CN210323686U

CN210323686U - Liquid crystal display backlight module

Info

Publication number: CN210323686U
Application number: CN201920988999.3U
Authority: CN
Inventors: 江雪萍; 方雷锋
Original assignee: Jiangxi Lianchuang Electronic Co Ltd
Current assignee: Hubei Lianxin Display Technology Co.,Ltd.
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-04-14
Anticipated expiration: 2029-06-27

Abstract

The utility model relates to a liquid crystal display backlight unit, which comprises a cover plate, a sensor, go up the polaroid, liquid crystal display panel and lower polaroid, one side of the lower surface of polaroid still is equipped with light guide plate and reflectance coating in proper order down, and locate the gluey iron in a poor light of reflectance coating lower surface, it is equipped with driver IC and module FPC to glue at the upper surface of liquid crystal display panel, the outside cladding at driver IC has conductive copper foil, conductive copper foil and module FPC's copper leakage electric connection, and module FPC and gluey iron in a poor light electric connection, still be equipped with in a poor light shading glue and FPC in a poor light at module FPC's lower surface in proper order, FPC in a poor light glues and veneer mutually with the light guide plate through the lamp, be equipped with the LED lamp in the bottom of light guide plate, module FPC and FPC in a. The utility model provides a liquid crystal display backlight unit has good anti ESD ability, has improved product quality.

Description

Liquid crystal display backlight module

Technical Field

The utility model relates to a liquid crystal display equipment technical field, in particular to liquid crystal display backlight unit.

Background

With the increasing popularity of various consumer electronic products, users have increasingly high requirements for the reliability of the electronic products. Meanwhile, the display screens of electronic products are also developing towards the trend of large screen, ultra-thin, narrow frame, high definition and high reliability. Electronic products should still work normally under various severe conditions to meet the reliability requirements of users for the electronic products, especially the requirements on the anti-ESD (Electro-Static discharge) performance of the display screen.

At present, the ESD performance requirements of manufacturers on the market are higher and higher, from +/-8 kv to +/-10 kv to +/-12 k and even to +/-15 kv. Since an LCM (liquid crystal display Module) Module is easily damaged by ESD, manufacturers are continuously trying to improve the ESD resistance of electronic products to improve the reliability of the display screen through various techniques. For example, an ESD enhanced IC (Integrated Circuit) or an ESD enhanced LCD (Liquid crystal display) is used, and various methods are used to improve the ESD resistance of the module, so as to achieve a design concept of high reliability and high ESD resistance, thereby meeting the quality requirements of the current consumers for electronic products.

However, the method for improving the ESD resistance of the display screen has high requirements on cost and technology, so that design resources are wasted, the cost is increased, the technical difficulty is more complicated, and the method still cannot effectively improve the ESD resistance of the display screen.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model discloses a for solve current liquid crystal display module, its anti ESD performance is not strong problem.

The utility model provides a liquid crystal display backlight module, wherein, including the apron, locate the sensor of apron lower surface, locate in proper order on one side of the sensor lower surface upper polaroid, liquid crystal display panel and lower polaroid, still be equipped with light guide plate and reflectance coating in proper order on one side of the lower surface of lower polaroid, and locate the gluey iron in a poor light of reflectance coating lower surface;

the upper surface veneer of liquid crystal display panel is equipped with driver IC and module FPC the outside cladding of driver IC has conductive copper foil, conductive copper foil and module FPC's copper leakage electric connection, just module FPC with gluey indisputable electric connection in a poor light module FPC's lower surface still is equipped with in proper order and hides optical cement and FPC in a poor light, FPC in a poor light pass through the lamp glue with the light guide plate veneer mutually the bottom of light guide plate is equipped with the LED lamp, module FPC with FPC in a poor light is electric connection still be equipped with the TVS pipe on the module FPC.

The utility model provides a liquid crystal display backlight module, the medial surface at the rubber in a poor light is equipped with a reflective coating, and this reflective coating adopts the high reflectance and insulating 3M ESR, can prevent static from getting into in the LED lamp from the rubber, thereby prevent the static damage; on the other hand, as the backlight FPC is additionally provided with a GND pin and a GND window, the front side of the LED lamp is connected with the A, K circuit of the backlight FPC, the back side of the LED lamp is connected with the GND circuit of the backlight FPC, and the GND circuit surrounds the whole backlight FPC; in addition, the conductive particles are added on the backlight shading glue, and the backlight shading glue is contacted with the backlight rubber when the backlight FPC and the LCD have static electricity, the GND window of the backlight FPC is opened to leak copper, and the LCD can also discharge the static electricity to the backlight rubber through the contact of the shading glue and the backlight rubber; meanwhile, the TVS tube is arranged on the module FPC at a position corresponding to A, K pins of the backlight FPC, so that static electricity can be prevented from entering the backlight FPC end from the module FPC, and a good ESD (electro-static discharge) resistant effect can be realized.

The liquid crystal display backlight module is characterized in that the backlight rubber is positioned on the outermost side of the liquid crystal display backlight module, the reflecting film is attached to the backlight rubber, and an OCA (optically clear adhesive) layer is arranged between the pressure sensor and the upper polarizer.

The liquid crystal display backlight module is characterized in that a blue glue layer covers the upper surface of the drive IC, and a silicone glue layer is further arranged on the upper surface of the blue glue layer.

The liquid crystal display backlight module is characterized in that an upper intensifying film layer, a lower intensifying film layer and a diffusion film layer are sequentially arranged on the lower surface of the lower polarizer, the lower surface of the diffusion film layer is attached to the upper surface of the light guide plate, and the upper intensifying film layer, the lower intensifying film layer, the diffusion film layer and the light guide plate are all arranged inside the backlight rubber.

The liquid crystal display backlight module is characterized in that the top end of the module FPC is connected with the free tail end of the liquid crystal display panel in a gluing mode, the module FPC and the drive IC are arranged on the same surface of the liquid crystal display panel in a gluing mode, and the backlight FPC is arranged on one side of the lower surface of the module FPC.

The liquid crystal display backlight module is characterized in that the backlight shading glue is arranged between the liquid crystal display panel and the backlight FPC and is positioned at one end close to the module FPC, and the backlight shading glue is in gluing connection with the backlight FPC.

The liquid crystal display backlight module is characterized in that the LED lamp is arranged in the backlight rubber, the lower surface of the LED lamp is attached to the reflecting film, and the upper surface of the LED lamp is attached to the backlight FPC.

The liquid crystal display backlight module is characterized in that the backlight FPC is provided with an anode pin, a cathode pin and a GND pin, the back of the backlight FPC is provided with a GND window, the front connecting point of the LED lamp is electrically connected with the anode pin and the cathode pin, and the back connecting point of the LED lamp is electrically connected with the GND pin and the GND window.

The liquid crystal display backlight module comprises a positive electrode pin A1, a negative electrode pin K1 and a negative electrode pin K2, wherein the positive electrode pin K1 and the negative electrode pin K2 are located between the pin A1 and the pin GND.

The liquid crystal display backlight module is characterized in that a first TVS tube, a second TVS tube and a third TVS tube are further arranged on the FPC module, the first TVS tube is correspondingly connected with the A1 pin, the second TVS tube is correspondingly connected with the K1 pin, and the third TVS tube is correspondingly connected with the K2 pin.

Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure or may be learned by practice of the invention.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic view of an overall structure of a liquid crystal display backlight module according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a "V" portion of the LCD backlight module shown in FIG. 1;

fig. 3 is a side view of a liquid crystal display backlight module according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion "A" of the LCD backlight module shown in FIG. 3;

FIG. 5 is an enlarged view of the structure of the "N" portion of the structure of the liquid crystal display backlight module shown in FIG. 4;

FIG. 6 is an enlarged view of a portion "B" of the LCD backlight module shown in FIG. 3;

FIG. 7 is an enlarged view of the structure of the "M" portion of the structure of the liquid crystal display backlight module shown in FIG. 4;

FIG. 8 is a front view of the structure of the backlight FPC in the LCD backlight module shown in FIG. 1;

FIG. 9 is a rear view of the structure of the backlight FPC in the LCD backlight module shown in FIG. 1.

Description of the main symbols:

cover plate	11	Lamp glue	23
				Sensor with a sensor element	12	LED lamp	24
OCA glue line	13	Backlight shading glue	25
				Upper polarizer	14	Backlight FPC	26
Liquid crystal display panel having a plurality of pixel electrodes	15	Module FPC	27
				Lower polarizer	16	Conductive copper foil	28
Backlight rubber	17	Driver IC	29
				Upper brightening film layer	18	Silicone adhesive layer	30
Lower brightening film layer	19	TVS tube	31
				Diffusion film layer	20	Blue glue layer	32
Light guide plate	21	Liquid crystal display backlight module	100
				Reflective film	22	GND windowing	261

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The method for improving the ESD resistance of the display screen has higher requirements on cost and technology, so that the design resources are wasted, the cost is increased, the technical difficulty is more complicated, and the ESD resistance of the display screen cannot be effectively improved by the method.

In order to solve the above technical problem, the present invention provides a liquid crystal display backlight module 100, please refer to fig. 1 to fig. 9, to the utility model provides a liquid crystal display backlight module 100, including the apron 11, locate the sensor 12 of this apron 11 lower surface, locate last polaroid 14, liquid crystal display panel 15 and the lower polaroid 16 of sensor 12 lower surface one side in proper order. It is first to be agreed that, in the present invention, a direction toward one side of the cover plate 11 is referred to as an upper surface, and a direction away from the cover plate 11 is referred to as a lower surface.

Specifically, a light guide plate 21 and a reflective film 22 are further provided in this order on one side of the lower surface of the lower polarizer 16, and a backlight adhesive 17 is provided on the lower surface of the reflective film 22. In this embodiment, the reflective film 22 is a high reflectivity, insulating 3M ESR, which prevents static electricity from entering the LED lamp directly from the backlight rubber 17, thereby preventing static electricity from damaging the LED.

Referring to fig. 7, an upper light-enhancing film layer 18, a lower light-enhancing film layer 19 and a diffusion film layer 20 are sequentially disposed on the lower surface of the lower polarizer 16. Wherein, the lower surface of the diffusion film layer 20 is attached to the upper surface of the light guide plate 21. In addition, the backlight rubber 17 is provided in a closed structure, and the upper light-adding film layer 18, the lower light-adding film layer 19, the diffusion film layer 20 and the light guide plate 21 are all provided inside the backlight rubber 17.

As can be seen from fig. 7, the backlight rubber 17 is located at the outermost side of the liquid crystal display backlight module 100. The reflective film 22 is attached to the backlight rubber 17, and an OCA adhesive layer 13 is further disposed between the pressure sensor 12 and the upper polarizer 14.

In order to realize a good ESD resistance, in the present embodiment, a driver IC 29 and a module FPC 27 are bonded to the upper surface of the liquid crystal display panel 15. The exterior of the driver IC 29 is covered with a conductive copper foil 28, the conductive copper foil 28 is electrically connected with the copper leakage of the module FPC 27, and the module FPC 27 is electrically connected with the backlight rubber 17. It should be noted that the conductive copper foil 28 can transmit the static electricity in the driver IC 29 to the backlight rubber 17 through the module FPC 27 for static electricity discharge.

For the driver IC 29, the upper surface of the driver IC 29 is covered with the blue glue layer 32, and the blue glue layer 32 can prevent external static electricity from entering the driver IC. In addition, a silicone adhesive layer 30 is disposed on the upper surface of the blue adhesive layer 32. The silicone adhesive layer 30 serves primarily for adhesive attachment.

In the above-mentioned module FPC 27, the top end of the module FPC 27 is bonded to the free end of the liquid crystal display panel 15. The module FPC 27 and the driver IC 29 are both disposed on the same surface of the liquid crystal display panel 15 by gluing, that is, the module FPC 27 and the driver IC 29 are both fixed on the liquid crystal display panel 15 by bonding.

The backlight FPC26 is provided on one side of the lower surface of the module FPC 27. A backlight shading glue 25 is arranged between the backlight FPC26 and the module FPC 27 and is positioned at one end close to the module FPC 27, and the backlight shading glue 25 is in gluing connection with the backlight FPC 26. It should be noted that, the conductive particles are added on the backlight shading glue 25, and because the backlight shading glue 25 is in contact with the backlight rubber 17 at a position close to the module FPC 27, when static electricity exists on the backlight FPC26 and the LCD, the GND window of the backlight FPC26 leaks copper and the LCD can also leak the static electricity to the backlight rubber 17 through the contact between the backlight shading glue 25 and the backlight rubber 17.

The backlight FPC26 is bonded to the light guide plate 21 by a lamp adhesive 23, and an LED lamp 24 is provided at the bottom end of the light guide plate 21. As can be seen from fig. 7, the LED lamp 24 is disposed in the backlight rubber 17, and the lower surface of the LED lamp 24 is attached to the reflective film 22, and the upper surface of the LED lamp 24 is attached to the backlight FPC 26. In the present embodiment, the module FPC 27 and the backlight FPC26 are electrically connected. In order to enhance the ESD resistance, a TVS tube 31 is further provided on the module FPC 27.

In the backlight FPC26, the backlight FPC26 is provided with a positive electrode pin, a negative electrode pin, and a GND pin, and the back surface of the backlight FPC26 is provided with a GND window. Specifically, the positive electrode pin is an a1 pin, the negative electrode pin includes a K1 pin and a K2 pin, and the K1 pin and the K2 pin are located between the a1 pin and the GND pin.

The front connection point of the LED lamp 24 is electrically connected to the positive pin and the negative pin, and the back connection point of the LED lamp 24 is electrically connected to the GND pin and the GND window 261. That is, the front connection point of the LED lamp 24 is electrically connected to the pin a1, the pin K1, and the pin K2, and the back connection point of the LED lamp 24 is electrically connected to the pin GND and the GND window 261.

For the backlight FPC26, since the GND pin and the GND window are added to the backlight FPC26, the front side of the LED lamp 24 is connected to the A, K line of the backlight FPC26, the back side of the LED lamp 24 is connected to the GND line of the backlight FPC26, and the GND line surrounds the whole backlight FPC26, when static electricity enters the backlight FPC26, the static electricity can be quickly introduced to the module FPC 27 and the backlight adhesive 17 through the GND pin of the backlight FPC26 to discharge the static electricity.

In order to further improve the ESD resistance of the lcd backlight module, a first TVS tube, a second TVS tube and a third TVS tube are further disposed on the FPC 27. The first TVS tube is correspondingly connected with the A1 pin in the backlight FPC26, the second TVS tube is correspondingly connected with the K1 pin in the backlight FPC26, and the third TVS tube is correspondingly connected with the K2 pin in the backlight FPC 26. It can be understood that by providing the TVS tube as described above, static electricity can be prevented from entering from the module FPC 27 to the backlight FPC26 side.

The utility model provides a liquid crystal display backlight module, the medial surface at the glue iron 17 that is shaded is equipped with a reflective coating 22, this reflective coating 22 adopts the insulating 3M ESR of high reflectivity, can prevent that static from getting into LED lamp 24 from the glue iron to prevent the static damage; on the other hand, as the backlight FPC26 is additionally provided with a GND pin and a GND window, the front side of the LED lamp 24 is connected with the A, K circuit of the backlight FPC26, the back side of the LED lamp 24 is connected with the GND circuit of the backlight FPC26, and the GND circuit surrounds the whole backlight FPC26, when static electricity enters the backlight FPC26, the static electricity can be quickly LED into the module FPC 27 and the backlight rubber 17 through the GND pin of the backlight FPC26 so as to discharge the static electricity; in addition, the conductive particles are added on the backlight shading glue 25, because the backlight shading glue 25 is contacted with the backlight rubber 17 at the position close to the module FPC 27, when static electricity exists on the backlight FPC26 and the LCD, the GND window of the backlight FPC26 is opened to leak copper, and the LCD can also discharge the static electricity to the backlight rubber 17 through the contact of the backlight shading glue 25 and the backlight rubber 17; meanwhile, since the TVS tube 31 is disposed on the module FPC 27 at a position corresponding to the A, K pin of the backlight FPC26, static electricity can be prevented from entering the backlight FPC26 side from the module FPC 27, and thus a good ESD resistance effect can be achieved.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The liquid crystal display backlight module is characterized by comprising a cover plate, a sensor arranged on the lower surface of the cover plate, an upper polaroid, a liquid crystal display panel and a lower polaroid, wherein the upper polaroid, the liquid crystal display panel and the lower polaroid are sequentially arranged on one side of the lower surface of the sensor;

2. The liquid crystal display backlight module of claim 1, wherein the backlight rubber is located at the outermost side of the liquid crystal display backlight module, the reflective film is attached to the backlight rubber, and an OCA (optically clear adhesive) layer is arranged between the pressure sensor and the upper polarizer.

3. The liquid crystal display backlight module according to claim 1, wherein a blue glue layer covers the upper surface of the driving IC, and a silicone glue layer is further disposed on the upper surface of the blue glue layer.

4. The liquid crystal display backlight module according to claim 1, wherein an upper light enhancement film layer, a lower light enhancement film layer and a diffusion film layer are sequentially disposed on a lower surface of the lower polarizer, a lower surface of the diffusion film layer is attached to an upper surface of the light guide plate, and the upper light enhancement film layer, the lower light enhancement film layer, the diffusion film layer and the light guide plate are disposed inside the backlight rubber.

5. The liquid crystal display backlight module according to claim 1, wherein the top end of the module FPC is bonded to the free end of the liquid crystal display panel, the module FPC and the driver IC are both bonded to the same surface of the liquid crystal display panel, and the backlight FPC is disposed on one side of the lower surface of the module FPC.

6. The liquid crystal display backlight module according to claim 5, wherein the backlight shading glue is arranged between the liquid crystal display panel and the backlight FPC and is positioned at one end close to the module FPC, and the backlight shading glue and the backlight FPC are in gluing connection.

7. The liquid crystal display backlight module according to claim 1, wherein the LED lamp is disposed in the backlight rubber, and a lower surface of the LED lamp is attached to the reflective film, and an upper surface of the LED lamp is attached to the backlight FPC.

8. The liquid crystal display backlight module according to claim 1, wherein a positive pin, a negative pin and a GND pin are arranged on the backlight FPC, a GND window is arranged on the back surface of the backlight FPC, a front connection point of the LED lamp is electrically connected with the positive pin and the negative pin, and a back connection point of the LED lamp is electrically connected with the GND pin and the GND window.

9. The liquid crystal display backlight module of claim 8, wherein the positive pin is an A1 pin, the negative pin comprises a K1 pin and a K2 pin, and the K1 pin and the K2 pin are located between the A1 pin and the GND pin.

10. The liquid crystal display backlight module according to claim 8, wherein a first TVS tube, a second TVS tube and a third TVS tube are further disposed on the FPC, the first TVS tube is connected to the pin A1, the second TVS tube is connected to the pin K1, and the third TVS tube is connected to the pin K2.