CN216927322U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN216927322U CN216927322U CN202220540950.3U CN202220540950U CN216927322U CN 216927322 U CN216927322 U CN 216927322U CN 202220540950 U CN202220540950 U CN 202220540950U CN 216927322 U CN216927322 U CN 216927322U
- Authority
- CN
- China
- Prior art keywords
- light guide
- guide plate
- plate
- backlight module
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Planar Illumination Modules (AREA)
Abstract
The utility model provides a backlight module and a display device, wherein the backlight module comprises a back frame, a light guide plate positioned in the back frame and an optical film layer positioned on the light guide plate; the back frame comprises a bottom plate and a side plate arranged along the edge of the bottom plate in a surrounding manner, and the light guide plate is positioned in the center of the side plate surrounding structure; gaps are arranged between the side plates and the edge of the light guide plate, and elastic connecting pieces are arranged in at least two opposite gaps and at least provided with end parts which are abutted against the light guide plate and the side plates; the elastic connecting piece is additionally arranged between the light guide plate and the back plate, so that the light guide plate is positioned in the middle under various conditions, the consistent elastic force borne by the light guide plate in each direction is ensured, the matching between the actual gap between the light guide plate and the back plate and the thermal expansion amount of the light guide plate is ensured, the light ripple generated by the light guide plate due to thermal expansion is avoided, and the light emitting uniformity of the side-entry backlight module is improved.
Description
Technical Field
The utility model relates to the technical field of display, in particular to a backlight module and a display device.
Background
An LCD display is a transmissive display device that adjusts light transmitted through liquid crystal according to refractive index anisotropy of liquid crystal molecules, thereby displaying a desired image on a screen. Accordingly, the LCD display includes a backlight as a light source, which provides light transmitted through the liquid crystal layer to display an image. A lamp of a general side-in type backlight module is installed at a side surface of the liquid crystal panel and supplies light to the liquid crystal layer; the lateral backlight module comprises a light source and a light guide plate, wherein the light guide plate receives light from the light source and guides the light to the display panel, and various properties of the light guide plate influence the overall display performance of the liquid crystal display device, including the material, the size, the manufacturing process and the like of the liquid crystal display device, and are also related to the installation mode and the installation result of the liquid crystal display device in the backlight device.
The light guide plate installation of side income formula backlight all adopts and sets up great clearance between light guide plate and backplate at present, can prevent that the light guide plate from producing light ripple because of the thermal expansion in the course of the work, nevertheless places the light guide plate in the reality in-process, because of the clearance existence between light guide plate and the backplate, the light guide plate appears and is partial to a certain side for a moment, and the opposite side is partial again for a moment, and the actual clearance between light guide plate and the backplate is less than the light guide plate thermal expansion volume, very easily produces light ripple, influences the homogeneity of side income formula backlight unit light-emitting.
Therefore, a new backlight module and a display device are needed to be provided to solve the problem that the light uniformity of the edge-type backlight module is affected because the light guide plate deviates to one side and the other side due to the existence of the gap between the light guide plate and the back plate, and the actual gap between the light guide plate and the back plate is smaller than the thermal expansion amount of the light guide plate, which is very easy to generate light ripples.
SUMMERY OF THE UTILITY MODEL
This application provides a backlight unit and display device according to prior art problem, can solve the side income formula backlight unit among the prior art and because of the clearance existence between light guide plate and the backplate, appear the light guide plate and be partial to certain one side for a moment, and be partial to the opposite side for a moment again, the actual clearance between light guide plate and the backplate is less than the light guide plate thermal expansion volume, very easily produces light ripple, influences the problem of the homogeneity of side income formula backlight unit light-emitting.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
the embodiment of the utility model provides a backlight module, which comprises a back frame, a light guide plate and an optical film layer, wherein the light guide plate is positioned in the back frame; the back frame comprises a bottom plate and a side plate arranged along the edge of the bottom plate in a surrounding mode, and the light guide plate is located in the center of the side plate surrounding structure.
Gaps are arranged between the side plates and the edges of the light guide plate, elastic connecting pieces are arranged in at least two opposite gaps, and the elastic connecting pieces are at least provided with end parts which are abutted against the light guide plate and the side plates.
According to an optional embodiment of the utility model, the elastic connecting piece is of an i-shaped structure, and the material of the elastic connecting piece is rubber or foam.
According to an optional embodiment of the present invention, the light guide plate has a rectangular structure, the backlight module further includes a light source assembly, the side plate is a flat plate, the light source assembly is bonded to the side plate through a heat conducting adhesive, and the light guide plate converts horizontal light emitted from the light source assembly into vertical light.
According to an optional embodiment of the present invention, in the light emitting direction of the backlight module, one end of the elastic connecting member is flush with the bottom plate, and the other end of the elastic connecting member is flush with the optical film layer.
According to an alternative embodiment of the present invention, the optical film layer includes a diffusion plate located on the light guide plate, a prism sheet located on the diffusion plate, and a brightness enhancement film located on the prism sheet.
According to an alternative embodiment of the present invention, the diffusion plate is a quantum dot film.
According to an optional embodiment of the present invention, except for one side of the light guide plate close to the light source assembly, a plurality of elastic connectors are disposed on three side surfaces of the remaining light guide plate; wherein the elastic connectors of the two symmetrical side surfaces are symmetrically arranged about a center line of the light guide plate.
According to an optional embodiment of the present invention, the light source assembly includes a driving circuit board and LED light sources arranged on the driving circuit board in an array, and the driving circuit board is a thin film transistor driving circuit.
According to an optional embodiment of the present invention, a reflective plate is further disposed between the bottom plate and the light guide plate.
According to the backlight module of the above embodiment, the present invention further provides a display device, which includes the backlight module of the above embodiment and a liquid crystal panel located on the surface of the backlight module.
The utility model has the beneficial effects that: the embodiment of the utility model provides a backlight module and a display device, wherein the backlight module comprises a back frame, a light guide plate positioned in the back frame and an optical film layer positioned on the light guide plate; the back frame comprises a bottom plate and a side plate arranged along the edge of the bottom plate in a surrounding manner, and the light guide plate is positioned in the center of the side plate surrounding structure; gaps are arranged between the side plates and the edge of the light guide plate, and elastic connecting pieces are arranged in at least two opposite gaps and at least provided with end parts which are abutted against the light guide plate and the side plates; the elastic connecting piece is additionally arranged between the light guide plate and the back plate, so that the light guide plate is positioned in the middle under various conditions, the consistency of the elastic force borne by the light guide plate in all directions is ensured, the matching of the actual gap between the light guide plate and the back plate and the thermal expansion amount of the light guide plate is ensured, the light ripples generated by the light guide plate due to thermal expansion are avoided, and the light emitting uniformity of the side-entry backlight module is improved.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the utility model, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic top view of a backlight module according to the present invention.
FIG. 2 is a schematic cross-sectional view A1-A2 of FIG. 1.
FIG. 3 is a schematic cross-sectional view of B1-B2 shown in FIG. 2.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the utility model may be practiced. The directional terms used in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals, and broken lines in the drawings indicate that the elements do not exist in the structures, and only the shapes and positions of the structures are explained.
The utility model aims at the problem that the side-in type backlight module in the prior art has the technical defects that the light guide plate deviates to one side and the other side at a moment due to the existence of the gap between the light guide plate and the back plate, the actual gap between the light guide plate and the back plate is smaller than the thermal expansion amount of the light guide plate, light ripples are easily generated, and the uniformity of light emitting of the side-in type backlight module is influenced.
In order to solve the above technical problems, an embodiment of the present invention provides a backlight module, which includes a back frame, a light guide plate located in the back frame, and an optical film layer located on the light guide plate; the back frame comprises a bottom plate and a side plate arranged along the edge of the bottom plate in a surrounding manner, and the light guide plate is positioned in the center of the side plate surrounding structure; gaps are arranged between the side plates and the edge of the light guide plate, and elastic connecting pieces are arranged in at least two opposite gaps and at least provided with end parts which are abutted against the light guide plate and the side plates; the elastic connecting piece is additionally arranged between the light guide plate and the back plate, so that the light guide plate is positioned in the middle under various conditions, the consistency of the elastic force borne by the light guide plate in all directions is ensured, the matching of the actual gap between the light guide plate and the back plate and the thermal expansion amount of the light guide plate is ensured, the light ripple generated by the light guide plate due to the thermal expansion is avoided, and the light emitting uniformity of the side-entry backlight module is improved.
Specifically, as shown in fig. 1, the back frame 101 of the backlight module 100 includes a bottom plate 1011 and side plates, such as a side plate 1012, a side plate 1013, a side plate 1014 and a side plate 1015, bent along edges of the bottom plate 1011, the bottom plate 1011 is provided with the light guide plate 102, and the light guide plate 102 is located at a central position of a structure enclosed by the side plate 1012, the side plate 1013, the side plate 1014 and the side plate 1015. Gaps are arranged between the side plates and the edge of the light guide plate, and elastic connecting pieces are arranged in at least two opposite gaps and at least provided with end parts which are abutted against the light guide plate and the side plates; gaps are provided between the side plates 1012, 1013, 1014, 1015 and the light guide plate 102. The utility model clamps an elastic connecting piece in the gap; the elastic connecting piece enables the light guide plate to be in the center under various conditions, so that the elastic force applied to each direction of the light guide plate is consistent, the actual gap between the light guide plate and the back plate is matched with the thermal expansion amount of the light guide plate, light ripples generated on the light guide plate due to thermal expansion are avoided, and the light emitting uniformity of the lateral entrance type backlight module is improved.
In this embodiment, the elastic connection members 1041 and 1042 are disposed between the side plate 1012 and the light guide plate 102, the elastic connection members 1043 and 1044 are disposed between the side plate 1013 and the light guide plate 102, and the elastic connection members 1045 and 1046 are disposed between the side plate 1014 and the light guide plate 102; all of this embodiment elastic connecting piece is the I shape structure, elastic connecting piece's material is rubber or bubble cotton, and wherein, all elastic connecting piece's material, the size is all unanimous to guarantee that the all directions of light guide plate receive the elastic force unanimously.
The light guide plate 102 in this embodiment has a rectangular structure, the backlight module 100 further includes a light source assembly 103, and a plurality of elastic connectors are disposed on three sides of the remaining light guide plate 102 except for a side of the light guide plate 102 close to the light source assembly 103; the elastic connectors of the two symmetrical sides are symmetrically disposed about a center line of the light guide plate, for example, the elastic connector 1042 and the elastic connector 1045 are symmetrically disposed about a longitudinal center line of the light guide plate, and the elastic connector 1041 and the elastic connector 1046 are symmetrically disposed about the longitudinal center line of the light guide plate.
The light source assembly 103 includes a driving circuit board 1031 and LED light sources 1032 arranged on the driving circuit board 1031 in an array, and the driving circuit board 1031 is preferably a thin film transistor driving circuit. The side plate 1015 is a flat plate, the light source assembly 103 is adhered to the side plate 1015 through a heat conducting adhesive, and the light guide plate 102 converts horizontal light rays emitted by the light source assembly 103 into vertical light rays.
The following are noted: FIG. 2 is a schematic cross-sectional view taken along line A1-A2 in FIG. 1, and FIG. 3 is a schematic cross-sectional view taken along line B1-B2 in FIG. 1; in order to show the film layer schematic diagram of the whole display device, the liquid crystal panel film layer and the position schematic diagram of the placement are added in fig. 2 and fig. 3, but the structural description of the backlight module is not affected.
FIG. 2 is a film layer schematic diagram of section A1-A2 of the backlight module 100, which includes a back frame including a bottom plate 1011 and side plates 1011 forming an accommodating cavity, wherein the side plates of the present embodiment include side plates 1012 and 1014; a reflective plate 105 is disposed on the bottom plate 1011, a light guide plate 102 is disposed on the reflective plate 105, and an optical film layer including a diffusion plate 1061, a prism sheet 1062 and a brightness enhancement film 1063 is disposed above the light guide plate 102. An elastic connector 1041 is arranged between the side plate 1012 and the light guide plate 102, and an elastic connector 1046 is arranged between the side plate 1014 and the light guide plate 102.
In backlight unit light-emitting direction, elastic connection spare 1041 and elastic connection spare 1046 one end flush with bottom plate 1011, the other end flushes with the optics rete, be convenient for further make the light guide plate position placed in the middle, because of the even outside inflation of elastic force effect during the thermal expansion, wherein, all elastic connection spare's material, the size is all unanimous, in order to guarantee that the elastic force that the light guide plate all directions received is unanimous, avoid the actual clearance between light guide plate and the backplate to be less than the light guide plate thermal expansion volume, very easily produce the condition of light ripple, thereby improve the homogeneity of side income formula backlight unit light-emitting.
The backlight module in the embodiment further comprises a middle frame and a top cover, and the middle frame and the top cover are used for fixing a liquid crystal panel above the backlight module, and the liquid crystal panel comprises an array substrate 201, a color film substrate 203 and a liquid crystal layer 202 located between the array substrate 201 and the color film substrate 203; such as a left side center box 1071, a right side center box 1072, a left side top cover 1081, and a right side top cover 1082.
FIG. 3 is a schematic diagram of a film layer of a section B1-B2 of the backlight module 100 shown in FIG. 1, the backlight module includes: the back frame comprises a bottom plate 1011 and side plates, wherein the bottom plate 1011 and the side plates form an accommodating cavity, and the side plates of the embodiment comprise side plates 1015 and side plates 1016; a reflection plate 105 located above the bottom plate 1011 for reflecting light leaking from the containing chamber back again; a light guide plate 102; the light source assembly 103, one side of the light guide plate 102 close to the light source assembly 103 is provided with a notch avoiding the light source assembly, the side plate 1015 is a flat plate, the light source assembly 103 is adhered to the side plate 1015 through heat conducting glue, and the light guide plate 102 converts horizontal light emitted by the light source assembly into vertical light; an optical film layer including a diffusion plate 1061, a prism sheet 1062, and a brightness enhancement film 1063; the diffusion plate 1061 is used to convert incident light from the light guide plate 102 into a surface light source by multiple refraction, reflection, and scattering, so as to sufficiently scatter the incident light, thereby making the light source softer and more uniform. The prism sheet 1062 and the brightness enhancement film 1063 are used for collecting the divergent light emitted by the diffusion plate 1061 in a preset range and emitting the divergent light, and improving the brightness of the backlight module; the diffusion plate 1061 in this embodiment is preferably a quantum dot film. The prism sheet 1062 is preferably a light condensing device, and concentrates the dispersed light to exit within a certain angle range by using the law of total reflection and refraction, thereby improving the brightness within the exit range and the brightness of the backlight module. The backlight module in the embodiment further comprises a middle frame and a top cover, and the middle frame and the top cover are used for fixing a liquid crystal panel above the backlight module, and the liquid crystal panel comprises an array substrate 201, a color film substrate 203 and a liquid crystal layer 202 located between the array substrate 201 and the color film substrate 203; such as a left side center box 1071, a right side center box 1072, a left side top cover 1081, and a right side top cover 1082.
According to the backlight module of the above embodiment, the present invention further provides a display device, which includes the backlight module of the above embodiment, a liquid crystal panel located on the surface of the backlight module, and a protective cover plate located on the surface of the liquid crystal panel, wherein an annular middle frame is disposed on one side of the backlight module and the liquid crystal panel, an annular top cover is disposed on the opposite side of the backlight module and the liquid crystal panel, and the annular middle frame and the annular top cover are used for fixing the liquid crystal panel. Referring to fig. 2 and 3, the liquid crystal panel includes an array substrate 201, a color filter substrate 203, and a liquid crystal layer 202 located between the array substrate 201 and the color filter substrate 203, in the film cross-sectional structure, the middle frame includes a right middle frame and a left middle frame, and the top cover includes a right top cover and a left top cover.
Through the improvement of the structure, the utility model can only increase the elastic connecting piece in the gap between the light guide plate and the back plate on the premise of ensuring that the whole structure of the backlight module is not influenced, so that the light guide plate is positioned in the middle position under various conditions by the elastic connecting piece to ensure that the elastic force borne by the light guide plate in each direction is consistent, the actual gap between the light guide plate and the back plate is matched with the thermal expansion amount of the light guide plate, and the light ripple generated by the light guide plate due to thermal expansion is avoided, thereby improving the uniformity of the light emitted by the lateral-in backlight module.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A backlight module is characterized by comprising a back frame, a light guide plate positioned in the back frame and an optical film layer positioned on the light guide plate; the back frame comprises a bottom plate and a side plate arranged along the edge of the bottom plate in a surrounding manner, and the light guide plate is positioned in the center of the side plate surrounding structure;
gaps are arranged between the side plates and the edges of the light guide plate, elastic connecting pieces are arranged in at least two opposite gaps, and the elastic connecting pieces are at least provided with end parts which are abutted against the light guide plate and the side plates.
2. The backlight module as claimed in claim 1, wherein the elastic connecting member is an i-shaped structure, and the elastic connecting member is made of rubber or foam.
3. The backlight module as claimed in claim 1, wherein the light guide plate has a rectangular structure, the backlight module further comprises a light source assembly, the side plate is a flat plate, the light source assembly is bonded to the side plate via a heat-conducting adhesive, and the light guide plate converts horizontal light emitted from the light source assembly into vertical light.
4. The backlight module according to claim 1, wherein one end of the elastic connecting member is flush with the bottom plate and the other end is flush with the optical film layer in the light emitting direction of the backlight module.
5. The backlight module as claimed in claim 3, wherein the optical film layer comprises a diffuser plate on the light guide plate, a prism sheet on the diffuser plate, and a brightness enhancement film on the prism sheet.
6. The backlight module according to claim 5, wherein the diffuser plate is a quantum dot film.
7. The backlight module as claimed in claim 3, wherein a plurality of the elastic connectors are disposed on three sides of the light guide plate except for a side of the light guide plate adjacent to the light source module; wherein the elastic connectors of the two symmetrical side surfaces are symmetrically arranged about a center line of the light guide plate.
8. The backlight module as claimed in claim 3, wherein the light source assembly comprises a driving circuit board and an array of LED light sources disposed on the driving circuit board, and the driving circuit board is a thin film transistor driving circuit.
9. The backlight module as claimed in claim 1, wherein a reflective plate is further disposed between the bottom plate and the light guide plate.
10. A display device comprising the backlight module according to any one of claims 1 to 9 and a liquid crystal panel disposed on a surface of the backlight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220540950.3U CN216927322U (en) | 2022-03-11 | 2022-03-11 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220540950.3U CN216927322U (en) | 2022-03-11 | 2022-03-11 | Backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216927322U true CN216927322U (en) | 2022-07-08 |
Family
ID=82226190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220540950.3U Active CN216927322U (en) | 2022-03-11 | 2022-03-11 | Backlight module and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216927322U (en) |
-
2022
- 2022-03-11 CN CN202220540950.3U patent/CN216927322U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109765720B (en) | Liquid crystal display device having a plurality of pixel electrodes | |
| TWI484250B (en) | Front light module | |
| KR100903028B1 (en) | LGP for backlight unit of liquid crystal display including wedge back prism | |
| US8029180B2 (en) | Light unit, backlight, frontlight, and display device | |
| TWI804139B (en) | Display device | |
| KR101777535B1 (en) | Installation structure of optical film set | |
| US20100053502A1 (en) | Prism sheet and liquid crystal display having the same | |
| WO2009142226A1 (en) | Illumination device and display device | |
| US20110109836A1 (en) | Illumination device and liquid crystal display device | |
| KR20090123747A (en) | Optical sheet, backlight unit and liquid crystal display including the same | |
| KR100838322B1 (en) | Light guide plate for backlight unit of liquid crystal display device having asymmetric front prism | |
| WO2019200818A1 (en) | Liquid crystal display apparatus | |
| JP4374365B2 (en) | Backlight unit of liquid crystal display device | |
| KR101287642B1 (en) | Optical sheet, backlight unit and liquid crystal display device having the same | |
| KR101415683B1 (en) | Liquid crystal display device | |
| CN216622917U (en) | Backlight module and display device | |
| KR101540216B1 (en) | Optical element and display device including the same | |
| KR20140026187A (en) | Liquid crystal display device having minimized bezzel | |
| JPH11295713A (en) | Liquid crystal display | |
| CN205028004U (en) | Backlight module and display device | |
| CN216927322U (en) | Backlight module and display device | |
| WO2018145325A1 (en) | Backlight assembly and liquid crystal display module | |
| KR101649219B1 (en) | Liquid crystal display device | |
| KR20120130919A (en) | Backlgiht unit and liquid crystal display device the same | |
| KR101931192B1 (en) | Backlight assembly, liquid crystal display device having the same, and method of manufacturing the backlight assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |