CN217741969U - Anti-static device and backlight module - Google Patents

Abstract

The utility model relates to a liquid crystal display technology field specifically discloses an antistatic device and backlight unit. The device comprises an upper metal frame and a lower metal frame; the upper metal frame is provided with a mounting groove, and the side wall of the mounting groove is provided with a plurality of buckling grooves at intervals; the side surface of the lower metal frame is convexly provided with clamping convex plates, the clamping convex plates and the clamping grooves are in the same quantity and are clamped in a one-to-one correspondence manner, and the rear plate surface of each clamping convex plate is pressed against the groove wall of each clamping groove; the surface part of metal frame covers down has glues the frame, glues the frame epirelief and is equipped with the sloping block, and the sloping block rigid coupling is in the preceding face of joint flange, along the direction of keeping away from the joint flange, and the sloping block inclines gradually towards the middle part of metal frame down. The improved structure of the device not only realizes the buckle connection between the upper metal frame and the lower metal frame, but also can realize the purpose of electric conduction through the contact between the upper metal frame and the lower metal frame, thereby smoothly discharging the static generated by the anti-static device.

Description

Anti-static device and backlight module

Technical Field

The utility model relates to a liquid crystal display technology field especially relates to an antistatic device and backlight unit.

Background

The backlight module is used as an important part of the display device, the reliability of the backlight module directly affects the quality of the display device, and particularly, the backlight module is applied to industrial and vehicle-mounted products, and the backlight module is required to have good shockproof capability and strength in long-time work and complex working environment.

In the prior art, the backlight module includes the following structure: the upper metal frame and the lower metal frame clamp the rubber frame in the middle for shock prevention, and the lower metal frame clamping hook is hung outwards in the rubber frame clamping groove; the hook of the rubber frame is clamped outwards in the clamping groove of the upper metal frame. Because the rubber frame is arranged between the upper metal frame and the lower metal frame, the static electricity on the surface of the upper metal frame needs to be grounded and released through other modes.

One common method for releasing static electricity is to apply a layer of conductive double-sided adhesive (the conductive double-sided adhesive is applied to the surface of the FPC in an extending manner, and is grounded through a grounding pad on the FPC) to the surface of a TFT (Thin Film Transistor) chip, and then apply a conductive foam adhesive to the conductive double-sided adhesive to contact and conduct grounding with the inner surface of an upper metal frame; the other method is to wrap the periphery or three sides of the module by using a conductive adhesive tape, connect and conduct the upper metal frame and the lower metal frame through the conductive adhesive tape, and enable the lower metal frame to be grounded through the shell or the mainboard to release static electricity.

The above method is complicated in process, and high in material cost and manufacturing cost (i.e., labor cost). Under the influence of the long service life of the terminal and the heat generated by the module, the conductive adhesive tape or the conductive foam adhesive tape can lose viscosity and fall off due to evaporation loss of moisture, so that the conductive capability of the TFT chip towards the metal frame is weakened or even completely lost, and the static electricity on the TFT chip cannot be effectively released under the above conditions, so that the TFT chip is easily damaged by electrostatic breakdown, and the phenomena of picture non-display or poor display and the like occur in the terminal use. Causing property loss of customers and potential safety hazard, and even causing casualty of personnel in serious cases.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an antistatic device and backlight unit to guarantee the electrostatic discharge ability of device.

To achieve the purpose, the utility model adopts the following technical proposal:

an antistatic device comprises an upper metal frame and a lower metal frame; the upper metal frame is provided with a mounting groove, and a plurality of buckling grooves are formed in the side wall of the mounting groove at intervals; clamping convex plates are convexly arranged on the side faces of the lower metal frame, the quantity of the clamping convex plates is the same as that of the clamping grooves, the clamping convex plates are correspondingly clamped with the clamping grooves one by one, and the rear plate faces of the clamping convex plates are pressed against the groove walls of the clamping grooves; the surface part of metal frame covers down has gluey frame, it is equipped with the sloping block to glue the frame epirelief, the sloping block rigid coupling in the preceding face of joint flange is along keeping away from the direction of joint flange, the sloping block orientation the middle part of metal frame slopes gradually down.

As a preferable technical solution of the antistatic device, the fastening groove penetrates through the inner sidewall of the upper metal frame and the outer sidewall of the upper metal frame.

As a preferred technical scheme of the anti-static device, the rubber frame is formed on the surface of the lower metal frame in an injection molding mode.

As the preferred technical scheme of the anti-static device, the material of the rubber frame is silica gel.

As a preferable technical scheme of the anti-static device, the upper metal frame and the lower metal frame are made of iron.

A backlight module comprises a screen module and the antistatic device, wherein a containing cavity is formed between the lower metal frame and the mounting groove, and the screen module is mounted in the containing cavity.

As a preferred technical scheme of the backlight module, the screen module comprises a light source part, a reflecting membrane, a light guide plate, a light guide assembly and a display assembly, and light rays emitted from the light source part sequentially pass through the light guide plate and the light guide assembly and are conveyed to the display assembly; the light guide assembly is fixedly connected to the front panel surface of the light guide plate, and the reflection film is clamped between the lower metal frame and the rear panel surface of the light guide plate.

As backlight unit's preferred technical scheme, it is equipped with the grip block to glue the frame epirelief, display module presss from both sides and locates the grip block with go up between the metal frame.

As a preferred technical scheme of the backlight module, the light guide assembly is fixedly connected to the rubber frame through a fixing strip.

As the preferable technical scheme of the backlight module, the part of the fixed adhesive strip connected with the rubber frame is clamped between the clamping block and the display assembly.

The utility model has the advantages that:

this antistatic device corresponds the design of buckle through multiunit buckle groove and joint flange, has realized the buckle of going up metal frame and metal frame down and has connected, has guaranteed the reliability of connecting and the efficiency of dismouting. The back plate surface of the clamping convex plate is tightly attached to the groove wall of the clamping groove, so that the clamping convex plate is electrically connected with the groove wall of the clamping groove, the lower metal frame is conducted through the shell of the backlight module or the whole mainboard, and static electricity is released. The rubber frame has the advantages that the rubber frame has a protection effect on the lower metal frame, the risk that the lower metal frame is subjected to rigid collision is reduced, and the service life of the lower metal frame is prolonged. The setting up of sloping block makes the joint flange easily promote to the buckle inslot, has reduced the risk that joint flange and buckle groove warp from this, has made things convenient for operating personnel to the equipment operation of metal frame down, has reduced this antistatic device's the equipment degree of difficulty. The structural improvement not only ensures the structural stability of the antistatic device, but also can smoothly complete the discharge operation of static electricity.

Drawings

Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a backlight module according to an embodiment of the present invention;

fig. 3 is a partially enlarged view of a in fig. 2.

In the figure:

100. fixing the adhesive tape; 200. an upper metal frame; 201. a fastening groove; 300. a rubber frame; 301. a sloping block; 302. A clamping block; 400. a lower metal frame; 401. clamping the convex plate; 500. a light source element; 600. a reflective membrane; 700. A light guide plate; 800. a light guide assembly; 810. a diffusion membrane; 820. a lower brightness enhancement film; 830. an upper brightness enhancement film; 900. A display component; 910. a liquid crystal screen; 920. a dust-proof layer; 930. and (4) preventing a film from being scratched.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1-3, the present embodiment provides a backlight module, which includes a screen module and an anti-static device, wherein a receiving cavity is formed by the mounting grooves of the lower metal frame 400 and the upper metal frame 200, and the screen module is mounted in the receiving cavity. The above structural design of the backlight module realizes effective storage of the screen module, avoids the situation that the screen module is separated from the anti-static device, reduces the risk that the screen module directly collides with the external environment, has compact structure, is simple and reliable, and simultaneously reduces the difficulty in dismounting the backlight module.

The backlight module can be applied to industrial and vehicle-mounted products, and can also be applied to double-sided display equipment such as supermarkets, ticket outlets and the like.

The embodiment also provides an antistatic device, which comprises an upper metal frame 200 and a lower metal frame 400; the upper metal frame 200 is provided with a mounting groove, and the side wall of the mounting groove is provided with a plurality of buckling grooves 201 at intervals; the side surface of the lower metal frame 400 is convexly provided with clamping convex plates 401, the clamping convex plates 401 and the clamping grooves 201 are in the same quantity and are correspondingly clamped one by one, and the rear plate surface of each clamping convex plate 401 is pressed against the groove wall of each clamping groove 201; the surface part of metal frame 400 has down and has covered gluey frame 300, and gluey frame 300 epirelief is equipped with sloping block 301, and sloping block 301 rigid coupling is in the preceding face of joint flange 401, along the direction of keeping away from joint flange 401, and sloping block 301 inclines gradually towards the middle part of metal frame 400 down.

This antistatic device has realized the buckle of last metal frame 200 and lower metal frame 400 through the design that multiunit buckle groove 201 corresponds the buckle with joint flange 401 and is connected, has guaranteed the reliability of connecting and the efficiency of dismouting. By means of the close fit between the rear plate surface of the clamping convex plate 401 and the groove wall of the clamping groove 201, the clamping convex plate 401 can be electrically connected with the groove wall of the clamping groove 201, so that the lower metal frame 400 is conducted through a shell of the backlight module or a whole mainboard, and the static electricity is released. The rubber frame 300 has the protection effect on the lower metal frame 400, the risk of rigid collision of the lower metal frame 400 is reduced, and the service life of the lower metal frame 400 is prolonged. The setting of sloping block 301 makes joint flange 401 easily promote to buckle groove 201 in, has reduced the risk that joint flange 401 and buckle groove 201 warp from this, has made things convenient for operating personnel to the equipment operation of metal frame 400 down, has reduced this antistatic device's the equipment degree of difficulty. The structural improvement not only ensures the structural stability of the antistatic device, but also can smoothly complete the discharge operation of static electricity.

This antistatic device does not select for use conducting resin or conductive bubble isotructure, goes up metal frame 200 and metal frame 400 down through buckle structure realization, has reduced this antistatic device's material cost and manufacturing cost from this.

Specifically, the upper metal frame 200 is grounded. This allows the static electricity generated by the static electricity preventing apparatus to be smoothly discharged to the external environment.

The design that upper metal frame 200 and lower metal frame 400 are connected with ground for the static on upper metal frame 200 and lower metal frame 400 can release, because the electric conductivity of the two can not weaken or become invalid along with the lapse of time, and then reduced avoided the TFT chip because of being punctured the impaired terminal display module that causes by the static and do not show or the bad condition of demonstration.

Preferably, the screen module presss from both sides and locates between the tank bottom of mounting groove and lower metal frame 400, through the design that screen module and lower metal frame 400 contacted, can provide the driving force of keeping away from the mounting groove direction to metal frame 400 down, and above thrust makes lower metal frame 400 stop and supports to press in the back face of joint flange 401 and the groove wall of buckle groove 201 to the inseparable laminating of the two has been ensured.

In the present embodiment, the locking groove 201 penetrates the inner wall of the upper metal frame 200 and the outer wall of the upper metal frame 200. The arrangement that the buckle groove 201 penetrates through the upper metal frame 200 reduces the production difficulty of the buckle groove 201, reduces the risk of deformation of the upper metal frame 200, and when the clamping device is assembled or maintained, an operator can determine the relative position of the buckle groove 201 and the clamping convex plate 401 through direct observation and can apply external force to process the deformation of the upper metal frame 200 and the lower metal frame 400. The effect that metal frame 200 and lower metal frame 400 buckle are connected has been guaranteed in above-mentioned setting, has reduced this antistatic device's maintenance frequency.

Preferably, the rubber frame 300 is injection molded on the surface of the lower metal frame 400. The injection molding has the advantages of high production speed, high efficiency, accurate size and convenience for large-scale production.

Specifically, the rubber frame 300 is made of silica gel. The silica gel has the advantages of high mechanical property, good thermal stability and stable chemical property, and can ensure that the prepared structure is strong in stability and not easy to damage when being used as an injection molding material.

In this embodiment, the lower metal frame 400 is placed into the cavity of the plastic mold after being processed, and the plastic liquid is injected into the cavity, the surface of the lower metal frame 400 is completely wrapped by the plastic liquid and integrated with the lower metal frame 400, and the plastic liquid is molded to obtain the plastic frame 300. The arrangement enables the surface of the lower metal frame 400 to be embedded into the rubber frame 300, thereby ensuring that the lower metal frame 400 and the rubber frame 300 are completely integrated and cannot be easily separated due to stress, and the overall strength of the lower metal frame 400 and the rubber frame 300 is multiplied.

In the present embodiment, the upper metal frame 200 and the lower metal frame 400 are made of iron. The iron metal frame has stable structure, convenient processing and low production cost.

Preferably, the screen module includes a light source 500, a reflective film 600, a light guide plate 700, a light guide assembly 800, and a display assembly 900, and light emitted from the light source 500 passes through the light guide plate 700 and the light guide assembly 800 in order and is transmitted to the display assembly 900; the light guide assembly 800 is fixedly connected to the front panel surface of the light guide panel 700, and the reflective film 600 is sandwiched between the lower metal frame 400 and the rear panel surface of the light guide panel 700.

Specifically, the light source 500 is an LED light bar, and the LED light bar is fixedly connected to the light source 500. The light guide assembly 800 includes a diffusion film 810, a lower brightness enhancement film 820, and an upper brightness enhancement film 830, which are sequentially attached to the front plate surface of the light guide plate 700.

The display window has been seted up to the tank bottom of mounting groove, and the display window is sheltered from to the face that display module 900 kept away from light guide plate 700, and display module 900 includes LCD screen 910, pastes in proper order on the face that LCD screen 910 kept away from light guide plate 700 and is equipped with dust barrier 920 and prevent scraping film 930, prevents scraping film 930 and external environment and contacts.

In this embodiment, the light source 500, the reflective film 600, the light guide plate 700, the light guide assembly 800, the display assembly 900, the diffusion film 810, the lower brightness enhancement film 820, the upper brightness enhancement film 830, the liquid crystal panel 910, the dust-proof layer 920, and the scratch-proof film 930 are all conventional in the art, and the arrangement manner and the working principle thereof are common knowledge in the art, and are well known by those skilled in the art, and thus are not described herein.

Preferably, the rubber frame 300 is provided with a clamping block 302 protruding upward, and the display module 900 is clamped between the clamping block 302 and the upper metal frame 200. The accurate positioning of the display assembly 900 in the containing cavity is ensured by the design, the risk that the display assembly 900 deviates from the position is reduced, and the stable work of the backlight module is guaranteed.

Further, the light guide assembly 800 is fixed to the rubber frame 300 by the fixing strip 100. The arrangement of the fixing strip 100 realizes the accurate positioning of the light guide assembly 800 in the receiving cavity, and ensures the stable imaging of the display assembly 900.

Still further, the portion of the fixing tape 100 connected to the rubber frame 300 is sandwiched between the clamping block 302 and the display module 900. Specifically, the fixing tape 100 contacts with the panel surface of the liquid crystal panel 910 close to the light guide plate 700, and the fixing tape 100 is black glue. The accurate connection of fixed welt 100 on gluey frame 300 has been ensured to setting up more than, has reduced the risk that fixed welt 100 drops, and the further guarantee of above design is to light guide assembly 800's location effect.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. An antistatic device, comprising:

the clamping device comprises an upper metal frame (200), wherein the upper metal frame (200) is provided with a mounting groove, and a plurality of clamping grooves (201) are arranged on the side wall of the mounting groove at intervals;

the clamping device comprises a lower metal frame (400), wherein clamping convex plates (401) are convexly arranged on the side surfaces of the lower metal frame (400), the clamping convex plates (401) are in the same quantity with the clamping grooves (201) and are correspondingly clamped one by one, and the rear plate surface of each clamping convex plate (401) is abutted against the groove wall of each clamping groove (201);

the surface part of lower metal frame (400) covers has gluey frame (300), it is equipped with sloping block (301) to glue frame (300) epirelief, sloping block (301) rigid coupling in the preceding face of joint flange (401), along keeping away from the direction of joint flange (401), sloping block (301) orientation the middle part of lower metal frame (400) slopes gradually.

2. The anti-static device according to claim 1, wherein the snap groove (201) penetrates through an inner sidewall of the upper metal frame (200) and an outer sidewall of the upper metal frame (200).

3. The anti-static device according to claim 1, wherein the rubber frame (300) is injection molded on the surface of the lower metal frame (400).

4. The antistatic device according to claim 3, wherein the material of the rubber frame (300) is silica gel.

5. The antistatic device according to any one of claims 1 to 4, wherein the upper metal frame (200) and the lower metal frame (400) are made of iron.

6. A backlight module comprising a screen module and the antistatic device as claimed in any one of claims 1 to 5, wherein the lower metal frame (400) and the mounting groove form a receiving cavity, and the screen module is mounted in the receiving cavity.

7. The backlight module according to claim 6, wherein the screen module comprises a light source (500), a reflective film (600), a light guide plate (700), a light guide assembly (800) and a display assembly (900), and light emitted from the light source (500) passes through the light guide plate (700) and the light guide assembly (800) in sequence and is transmitted to the display assembly (900); the light guide assembly (800) is fixedly connected to the front plate surface of the light guide plate (700), and the reflection film (600) is clamped between the lower metal frame (400) and the rear plate surface of the light guide plate (700).

8. The backlight module as claimed in claim 7, wherein a clamping block (302) is protruded from the plastic frame (300), and the display assembly (900) is sandwiched between the clamping block (302) and the upper metal frame (200).

9. The backlight module according to claim 8, wherein the light guide assembly (800) is fixed to the frame (300) by a fixing strip (100).

10. The backlight module according to claim 9, wherein the connection portion between the fixing strip (100) and the frame (300) is sandwiched between the clamping block (302) and the display module (900).

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