CN216792635U

CN216792635U - Direct type high-brightness backlight module convenient for heat dissipation

Info

Publication number: CN216792635U
Application number: CN202123356013.7U
Authority: CN
Inventors: 周雪松; 李长岭; 汪海祥
Original assignee: Anhui Siji Electronic Technology Co ltd
Current assignee: Anhui Siji Electronic Technology Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-06-21
Anticipated expiration: 2031-12-29

Abstract

The utility model discloses a direct type high-brightness backlight module convenient for heat dissipation, which comprises a back plate substrate, wherein the top of the back plate substrate is fixedly connected with a plurality of monomer LED lamp sources distributed at equal intervals, each monomer LED lamp source comprises a heat dissipation fin arranged on the top of the back plate substrate, one end of each heat dissipation fin is provided with an inclined surface, the whole body of each heat dissipation fin is arranged in an inclined manner, a heat dissipation groove is formed between every two heat dissipation fins, the tops of the heat dissipation fins are provided with metal substrates, the tops of the metal substrates are provided with insulating layers, and the centers of the tops of the insulating layers are fixedly connected with LED lamp beads. According to the direct type high-brightness backlight module, the LED lamp strip is electrified, the LED lamp beads emit light by matching with the electrodes, and heat generated by the LED lamp beads during long-time work is diffused by matching among the metal substrate, the insulating layer and the radiating fins, so that the purpose of good radiating effect is achieved, and the direct type high-brightness backlight module has the advantage of good radiating effect.

Description

Direct type high-brightness backlight module convenient for heat dissipation

Technical Field

The utility model relates to the technical field of display screens, in particular to a direct type high-brightness backlight module convenient for heat dissipation.

Background

With the development of display technology, the frequency of use of display screens is increasing, large-size and ultra-large-size display screens are also gradually entering the consumer market, the backlight sources of liquid crystal display devices are classified into direct type and side type, direct type is a light emitting device that uniformly arranges LED crystal grains and lenses at the back of a liquid crystal panel as light emitting sources, so that the backlight can be uniformly transmitted to the whole screen, LEDs are all called semiconductor light emitting diodes, and are made of semiconductor materials, so as to directly convert electric energy into light energy and electric signals into optical signals, but LEDs generate a large amount of heat in the use process, if the problem of heat dissipation cannot be solved, the LEDs generate light decay, the display effect of the liquid crystal display device is reduced, the current backlight module of the liquid crystal display device is provided with LEDs, the light bar structure is formed by coating insulating materials on an insulating substrate, a plurality of LED lamp beads are fixed on the insulating layer, a conductive circuit is etched or printed on the insulating layer, the LED lamp beads are connected in series, and the effect of backlight module display can be achieved by gluing the lamp strips which are connected in series or in parallel on the back plate.

In order to improve the brightness of a single lamp source and reduce the number of the lamp beads/lamp strips of the backlight module, the lamp beads/lamp strips with high power need to be used, but the conventional LED backlight module usually adopts natural heat dissipation, the heat dissipation mode has a non-ideal effect and a poor heat dissipation effect, inevitably causes higher temperature rise of the lamp beads and simultaneously affects the heat dissipation of nearby LEDs, a higher temperature gradient can be formed on a circuit board in the peripheral range of the lamp beads, the light emitting color of the LEDs can be affected by the larger temperature gradient existing on the circuit board, the problem of light leakage on the surface of a liquid crystal screen caused by the change of the deflection angle of liquid crystal molecules in the liquid crystal panel is solved, and therefore, the heat of a driving chip needs to be effectively conducted to other low-temperature areas.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a direct type high-brightness backlight module convenient for heat dissipation, which has the advantage of good heat dissipation effect, and solves the problems that the conventional LED backlight module usually adopts natural heat dissipation, the heat dissipation mode effect is not ideal, the heat dissipation effect is poor, the temperature rise of lamp beads is inevitably high, the heat dissipation of nearby LEDs is influenced, a high temperature gradient can be formed on a circuit board in the peripheral range of the lamp beads, the light emitting color of the LEDs can be influenced due to the large temperature gradient on the circuit board, and the light leakage on the surface of a liquid crystal screen can be caused due to the change of the deflection angle of liquid crystal molecules in a liquid crystal panel.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a straight following formula hi-lite backlight module convenient to heat dissipation, includes the backplate base plate, the monomer LED lamp source of the equidistant distribution of a plurality of fixedly connected with of backplate base plate, the monomer LED lamp source includes the radiating fin who sets up at backplate base plate top, radiating fin's one end is equipped with the inclined plane, and wholly is the slope setting, two form the heat dissipation recess between the radiating fin, radiating fin's top is provided with metal substrate, metal substrate's top is provided with the insulating layer, the central fixedly connected with LED lamp pearl of department at insulating layer top, the equal fixedly connected with electrode in both sides at insulating layer top, fixedly connected with LED lamp strip between a plurality of monomer LED lamp source, the both sides in monomer LED lamp source are provided with fixed establishment, backplate base plate passes through fixed establishment fixed connection with monomer LED lamp source.

Preferably, the metal substrate is a copper substrate, the bottom of the metal substrate is fixedly connected with a heat-conducting silica gel layer, the heat-conducting silica gel layer is made of a heat-conducting silica gel sheet, and the heat-conducting silica gel sheet is XK-P45 in model.

Preferably, the insulating layer is a silicon nitride ceramic plate, and the insulating layer is bonded with the metal substrate through heat-conducting rubber.

Preferably, the heat dissipation fins are graphite sheets, the heat dissipation fins are uniformly distributed at equal intervals, and the tops of the heat dissipation fins are fixedly connected with the heat conduction silica gel layer.

Preferably, conducting circuits are arranged inside the LED lamp strips, the conducting circuits are made of tin-coated copper strips, and the two single LED lamp sources are connected in series through the conducting circuits.

Preferably, the top of the insulating layer is fixedly connected with a lamp cap, the LED lamp beads are located in an inner cavity of the lamp cap, and the lamp cap is made of transparent glass.

Preferably, the fixing mechanism comprises a connecting plate fixedly connected with the metal substrate, a fixing screw penetrates through the top of the connecting plate, a screw hole matched with the fixing screw is formed in the top of the back plate substrate, and the screw hole is in threaded connection with the connecting plate.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model leads the LED lamp beads to emit light by electrifying the LED lamp strips and matching with the electrodes, the heat generated by the LED lamp beads during long-time working is diffused by the matching use among the metal substrate, the insulating layer and the radiating fins, thereby achieving the purpose of good heat dissipation effect, ensuring that the direct type high-brightness backlight module has the advantage of good heat dissipation effect, solving the problems that the prior LED backlight module usually adopts natural heat dissipation, the heat dissipation mode has unsatisfactory effect and poor heat dissipation effect, inevitably causes higher temperature rise of the lamp beads, and influences the heat dissipation of nearby LEDs, can form higher temperature gradient on the circuit board at lamp pearl peripheral within range, there is great temperature gradient on the circuit board and can influence LED's luminous colour, also can make liquid crystal molecules deflection angle change in the liquid crystal display panel and cause the problem of LCD screen surface light leak.

2. The utility model uses copper as the material of the metal substrate, so that the metal substrate also has good thermal conductivity, the heat conduction efficiency of the device is further improved by the arrangement of the heat conduction silica gel layer, the heat dissipation effect of the device is improved, the insulating layer has excellent corrosion resistance by using silicon nitride ceramics as the material of the insulating layer, can resist the corrosion of other various acids except hydrofluoric acid, can resist the corrosion of alkali and various metals, and has excellent electrical insulation and radiation resistance, thereby protecting the device and avoiding the short circuit condition, the heat conduction performance of the heat dissipation fins is strong by using graphite sheets as the material of the heat dissipation fins, the heat dissipation effect of the device is greatly improved, the power of a single LED lamp bead can be improved and the number of backboard LED lamp beads is reduced by connecting the single LED lamp source and the single LED lamp source in series, and guarantee that the backplate module satisfies the purpose of display effect, through the setting of lamp cap, protect LED lamp pearl, improve the irradiation area of LED lamp pearl through glass's refraction simultaneously to reached the purpose that improves display effect, through the setting of fixed establishment, improved the stability of monomer LED lamp source when placing, when the monomer LED lamp source breaks down simultaneously, make things convenient for maintenance personal to change it.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a schematic perspective view of a single LED lamp source according to the present invention.

In the figure: 1. a backplane substrate; 2. a single LED lamp source; 2-1, a metal substrate; 2-2, an insulating layer; 2-3, LED lamp beads; 2-4, lamp cap; 2-5, radiating fins; 2-6, electrodes; 3. an LED light bar; 4. a fixing mechanism; 41. a connecting plate; 42. a screw hole; 43. and fixing the screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a direct type high-brightness backlight module convenient for heat dissipation comprises a back plate substrate 1, wherein the top of the back plate substrate 1 is fixedly connected with a plurality of monomer LED lamp sources 2 which are distributed at equal intervals, two sides of each monomer LED lamp source 2 are provided with fixing mechanisms 4, the back plate substrate 1 and each monomer LED lamp source 2 are fixedly connected through the fixing mechanisms 4, each fixing mechanism 4 comprises a connecting plate 41 fixedly connected with a metal substrate 2-1, a fixing screw 43 penetrates through the top of each connecting plate 41, the top of the back plate substrate 1 is provided with a screw hole 42 matched with the fixing screw 43, the screw holes 42 are in threaded connection with the connecting plates 41, the stability of the monomer LED lamp sources 2 during placement is improved through the arrangement of the fixing mechanisms 4, meanwhile, when the monomer LED lamp sources 2 break down, maintenance personnel can conveniently replace the monomer LED lamp sources, each monomer LED lamp source 2 comprises a heat dissipation fin 2-5 arranged on the top of the back plate substrate 1, one end of each radiating fin 2-5 is provided with an inclined plane, the whole radiating fin is arranged in an inclined manner, a radiating groove is formed between the two radiating fins 2-5, the contact area between each radiating fin 2-5 and a space is increased by using the arrangement of the radiating groove, so that the heat of each radiating fin 2-5 is favorably radiated, the top of each radiating fin 2-5 is provided with a metal substrate 2-1, each metal substrate 2-1 is a copper substrate, the bottom of each metal substrate 2-1 is fixedly connected with a heat-conducting silica gel layer, the heat-conducting silica gel layer is made of a heat-conducting silica gel sheet, the type of the heat-conducting silica gel sheet is XK-P45, the metal substrate 2-1 also has good heat conductivity by using copper as the material of the metal substrate 2-1, and the heat-conducting efficiency of the device is further improved by the arrangement of the heat-conducting silica gel layer, thereby improving the heat dissipation effect of the device, the heat dissipation fins 2-5 are graphite sheets, the heat dissipation fins 2-5 are uniformly distributed at equal intervals, the top parts of the heat dissipation fins 2-5 are fixedly connected with a heat conduction silica gel layer, the heat conduction performance of the heat dissipation fins 2-5 is strong by using the graphite sheets as the material of the heat dissipation fins 2-5, the heat dissipation effect of the device is greatly improved, the top part of the metal substrate 2-1 is provided with an insulating layer 2-2, the insulating layer 2-2 is a silicon nitride ceramic plate, the insulating layer 2-2 is bonded with the metal substrate 2-1 through heat conduction rubber, the insulating layer 2-2 has excellent corrosion resistance by using the silicon nitride ceramic as the material of the insulating layer 2-2, besides hydrofluoric acid, the device can resist the corrosion of other various acids and can resist the corrosion of various alkali metals, the LED lamp has excellent electrical insulation and radiation resistance, the device is further protected, short circuit is avoided, the LED lamp bead 2-3 is fixedly connected to the center of the top of the insulating layer 2-2, the lamp cap 2-4 is fixedly connected to the top of the insulating layer 2-2, the LED lamp bead 2-3 is located in the inner cavity of the lamp cap 2-4, the lamp cap 2-4 is made of transparent glass, the LED lamp bead 2-3 is protected through the arrangement of the lamp cap 2-4, meanwhile, the irradiation area of the LED lamp bead 2-3 is increased through the refraction of the glass, the purpose of improving the display effect is achieved, electrodes 2-6 are fixedly connected to two sides of the top of the insulating layer 2-2, LED lamp strips 3 are fixedly connected among a plurality of single LED lamp sources 2, conductive circuits are arranged inside the LED lamp strips 3, and are made of tin-coated copper strips, two single LED lamp sources 2 are connected in series through conducting circuits, and the single LED lamp sources 2 are connected in series with the single LED lamp sources 2, so that the power of a single LED lamp bead 2-3 can be improved, the number of backboard LED lamp beads 2-3 is reduced, and the backboard module is ensured to meet the purpose of displaying effect.

The working principle is as follows: when the LED lamp is used, a user energizes the LED lamp strip 3, the LED lamp bead 2-3 is illuminated by matching with the electrode 2-6, light rays illuminated by the LED lamp bead 2-3 are refracted by the lamp cap 2-4, so that the illumination area of the LED lamp bead 2-3 is increased, and the purpose of improving the display effect is achieved, heat generated when the LED lamp bead 2-3 works for a long time is absorbed by the insulating layer 2-2 and is conducted to the metal substrate 2-1, the metal substrate 2-1 conducts the heat to the heat dissipation fins 2-5 through the heat conduction silica gel layer, the heat dissipation fins 2-5 fully absorb the heat and conduct the heat to the back plate substrate 1 to dissipate the heat, and the contact area with the air is enlarged through the heat dissipation groove formed between the two heat dissipation fins 2-5, the heat dissipation fins 2-5 can quickly interact with air to dissipate heat, and finally the direct type high-brightness backlight module achieves the purpose of good heat dissipation effect.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a straight following formula hi-lite backlight unit convenient to heat dissipation, includes backplate base plate (1), its characterized in that: the LED lamp comprises a back plate substrate (1), wherein the top of the back plate substrate (1) is fixedly connected with a plurality of monomer LED lamp sources (2) which are distributed at equal intervals, each monomer LED lamp source (2) comprises a radiating fin (2-5) arranged at the top of the back plate substrate (1), one end of each radiating fin (2-5) is provided with an inclined plane, the whole radiating fins are arranged in an inclined manner, a radiating groove is formed between every two radiating fins (2-5), the top of each radiating fin (2-5) is provided with a metal substrate (2-1), the top of each metal substrate (2-1) is provided with an insulating layer (2-2), the center of the top of each insulating layer (2-2) is fixedly connected with an LED lamp bead (2-3), the two sides of the top of each insulating layer (2-2) are fixedly connected with electrodes (2-6), and LED lamp strips (3) are fixedly connected among the monomer LED lamp sources (2), fixing mechanisms (4) are arranged on two sides of the single LED lamp source (2), and the backboard substrate (1) is fixedly connected with the single LED lamp source (2) through the fixing mechanisms (4).

2. The direct-lit high brightness backlight module for facilitating heat dissipation of claim 1, wherein: the metal substrate (2-1) is a copper substrate, and a heat conduction silica gel layer is fixedly connected to the bottom of the metal substrate (2-1).

3. The direct-lit high brightness backlight module for facilitating heat dissipation of claim 1, wherein: the insulating layer (2-2) is a silicon nitride ceramic plate, and the insulating layer (2-2) is bonded with the metal substrate (2-1) through heat conducting rubber.

4. The direct-lit high brightness backlight module for facilitating heat dissipation of claim 2, wherein: the heat dissipation fins (2-5) are graphite sheets, the heat dissipation fins (2-5) are uniformly distributed at equal intervals, and the tops of the heat dissipation fins (2-5) are fixedly connected with the heat conduction silica gel layer.

5. The direct-lit high brightness backlight module for facilitating heat dissipation of claim 1, wherein: conductive circuits are arranged inside the LED lamp strips (3), and the two single LED lamp sources (2) are connected in series through the conductive circuits.

6. The direct-lit high brightness backlight module for facilitating heat dissipation of claim 1, wherein: the top of the insulating layer (2-2) is fixedly connected with a lamp cap (2-4), the LED lamp beads (2-3) are located in an inner cavity of the lamp cap (2-4), and the lamp cap (2-4) is made of transparent glass.

7. The direct-lit high brightness backlight module for facilitating heat dissipation of claim 1, wherein: the fixing mechanism (4) comprises a connecting plate (41) fixedly connected with the metal substrate (2-1), a fixing screw (43) penetrates through the top of the connecting plate (41), a screw hole (42) matched with the fixing screw (43) is formed in the top of the back plate substrate (1), and the screw hole (42) is in threaded connection with the connecting plate (41).