WO2020042519A1

WO2020042519A1 - Dual-heat-conducting-strip splint type led display unit module

Info

Publication number: WO2020042519A1
Application number: PCT/CN2019/070245
Authority: WO
Inventors: 刘振亮
Original assignee: 刘振亮
Priority date: 2018-08-29
Filing date: 2019-01-03
Publication date: 2020-03-05
Also published as: CN108847145A; CN108847145B

Abstract

Disclosed is a dual-heat-conducting-strip splint type LED display unit module, relating to the technical field of LED display screen. The dual-heat-conducting-strip splint type LED display unit module comprises a sealant body (20), a heat conducting panel (30), a heat conducting back plate (40), a heat conducting column (50), and an LED display lamp board (10) composed of circuit boards (11), IC chips (12) and LED light emitting tubes (13). The circuit boards (11) are stacked and clamped between the heat conducting panel (30) and the heat conducting back plate (40); lamp body via holes (a) are formed at positions corresponding to the LED light emitting tubes (13) on the heat conducting panel (30); the heat conducting column (50) runs through the heat conducting back plate (40) and the circuit board (11) to be locked and fixed on the heat conducting panel (30); the sealant body (20) covers the heat conducting panel (30) and integrates at least the heat conducting panel (30) and the LED display lamp board (10) into a whole. The heat conducting panel (30) and the heat conducting back plate (40) are used to constitute double-layer heat conducting strips clamping the LED display lamp board (10), so as to rapidly conduct and dissipate heat generated by direct solar radiation and the LED display lamp board (10) in cooperation with the heat conducting column (50). Besides, the sealant body (20) can not only enhance the structural airtightness of the entire module, but also lock and fix the heat conducting panel (30), the LED display lamp board (10) and the heat conducting back plate (40), thereby guaranteeing the stability of the module structure.

Description

Double thermally conductive sheet plywood type LED display unit module

Technical field

The invention relates to the technical field of LED display screens, in particular to a dual thermally conductive sheet plywood LED display unit module.

Background technique

As we all know, the general process structure of the traditional LED display unit module is: after the LED display lamp board is installed in the plastic shell, a liquid sealant is poured into the plastic shell to encapsulate the LED display lamp board in the plastic shell, and the liquid is sealed. After the glue is cured, the mask is placed on the light-emitting side of the LED display lamp board and locked with the plastic shell to form a finished LED display unit module.

technical problem

When the traditional LED display unit module is used in an outdoor environment (especially in an environment exposed to sunlight), since the sealing gel and the plastic gel constituting the mask are poor thermal conductors, the heat generated by the sun will The sealing gel on the front surface of the display lamp board is gathered in the body; at the same time, the circuit board located on the back side of the LED light-emitting tube is made of fiber material, which is also a poor thermal conductor, and is lit by the LED light (ie, the LED light-emitting tube in the working state). The heat generated will also be collected in the sealant at the same time; based on this, the heat generated by sunlight exposure and the heat generated by LED lights will be superimposed on each other, and due to the lack of structural transmission and heat dissipation of the entire module, the continuous sunlight Under the exposure and continuous operation of the unit module, the internal temperature of the sealing gel will rise sharply, and the temperature will change sharply and continuously with the change of the ambient temperature and the brightness of the display lamp board. The high temperature will cause the unit module and even the outdoor LED display. Screens commonly exist such as excessive temperature of the lamp body and uncontrollable temperature rise, which in turn leads to an increase in the rate of dead lights, serious light decay, and display. Group deformation, fault frequent many other issues, this is the outdoor LED display industry for many years the presence of chronic illness.

Technical solutions

In view of the shortcomings of the prior art described above, an object of the present invention is to provide a dual thermally conductive sheet plywood LED display unit module.

In order to achieve the above objective, the present invention adopts the following technical solutions:

A dual-heat-conducting sheet-clamp type LED display unit module includes an LED display light board. The LED display light board includes a circuit board, an IC chip mounted on a rear surface of the circuit board, and a plurality of chips mounted on the circuit board. LED light-emitting tubes on the front surface of the front surface and in an array;

It also includes a sealing gel, a thermally conductive panel, a thermally conductive back plate, and a plurality of thermally conductive columns. The circuit board is stacked and clamped between the thermally conductive panel and the thermally conductive back plate. The thermally conductive panel is in phase with each LED light-emitting tube. Corresponding positions are provided with lamp body vias for LED light emitting tubes to pass through. The front end of the thermally conductive post sequentially penetrates the thermally conductive back plate and the circuit board and is locked to the thermally conductive panel. The sealing gel covers the thermally conductive panel. And at least cover the heat conducting panel and the LED display lamp board as a whole.

Preferably, a first raised rib position is provided on the heat conductive panel and at a position corresponding to each heat conductive column, and the raised surface of the first raised rib position is located on the front surface side of the circuit board. The front end of the heat conducting column is locked on the first raised rib.

Preferably, the thermally conductive post includes a nut portion abutting on a rear surface side of the thermally conductive back plate, and a guide post which is axially extended from a central area of the nut portion and is formed to penetrate the thermally conductive back plate and the circuit board at the same time. The front end of the guide post portion is extended axially after the front end of the guide post portion is formed and fixed to the first protruding rib position. The length of the guide post portion is not less than the thickness of the circuit board and the thickness of the heat conductive back plate. And, the front end surface of the guide post portion is in abutment with the convex surface of the first raised rib position, and the diameter of the wire portion is smaller than the diameter of the guide post portion.

Preferably, a convex point of a lamp point is provided on the heat conducting panel and located at the side of each of the through holes of the lamp body.

Preferably, the front surface of the sealing colloid is a hemp surface and / or the front surface of the sealing colloid is formed with an anti-reflective pattern for covering the lamp point ribs distributed in rows or rows as a whole.

Preferably, the circuit board is further provided with a plurality of thermally conductive copper posts distributed through the circuit board, and the rear end surface of the thermally conductive copper posts is in contact with the thermally conductive back plate.

Preferably, a second raised rib position for accommodating an IC chip is provided on the thermally conductive back plate, and a raised surface of the second raised rib position is located on a rear surface side of the thermally conductive back plate, and the second A plurality of external fixing nuts arranged in an array are arranged on the convex surface of the convex rib position.

Preferably, the rear surface of the thermally conductive back plate is provided with a first colloidal sealing line covering a peripheral surface of the external fixing nut and distributed along a circular path formed by a plurality of external fixing nuts connected end to end.

Preferably, on the rear surface of the thermally conductive back plate and within the enclosed area of the first colloidal sealing network, a plurality of internal fixing nuts distributed in an array with each other are further disposed on the rear surface of the thermally conductive back plate. Provided with a second colloidal seal line covering the peripheral surface of the pair of internally fixed nuts and distributed along a circular path formed by end-to-end connection of a plurality of paired internally fixed nuts;

It also includes a terminal box that is locked to the thermally conductive back plate by a pair of internal fixing nuts. The terminal box at least includes a thermally conductive bottom plate stacked on the thermally conductive back plate and a box body assembled integrally with the thermally conductive bottom plate. Heat dissipation fins are arranged on the front surface of the outside of the box.

Preferably, it further comprises a plurality of glue-injection tongues distributed through the sides of the heat-conducting panel and the sides of the circuit board at the same time, and the sealing glue includes a main body area covering the heat-conducting panel and formed on the main body area. The periphery of the part covers at least the peripheral wall part of the side of the heat conducting panel and the side of the circuit board at the same time, and a colloid tenon part filled in the injection tongue is formed on the peripheral wall part.

Preferably, the glue-injection tongues are also distributed through the sides of the thermally conductive back plate at the same time, and the peripheral wall portion simultaneously covers the sides of the thermally conductive panel, the sides of the circuit board, and the sides of the thermally conductive back plate. The sealing colloid further includes a back-side edging portion formed on a rear side of the peripheral wall portion and covering a rear surface edge of the thermally conductive back plate;

Preferably, it further comprises a glue injection via which is distributed through the heat conductive panel, the circuit board and the heat conductive back plate at the same time and distributed around each heat conductive column, and a back which is connected to the sealing gel body and covers the heat conductive column through the glue injection via. The end of the thermally conductive post is covered.

Preferably, the thermally conductive panel and / or the thermally conductive back plate is a plate-like structure formed by punching an aluminum plate and subjecting the surface to an anodizing process + blackening process; and the thermally conductive pillar is a copper structure.

Beneficial effect

The invention uses a thermally conductive panel and a thermally conductive back plate to form a double-layered thermally conductive sheet that holds the LED display lamp board. With the cooperation of a thermally conductive post, the heat generated by direct sunlight and the heat generated by the LED display lamp board can be quickly conducted and dissipated. , Effectively avoiding the series of problems of the display unit module under the traditional process structure due to poor heat dissipation or inability to dissipate heat; at the same time, the use of sealing gel can not only enhance the structural seal of the entire module, but also improve the thermal conductivity of the panel and LED display. The lamp plate and the thermally conductive back plate are subject to secondary locking equivalent to the form of rubber strip riveting to ensure the stability of the module structure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic plan structural view of a front view of an embodiment of the present invention; FIG.

2 is a schematic diagram of a rear-view plane structure according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional structure view taken along A-A in FIG. 2; FIG.

4 is a schematic cross-sectional structure view taken along the line B-B in FIG. 2;

5 is an enlarged schematic view of a partial structure in an exploded state according to an embodiment of the present invention;

6 is an enlarged schematic view of a partial structure of the sealing colloid in FIG. 5;

FIG. 7 is a schematic exploded view of an embodiment of the present invention; FIG.

FIG. 8 is an enlarged schematic view of a partial structure of an area A in FIG. 7; FIG.

FIG. 9 is a schematic exploded view of the embodiment of the present invention after the sealing colloid is simplified;

In the picture:

a. Lamp body vias; b1, guide post vias; b2, guide post vias; c, glue injection tongue;

10, LED display lamp board; 11, circuit board; 12, IC chip; 13, LED light-emitting tube; 20, sealing gel; 21, the main body area; 22, the surrounding wall; 23, colloid tenon; 24 、 Back side edging part; 25. End surface covering part of thermal conductive column; 26. Arc convex; 27. Anti-reflective texture; 28; Striped texture; 30; Thermal conductive panel; 31; First raised rib position; Light point convex rib position; 40. Thermally conductive back plate; 41. Second convex rib position; 42. External fixing nut; 43. First colloidal sealing line; 44. Internal fixing nut; 45. Second colloidal sealing line Network, 50, thermally conductive post, 51, nut part, 52, guide post part, 53, wire tooth part, 60, terminal block box, 61, heat conductive bottom plate, 62, box body, 63, heat dissipation fin, 64, storage Can battery + super capacitor.

Best Mode of the Invention

The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

As shown in FIG. 1 to FIG. 9, a dual thermally conductive sheet plywood type LED display unit module provided in this embodiment includes an LED display light board 10 and a sealing gel 20 (which can be colored and transparent liquid silica gel according to specific conditions) And is formed by a plastic injection molding machine), a thermally conductive panel 30, a thermally conductive back plate 40, and a plurality of thermally conductive columns 50; wherein the LED display lamp board 10 includes a circuit board 11, and an IC mounted on the rear surface of the circuit board 11 The chip 12 and a plurality of LED light-emitting tubes 13 mounted on the front surface of the circuit board 11 and arranged in an array with each other; the circuit board 11 is stacked and clamped between the thermally conductive panel 30 and the thermally conductive back plate 40. A lamp body via a is provided on the upper part and at a position corresponding to each LED light emitting tube 13 for the LED light emitting tube 13 to penetrate therethrough. The front end portion of the thermally conductive post 50 penetrates the thermally conductive back plate 40 and the circuit board 11 in order and is locked. On the heat-conducting panel 30, at the same time, the sealing gel 20 covers the heat-conducting panel 30 and covers at least the heat-conducting panel 30 and the LED display light board 10 as a whole; the heat-conducting panel 30 and the heat-conducting back plate 40 of this embodiment may be based on actual conditions Made of a material plate with good thermal conductivity Molding, such as aluminum sheet metal.

The LED display unit module of this embodiment uses the thermally conductive panel 30 and the thermally conductive back plate 40 to sandwich the LED display light board 10 in a stacked manner, and displays the LEDs through the connection relationship between the thermally conductive pillar 50 and the thermally conductive panel 30. The lamp plate 10, the heat conducting panel 30 and the heat conducting back plate 40 are locked and fixed, so that the entire module constitutes a combination of the LED display lamp plate 10 centered, and the heat conducting panel 30 and the heat conducting back plate 40 located on the front and rear sides of the LED display lamp plate 10. Sandwich structure; at the same time, the sealing gel 20 is used to align the front surface area of the thermally conductive panel 30, the peripheral surface area of the LED display light board 10, the peripheral surface area of the thermally conductive panel 30, and even the peripheral surface area and back of the thermally conductive back plate 40. The local area of the surface is covered and covered; thus, the entire module has the following beneficial effects, specifically:

1. In practical applications (especially when applied in outdoor environments), the structural cooperation between the thermally conductive panel 30, the thermally conductive back plate 40, and the thermally conductive pillars 50 constitutes the heat generated by direct sunlight and the LED display light panel 10 The heat generated during work is a carrier for heat conduction and heat dissipation; among them, the heat conduction panel 30 is covered in the sealing gel 20, and the heat absorbed and accumulated by the heat conduction panel 30 is conducted in a balanced manner on the heat conduction panel 30, and then the heat conduction The post 50 is conducted to the thermally conductive back plate 40 and finally uses the structural characteristics of the large area surface area of the thermally conductive back plate 40 that are exposed to the sealing gel 20 to be radiated to the outside of the module; and because the thermally conductive back plate 40 is close to the circuit board 11 The backside and the IC chip 12 enable the heat generated by the LED display light board 10 to be directly radiated to the outside of the module synchronously from the thermally conductive back plate 40; thus the module itself has good internal heat conduction and external heat dissipation capabilities. This has created conditions for reducing the dead lamp rate, light attenuation and failure frequency of the module, and enhancing the controllability of the module's temperature rise.

2. After the LED display lamp board 10 is locked between the thermally conductive panel 30 and the thermally conductive back plate 40, the three have superimposed structural features and the structural flatness and Rigidity can greatly enhance the flatness and rigidity of the module as a whole.

3. The sealing colloid 20 can be formed by colored and transparent liquid silicone gel after injecting, cooling and solidifying. By using the structural features of the sealing colloid 20 to cover or cover relevant components and areas, it can not only effectively enhance the module's waterproofness and dust resistance, etc. Sealing performance, and the cured sealant 20 can perform secondary locking on the LED display lamp board 10, the heat conducting panel 30, and the heat conducting back plate 40, so as to cooperate with the heat conducting column 50 to complete the structural stability of the entire module.

Embodiments of the invention

As shown in Figures 1 to 9:

To ensure the structural stability of the thermally conductive posts 50 and the thermally conductive panel 30 after being connected, a first raised rib 31 is provided on the thermally conductive panel 30 and at a position corresponding to each thermally conductive post 50 ( When a metal plate, such as a metal plate, has a certain rigidity, the first raised rib position 31 can be formed by pressing in the direction of the circuit board 11 using a stamping process. The raised surface of the first raised rib position 31 is located on the circuit. The front surface side of the plate 11, and the front end portion of the thermally conductive post 50 is locked on the central region of the first raised rib position 31. Therefore, the first raised rib 31 is used to provide a structural space for the heat-conducting column 50 to be fixed on the heat-conducting panel 30.

In view of the material characteristics of the circuit board 11 generally made of fiber material and the particularity of the circuit board 11 in the entire module, in order to prevent the circuit board 11 from being damaged due to the squeezing force generated after the thermal conductive pillar 50 is locked, the thermal conductivity of this embodiment The post 50 can be set by referring to the structure of a hardware connector such as a screw, a screw, or a screw. That is, the post 50 includes a nut portion 51 for rotating the entire heat conducting post 50 and abutting the rear surface side of the heat conducting back plate 40. The central area of the nut portion 51 is axially extended and formed, and penetrates through the heat conductive back plate 40 and the guide post portion 52 distributed on the circuit board 11 at the same time. The wire teeth portion 53 on the first raised rib position 31; wherein the length of the guide post portion 52 is not less than the sum of the thickness of the circuit board 11 and the thickness of the heat conductive back plate 40 (Of course, as a preferred solution, the length of the guide post portion 52 The length is preferably equal to the sum of the thickness of the circuit board 11 and the thermally conductive back plate 40), and the diameter of the wire teeth 53 is smaller than the diameter of the guide post portion 52, so that the entire heat conduction column 50 forms a body similar to the front side with a wire structure and a main body. Partially smooth perimeter and overall platform Type cylindrical structure. When the LED display lamp board 10, the thermally conductive panel 30, and the thermally conductive back plate 40 are locked and assembled, a guide post via hole b1 for the guide post portion 52 to pass through may be opened in the circuit board 11 and the thermally conductive back plate 40 in advance. And b2 (as a preferred solution, the inner diameter of the guide post via hole b1 and the guide post via hole b2 are the same), a guide post via hole b3 is provided at the center of the first raised rib 31 for the wire teeth 53 to be locked. Therefore, after the wire teeth portion 53 is locked on the first raised rib position 31, the front end surface of the guide pillar portion 52 (that is, the transition surface between the guide pillar portion 52 and the wire teeth portion 53) will be in contact with the first The raised surface of the raised rib position 31 abuts, and the nut portion 51 abuts against the back surface of the thermally conductive back plate 40. The front-to-back tensile force generated by the thermally conductive pillar 50 will act on the guide through the first raised rib position 31. The rear-to-front pulling force on the pillar portion 52 will be directly applied to the thermally conductive back plate 40 by the nut portion 51, so that the point force generated by the thermally conductive pillar 50 is converted into the thermally conductive panel 50 and the thermally conductive back plate 40 by Applying force to the area of the circuit board 11 (ie, the area holding force), thereby avoiding the problem that the circuit board 11 is easily damaged due to the local thermal force applied to the circuit board 11 directly by the thermal conductive pillar 50.

In order to enhance the display effect of the module, a lamp point convex rib 32 is provided on the front surface of the thermally conductive panel 30 and on the side of each of the lamp body vias a. During the opening process (such as in the process of stamping and forming), the light point convex rib positions 32 can be directly formed; thus, using the light point convex rib positions 32 can not only form sunshade projections on the sides of each LED light emitting tube 13 to pass through. Blocking the sunlight to improve the contrast of the entire module, and after the injection molding and forming the sealant 20, the lamp point protrusions 32 can play a role of reinforcing ribs inside the sealant 20, thereby effectively slowing the frontal impact on the LED Damage caused by the arc tube 13.

In order to further enhance the display effect of the module, the front surface of the sealing gel 20 of this embodiment may adopt a curved hemp surface structure composed of raised particles (for example, an arc surface is formed in the corresponding area of each LED light emitting tube 13). The protrusions 26 and / or stripe lines 28 are provided on the front surface thereof and / or anti-reflective lines 27 are provided on the front surface of the sealant 20 (the arrangement form may be light bulb convex ribs distributed in rows or rows) The bits 32 are continuously covered to form a multi-striped path. In this way, the curved protrusions 26, the striped pattern 28 and / or the anti-reflective pattern 27 can diffusely reflect the light incident from the outside to prevent the module surface from reflecting, The display effect of the module is further enhanced.

In order to ensure that the heat generated by the LED light emitting tube 13 can be quickly dissipated outward through the thermally conductive back plate 40, a number of thermally conductive copper posts (not shown in the figure, The setting position and number can be arranged according to the number and arrangement relationship of the LED light-emitting tubes 13, such as being arranged in the center area of an array area composed of a plurality of LED light-emitting tubes 13. The rear end surface of the thermally conductive copper pillar and the thermally conductive back plate 40, and the front end surface of the LED light emitting tube 13 can be offset with the bottom surface of one of the LED light emitting tubes 13 in a certain array area. Therefore, the heat collected by the circuit board 11 and even the heat generated by the LED light emitting tube 13 can be quickly conducted to the heat conductive back plate 40 by using the heat conductive copper pillars, so that the heat conductive back plate 40 can be used for rapid heat dissipation.

The IC chip 12 is one of the main heat sources in the LED display lamp board 10. In order to further enhance the heat conduction and heat dissipation effect on the LED display lamp board 10, a second protrusion for accommodating the IC chip 12 is provided on the thermally conductive back plate 40. Reinforcement position 41, which can be formed by pressing the heat conductive back plate 40 such as a metal plate after punching), so that the convex surface of the second raised rib position 41 is located on the rear surface side of the heat conductive back plate 40, thereby using the second protrusion The rib position 41 provides structural space for the placement of the IC chip 12 and enables the IC chip 12 to closely adhere to the front surface of the second raised rib position 41. The direct contact between the IC chip 12 and the thermal back plate 40 is used to achieve rapid heat conduction and heat dissipation. At the same time, a plurality of external fixing nuts 42 distributed in an array are arranged on the convex surface of the second protruding rib position 41, so that the entire module and the display box body can be connected by using the external locking nuts 42. Of course, it should be pointed out that the second raised ribs 41 of this embodiment do not need to correspond to the IC chip 12 one-to-one, and can be set according to a certain circular path, such as set similar to " Back "shape, IC chip 1 at this time 2 can be distributed on the circuit board 11 in a rectangular regular array and fit into the second raised ribs 41, so as to provide conditions for setting the external fixing nut 42 and assembling the entire module into the display case.

In order to enhance the compactness of the assembly of the entire module and the display box body and to seal the connection gap between the two, a peripheral surface covering the external fixing nut 42 is provided on the rear surface of the thermally conductive back plate 40. The first colloidal seal line 43 is distributed along a ring-shaped path formed by a plurality of external fixing nuts 42 connected end to end (also can be understood as being distributed along the outline shape of the first raised rib position 41). The colloidal sealing wire 43 can be formed synchronously by selecting the relevant mold or setting the structure of the module when the sealing colloid 10 is injection-molded (such as the corresponding setting on the thermal conductive panel 30, the circuit board 11 and the thermal conductive back plate 40). Structure of injection vias, etc.). In this way, using the first colloid sealing wire 43 can not only wrap the external fixing nut 42 to prevent it from being attacked by external factors, but also lock the external locking nut 42 and the display case to lock the first colloid. The seal line 43 is pressed, so that the first colloidal seal line 43 has a sealing effect such as waterproofness and dustproofness.

To further provide assembly space for the relevant component parts of the module (such as those for terminal connection or control functions), it is also located on the rear surface of the thermally conductive back plate 40 and within the enclosed area of the first gel seal line 43. A plurality of inner fixing nuts 44 (which can be arranged in a rectangular array) are arranged in an array, and a rear surface of the heat conductive back plate 40 is provided with a peripheral surface covering the inner fixing nuts 44 and The second colloidal seal line 45 is distributed along a circular path formed by end-to-end connection of several pairs of internal fixing nuts 44; at the same time, the module of this embodiment further includes locking to the heat-conducting back by the internal fixing nuts 44 The terminal box 60 on the board 40, and the terminal box 60 includes at least a heat conductive bottom plate 61 stacked on the heat conductive back plate 40 and a box body 62 integrated with the heat conductive bottom plate 61, and is on the outer front surface of the box body 62 There are heat-dissipating fins 63 (of course, the energy storage battery + super capacitor 64, connection terminals and other components can be set in the terminal box 60 according to the actual situation); among them, the molding method of the second gel seal wire 45 can be A first sealing line test colloidal network 43. In this way, the use of the second colloid sealing wire 45 to wrap the inner fixing nut 44 can effectively prevent the inner fixing nut 44 from being attacked by external factors, and at the same time, the second gel is sealed by the terminal box 60 (especially the box body 62). The squeezing effect of the wire network 45 can achieve a sealing effect on the structural gap between the terminal block 60 and the thermally conductive back plate 40, thereby preventing water, dust, and the like from entering the terminal block 60. In addition, the thermally conductive bottom plate 61 and the thermally conductive back plate The contact relationship between the plate 40 and the connection relationship between the internal fixing nut 44 and the heat conductive back plate 40 can quickly conduct the heat accumulated on the heat conductive back plate 40 to the box body 62, and then use the heat dissipation fins 63 for effective air convection. To achieve rapid heat dissipation of the module.

In order to maximize the structure of the entire module, the display module of this embodiment further includes a plurality of glue-injection tongues c (which can be distributed through the sides of the heat-conducting panel 30 and the side of the circuit board 11 at the same time. The case is such as an inverted "V" shape or a dovetail shape), and the sealing gel 20 includes a main body area portion 21 covering the heat conductive panel 30 and a periphery of the main body area portion 21 and at least covering the heat conductive panel 30 at the same time. The peripheral enclosing wall portion 22 of the side and the side of the circuit board 11 is formed on the peripheral enclosing wall portion 22 with a colloidal tenon portion 23 that is filled in the injection hole c. Therefore, in the process of using a raw material such as liquid silica gel to form a sealant gel 20 through injection molding, the liquid raw material is simultaneously filled in the injection molding tongue c to form a colloid during the process of filling and covering the heat conductive panel 30 and the LED light emitting tube 13. The tenon-convex portion 23 and the peripheral wall portion 22 are formed, so that the front and peripheral sides of the module are covered with the sealant 20, which can not only achieve a sealing effect but also effectively cover the heat-conducting panel 30 and the LED display lamp board. 10 and the thermally conductive back plate 40 are reinforced.

The thermally conductive back plate 40 of this embodiment may adopt different structural forms, such as a plate-like structure without a peripheral wall or a shell-like structure with a peripheral wall; as a preferred solution, the thermally-conductive back plate of this embodiment 40 adopts a plate-like structure without a peripheral wall. At this time, a glue injection tenon c is required to be distributed through the sides of the thermally conductive back plate 40 at the same time, while the peripheral wall portion 22 simultaneously covers the sides of the thermally conductive panel 30 and the circuit board 11 side and the side of the heat conductive back plate 40, and in the process of injection molding to form the sealant 20, the injection molding tenon c can be used to simultaneously form a back side edge portion 24 on the rear surface edge of the heat conductive back plate 40 ( That is, it is equivalent to that the sealant 20 includes a back-side beading portion 24), and the back-side beading portion 24 and the rear side of the peripheral wall portion 22 are integrally connected. Thus, the sealing gel 20 can be used to form a covering structure on the edges of the front surface, the peripheral wall surface and the rear surface of the module. While ensuring the structural stability and sealing of the entire module, the heat conductive back plate 40 The rear surface has sufficient and exposed surface area, which provides conditions for good heat dissipation of the module.

In order to further enhance the performance of the entire module, the display module of this embodiment further includes glue injection vias distributed through the thermal conductive panel 30, the circuit board 11 and the thermal conductive back plate 40 and distributed around each thermal conductive pillar 50 (in the figure) (Not shown), in the process of injection molding the sealant 20, the liquid rubber material will flow to the back surface side of the hot backing plate 40 through the injection vias and finally form the filling vias and cover the thermal conductive posts. The back end heat-conducting pillar end-face covering portion 25 of 50. Therefore, by forming the thickness and width of the thermally conductive pillar end surface covering portion 25 by a mold and covering the thermally conductive pillar 50, the thermally conductive pillar 50 is sealed, thereby preventing the thermally conductive pillar 50 from being attacked by external air. Of course, when the heat conducting column 50 is actually arranged, it can be set along the contour side of the module, the contour path of the second colloidal seal line 45, and the contour path of the first colloidal seal line 43, so that it can be set in In the process of injection molding the sealing colloid 20, the thermally conductive backing plate 40 is directly formed on the thermally conductive backing plate 40 through the injection molding via hole on the thermally conductive column end surface covering portion 25, the second colloidal sealing line 45 and the first The colloidal seal line 43 or the second colloidal seal line 45 or the first colloidal seal line 43 is directly used as the thermally conductive post end surface covering portion 25.

In addition, in order to maximize the performance of the entire module, the heat-conducting panel 30 and / or the heat-conducting back plate 40 of this embodiment may be a plate-like structure formed by pressing an aluminum plate and forming the surface by an anodizing process + a blackening process. ; And the thermal conductive pillar 50 is preferably a copper structure. As a result, the thermally conductive panel 30 and the thermally conductive back plate 40 have thermally conductive and non-conductive properties, and the copper thermally conductive pillar 50 facilitates heat conduction between the thermally conductive panel 30 and the thermally conductive back plate 40.

In summary, the LED display unit module of this embodiment effectively solves the dysentery that has existed in the LED outdoor display industry for many years through the improvement of the process structure, specifically:

1. The thermally conductive panel 30 and the thermally conductive back plate 40 made of metal materials such as aluminum are equivalent to the bimetallic thermally conductive sheet holding the LED display lamp board 10. Due to the structural arrangement of the three superimposed on each other, the LED display lamp can be made. The plate 10 and even the entire module have good flatness and enhanced rigidity; at the same time, the bimetal thermally conductive sheet is locked by a certain number of regularly distributed thermally conductive posts 50 to ensure that the entire module has good internal thermal conductivity, and It also has sufficient heat dissipation surface area to the outside, which provides a structural channel for the heat dissipation of the module, and effectively avoids a series of problems of the display unit module under the traditional process structure due to poor heat dissipation or inability to dissipate heat.

2. The use of the lamp point convex ribs 32 provided on the thermally conductive panel 30 not only can block the sun and improve the display contrast of the module, but also because it is encapsulated inside the sealing gel 20, it also acts as an internal reinforcing rib. The function can effectively slow down the mechanical damage caused by the frontal impact on the LED light points, and eliminate the defects that the existing plastic display module plastic mask is easily warped and deformed.

3. Utilizing the structural characteristics such as the matte surface, texture, and tendons of the sealing gel body 20 formed by the liquid glue such as colored transparent silica gel through injection molding and curing mold, it can effectively improve the light output and display effect of the module; Encapsulation or injection molding of the thermally conductive column end covering portion 25, the second colloidal seal line 45, and the first colloidal seal line 43 are equivalent to secondary adhesives. The bimetal sheet and the LED display lamp board 10 are composed of multiple pieces. The rubber posts are riveted, so that the module as a whole has higher strength and better sealing performance. In particular, the second colloidal seal line 45 and the first colloidal seal line 43 are equivalent to the heat conductive back plate 40 formed in the The soft colloid sealing line that can play a role of closing and sealing when the module is assembled, further improves the sealing and waterproof effect of the mold assembly accessories.

4. The space enclosed by the second colloidal sealing wire 45 and the inner fixing nut 44 on the back side of the thermally conductive back plate 40 provides a sealed space for external data lines, power lines, and the like of the LED display unit module.

Industrial applicability

Due to the adoption of the above solution, the present invention uses a thermally conductive panel and a thermally conductive back plate to form a double-layered thermally conductive sheet that holds the LED display lamp plate. With the cooperation of the thermally conductive pillars, the heat generated by direct sunlight and the LED display lamp plate can be generated. The rapid heat conduction and heat dissipation of heat effectively avoids a series of problems caused by poor or incapable heat dissipation of the display unit module under the traditional process structure. At the same time, the use of sealing gel can enhance the structural tightness of the entire module, and can also Secondary locking of the thermally conductive panel, LED display light board and thermally conductive back plate, which is equivalent to the strip riveting, ensures the stability of the module structure.

The above is only a preferred embodiment of the present invention, and thus does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly used in other related The technical field is included in the patent protection scope of the present invention.

Claims

A dual-heat-conducting sheet-clamp type LED display unit module includes an LED display light board. The LED display light board includes a circuit board, an IC chip mounted on a rear surface of the circuit board, and a plurality of chips mounted on the circuit board. LED light-emitting tubes on the front surface of the light-emitting diode and arranged in an array with each other;

It also includes a sealing gel, a thermally conductive panel, a thermally conductive back plate, and a plurality of thermally conductive columns. The circuit board is stacked and clamped between the thermally conductive panel and the thermally conductive back plate. The thermally conductive panel is in phase with each LED light-emitting tube. Corresponding positions are provided with lamp body vias for LED light emitting tubes to pass through. The front end of the thermally conductive post sequentially penetrates the thermally conductive back plate and the circuit board and is locked to the thermally conductive panel. The sealing gel covers the thermally conductive panel. And at least cover the heat conducting panel and the LED display lamp board as a whole.
The dual thermally conductive sheet plywood LED display unit module according to claim 1, wherein a first raised rib position is provided on the thermally conductive panel and at a position corresponding to each thermally conductive post, so The raised surface of the first raised rib position is located on the front surface side of the circuit board, and the front end portion of the thermally conductive post is locked to the first raised rib position.
The dual thermally conductive sheet plywood LED display unit module according to claim 2, wherein the thermally conductive post includes a nut portion abutting on a rear surface side of the thermally conductive back plate, and a center of the nut portion The area is formed after being axially extended and penetrates at the same time through the guide post portion distributed by the heat conductive backplane and the circuit board, and the front end of the guide post portion is axially extended and formed and locked on the wire portion of the first raised rib position. ; The length of the guide post portion is not less than the sum of the thickness of the circuit board and the thickness of the heat conductive back plate, and the front end surface of the guide post portion is in abutment with the convex surface of the first raised rib position, the wire teeth portion Is smaller than the diameter of the guide post portion.
The dual heat-conducting sheet plywood LED display unit module according to claim 1, wherein a lamp point convex rib position is provided on the heat-conducting panel and located on the side of each light body via hole.
The dual heat-conducting sheet plywood LED display unit module according to claim 4, wherein the front surface of the sealing gel is a hemp surface and / or the front surface of the sealing gel is formed to form a line or The rows of light spot convex ribs cover an integrated anti-reflective pattern.
The dual thermally conductive sheet plywood LED display unit module according to claim 1, wherein the circuit board is further provided with a plurality of thermally conductive copper posts distributed through the circuit board, The rear end face is in contact with the thermally conductive back plate.
The dual thermally conductive sheet plywood type LED display unit module according to claim 1, wherein a second convex rib position for accommodating an IC chip is provided on the thermally conductive back plate, and the second convex The raised surface of the rib position is located on the rear surface side of the heat conductive back plate, and the raised surface of the second raised rib position is provided with a plurality of external fixing nuts distributed in an array with each other.
The dual thermally conductive sheet plywood type LED display unit module according to claim 7, characterized in that: the rear surface of the thermally conductive back plate is provided with a peripheral surface covering an external fixing nut and fixed by a plurality of external components along the peripheral surface. The nut serves as the first colloidal sealing network of the annular path formed by the end-to-end connection.
The dual thermally conductive sheet plywood-type LED display unit module according to claim 8, characterized in that: on the rear surface of the thermally conductive back plate and in a surrounding area of the first gel seal line, a plurality of Two inner fixing nuts distributed in an array with each other, the rear surface of the thermally conductive back plate is provided with a ring formed by covering the peripheral surface of the inner fixing nuts and being connected end-to-end by a plurality of inner fixing nuts. Path distribution of the second colloidal seal line;

It also includes a terminal box that is locked to the thermally conductive back plate by a pair of internal fixing nuts. The terminal box at least includes a thermally conductive bottom plate stacked on the thermally conductive back plate and a box body assembled integrally with the thermally conductive bottom plate. Heat dissipation fins are arranged on the front surface of the outside of the box.
The dual thermally conductive sheet plywood LED display unit module according to claim 1, further comprising: a plurality of glue-injection tongues distributed through both the sides of the heat-conducting panel and the sides of the circuit board, The sealing gel includes a main body area portion covered on the heat conduction panel and a peripheral wall portion formed on the periphery of the main body area portion and covering at least the sides of the heat conduction panel and the side of the circuit board at the same time. A colloidal tenon is formed in the wall portion and filled in the gel injection tenon.
The dual thermally conductive sheet plywood LED display unit module according to claim 10, characterized in that the glue injection tenon is also distributed through the sides of the thermally conductive back plate, and the peripheral wall portions are simultaneously covered The side of the thermally conductive panel, the side of the circuit board, and the side of the thermally conductive back plate, and the sealant further includes a back side edge formed on the rear side of the peripheral wall portion and covering the rear surface edge of the thermally conductive back plate. unit.
The dual thermally conductive sheet plywood LED display unit module according to claim 1, further comprising: a glue injection penetrating through the thermally conductive panel, the circuit board, and the thermally conductive back plate and distributed around each thermally conductive post. The via hole and the heat-conducting pillar end surface covering part which is integrated with the sealing gel body through the glue injection via hole and covers the back end of the heat-conducting pillar.
The dual thermally conductive sheet plywood type LED display unit module according to any one of claims 1-12, wherein the thermally conductive panel and / or the thermally conductive back plate is formed by punching an aluminum plate and the surface is subjected to anode A plate-like structure processed by an oxidation process + a blackening process; the thermally conductive pillar is a copper structure.