CN106980209B

CN106980209B - Liquid crystal display device having a plurality of pixel electrodes

Info

Publication number: CN106980209B
Application number: CN201710407824.4A
Authority: CN
Inventors: 柯思超
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2017-06-02
Filing date: 2017-06-02
Publication date: 2020-05-19
Anticipated expiration: 2037-06-02
Also published as: CN106980209A

Abstract

The application discloses a liquid crystal display device, which comprises a driving chip, a backlight structure and a metal supporting component; the backlight structure comprises a flexible circuit board, wherein the flexible circuit board comprises a light emitting area, and a plurality of light emitting diodes are arranged in the light emitting area; the flexible circuit board comprises a first protruding end and a second protruding end, the first protruding end comprises at least one port used for being electrically connected with the driving chip, and the second protruding end comprises a conductive area; the flexible circuit board is provided with a grounding wire surrounding the luminous area, the grounding wire is electrically connected with the conductive area, and the conductive area is electrically connected with the metal supporting component. The liquid crystal display device can conduct static electricity around the backlight structure to the metal supporting part of the liquid crystal display device, reduces the risk that the static electricity is accumulated on the flexible circuit board to cause the light emitting diode to be broken down, and can realize a good static protection effect.

Description

Liquid crystal display device having a plurality of pixel electrodes

Technical Field

The application relates to the technical field of display, in particular to the technical field of liquid crystal display, and particularly relates to a liquid crystal display device.

Background

Liquid crystal display devices are increasingly used in various fields related to display because of their advantages such as low power consumption, high resolution, and low cost. A liquid crystal display device generally includes a Light Emitting Diode (LED) light bar as a backlight, and the LED light bar is composed of a Flexible Printed Circuit (FPC) and an LED soldered on the FPC.

When the driving chip of the liquid crystal display device supplies power to the LED, static electricity is easily generated. The existing LED lamp strip is not designed to be grounded, and generated static electricity can be accumulated on the LED lamp strip, so that an LED is damaged by being hit, and the liquid crystal display device cannot normally display.

Disclosure of Invention

In order to solve the problems mentioned in the background section above, embodiments of the present application provide a liquid crystal display device.

The liquid crystal display device provided by the embodiment of the application comprises a driving chip, a backlight structure and a metal supporting component; the backlight structure comprises a flexible circuit board, wherein the flexible circuit board comprises a light emitting area, and a plurality of light emitting diodes are arranged in the light emitting area; the flexible circuit board comprises a first protruding end and a second protruding end, the first protruding end comprises at least one port used for being electrically connected with the driving chip, and the second protruding end comprises a conductive area; the flexible circuit board is provided with a grounding wire surrounding the luminous area, the grounding wire is electrically connected with the conductive area, and the conductive area is electrically connected with the metal supporting component.

The liquid crystal display device provided by the embodiment of the application, through set up the second that includes the conducting region on the flexible circuit board of structure in a poor light and stretch out the end to be connected conducting region and metal support part electricity, the static conduction that produces when can drive the chip to the power supply of emitting diode stretches out the end to the second, and then conducts static to liquid crystal display device's metal support part, has reduced static and has gathered and lead to emitting diode by the risk of puncturing on the flexible circuit board, can realize good electrostatic protection effect.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings in which:

fig. 1 is a schematic structural view of a liquid crystal display device according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a backlight structure of the LCD device shown in FIG. 1;

FIG. 3 is a schematic cross-sectional view of the backlight structure shown in FIG. 2 along the cross-sectional line AA';

FIG. 4 is a schematic view of a structure of one embodiment of a liquid crystal display device of the present application;

fig. 5 is a schematic structural view of another embodiment of a liquid crystal display device of the present application;

fig. 6 is a schematic structural view of a further embodiment of a liquid crystal display device of the present application;

fig. 7 is a schematic diagram of a circuit in the backlight configuration of fig. 2.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1, a schematic structural diagram of a liquid crystal display device according to an embodiment of the present application is shown.

As shown in fig. 1, the liquid crystal display device 100 includes a liquid crystal display panel 11, a driving chip 12, a backlight structure 13, and a metal supporting member 14. The driving chip 12 may be disposed on the liquid crystal display panel 11, the driving chip 12 is configured to supply power to the circuit structure in the liquid crystal display panel 11 and control the circuit structure in the liquid crystal display panel 11 to operate, and the driving chip 12 is electrically connected to the backlight structure 13 and is further configured to supply power to the backlight structure 13. The metal supporting member 14 may be a metal member for supporting the liquid crystal display panel 100, and the metal supporting member 14 may have a large surface area.

It should be noted that the liquid crystal display panel 11 may include an array substrate, a color filter substrate, and a liquid crystal layer located between the array substrate and the color filter substrate. The array substrate and the color film substrate can be designed by adopting the structure of the existing liquid crystal display panel, and unnecessary blurring of the key points of the application is avoided, which is not repeated in the application.

Referring to fig. 2, a schematic structural diagram of the backlight structure 13 of the liquid crystal display device 100 shown in fig. 1 is shown. As shown in fig. 2, the backlight structure may include a flexible circuit board 20. The flexible circuit board 20 includes a light emitting region 201, and a plurality of light emitting diodes D1 are disposed in the light emitting region 201, and each light emitting diode D1 is used for providing backlight of the liquid crystal display device. The flexible circuit board 20 further includes a first protruding end 202 and a second protruding end 203. The first protruding end 202 includes at least one port 2021 for electrical connection with the driving chip. Specifically, the port 2021 electrically connected to the driver chip includes a port for supplying power to each light emitting diode D1. The second protruding end 203 includes a conductive region 2031, and optionally, the conductive region 2031 may be formed of a metal material fabricated on the flexible circuit board 20.

The flexible circuit board 20 is further provided with a ground wire 2011 surrounding the light emitting region 201, the ground wire 2011 is electrically connected with the conductive region 2031 of the second protruding end 203, and the conductive region 2031 is electrically connected with a metal supporting member of the liquid crystal display device.

In this embodiment, the ground line 2011 surrounding the light emitting region 201 can conduct static electricity generated when the driving chip supplies power to the light emitting diode D1 to the conductive region 2031, and then the static electricity is transmitted from the conductive region 2031 to the metal supporting member of the liquid crystal display device.

With continued reference to FIG. 3, a cross-sectional view of the backlight structure of FIG. 2 along cross-sectional line AA' is shown. As shown in fig. 3, in some embodiments of the present application, the flexible circuit board includes a copper foil 32 and

substrates

31, 33 on both sides of the copper foil 32 and glued to the copper foil. The

substrates

31 and 33 may be made of Polyimide (PI) or the like.

As shown in fig. 3, the cross-sectional structure of the backlight structure along the cross-sectional line AA' includes five portions, a1, a2, A3, a4 and a5, wherein a1 corresponds to the port 2021 of the first protruding end 202, a2 corresponds to the region of the first protruding end 202 where the port 2021 is not disposed, A3 corresponds to a portion of the grounding line 2011, a4 corresponds to a portion of the conductive region 2031, and a5 corresponds to a portion of the second protruding end 203 outside the conductive region.

As can be seen from fig. 3, in the present embodiment, the copper foils of the port 2021, the ground line 2011 and the conductive area 2031 on the flexible circuit board are exposed, i.e., the substrate on the copper foil side of the port 2021, the ground line 2011 and the conductive area 2031 can be peeled off. Therefore, the structure comprising the port, the grounding wire and the conductive area can be formed by directly utilizing the flexible circuit board, and a conductive layer for forming the port, the grounding wire or the conductive area is not required to be additionally arranged, so that the manufacturing process is simplified.

Referring to fig. 4, a schematic structural diagram of an embodiment of a liquid crystal display device of the present application is shown. Here, only a side view schematic diagram of a part of the structure of the liquid crystal display device related to the backlight structure is shown.

In the present embodiment, the liquid crystal display device 400 includes a driving chip (not shown), a backlight structure, and a metal supporting member. Here, the metal supporting member includes a backlight metal frame 44. The backlight metal frame 44 may be a frame made of iron, aluminum alloy, copper, etc. for supporting and protecting the backlight structure, and may increase the strength of the liquid crystal display device.

In the present embodiment, the backlight structure may be the structure shown in fig. 2, including the flexible circuit board 43. The flexible circuit board 43 includes a light emitting region in which a plurality of light emitting diodes 410 are disposed. Also, the flexible circuit board 43 may include a ground line surrounding the light emitting region and a second protruding terminal 431, the second protruding terminal 431 including the conductive region 403. The conductive area 403 is electrically connected to a ground line, and the conductive area 403 is bonded to the backlight metal frame 44 by a conductive adhesive 45.

It should be noted that the second protruding end 431 of the flexible circuit board 43 can be bent, so that the conductive area 403 can be close to the backlight metal frame 44 and adhered by the conductive adhesive 45.

In a further embodiment, the conductive regions 403 are bonded to the backlight metal frame 44 on a side of the backlight metal frame 44 facing away from the light emitting diodes 410. In this way, it is ensured that the side of the backlight metal frame 44 facing the light emitting diodes 410 can provide stable support, and the conductive region 403 is prevented from occupying a portion of the backlight metal frame 44 for supporting the flexible circuit board when the side of the backlight metal frame 44 facing the light emitting diodes 410 is bonded to the backlight metal frame 44, so that the support stability of the backlight metal frame 44 is reduced.

The conductive adhesive 45 can electrically connect the conductive region 403 to the backlight metal frame 44, and further electrically connect the ground line to the backlight metal frame, so that static electricity around the light emitting diode 410 can be transmitted to the backlight metal frame 44 through the ground line, thereby effectively shielding the influence of static electricity on the working current of the light emitting diode, and avoiding the breakdown of the light emitting diode caused by static electricity accumulation.

In some alternative implementations of the embodiment, as shown in fig. 4, each light emitting diode 410 may be soldered to one side surface of the flexible circuit board 43, and the conductive region 403 is located on the same side surface as the light emitting diode 410. Further, a light shielding tape 46 is fixed to the other side surface of the flexible circuit board 46. The liquid crystal display device 400 may further include a light guide plate 47 disposed on a surface of the flexible circuit board 43 on which the light emitting diodes 410 are soldered, a liquid crystal display panel 41 positioned on a side of the light guide plate 47 facing the flexible circuit board 43, and a reflective sheet 48 positioned on a side of the light guide plate 47 facing away from the flexible circuit board 43. The light shielding tape 46 is used for shielding the light emitted by the light emitting diode 410 in the direction perpendicular to the surface of the light guide plate 47, so as to prevent the liquid crystal display device from leaking light; the light guide plate 47 is used for diffusing the light emitted by the light emitting diode 410 to make the brightness of the incident light to the liquid crystal display screen uniform; the reflective sheet 48 is used for reflecting light incident to the bottom of the light guide plate into the light guide plate, so that the light emitting efficiency can be improved, and the power consumption of the backlight structure can be reduced.

Please refer to fig. 5, which shows a schematic structural diagram of another embodiment of the liquid crystal display device of the present application. Similarly, fig. 5 is a schematic side view showing only a part of the structure of the liquid crystal display device related to the backlight structure.

In the present embodiment, the liquid crystal display device 500 includes a driving chip (not shown), a backlight structure, and a metal supporting member. In this embodiment, the metal support member includes a metal chassis 54. The metal chassis 54 may be made of iron, aluminum alloy, copper, or the like, and protects the internal structure of the liquid crystal display device.

In the present embodiment, the backlight structure may be the structure shown in fig. 2, including the flexible circuit board 53. The flexible circuit board 53 includes a light emitting region in which a plurality of light emitting diodes 510 are disposed. Also, the flexible circuit board 53 may include a ground line surrounding the light emitting region and a second protruding end 531, the second protruding end 531 including the conductive region 503. The conductive area 503 is electrically connected to a ground line, and the conductive area 503 is bonded to the metal chassis 54 by the conductive adhesive 55.

It should be noted that the second protruding end 531 of the flexible circuit board 53 may be bent, so that the conductive area 503 may be close to the backlight metal frame 54 and adhered by the conductive adhesive 55.

The conductive adhesive 55 can electrically connect the conductive area 503 to the metal housing 54, and further electrically connect the ground line to the metal housing 54, so that static electricity around the light emitting diode 510 can be transmitted to the metal housing 54 through the ground line, thereby effectively shielding the static electricity from affecting the working current of the light emitting diode, and preventing the light emitting diode from being broken down due to static electricity accumulation. When the metal shell is applied to a handheld liquid crystal display device, static electricity on the metal shell can be conducted to the ground through a human body, and the situation that the normal operation of internal elements of the liquid crystal display device is influenced due to the fact that a large amount of charges are accumulated on the metal shell is guaranteed.

In a further embodiment, the conductive area 503 is adhered to the metal chassis 54 on a side thereof facing the flexible circuit board 53. In this way, the stability of the electrical connection of the conductive area 503 to the metal chassis 54 can be ensured.

Similarly to the liquid crystal display device shown in fig. 4, in some alternative implementations of the present embodiment, each light emitting diode 510 may be soldered to one side surface of the flexible circuit board, and the conductive region 503 is located on the same side surface as the light emitting diode 510. A light shielding tape 56 is fixed to the other surface of the flexible circuit board 53. The liquid crystal display device 500 may further include a light guide plate 57 disposed on a surface of the flexible circuit board 53 on which the light emitting diodes 510 are soldered, a liquid crystal display panel 51 positioned on a side of the light guide plate 57 facing the flexible circuit board 53, and a reflective sheet 58 positioned on a side of the light guide plate 57 facing away from the flexible circuit board 53. The light shielding tape 56 is used for shielding the light emitted from the light emitting diode 510 in the direction perpendicular to the surface of the light guide plate 57, so as to prevent the liquid crystal display device from leaking light; the light guide plate 57 is used for diffusing light emitted from the light emitting diode 510, so that the brightness of light incident to the liquid crystal display screen is uniform; the reflective sheet 58 is used for reflecting light incident to the bottom of the light guide plate into the light guide plate, so that the light emitting efficiency can be improved, and the power consumption of the backlight structure can be reduced.

With continued reference to fig. 6, a schematic structural diagram of yet another embodiment of a liquid crystal display device of the present application is shown. Similarly, fig. 6 is a schematic side view showing only a part of the structure of the liquid crystal display device related to the backlight structure.

In the present embodiment, the liquid crystal display device 600 includes a driving chip (not shown), a backlight structure, a metal supporting member, and a metal dome 65. In this embodiment, the metal support member includes a metal chassis 64. The metal chassis 64 may be made of iron, aluminum alloy, copper, or the like, and is used to protect the internal structure of the liquid crystal display device.

In the present embodiment, the backlight structure may be the structure shown in fig. 2, including the flexible circuit board 63. The flexible circuit board 63 includes a light emitting region in which a plurality of light emitting diodes 610 are disposed. Also, the flexible circuit board 63 may include a ground line surrounding the light emitting region and a second protruding end 631, the second protruding end 631 including the conductive region 603. The conductive area 603 is electrically connected to a ground line, and both the conductive area 603 and the metal chassis 64 are in contact with the metal dome 65.

The metal elastic sheet 65 can electrically connect the conductive area 603 with the metal casing 64, and further electrically connect the ground line with the metal casing 64, so that static electricity around the light emitting diode 610 can be transmitted to the metal casing 64 through the ground line, thereby effectively achieving electrostatic protection of the light emitting diode. When the metal shell is applied to a handheld liquid crystal display device, static electricity on the metal shell can be conducted to the ground through a human body, and the situation that the normal operation of internal elements of the liquid crystal display device is influenced due to the fact that a large amount of charges are accumulated on the metal shell is guaranteed.

In a further embodiment, as shown in fig. 6, the metal elastic sheet 65 may be disposed between the conductive area 603 of the second protruding end 631 and the metal housing 64, and the second protruding end 631 may be bent, so that the conductive area 603 is close to the metal housing 64, thereby ensuring that the metal elastic sheet 603 can stably electrically connect the metal housing 64 and the conductive area 603.

It should be noted that fig. 6 only schematically illustrates the shape and structure of the metal dome 65, in a specific implementation, the metal dome may be a whole piece, a grid, or have another shape, and the shape and structure of the metal dome are not particularly limited in the embodiment of the present application.

Similarly to the liquid crystal display device shown in fig. 4 and 5, in some alternative implementations of the present embodiment, each light emitting diode 610 may be soldered to one side surface of the flexible circuit board 63, and the conductive area 603 is located on the same side surface as the light emitting diode 610. Further, a light shielding tape 66 is fixed to the other surface of the flexible circuit board 63. The liquid crystal display device 600 may further include a light guide plate 67 disposed on a surface of the flexible circuit board 63 on which the light emitting diodes 610 are soldered, a liquid crystal display panel 61 positioned on a side of the light guide plate 67 facing the flexible circuit board 63, and a reflective sheet 68 positioned on a side of the light guide plate 67 facing away from the flexible circuit board 63. The light shielding tape 66 is used for shielding light emitted by the light emitting diode 610 in a direction perpendicular to the surface of the light guide plate 67, so as to prevent light leakage of the liquid crystal display device; the light guide plate 67 is used for diffusing the light emitted by the light emitting diode 610, so that the brightness of the incident light to the liquid crystal display screen is uniform; the reflective sheet 68 is used to reflect light incident on the bottom of the light guide plate into the light guide plate, so as to improve light emitting efficiency and reduce power consumption of the backlight structure.

Unlike the embodiment shown in fig. 5, the liquid crystal display device 600 of the present embodiment utilizes the metal elastic sheet 65 to electrically connect the conductive area 603 and the metal chassis 64, and the metal elastic sheet 65 has a certain rigidity and can provide a certain auxiliary support for the flexible circuit board 63, so as to improve the stability of the internal structure of the liquid crystal display device.

In the above embodiments, the light emitting diodes on the flexible circuit board need to be powered by the driving chip. The power supply manner of the light emitting diode on the flexible circuit board according to the embodiment of the present application is further described below with reference to fig. 7.

Fig. 7 is a schematic diagram illustrating a structure of a circuit in the backlight structure shown in fig. 2, that is, a schematic diagram illustrating a circuit structure of the light emitting diode D1, the ground line, and the first protruding terminal 202 in the backlight structure shown in fig. 2.

As shown in fig. 7, 9 light emitting diodes D71, D72, D73, D74, D75, D76, D77, D78, and D79 are provided in the light emitting region of the flexible circuit board as an example. The ports provided at the first protruding end include a first input port I and a plurality of second input ports K1, K2, K3, and the plurality of light emitting diodes include a plurality of light emitting diode groups connected in parallel with each other, each light emitting diode group including a positive input terminal, a negative input terminal, and a plurality of light emitting diodes connected in series between the positive input terminal and the negative input terminal. For example, in fig. 7, the 9 leds are divided into three groups, wherein D71, D74 and D77 belong to the same led group, D72, D75 and D78 belong to the same led group, and D73, D76 and D79 belong to the same led group. The anode of the first LED in each LED group is electrically connected with the positive input end of the LED group, and the cathode of the last LED is electrically connected with the negative input end of the LED group. For example, in fig. 7, the anodes of the first leds D71, D72, D73 of the three led groups are electrically connected to the positive input terminals of the three led groups in a one-to-one correspondence, and the cathodes of the last leds D77, D78, D79 of the three led groups are electrically connected to the negative input terminals of the three led groups in a one-to-one correspondence.

In the present embodiment, the positive input terminal of each led group is electrically connected to the first input port I, and the negative input terminal of each led group is electrically connected to the second input ports K1, K2, K3 in a one-to-one correspondence. That is, the anodes of the first leds in each led group are connected to the first input port I, and the cathodes of the last leds in each led group are electrically connected to the second input ports K1, K2, K3 in a one-to-one correspondence.

Further, the flexible circuit board further includes an input lead 710, a plurality of

input signal lines

701, 702, and 703 corresponding to the light emitting diode groups one to one, a plurality of

output signal lines

704, 705, and 706 corresponding to the light emitting diode groups one to one, and a plurality of connection lines for connecting two adjacent light emitting diodes in the same light emitting diode group. The input lead 710 is electrically connected to the first input port I, and the

input signal lines

701, 702, and 703 are electrically connected to the input lead 710, so that the first led D71, D72, and D73 of each led group is electrically connected to the first input port I through the

input signal lines

701, 702, and 703, respectively.

The negative input end of each led group is electrically connected to the corresponding second input port K1, K2, K3 through the corresponding

output signal line

704, 705, 706 in a one-to-one correspondence manner, so that the last led D77, D78, D79 of each led group is electrically connected to the corresponding second input port through the

output signal line

704, 705, 706, respectively.

In the present embodiment, the input lead 710, the

input signal lines

701, 702, and 703, the

output signal lines

704, 705, and 706, and the connecting lines are located in the light emitting region. In this way, the ground line of the flexible display panel may shield external static electricity from interfering with the input lead 710, the

input signal lines

701, 702, and 703, the

output signal lines

704, 705, and 706, and the connection lines for transmitting signals to the organic light emitting diodes.

The first input port I, the second input ports K1, K2, and K3 are electrically connected to the driving chip. When power is supplied, the driving chip can provide a high level signal to the first input port and provide a low level signal to the second input ports K1, K2 and K3, and the voltage difference between the high level signal and the low level signal is greater than the turn-on voltage of each light emitting diode, that is, each light emitting diode can emit light to provide backlight for the liquid crystal display device.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The liquid crystal display device is characterized by comprising a driving chip, a backlight structure and a metal supporting component;

the backlight structure comprises a flexible circuit board, one side surface of the flexible circuit board comprises a light emitting area, and a plurality of light emitting diodes are arranged in the light emitting area;

the flexible circuit board comprises a first protruding end and a second protruding end, the first protruding end comprises at least one port used for being electrically connected with the driving chip, and the second protruding end comprises a conductive area;

the flexible circuit board is provided with a grounding wire surrounding the light emitting area, the grounding wire is electrically connected with the conductive area, and the conductive area is electrically connected with the metal supporting component;

the flexible circuit board also comprises a copper foil and base materials which are positioned on two sides of the copper foil and are glued with the copper foil; the port, the grounding wire and the copper foil of the conductive area are exposed, the copper foils positioned on the port, the grounding wire and the conductive area are conducted, and the grounding wire is used for conducting static electricity generated when the driving chip supplies power to the light emitting diode to the conductive area.

2. The liquid crystal display device according to claim 1, wherein the metal supporting member includes a backlight metal frame;

the conductive area is adhered to the backlight metal frame through conductive adhesive.

3. The liquid crystal display device according to claim 2, wherein the conductive region is bonded to the backlight metal frame on a side of the backlight metal frame facing away from the light emitting diode.

4. The liquid crystal display device according to claim 1, wherein the metal supporting member comprises a metal chassis;

the conductive area is bonded with the metal casing through conductive adhesive.

5. The liquid crystal display device according to claim 4, wherein the conductive region is bonded to the metal chassis on a side of the metal chassis facing the flexible circuit board.

6. The lcd apparatus of claim 1, wherein the metal supporting member comprises a metal chassis, the lcd apparatus further comprising a metal dome;

the conductive area and the metal shell are both in contact with the metal elastic sheet.

7. The liquid crystal display device according to any one of claims 1 to 6, wherein the ports include a first input port and a plurality of second input ports;

the plurality of light emitting diodes comprise a plurality of light emitting diode groups connected in parallel with each other, each of the light emitting diode groups comprising a positive input end, a negative input end, and a plurality of light emitting diodes connected in series between the positive input end and the negative input end, wherein an anode of a first light emitting diode in each light emitting diode group is electrically connected to the positive input end, and a cathode of a last light emitting diode in each light emitting diode group is electrically connected to the negative input end;

the positive input end of each light emitting diode group is electrically connected with the first input port, and the negative input end of each light emitting diode group is electrically connected with the second input ports in a one-to-one correspondence manner.

8. The lcd apparatus of claim 7, wherein the flexible circuit board further comprises an input lead, a plurality of input signal lines corresponding to the led groups one to one, a plurality of output signal lines corresponding to the led groups one to one, and a plurality of connection lines for connecting two adjacent leds in the same led group;

the input lead is electrically connected with the first input port, and each input signal line is electrically connected with the input lead;

the negative input end of each light-emitting diode group is electrically connected with each corresponding second input port in a one-to-one correspondence manner through a corresponding output signal line;

the input lead, the input signal lines, the output signal lines and the connecting lines are located in the light emitting area.

9. The liquid crystal display device according to any one of claims 1 to 6, wherein each of the light emitting diodes is soldered to one side surface of the flexible circuit board.

10. The liquid crystal display device according to claim 9, wherein a light shielding tape is fixed to the other side surface of the flexible circuit board;

the liquid crystal display device further comprises a light guide plate, a liquid crystal display screen and a reflecting sheet, wherein the light guide plate is welded on the flexible circuit board and provided with the light emitting diodes, the liquid crystal display screen is positioned on one side, facing the flexible circuit board, of the light guide plate, and the reflecting sheet is positioned on one side, facing away from the flexible circuit board, of the light guide plate.