CN118502158A - A display device - Google Patents

Abstract

The invention discloses a display device, comprising: a display panel and a backlight module. The backlight module comprises at least one lamp panel; the lamp plate includes: the connecting part is positioned at the same end of the two lamp bars and is respectively connected with the two lamp bars; the connecting part and the two lamp strips all comprise a circuit board, and the connecting part and the circuit boards of the two lamp strips are of an integrated structure. The same end that connecting portion connects two lamp strips constitutes "冂" font structure, when carrying out the panel design of circuit board, can insert one of them lamp strip of two same structure lamp plates between two lamp strips respectively for the circuit board in clearance position between the lamp strip can obtain abundant utilization, reduces the cost of lamp plate from this.

Description

A display device

Technical Field

The present invention relates to the field of display technology, and in particular to a display device.

Background Art

As the current mainstream display screen, LCD screen has the advantages of low power consumption, small size, low radiation, etc. However, LCD panel is a non-self-luminous panel and needs to be used with a backlight module.

The backlight module is divided into an edge-entry backlight module and a direct-type backlight module. The direct-type backlight module has higher brightness than the edge-entry backlight module.

Direct-type backlight modules usually use a light board as the backlight source. Multiple lamp beads are arranged on the light board, and there is a certain distance between adjacent lamp beads. When the distance between the lamp beads increases and the circuit board near the lamp beads is sufficient to meet the wiring requirements, the circuit board between the lamp beads does not need wiring, and the board between the lamp beads is not fully utilized, resulting in low board utilization and high light board cost.

Summary of the invention

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

Display panel, used for image display;

A backlight module, located at the light incident side of the display panel, for providing backlight; the backlight module includes at least one light board;

The light board comprises:

Two light bars, the two light bars are arranged in parallel;

A connecting portion, located at the same end of the two light bars, and connected to the two light bars respectively;

The connecting portion and the two light bars each include a circuit board, and the connecting portion and the circuit boards of the two light bars are an integrated structure.

In some embodiments of the present invention, a plurality of light sources are disposed on the connecting portion and the two light bars;

The light sources on the light bar are arranged along the length direction of the light bar, and the light sources are evenly distributed on the connecting portion and the two light bars; and the intervals between two adjacent light sources are equal.

In some embodiments of the present invention, the light source is LED, Mini LED or Micro LED.

In some embodiments of the present invention, the distance between the two light bars is slightly greater than twice the width of the light bar.

In some embodiments of the present invention, the connecting portion includes an opening that passes through the circuit board, and the light board also includes a first connector, which is arranged at a position corresponding to the opening, and the first connector is used to connect the light board and an external circuit.

In some embodiments of the present invention, the circuit board of the light board includes:

a first substrate;

A first circuit layer, located on one side of the first substrate;

A first solder resist layer is located on a side of the first circuit layer away from the first substrate; a light source of the light board is located on a side of the first solder resist layer away from the first circuit layer, and the light source is electrically connected to the first circuit layer through a window in the first solder resist layer;

The first connector includes a first fixing pin and a first conductive pin; the first fixing pin is used to fix the first connector to a side of the first substrate away from the first circuit layer; the first conductive pin is used to connect the first circuit layer.

In some embodiments of the present invention, the backlight module includes a plurality of light boards, and the plurality of light boards are arranged in sequence along a set direction; the distance between two adjacent light boards is equal to the distance between the two light strips in one of the light boards.

In some embodiments of the present invention, the backlight module further includes:

A connecting plate, located on a side of the lamp board away from the light emitting side; a plurality of second connectors are arranged on the connecting plate, the plurality of second connectors correspond to the first connectors of each lamp board one by one, and the second connectors are used to connect the corresponding first connectors; each lamp board is connected to a power board, a control board or an adapter board of the display device through the connecting plate;

The connecting plate comprises:

A second substrate, disposed opposite to the first substrate;

A second circuit layer is located on a side of the second substrate facing the first substrate;

A second solder resist layer is located on a side of the second circuit layer away from the second substrate;

The second connector includes a second fixing pin and a second conductive pin; the second fixing pin is used to fix the second connector to a side of the second solder resist layer away from the second circuit layer; the second conductive pin is used to connect the second circuit layer.

In some embodiments of the present invention, the backlight module further includes:

A back plate, on which each of the light panels and the connecting plate is located;

The connection portion of each of the light boards is located at the first side of the corresponding light board, and the first side is one side of the light board along the length direction of the light bar; the backlight module includes a connecting plate, and the connecting plate is located between the first side of each of the light boards and the back plate;

Alternatively, the connecting parts of each of the light boards are distributed on a first side and a second side of the light board, and the first side and the second side are two opposite sides of the light board along the length direction of the light strip; the backlight module includes two connecting plates, namely a first connecting plate and a second connecting plate; the first connecting plate is located between the first side of each of the light boards and the back plate, and the second connecting plate is located between the second side of each of the light boards and the back plate.

In some embodiments of the present invention, the backlight module further includes:

A reflective sheet is located on a side of each of the light panels close to the light source; the reflective sheet includes a plurality of openings for exposing the light source.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings introduced below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

FIG1 is a schematic cross-sectional view of a display device provided by an embodiment of the present invention;

FIG2 is a schematic diagram of a cross-sectional structure of a light panel provided in an embodiment of the present invention;

FIG3 is a schematic diagram of a top view of a light panel in the related art;

FIG4 is a second schematic diagram of a top view structure of a light panel in the related art;

FIG5 is a schematic diagram of the plate design of the light board in FIG4;

FIG6 is a schematic diagram of a top view of a light panel provided in an embodiment of the present invention;

FIG7 is a schematic diagram of the plate design of the light board in FIG6;

FIG8 is a schematic diagram of a top view of a light panel arrangement according to an embodiment of the present invention;

FIG9 is a schematic diagram of one of the light board connection methods provided in an embodiment of the present invention;

FIG10 is a partial enlarged view of the connection position between the lamp panel and the connection plate in FIG9;

FIG11 is a schematic cross-sectional view of the connection between a lamp panel and a connecting plate provided in an embodiment of the present invention;

FIG12 is a second schematic diagram of a light board connection method according to an embodiment of the present invention;

FIG13 is a third schematic diagram of a light board connection method according to an embodiment of the present invention;

FIG. 14 is a schematic diagram of the cross-sectional structure of a backlight module provided in an embodiment of the present invention.

Among them, 100-backlight module, 200-display panel, 11-back plate, 12-light board, 12a-light bar, 12b-connecting part, 13-connecting plate, 13a-first connecting plate, 13b-second connecting plate, 14-reflecting sheet, 15-diffuser plate bracket, 16-diffuser plate, 17-optical film, 121, 132-circuit board, 122-light source, 123-first connector, 121a-first substrate, 121b-first circuit layer, 121c-first solder resist layer, 131-second connector, 132a-second substrate, 132b-second circuit layer, 132c-second solder resist layer, K-opening, w-light bar width, H-spacing between light bars, S-spacing between light boards.

DETAILED DESCRIPTION

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention will be further described below with reference to the accompanying drawings and examples. However, the example embodiments can be implemented in various forms and should not be understood as being limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concepts of the example embodiments to those skilled in the art. The same figure marks in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. The words expressing position and direction described in the present invention are all explained with reference to the accompanying drawings as examples, but changes can be made as needed, and the changes made are all included in the scope of protection of the present invention. The drawings of the present invention are only used to illustrate the relative position relationship and do not represent the true proportion.

The liquid crystal display device is mainly composed of a backlight module and a liquid crystal display panel. The liquid crystal display panel itself does not emit light, and needs to rely on the light source provided by the backlight module to achieve brightness display.

The display principle of liquid crystal display devices is to place liquid crystal between two pieces of conductive glass, and rely on the electric field between the two electrodes to drive the electric field effect of the liquid crystal molecules to distort, so as to control the transmission or shielding function of the backlight source, thereby displaying the image. If a color filter is added, a color image can be displayed.

FIG. 1 is a schematic cross-sectional view of a display device provided in an embodiment of the present invention.

As shown in FIG. 1 , the display device includes: a backlight module 100 and a display panel 200 . The backlight module 100 is used to provide a backlight source to the display panel 200 , and the display panel 200 is used to display images.

The backlight module 100 is usually located at the bottom of the display device, and its shape and size are adapted to the shape and size of the display device. When applied to fields such as televisions or mobile terminals, the backlight module usually adopts a rectangular shape.

The backlight module in the embodiment of the present invention is a direct-type backlight module, which is used to emit light evenly in the entire light-emitting surface, and provide the display panel with light of sufficient brightness and even distribution, so that the display panel can display images normally.

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 usually matched with the backlight module. Usually, the display panel 200 can be set to a rectangle, including a sky side, a ground side, a left side and a right side, wherein the sky side is opposite to the ground side, the left side is opposite to the right side, the sky side is connected to one end of the left side and one side of the right side respectively, and the ground side is connected to the other end of the left side and the other end of the right side respectively.

The display panel 200 is a transmissive display panel that can modulate the transmittance of light but does not emit light 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 the light incident to the pixel unit from the backlight module 100, so that the light transmitted by all pixel units constitutes the displayed image.

In specific implementation, the backlight module 100 can adopt an edge-entry backlight module and a direct-type backlight module. The edge-entry backlight module usually adopts a light bar in combination with a light guide plate to provide backlight; while the direct-type backlight module usually adopts a light board as a backlight source. Compared with the edge-entry backlight module, the direct-type backlight module can be equipped with more light sources, has higher brightness, and can cooperate with the regional dimming technology to realize the display of high dynamic range images.

FIG. 2 is a schematic diagram of the cross-sectional structure of a light board provided in an embodiment of the present invention.

As shown in FIG. 2 , a direct-type backlight module generally includes a back plate 11 and a light board 12 located on the back plate.

The back plate 11 is located at the bottom of the backlight module and has a supporting and bearing function. The back plate 11 is usually a square structure. When applied to a special-shaped display device, its shape is adapted to the shape of the display device. The back plate 11 includes a sky side, a ground side, a left side and a right side. The sky side is opposite to the ground side, the left side is opposite to the right side, the sky side is connected to one end of the left side and one side of the right side respectively, and the ground side is connected to the other end of the left side and the other end of the right side respectively.

The back plate 11 is made of aluminum, iron, aluminum alloy or iron alloy, etc. The back plate 11 is used to support the light board 12 and to support and fix the edge positions of the diffuser plate, optical film and other components. The back plate 11 also plays a role in heat dissipation for the light board 12.

In the embodiment of the present invention, the backlight module is a direct-type backlight module, and the light board 12 is located on the backboard 11. Generally, the light board 12 can be square or rectangular as a whole. According to the size of the display device, multiple light boards 12 can be set. In order to avoid optical problems caused by splicing of light boards 12, the joints between adjacent light boards 12 are as small as possible, or even seamless splicing is achieved.

As shown in FIG. 2 , the light board 12 includes a circuit board 121 and a light source 122 disposed on the circuit board 121 .

The circuit board 121 is located on the back plate 11, and the size of the circuit board 121 is the same as that of the light board 12. In the embodiment of the present invention, the circuit board 121 can be a printed circuit board (PCB). According to actual needs, the circuit board 121 can be a single-layer board, a double-layer board or a multi-layer board, which is not limited here.

The light source 122 is located on the circuit board 121 and is electrically connected to the circuit layer in the circuit board 121. In an embodiment of the invention, the light source 122 may be a light emitting diode (Light Emitting Diode, LED for short), a Mini LED (Mini Light Emitting Diode, Mini LED for short) or a Micro LED (Micro Light Emitting Diode, MicroLED for short). Mini LED and Micro LED are different from ordinary light emitting diodes. They specifically refer to micro light emitting diode chips, and the size of Micro LED is smaller than that of Mini LED. Since the size of Mini LED and Mini LED is very small, it is beneficial to control the dynamic light emission of the backlight module to a smaller partition and improve the dynamic contrast of the picture. In an embodiment of the present invention, the single-side size of a single Mini LED chip is less than 500μm, and the single-side size of a single Micro LED chip is less than 100μm.

LED, Mini LED and Micro LED can adopt a structure with a packaging bracket (such as a POB packaging structure) or a structure without a bracket (such as a CSP packaging structure), which is not limited here.

In practical applications, the light panel 12 may include light sources of only one color, or may include light sources of multiple colors, which is not limited here.

In practical applications, there are two conventional light board driving and power supply methods, one is the common light board type, and the other is the separate light board type. Both methods require setting up a connecting line device on the front or back of the light board to realize power supply and signal drive, so as to realize the backlight array partition control function.

At present, the backlight industry is developing towards thinner, lower cost and lower energy consumption. The current situation in the industry is that high-end models use block-shaped light boards, and mid-range models use comb-shaped light boards. Figure 3 is one of the top view structural diagrams of the light board in the related art; Figure 4 is the second top view structural diagram of the light board in the related art.

High-end display devices usually require more light sources, and the spacing between adjacent light sources is smaller. In order to cooperate with more sophisticated regional dimming, the circuit design is usually more complicated, so block light boards are required. As shown in Figure 3, the shape of the block light board can be the same as the shape of the backlight module, or it can be formed by splicing multiple block light boards to form the shape of the backlight module. The circuit board of the block light board is a whole piece. When designing the board, it will only be cut according to the size of the light board, and the cut light board will no longer be composed. The material consumption of such a light board is relatively higher. Taking a 65-inch display device as an example, the light board material consumption is about 1.13 square meters per unit.

Mid-range display devices usually require fewer light sources than high-end models, the distance between adjacent light sources is larger, and the number of light source partitions is less than that of high-end models, so the circuit design is relatively simple. The gaps between adjacent light sources may not require circuits, so the circuit board can be designed into a comb shape, thereby reducing the consumption of light board materials. As shown in Figure 4, the comb-shaped light board is a comb shape formed by connecting one end of multiple light strips, and the board between adjacent light strips can be removed to reduce the consumables of the light board. The material consumption of the comb-shaped light board is lower than that of the block-shaped light board. Taking the 65-inch display device as an example, the light board material consumption is about 0.8 square meters per unit.

FIG. 5 is a schematic diagram of the plate design of the light board in FIG. 4 .

When designing the board material of a comb-shaped light board, a block-shaped circuit board is designed into two interlocking comb-shaped circuit boards, which are formed by cutting off the unnecessary circuit boards in the gap between the comb teeth. However, even though the comb-shaped light board can reduce the consumption of light board materials to a certain extent compared with the block-shaped light board, some light board materials are still not fully utilized.

In view of this, an embodiment of the present invention provides a light board structure, which can fully utilize the light board material and further reduce the cost of the light board.

FIG. 6 is a schematic diagram of a top view of the structure of a lamp board provided in an embodiment of the present invention; FIG. 7 is a schematic diagram of a plate material design of the lamp board in FIG. 6 .

As shown in FIG. 6 , the light board 12 provided in the embodiment of the present invention includes: two light bars 12 a and a connecting portion 12 b connecting the two light bars.

The two light bars 12a are arranged parallel to each other, and the connecting portion 12b is located at the same end of the two light bars 12a and is connected to the two light bars 12a respectively. The connecting portion 12b and the two light bars 12a both include a circuit board 121, and the connecting portion 12b and the circuit boards 121 of the two light bars 12a are an integrated structure.

The circuit board pattern in the embodiment of the present invention is obtained through board design. Since one light board only includes two light strips 12a, and the connecting portion 12b connects the same end of the two light strips 12a to form a "冂"-shaped structure, when designing the board of the circuit board, as shown in FIG. 7, one of the light strips of two light boards with the same structure can be inserted between the two light strips 12a, so that the circuit board in the gap position between the light strips can be fully utilized, thereby reducing the cost of the light board.

The lamp board provided by the embodiment of the present invention can improve the utilization rate of the comb-shaped lamp board by 23% when manufacturing lamp boards of the same size. When manufacturing a 65-inch display device, the material consumption of the lamp board structure provided by the embodiment of the present invention is about 0.45 square meters per unit.

As shown in FIG6 , a plurality of light sources 122 are provided on the connecting portion 12b and the two light bars 12a. Among them, the light sources 122 on the light bar 12a are arranged in a row along the length direction of the light bar, and the light sources on the connecting portion 12b are arranged in two rows and two columns, wherein each row of light sources continues to be arranged along the arrangement direction of the light sources on the light bar. The light sources 122 are evenly distributed on the connecting portion 12b and the two light bars 12a, and the spacing p between two adjacent light sources 122 is equal. The circuit boards of the connecting portion 12b and the light bar 12a are an integrated structure, and the circuits in the circuit boards can be interconnected as needed. Light sources are provided on both the connecting portion 12b and the light bar 12a, which can improve the utilization rate of the circuit board. Generally, the connection relationship between the light sources on the light board needs to be determined according to the partitions. The light sources in the same partition are connected in series, and the light sources in different partitions are connected in parallel.

As shown in FIG. 7 , the spacing H between the two light strips 12a in the light board 12 is slightly larger than twice the width w of the light strip. Thus, when designing the plate of the light board, a light board 12 is connected above and below the two light strips 12a of each light board 12 to fully utilize the plate.

FIG. 8 is one of the schematic top view structural diagrams of the arrangement of light panels provided in an embodiment of the present invention.

In specific implementation, a direct-type backlight module usually requires multiple light strips to illuminate the entire display area. As shown in FIG8 , the backlight module includes multiple light panels 12, and the multiple light panels 12 are arranged in sequence along a set direction (vertical direction in FIG8 ), and the spacing S between two adjacent light panels 12 is equal to the spacing H between two light strips 12a in one light panel. In this way, the light source in the backlight module can be evenly distributed, thereby providing uniform backlight.

In order to connect these lamp boards 12 with external circuits to power or electrically drive the lamp boards 12, as shown in Figure 6, a first connector 123 is provided on each lamp board 12, and the connecting part 12b includes an opening K passing through the circuit board. The first connector 123 is arranged at a position corresponding to the opening K, and the first connector 123 is used to connect the lamp board 12 and the external circuit.

Generally, the light board uses a flexible flat cable (FFC) to connect to the external circuit. However, when the light board in the embodiment of the present invention is used as a backlight source, a large number of light strips need to be set, resulting in a large number of wires being used in the backlight module. In view of this, the embodiment of the present invention also provides a new connection structure for reducing the use of wires in the backlight module.

FIG. 9 is one of the schematic diagrams of the lamp board connection method provided in an embodiment of the present invention, and FIG. 10 is a partial enlarged diagram of the connection position of the lamp board and the connection board in FIG. 9 .

As shown in FIG9 , the backlight module further includes: a connection plate 13, which is located on the side of the lamp board 12 away from the light emitting side. As shown in FIG10 , a plurality of second connectors 131 are provided on the connection plate 13, and the plurality of second connectors 131 correspond to the first connectors 123 of each lamp board 12 one by one, and the second connectors 131 are used to connect to the corresponding first connectors 123. Each lamp board 12 is connected to the power board, control board or adapter board of the display device through the connection plate 13.

As shown in FIG9 , the connection board 13 can be a strip structure, and its extension direction is perpendicular to the extension direction of the light board 12. The connection board does not need to be set too wide, and is used to connect with the circuits of each light board, replacing the FFC used when connecting each light board, reducing the use of wires in the backlight module. A plurality of second connectors can be set on the connection board to respectively connect to the first connectors of each light board. In addition, a third connector can be set on the connection board, and the third connector can be connected to the FFC, so that the connection board is connected to the power board, the control board or the adapter board.

FIG. 11 is a schematic diagram of the cross-sectional structure of the connection between the lamp board and the connecting plate provided in an embodiment of the present invention.

In a specific implementation, both the circuit board and the connecting board of the light board can be PCBs, and in order to reduce costs, a single-layer PCB can be used, that is, the PCB includes only one circuit layer. As shown in FIG11 , the circuit board 121 of the light board includes: a first substrate 121a, a first circuit layer 121b, and a first solder resist layer 121c. The circuit board 132 of the connecting board includes: a second substrate 132a, a second circuit layer 132b, and a second solder resist layer 132c.

The first substrate 121a and the second substrate 132a have a bearing function, and their shape and size are the same as those of the circuit board, and can usually be set to a rectangular or square shape. The first substrate 121a and the second substrate 132a can be made of BT, FR4, aluminum, glass or flexible materials, etc., and are selected according to the application scenario, and are not limited here.

The first circuit layer 121b is located on the first substrate 121a, the second substrate 132a is arranged opposite to the first substrate 121a, and the second circuit layer 132b is located on the side of the second substrate 132a facing the first substrate 121a. The first circuit layer on the first substrate and the second circuit layer on the second substrate are both used to transmit driving signals. The circuit layer can usually be formed by copper coating on the substrate and then patterning.

The first solder resist layer 121c is located on the side of the first circuit layer 121b away from the first substrate 121a; the light source 122 of the light board is located on the side of the first solder resist layer 121c away from the first circuit layer 121b, and the light source 122 is electrically connected to the first circuit layer 121b through the window of the first solder resist layer 121c. The second solder resist layer 132c is located on the side of the second circuit layer 132b away from the second substrate 132a. The solder resist layer is located on the side of the circuit layer away from the substrate, and is used to insulate and protect the circuit layer. The solder resist layer is usually made of insulating material coated on the surface of the circuit layer, and can be made of materials such as ink, which is not limited here.

In the embodiment of the present invention, the connection plate is arranged on the lower side of each lamp board, specifically between the lamp board and the back plate, and the first connector 123 on the lamp board includes a first fixing pin and a first conductive pin; wherein the first fixing pin is used to fix the first connector 123 to the side of the first substrate 121a away from the first circuit layer 121b; the first conductive pin is used to connect the first circuit layer 121b. Similarly, the second connector 131 includes a second fixing pin and a second conductive pin; wherein the second fixing pin is used to fix the second connector 131 to the side of the second solder resist layer 132c away from the second circuit layer 132b; the second conductive pin is used to connect the second circuit layer 132b.

By pressing the first connector against the lower surface of the circuit board of the light board, the interference with the light caused by the first connector protruding from the surface of the circuit board and the unevenness of the circuit board surface can be avoided. By pressing the second connector against the upper surface of the connecting plate, the two connectors are adapted so that the first connector of the light board can be inserted into the corresponding second connector on the connecting plate. This not only realizes the line connection between the light boards, but also makes the surface of the circuit board in each light board smoother, which is conducive to the subsequent setting of structures such as reflective sheets.

FIG. 12 is a second schematic diagram of a light board connection method provided in an embodiment of the present invention; FIG. 13 is a third schematic diagram of a light board connection method provided in an embodiment of the present invention.

In some embodiments, as shown in FIG9 , the connection portion of each light board is located on the first side of the light board, and the first side is one side of the light board along the length direction of the light bar. Taking FIG9 as an example, the length direction of each light bar is the horizontal direction, and the connection portion of each light board is located on the left side of the light board. In this case, the backlight module can be provided with only one connection plate 13, so that the connection plate is connected to the first connector of each light board.

In some embodiments, as shown in FIG. 12 and FIG. 13, the connection parts of each light board are distributed on the first side and the second side of the light board, and the first side and the second side are two opposite sides of the light board along the length direction of the light bar. Taking FIG. 12 as an example, the length direction of the light bar is the horizontal direction, the left side of the light board is the first side, and the right side of the light board is the second side; wherein the connection parts of the first three light boards are located on the left side, and the connection parts of the last three light boards are located on the right side; or taking FIG. 13 as an example, the light boards whose connection parts are located on the left side and on the right side can be arranged alternately. At this time, the backlight module can be provided with two connection plates, namely, the first connection plate 13a and the second connection plate 13b; the first connection plate 13a is located between the first side (the left side in FIG. 12 and FIG. 13) of each light board and the back plate, and the second connection plate 13b is located between the second side (the right side in FIG. 12 and FIG. 13) of each light board and the back plate. By providing two connection plates, the number of second connectors on each connection plate can be reduced, and connection plates can also be provided between both sides of the light board and the back plate to ensure the stability of the structure.

FIG. 14 is a schematic diagram of the cross-sectional structure of a backlight module provided in an embodiment of the present invention.

As shown in FIG. 14 , the backlight module further includes: a reflective sheet 14 , a diffuser plate bracket 15 , a diffuser plate 16 and an optical film 17 .

The reflective sheet 14 is located on a side of each light board 12 close to the light source 122; the reflective sheet 14 includes a plurality of openings for exposing the light source. The reflective sheet 14 can reflect the light emitted by the light source 122 to the side of the back plate 11 and the light reflected by the diffuser 16 or the optical film 17 back to the side of the back plate 11 back to the light emitting side of the light board, thereby improving the utilization efficiency of the light source.

Since the first connectors of the light boards are all arranged on the lower surface of the circuit board in the embodiment of the present invention, the light emitting side surface of the circuit board of each light board is flat, which can ensure the flat attachment of the reflective sheet.

The diffuser bracket 15 can be arranged on the reflective sheet 14, or an opening can be arranged on the reflective sheet 14 so that the diffuser bracket 15 is fixed to the back plate 11 through the opening. The diffuser bracket 15 plays a role in supporting the diffuser 16. The diffuser bracket 15 can be arranged at a spaced position between light sources, and the diffuser bracket 15 can be made of a transparent material or a reflective material, which is not limited here.

The diffuser 16 is located at the light-emitting side of the lamp board 12 and is at a certain distance from the lamp board 12. The distance is set to allow sufficient light mixing between the light sources on the lamp board. The function of the diffuser 16 is to scatter the incident light so that the light passing through the diffuser 16 is more uniform.

The diffuser 16 is provided with scattering particle material, and the light incident on the scattering particle material will be refracted and reflected continuously, thereby achieving the effect of scattering the light and achieving the effect of uniform light. The thickness of the diffuser is usually set to 0.5mm-3mm. The thicker the diffuser, the greater the haze and the better the uniform effect.

The diffusion plate 16 can usually be processed by an extrusion process, and the material used for the diffusion plate 16 is generally selected from at least one of polymethyl methacrylate PMMA, polycarbonate PC, polystyrene material PS, and polypropylene PP.

In the embodiment of the present invention, the light board 12 can be used to emit blue light. In this case, the diffusion plate 16 can be a quantum dot diffusion plate, which is used to achieve color conversion and diffusion functions.

The optical film 17 is located on the side of the diffuser 16 away from the light board 12. The size of the optical film 17 is adapted to the display device, slightly smaller than the display device, and is usually set in a rectangular or square shape. In specific implementation, the optical film 17 includes one or a combination of fluorescent film, quantum film, prism film, and brightness enhancement film, etc., and is set according to specific needs, which is not limited here.

According to the first invention concept, the light board includes: two light bars and a connecting portion connecting the two light bars. Since one light board includes only two light bars, the connecting portion connects the same end of the two light bars to form a "冂"-shaped structure. When designing the board material of the circuit board, one of the light bars of two light boards with the same structure can be inserted between the two light bars, so that the circuit board in the gap between the light bars can be fully utilized, thereby reducing the cost of the light board.

According to the second invention concept, a plurality of light sources are provided on the connecting portion and the two light bars. The light sources on the light bar are arranged in a row along the length direction of the light bar, and the light sources on the connecting portion are arranged in two rows and two columns, wherein each row of light sources continues to be arranged along the arrangement direction of the light sources on the light bar. The light sources are evenly distributed on the connecting portion and the two light bars, and the spacing between two adjacent light sources is equal. The circuit boards of the connecting portion and the light bar are an integrated structure, and the circuits in the circuit board can be interconnected as needed. Light sources are provided on both the connecting portion and the light bar, which can improve the utilization rate of the circuit board.

According to the third invention concept, the distance between two light strips in the light board is slightly larger than twice the width of the light strip, so that one of the light strips of the two light boards can be inserted between the two light strips of each light board, so that the board can be fully utilized.

According to the fourth invention, the backlight module includes a plurality of light boards, which are arranged in sequence along a set direction, and the spacing between two adjacent light boards is equal to the spacing between two light strips in one light board. In this way, the light sources in the backlight module can be evenly distributed, thereby providing uniform backlight.

According to the fifth inventive concept, each lamp board is provided with a first connector, the connecting portion includes an opening penetrating the circuit board, the first connector is provided at a position corresponding to the opening, and the first connector is used to connect the lamp board with an external circuit.

According to the sixth invention concept, the backlight module further includes a connecting plate, which is located on the side of the lamp board away from the light emitting side. A plurality of second connectors are provided on the connecting plate, and the plurality of second connectors correspond one-to-one to the first connectors of each lamp board, and the second connectors are used to connect the corresponding first connectors. Each lamp board is connected to a power board, a control board or an adapter board of the display device through the connecting plate. The connecting plate replaces the FFC used to connect each lamp board, thereby reducing the use of wires in the backlight module.

According to the seventh invention, the first connector is pressed against the lower surface of the circuit board of the light board, which can avoid the interference of the first connector protruding from the surface of the circuit board and the unevenness of the circuit board surface. The second connector is pressed against the upper surface of the connecting plate, and the two connectors are adapted to be arranged so that the first connector of the light board can be inserted into the corresponding second connector on the connecting plate. In this way, not only can the line connection between the light boards be realized, but also the surface of the circuit board in each light board can be made flatter, which is conducive to the subsequent arrangement of structures such as reflective sheets.

According to the eighth invention, the connection parts of the lamp boards are located on the same side of the lamp board, and only one first connector of the lamp boards needs to be provided to connect the lamp boards.

According to the ninth invention, the connection parts of each lamp board are distributed on both sides of the lamp board, and two connection plates are provided to respectively connect the first connectors on both sides. By providing two connection plates, the number of second connectors on each connection plate can be reduced, and connection plates can also be provided between both sides of the lamp board and the back plate to ensure the stability of the structure.

According to the tenth invention concept, the backlight module also includes a reflective sheet. Since the first connectors of the light boards are all arranged on the lower surface of the circuit board, the light emitting side surface of the circuit board of each light board is flat, which can ensure the flat attachment of the reflective sheet.

Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

1. A display device, comprising:

A display panel for displaying an image;

the backlight module is positioned on the light incident side of the display panel and is used for providing backlight; the backlight module comprises at least one lamp panel;

the lamp panel includes:

The two lamp bars are arranged in parallel;

The connecting part is positioned at the same end of the two lamp bars and is respectively connected with the two lamp bars;

The connecting part and the two lamp strips comprise circuit boards, and the connecting part and the circuit boards of the two lamp strips are of an integrated structure.

2. The display device according to claim 1, wherein a plurality of light sources are provided on each of the connection portion and the two light bars;

The light sources on the light bars are arranged along the length direction of the light bars, and the light sources are uniformly distributed on the connecting part and the two light bars; the distance between two adjacent light sources is equal.

3. The display device of claim 2, wherein the light source is an LED, mini LED, or Micro LED.

4. The display device of claim 1, wherein a spacing between the two light bars is slightly greater than 2 times a width of the light bars.

5. The display device according to any one of claims 1 to 4, wherein the connection portion includes an opening penetrating through the circuit board, the lamp panel further includes a first connector disposed at a position corresponding to the opening, and the first connector is configured to communicate the lamp panel with an external circuit.

6. The display device of claim 5, wherein the circuit board of the light panel comprises:

A first substrate;

the first circuit layer is positioned on one side of the first substrate;

The first solder mask layer is positioned on one side of the first circuit layer, which is away from the first substrate; the light source of the lamp panel is positioned at one side of the first solder mask layer, which is away from the first circuit layer, and is electrically connected with the first circuit layer through the window of the first solder mask layer;

The first connector comprises a first fixed pin and a first conductive pin; the first fixing pins are used for fixing the first connector on one side of the first substrate, which is away from the first circuit layer; the first conductive pin is used for connecting the first circuit layer.

7. The display device of claim 6, wherein the backlight module comprises a plurality of light panels sequentially arranged along a set direction; the distance between two adjacent lamp panels is equal to the distance between two lamp bars in one lamp panel.

8. The display device of claim 7, wherein the backlight module further comprises:

The connecting plate is positioned at one side of the lamp panel, which is away from the light emitting side; the connecting plate is provided with a plurality of second connectors, the second connectors are in one-to-one correspondence with the first connectors of the lamp panels, and the second connectors are used for connecting the corresponding first connectors; each lamp panel is connected with a power panel, a control panel or an adapter panel of the display device through the connecting plate;

the connection plate includes:

A second substrate disposed opposite to the first substrate;

The second circuit layer is positioned on one side of the second substrate facing the first substrate;

the second solder mask layer is positioned on one side of the second circuit layer, which is away from the second substrate;

The second connector comprises a second fixed pin and a second conductive pin; the second fixing pin is used for fixing the second connector on one side of the second solder mask layer, which faces away from the second circuit layer; the second conductive pin is used for connecting the second circuit layer.

9. The display device of claim 8, wherein the backlight module further comprises:

The back plate, each lamp panel and the connecting plate are positioned on the back plate;

The connecting parts of the lamp panels are positioned on the first sides of the corresponding lamp panels, and the first sides are one sides of the lamp panels along the length direction of the lamp bars; the backlight module comprises a connecting plate, wherein the connecting plate is positioned between the first side of each lamp panel and the backboard;

or the connecting parts of the lamp panels are distributed on a first side and a second side of the lamp panels, wherein the first side and the second side are two opposite sides of the lamp panels along the length direction of the lamp strip; the backlight module comprises two connecting plates, namely a first connecting plate and a second connecting plate; the first connecting plate is located between the first side of each lamp panel and the backboard, and the second connecting plate is located between the second side of each lamp panel and the backboard.

10. The display device of claim 8, wherein the backlight module further comprises:

The reflecting plate is positioned at one side of each lamp panel close to the light source; the reflective sheet includes a plurality of openings for exposing the light source.