CN211454174U

CN211454174U - Direct type backlight module

Info

Publication number: CN211454174U
Application number: CN202020161028.4U
Authority: CN
Inventors: 刘欣
Original assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Current assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Priority date: 2020-02-13
Filing date: 2020-02-13
Publication date: 2020-09-08
Anticipated expiration: 2030-02-13

Abstract

The utility model provides a straight following formula backlight unit, straight following formula backlight unit includes: the liquid crystal display panel comprises a back plate, a liquid crystal panel connected with the back plate and a light-emitting module arranged between the back plate and the liquid crystal panel; the light emitting module includes: the light-emitting modules are arranged on the back plate and face the liquid crystal panel; a reflective sheet laid on the back plate; the support columns are arranged on the back plate and located between the adjacent light-emitting modules, the support columns are connected with the reflector plate in a clamping mode, and the support columns are used for supporting the back plate and the liquid crystal panel so that the light-emitting modules can be accommodated between the back plate and the liquid crystal panel. The utility model discloses a set up the installation department of block installation in support column below, avoid using the bolt to fix again to make the casing backplate more pleasing to the eye, the installation is more simple and convenient, simultaneously, establishes the reflector plate cover around the support column, thereby can not restrict the shrinkage that rises with heat of reflector plate, avoids taking place the condition that reflector plate extrusion is bloated.

Description

Direct type backlight module

Technical Field

The utility model relates to a display backlight unit field especially relates to a straight following formula backlight unit.

Background

With the continuous development of science and technology, the size and shape of the display also continuously change, gradually become lighter and thinner, and more beautifully develop, for example, many manufacturers are all pursuing the comprehensive screen television of development nowadays, and the frame of this kind of novel television is extremely narrow, and thickness is very thin, consequently also is higher to backlight unit's technical quality requirement.

In the prior art, as shown in fig. 4 of the attached drawings of the specification, a support column in a backlight module is fixed on a back plate through two bolts, and during actual assembly, a reflector plate is pressed below the support column and is penetrated and fixed by the bolts, so that the reflector plate has no moving space, and when the reflector plate is in an overcooled or overheated environment, free thermal expansion and cold contraction cannot be performed, so that local bulges and the like are generated, and the backlight effect is affected; on the other hand, the bolt hole has been destroyed to the backplate needs to predetermine, and the wholeness of backplate has been destroyed, and the process of bolt installation is loaded down with trivial details simultaneously, leads to inefficiency, has increased the cost.

Thus, there is still a need for improvement and development of the prior art.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, backlight unit support column installation need use the screw among the prior art, and it is pleasing to the eye to influence the casing, and the support column sticiss the reflector plate simultaneously, has hindered the shrinkage with heat that rises of reflector plate, leads to the reflector plate local area to warp easily.

The utility model provides a technical scheme that technical problem adopted as follows:

a direct type backlight module, wherein the direct type backlight module comprises: the liquid crystal display panel comprises a back plate, a liquid crystal panel connected with the back plate and a light-emitting module arranged between the back plate and the liquid crystal panel;

the light emitting module includes: the plurality of light-emitting modules are arranged on the back plate and face the liquid crystal panel; a reflective sheet laid on the back plate; the supporting columns are arranged on the back plate and located between the adjacent light-emitting modules, the supporting columns are connected with the reflector plate in a clamping mode, and the supporting columns are used for supporting the back plate and the liquid crystal panel so that the light-emitting modules are contained between the back plate and the liquid crystal panel.

The direct type backlight module comprises a support column, a reflector plate and a support base, wherein the support column specifically comprises a support platform and a support main body arranged on the support platform, and the support platform is connected with the reflector plate in a clamping manner.

The direct type backlight module comprises a supporting platform, a limiting plate and a bottom boss, wherein the supporting platform is arranged in an inverted ladder shape and comprises the limiting plate and the bottom boss arranged below the limiting plate, and the bottom boss is clamped with a through hole preset in a reflector plate.

The direct type backlight module is characterized in that the through hole is the same as the bottom boss in shape, and the size of the through hole is larger than that of the bottom boss.

The direct type backlight module is characterized in that the lower mounting surface of the bottom surface boss and the back plate are fixed through an adhesive.

The direct type backlight module, wherein the light emitting module comprises: the LED lamp is characterized in that the printed circuit board attached to the inner side of the back plate is in circuit connection with an LED lamp bar used for emitting light, and a lens is coated above the LED lamp bar.

The direct type backlight module is characterized in that a diffusion membrane used for scattering light rays is arranged below the liquid crystal panel, the diffusion membrane is arranged between the reflector plate and the liquid crystal panel and is used for fixing the reflector plate, and the central area of the diffusion membrane is supported by the support columns.

The direct type backlight module is characterized in that the liquid crystal panel is arranged at an opening above the back plate and used for displaying backlight pictures, and the liquid crystal panel is fixed through a middle frame arranged between the liquid crystal panel and the back plate.

The direct type backlight module is characterized in that the middle frame is of a T-shaped annular structure, the lower portion of the middle frame is sleeved on the outer side of the back plate and is clamped and fixed, and the liquid crystal panel is buckled on the upper portion of the middle frame.

The direct type backlight module is characterized in that the supporting columns are integrally formed components made of PC or PMMA materials.

The technical effects of the utility model: the utility model discloses a set up the installation department of block installation in support column below, avoid using the bolt to fix again to make the casing backplate more pleasing to the eye, the installation is more simple and convenient, simultaneously, establishes the reflector plate cover around the support column, thereby can not restrict the shrinkage that rises with heat of reflector plate, avoids taking place the condition that reflector plate extrusion is bloated.

Drawings

Fig. 1 is a schematic layout view of a direct type backlight module according to the present invention;

FIG. 2 is a schematic diagram of a supporting pillar structure of a direct-type backlight module according to the present invention;

FIG. 3 is a cross-sectional view of a light module of a direct-type backlight module according to the present invention;

FIG. 4 is a schematic diagram of a structure layout of a backlight module according to the prior art;

in fig. 1 to 4: 100. a back plate; 200. a liquid crystal panel; 300. a light emitting module; 310. a printed circuit board; 320. an LED light bar; 330. a lens; 400. a reflective sheet; 500. a support pillar; 510. a support platform; 511. a limiting plate; 512. a bottom surface boss; 520. a support body; 530. a bolt; 600. a diffusion membrane; 700. and (5) a middle frame.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a straight following formula backlight unit, its each partial group becomes as shown in figure 1, specifically includes: a back plate 100, a liquid crystal panel 200 connected with the back plate 100, and a light emitting module 300 disposed between the back plate 100 and the liquid crystal panel 200; the light emitting module 300 includes: a plurality of light emitting modules 300 disposed on the back plate 100 and facing the liquid crystal panel 200; a reflective sheet 400 laid on the rear plate 100; the supporting columns 500 are disposed on the backplane 100 and located between adjacent light emitting modules 300, the supporting columns 500 are connected with the reflective sheet 400 in a snap-fit manner, and the supporting columns 500 are used for supporting the backplane 100 and the liquid crystal panel 200, so that the light emitting modules 300 are accommodated between the backplane 100 and the liquid crystal panel 200.

In the conventional technology, as shown in fig. 4, fig. 4 is a schematic structural arrangement diagram of a backlight module in the conventional technology, the installation of the supporting column 500 needs to be fixed by using bolts 530, during specific installation, the supporting column 500 compresses the reflector 400, and is fastened by penetrating through two bolts 530, which results in that the reflector 400 does not have a space capable of freely moving, when encountering an environment of supercooling or overheating, the reflector 400 is easy to partially bulge, which seriously affects the backlight effect of the backlight module, on the other hand, the supporting column 500 is fixed in position and can only be assembled at the position of a preset opening of the back plate 100, the installation process is tedious, and the production cost is increased.

The utility model discloses as shown in fig. 1, through being connected support column 500 and reflector plate 400 block, not form to sticis reflector plate 400 to reserve the space of the certain free activity of reflector plate 400, make reflector plate 400 can freely extend when carrying out expend with heat and contract with cold, avoid the deformation that stress produced, simultaneously, the utility model discloses support column 500 need not to use bolt 530 to assemble, guarantees backplate 100 wholeness's pleasing to the eye degree in the at utmost, has reduced the assembly flow, improves production efficiency.

When specifically implementing, as shown in fig. 2, the utility model discloses among the straight following formula backlight unit, support column 500 includes supporting platform 510 and sets up the support subject 520 in supporting platform 510 top, wherein, supporting platform 510 sets up to invert the echelonment, specifically include limiting plate 511 and the bottom surface boss 512 of setting in limiting plate 511 below, be 90 degrees contained angles between this limiting plate 511 and the bottom surface boss 512, and limiting plate 511's length and width size ratio below bottom surface boss 512's corresponding length is 2mm big at least, thereby ensure that support column 500 is when assembling with reflector plate 400, can carry on spacingly to reflector plate 400, when assembling, bottom surface boss 512 and the predetermined through-hole block of reflector plate 400, and restrict the displacement of this reflector plate 400 upper and lower direction by limiting plate 511.

Specifically, the supporting column 500 is made of PC, PMMA or a similar material, wherein the PC material is polycarbonate and has good flame retardancy, wear resistance and oxidation resistance, the PMMA material is polymethyl methacrylate, also called as acrylic or organic glass, and has high transparency and brightness, toughness and heat resistance, and meanwhile, the materials have the characteristics of light weight, good molding effect and certain rigidity, and during manufacturing, the supporting column 500 obtains stronger structural stability by adopting an injection molding integrated molding mode.

Further, the shape of the through hole preset in the reflector plate 400 is the same as that of the bottom boss 512, the size of the opening of the through hole of the reflector plate 400 refers to the size of the horizontal cross section of the bottom boss 512, and in a conventional case, 0.5mm (namely, the size of the through hole which is larger than the size of the bottom boss 512) is reserved on one side to serve as a reserved gap, so that the installation is convenient, and meanwhile, when the reflector plate 400 is in an environment with supercooling or overheating, a space with enough thermal expansion and cold contraction can be provided, so that the conditions that the reflector plate 400 is partially bulged and the like are avoided.

Specifically, when actually assembling, the reflector plate 400 is firstly laid at a preset position, the reflector plate 400 is provided with a plurality of through holes in advance, the positions corresponding to the through holes are the positions where the support columns 500 are to be installed, the adhesive is coated on the installation surface under the bottom bosses 512 of the support columns 500, the adhesive passes through the preset through holes to be adhered to the back plate 100, after the support columns 500 are adhered to the back plate 100, the lower end surface of the limiting plate 511 just contacts with the reflector plate 400, and the limiting plate 511 is larger than the corresponding side sizes of the through holes, so that the limiting plate 511 limits the reflector plate 400.

In this embodiment, as shown in fig. 3, the light emitting module 300 specifically includes a printed circuit board 310 attached to the inner side of the back plate 100, the printed circuit board 310 is provided with a circuit and a drawing on a dielectric layer, and the flow direction of current is controlled by the circuit to control the on or off of the connecting element. Still be provided with LED lamp strip 320 above this printed circuit board 310, printed circuit board 310 passes through circuit connection with LED lamp strip 320, this LED lamp strip 320 can adopt CCFL cold cathode fluorescent tube or LED emitting diode as the light emitting source, when adopting CCFL cold cathode fluorescent tube, the TV type that corresponds is the LCD TV set, when adopting LED emitting diode, the TV type that corresponds is the LED TV set, along with the continuous development of science and technology, LED lamp strip 320 still can adopt other light emitting component as the light emitting source, this application does not prescribe a limit, the replacement improvement that technical scheme made according to this application in the field all should belong to the protection scope of this application.

Further, the light emitting module 300 is further provided with a lens 330, the lens 330 is in a semicircular shape, and covers the LED light bar 320 for protecting the LED light bar 320, in this embodiment, the lens 330 is preferably made of optical glass, and the optical glass has properties of high transparency, no color, uniform texture, good refractive power, and the like, so that the efficiency of the backlight module for emitting light can be stably ensured. In other embodiments of the present application, the lens 330 may also be made of flint glass, crown glass, lanthanum crown glass, and other materials, which are added with other chemical elements to further increase the refractive index, so as to further enhance the backlight effect of the backlight module.

Further, a diffusion film 600 for scattering light is disposed under the liquid crystal panel 200, the diffusion film 600 has the same shape as the opening at the upper end of the back plate 100, four sides of the diffusion film 600 are placed at the upper edge of the back plate 100, and at the same time, the reflection sheet 400 is pressed to fix the reflection sheet 400, and the central area of the diffusion film 600 is supported by the plurality of support columns 500, thereby maintaining a stable relatively horizontal state.

Specifically, the diffusion film 200 is made of PET plastic coated with a diffusion layer on the surface thereof, and functions to uniformly diffuse the light source and refract the light emitted from the light emitting module 300 by a predetermined angle, so that the backlight module can perform a backlight function in a predetermined illumination mode.

Further, as shown in fig. 1, the liquid crystal panel 200 is disposed at an opening above the back plate 100, and forms a closed housing together with the back plate 100, the liquid crystal panel 200 is used for displaying a backlight picture, and during actual assembly, the liquid crystal panel 200 is fixed by the middle frame 700 between the liquid crystal panel 200 and the back plate 100.

Specifically, the middle frame 700 is a T-shaped ring structure, and the lower portion of the middle frame 700 is sleeved on the outer side of the back plate 100 for fastening, i.e. the inner dimension of the middle frame 700 is the same as the outer dimension of the upper edge of the back plate 100; the upper portion of center 700 is fixed through adhesive tape and liquid crystal display panel 200 to realize above-mentioned backlight unit's equipment, during the in-service use, printed circuit board 310 control LED lamp strip 320 after the power supply gives off light, and light passes through diffusion diaphragm 600 and maps on liquid crystal display panel 200, thereby realizes liquid crystal display panel 200's phenomenon.

The utility model discloses the process of actual installation as follows: place backplate 100 opening upwards on the horizontal plane, install printed circuit board 310 on the inside bottom plane of backplate 100 earlier, then pass through circuit mounting LED lamp strip 320 on the inside bottom plane of backplate 100, form luminous control banks can stabilize, again will offer the reflector plate 400 of through-hole in advance and lay on the inside bottom plane of backplate 100, specifically, reflector plate 400 is attached on printed circuit board 310's last plane, LED lamp strip 320 exposes, make light-emitting module 300 to the side scattered light can all be reflected by reflector plate 400. Further, the supporting column 500 is installed according to the position of the through hole preset in the reflector 400, an adhesive is coated on the lower installation surface of the supporting column 500, and then the supporting column vertically penetrates through the through hole of the reflector 400 downwards to be adhered and fixed with the back plate 100; then, the diffusion film 600 is placed at the upper port of the back plate 100, the reflector 400 is pressed to fix, the middle frame 700 is installed, and finally the liquid crystal panel 200 is fixed inside the middle frame 700 through the adhesive tape, thereby completing the assembly of the whole direct type backlight module.

The utility model discloses a set up the installation department of block installation in support column below, avoid using the bolt to fix again to make the casing backplate more pleasing to the eye, the installation is more simple and convenient, simultaneously, establishes the reflector plate cover around the support column, thereby can not restrict the shrinkage that rises with heat of reflector plate, avoids taking place the condition that reflector plate extrusion is bloated.

It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a straight following formula backlight unit which characterized in that, straight following formula backlight unit includes: the liquid crystal display panel comprises a back plate, a liquid crystal panel connected with the back plate and a light-emitting module arranged between the back plate and the liquid crystal panel;

2. The direct-type backlight module as claimed in claim 1, wherein the supporting posts comprise a supporting platform and a supporting body disposed on the supporting platform, and the supporting platform is engaged with the reflector.

3. The direct type backlight module according to claim 2, wherein the supporting platform is arranged in an inverted ladder shape and comprises a limiting plate and a bottom boss arranged below the limiting plate, and the bottom boss is engaged with the through hole predetermined by the reflector plate.

4. The direct type backlight module according to claim 3, wherein the through holes have the same shape as the bottom bosses, and the size of the through holes is larger than that of the bottom bosses.

5. The direct type backlight module according to claim 3, wherein the lower mounting surface of the bottom surface boss is fixed to the back plate by an adhesive.

6. The direct type backlight module according to claim 1, wherein the light emitting module comprises: the LED lamp is characterized in that the printed circuit board attached to the inner side of the back plate is in circuit connection with an LED lamp bar used for emitting light, and a lens is coated above the LED lamp bar.

7. The direct type backlight module according to claim 1, wherein a diffusion film for scattering light is disposed under the liquid crystal panel, the diffusion film is disposed between the reflection sheet and the liquid crystal panel and fixes the reflection sheet, and a central region of the diffusion film is supported by the plurality of support pillars.

8. The direct type backlight module as claimed in claim 1, wherein the liquid crystal panel is disposed at the opening above the back plate for displaying a backlight picture, and the liquid crystal panel is fixed by a middle frame disposed between the liquid crystal panel and the back plate.

9. The direct type backlight module as claimed in claim 8, wherein the middle frame is a T-shaped ring structure, the lower portion of the middle frame is disposed on the outer side of the back plate and is engaged and fixed, and the liquid crystal panel is engaged with the upper portion of the middle frame.

10. The direct type backlight module according to claim 1, wherein the supporting posts are integrally formed members made of PC or PMMA material.