front view of a prior art LCM.

Fig. 2 is a front view of the LCM of the present invention.

Fig. 3 is a rear view of the LCM of the present invention.

FIG. 4 is a cross-sectional view along line A-A of FIG. 2 .

FIG. 5 is an enlarged schematic view of point B in FIG. 4 .

In Figures 2 to 5 include:

1—LCM main body, 11—upper metal frame, 12—upper polarizer, 13—liquid crystal display device, 14—lower polarizer, 151—upper brightness enhancement film, 152—lower brightness enhancement film, 16— —diffusion sheet, 17—light guide plate, 18—reflector, 19—lower metal frame, 2—FPC cable, 3—electromagnetic film.

Detailed ways

In order to describe the technical solution of the utility model in detail, the technical solution of the utility model embodiment will be clearly and completely described below in conjunction with the accompanying drawings of the utility model embodiment. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Please refer to FIGS. 2-5 , the anti-electromagnetic interference LCM of the present invention includes an LCM main body 1 . The top of the LCM main body 1 is clamped with an upper metal frame 11, and the bottom of the LCM main body 1 is clamped with a lower metal frame 19. The LCM main body 1 includes an upper polarizer 12, a liquid crystal display device 13, and a lower polarizer stacked sequentially from top to bottom. 14. Brightening layer, diffusion sheet 16, light guide plate 17, reflective sheet 18.

Among them, the front end of the LCM main body 1 is provided with an FPC cable 2 for transmitting data signals with the outside, and the front and back of the FPC cable 2 are covered with an electromagnetic film 3, so that the FPC cable 2 can also shield external signal interference, that is, improve The anti-electromagnetic interference effect of the FPC cable 2 improves the anti-electromagnetic interference effect of the LCM and ensures the working stability and display effect of the LCM. Of course, the plug-in portion at the front end of the FPC cable 2 does not cover the electromagnetic film 3 so as not to affect the connection between the FPC cable 2 and external devices. The electromagnetic film 3 covering the FPC cable 2 can be black, and can be press-bonded to the front and back of the FPC cable 2 by machine equipment.

Preferably, the brightness enhancement layer includes an upper brightness enhancement sheet 151 and a lower brightness enhancement sheet 152, and the upper brightness enhancement sheet 151 is stacked on the top end surface of the lower brightness enhancement sheet 152, so that the brightness enhancement layer has two brightness enhancement sheets, thereby improving the brightness of the LCM.

Preferably, the thickness of the upper polarizer 12 and the thickness of the lower polarizer 14 are both 0.215 mm; the thickness of the upper brightness enhancement sheet 151 and the thickness of the lower brightness enhancement sheet 152 are both 0.1 millimeter; the thickness of the liquid crystal display device 13 is 1 millimeter, and the diffusion The thickness of the sheet 16 is 0.1 mm, the thickness of the light guide plate 17 is 0.5 mm, and the thickness of the reflection sheet 18 is 0.1 mm; the thickness of the upper metal frame 11 and the thickness of the lower metal frame 19 are both 0.2 mm. Such a thickness is convenient for production without making the electronic product too thick.

Compared with the LCM of the prior art, the utility model covers the electromagnetic film 3 on the front and the back of the FPC cable 2. It is proved by experiments that the application of the LCD screen of the utility model has better anti-electromagnetic interference effect, and the working stability and The display effect is also better.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art Personnel should understand that any modification or equivalent replacement of the technical solution of the utility model belongs to the protection scope of the utility model.

Claims (6)

1. An anti-electromagnetic interference LCM, comprising an LCM main body, the top of the LCM main body is clamped with an upper metal frame, and the bottom of the LCM main body is clamped with a lower metal frame, and the LCM main body includes sequentially from top to bottom Laminated upper polarizer, liquid crystal display device, lower polarizer, light-enhancing layer, diffusion sheet, light guide plate, reflector; the front end of the LCM main body is provided with an FPC cable for transmitting data signals with the outside, which is characterized in that: Both the front and the back of the FPC cable are covered with an electromagnetic film. 2. The anti-electromagnetic interference LCM according to claim 1, characterized in that: the thickness of the upper polarizer and the thickness of the lower polarizer are both 0.215 mm. 3. The anti-electromagnetic interference LCM according to claim 1 or 2, wherein the brightness enhancement layer comprises an upper brightness enhancement sheet and a lower brightness enhancement sheet, and the upper brightness enhancement sheet is stacked on the top end surface of the lower brightness enhancement sheet. 4. The anti-electromagnetic interference LCM according to claim 3, characterized in that: the thickness of the upper brightness enhancement sheet and the thickness of the lower brightness enhancement sheet are both 0.1 mm. 5. The anti-electromagnetic interference LCM according to claim 4, characterized in that: the thickness of the liquid crystal display device is 1 mm, the thickness of the diffusion sheet is 0.1 mm, and the thickness of the light guide plate is 0.5 mm, The reflective sheet has a thickness of 0.1 mm. 6 . The anti-electromagnetic interference LCM according to claim 5 , wherein the thickness of the upper metal frame and the thickness of the lower metal frame are both 0.2 mm.