Backlight module and display module

Abstract

The present application provides a backlight module and a display module, the backlight module includes an insulating substrate, a conductive substrate arranged on the insulating substrate, a diffusion plate and an optical film, a light mixing cavity is formed between the conductive substrate and the diffusion plate, a plurality of rows and columns of LED lamps are connected to the conductive substrate, a row of conductive connectors is arranged between two adjacent rows of LED lamps, a column of conductive connectors is arranged between two adjacent columns of LED lamps, and the conductive connectors are connected to the conductive substrate; each conductive connector is provided with a conductive pillar at intervals on a side away from the conductive substrate, and a lamp bead is provided on one end of the conductive pillar close to the diffusion plate; the conductive connector is configured so that when the light mixing cavity is deformed, the conductive connector contacts and connects to the conductive pillar, so that the lamp bead is lit. The present application solves the problem that the existing backlight module is prone to poor light shadow when deformation occurs.

Description

Technical Field

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

[0002] Existing backlight modules are mainly divided into direct-type and side-entry types. For direct-type backlight modules, the backlight source is a point light source arranged in an array. In order to obtain uniform brightness, the height A of the mixing cavity is closely related to the arrangement spacing P of the LED lamps. A / P is used as a basic design parameter to evaluate the state of picture quality. When the backlight module is deformed due to extrusion or heat, the components on the upper and lower sides of the mixing cavity expand, thereby occupying the space of the mixing cavity, reducing the height A of the mixing cavity, resulting in a smaller A / P value, which is prone to uneven brightness of light and dark at the corresponding position of the LED lamp, that is, poor light shadow (Hot Spot). Summary of the invention

[0003] The embodiments of the present application provide a backlight module and a display module. By arranging mutually spaced conductive pillars and conductive connectors between LED lamps, the conductive connectors are connected to a conductive substrate. When the mixing light cavity is deformed, the conductive connectors are deformed and expanded to contact and connect the conductive pillars, and the lamp beads are lit, thereby solving the problem that poor light shadows are easily generated in the existing backlight module when deformation occurs.

[0004] The present invention is implemented as follows: a backlight module includes an insulating substrate, a conductive substrate arranged on the insulating substrate, a diffusion plate and an optical film, a light mixing cavity is formed between the conductive substrate and the diffusion plate, a plurality of rows and columns of LED lamps are connected to the conductive substrate, a row of conductive connectors is arranged between two adjacent rows of LED lamps, a column of conductive connectors is arranged between two adjacent columns of LED lamps, and the conductive connectors are connected to the conductive substrate; a conductive pillar is provided at intervals on a side of each conductive connector away from the conductive substrate, and a lamp bead is provided on one end of the conductive pillar close to the diffusion plate; the conductive connector is configured so that when the light mixing cavity is deformed, the conductive connector contacts and connects to the conductive pillar, so that the lamp bead is lit.

[0005] In one embodiment, the conductive substrate is embedded in the insulating substrate, and a first via hole and a second via hole are provided on a side of the insulating substrate close to the light mixing cavity, the LED lamp is electrically connected to the conductive substrate through the first via hole, and the conductive connector is electrically connected to the conductive substrate through the second via hole;

[0006] The conductive connector is configured to contact and connect the conductive pillar through the second via hole when the light mixing cavity is deformed, so that the lamp bead is lit.

[0007] In one embodiment, the lamp beads are connected to the diffusion plate through transparent pillars, and the conductive pillars are arranged opposite to the conductive connectors with a gap.

[0008] In one embodiment, the conductive substrate is provided with insulating elastic columns around the conductive connector, and the insulating elastic columns are higher than the conductive connector;

[0009] The conductive support column is placed on the insulating support column, the diffusion plate is connected to a transparent support column, and the transparent support column is arranged opposite to the lamp bead at an interval.

[0010] In one of the embodiments, the orthographic projection of the lamp bead on the transparent pillar is located on a side surface of the transparent pillar away from the diffusion plate.

[0011] In one embodiment, four mutually adjacent LED lamps respectively located in two adjacent rows or two adjacent columns form a virtual rectangle, and a conductive connector is provided at the center of the virtual rectangle.

[0012] In one embodiment, a surface of the conductive connector facing away from the conductive substrate has a protrusion.

[0013] In one of the embodiments, a light reflecting film is provided on the outer surface of the conductive pillar.

[0014] In one embodiment, the conductive connector is made of shape memory material.

[0015] The beneficial effect of the backlight module provided by the present application is that: compared with the prior art, the present application sets a conductive connector between two adjacent rows and two adjacent columns of LED lamps, the conductive connector is connected to a conductive substrate, a conductive pillar is arranged at intervals on the side of the conductive connector away from the conductive substrate, and a lamp bead is arranged at one end of the conductive pillar close to the diffusion plate, when the mixed light cavity is deformed, the conductive connector will deform and expand to contact and connect the conductive pillar, so that the conductive pillar, the conductive connector and the conductive substrate will be connected, the lamp bead will be lit, and the light at the deformed position can be compensated, and the poor light shadow phenomenon at the deformed position can be improved. When the mixed light cavity is normal and not deformed, the conductive connector does not deform and expand, and there is a gap between the conductive connector and the conductive pillar, the lamp bead is in an extinguished state, and the backlight module displays normally. In summary, the backlight module of the present application can display normally at any time, and can avoid the poor light shadow caused by environmental factors to the greatest extent.

[0016] An embodiment of the present application further provides a display module, comprising the backlight module and the display panel as described in any of the above embodiments, wherein the display panel is arranged on a side of the optical film away from the light mixing cavity.

[0017] The beneficial effect of the display module provided by the present application is that: the above-mentioned backlight module is adopted, and the present application sets a conductive connector between two adjacent rows and two adjacent columns of LED lamps, the conductive connector is connected to the conductive substrate, and a conductive pillar is arranged at intervals on the side of the conductive connector away from the conductive substrate, and a lamp bead is arranged at one end of the conductive pillar close to the diffuser. When the mixed light cavity is deformed, the conductive connector will deform and expand to contact and connect the conductive pillar, so that the conductive pillar, the conductive connector and the conductive substrate will be connected, and the lamp bead will be lit, which can compensate for the light at the deformed position and improve the poor light shadow phenomenon at the deformed position. When the mixed light cavity is normal and not deformed, the conductive connector does not deform and expand, and there is a gap between the conductive connector and the conductive pillar. The lamp bead is in an extinguished state, and the backlight module displays normally. In summary, the backlight module of the present application can display normally at any time, and can avoid the poor light shadow caused by environmental factors to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the structure of the backlight module provided in the first embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the arrangement of LED lamps and lamp beads of the backlight module provided in the first embodiment of the present application;

[0020] Figure 3 The structure of the mixing cavity of the backlight module provided in the first embodiment of the present application when deformed is simplified. Figure 1 ;

[0021] Figure 4 The structure of the mixing cavity of the backlight module provided in the first embodiment of the present application when deformed is simplified. Figure 2 ;

[0022] Figure 5 is a schematic diagram of the conductive connector of the backlight module provided in the first embodiment of the present application before and after the change;

[0023] Figure 6 is a schematic structural diagram of a backlight module provided in Embodiment 2 of the present application;

[0024] Figure 7 is a schematic diagram of the conductive connector of the backlight module provided in the second embodiment of the present application before and after the change;

[0025] Figure 8 It is a structural schematic diagram of the display module provided in Example 3 of the present application.

[0026] Reference numerals: 1, insulating substrate; 10, light mixing cavity; 2, conductive substrate; 3, diffusion plate; 4, optical film; 5, LED lamp; 6, conductive connector;

[0027] 7. Conductive pillar; 70. Lamp beads; 8. Transparent pillar; 9. Insulating elastic pillar;

[0028] 100. Backlight module; 200. Display panel. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] It should also be noted that, in the embodiments of the present application, the same figure mark is used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0034] The embodiments of the present application provide a backlight module and a display module, which solve the problem that the existing backlight module is prone to poor light shadow when deformation occurs.

[0035] Embodiment 1

[0036] refer to Figure 1The backlight module 100 provided in the first embodiment of the present application includes an insulating substrate 1, a conductive substrate 2 arranged on the insulating substrate 1, a diffuser 3 and an optical film 4, a light mixing cavity 10 is formed between the conductive substrate 2 and the diffuser 3, a plurality of rows and columns of LED lamps 5 are connected to the conductive substrate 2, a row of conductive connectors 6 is arranged between two adjacent rows of LED lamps 5, a column of conductive connectors 6 is arranged between two adjacent columns of LED lamps 5, and the conductive connectors 6 are connected to the conductive substrate 2; a conductive pillar 7 is arranged at intervals on a side of each conductive connector 6 away from the conductive substrate 2, and a lamp bead 70 is arranged on one end of the conductive pillar 7 close to the diffuser 3; the conductive connector 6 is configured so that when the light mixing cavity 10 is deformed, the conductive connector 6 contacts and connects to the conductive pillar 7, so that the lamp bead 70 is lit.

[0037] The conductive connector 6 is made of a shape memory material. The shape memory material has a shape memory function and can change and control its shape according to external stimuli, so that the conductive connector 6 can expand in volume when subjected to external pressure and can return to its original shape after the pressure is removed. Specifically, common shape memory materials, i.e., extrusion expansion materials, include but are not limited to shape memory polymers SMP, nickel-titanium alloys, and thermal expansion materials (such as metals, ceramics, etc.).

[0038] It should be noted that when the backlight module 100 is designed, the height of the light mixing cavity 10 is set to A, and the distance between two adjacent LED lamps 5 is set to P. When A / P is greater than or equal to 0.5, the backlight module 100 can be guaranteed to display normally without uneven brightness. However, after working for a long time, the LED lamps 5 are likely to increase the temperature of the backlight module 100 and deform, causing the light mixing cavity 10 to deform, that is, the height of the light mixing cavity 10 at the deformed position becomes smaller, which will reduce the value of A / P and easily cause uneven brightness.

[0039] In the embodiment of the present application, since the conductive pillars 7 and conductive connectors 6 are arranged at intervals from each other, when the light mixing cavity 10 is deformed, the conductive connectors 6 at the deformed position will expand and increase in volume, thereby contacting the conductive pillars 7, so that the conductive pillars 7 are connected to the conductive substrate 2, and the lamp beads 70 are lit, so that the light emitted by the lamp beads 70 can compensate for the light at the deformed position of the light mixing cavity 10, so that the uneven brightness of the backlight module 100 is eliminated, effectively improving the poor light shadow, and ensuring that the backlight module 100 can display normally at any time. The backlight module 100 of the present application can improve the poor light shadow caused by environmental factors by adding conductive connectors 6, conductive pillars 7 and lamp beads 70 without changing the existing backlight module 100, and has reversibility and real-time performance, and can avoid the poor light shadow of the backlight module 100 caused by environmental factors (such as heat, extrusion, etc.) to the greatest extent.

[0040] Among them, the lamp bead 70 arranged on the conductive support 7 is conductively connected to the conductive support 7. Since the lamp bead 70 is indirectly connected to the conductive substrate 2 through the conductive support 7 and the conductive connector 6, that is, the lamp bead 70 and the LED lamp 5 are driven by the same current, the selection of the lamp bead 70 is not unique. The lamp bead 70 with different driving currents can be selected according to the actual situation and the driving current of the LED lamp 5. For example, if the driving current of the LED lamp 5 is 3A, that is, the output current of the conductive substrate 2 is 3A, then the lamp bead 70 with a driving current less than or equal to 3A can be selected, such as 0. 5A lamp bead 70, so that when the deformation degree of the mixing light cavity 10 is small, the human eye cannot observe the poor lamp shadow phenomenon. At this time, the expansion of the conductive connector 6 is not obvious, and the conductive connector 6 has not yet contacted the conductive support 7. At this time, the lamp bead 70 is not lit; when the deformation degree of the mixing light cavity 10 increases, the human eye can observe the poor lamp shadow phenomenon. At this time, the expansion degree of the conductive connector 6 also increases, and the volume of the conductive connector 6 increases, so that the conductive connector 6 is in contact with the conductive support 7. At this time, the current output by the conductive substrate 2 passes through the conductive support 7, and the lamp bead 70 is lit, improving the poor lamp shadow phenomenon.

[0041] In some embodiments, the conductive pillar 7 is made of conductive carbon material, wherein the conductive carbon material includes but is not limited to carbon nanotubes, carbon fibers and graphene oxide.

[0042] In some embodiments, the shape of the conductive pillar 7 can be cylindrical, square columnar, or truncated cone. The embodiment of the present application does not make any specific limitations. As long as the conductive pillar 7 is columnar and can contact and connect to the conductive connector 6 to make the lamp bead 70 emit light, it can be used.

[0043] In some embodiments, reference Figure 1 The conductive substrate 2 is embedded in the insulating substrate 1. A first via hole and a second via hole are provided on a side of the insulating substrate 1 close to the light mixing cavity 10. The LED lamp 5 is electrically connected to the conductive substrate 2 through the first via hole, and the conductive connector 6 is electrically connected to the conductive substrate 2 through the second via hole. The conductive connector 6 is configured so that when the light mixing cavity 10 is deformed, the conductive connector 6 contacts and connects to the conductive pillar 7 through the second via hole, so that the lamp bead 70 is lit.

[0044] It should be noted that the conductive substrate 2 is embedded in the insulating substrate 1, so that the insulating substrate 1 can protect the conductive substrate 2, so that the circuit on the conductive substrate 2 is not easily damaged, and the normal light emission of the LED lamp 5 is not affected. In addition, a via hole is provided on the insulating substrate 1, and the LED lamp 5 can be directly provided in the first via hole when the backlight module 100 is assembled, which greatly simplifies the operation of the staff. At the same time, the first via hole can also play a certain role in stabilizing the LED lamp 5, ensuring that the LED lamp 5 will not fall off easily after being connected to the conductive substrate 2, especially when the light mixing cavity 10 is deformed, the LED lamp 5 will not fall off easily from the conductive substrate 2. Similarly, the second via hole is provided on the insulating substrate 1, so that the conductive connector 6 can extend toward the conductive pillar 7 along the axial direction of the second via hole when expanding, so as to accurately contact and connect with the conductive pillar 7, or the conductive pillar 7 can move toward the conductive connector 6 along the axial direction of the second via hole, so as to accurately contact and connect with the conductive connector 6, so as to ensure that the conductive connector 6 can be connected to the conductive pillar 7 when the light mixing cavity 10 is deformed, so that the lamp bead 70 is lit to improve the poor light shadow.

[0045] In some embodiments, reference Figure 1 , the lamp bead 70 is connected to the diffuser plate 3 through the transparent support 8, and the conductive support 7 and the conductive connector 6 are arranged opposite to each other. This is equivalent to indirectly connecting the conductive support 7 to the diffuser plate 3, and the conductive connector 6 is connected to the conductive substrate 2, so as to ensure that there is a certain interval between the conductive support 7 and the conductive connector 6 when the light mixing cavity 10 is not deformed, and the lamp bead 70 is turned off, which will not affect the normal display of the backlight module 100.

[0046] The transparent pillar 8 is made of a light-transmitting material, so that it will not affect the light emission of the LED lamp 5 and the light emitted by the lamp bead 70 irradiating the light mixing cavity 10 to form light compensation at the deformation position of the light mixing cavity 10, thereby improving the poor light and shadow. The transparent pillar 8 can be connected to the lamp bead 70, and specifically, a groove can be set at one end of the transparent pillar 8, the groove cover is set on the lamp bead 70, and the lamp bead 70 is bonded in the groove by transparent adhesive; of course, the transparent pillar 8 can also be connected to the conductive pillar 7, and specifically, the surface of the conductive pillar 7 on which the lamp bead 70 is set can be set to have an area larger than the area of ​​the lamp bead 70, that is, the lamp bead 70 will not protrude from the surface after being set on the surface of one side of the conductive pillar 7, and then a groove is set at one end of the transparent pillar 8, and the groove cover is set on the lamp bead 70. At this time, the surface of the transparent pillar 8 on which the groove is set will contact the surface of the conductive pillar 7 on which the lamp bead 70 is set, and the two are bonded together by adhesive, so that the conductive pillar 7 is connected to the diffuser 3 through the transparent pillar 8, and the light emission of the lamp bead 70 will not be affected.

[0047] In some embodiments, the orthographic projection of the lamp bead 70 on the transparent pillar 8 is located on the side surface of the transparent pillar 8 away from the diffuser plate 3. In this way, whether the transparent pillar 8 is connected to the lamp bead 70 or the transparent pillar 8 is connected to the conductive pillar 7, the conductive pillar 7 can be stably connected to the diffuser plate 3 through the transparent pillar 8, ensuring that there is a gap between the conductive pillar 7 and the conductive connector 6 when the light mixing cavity 10 is not deformed, and the lamp bead 70 will not light up.

[0048] It should be noted that, through the above-mentioned structural setting, if the transparent pillar 8 is connected to the lamp bead 70, the groove at one end of the transparent pillar 8 will completely cover the lamp bead 70, so that the connection area between the lamp bead 70 and the transparent pillar 8 becomes larger and the connection is more secure. If the transparent pillar 8 is connected to the conductive pillar 7, the surface of one end of the transparent pillar 8 where the groove is set will contact the surface of one side of the conductive pillar 7 where the lamp bead 70 is set, so that when connecting, directly buckling the groove of the transparent pillar 8 on the lamp bead 70 can ensure that the transparent pillar 8 and the conductive pillar 7 are coaxially arranged, ensuring that when the transparent pillar 8 moves toward the conductive connector 6, it will drive the conductive pillar 7 to move toward the conductive connector 6 in the vertical direction, ensuring that when the light mixing cavity 10 is deformed, the conductive pillar 7 will contact and connect with the conductive connector 6 to light up the lamp bead 70.

[0049] The transparent pillar 8 and the conductive pillar 7 can both be cylindrical or square-columnar. The cross-sectional shape and size of the transparent pillar 8 and the conductive pillar 7 can be set to be the same, so that the conductive pillar 7 and the transparent pillar 8 can be made using the same mold, saving costs.

[0050] In the embodiment of the present application, the light mixing cavity 10 can be deformed in various ways. Specifically, the conductive substrate 2 can be heated or squeezed to deform the light mixing cavity 10, or the diffuser plate 3 and the optical film 4 can be squeezed to deform the light mixing cavity 10.

[0051] In the first embodiment of the present application, reference is made to Figure 3 and Figure 5 When the conductive substrate 2 is heated or squeezed to deform the light mixing cavity 10, the principle of the lamp bead 70 to improve the poor light shadow is: there is a certain interval between the conductive pillar 7 and the conductive connector 6, so when the conductive substrate 2 is squeezed, the position of the conductive pillar 7 does not change, and the conductive connector 6 is squeezed and expands to fill the second via hole, so that the conductive connector 6 will contact and connect with the conductive pillar 7, so that the conductive substrate 2, the conductive connector 6 and the conductive pillar 7 are connected, and the lamp bead 70 is lit to compensate for the light at the deformed position, so that the poor light shadow at the deformed position is eliminated. It should be noted that since the position of the conductive pillar 7 does not change, the side surface of the conductive pillar 7 close to the conductive connector 6 can be greater than or equal to the opening of the second via hole, so that the conductive pillar 7 is fully in contact with the conductive connector 6, improving the conductivity, which is conducive to the lighting of the lamp bead 70.

[0052] refer to Figure 4 When the diffuser plate 3 and the optical film 4 are squeezed to deform the light mixing cavity 10, the principle of the lamp bead 70 to improve the poor lamp shadow is: there is a certain interval between the conductive support 7 and the conductive connector 6, so when the diffuser plate 3 and the optical film 4 are squeezed, the transparent support 8 and the conductive support 7 will move toward the conductive connector 6, and the conductive connector 6 will not be deformed if it is not squeezed. When squeezed to a certain extent, the conductive support 7 will be inserted into the second via hole to contact and connect with the conductive connector 6, so that the conductive substrate 2, the conductive connector 6 and the conductive support 7 are connected, and the lamp bead 70 is lit to compensate for the light at the deformed position, so that the poor lamp shadow at the deformed position is eliminated. It should be noted that since the conductive connector 6 will not be deformed without being squeezed, it can only rely on the conductive pillar 7 to be inserted into the second via hole to contact and connect with the conductive connector 6. Therefore, the side surface of the conductive pillar 7 close to the conductive connector 6 can be set to be smaller than or equal to the opening of the second via hole, so that the conductive pillar 7 can be inserted into the second via hole to contact and connect with the conductive connector 6, and after the conductive pillar 7 is inserted into the second via hole to squeeze the conductive connector 6, the conductive connector 6 will also expand, so that the conductive connector 6 can be fully contacted with the conductive pillar 7, thereby improving the conductive performance and facilitating the lighting of the lamp bead 70.

[0053] In some embodiments, the LED lamps 5 are arranged in an array, and a row of conductive connectors 6 is set between two adjacent rows of LED lamps 5, and a column of conductive connectors 6 is set between two adjacent columns of LED lamps 5. Each conductive connector 6 is correspondingly set with a conductive pillar 7 spaced therefrom, and a lamp bead 70 is set on the conductive pillar 7, so that no matter where the mixed light cavity 10 is deformed, the corresponding conductive connector 6 can be in contact with the corresponding conductive pillar 7 to make the lamp bead 70 light up for light compensation and improve the poor light shadow. Specifically, a conductive connector 6 can be set between any two adjacent LED lamps 5, or a row of conductive connectors 6 can be set between two adjacent rows of LED lamps 5 in a staggered manner. The conductive connector 6 set in this way is simultaneously located between two adjacent rows of LED lamps 5 and between two adjacent columns of LED lamps 5. Compared with the previous setting method, the number of conductive connectors 6 and conductive pillars 7 can be reduced, thereby reducing costs.

[0054] In some embodiments, reference Figure 2In addition to the above two ways of setting the conductive connector 6, the conductive connector 6 can also be set in the following way: four adjacent LED lamps 5 located in two adjacent rows or two adjacent columns form a virtual rectangle, and a conductive connector 6 is set at the center of the virtual rectangle. That is, the conductive connector 6 and the corresponding conductive pillar 7 are set at the intersection position of the light of the LED lamp 5, so that the conductive connector 6 can be distributed more evenly on the conductive substrate 2, and then the conductive pillar 7 can be distributed more evenly in the light mixing cavity 10, so that the light emitted by the lamp bead 70 after lighting is more evenly irradiated, and then the improvement effect of the uneven brightness can be improved.

[0055] In some embodiments, the conductive connector 6 has a protrusion on one side of the surface away from the conductive substrate 2. Since the conductive connector 6 is made of shape memory material, it will deform and expand once it is squeezed. Therefore, compared with setting the side of the conductive connector 6 away from the conductive substrate 2 as a flat surface or a concave surface, the above setting can make it easier for the conductive connector 6 to contact and connect with the conductive pillar 7 after expansion.

[0056] It should be noted that the protrusion on the surface of the side of the conductive connector 6 away from the conductive substrate 2 can be an arc-shaped protrusion, a convex point, or a triangular protrusion, which is not specifically limited in the embodiment of the present application. Specifically, the conductive connector 6 in the embodiment of the present application can be set to a sphere, an ellipsoid, or a square with a wavy concave-convex surface on one side, which is not specifically limited in the embodiment of the present application, as long as it meets the requirement that the surface of the side of the conductive connector 6 away from the conductive substrate 2 is not a plane or a concave surface.

[0057] In some embodiments, a light reflective film is provided on the outer surface of the conductive pillar 7. This ensures that the light emitted by the LED lamp 5 can irradiate the diffuser 3, will not be absorbed by the conductive pillar 7, will not cause loss to the light emitted by the LED lamp 5, and ensures that the light emitted by the backlight module 100 can meet the normal display function.

[0058] Embodiment 2

[0059] refer to Figure 6, the backlight module 100 provided in the second embodiment of the present application is different from that in the first embodiment, except that the arrangement of the conductive pillar 7 is different. In the second embodiment of the present application, the conductive substrate 2 is provided with an insulating elastic column 9 around the conductive connector 6, and the insulating elastic column 9 is higher than the conductive connector 6; the conductive pillar 7 is placed on the insulating support column, and the diffuser 3 is connected to a transparent pillar 8, and the transparent pillar 8 is arranged opposite to the lamp bead 70. In this way, the insulating elastic column 9 supports the conductive pillar 7, and the conductive connector 6 is connected to the conductive substrate 2, so that when the light mixing cavity 10 is not deformed, there is a certain interval between the conductive pillar 7 and the conductive connector 6, and the lamp bead 70 is extinguished, which will not affect the normal display of the backlight module 100.

[0060] It should be noted that, since the conductive connector 6 is connected to the conductive substrate 2 through the second via hole, the insulating elastic column 9 can also be connected to the conductive substrate 2 through the second via hole, and the insulating elastic column 9 is arranged around the conductive connector 6. In order to allow a gap between the conductive support 7 placed on the insulating elastic column 9 and the conductive connector 6, the insulating elastic column 9 can be set higher than the conductive connector 6. Specifically, the insulating elastic column 9 can be flush with the opening of the second via hole, or higher than the opening of the second via hole. It can be set according to the characteristics of the conductive connector 6 and the size of the second via hole, as long as it is ensured that the conductive connector 6 can be in contact and connected with the conductive support 7 to light up the lamp bead 70 when the light mixing cavity 10 is deformed and the lamp shadow is poor.

[0061] In the second embodiment of the present application, reference is made to Figure 6 and Figure 7 When the conductive substrate 2 is heated or squeezed to deform the light mixing cavity 10, the principle of the lamp bead 70 improving the poor light shadow is that when the conductive substrate 2 is squeezed, the conductive connector 6 is squeezed and expands to fill the second via hole, and the positions of the insulating elastic column 9 and the conductive pillar 7 move up, but the insulating elastic column 9 is connected to the conductive substrate 2, so the distance between the conductive pillar 7 and the second via hole does not increase, so the conductive connector 6 will contact and connect with the conductive pillar 7, so that the conductive substrate 2, the conductive connector 6 and the conductive pillar 7 are connected, and the lamp bead 70 is lit to compensate for the light at the deformed position, so that the poor light shadow at the deformed position is eliminated, and because the insulating elastic column 9 has a certain elasticity, the conductive connector 6 and the conductive pillar 7 can fully contact to improve the conductive performance, which is conducive to the lighting of the lamp bead 70. When the squeezing disappears, the light mixing cavity 10 returns to the shape before deformation, the volume of the conductive connector 6 will decrease, and the initial shape and size will be restored, and the insulating elastic column 9 will also restore the initial shape, so that the conductive pillar 7 and the conductive connector 6 maintain the initial distance.

[0062] When the diffusion plate 3 and the optical film 4 are squeezed to deform the light mixing cavity 10, the principle of the lamp bead 70 improving the poor lamp shadow is that when the diffusion plate 3 and the optical film 4 are squeezed, the transparent support 8 will move toward the lamp bead 70, while the conductive connector 6 is not squeezed and will not deform. Since there is a gap between the transparent support 8 and the lamp bead 70, and there is also a gap between the conductive support 7 and the conductive connector 6, if the squeezing degree is light, the human eye has not observed the uneven brightness, then at this time the transparent support 8 and the lamp bead 70 have not yet contacted, or the transparent support 8 and the lamp bead 70 have contacted but the conductive support 8 has not yet contacted. The column 7 has not yet come into contact with the conductive connector 6, the lamp bead 70 cannot be lit, and the backlight module 100 emits light normally, and there is no need to compensate for the light; if the degree of extrusion increases, the transparent pillar 8 will move downward and contact the lamp bead 70, thereby moving downward together with the conductive pillar 7, and the insulating elastic pillar 9 will be compressed after being subjected to pressure, so that the distance between the conductive pillar 7 and the conductive connector 6 becomes smaller until they are in contact, so that the conductive substrate 2, the conductive connector 6 and the conductive pillar 7 are connected, and the lamp bead 70 is lit to compensate for the light at the deformed position, so that the poor light shadow at the deformed position is eliminated. When the extrusion disappears, the mixed light cavity 10 returns to its shape before deformation, the transparent pillar 8 moves up, and the insulating elastic pillar 9 also returns to its initial shape, so that the conductive pillar 7 and the conductive connector 6 maintain the initial distance.

[0063] Embodiment 3

[0064] refer to Figure 8 Embodiment 3 of the present application provides a display module, including a backlight module 100 and a display panel 200 as in any of the above embodiments, and the display panel 200 is arranged on a side of the optical film 4 away from the light mixing cavity 10.

[0065] It should be noted that Figure 8 The backlight module 100 is the backlight module 100 of the first embodiment, which is only used as an example to illustrate the structure of the display module of the third embodiment of the present application, and does not limit the display module of the third embodiment of the present application to only include the backlight module 100 of the first embodiment.

[0066] The detailed structure of the backlight module 100 can be referred to the above-mentioned embodiment and will not be repeated here; it can be understood that since the above-mentioned backlight module 100 is used in the display module of the present application, the embodiment of the display module of the present application includes all the technical solutions of all the embodiments of the above-mentioned backlight module 100, and can achieve the technical effects achieved by the above-mentioned technical solutions.

[0067] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A backlight module, comprising an insulating substrate (1), a conductive substrate (2) embedded in the insulating substrate (1), a diffuser (3) and an optical film (4), wherein a light mixing cavity (10) is formed between the conductive substrate (2) and the diffuser (3), and LED lamps (5) arranged in multiple rows and columns are connected to the conductive substrate (2), characterized in that: A row of conductive connectors (6) is arranged between two adjacent rows of LED lamps (5), and a column of conductive connectors (6) is arranged between two adjacent columns of LED lamps (5), the conductive connectors (6) are connected to the conductive substrate (2), and the conductive connectors (6) are made of shape memory material; A conductive pillar (7) is provided at intervals on a side of each conductive connector (6) away from the conductive substrate (2), and a lamp bead (70) is provided on one end of the conductive pillar (7) close to the diffusion plate (3); The conductive connector (6) is configured such that when the light mixing cavity (10) is deformed, the conductive connector (6) contacts and connects with the conductive pillar (7), so that the lamp bead (70) is lit.

2. The backlight module according to claim 1, characterized in that: A first via hole and a second via hole are provided on a side of the insulating substrate (1) close to the light mixing cavity (10); the LED lamp (5) is electrically connected to the conductive substrate (2) through the first via hole; and the conductive connector (6) is electrically connected to the conductive substrate (2) through the second via hole; The conductive connector (6) is configured such that when the light mixing cavity (10) is deformed, the conductive connector (6) contacts and connects to the conductive pillar (7) through the second via hole, so that the lamp bead (70) is lit.

3. The backlight module according to claim 2, characterized in that: The lamp bead (70) is connected to the diffusion plate (3) via a transparent support (8), and the conductive support (7) and the conductive connector (6) are arranged opposite to each other and at a distance.

4. The backlight module according to claim 2, characterized in that: The conductive substrate (2) is provided with insulating elastic columns (9) around the conductive connector (6), and the insulating elastic columns (9) are higher than the conductive connector (6); The conductive pillar (7) is placed on the insulating elastic pillar (9), the diffusion plate (3) is connected to a transparent pillar (8), and the transparent pillar (8) and the lamp bead (70) are arranged opposite to each other and spaced apart.

5. The backlight module according to claim 4, characterized in that: The orthographic projection of the lamp bead (70) on the transparent pillar (8) is located on a side surface of the transparent pillar (8) away from the diffusion plate (3).

6. The backlight module according to any one of claims 1 to 5, characterized in that: Four mutually adjacent LED lamps (5) respectively located in two adjacent rows or two adjacent columns form a virtual rectangle, and a conductive connector (6) is provided at the center of the virtual rectangle.

7. The backlight module according to claim 6, characterized in that: The conductive connecting body (6) has a protrusion on a side surface away from the conductive substrate (2).

8. The backlight module according to claim 6, characterized in that: The outer surface of the conductive support (7) is provided with a light reflecting film.

9. The backlight module according to any one of claims 1-5, 7-8, characterized in that: The conductive connector (6) is made of a material including shape memory polymer (SMP), nickel-titanium alloy or ceramic.

10. A display module, characterized in that: include: The backlight module (100) according to any one of claims 1 to 9; The display panel (200) is arranged on a side of the optical film (4) away from the light mixing cavity (10).

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