CN111505864A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN111505864A CN111505864A CN202010234247.5A CN202010234247A CN111505864A CN 111505864 A CN111505864 A CN 111505864A CN 202010234247 A CN202010234247 A CN 202010234247A CN 111505864 A CN111505864 A CN 111505864A
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- Prior art keywords
- light
- backlight
- guide plate
- plate
- light source
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a backlight module and a display device, which comprise a backlight plate, and a plurality of light source assemblies and a light guide plate which are arranged on one side of the back of the backlight plate, wherein the light source assemblies are positioned between the light guide plate and the backlight plate, the light emitting surface of each light source assembly is vertical to the back of the light guide plate, a reflector is arranged on the inner side of the backlight plate, the reflector comprises a fixed section, an inclined section and a horizontal section which are sequentially connected, the fixed section is fixedly connected to the upper ends of two side edges of the backlight plate, the horizontal section is fixed on the inner wall of the backlight plate, the light source assemblies are vertically fixed on the horizontal section, two ends of the light guide plate are fixed on the fixed section, and one side. The backlight module is simple in structure, and the light emitting direction and the reflection direction of the light source are changed to eliminate the problem that part of light is difficult to irradiate the light guide plate, so that the light emitting brightness of the light guide plate is improved, the using effect of the backlight module is improved, and the light leakage phenomenon is reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a backlight module and a display device.
Background
The backlight module is one of the important components of the liquid crystal display, and because the liquid crystal does not emit light, the backlight module has the function of supplying sufficient light sources with uniform brightness and distribution, so that the liquid crystal display can normally display images. At present, the display technology of the liquid crystal display is mature, and particularly, the design of the backlight module is greatly developed, so that the optical module can be applied to liquid crystal display devices such as the liquid crystal display, the liquid crystal television and the like, and can also provide a light source for display devices such as a digital photo frame, electronic paper, a mobile phone and the like.
At present, backlight unit in the market can be roughly divided into two types of direct type backlight and side income formula backlight, side income formula backlight is to set up L ED at the side of light guide plate, turn into the area source with the line source through the light guide plate, through the light homogenization of a series of optical film with the area source L ED of direct type backlight is the matrix arrangement and sets up in order directly to form the area source under display panel, but direct type backlight and side income formula backlight all have a light-emitting surface luminance to distribute evenly inadequately, and the performance is stable inadequately, cause the phenomenon of light leak easily, reduce backlight unit's result of use.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the backlight module and the display device, which have the advantages of light leakage prevention and good use effect and can solve the problem of uneven brightness distribution of the light-emitting surface.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a backlight module, includes the board in a poor light and sets up in a plurality of light source subassemblies and the light guide plate of the back one side of board in a poor light, the light source subassembly is located between light guide plate and the board in a poor light, just the play plain noodles of light source subassembly is perpendicular with the back of light guide plate, the inboard of board in a poor light is equipped with the reflector panel, the reflector panel is including the canned paragraph, slope section and the horizontal segment that connect gradually, canned paragraph fixed connection is in the upper end on board in a poor light both sides limit, the horizontal segment is fixed on the inner wall of board in a poor light, the light source subassembly vertical fixation is on the horizontal segment, the both ends of light guide plate.
Preferably, the angle between the inclined section and the horizontal section is 120-150 degrees.
Preferably, the light source assembly comprises a light source bracket and a light source fixed on the light source bracket, the light source bracket is vertically fixed on the horizontal section, and the light source is positioned below the midpoint of the inclined section.
Preferably, a reflective film for reflecting light to the light guide plate is disposed on the back of the light source support.
As a preferred scheme, the light guide plate includes a plate body, one side of the plate body close to the reflector is a light incident surface, one side of the plate body far away from the reflector is a light emergent surface, reflectors are arranged on the left end surface and the right end surface of the plate body, and the cross section of each reflector is in a V shape.
Preferably, the optical film includes a light diffusion film, a diffusion film and a light collection prism film, the diffusion film is adhered to one side of the light guide plate away from the backlight plate, the light diffusion film is located above the diffusion film, and the light collection prism film is located between the light diffusion film and the diffusion film.
Preferably, the light-collecting prism film comprises a transverse light-collecting prism film and a longitudinal light-collecting prism film, the transverse light-collecting prism film and the longitudinal light-collecting prism film are located between the diffusion film and the diffusion film, and the transverse light-collecting prism film is located below the longitudinal light-collecting prism film.
Preferably, the fixing section is bonded to the lower surface of the light guide plate by UV glue.
According to the preferable scheme, grooves are formed in two ends of the backlight plate, springs are fixedly arranged in the grooves, one ends of the springs are connected with the bottoms of the grooves, the other ends of the springs are connected with connecting blocks, and the connecting blocks are fixedly connected with the lower surfaces of the fixing sections.
The invention also provides a display device comprising the backlight module.
Compared with the prior art, the invention has the beneficial effects that: through on the horizontal segment with light source subassembly vertical fixation at the reflector panel, make the light that the light source subassembly sent shine on the slope section, then on the reflex action of slope section down with light reflection to the light guide plate, the light guide plate is again through the diffusion diaphragm in proper order with light, light harvesting prism diaphragm and light diffusing film piece give off the outside, the light-emitting direction and the direction of reflection that adopt the change light source eliminate partial light and be difficult to shine on the light guide plate, the light-emitting brightness of light guide plate has been promoted, backlight unit's result of use has been improved, reduce the light leak phenomenon.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of a backlight module according to the present invention.
Fig. 2 is a schematic view of a reflector.
Fig. 3 is a schematic view at a in fig. 1.
Fig. 4 is a schematic view of a light guide plate.
Fig. 5 is a schematic view of an optical film.
1-a backlight plate; 2-a light source assembly; 21-a light source holder; 22-a light source; 23-a reflective film; 3-a light guide plate; 31-a plate body; 32-a reflective sheet; 33-light incident surface; 34-a light-emitting surface; 4-a reflector; 41-a fixed section; 42-an inclined section; 43-horizontal section; 5-an optical film; 51-a diffusion membrane; 52-a light-scattering film; 53-transverse light collecting prism film; 54-longitudinal light collecting prism film; 6-groove; 7-a spring; 8-connecting blocks; 9-UV glue.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
In the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, which are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-4, a backlight module includes a backlight plate 1, and a plurality of light source assemblies 2 and a light guide plate 3 disposed on one side of the back of the backlight plate 1, where the light source assemblies 2 are located between the light guide plate 3 and the backlight plate 1, and a light emitting surface of the light source assemblies 2 is perpendicular to the back of the light guide plate 3, a reflector 4 is disposed on the inner side of the backlight plate 1, the reflector 4 includes a fixing section 41, an inclined section 42 and a horizontal section 43, which are connected in sequence, the fixing section 41 is fixedly connected to the upper ends of two side edges of the backlight plate 1, the horizontal section 43 is fixed on the inner wall of the backlight plate 1, the light source assemblies 2 are vertically fixed on the horizontal section 43, two ends of the light guide plate 3 are fixed on the fixing section 41, and an optical film 5.
Preferably, the angle between the inclined section 42 and the horizontal section 43 is 120 ° to 150 °, in this embodiment, the angle between the inclined section 42 and the horizontal section 43 is preferably 145 °, when the light emitted from the light source assembly 2 irradiates the inclined section 42, and then the light is reflected onto the light guide plate 3, as proved by a lot of experiments and data, when the angle between the inclined section 42 and the horizontal section 43 is 145 °, the light reflected onto the light guide plate 3 is the largest, and light leakage of the backlight module is effectively prevented.
In one embodiment, the light source assembly 2 includes a light source support 21 and a light source 22 fixed on the light source support 21, the light source support 21 is vertically fixed on the horizontal section 43, the light source 22 is located below the midpoint of the inclined section 42, the light source support 21 is vertically fixed on the horizontal section 43, and the light source 22 is located below the midpoint of the inclined section 42, so that the light emitted by the light source 22 irradiates the inclined section 42 along the horizontal direction, and further reflects the light onto the light guide plate 3, thereby avoiding the problem that the light emitting angle of the light source makes part of the light difficult to irradiate onto the light guide plate 3, improving the light emitting brightness of the light guide plate 3, improving the use effect of the backlight module, and meanwhile, a reflective film 23 for reflecting the light onto the light guide plate 3 is arranged on the back of the light source; the light guide plate is used for reflecting light to the light guide plate 3, so that each light source support 21 is used as a reflector to reflect the light to the light guide plate 3, the uniformity of the light emitted by the light guide plate 3 is further enhanced, and the using effect of the backlight module is improved.
In one embodiment, the light guide plate 3 includes a plate body 31, a light incident surface 33 is disposed on a side of the plate body 31 close to the light reflecting plate 4, a light emergent surface 34 is disposed on a side of the plate body 31 far from the light reflecting plate, reflective sheets 32 are disposed on left and right end surfaces of the plate body 31, and a cross section of the reflective sheets 32 is V-shaped; the reflector 32 can reflect the light irradiated to the left and right end surfaces of the light guide plate 3 to the light emitting surface, so as to prevent the light from being emitted from the left and right end surfaces to cause light leakage.
In one embodiment, the optical film 5 includes a diffusion film 52, a diffusion film 51 and a light collecting prism film, the diffusion film 51 is adhered to the side of the light guide plate 3 away from the backlight 1, the diffusion film 52 is located above the diffusion film 51, and the light collecting prism film is located between the diffusion film 52 and the diffusion film 51; the light-collecting prism film comprises a transverse light-collecting prism film 53 and a longitudinal light-collecting prism film 54, the transverse light-collecting prism film 53 and the longitudinal light-collecting prism film 54 are located between the diffusion film 51 and the light-diffusing film 52, and the transverse light-collecting prism film 53 is located below the longitudinal light-collecting prism film 54.
Specifically, the fixing section 41 is bonded to the lower surface of the light guide plate 3 by UV glue 9; the UV glue 9 can be well cured without passing through a coating ultraviolet curing device and a coating baking device, so that the coating ultraviolet curing device and the coating baking device can be reduced, the backlight module is more simplified, and the cost is saved.
In one embodiment, grooves 6 are formed at two ends of the backlight plate 3, a spring 7 is fixed in each groove 6, one end of each spring 7 is connected with the bottom of each groove 6, the other end of each spring 7 is connected with a connecting block 8, and each connecting block 8 is fixedly connected with the lower surface of each fixing section 41; the arrangement of the spring 7 can buffer the light guide plate 3 and the optical film 5, and the light guide plate and the optical film are prevented from being damaged due to impact in the transportation process.
Has the advantages that: through on the horizontal segment 43 with 2 vertical fixings of light source subassembly at reflector panel 4, make the light that light source subassembly 2 sent shine on slope section 42, then on reflecting effect with light reflection to light guide plate 3 down of slope section 42 again, light guide plate 3 passes through diffusion diaphragm 51 with light in proper order again, light collection prism diaphragm and light diffusion diaphragm 52 give off the outside, the light-emitting direction and the direction of reflection that adopt the change light source eliminate partial light and be difficult to shine on light guide plate 3, the light-emitting luminance of light guide plate has been promoted, backlight unit's result of use has been improved, reduce the light leak phenomenon.
The invention also provides a display device with the backlight module. Through the optical film 5 of perpendicular fixed connection on light source subassembly 2, slope section 42 and the light guide plate 3 on the horizontal segment 43, promoted the light-emitting luminance of light guide plate 3, improved backlight unit's result of use, reduce the light leak phenomenon, let display device's display effect better.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a backlight module, includes the board in a poor light and sets up in a plurality of light source subassemblies and the light guide plate of the back one side of board in a poor light, the light source subassembly is located between light guide plate and the board in a poor light, just the play plain noodles of light source subassembly is perpendicular with the back of light guide plate, its characterized in that: the backlight module comprises a backlight plate, and is characterized in that a reflector is arranged on the inner side of the backlight plate and comprises a fixed section, an inclined section and a horizontal section which are sequentially connected, the fixed section is fixedly connected to the upper ends of two side edges of the backlight plate, the horizontal section is fixed on the inner wall of the backlight plate, a light source assembly is vertically fixed on the horizontal section, two ends of the light guide plate are fixed on the fixed section, and an optical diaphragm is arranged on one side, away from the backlight plate, of the light guide plate.
2. A backlight module according to claim 1, wherein: the angle between the inclined section and the horizontal section is 120-150 degrees.
3. A backlight module according to claim 1, wherein: the light source assembly comprises a light source support and a light source fixed on the light source support, the light source support is vertically fixed on the horizontal section, and the light source is located below the midpoint of the inclined section.
4. A backlight module according to claim 3, wherein: and a reflective film for reflecting light to the light guide plate is arranged on the back of the light source support.
5. The backlight module and the display device as claimed in claim 1, wherein: the light guide plate comprises a plate body, one side of the plate body, which is close to the reflector, is a light incident surface, one side of the plate body, which is far away from the reflector, is a light emergent surface, two left and right end surfaces of the plate body are provided with reflectors, and the cross sections of the reflectors are in a V shape.
6. A backlight module according to claim 1, wherein: the optical film comprises a light-scattering film, a diffusion film and a light-collecting prism film, the diffusion film is adhered to one side, away from the backlight plate, of the light guide plate, the light-scattering film is located above the diffusion film, and the light-collecting prism film is located between the light-scattering film and the diffusion film.
7. A backlight module according to claim 6, wherein: the light-collecting prism film comprises a transverse light-collecting prism film and a longitudinal light-collecting prism film, the transverse light-collecting prism film and the longitudinal light-collecting prism film are located between the diffusion film and the diffusion film, and the transverse light-collecting prism film is located below the longitudinal light-collecting prism film.
8. A backlight module according to claim 1, wherein: the fixed section is bonded with the lower surface of the light guide plate through UV glue.
9. A backlight module according to claim 1, wherein: the backlight plate comprises a backlight plate and is characterized in that grooves are formed in two ends of the backlight plate, springs are fixedly arranged in the grooves, one ends of the springs are connected with the bottoms of the grooves, the other ends of the springs are connected with connecting blocks, and the connecting blocks are fixedly connected with the lower surfaces of fixing sections.
10. A display device, characterized in that: comprising a backlight module as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010234247.5A CN111505864A (en) | 2020-03-30 | 2020-03-30 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010234247.5A CN111505864A (en) | 2020-03-30 | 2020-03-30 | Backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111505864A true CN111505864A (en) | 2020-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010234247.5A Pending CN111505864A (en) | 2020-03-30 | 2020-03-30 | Backlight module and display device |
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| Country | Link |
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| CN (1) | CN111505864A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542088A (en) * | 2020-11-24 | 2021-03-23 | 惠科股份有限公司 | Backlight module and display device |
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| JP2010250013A (en) * | 2009-04-14 | 2010-11-04 | Showa Denko Kk | Display device and light source device |
| CN102121630A (en) * | 2010-12-30 | 2011-07-13 | 创维液晶器件(深圳)有限公司 | Directly-lit LED backlight module and liquid crystal display |
| CN202452298U (en) * | 2012-01-19 | 2012-09-26 | 苏州东山精密制造股份有限公司 | Backlight module |
| CN102980101A (en) * | 2012-11-28 | 2013-03-20 | 京东方科技集团股份有限公司 | Backlight module and display device utilizing same |
| CN203133443U (en) * | 2013-03-28 | 2013-08-14 | 许伟岸 | Liquid crystal display |
| CN110161753A (en) * | 2019-05-31 | 2019-08-23 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
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2020
- 2020-03-30 CN CN202010234247.5A patent/CN111505864A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010250013A (en) * | 2009-04-14 | 2010-11-04 | Showa Denko Kk | Display device and light source device |
| CN102121630A (en) * | 2010-12-30 | 2011-07-13 | 创维液晶器件(深圳)有限公司 | Directly-lit LED backlight module and liquid crystal display |
| CN202452298U (en) * | 2012-01-19 | 2012-09-26 | 苏州东山精密制造股份有限公司 | Backlight module |
| CN102980101A (en) * | 2012-11-28 | 2013-03-20 | 京东方科技集团股份有限公司 | Backlight module and display device utilizing same |
| CN203133443U (en) * | 2013-03-28 | 2013-08-14 | 许伟岸 | Liquid crystal display |
| CN110161753A (en) * | 2019-05-31 | 2019-08-23 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112542088A (en) * | 2020-11-24 | 2021-03-23 | 惠科股份有限公司 | Backlight module and display device |
| CN112542088B (en) * | 2020-11-24 | 2021-11-09 | 惠科股份有限公司 | Backlight module and display device |
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Application publication date: 20200807 |