Backlight module and display device

Abstract

The invention provides a backlight module and a display device. The backlight module comprises a back plate, a side plate, a light bar, a connector and a power line. The light bar is arranged on the edge of the inner surface of the back plate and provided with a plurality of light beads, and a plurality of conductive pads electrically connected with the light beads are arranged on the back face of the light bar and arranged in the length direction of the light bar. A plurality of elastic conducting strips are arranged on the face, facing the light bar, of the connector and make contact with the conducting pads, and at least one part of the connector is arranged on the inner surface of the back plate. The power line is electrically connected with the connector. According to the backlight module, a plug pin female head structure on a traditional light bar is omitted, and circuit connection is achieved through direct contact between the elastic conducting strip of the connector and the conducting pad on the back face of the light bar. The connector does not protrude out of the outer surface of the back plate, so that the thickness of the ground side of the display device is prevented from being increased, the display device is light and thin, meanwhile, the material cost of the light bar is reduced, and the assembly process is simplified.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a backlight module and a display device. Background Art

[0002] The backlight module of the Liquid Crystal Display (LCD) provides light source for the LCD panel, and the light source is generated by a light bar (LB).

[0003] like Figures 1 to 5 As shown, the light bar 502 of the backlight module is fixed on the back panel 501 of the backlight module, an opening 5011 is partially provided on the back panel, a female plug 503 is provided on the light bar, and a power cord 505 of the backlight module is connected to the female plug 503 of the light bar through the male plug 504 to realize circuit conduction, thereby supplying power to the light bar.

[0004] This conventional structure has an obvious disadvantage: additional space needs to be reserved in the LCD to accommodate the female plug 503, which increases the thickness of the LCD from size S1 to size S2. This not only hinders the overall thinness of the LCD, but also increases the material cost.

[0005] Therefore, it is necessary to propose a new technical solution to solve the above technical problems. Summary of the invention

[0006] The purpose of the embodiments of the present application is to provide a backlight module and a display device, aiming to avoid an increase in the thickness of the ground side of the display device.

[0007] An embodiment of the present application provides a backlight module, which includes: a back panel; a side panel connected to the back panel; a light bar arranged on the inner surface of the back panel and located at the edge of the back panel, the light bar being provided with a plurality of lamp beads, a side of the light bar facing away from the lamp beads being provided with a plurality of conductive pads, the plurality of conductive pads being electrically connected to the plurality of lamp beads, and the plurality of conductive pads being arranged along the length direction of the light bar; a connector, a side of the connector facing the light bar being provided with a plurality of elastic conductive sheets, the elastic conductive sheets being in contact with the conductive pads, and at least a portion of the connector being provided on the inner surface of the back panel; and a power cord, the power cord being electrically connected to the connector.

[0008] In the above backlight module, a slot is provided at the connection between the back plate and the side plate, and a part of the connector is inserted into the slot.

[0009] In the above backlight module, the connector is provided with at least one magnetic adsorption portion, and the magnetic adsorption portion is adsorbed to the side plate.

[0010] In the above backlight module, at least one of the magnetic adsorption portions is disposed at at least one end of the connector in the length direction.

[0011] In the above backlight module, the connector is provided with at least one locking portion, and the locking portion is locked to the side plate.

[0012] In the above backlight module, at least one of the locking portions is disposed at at least one end of the connector in the length direction.

[0013] In the above backlight module, the connector is provided with at least one locking portion, and the locking portion is locked with the side plate.

[0014] In the above backlight module, at least one of the locking portions is disposed at at least one end of the connector in the length direction.

[0015] In the above-mentioned backlight module, a protrusion is provided at the edge of the back plate and protrudes in a direction perpendicular to the plane where the back plate is located; a notch is provided on the side of the connector facing the light bar; wherein the protrusion is embedded in the space enclosed by the notch and the side of the light bar facing away from the lamp beads.

[0016] In the above backlight module, a portion of the connector inserted into the slot is disposed between the protruding portion and the side plate.

[0017] In the above backlight module, in a direction perpendicular to the plane where the back plate is located and pointing from the inner surface of the back plate to the outer surface of the back plate, the connector does not protrude from the outer surface of the back plate.

[0018] An embodiment of the present application provides a display device, which includes a display panel and the above-mentioned backlight module, and the display panel and the backlight module are overlapped.

[0019] The backlight module and display device provided by the present application realize circuit connection by arranging multiple conductive pads on the side of the light bar facing away from the lamp beads, and using a connector with an elastic conductive sheet to contact the conductive pads, thereby replacing the structural method in which a female plug is arranged on the light bar and a power cord is connected to the light bar through a male plug in the traditional backlight module, thereby effectively solving the technical problem of increased thickness of the ground side of the display device due to the traditional structure, and having significant technical effects.

[0020] First, the technical solution provided by this application eliminates the plug-in female structure on the traditional light bar and sets a flat conductive pad on the back of the light bar instead, making the structure of the light bar itself more concise and flat. The conductive pad can be directly set or attached to the substrate of the light bar, which hardly increases the thickness of the light bar and greatly reduces the space occupied compared to the traditional three-dimensional protruding plug-in female structure. This design makes the light bar structure itself thinner and lighter.

[0021] Secondly, the present application uses the elastic conductive sheet on the connector to directly contact the conductive pad on the light bar to achieve electrical connection, rather than the traditional plug connection method. The design of the elastic conductive sheet enables it to maintain a small footprint while ensuring the reliability of the electrical connection. The elastic conductive sheet can be designed into a bow shape or other elastic structure to form a reliable pressure contact between the connector and the light bar, ensuring a stable electrical connection without the need for a large connection structure.

[0022] More importantly, at least a portion of the connector in the present application is disposed on the inner surface of the back panel, and in a direction perpendicular to the plane of the back panel and pointing from the inner surface of the back panel to the outer surface, the connector does not protrude from the outer surface of the back panel. This technical solution cleverly utilizes the space inside the back panel, hiding the connector in the structural space formed by the back panel and the side panel, avoiding the problem that the traditional connector needs to protrude additionally on the side of the display device. The connector can be fixed by inserting it into a slot at the connection between the back panel and the side panel, using a magnetic adsorption portion to adsorb the side panel, locking it to the side panel by a locking portion, or clamping it with the side panel by a clamping portion, ensuring a stable connection without increasing the external dimensions of the display device.

[0023] In addition, the protrusion on the edge of the back panel matches the notch on the connector, so that the connector can accurately dock with the conductive pad on the light bar, while further optimizing the space utilization and firmly confining the connector in the internal space of the back panel. This technical solution not only solves the electrical connection problem, but also cleverly handles the mechanical fixation problem, realizing an integrated solution.

[0024] In summary, the backlight module and display device provided by the present application avoid the increase in the thickness of the ground side of the display device, thereby realizing the thinness and lightness of the display device; at the same time, since the female plug structure on the light bar is eliminated, the material cost of the light bar is also reduced; in addition, the assembly process of the backlight module is simplified, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an isometric view of a conventional display device;

[0026] Figure 2 for Figure 1 An enlarged view of area A in FIG.

[0027] Figure 3 for Figure 1 A schematic diagram of a light bar provided with a female plug in a display device shown;

[0028] Figure 4 for Figure 3 An enlarged view of region B in FIG.

[0029] Figure 5 is a cross-sectional view of a portion of a conventional display device;

[0030] Figure 6 An isometric view of a display device provided for an embodiment of the present application;

[0031] Figure 7 for Figure 6 An enlarged view of region C in FIG.

[0032] Figure 8 for Figure 6 A schematic diagram of a light bar in a display device shown;

[0033] Fig. 9 A cross-sectional view of a portion of a display device provided in an embodiment of the present application;

[0034] Fig.10 for Fig. 9 A schematic diagram of a first connector fixing method in a display device shown;

[0035] Fig.11 for Fig. 9 A schematic diagram of a second connector fixing method in a display device shown;

[0036] Fig.12 A cross-sectional view of a portion of a display device provided in an embodiment of the present application;

[0037] Fig.13 for Fig.12 A schematic diagram of a first connector fixing method in a display device shown;

[0038] Fig.14 for Fig.12 A schematic diagram of a second connector fixing method in a display device shown;

[0039] Fig.15 is a block diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The specific implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0041] The terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise clearly defined.

[0042] The embodiments of the present application may be combined with each other.

[0043] like Fig.15 As shown, the display device provided in the embodiment of the present application includes a display panel, a timing controller TCON, a source driving circuit DD and a power management chip (not shown in the figure, the power management chip can be integrated with the timing controller TCON into the same chip). The display panel can be, for example, a liquid crystal display panel.

[0044] The display panel includes a display area and a non-display area. The display area is provided with m×n pixels P arranged in an array, where m and n are integers greater than 1. The non-display area is located around the display area and is used to arrange the drive circuit and various signal lines. The display panel also includes a plurality of scan lines (GL1~GLn), a plurality of data lines (DL1~DLm) and a gate drive circuit GOA. The plurality of scan lines (GL1~GLn) extend along a first direction and are arranged along a second direction, and the plurality of data lines (DL1~DLm) extend along a second direction and are arranged along the first direction, and the first direction is perpendicular to the second direction. The gate drive circuit GOA is arranged in the non-display area and is electrically connected to the plurality of scan lines (GL1~GLn). The source drive circuit DD is electrically connected to the plurality of data lines (DL1~DLm) through a flexible circuit board. The timing controller TCON is electrically connected to the gate drive circuit GOA and the source drive circuit DD respectively.

[0045] The display panel includes a thin film transistor array substrate, an opposing substrate, and a liquid crystal layer disposed between the two substrates. The thin film transistor array substrate includes a glass substrate, a first metal layer disposed on the glass substrate, a gate insulating layer disposed on the first metal layer, a semiconductor layer disposed on the gate insulating layer, a second metal layer disposed on the semiconductor layer, a passivation layer disposed on the second metal layer, and a pixel electrode disposed on the passivation layer. The first metal layer includes scan lines (GL1~GLn), gate electrodes, etc. The second metal layer includes data lines (DL1~DLm), source electrodes, drain electrodes, etc. The opposing substrate includes a glass substrate, a black matrix disposed on the glass substrate, a color filter layer disposed on the black matrix, and a common electrode disposed on the color filter layer.

[0046] Each pixel P includes at least one thin film transistor and a pixel electrode. The gate of the thin film transistor is electrically connected to the corresponding scan line, the source is electrically connected to the corresponding data line, and the drain is electrically connected to the corresponding pixel electrode. When the scan line outputs a high-level scan signal, the thin film transistor is turned on, and the data signal on the data line is transmitted to the pixel electrode through the thin film transistor; when the scan line outputs a low-level scan signal, the thin film transistor is turned off, and the pixel electrode maintains the voltage corresponding to the data signal.

[0047] The gate drive circuit GOA includes n-stage cascaded gate drive subcircuits, and each stage of the gate drive subcircuit is electrically connected to a scan line. Under the control of the timing controller TCON, the gate drive subcircuit outputs scan signals in sequence to scan each row of pixels P in the display area line by line. Under the control of the timing controller TCON, the source drive circuit DD generates and outputs data signals according to the image data. The timing controller TCON is used to receive and process externally input image data and timing signals, generate control signals, and transmit image data to the source drive circuit DD. The power management chip is used to provide operating voltages for various parts of the display device, including providing a common voltage for the common electrode of the liquid crystal display panel, providing a gate drive voltage for the gate drive circuit GOA, and providing a gamma voltage for the source drive circuit DD.

[0048] like Figures 6 to 14 As shown, an embodiment of the present application provides a display device, which includes a display panel 202 and a backlight module 201, and the display panel 202 and the backlight module 201 are superimposed. The display device can be applied to devices such as televisions, monitors, laptops or tablet computers. The display panel 202 can be a liquid crystal display panel 202 of different modes such as TN, VA, IPS, etc. The display panel 202 realizes image display through the light source provided by the backlight module 201.

[0049] In the embodiments of the present application, Figures 8 to 14 As shown, a plurality of conductive pads 2014 are added to the back of the light bar 2013 of the backlight module 201 , and the conductive pads 2014 of the light bar 2013 are in contact with the elastic conductive sheet 2016 of the connector 2015 to achieve circuit conduction.

[0050] Specifically, Fig. 9 , Fig.12As shown, the backlight module 201 includes a back plate 2011, a side plate 2012, a light bar 2013, a connector 2015 and a power line 2017. The side plate 2012 is connected to the back plate 2011 to form a frame of the backlight module 201. The side plate 2012 can be fixedly connected to the back plate 2011 by means of snaps, screws or welding, or can be integrally formed with the back plate 2011 to form a semi-enclosed space for accommodating components such as a light guide plate and a light bar 2013. The inner surfaces of the back plate 2011 and the side plates 2012 can be provided with reflective materials to improve the utilization rate of light. The light bar 2013 is arranged on the inner surface of the back plate 2011 and is located at the edge of the back plate 2011, and the light bar 2013 is a light emitting diode light bar 2013. The light bar 2013 is provided with a plurality of lamp beads, which are light-emitting devices. The light-emitting surface of the lamp beads of the light bar 2013 faces the light guide plate of the backlight module 201. The light bar 2013 can be fixed on the inner surface of the back plate 2011 by means of double-sided adhesive, buckles or screws. The back side of the light bar 2013 (i.e., the side facing away from the lamp beads) is provided with a plurality of conductive pads 2014, which are electrically connected to the plurality of lamp beads, and the plurality of conductive pads 2014 are arranged in an array along the length direction of the light bar 2013. The plurality of elastic conductive sheets 2016 are in one-to-one contact with the plurality of conductive pads 2014. The backlight module 201 also includes a reflector, which is arranged between the light bar 2013 and the back plate 2011.

[0051] The conductive pad 2014 is made of copper foil with a gold layer on the surface to improve the conductivity and prevent oxidation. The conductive pad 2014 is connected to the circuit of the lamp bead through a metal wire, and the metal wire is buried inside the substrate of the light bar 2013. The thickness of the conductive pad 2014 can be designed differently in different areas of the light bar 2013, and the width and thickness of the conductive pad 2014 can be adjusted according to the current size to ensure the stability of current transmission.

[0052] The edge of the back plate 2011 is provided with a protrusion 20111 protruding in a direction perpendicular to the plane where the back plate 2011 is located. The protrusion 20111 extends along the length direction of the light bar 2013. The protrusion 20111 is integrally formed of the same metal material as the back plate 2011, and the surface can be sandblasted or anodized to increase the friction with the contact surface of the connector 2015 and improve the fixing stability. The cross section of the protrusion 20111 is set to be rectangular, trapezoidal or T-shaped.

[0053] A slot is provided at the connection between the back plate 2011 and the side plate 2012, and the slot is located at the connection between the back plate 2011 and the side plate 2012. The inner wall of the slot is provided with a guide angle to guide the connector 2015 to be inserted accurately and reduce wear during the installation process. The shape of the slot is set to an asymmetric structure to prevent the connector 2015 from being inserted in reverse. In an embodiment of the present application, a reinforcing rib is provided at the slot at the connection between the back plate 2011 and the side plate 2012 to enhance the durability of the slot during the frequent plugging and unplugging of the connector 2015. Specifically, the reinforcing ribs of the slot include transverse reinforcing ribs located on the upper and lower walls of the slot, longitudinal reinforcing ribs located on the side walls of the slot, and oblique reinforcing ribs connecting the reinforcing ribs. The transverse reinforcing ribs are arranged along the width direction of the slot, and each transverse reinforcing rib is trapezoidal and forms an integral body with the inner wall of the slot. These transverse reinforcing ribs connect the upper and lower inner walls of the slot, effectively preventing the slot from deforming when subjected to force in the vertical direction. The longitudinal reinforcing ribs are arranged along the length direction of the slot, distributed on the left and right inner walls of the slot, and 3 are arranged on each side. These longitudinal reinforcing ribs connect the front entrance of the slot with the rear bottom to form a longitudinal support skeleton to prevent the slot from bending longitudinally during the insertion of the connector 2015. The four inner corners of the slot are provided with oblique reinforcing ribs, which connect the adjacent transverse and longitudinal reinforcing ribs at a 45-degree angle to form a triangular support structure to effectively resist torsional force. The entrance area of ​​the slot, i.e., the position where the connector 2015 is initially inserted, has a density of reinforcing ribs greater than that of other positions to withstand a greater insertion impact force. The entrance of the slot is arranged in a trumpet shape to facilitate the insertion of the connector 2015. In an embodiment of the present application, a positioning protrusion is arranged at the bottom of the slot to ensure that the connector 2015 can be accurately inserted and accurately docked with the conductive pad 2014 of the light bar 2013. Specifically, a main positioning protrusion located in the center and two auxiliary positioning protrusions located on both sides are arranged at the bottom of the slot. The main positioning protrusion is located on the center line of the bottom of the slot, and cooperates with the semicircular groove in the center of the bottom of the connector 2015 to limit the front and rear position of the connector 2015. The auxiliary positioning protrusions are located on the left and right sides of the main positioning protrusion, respectively, and are trapezoidal in structure, cooperating with the corresponding trapezoidal grooves at the bottom of the connector 2015 to prevent the connector 2015 from lateral displacement or rotation after insertion. The top edges of the main positioning protrusion and the auxiliary positioning protrusion are designed as 30-degree guide bevels. When the connector 2015 is initially inserted, even if there is a slight offset, it can automatically adjust to the correct position under the guidance of the guide bevel. The arrangement of the three positioning protrusions adopts an asymmetric layout, that is, the distance between the main positioning protrusion and the auxiliary positioning protrusion on the left is smaller than the distance between the main positioning protrusion and the auxiliary positioning protrusion on the right. This unequal distance design ensures that the connector 2015 can only be inserted into the slot in the correct direction, realizing an effective anti-fool function. Around the positioning protrusion, two drainage grooves are set at the bottom of the slot in a V-shape to ensure that even if moisture or dust enters the slot, it can be discharged through these grooves and will not accumulate around the positioning protrusion to affect the positioning accuracy and electrical connection reliability.

[0054] A plurality of elastic conductive sheets 2016 are provided on one side of the connector 2015 facing the light bar 2013, and the elastic conductive sheets 2016 are in contact with the conductive pad 2014. The elastic conductive sheets 2016 are made of phosphor copper or beryllium copper material, and are gold plated on the surface. The elastic conductive sheets 2016 are arranged in an arch shape, and the shape of the elastic conductive sheets 2016 can also be arranged in a V shape, a U shape, or an S shape. The fixed end of the elastic conductive sheet 2016 can be fixed to the main body of the connector 2015 by welding, riveting, or embedded fixing.

[0055] The arrangement position of the elastic conductive sheet 2016 on the connector 2015 corresponds to the arrangement position of the conductive pad 2014 on the light bar 2013. At least a portion of the connector 2015 is disposed on the inner surface of the back plate 2011, and the power line 2017 is electrically connected to a portion of the connector 2015 exposed from the slot. The power line 2017 is electrically connected to the elastic conductive sheet 2016 through a metal wire inside the connector 2015.

[0056] A notch 20151 is provided on the surface of the connector 2015 facing the light bar 2013 near the edge of the back plate 2011, and the notch 20151 extends along the length direction of the connector 2015. When a portion of the connector 2015 is inserted into the slot, the protrusion 20111 is embedded in the space surrounded by the notch 20151 and the back of the light bar 2013, and the portion of the connector 2015 inserted into the slot is arranged between the protrusion 20111 and the side plate 2012 of the backlight module 201. The protrusion 20111 and the notch 20151 form a mechanical positioning structure. The edge of the notch 20151 is arranged as an inclined surface to facilitate the insertion of the protrusion 20111.

[0057] In a direction perpendicular to the plane of the back panel 2011 and pointing from the inner surface of the back panel 2011 to the outer surface of the back panel 2011 , the connector 2015 does not protrude from the outer surface of the back panel 2011 , thereby avoiding an increase in the thickness of the backlight module 201 .

[0058] The embodiments of the present application provide three different methods for fixing the connector 2015, namely: magnetic adsorption fixing, screw locking fixing and clamping fixing.

[0059] In a first embodiment, if Fig. 9 and Fig.10As shown, a conductive pad 2014 is partially provided on the light bar 2013, a slot is reserved at the corresponding position of the backlight module 201, and the connector 2015 is placed in the slot, with a matching gap between the connector 2015 and the slot in the horizontal direction. The matching gap can ensure the smooth insertion of the connector 2015 and limit its movement in the horizontal direction. The connector 2015 is arranged between the back of the light bar 2013 and the side plate 2012 of the backlight module 201, and a plurality of elastic conductive sheets 2016 are arranged on the surface of the connector 2015 facing the light bar 2013, and the elastic conductive sheets 2016 are in contact or interference contact with the conductive pad 2014 to achieve circuit conduction.

[0060] The surface of the connector 2015 facing away from the light bar 2013 is provided with a magnetic adsorption part 20152. The magnetic adsorption part 20152 is composed of a neodymium iron boron permanent magnet. At least a part of the magnetic adsorption part 20152 is embedded in the connector 2015, and the exposed surface of the remaining part of the magnetic adsorption part 20152 (if any) is flush with or slightly concave with the surface of the connector 2015. In the direction from the side of the connector 2015 facing away from the light bar 2013 to the side of the connector 2015 facing the light bar 2013, at least one magnetic adsorption part 20152 is provided at least one end of the connector 2015 in the length direction. In particular, the magnetic adsorption part 20152 is provided at both ends of the connector 2015 to provide a balanced adsorption force, so as to prevent the connector 2015 from tilting during use, resulting in poor contact between the elastic conductive sheet 2016 and the conductive pad 2014. The shape of the magnetic adsorption part 20152 is set to be circular or square.

[0061] In a second embodiment, if Fig. 9 and Fig.11As shown, a conductive pad 2014 is partially provided on the light bar 2013, and a slot is reserved at the corresponding position of the backlight module 201. The connector 2015 is placed in the slot, and there is a matching gap with the slot in the horizontal direction. The elastic conductive sheet 2016 of the connector 2015 is in contact or interference contact with the conductive pad 2014 to achieve circuit conduction. The surface of the connector 2015 facing away from the light bar 2013 is provided with a locking portion 20153, and the locking portion 20153 is an embedded threaded copper column, which is fixed to the connector 2015 by ultrasonic welding or embedded molding. Screw holes are preset at corresponding positions on the back panel 2011 or the side panel 2012, and the hole diameter matches the screw specification. The connector 2015 is locked to the backlight module 201 by screws to ensure a stable connection. In the direction from the side of the connector 2015 facing away from the light bar 2013 to the side of the connector 2015 facing the light bar 2013, at least one locking portion 20153 is arranged at at least one end of the length direction of the connector 2015. In particular, the positions of the locking portion 20153 are arranged at both ends of the connector 2015 to provide a balanced fixing force, so as to prevent the connector 2015 from tilting during use and causing poor contact between the elastic conductive sheet 2016 and the conductive pad 2014. In the embodiment of the present application adopting the screw locking and fixing method, a special reinforcement structure is arranged around the locking portion 20153 of the connector 2015 to ensure that the structure of the connector 2015 is stable during long-term use and frequent maintenance. Specifically, the locking portion 20153 is a threaded copper column, and a circle of annular reinforcement ribs are arranged on its periphery, and the height is flush with the locking portion 20153, forming a closed circular ring. Such annular reinforcement ribs can evenly distribute the locking force from the screws, and prevent the locking force from being concentrated at the root of the threaded copper column to cause cracking. From the annular reinforcement rib outward, multiple radial reinforcement ribs are arranged on the plastic shell of the connector 2015, with the same height as the annular reinforcement ribs. These radial reinforcement ribs disperse and transmit the locking force to the shell body of the connector 2015, forming a star-shaped support structure, so that the locking part 20153 and the connector 2015 shell form an integral force-bearing unit.

[0062] In a third embodiment, if Fig.12 and Fig.13 , Fig.14As shown, a conductive pad 2014 is partially provided on the light bar 2013, and a slot is reserved at the corresponding position of the backlight module 201. The connector 2015 is inserted into the slot, and there is a matching gap with the slot in the horizontal direction. The elastic conductive sheet 2016 of the connector 2015 contacts or interferes with the conductive pad 2014 to achieve circuit conduction. The surface of the connector 2015 facing away from the light bar 2013 is provided with a clamping portion 20154, and the clamping portion 20154 is a wing arranged at both ends of the length direction of the connector 2015. The clamping portion 20154 is integrally injection molded with the main body of the connector 2015. The end of the clamping portion 20154 is designed with a chamfer to facilitate insertion. The clamping portion 20154 is provided with an elastic hook, which cooperates with the clamping slot on the back plate 2011 or the side plate 2012 of the backlight module 201 to form a buckle connection. In the direction from the side of the connector 2015 facing away from the light bar 2013 to the side of the connector 2015 facing the light bar 2013, at least one clamping portion 20154 is disposed at at least one end of the connector 2015 in the length direction. In particular, the clamping portions 20154 are disposed at both ends of the connector 2015 to provide a balanced fixing force, thereby preventing the connector 2015 from tilting during use, thereby causing poor contact between the elastic conductive sheet 2016 and the conductive pad 2014.

[0063] The above three implementations all achieve the technical effect of not increasing the thickness of the bottom side of the display device. By using the conductive pad 2014 and the elastic conductive sheet 2016 to directly contact each other to achieve circuit connection, the connector 2015 does not protrude from the outer surface of the back plate 2011, thereby avoiding the influence of the connector 2015 on the thickness of the display device.

[0064] In an embodiment of the present application, the connection end between the connector 2015 and the power cord 2017 is configured as a fool-proof structure, using a trapezoidal or D-shaped socket to prevent the power cord 2017 from being plugged in reverse.

[0065] As an improvement, the connector 2015 is configured as a multi-section structure, the middle portion is used to accommodate the elastic conductive sheet 2016, and the two end portions are used for fixing. The middle portion of the connector 2015 has a smaller thickness to reduce the gap between the connector 2015 and the light bar 2013, while the two end portions have a larger thickness to improve the structural strength.

[0066] The connector 2015 and the slot are arranged to be in an oblique insertion structure, the insertion end of the connector 2015 is designed to be an inclined surface, and the inner wall of the slot is also arranged to be an inclined surface accordingly. The inclined surface angle of the oblique insertion structure is set between 15 degrees and 45 degrees, which can ensure smooth insertion and provide sufficient positioning effect. The contact surface of the oblique insertion structure is provided with a buffer material to reduce the impact and wear during the insertion process.

[0067] In order to increase the sealing performance of the connector 2015, a sealing lip or a sealing strip is provided between the contact surface between the connector 2015 and the slot to prevent moisture or dust from entering the interior of the backlight module 201, thereby improving the reliability of the backlight module 201 in harsh environments.

[0068] The elastic conductive sheet 2016 is fixed to the connector 2015 through a slot. The slot is set in a dovetail shape, and the fixed end of the elastic conductive sheet 2016 is set in a T shape or an L shape to cooperate with the slot to prevent it from falling off during use. The contact surface of the elastic conductive sheet 2016 and the slot is provided with a positioning protrusion or a groove to ensure that the elastic conductive sheet 2016 is installed in the correct position.

[0069] Through the above technical solution, the embodiment of the present application eliminates the connector 215 in the light bar 2013 , avoiding the extra increase in the thickness of the ground side of the display device, making the entire display device thinner, and reducing the material cost of the light bar 2013 .

[0070] The backlight module 201 and the display device provided in the present application realize circuit connection by setting a plurality of conductive pads 2014 on the side of the light bar 2013 facing away from the lamp beads, and using a connector 2015 with an elastic conductive sheet 2016 to contact the conductive pads 2014, thereby replacing the structure in which a female plug is set on the light bar 2013 in the traditional backlight module 201 and a power cord 2017 is connected to the light bar 2013 through a male plug, thereby effectively solving the technical problem of increased thickness of the ground side of the display device caused by the traditional structure, and having a significant technical effect.

[0071] First, the technical solution provided by the present application eliminates the plug female structure on the traditional light bar 2013 and replaces it with a flat conductive pad 2014 on the back of the light bar 2013, making the structure of the light bar 2013 itself more concise and flat. The conductive pad 2014 can be directly set or attached to the substrate of the light bar 2013, which hardly increases the thickness of the light bar 2013. Compared with the traditional three-dimensional protruding plug female structure, it greatly reduces the space occupied. This design makes the structure of the light bar 2013 itself become lighter and thinner.

[0072] Secondly, the present application uses the elastic conductive sheet 2016 on the connector 2015 to directly contact the conductive pad 2014 on the light bar 2013 to achieve electrical connection, rather than the traditional plug connection method. The design of the elastic conductive sheet 2016 enables it to maintain a small footprint while ensuring the reliability of the electrical connection. The elastic conductive sheet 2016 can be designed in a bow shape or other elastic structure to form a reliable pressure contact between the connector 2015 and the light bar 2013, ensuring a stable electrical connection without the need for a large connection structure.

[0073] More importantly, at least a portion of the connector 2015 in the present application is arranged on the inner surface of the back plate 2011, and in a direction perpendicular to the plane where the back plate 2011 is located and pointing from the inner surface of the back plate 2011 to the outer surface, the connector 2015 does not protrude from the outer surface of the back plate 2011. This technical solution cleverly utilizes the space inside the back plate 2011, hides the connector 2015 in the structural space formed by the back plate 2011 and the side plate 2012, and avoids the problem that the traditional connector 2015 needs to protrude extra on the side of the display device. The connector 2015 can be fixed by inserting into the slot at the connection between the back plate 2011 and the side plate 2012, using the magnetic adsorption part 20152 to adsorb the side plate 2012, locking it on the side plate 2012 through the locking part 20153, or locking it with the side plate 2012 through the clamping part 20154, etc., to ensure that the connection is stable without increasing the external size of the display device.

[0074] In addition, the protrusion 20111 on the edge of the back plate 2011 cooperates with the notch 20151 on the connector 2015, so that the connector 2015 can accurately dock with the conductive pad 2014 on the light bar 2013, and at the same time further optimize the space utilization, and firmly confine the connector 2015 in the internal space of the back plate 2011. This technical solution not only solves the electrical connection problem, but also cleverly handles the mechanical fixation problem, realizing an integrated solution.

[0075] In summary, the backlight module 201 and the display device provided by the present application avoid the increase in the thickness of the ground side of the display device, thereby realizing the thinness and lightness of the display device; at the same time, since the female plug structure on the light bar 2013 is eliminated, the material cost of the light bar 2013 is also reduced; in addition, the assembly process of the backlight module 201 is simplified, thereby improving production efficiency.

[0076] The embodiments of the present application are described in detail above, and the contents of this specification should not be construed as limiting the scope of protection of the present application.

Claims

1. A backlight module, characterized in that: The backlight module comprises: Back panel; A side panel connected to the back panel; A light bar, arranged on the inner surface of the back plate and at the edge of the back plate, the light bar is provided with a plurality of lamp beads, a side of the light bar facing away from the lamp beads is provided with a plurality of conductive pads, the plurality of conductive pads are electrically connected to the plurality of lamp beads, and the plurality of conductive pads are arranged along the length direction of the light bar; A connector, wherein a plurality of elastic conductive sheets are disposed on a side of the connector facing the light bar, the elastic conductive sheets are in contact with the conductive pads, and at least a portion of the connector is disposed on an inner surface of the back plate; and A power line is electrically connected to the connector.

2. The backlight module according to claim 1, characterized in that: A slot is provided at the connection between the back plate and the side plate, and a part of the connector is inserted into the slot.

3. The backlight module according to claim 1, characterized in that: The connector is provided with at least one magnetic adsorption portion, and the magnetic adsorption portion is adsorbed to the side plate.

4. The backlight module according to claim 3, characterized in that: At least one of the magnetic adsorption portions is disposed at at least one end of the connector in the length direction.

5. The backlight module according to claim 1, characterized in that: The connector is provided with at least one locking portion, and the locking portion is locked on the side plate.

6. The backlight module according to claim 5, characterized in that: At least one of the locking portions is disposed at at least one end of the connector in the length direction.

7. The backlight module according to claim 1, characterized in that: The connector is provided with at least one clamping portion, and the clamping portion is clamped with the side plate.

8. The backlight module according to claim 7, characterized in that: At least one of the clamping portions is disposed at at least one end of the connector in the length direction.

9. The backlight module according to claim 1, characterized in that: The edge of the back plate is provided with a raised portion raised in a direction perpendicular to the plane where the back plate is located; A notch is provided on a side of the connector facing the light bar; The protrusion is embedded in a space enclosed by the notch and a surface of the light bar facing away from the lamp beads.

10. The backlight module according to claim 9, characterized in that: A portion of the connector inserted into the slot is disposed between the protruding portion and the side plate.

11. The backlight module according to claim 1, characterized in that: In a direction perpendicular to the plane where the backplane is located and pointing from the inner surface of the backplane to the outer surface of the backplane, the connector does not protrude from the outer surface of the backplane.

12. A display device, characterized in that: The display device comprises a display panel and a backlight module as claimed in any one of claims 1 to 11, wherein the display panel and the backlight module are overlapped.

Images