CN217360498U

CN217360498U - Display device

Info

Publication number: CN217360498U
Application number: CN202221246034.5U
Authority: CN
Inventors: 张继兵; 姜旭东; 张宇; 孔孟菲
Original assignee: Hisense Visual Technology Co Ltd
Current assignee: Hisense Visual Technology Co Ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-09-02
Anticipated expiration: 2032-05-23

Abstract

The utility model discloses a display device, include: display panel and backlight unit, backlight unit includes: the circuit board and a plurality of light sources, each light source is divided into a plurality of subareas, and a subarea circuit comprises a positive electrode and a negative electrode; the circuit board comprises at least one wiring area, the wiring area comprises a plurality of bonding pads, and the bonding pads are divided into a first bonding pad and a second bonding pad; the positive electrode of the partitioned circuit is connected with the corresponding first bonding pad, and the negative electrode of the partitioned circuit is connected with the corresponding second bonding pad. The first bonding pads and the second bonding pads are not interconnected through lines, so that the positive pole and the negative pole of each line of each partition can be independently controlled by applying electric signals. By adopting the circuit design, the conversion of the partition quantity can be realized by connecting different partitions in series through an external circuit, and the design is not needed to be respectively designed for different light source partitions, so that the design cost can be effectively reduced.

Description

Display device

Technical Field

The utility model relates to a show technical field, especially relate to a display device.

Background

The liquid crystal display screen has the advantages of low power consumption, small size, low radiation and the like as the current mainstream display screen. The liquid crystal display panel is a non-self-luminous panel and needs to be matched with a backlight module for use.

The existing direct type backlight module usually adopts Light Emitting Diodes (LEDs) as backlight source, and has the advantages of high backlight brightness, no reduction of brightness even after long-term use, and the like. In order to realize image display with higher contrast and high dynamic range, the LEDs in the backlight module usually perform zone control, that is, the Local Dimming (LD) technology is used to perform zone brightness control on the light sources in different zones according to the display image.

However, the requirements for the number of partitions of the current display device for different application scenarios may be different, and therefore, the circuit design needs to be performed again for each number of partitions, which causes a great waste of resources.

SUMMERY OF THE UTILITY MODEL

In some embodiments of the present invention, a display device, includes:

a display panel for image display;

the backlight module is positioned on the light incident side of the display panel and used for providing backlight;

the backlight module includes:

a circuit board;

the light sources are positioned on the circuit board and electrically connected with the circuit board;

each light source is divided into a plurality of subareas, the light sources of different subareas are independently controlled, and a circuit of one subarea comprises an anode and a cathode;

the circuit board comprises at least one wiring area, the wiring area comprises a plurality of bonding pads, and the bonding pads are divided into a first bonding pad and a second bonding pad; a first bonding pad and a second bonding pad form a bonding pad pair, a partitioned circuit is correspondingly connected with the bonding pad pair, the positive pole of the partitioned circuit is connected with the first bonding pad in the corresponding bonding pad pair, and the negative pole of the partitioned circuit is connected with the second bonding pad in the corresponding bonding pad pair.

The first bonding pads and the second bonding pads are not interconnected through lines, so that the positive pole and the negative pole of each line of each partition can be independently controlled by applying electric signals. By adopting the circuit design, the conversion of the partition quantity can be realized by connecting different partitions in series through an external circuit, and the design is not needed to be respectively designed for different light source partitions, so that the design cost can be effectively reduced.

The utility model discloses some embodiments, each first pad and each second pad are arranged in turn, and a pad pair is constituteed to adjacent a first pad and a second pad. In general, each first pad and each second pad are symmetrically distributed, and the first pads and the second pads are alternately arranged, so that the connection processing of adjacent partitions is facilitated when the partition number is converted.

In some embodiments of the present invention, the backlight module further includes: the circuit board comprises at least one wiring terminal, the number of the wiring terminals is generally equal to the number of wiring areas contained in the circuit board, and one wiring area is correspondingly connected with one wiring terminal. The wiring terminal is used for connecting the flexible flat cable, so that the circuit board can be connected with the control panel through the wiring terminal and the flexible flat cable, and the control panel is in circuit connection with the circuit board. If the light source has more partitions and more complex circuits, more than one wiring area can be arranged on the circuit board, and then the wiring terminals with corresponding number can be respectively connected on each wiring area.

The utility model discloses in some embodiments, binding post includes a plurality of welding pins and connecting seat, and the welding pin is located binding post's bottom for with the pad welding on the circuit board, the pad one-to-one welding of welding pin and circuit board, thereby make circuit intercommunication between binding post and the circuit board. The connecting seat is internally provided with a circuit connection welding pin and is used for connecting the flexible flat cable. The flexible flat cable may be in electrical communication with the solder pins, whereby electrical signals may be applied to the circuit board through the flexible electrical cable.

In some embodiments of the present invention, the display device further comprises a partition number converter control board. The partition number converter is used for converting the partition number of the light source, and the control board is used for providing a driving signal. The wiring terminal partition number converters are connected through a first flexible flat cable; the partition quantity converter is connected with the control board through a second flexible flat cable. Can realize the conversion of subregion quantity under the prerequisite that does not change the circuit board circuit through changing different subregion quantity converter and the flexible flat cable of second, compare in the correlation technique to the circuit board of every subregion quantity all need the independent design, the embodiment of the utility model provides a change that only need change different subregion quantity converter and the flexible flat cable of second just can realize light source subregion quantity can be adapted to different model demands, effectively reduces design cost.

In some embodiments of the present invention, the partition quantity converter includes two upper connecting seats and two lower connecting seats which are stacked; the first flexible flat cable is connected between the wiring terminal and the lower layer connecting seat, and the second flexible flat cable is connected between the control board and the upper layer connecting seat. There is the electric connection relation between upper connecting seat and the lower floor's connecting seat to make through connecting terminal, first flexible flat cable, subregion quantity converter and the flexible flat cable circuit intercommunication of second between circuit board and the control panel.

In some embodiments of the present invention, the lower layer connecting seat includes a plurality of first pins and a plurality of second pins, and the first pins and the second pins are arranged alternately; a first pin pair is formed by adjacent first pins and second pins. The upper connecting seat comprises a plurality of third pins and a plurality of fourth pins, and the third pins and the fourth pins are alternately arranged; and a third pin and a fourth pin which are adjacent form a second pin pair. The first pin pairs correspond to the second pin pairs one to one, the first pin pairs and the second pin pairs correspond to each other, the first pins are electrically connected with the third pins, and the second pins are electrically connected with the fourth pins. Through set up the pin of mutual electric connection in upper connecting seat and lower floor's connecting seat to make subregion quantity converter can play the effect of adapter.

The utility model discloses in some embodiments, flexible flat cable is provided with the golden finger at both ends, is provided with the circuit between the golden finger at both ends, can connect the golden finger electricity at both ends. The first flexible flat cable comprises a plurality of first golden fingers and a plurality of second golden fingers, and the first golden fingers and the second golden fingers are alternately arranged; the first golden fingers correspond to the first pins one by one, and the second golden fingers correspond to the second pins one by one; when the first flexible flat cable is connected with the lower-layer connecting seat, the first golden finger is correspondingly connected with the first pin, and the second golden finger is correspondingly connected with the second pin. When the circuit is connected, the first pins in the lower connecting seat correspond to the pads on the circuit board one to one, the first pins in the first pin pairs are correspondingly connected with the first pads through the first flexible flat cables, and the second pins are correspondingly connected with the second pads through the first flexible flat cables. Therefore, each welding plate on the circuit board can be electrically connected with the lower layer connecting seat of the partition quantity converter through the connecting terminal and the first flexible flat cable.

In some embodiments of the present invention, at least one third pin and one fourth pin adjacent to each other in the upper connecting seat are electrically connected; the electrically connected third pin and the electrically connected fourth pin are respectively located in different second pin pairs. A second pin pair is electrically connected to a first pin pair corresponding to the first pin pair, and a first pin pair is electrically connected to a pad pair corresponding to the second pin pair. According to the connection relation, the third pin and the fourth pin which belong to different second pin pairs are electrically connected, namely the anode and the cathode which belong to different light source partitions are electrically connected, so that the two light source partitions are connected in series, the partition number of the light sources is reduced, and the light source number in one partition is increased. Therefore, the partition quantity of the light source can be changed by arranging the partition quantity converters and connecting and setting the pins in the partition quantity converters, the circuit of the circuit board is not required to be redesigned, the design cost is effectively reduced, and the same backlight source can be applied to different display devices by arranging different partition quantity converters.

The utility model discloses some embodiments, because at least one third pin and a fourth pin electricity that belong to different second pin pairs in the upper connecting seat are connected, consequently can corresponding reduction to the quantity of the golden finger of the flexible flat cable of second rather than being connected. Among the third pins, the third pin which is not connected with the fourth pin is a first third pin, and the third pin connected with the fourth pin is a second third pin; among the fourth pins, the fourth pin which is not connected with the third pin is a first-type fourth pin, and the fourth pin which is connected with the third pin is a second-type fourth pin. Correspondingly, the second flexible flat cable comprises a plurality of third golden fingers and a plurality of fourth golden fingers, and the third golden fingers and the fourth golden fingers are alternately arranged; the third golden fingers correspond to the first third pins one by one, and the fourth fingers correspond to the first fourth pins one by one; when the second flexible flat cable is connected with the upper connecting seat, the third golden finger is correspondingly connected with the first third pin, and the fourth golden finger is correspondingly connected with the first fourth pin. When the light source partition quantity conversion is carried out, the appropriate partition quantity converter and the corresponding second flexible flat cable can be replaced, and then the backlight source is connected with the control panel through the wiring terminal, the first flexible flat cable, the partition quantity converter and the second flexible flat cable, so that the partition quantity conversion can be completed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional structure diagram of a display device according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a display device according to an embodiment of the present invention;

fig. 3 is a schematic view of a plane structure of a lamp panel provided in an embodiment of the present invention;

fig. 4 is a schematic plan view of a light bar provided in the embodiment of the present invention;

fig. 5 is a schematic cross-sectional structure diagram of a circuit board according to an embodiment of the present invention;

fig. 6 is a schematic plan view of a circuit board according to an embodiment of the present invention;

FIG. 7 is a partially enlarged view illustrating a connection region in the related art;

fig. 8 is a second schematic plan view illustrating a circuit board according to an embodiment of the present invention;

FIG. 9 is an enlarged partial schematic view of the terminal area of FIG. 8;

fig. 10 is a schematic view illustrating a connection relationship between a circuit board and a control board according to an embodiment of the present invention;

fig. 11 is a schematic bottom view of a connection terminal according to an embodiment of the present invention;

fig. 12 is a schematic side view of a connection terminal according to an embodiment of the present invention;

fig. 13 is a second schematic view illustrating a connection relationship between a circuit board and a control board according to an embodiment of the present invention;

fig. 14 is a schematic side view of a partition quantity converter according to an embodiment of the present invention;

fig. 15 is a schematic view illustrating a connection relationship between the first flexible flat cable and the lower connection seat according to an embodiment of the present invention;

fig. 16 is a schematic view of a connection relationship between the second flexible flat cable and the upper connection seat according to an embodiment of the present invention.

Wherein, 100-backlight module, 200-display panel, 1-back panel, 2-backlight source, 3-diffuser plate, 4-optical film, 5-control panel, 6-partition number converter, 21-circuit board, 22-light source, 211-substrate, 212-circuit layer, 213-solder mask, z-partition, X-wiring region, a 1-first pad, a 2-second pad, a-pad pair, e 1-first circuit, e 2-second circuit, D-wiring terminal, f-flexible flat cable, f 1-first flexible flat cable, f 2-second flexible flat cable, b-soldering pin, k-connecting seat, ku-upper connecting seat, kd-lower connecting seat, c 1-first golden finger, c 2-a second gold finger, c 3-a third gold finger, c 4-a fourth gold finger, d 1-a first pin, d 2-a second pin, d 3-a third pin, d 4-a fourth pin, d 31-a first third pin, d 32-a second third pin, d 41-a first fourth pin, d 42-a second fourth pin, dm-a first pin pair and dn-a second pin pair.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention will be further described in conjunction with the accompanying drawings and examples. Example embodiments 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, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words for expressing the position and direction described in the present invention are all the explanations given by taking the drawings as examples, but can be changed according to the needs, and the changes are all included in the protection scope of the present invention. The drawings of the present invention are only for illustrating the relative positional relationship and do not represent true proportions.

The liquid crystal display device mainly comprises a backlight module and a liquid crystal display panel. The liquid crystal display panel does not emit light, and brightness display needs to be realized by a light source provided by the backlight module.

The display principle of the liquid crystal display device is that liquid crystal is placed between two pieces of conductive glass, and the electric field effect of liquid crystal molecule distortion is caused by the driving of an electric field between two electrodes so as to control the transmission or shielding function of a backlight source, thereby displaying an image. If a color filter is added, a color image can be displayed.

Fig. 1 is a schematic cross-sectional structure diagram of a display device according to an embodiment of the present invention.

As shown in fig. 1, the display device includes: the backlight module 100 is used for providing backlight to the display panel 200, and the display panel 200 is used for displaying images.

The backlight module 100 is generally disposed at the bottom of the display device, and has a shape and size corresponding to those of the display device. When applied to the field of televisions or mobile terminals, the backlight module generally takes a rectangular shape.

The embodiment of the utility model provides an in backlight unit adopt straight following formula backlight unit for even light that sends in whole light-emitting surface provides sufficient and the even light that distributes of luminance for display panel, so that display panel can normally show the image.

The display panel 200 is located at the light-emitting side of the backlight module 100, and the shape and size of the display panel are generally matched with those of the backlight module. In general, the display panel 200 may be configured in a rectangular shape including a top side, a bottom side, a left side and a right side, wherein the top side is opposite to the bottom side, the left side is opposite to the right side, the top side is connected to one end of the left side and one side of the right side, and the bottom side is connected to the other end of the left side and the other end of the right side.

The display panel 200 is a transmissive display panel, which can modulate the transmittance of light, but does not emit light by itself. The display panel 200 has a plurality of pixel units arranged in an array, and each pixel unit can independently control the transmittance and color of light incident to the pixel unit from the backlight module 100, so that the light transmitted by all the pixel units forms a displayed image.

Fig. 2 is a schematic perspective view of a display device according to an embodiment of the present invention.

As shown in fig. 2, the display device includes: a backlight module 100 and a display panel 200. The display panel 200 is located at the light emitting side of the backlight module 100, and the display panel 200 may be a liquid crystal display panel.

The backlight module 100 includes: a back plate 1, a backlight 2, a diffusion plate 3, and an optical film 4.

The back plate 1 is positioned at the bottom of the backlight module and has supporting and bearing functions. The back plate 1 is typically a square or rectangular structure, the shape of which, when applied to a contoured display device, is adapted to the shape of the display device.

The back panel 1 includes a top side, a bottom side, a left side and a right side. Wherein, the day side is opposite to the ground side, the left side is opposite to the right side, the day side is respectively connected with one end of the left side and one side of the right side, and the ground side is respectively connected with the other end of the left side and the other end of the right side.

The material of the back plate 1 is aluminum, iron, aluminum alloy or iron alloy. The back plate 1 is used for supporting the backlight source 2 and supporting and fixing the edge positions of the components such as the diffusion plate 3 and the optical membrane 4, and the back plate 1 also plays a role in dissipating heat of the backlight source 2.

The embodiment of the utility model provides an in, backlight unit is straight following formula backlight unit, and backlight 2 can adopt lamp plate or lamp strip.

Fig. 3 is a schematic view of a plane structure of a lamp panel provided in an embodiment of the present invention; fig. 4 is a schematic view of a plane structure of the light bar provided by the embodiment of the present invention.

As shown in fig. 3 and 4, the backlight 2 includes: a circuit board 21 and a light source 22. The circuit board 21 is used for providing a driving signal to the light source 22, and the light source 22 emits light under the driving of the circuit board 21.

In some embodiments, as shown in fig. 3, the circuit board 21 is a block, the plurality of light sources 22 are arranged on the circuit board 21 in an array, and the circuit board 21 and the light sources 22 form a lamp panel.

The lamp panel is located above the backboard 1. In general, the lamp panel may be square or rectangular, with a length of 200mm-1200mm and a width of 100mm-600 mm.

According to the size of the display device, a plurality of lamp panels can be arranged, and backlight is provided between the lamp panels in a splicing mode. For example, a 65 inch display device requires at least 2 × 4 lamp panels in a tiled arrangement. In order to avoid the optical problem that the lamp plate concatenation brought, the piece between the adjacent lamp plate is accomplished lessly as far as possible, realizes seamless concatenation even.

In some embodiments, as shown in fig. 4, the circuit board 21 is a bar, the plurality of light sources 22 are arranged in a row on the circuit board 21, and the circuit board 21 and the light sources 22 form a light bar. The backlight module can be provided with a plurality of lamp bars which are arranged in parallel.

The lamp strip is for the lamp plate, and light source quantity is less, and consequently the circuit design of circuit board is simple relatively, sets up the same effect of a plurality of parallel arrangement's lamp strip can realize the lamp plate on the backplate. In practical application, the lamp strip or the lamp panel can be adopted as the backlight source according to specific needs, and limitation is not made here.

The embodiment of the utility model provides an in backlight unit adopt straight following formula backlight unit, compare in side income formula backlight unit, have higher luminance, and adopt straight following formula backlight unit to be favorable to dividing the light source into more partitions, cooperate the regional technique of adjusting luminance, realize the high dynamic range image display of high contrast.

Fig. 5 is a schematic cross-sectional structure diagram of a circuit board according to an embodiment of the present invention.

As shown in fig. 5, the Circuit Board 21 may be a Printed Circuit Board (PCB). The circuit board 21 may be a single-layer board, a double-layer board or a multi-layer board according to actual needs, and is not limited herein.

Taking the structure shown in fig. 5 as an example, the circuit board 21 may be a single-layer board, and specifically includes: a substrate 211, a wiring layer 212, and a solder resist layer 213.

The substrate 211 has a load bearing function, and is the same shape and size as the circuit board, and may be generally rectangular or square. The substrate 211 may be made of BT, FR4, aluminum, glass, or flexible material, and is selected according to the application scenario, which is not limited herein.

The circuit layer 212 is disposed on the substrate 211 and is used for transmitting driving signals. The wiring layer 212 may be patterned after the substrate 211 is coated with copper. A single-layer circuit board typically forms the wiring layer 212 on only one side of the substrate 211; the double-layer board is formed by forming a circuit layer 212 on both sides of the substrate 211; the multilayer board comprises a plurality of circuit layers 212, the circuit layers 212 are separated from each other by insulating dielectric layers, and circuit connection is formed by punching holes in the dielectric layers.

The solder resist layer 213 is located on a side of the circuit layer 212 away from the substrate 211, and is used for insulating and protecting the circuit layer 212. The solder mask layer 213 is usually made of an insulating material and is coated on the surface of the circuit layer 212, and the solder mask layer 213 includes a plurality of windows, where the pads are exposed for welding components such as a light source, a driving chip, a capacitor or a resistor.

As shown in fig. 5, the light source 22 is located on the circuit board 21, specifically, on a side of the solder resist layer 213 facing away from the circuit layer 212, and the light source 22 is electrically connected to the circuit layer 212 through the window of the solder resist layer 213.

In the embodiment of the present invention, the Light source 22 can adopt a Light Emitting Diode (Light Emitting Diode, abbreviated as LED) or a Mini LED (Mini Light Emitting Diode, abbreviated as Mini LED), which is different from a common LED and specifically refers to a miniaturized LED chip. Because the Mini LED has a small size, the dynamic light emission of the backlight module is favorably controlled to be smaller in subareas, and the dynamic contrast of the picture is improved. In an embodiment of the present invention, at least one side of the single Mini LED chip is smaller than 500 μm; the size of the LED is usually in millimeter order, and the LED or the Mini LED may be selected as a light source according to actual needs in specific implementation, which is not limited herein.

As shown in fig. 2, the diffusion plate 3 is located on the light emitting side of the backlight 2 and is spaced from the backlight 2 by a certain distance. The distance is set so that the light sources can be sufficiently mixed. The diffusion plate 3 functions to scatter incident light, so that the light passing through the diffusion plate 3 is more uniform.

The diffusion plate 3 is provided with scattering particle materials, and light incident on the scattering particle materials can be refracted and reflected continuously, so that the effect of scattering the light is achieved, and the effect of light homogenization is achieved. The thickness of the diffusion plate is usually set to be 0.5mm-3mm, and the larger the thickness of the diffusion plate is, the higher the haze is, and the better the uniform effect is.

The diffuser plate 3 may be processed by an extrusion process, and the material of the diffuser plate 3 is generally at least one selected from the group consisting of PMMA, PC, PS, and PP.

In the embodiment of the present invention, the backlight source 2 can also be used for emitting blue light. At this time, the diffusion plate 3 may be a quantum dot diffusion plate for implementing a color conversion and diffusion function.

The optical film 4 is located on the side of the diffuser plate 3 facing away from the backlight 2. The optical film 4 is dimensioned to fit the display device, is slightly smaller than the display device, and is usually rectangular or square.

In a specific implementation, the optical film 4 may include one or a combination of several of a fluorescent film, a quantum dot film, a prism sheet, a brightness enhancement film, and the like, and is disposed according to specific needs, which is not limited herein.

When the backlight 2 in the backlight module is a monochromatic light source, for example, only including a blue light source, a fluorescent film and a quantum dot film are required to be disposed to convert a portion of the blue light into red light and green light, and the converted red light, green light and unconverted blue light are mixed into white light to provide backlight for the display panel.

The prism sheet can converge incident light to a normal viewing angle, thereby improving the brightness of the backlight module at the normal viewing angle.

The Brightness Enhancement Film can be a reflective polarizing Film (DBEF), which can improve the Brightness of the backlight module, improve the utilization efficiency of light, and make the emergent light have polarization property, thereby omitting the use of a polarizer under the display panel.

The embodiment of the utility model provides a backlight unit is straight following formula backlight unit, along with the user requires more and more high to the picture display effect, display device possesses regional dimming function usually. The local dimming technique is to divide a light source into a plurality of areas, and the light source in each area can be controlled simultaneously, and the light sources in different areas can be controlled separately. When the image is displayed, the brightness of the light source in the subarea corresponding to the darker area in the display picture can be reduced and the brightness of the light source in the subarea corresponding to the brighter area in the display picture can be improved according to the brightness distribution of the display picture, so that the contrast of the display picture is improved, and the high-dynamic-range image display can be realized.

Fig. 6 is a schematic plan view of a circuit board according to an embodiment of the present invention.

As shown in fig. 6, the circuit board 21 is connected with a plurality of light sources 22, each light source 22 is divided into a plurality of zones z, each zone z includes at least one light source 22, the light sources 22 in the same zone z are connected in series, the light sources 22 in the same zone z are controlled simultaneously, and the light sources in different zones z are controlled independently.

The circuit layer in the circuit board 21 is usually coated with copper on the whole surface and then etched to form a circuit, so that when the circuit is designed, the light sources 22 in the subareas are connected in series by a circuit of a subarea z, and the circuit comprises a positive electrode and a negative electrode, and the subarea generates a driving current by applying electric signals to the positive electrode and the negative electrode of the subarea circuit, so that the light sources in the subareas are driven to emit light.

Taking the structure shown in fig. 6 as an example, 16 light sources 22 are connected to one circuit board 21, and if two adjacent light sources 22 are divided into one partition z, the 16 light sources 22 can be divided into 8 partitions.

As shown in fig. 6, at least one wiring region X is disposed on the circuit board 21, the wiring region X is usually disposed at an edge of the circuit board 21, a plurality of pads are disposed in the wiring region X, the pads belong to a portion of the circuit layer, and the pads are connected to the positive electrode and the negative electrode of the light source partition z. The pads are used for connecting external connection lines to connect the circuit board 21 with a control board, which can provide driving signals for the circuit board 21 to control the light emitting brightness of the light sources in each zone z.

Fig. 7 is a partially enlarged view illustrating a connection region in the related art.

As shown in fig. 7, the terminal area includes a plurality of pads therein, which are connected to the lines of the circuit board. In general, the pad is divided into a first pad a1 and a second pad a2, wherein the first pad a1 is used for connecting the positive pole of the partition line, and the second pad a2 is used for connecting the negative pole of the partition line.

In the related art, the sub-regions of the light source usually adopt a common-positive and non-common-negative connection relationship, that is, the positive electrodes of the sub-region lines are connected to the first line e1, the first line e1 is connected to the first pad a1 corresponding to the positive electrode, and the negative electrodes of the sub-regions are connected to the second pad a2 corresponding to the negative electrode through the second line e 2. Thus, the same electric signal can be applied to the positive electrodes of all the subareas, and the brightness of each subarea is controlled by controlling the electric signal loaded on the negative electrode of each subarea.

Taking the structure shown in fig. 7 as an example, the circuit board includes 8 partitions, and the first pads a1 corresponding to the anodes of the 8 partitions are connected by the same first line e1, and the second pads a2 corresponding to the cathodes of the 8 partitions are connected by one second line e2, respectively.

When the structure shown in fig. 7 is adopted, the light source on the circuit board can be divided into 8 partitions, the number of partitions of the light source cannot be changed due to the connection relationship between the bonding pad and the wiring, and the number of light sources included in one partition cannot be changed.

However, the current display devices for different application scenarios may have different requirements on the number of partitions, for example, high-end display products require higher image quality, and therefore require a larger number of partitions for the light source, and the design and manufacturing costs are relatively high. For mid-end and low-end display products, the number of segments of the light source required to control the cost and display effect requirements is relatively small. Therefore, the circuit design needs to be carried out again for the display devices with different partition numbers, and great resource waste is brought.

In view of this, the embodiment of the present invention provides a display device, which can convert the partitions of the light source, and reduce the design cost.

Fig. 8 is a second schematic plan view illustrating a circuit board according to an embodiment of the present invention; fig. 9 is a partially enlarged view of the terminal area of fig. 8.

As shown in fig. 8, a plurality of light sources 22 are disposed on the circuit board 21, and the plurality of light sources 22 are divided into a plurality of sub-zones z, and usually, at least one light source 22 is included in one sub-zone z, and the light sources in one sub-zone z are connected in series, so that the light sources in the same sub-zone z can be controlled simultaneously, and the light sources in different sub-zones z can be controlled independently.

Taking fig. 8 as an example, 10 light sources 22 are disposed on the circuit board 21, and each light source 22 can be independently controlled, that is, 10 light sources can be divided into 10 partitions z, and each partition z includes only one light source 22.

As shown in fig. 8, at least one wiring region X is provided on the circuit board 21. As shown in fig. 9, a plurality of pads are provided in the terminal area X, and the pads are divided into a first pad a1 and a second pad a 2; wherein, a first pad a1 and a second pad a2 form a pad pair a, the circuit of a subarea z is correspondingly connected with the pad pair a, the positive pole (+) of the circuit of the subarea is connected with the first pad a1 of the corresponding pad pair, and the negative pole (-) of the circuit of the subarea is connected with the second pad a2 of the corresponding pad pair.

In the embodiment of the present invention, each of the first pads a1 and the second pads a2 is not interconnected by a circuit, so that the positive electrode and the negative electrode of the circuit of each partition z can be individually controlled by applying an electrical signal.

Taking fig. 9 as an example, the wiring region includes 10 first pads a1 and 10 second pads a2, and each first pad a1 is connected to the positive electrode (+) of a partition line, and each second pad a2 is connected to the negative electrode (-) of a partition line.

In some embodiments, as shown in fig. 9, the first pads a1 and the second pads a2 are alternately arranged, and one first pad a1 and one second pad a2 which are adjacent to each other constitute one pad pair a. In general, the first pads a1 and the second pads a2 are symmetrically distributed, and taking fig. 9 as an example, 10 pad pairs a may be divided into two groups of 5 pad pairs a, and the two groups of 5 pad pairs a are symmetrically distributed.

Fig. 10 is a schematic view illustrating a connection relationship between a circuit board and a control board according to an embodiment of the present invention.

As shown in fig. 10, the backlight module further includes: at least one connecting terminal D, the number of the connecting terminals D is generally equal to the number of the connecting regions X contained in the circuit board, and one connecting region X is correspondingly connected with one connecting terminal D, and the connecting region X is located below the connecting terminal D in fig. 10. The connection terminal D is used for connecting the flexible flat cable f, whereby the circuit board 21 can be connected to the control board 5 through the connection terminal D and the flexible flat cable f, so that the control board 5 and the circuit board 21 are electrically connected.

Fig. 11 is a schematic bottom view of a connection terminal according to an embodiment of the present invention; fig. 12 is a schematic side view of a connection terminal provided by an embodiment of the present invention.

As shown in fig. 11 and 12, the connection terminal includes a plurality of soldering pins b and a connection seat k, the soldering pins b are located at the bottom of the connection terminal and are used for soldering with pads on the circuit board, and the soldering pins b are soldered with the pads on the circuit board in a one-to-one correspondence, so that the connection between the connection terminal and the circuit board is achieved. A circuit connection welding pin b is arranged inside the connecting seat k, and the connecting seat k is used for connecting the flexible flat cable f. For example, a flexible flat cable f may be inserted into the connection socket shown in fig. 12 so as to be in circuit-communicating relation with the soldering pins b, whereby an electric signal may be applied to the circuit board through the flexible flat cable f.

When specifically implementing, if the subregion of light source is more, the circuit is comparatively complicated, can set up more than one wiring region X on the circuit board, then can adopt the binding post D that corresponds quantity to connect respectively on each wiring region X, the embodiment of the utility model provides a do not specifically prescribe a limit to wiring region X and binding post D's quantity.

Fig. 13 is a second schematic view illustrating a connection relationship between the circuit board and the control board according to an embodiment of the present invention.

As shown in fig. 13, the display device further includes a partition number converter 6 and a control board 5. Wherein the number-of-divisions converter 6 is for converting the number of divisions of the light source, and the control board 5 is for supplying the driving signal. The connecting terminal D is connected with the partition number converter 6 through a first flexible flat cable f 1; the partition number converter 6 and the control board 5 are connected by a second flexible flat cable f 2.

The embodiment of the utility model provides a can realize the conversion of subregion quantity under the prerequisite that does not change the circuit board circuit through changing different subregion quantity converter 6 and the flexible flat cable f2 of second, compare in the correlation technique to the circuit board of every subregion quantity all need the independent design, the embodiment of the utility model discloses only need to change different subregion quantity converter 6 and the flexible flat cable f2 of second and just can realize the change of light source subregion quantity, can be adapted to the model demand of height, well, the low side difference, effectively reduce design cost.

Fig. 14 is a schematic side view of a partition quantity converter according to an embodiment of the present invention.

Specifically, as shown in fig. 14, the partition number converter includes two upper layer connection seats ku and lower layer connection seats kd arranged in a stacked manner; the first flexible flat cable f1 is connected between the connection terminal D and the lower connector kd, and the second flexible flat cable f2 is connected between the control board 5 and the upper connector ku. There is an electrical connection relationship between the upper layer connection holder ku and the lower layer connection holder kd, so that the circuit board 21 and the control board 5 are in electrical communication through the connection terminal D, the first flexible flat cable f1, the partition number converter 6, and the second flexible flat cable f 2.

Fig. 15 is a schematic view of a connection relationship between the first flexible flat cable and the lower connection seat according to an embodiment of the present invention. Fig. 16 is a schematic view of a connection relationship between the second flexible flat cable and the upper connection seat according to an embodiment of the present invention.

As shown in fig. 15, the lower stage connector kd includes a plurality of first leads d1 and a plurality of second leads d2, the first leads d1 and the second leads d2 being alternately arranged; the adjacent first pin d1 and second pin d2 form a first pin pair dm.

As shown in fig. 16, the upper layer connection socket ku includes a plurality of third pins d3 and a plurality of fourth pins d4, and the third pins d3 and the fourth pins d4 are alternately arranged; the adjacent third pin d3 and fourth pin d4 form a second pin pair dn.

The first pin pair dm and the second pin pair dn are in one-to-one correspondence, the first pin pair dm and the second pin pair dn which are in mutual correspondence are electrically connected, the first pin d1 is electrically connected with the third pin d3, and the second pin d2 is electrically connected with the fourth pin d 4.

The pins electrically connected with each other are arranged in the upper-layer connecting seat ku and the lower-layer connecting seat kd, so that the partition quantity converter can play a role of an adapter.

As shown in fig. 15 and 16, the flexible flat cable has gold fingers at both ends, and a line is provided between the gold fingers at both ends, so that the gold fingers at both ends can be electrically connected.

Specifically, as shown in fig. 15, the first flexible flat cable f1 includes a plurality of first gold fingers c1 and a plurality of second gold fingers c2, the first gold fingers c1 and the second gold fingers c2 being alternately arranged; the first golden finger c1 corresponds to the first pin d1 one by one, and the second golden finger c2 corresponds to the second pin d2 one by one; when the first flexible flat cable f1 is connected to the lower layer connector socket, the first gold finger c1 is correspondingly connected to the first pin d1, and the second gold finger c2 is correspondingly connected to the second pin d 2.

When the circuit connection is performed, the first pin dm pair in the lower connecting seat kd corresponds to the pad pair a on the circuit board one to one, the first pin d1 in the first pin dm pair is correspondingly connected with the first pad a1 through the first flexible flat cable f1, and the second pin is correspondingly connected with the second pad a2 through the first flexible flat cable f1 of d 2.

Therefore, each welding plate on the circuit board can be electrically connected with the lower layer connecting seat of the partition quantity converter through the connecting terminal and the first flexible flat cable. The specific connection relationship is as follows: the first pad is electrically connected with a first golden finger of the first flexible flat cable through a pad pin of the connecting terminal, and when the first flexible flat cable is connected with the lower-layer connecting seat, the first golden finger is contacted with the first pin of the lower-layer connecting seat, so that the first pad is electrically connected with the first pin. Correspondingly, the pad pin of the second pad connecting terminal is electrically connected with the second golden finger of the first flexible flat cable, and when the first flexible flat cable is connected with the lower-layer connecting seat, the second golden finger is contacted with the second pin of the lower-layer connecting seat, so that the second pad is electrically connected with the second pin. The adjacent first bonding pad and the second bonding pad are respectively connected with the anode and the cathode of a light source partition circuit, the corresponding first pin and the second pin of the lower-layer connecting seat are connected with the anode and the cathode of the light source partition circuit, and each light source partition on the circuit board is sequentially connected to the first pin and the second pin of the lower-layer connecting seat by adopting the connection relation.

Further, as shown in fig. 16, at least one third pin d3 and one fourth pin d4 adjacent to each other in the upper layer connecting socket ku are electrically connected; the electrically connected third pin d3 and fourth pin d4 are located in different second pin pairs dn, respectively.

A second pin pair dn is electrically connected to a first pin pair dm corresponding to a pad pair a, and the positive and negative poles of a light source partition line are respectively connected to a pad pair a. According to the connection relationship, the third pin d3 and the fourth pin d4 belonging to different second pin pairs are electrically connected, which is equivalent to electrically connecting the positive electrodes and the negative electrodes belonging to different light source partitions, so that the two light source partitions are equivalent to be connected in series, the partition number of the light sources is reduced, and the number of the light sources in one partition is increased.

The embodiment of the utility model provides a through setting up subregion quantity converter to pin in it is connected the subregion quantity that the setting can change the light source, need not carry out redesign to the circuit of circuit board, has effectively reduced the design cost, through setting up different subregion quantity converters, can make same backlight be applied to different display device.

Since at least one third pin d3 and one fourth pin d4 belonging to different second pin pairs in the upper layer connecting socket ku are electrically connected, the number of gold fingers for the second flexible flat cable f2 connected thereto can be correspondingly reduced.

Specifically, as shown in fig. 16, in order to distinguish the third pin and the fourth pin having different connection relationships, the third pin which is not connected to the fourth pin among the third pins d3 is referred to as a first third pin d31, and the third pin connected to the fourth pin is referred to as a second third pin d 32; among the fourth pins, the fourth pin not connected to the third pin is referred to as a first fourth pin d41, and the fourth pin connected to the third pin is referred to as a second fourth pin d 42.

Accordingly, the second flexible flat cable f2 includes a plurality of third gold fingers c3 and a plurality of fourth gold fingers c4, the third gold fingers c3 and the fourth gold fingers c4 being alternately arranged; the third golden finger c3 corresponds to the first third pin d31, and the fourth finger c4 corresponds to the first fourth pin d 41; when the second flexible flat cable f2 is connected to the upper layer connection socket ku, the third gold finger c3 is correspondingly connected to the first third pin d31, and the fourth gold finger c4 is correspondingly connected to the first fourth pin d 41.

When the number of the light source partitions is converted, the appropriate partition number converter 6 and the corresponding second flexible flat cable f2 can be replaced, and then the backlight source is connected with the control board 5 through the wiring terminal D, the first flexible flat cable f1, the partition number converter and the second flexible flat cable f2, so that the conversion of the partition number can be completed.

Taking the partition number converter shown in fig. 15 and 16 as an example, as shown in fig. 15, the lower connection socket kd of the partition number converter includes 6 first pin pairs dm, and the positive and negative poles of 6 partition lines on the circuit board are connected by a first flexible flat cable f 1. As shown in fig. 16, in the upper layer connecting seat ku of the partition number converter, three pairs of adjacent third pins d3 and fourth pins d4 are connected, which is equivalent to connecting the positive electrodes and the negative electrodes of the three pairs of adjacent partitions, so that the two connected partitions are connected in series, and the original 6 partitions are converted into 3 partitions, thereby realizing the conversion of the partition number of the light source.

In specific implementation, the housing of the partition number converter 6 may be made of a plastic material, the pins in the partition number converter 6 may be made of a metal material, and the pitch between the pins may be 0.5mm, 1mm, or the like, which is not limited herein.

The upper layer connecting seat ku and the lower layer connecting seat kd can adopt a rotary clamp and a structure, and can also adopt a drawer type design, and limitation is not required.

According to the first utility model, the backlight source of the display device comprises a circuit board and light sources arranged on the circuit board, the light sources are divided into a plurality of subareas, at least one light source is contained in one subarea, and the light sources in one subarea are connected in series, so that the light sources in the same subarea can be controlled simultaneously, and the light sources in different subareas can be controlled independently. The partitioning circuit of each light source comprises a positive pole and a negative pole.

According to a second utility model, be provided with at least one wiring region on the circuit board. A plurality of bonding pads are arranged in the wiring area, and the bonding pads are divided into a first bonding pad and a second bonding pad; the first bonding pad and the second bonding pad form a bonding pad pair, a partitioned circuit is correspondingly connected with the bonding pad pair, the positive pole of the partitioned circuit is connected with the first bonding pad in the corresponding bonding pad pair, and the negative pole of the partitioned circuit is connected with the second bonding pad in the corresponding bonding pad pair. The first bonding pads and the second bonding pads are not interconnected through lines, so that the positive pole and the negative pole of each line of each partition can be independently controlled by applying electric signals.

According to the third utility model, each first pad and each second pad are arranged in turn, and a pad pair is formed by adjacent one first pad and one second pad. In general, each first pad and each second pad are symmetrically distributed, and the first pads and the second pads are alternately arranged, so that the connection processing of adjacent partitions is facilitated when the partition number is converted.

According to the fourth utility model, the backlight module further includes: the circuit board comprises at least one wiring terminal, the number of the wiring terminals is generally equal to the number of wiring areas contained in the circuit board, and one wiring area is correspondingly connected with one wiring terminal. The wiring terminal is used for connecting the flexible flat cable, so that the circuit board can be connected with the control board through the wiring terminal and the flexible flat cable, and the control board is connected with the circuit board through a circuit. If the light source has more partitions and more complex circuits, more than one wiring area can be arranged on the circuit board, and then the wiring terminals with corresponding number can be respectively connected on each wiring area.

According to the fifth novel concept, the connection terminal includes a plurality of welding pins and a connection seat, the welding pins are located at the bottom of the connection terminal and used for welding with pads on the circuit board, and the welding pins are welded with the pads of the circuit board in a one-to-one correspondence manner, so that the circuit between the connection terminal and the circuit board is communicated. The connecting seat is internally provided with a circuit connection welding pin and is used for connecting the flexible flat cable. The flexible flat cable may be in electrical communication with the solder pins, whereby electrical signals may be applied to the circuit board through the flexible electrical cable.

According to a sixth aspect of the present invention, the display device further includes a partition number converter control panel. The partition number converter is used for converting the partition number of the light source, and the control board is used for providing a driving signal. The wiring terminal partition number converters are connected through a first flexible flat cable; the partition quantity converter is connected with the control board through a second flexible flat cable. Can realize the conversion of subregion quantity under the prerequisite that does not change the circuit board circuit through changing different subregion quantity converter and the flexible flat cable of second, compare in the correlation technique to the circuit board of every subregion quantity all need the independent design, the embodiment of the utility model provides a change that only need change different subregion quantity converter and the flexible flat cable of second just can realize light source subregion quantity can be adapted to different model demands, effectively reduces design cost.

According to the concept of the seventh utility model, the partition quantity converter comprises an upper connecting seat and a lower connecting seat which are arranged in a laminated manner; the first flexible flat cable is connected between the wiring terminal and the lower layer connecting seat, and the second flexible flat cable is connected between the control board and the upper layer connecting seat. There is the electric connection relation between upper connecting seat and the lower floor's connecting seat to make through connecting terminal, first flexible flat cable, subregion quantity converter and the flexible flat cable circuit intercommunication of second between circuit board and the control panel.

According to the eighth utility model, the lower layer connecting seat comprises a plurality of first pins and a plurality of second pins, and the first pins and the second pins are arranged alternately; a first pin pair is formed by adjacent first pins and second pins. The upper connecting seat comprises a plurality of third pins and a plurality of fourth pins, and the third pins and the fourth pins are alternately arranged; and a third pin and a fourth pin which are adjacent form a second pin pair. The first pin pairs correspond to the second pin pairs one to one, the first pin pairs and the second pin pairs correspond to each other, the first pins are electrically connected with the third pins, and the second pins are electrically connected with the fourth pins. Through set up the pin of mutual electric connection in upper connecting seat and lower floor's connecting seat to make subregion quantity converter can play the effect of adapter.

According to the ninth utility model, the flexible flat cable is provided with the golden finger at both ends, is provided with the circuit between the golden finger at both ends, can be connected the golden finger electricity at both ends. The first flexible flat cable comprises a plurality of first golden fingers and a plurality of second golden fingers, and the first golden fingers and the second golden fingers are alternately arranged; the first golden fingers correspond to the first pins one by one, and the second golden fingers correspond to the second pins one by one; when the first flexible flat cable is connected with the lower-layer connecting seat, the first golden finger is correspondingly connected with the first pin, and the second golden finger is correspondingly connected with the second pin. When the circuit is connected, the first pins in the lower connecting seat correspond to the pads on the circuit board one to one, the first pins in the first pin pairs are correspondingly connected with the first pads through the first flexible flat cables, and the second pins are correspondingly connected with the second pads through the first flexible flat cables. Therefore, each welding plate on the circuit board can be electrically connected with the lower layer connecting seat of the partition quantity converter through the connecting terminal and the first flexible flat cable.

According to the tenth utility model, at least one third pin and one fourth pin which are adjacent to each other in the upper connecting seat are electrically connected; the electrically connected third pin and the electrically connected fourth pin are respectively located in different second pin pairs. A second pin pair is electrically connected to a first pin pair corresponding to the first pin pair, and a first pin pair is electrically connected to a pad pair corresponding to the second pin pair. According to the connection relation, the third pin and the fourth pin which belong to different second pin pairs are electrically connected, namely the anode and the cathode which belong to different light source partitions are electrically connected, so that the two light source partitions are connected in series, the partition number of the light sources is reduced, and the light source number in one partition is increased. Therefore, the partition quantity of the light source can be changed by arranging the partition quantity converters and connecting and setting the pins in the partition quantity converters, the circuit of the circuit board is not required to be redesigned, the design cost is effectively reduced, and the same backlight source can be applied to different display devices by arranging different partition quantity converters.

According to the eleventh utility model, because at least one third pin and one fourth pin that belong to different second pin pairs in the upper connecting seat are electrically connected, the number of golden fingers to the second flexible flat cable connected with it can correspondingly be reduced. Among the third pins, the third pin which is not connected with the fourth pin is a first third pin, and the third pin connected with the fourth pin is a second third pin; among the fourth pins, the fourth pin which is not connected with the third pin is a first fourth pin, and the fourth pin which is connected with the third pin is a second fourth pin. Correspondingly, the second flexible flat cable comprises a plurality of third golden fingers and a plurality of fourth golden fingers, and the third golden fingers and the fourth golden fingers are alternately arranged; the third golden fingers correspond to the first third pins one by one, and the fourth fingers correspond to the first fourth pins one by one; when the second flexible flat cable is connected with the upper connecting seat, the third golden finger is correspondingly connected with the first third pin, and the fourth golden finger is correspondingly connected with the first fourth pin. When the light source partition quantity conversion is carried out, the appropriate partition quantity converter and the corresponding second flexible flat cable can be replaced, and then the backlight source is connected with the control panel through the wiring terminal, the first flexible flat cable, the partition quantity converter and the second flexible flat cable, so that the partition quantity conversion can be completed.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A display device, comprising:

a display panel for image display;

the backlight module is positioned at the light incidence side of the display panel and used for providing backlight;

the backlight module includes:

a circuit board;

each light source is divided into a plurality of subareas, the light sources of different subareas are independently controlled, and the circuit of one subarea comprises an anode and a cathode;

the circuit board comprises at least one wiring area, the wiring area comprises a plurality of welding pads, and the welding pads are divided into first welding pads and second welding pads; one first pad and one second pad constitute a pad pair, one the subregion circuit corresponds and connects one the pad pair, the positive pole of subregion circuit is connected correspondingly first pad in the pad pair, the negative pole of subregion circuit is connected correspondingly the second pad in the pad pair.

2. The display device according to claim 1, wherein each of the first pads and each of the second pads are alternately arranged;

and one adjacent first bonding pad and one adjacent second bonding pad form one bonding pad pair.

3. The display device of claim 1, wherein one of said segments includes at least one of said light sources, and wherein said light sources within a same one of said segments are connected in series with each other.

4. The display device of claim 2, wherein the backlight module further comprises:

the wiring area of the circuit board is correspondingly connected with one wiring terminal;

the wiring terminal comprises a plurality of welding pins and a connecting seat, the welding pins correspond to the bonding pads in the wiring area one by one, and the welding pins are electrically connected with the corresponding bonding pads; the connecting seat is internally provided with a circuit connected with the welding pins and used for connecting a flexible flat cable.

5. The display device according to claim 4, wherein the display device further comprises a partition number converter and a control board; the partition number converter is used for converting the partition number of the light source, and the control board is used for providing a driving signal;

the wiring terminal is connected with the partition quantity converter through a first flexible flat cable; the partition quantity converter is connected with the control board through a second flexible flat cable.

6. The display device according to claim 5, wherein the partition number converter includes two upper and lower connection sockets arranged in a stack; the first flexible flat cable is connected between the wiring terminal and the lower layer connecting seat, and the second flexible flat cable is connected between the control board and the upper layer connecting seat.

7. The display device according to claim 6, wherein the lower connection socket includes a plurality of first pins and a plurality of second pins, the first pins and the second pins being alternately arranged;

the upper connecting seat comprises a plurality of third pins and a plurality of fourth pins, and the third pins and the fourth pins are alternately arranged;

the first pin and the second pin which are adjacent form a first pin pair, and the third pin and the fourth pin which are adjacent form a second pin pair; the first pin pair and the second pin pair are in one-to-one correspondence, the first pin pair and the second pin pair which are in mutual correspondence are in one-to-one correspondence, the first pin is electrically connected with the third pin, and the second pin is electrically connected with the fourth pin;

the first pin pairs correspond to the pad pairs one to one, the first pins in the first pin pairs are correspondingly connected with the first pads through the first flexible flat cables, and the second pins are correspondingly connected with the second pads through the first flexible flat cables;

at least one third pin and one fourth pin which are adjacent in the upper layer connecting seat are electrically connected; the electrically connected third pin and the electrically connected fourth pin are respectively located in different second pin pairs.

8. The display device of claim 7, wherein the first flexible flat cable includes a plurality of first gold fingers and a plurality of second gold fingers, the first gold fingers and the second gold fingers being alternately arranged; the first golden fingers correspond to the first pins one by one, and the second golden fingers correspond to the second pins one by one; when the first flexible flat cable is connected with the lower-layer connecting seat, the first golden finger is correspondingly connected with the first pin, and the second golden finger is correspondingly connected with the second pin;

in the third pins, a third pin which is not connected with the fourth pin is a first third pin, and a third pin which is connected with the fourth pin is a second third pin; in the fourth pins, a fourth pin which is not connected with the third pin is a first fourth pin, and a fourth pin which is connected with the third pin is a second fourth pin;

the second flexible flat cable comprises a plurality of third golden fingers and a plurality of fourth golden fingers, and the third golden fingers and the fourth golden fingers are alternately arranged; the third golden fingers correspond to the first third pins one by one, and the fourth golden fingers correspond to the first fourth pins one by one; when the second flexible flat cable is connected with the upper connecting seat, the third golden finger is correspondingly connected with the first third pin, and the fourth golden finger is correspondingly connected with the first fourth pin.

9. The display device according to any one of claims 1 to 8, wherein the circuit board is block-shaped, the light sources are arranged in an array on the circuit board, and the circuit board and the light sources form a lamp panel;

or, the circuit board is strip-shaped, and the backlight module comprises a plurality of circuit boards which are arranged in parallel; the light sources are arranged in a row on the circuit board, and the circuit board and the light sources form a light bar.

10. The display device of claim 9, wherein the light source is an LED or a Mini LED.