CN210982984U

CN210982984U - Direct type backlight module and L ED liquid crystal display television with same

Info

Publication number: CN210982984U
Application number: CN201921918275.8U
Authority: CN
Inventors: 陈燕平; 李幼伟; 孙军昂
Original assignee: Dongguan City Tuopulaisi Photoelectric Technology Co ltd
Current assignee: Dongguan City Tuopulaisi Photoelectric Technology Co ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-07-10
Anticipated expiration: 2029-11-07

Abstract

The utility model discloses a straight following formula backlight unit, and L ED LCD TV with straight following formula backlight unit is disclosed, wherein straight following formula backlight unit includes backplate, a plurality of L ED lamp strip, reflector plate and diffusion subassembly has seted up the heat dissipation through-hole on the backplate, and its inboard is provided with the backlight that L ED constitutes side by side, and the heat dissipation through-hole is seted up on backplate and the corresponding face of L ED lamp strip, and L ED lamp strip seals the heat dissipation through-hole, the reflector plate sets up the one side of keeping away from the backplate at L ED lamp strip, diffusion subassembly includes diffuser plate and diffusion piece, and sets gradually the one side of keeping away from the backplate at the reflector plate, according to the utility model discloses an L ED lamp strip and backplate, the material of backplate can not be restricted to the better metal material of heat conductivity, and a heat dissipation mode is no less than in the heat accessible that L ED lamp strip during operation produced, and the structure is more simple, easily installs, has.

Description

Direct type backlight module and L ED liquid crystal display television with same

Technical Field

The utility model relates to a TV set production technical field, in particular to straight following formula backlight unit and L ED LCD TV that has it.

Background

L A liquid crystal display device of an ED liquid crystal television comprises a liquid crystal panel and a backlight module, wherein the liquid crystal panel does not emit light, and needs a light source provided by the backlight module to normally display images, and the backlight module is divided into a direct type backlight module and a side type backlight module according to different incidence modes of the light source, wherein the direct type backlight module arranges L ED light bars to form a backlight source and is arranged in a back plate right behind the liquid crystal panel.

Among the prior art, L ED lamp strip during operation can produce the heat, and straight following formula backlight unit's radiating mode is the backplate heat conduction formula heat dissipation through installing the lamp strip, and the radiating mode is single, and the radiating effect still lacks, and requires the backplate material to use the metal material that the heat conductivity is good.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a straight following formula backlight unit, straight following formula backlight unit can dispel the heat through three kinds of modes of radiation formula heat dissipation, air convection formula heat dissipation and heat conduction formula heat dissipation.

The utility model also provides an L ED LCD TV with above-mentioned straight following formula backlight unit.

The utility model discloses a straight following formula backlight module of first aspect embodiment, including the backplate, seted up heat dissipation through-hole, a plurality of L ED lamp strips set up side by side on the backplate and constitute the backlight, and be located the backplate inboard, heat dissipation through-hole set up in the backplate with on the face that L ED lamp strip corresponds, and L ED lamp strip seals heat dissipation through-hole, the reflector plate, set up in the backplate inboard, and be located one side that L ED lamp strip kept away from the backplate, set up the intercommunication mouth that allows L ED chip on L ED lamp strip to expose on the reflector plate, diffusion subassembly, set up in the backplate inboard, including diffuser plate and diffusion piece, diffuser plate and diffusion piece set gradually in the reflector plate keep away from backplate one side.

According to the utility model discloses direct type backlight module, at least, following beneficial effect has through set up the through-hole on backplate and L ED lamp strip corresponding face, make L ED lamp strip can be direct and outside air contact, when L ED lamp strip work produced heat, can carry out the radiant heat dissipation through the through-hole of seting up on the backplate, and outside air is because the result temperature of radiation rises, volume expansion rises, there is cold air supply its bottom, thereby make direct type backlight module can also be through the air convection formula heat dissipation, only a small amount of heat carries out the heat conduction formula heat dissipation through the backplate, make the radiating effect promote through these three kinds of radiating mode.

According to some embodiments of the present invention, the L ED light bar includes a strip substrate and a L ED chip attached to the strip substrate.

According to some embodiments of the present invention, the strip-shaped substrate is made of any one of aluminum, copper, and ceramic.

According to some embodiments of the utility model, straight following formula backlight unit is still including fixed adhesive tape, fixed adhesive tape set up in around the backplate, and will the reflector plate with diffusion subassembly compresses tightly to be fixed on the backplate.

According to the utility model discloses a some embodiments, arrange in the outside of backplate and be provided with sunken line, correspond L ED lamp strip position the line is sunken until the intercommunication the inside of backplate is in order to form the heat dissipation through-hole.

According to some embodiments of the invention, the lines are arranged in any one or more of a star, a cross, a circle and a square.

According to some embodiments of the utility model, the backplate corresponds the position of both sides is provided with the pothook about L ED lamp strip, the pothook including with the connecting portion that the backplate is connected with to L ED lamp strip limit portion of a lateral buckling.

According to some embodiments of the utility model, be provided with constant head tank and fixed orifices on L ED lamp strip.

According to some embodiments of the utility model, be provided with spacer and installation screw on the backplate, the spacer inserts in the constant head tank, the installation screw sets up on the position that the fixed orifices corresponds.

According to the utility model discloses L ED LCD TV of second aspect embodiment, include according to the utility model discloses straight following formula backlight unit of above-mentioned first aspect embodiment.

According to the utility model discloses L ED LCD TV has following beneficial effect at least through adopting above-mentioned straight following formula backlight unit, has increased L ED LCD TV's radiating mode, has promoted the radiating effect, and simple structure easily installs moreover, has saved cost of manufacture and process flow.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of an inner side of a back plate and L ED light bars of a direct type backlight module according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an outer side structure of a back plate of a direct type backlight module according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a direct type backlight module according to an embodiment of the present invention;

fig. 4 is a schematic partial enlarged view of an inner side of a back plate of a direct type backlight module according to an embodiment of the present invention;

fig. 5 is a partially enlarged schematic view of a cross-sectional view of a direct type backlight module according to an embodiment of the present invention.

Reference numerals:

the direct type backlight module 100, a back plate 110, a heat dissipation through hole 111, a concave texture 112, a positioning plate 113, an installation screw hole 114, a hook 115, a positioning baffle 116, a notch 117, an L ED light bar 120, a strip-shaped base material 121, a L ED chip 122, a positioning groove 123, a fixing hole 124, a reflecting plate 130, a diffusion component 140, a diffusion plate 141, a diffusion sheet 142 and a fixing adhesive tape 150.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, inner, outer, etc., is the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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 thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of meanings + + are one or more, a plurality of meanings are two or more, and a larger, smaller, larger, or the like is understood as not including the number, and a larger, smaller, or the like is understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

A direct type backlight module 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 5.

As shown in fig. 1 and 5, a direct type backlight module 100 according to an embodiment of the present invention includes a back plate 110, a plurality of L ED light bars 120, a reflective sheet 130, and a diffusion component 140.

The back plate 110 is provided with a heat dissipation through hole 111, a plurality of L ED light bars 120 are arranged side by side on the inner side of the back plate 110 to form a backlight source, the heat dissipation through hole 111 is arranged on the corresponding surface of the back plate 110 and the L ED light bars 120 and is sealed by the L ED light bars 120, the reflection sheet 130 is arranged on the inner side of the back plate 110 and is positioned on one side of the L ED light bars 120 away from the back plate 110, the reflection sheet 130 is provided with a through hole allowing L ED chips 122 on the L ED light bars 120 to be exposed, and the diffusion component 140 comprises a diffusion plate 141 and a diffusion sheet 142, is arranged on the inner side of the back plate 110 and is.

For example, as shown in fig. 1 and 5, a heat dissipation through hole 111 is formed in a back panel 110, reinforcing ribs are disposed on an inner side of the back panel, two L ED light bars 120 are disposed between two lateral reinforcing ribs to form a backlight, the heat dissipation through hole 111 is formed in a corresponding surface of the back panel 110 and L ED light bars 120, and extends to a position where the heat dissipation through hole can contact L ED light bars 120 and is closed by L ED light bars 120, a reflection sheet 130 is disposed in the back panel 110 on a side of the back panel 110 where the L ED light bars 120 are far away from the back panel 110, a through hole allowing a L ED light bar 120 to be exposed is further formed in the reflection sheet 130, a diffusion assembly 140 includes a diffusion plate 141 and a diffusion sheet 142 disposed inside the back panel 110 and sequentially disposed on a side of the reflection sheet 130 far away from the back panel 110, positioning holes are also disposed around the diffusion plate 141 and the diffusion sheet 142 to be matched.

Specifically, when the direct type backlight module is applied to an L ED liquid crystal television, heat generated by the operation of the L ED light bar 120 can be radiated in a radiation type and an air convection type through the heat radiation through holes 111 formed in the back plate 110, and only a small amount of heat can be conducted in a heat conduction type through the back plate 110, so that when the direct type backlight module is applied to a L ED liquid crystal television, heat can be radiated in a plurality of heat radiation modes, the heat radiation effect of the L ED liquid crystal television is greatly improved, the situation that the back plate 110 is not limited to be made of metal materials with good heat conductivity is avoided, L ED light bar 120 emits light to form a backlight source, the utilization rate of light is improved through reflection of the reflection sheet 130, and the backlight source can be emitted out from the front surface after being uniformly dispersed, so that the L ED liquid crystal television is simpler and more convenient in structure, and faster in installation, and.

According to some embodiments of the present invention, L ED light bar 120 of direct type backlight module includes strip substrate 121 and L ED chip 122 attached to the strip substrate 121, for example, as shown in fig. 1, L ED chip 122 is attached to the strip substrate 121 through surface mounting technology, specifically, L ED light bar 120 includes strip substrate 121 and L ED chip 122, and L ED chip 122 is attached to the strip substrate 121 through surface mounting technology, when L ED chip 122 starts to work, heat can be transferred to back plate 110 through strip substrate 121, and radiation type heat dissipation and air convection type heat dissipation are performed through heat dissipation through hole 111 provided on back plate 110, and only a small amount of heat is heat-conducted through back plate 110.

According to some embodiments of the present invention, the strip-shaped substrate 121 of the L ED light bar 120 in the direct-type backlight module is made of any one of aluminum, copper, and ceramic, specifically, the strip-shaped substrate 121 in this embodiment is preferably made of aluminum, the aluminum substrate has a good heat dissipation function, the processing is easy and the cost is low, the aluminum surface has a layer of dense alumina, the good anti-oxidation corrosion effect is achieved, the aluminum can be recycled after being used for a period of time, the environmental protection can be regenerated.

According to the utility model discloses a few embodiments, straight following formula backlight unit is still including fixed adhesive tape 150, and fixed adhesive tape 150 sets up around backplate 110. For example, as shown in fig. 5, the fixing strip 150 is disposed around the back plate 110. Specifically, at least four fixing adhesive tapes 150 are used around the back plate 110 to press and fix the reflection sheet 130 and the diffusion component 140 onto the back plate 110.

According to some embodiments of the utility model, the backplate 110 outside of straight following formula backlight unit is arranged and is provided with sunken line, the line that corresponds L ED lamp strip 120 position part is sunken until the inside of intercommunication backplate 110 is in order to form heat dissipation through-hole 111 for example, as shown in fig. 2, the outside of backplate 110 is arranged and is provided with sunken line, the line that corresponds two L ED lamp strip 120 positions is sunken until intercommunication backplate 110 is inboard, and extend to can contact L ED lamp strip 120, make it form by L ED lamp strip 120 confined heat dissipation through-hole 111 specific, backplate 110 inboard is provided with the strengthening rib, L ED lamp strip 120 places between two horizontal strengthening ribs, for guaranteeing straight following formula backlight unit's leakproofness, need use L ED lamp strip 120 to seal heat dissipation through-hole 111, for this reason, the sunken line 112 that forms heat dissipation through-hole 111 still need extend to and be as high with vertical strengthening rib, and with L ED lamp strip 120 contact.

According to some embodiments of the present invention, the recessed lines 112 outside the back plate 110 of the direct-type backlight module are arranged in any one or more of a star shape, a cross shape, a circle shape and a square shape. For example, as shown in fig. 2, a cross-shaped concave vein 112 is preferable in the present embodiment. Specifically, the arrangement among the lines is facilitated by the aid of the cross-shaped concave lines 112, the appearance is more attractive, and the formed cross-shaped heat dissipation through holes 111 are easy to process, not prone to deformation and good in heat dissipation effect. It is contemplated that the recessed ridges 112 may be configured in any one or more of a star shape, a circular shape, and a square shape, and the cross shape is merely preferred in the present embodiment and is not a specific limitation of the present invention.

According to some embodiments of the utility model, the position that backplate 110 corresponds L ED lamp strip 120 upper and lower both sides in the straight following formula backlight unit is equipped with pothook 115, pothook 115 including the connecting portion of being connected with backplate 110 and the restriction portion of buckling to L ED lamp strip 120 one side, for example, as shown in fig. 1 and 4, L ED lamp strip 120 upper and lower both sides are crisscross to be provided with four pothooks 115, and two pothooks 115 and positioning baffle 116 about L ED lamp strip 120's both ends set up, specifically, breach 117 has still been seted up with the corresponding strengthening rib of partial pothook 115, can make things convenient for L ED lamp strip 120 to place and mention.

According to some embodiments of the present invention, positioning grooves 123 and fixing holes 124 are disposed on L ED light bars 120 of a direct type backlight module, for example, as shown in fig. 1 and 4, positioning grooves 123 are disposed in the middle of L ED light bars 120, and fixing holes 124 are disposed on both sides of the L ED light bars 120. specifically, positioning grooves 123 are substantially rectangular trapezoids, and locking positions are disposed between the long bottom and the oblique side of the positioning grooves 123, and circular fixing holes 124 are disposed on both sides of L ED light bars 120. positioning grooves 123 and fixing holes 124 are disposed on L ED light bars 120, so that L ED light bars 120 can be positioned and fixed in various ways.

According to some embodiments of the present invention, the inner side of the back plate 110 of the direct type backlight module is provided with the positioning piece 113 and the installation screw hole 114, the positioning piece 113 is inserted into the positioning groove 123 of the L ED light bar 120, and the installation screw hole 114 is disposed at the position corresponding to the fixing hole 124. for example, as shown in fig. 1 and 4, the positioning piece 113 on the back plate 110 corresponds to the positioning groove 123 on the L ED light bar 120, and the positioning piece 113 can be clamped into the clamping position of the positioning groove 123 to fix the L ED light bar 120. the installation screw hole 114 formed on the back plate 110 corresponds to the fixing hole 124 on the L ED light bar 120, so that the back plate 110 and the L ED light bar 120 can be further fixed by being connected by bolts.

According to the utility model discloses L ED LCD TV through adopting foretell straight following formula backlight unit 100, has increased L ED LCD TV's radiating mode, has promoted the radiating effect, simple structure moreover, and manufacturing cost and process flow have been saved in easily installation.

Other configurations and operations of the L ED LCD TV according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail herein.

The following describes a direct type backlight module 100 according to an embodiment of the present invention in detail with reference to fig. 1 to 5. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.

As shown in fig. 1 to 5, the direct type backlight module 100 includes a back plate 110, a plurality of L ED light bars 120, a reflective sheet 130 and a diffusion assembly 140, the back plate 110 is provided with a heat dissipation through hole 111, and the inner side of the back plate is provided with a stiffener, two L ED light bars 120 are disposed between two lateral stiffeners to form a backlight, the heat dissipation through hole 111 is disposed on a corresponding surface of the back plate 110 and L ED light bars 120, and extends to the same height as the vertical stiffener, contacts the L ED light bars 120 and is sealed by the L ED light bars 120, the reflective sheet 130 is disposed in the back plate 110 at a side of the L ED light bars 120 away from the back plate 110, and is further provided with a through hole for exposing the L ED chip 122 on the L ED light bars 120, positioning grooves 123 and positioning sheets 113 are disposed around the back plate 110, the reflective sheet 130 is engaged with the positioning holes disposed around the reflective sheet 113 of the back plate 110, the diffusion assembly 140 includes a diffusion plate 141 and a diffusion sheet 142 disposed inside the back plate 110, and is sequentially disposed around the reflective sheet 130 at a side away from the.

The L ED light bar 120 comprises a strip-shaped substrate 121 and a L ED chip 122 attached to the strip-shaped substrate 121, the L ED chip 122 is attached to the strip-shaped substrate 121 by surface mount technology, the strip-shaped substrate 121 of the L ED light bar 120 can be made of any one of aluminum, copper and ceramic, preferably aluminum in the embodiment, and the direct type backlight module further comprises a fixing adhesive tape 150 arranged around the back plate 110 to press and fix the reflection sheet 130 and the diffusion component 140 on the back plate 110.

Concave grains are distributed on the outer side of the back plate 110, the grains corresponding to the L ED light bar 120 are concave until the grains are communicated with the inner side of the back plate 110 and extend to be capable of contacting with the L ED light bar 120 to form a heat dissipation through hole 111 sealed by the L ED light bar 120, the concave grains 112 can be set to be any one or more of star-shaped, cross-shaped, circular and square, in the embodiment, the cross-shaped concave grains 112 are preferred, four hooks 115 are staggered on the inner side of the back plate 110 corresponding to the positions of the upper side and the lower side of the L ED light bar 120, each hook 115 comprises a connecting part connected with the back plate 110 and a limiting part bent towards one side of the L ED light bar 120, two upper hooks 115 and two positioning baffles 116 are arranged at two ends of the L ED light bar 120, notches 117 are further formed in reinforcing ribs corresponding to part of the hooks 115 to facilitate the placement and lifting of the L ED light bar 120, a positioning groove 123 is formed in the middle position of the L ED light bar 120, two fixing holes 124 are respectively formed in the two sides, a positioning sheet 113 and a mounting screw hole 114 are formed in the positioning groove 114, and a corresponding to the positioning groove 124 of the ED light bar.

Specifically, when L ED lamp strip 120 starts working, the heat generated carries out radiation type heat dissipation and air convection type heat dissipation through-hole 111 that sets up on backplate 110, and only a small amount of heat carries out heat conduction type heat dissipation through backplate 110. L ED lamp strip 120 is luminous and forms the backlight, can improve the utilization ratio of light through reflector plate 130 reflection, and loop through diffuser plate 141 and diffusion sheet 142 again, can make the backlight jet out in the front after evenly dispersing, wherein, diffuser plate 141 mainly plays the effect of supporting diffusion sheet 142. heat dissipation through-hole 111 relies on L ED lamp strip 120 backplate 110 to realize the leakproofness of straight following formula backlight unit, avoid the dust to get into and cause the bad display in straight following formula backlight unit.

According to the utility model discloses straight following formula backlight unit through so setting up, can reach some effects as follows at least, has increased straight following formula backlight unit's radiant type heat dissipation and the radiating heat dissipation mode of air convection formula, and has improved straight following formula backlight unit's radiating effect, and backplate 110 that uses simultaneously is no longer limited to the metal material that the heat conductivity is good, and the structure is more simple, easily installs, has saved cost of manufacture and process flow.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "specifically," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A direct type backlight module is characterized by comprising:

the back plate is provided with a heat dissipation through hole;

the L ED light bars are arranged on the back plate side by side to form a backlight source and are positioned on the inner side of the back plate, the heat dissipation through holes are formed in the surface of the back plate corresponding to the L ED light bars, and the L ED light bars seal the heat dissipation through holes;

the reflector plate is arranged on the inner side of the back plate and is positioned on one side of the L ED lamp strip, which is far away from the back plate, and the reflector plate is provided with a through hole for exposing the L ED chip on the L ED lamp strip;

and the diffusion assembly is arranged on the inner side of the back plate and comprises a diffusion plate and a diffusion sheet, and the diffusion plate and the diffusion sheet are sequentially arranged on one side, away from the back plate, of the reflection sheet.

2. The direct type backlight module of claim 1, wherein the L ED light bars comprise a strip substrate and L ED chips attached to the strip substrate.

3. The direct-type backlight module as claimed in claim 2, wherein the strip-shaped substrate is made of any one of aluminum, copper and ceramic.

4. The direct type backlight module according to claim 1, further comprising a fixing adhesive tape disposed around the back plate for pressing and fixing the reflection sheet and the diffusion assembly (140) to the back plate.

5. The direct type backlight module of claim 1, wherein the outer side of the back plate is provided with concave patterns, and a portion of the patterns corresponding to the L ED light bars is concave until the inner portion of the back plate is communicated to form the heat dissipation through holes.

6. The direct type backlight module according to claim 5, wherein the textures are arranged in any one or more of a star shape, a cross shape, a circular shape and a square shape.

7. The direct type backlight module of claim 1, wherein hooks are disposed on the back plate corresponding to upper and lower sides of the L ED light bar, and the hooks include a connecting portion connected to the back plate and a limiting portion bent toward one side of the L ED light bar.

8. The direct type backlight module as claimed in claim 1, wherein the L ED light bars have positioning grooves and fixing holes.

9. The direct type backlight module according to claim 8, wherein the back plate has a positioning plate and a mounting screw hole, the positioning plate is inserted into the positioning groove, and the mounting screw hole is disposed at a position corresponding to the fixing hole.

10. An L ED LCD TV characterized by comprising the direct type backlight module as claimed in any one of claims 1 to 9.