CN115167036A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN115167036A CN115167036A CN202211092691.3A CN202211092691A CN115167036A CN 115167036 A CN115167036 A CN 115167036A CN 202211092691 A CN202211092691 A CN 202211092691A CN 115167036 A CN115167036 A CN 115167036A
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- light
- light guide
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- guide plate
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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
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- 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
Abstract
The application discloses a backlight module and a display device, wherein the backlight module comprises a back plate, a light guide plate, an optical diaphragm, a light bar fixing plate and at least two light bars, wherein the back plate is divided into a frame area and a middle area surrounded by the frame area; the light guide plate is arranged on the back plate and comprises a light inlet side and a light outlet side; the optical diaphragm is arranged on the light emitting side of the light guide plate, the middle area of the back plate is provided with a hollow part, and the light bar fixing plate is arranged at the hollow part of the back plate and connected with the back plate; the two light bars are fixed on the light bar fixing plate, the light emitting surfaces of the two light bars are arranged in a manner of deviating from each other, and the light emitting surfaces of the light bars are perpendicular to the light emitting side of the light guide plate; light generated by the two light bars enters the light guide plate through the light inlet side and is emitted from the light outlet side of the light guide plate. The backlight module is favorable for the ultrathin design of four sides of the display device, and is convenient for the narrow frame and the thinning of the display device.
Description
Technical Field
The application relates to the technical field of liquid crystal display, in particular to a backlight module and a display device.
Background
In the existing lateral type display in the market, due to the wiring and heat dissipation requirements of the lateral type light bar in the backlight assembly, the basic thickness of the backlight assembly cannot be compressed, and the backlight assembly is often arranged on one side of the display, so that the display adopting the scheme can only realize the design of three-edge ultra-thin, one side provided with the backlight assembly is very thick and heavy, and the narrow frame and the thinning of the display device are influenced.
Disclosure of Invention
The utility model provides a backlight module and display device is provided, is favorable to the ultra-thin design of display device's four sides, the narrow frame and the slimming of display device of being convenient for.
The application discloses a backlight module, which comprises a back plate, a light guide plate, an optical diaphragm, a light bar fixing plate and at least two light bars, wherein the back plate is divided into a frame area and a middle area surrounded by the frame area; the light guide plate is arranged on the back plate and comprises a light inlet side and a light outlet side; the optical film is arranged on the light emitting side of the light guide plate, a hollow part is arranged in the middle area of the back plate, and the light bar fixing plate is arranged in the hollow part of the back plate and connected with the back plate; the two light bars are fixed on the light bar fixing plate, the light emitting surfaces of the two light bars are arranged in a manner of deviating from each other, and the light emitting surfaces of the light bars are perpendicular to the light emitting side of the light guide plate; and light rays generated by the two light bars enter the light guide plate through the light inlet side and are emitted from the light outlet side of the light guide plate.
Optionally, the backlight module further includes an auxiliary light bar, the light bar fixing plate includes a connecting plate and a fixing portion, the fixing portion protrudes from the connecting plate, the connecting plate is connected to the back plate, the two light bars are respectively disposed on two opposite sides of the fixing portion, and the auxiliary light bar is disposed on one side of the fixing portion away from the connecting plate; the light emitting surface of the auxiliary light bar is perpendicular to the light emitting surface of the light bar and is parallel to the light emitting side of the light guide plate.
Optionally, the backlight module further includes light guide columns, the number of the light guide columns is equal to the number of the light bars, the light guide columns are fixedly connected to the connecting plate, light guide channels are disposed on the light guide columns, each light guide channel includes a light entrance end and a light exit end, the light entrance end is located at a light exit surface of the light bar, and the light exit end is located at a light entrance side of the light guide plate; the light generated by the light bar enters the light guide channel through the light inlet end and is emitted from the light outlet end to enter the light guide plate.
Optionally, a light reflecting coating is arranged on the light guide channel, light generated by the light bar enters the light guide channel through the light inlet end, and is reflected by the light reflecting coating in the light guide channel and then is emitted from the light outlet end to enter the light guide plate.
Optionally, the backlight module further includes a first reflective sheet, a second reflective sheet, and a half mirror, where the first reflective sheet is located on one side of the light guide plate close to the back plate, and reflects light entering the light guide plate; the number of the second reflection sheets is two, and the two second reflection sheets are respectively arranged on two sides of the auxiliary light bar; the half mirror is arranged at one end, far away from the fixing part, of the auxiliary light bar, one half of light generated by the auxiliary light bar is reflected by the half mirror, and the other half of light penetrates through the half mirror to be emitted; wherein the second reflection sheet reflects the light reflected by the half mirror.
Optionally, a distance between the light bar and the optical diaphragm is greater than a distance between the light guide plate and the optical diaphragm, the light guide channel includes a first channel, a second channel, and a third channel, and the second channel is connected to the first channel and the third channel; the light-entering end is located in the first channel, the light-emitting end is located in the third channel, a first horizontal plane is arranged on the third channel and is close to the optical diaphragm, and the first horizontal plane is perpendicular to the light-emitting end.
Optionally, a mesh surface is arranged on the first horizontal plane, one end of the mesh surface is abutted to the light incident side of the light guide plate, the other end of the mesh surface is abutted to the second reflector plate, and the mesh surface comprises a plurality of light shading strips which are arranged at intervals.
Optionally, two mounting protrusions are arranged on one side, away from the connecting plate, of the fixing portion, the two mounting protrusions are located on two sides of the auxiliary light bar respectively, one end of the second reflector located on one side of the auxiliary light bar is abutted to the mounting protrusion located on the same side of the auxiliary light bar, the other end of the second reflector is abutted to one end, close to the auxiliary light bar, of the first horizontal plane on the light guide column located on the same side of the auxiliary light bar, and the two second reflectors are symmetrically arranged relative to the auxiliary light bar.
Optionally, the backlight module further includes a fixing screw, a first connecting hole is formed in a middle region of the back plate, a second connecting hole is formed in the connecting plate, and the fixing screw penetrates through the second connecting hole and is in threaded connection with the first connecting hole to connect the back plate and the light bar fixing plate; wherein the connecting plate is located on one side of the back plate away from the optical film.
The application also discloses a display device, display device includes display panel, backshell and as above backlight unit, be equipped with the heat dissipation region on the backshell, the heat dissipation region with the position coincidence of the middle zone of backplate.
For the scheme of current side income formula display, this application provides light for backlight unit through two lamp strips, a lamp strip only needs to provide light for half backlight unit, the service strength of lamp strip has been reduced to a certain extent, prolong backlight unit's life, and simultaneously, set up two lamp strips at the middle part of backplate, thereby compare in current side income formula display, the ultra-thin design of four sides can be realized to the display that adopts this application scheme, be convenient for display device's narrow frame and slimming.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic structural diagram of a display device according to a first embodiment of the present application;
fig. 2 is a schematic structural diagram of another view angle of a display device according to a first embodiment of the present application;
fig. 3 is a sectional view of a backlight module according to a first embodiment of the present application;
fig. 4 is a sectional view of a backlight module according to a second embodiment of the present application;
FIG. 5 is a schematic view of a second embodiment of the present disclosure, showing a light bar fixing plate, a light guide post, a light bar, an auxiliary light bar, and a half mirror;
FIG. 6 is a schematic structural diagram of a light guide bar according to a second embodiment of the present application;
fig. 7 is a sectional view schematically showing a display device according to a third embodiment of the present application;
fig. 8 is a schematic view of a light path of a display device according to a third embodiment of the present application.
100, a back plate; 110. a first connection hole; 200. a light guide plate; 210. a light incident side; 220. a light emitting side; 300. an optical film; 400. a rubber frame; 500. a light bar fixing plate; 510. a connecting plate; 511. a second connection hole; 520. a fixed part; 521. mounting a boss; 600. a light bar; 700. an auxiliary light bar; 800. a light guide pillar; 810. a light guide channel; 811. a light input end; 812. a light emitting end; 813. a light-reflecting coating; 814. a first channel; 815. a second channel; 816. a third channel; 817. a first horizontal plane; 818. a mesh point surface; 900. a first reflective sheet; 910. a second reflective sheet; 920. a half mirror; 930. a set screw; 1000. a backlight module; 2000. a display panel; 3000. a rear housing; 4000. a display device.
Detailed Description
It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless stated otherwise, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.
Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application.
Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The present application will now be described in detail with reference to the drawings and alternative embodiments, it being understood that any combination of the various embodiments or technical features described below may form new embodiments without conflict.
Fig. 1 is a schematic structural diagram of a display device according to a first embodiment of the present application, fig. 2 is a schematic structural diagram of another viewing angle of the display device according to the first embodiment of the present application, fig. 3 is a schematic sectional structural diagram of a backlight module according to the first embodiment of the present application, an x-axis direction in the diagram is a top side of a conventional display panel, and an-x-axis direction in the diagram is a bottom side of the conventional display panel, as shown in fig. 3, a backlight module 1000 is disclosed as a first embodiment of the present application, the backlight module 1000 is installed in a display device 4000, the display device 4000 is shown in fig. 1 and fig. 2, the backlight module 1000 includes a back plate 100, a light guide plate 200, an optical film 300, a plastic frame 400, a light bar fixing plate 500, and at least two light bars 600, the back plate 100 is divided into a border area and a middle area surrounded by the border area, the light guide plate 200 is disposed on the rear panel 100, the light guide plate 200 includes a light incident side 210 and a light emergent side 220, the optical film 300 is disposed on the light emergent side 220 of the light guide plate 200, the adhesive frame 400 is disposed outside the frame area and is used for supporting a display panel, a hollow portion is disposed in a middle area of the rear panel 100, the light bar fixing plate 500 is disposed in the hollow portion of the rear panel 100 and is connected to the rear panel 100, the two light bars 600 are fixed on the light bar fixing plate 500, light emergent surfaces of the two light bars 600 are away from each other, the light emergent surface of the light bars 600 is perpendicular to the light emergent side 220 of the light guide plate 200, light generated by the two light bars 600 enters the light guide plate 200 through the light incident side 210 and is emitted from the light emergent side 220 of the light guide plate 200, so as to realize the function of the backlight module 1000 providing light, in this embodiment, the distance between the two light bars 600 is greater than or equal to 0, so that the phenomenon that the light provided by the backlight module 1000 in the area is weak due to overlarge interval between the two light bars 600 and the display effect is affected due to the obvious brightness difference between the light and the light in other areas is avoided.
The backlight module 1000 of this embodiment, set up two lamp strips 600 on lamp strip fixed plate 500, lamp strip fixed plate 500 is connected with the middle zone of backplate 100 again, make two lamp strips 600 be located the middle part of backplate 100, and the play plain noodles of two lamp strips 600 set up for deviating from each other, thus, a lamp strip 600 can provide light for half backlight module 1000, two lamp strips 600 just can provide the required light of whole backlight module 1000, for current scheme of side income formula backlight module 1000, lamp strip 600 quantity sets up to two, the use strength of lamp strip 600 has been reduced to a certain extent, prolong backlight module 1000's life, and set up two lamp strips 600 in the middle part of backplate 100, make the display device that has this backlight module 1000 realize the ultra-thin design of four sides, compare the thickness of backlight module 1000 of this embodiment with current display device that possesses straight following formula backlight module 1000, and compare with current display device that possesses side income formula backlight module 1000, this embodiment has the differentiation characteristic, can attract more on the market, and the ultra-thin design of display device's of the display device 1000 that possesses this embodiment can realize, be convenient for display device's narrow frame and thin design of four sides.
Fig. 4 is a sectional structure diagram of a backlight module according to a second embodiment of the present application, fig. 5 is a structure diagram of a light bar fixing plate, a light guide pillar, a light bar, an auxiliary light bar, and a half mirror according to the second embodiment of the present application, fig. 6 is a structure diagram of a light guide pillar according to the second embodiment of the present application, an x-axis direction in the drawing is a top side in a conventional display panel, and an x-axis direction in the drawing is a ground side in a conventional display panel, as shown in fig. 4 to 6, as a second embodiment of the present application, it is an improvement of the first embodiment of the present application, a backlight module 1000 is disclosed, the backlight module 1000 further includes an auxiliary light bar 700, the light bar fixing plate 500 includes a connecting plate 510 and a fixing portion 520, the fixing portion 520 protrudes from the connecting plate 510, the connecting plate 510 is connected to the back plate 100, two light bars 600 are respectively disposed on two opposite sides of the fixing portion 520, the auxiliary light bar 700 is disposed on a side of the fixing portion 520 away from the connecting plate 510, a light-emitting surface of the auxiliary light bar 700 is perpendicular to a light-emitting surface of the light bars 600 and is parallel to the light-emitting side 220 of the light guide plate 200, in this embodiment, the auxiliary light bar 700 provides light for an area between the two light bars 600, light required by the backlight module 1000 is provided by the two light bars 600 and the auxiliary light bar 700, and the brightness of the auxiliary light bar 700 is lower than that of the two light bars 600, so that the light intensity of the area between the two light bars 600 is approximately the same as that of other areas of the backlight module 1000, thereby preventing the display device using the backlight module 1000 from displaying non-uniform brightness, and in general, the auxiliary light bar 700 is used to provide light for an interval area between the two light bars 600, the uneven display brightness caused by uneven intensity of light rays emitted from the backlight module 1000 is avoided, and if the interval area between the two light bars 600 is small, the difference of the intensity of the light rays emitted from the backlight module 1000 is not obvious, and the auxiliary light bars 700 are not needed;
in addition, in this embodiment, the light bar fixing plate 500 is an aluminum substrate, the two light bars 600 are bonded to the fixing portion 520 through a heat conducting adhesive, the auxiliary light bar 700 is bonded to the fixing portion 520 through a heat conducting adhesive, and heat generated by the light bars 600 and the auxiliary light bar 700 during operation is transferred to the light bar fixing plate 500 through the heat conducting adhesive, so that the heat is concentrated on the light bar fixing plate 500, that is, most of the heat in the backlight module 1000 is concentrated in the middle of the back plate 100.
In the design process, the inventor considers that the light bar 600 directly emits the light to the light incident side 210 of the light guide plate 200, if the light bar 600 directly abuts against the light guide plate 200, the heat generated by the operation of the light bar 600 may directly affect the light guide plate 200, so that the using effect of the light guide plate 200 is not good, and if the light bar 600 and the light guide plate 200 are arranged at intervals, the emitted light may be lost to a certain extent before entering the light guide plate 200, so as to increase the intensity used by the light bar 600, in summary, the backlight module 1000 further includes the light guide posts 800, the number of the light guide posts 800 is equal to the number of the light bars 600, the light guide posts 800 are fixedly connected with the connecting plate 510, the light guide channel 810 is arranged on the light guide post 800, the light guide channel 810 includes a light incident end 811 and a light exit end 812, the light incident end 811 is located at the light exit surface of the light bar 600, the light exit end 812 is located at the light entrance side 210 of the light guide plate 200, so that light generated by the light bar 600 enters through the light entrance end 811 of the light guide channel 810 and exits from the light exit end 812 of the light guide channel 810 into the light guide plate 200, in this process, loss of the light generated by the light bar 600 before entering the light guide plate 200 is reduced through the guiding effect of the light guide channel 810, meanwhile, a reflective coating 813 is arranged on the light guide channel 810, the light generated by the light bar 600 enters through the light entrance end 811 of the light guide channel 810, after being reflected by the reflective coating 813 in the light guide channel 810, the light exits from the light exit end 812 of the light guide channel 810 into the light guide plate 200, the light can be mixed and reflected to a certain degree in the light guide channel 810, so that the light can be better dispersed when entering the light guide plate 200, and the reflective coating 813 is arranged in the light guide channel 810, the loss that light appears in light guide channel 810 has been reduced, in this embodiment, light guide column 800 passes through the double faced adhesive tape with connecting plate 510 fixed connection, light guide channel 810's income light end 811 is close to lamp strip 600 sets up, light guide channel 810's play light end 812 is close to light guide plate 200 sets up, light guide channel 810 is made by transparent substrate, transparent substrate can be polycarbonate PC, MS or organic glass PMMA.
In order to make the light provided by the backlight module 1000 more uniform and reduce the loss of the light generated by the light bar 600, the backlight module 1000 further includes a first reflector 900, a second reflector 910 and a half mirror 920, the first reflector 900 is located on one side of the light guide plate 200 close to the back plate 100, when the light generated by the light bar 600 enters the light incident side 210 of the light guide plate 200 through the guide of the light guide pillar 800, the light is mixed and diffused in the light guide plate 200, the light diffused in the direction away from the optical film 300 is reflected by the first reflector 900, so that the direction of the light is reversed or shifted, and most of the light entering the light guide plate 200 can be emitted from the light emitting side 220 of the light guide plate 200, so as to provide the light for the display device; half mirror 920 sets up auxiliary light bar 700 keeps away from the one end of fixed part 520, half light that auxiliary light bar 700 produced can pass half mirror 920 continues to penetrate, and half can be through half mirror 920 reflects for light direction reversal or skew, at this moment, second reflector 910 is provided with two, and sets up respectively auxiliary light bar 700's both sides, and the warp light that half mirror 920 reflects can with two second reflector 910 contact for light jets out towards optical diaphragm 300 direction, through setting up first reflector 900, second reflector 910 and half mirror 920, makes backlight module 1000 provides light and can evenly illuminate whole display panel 2000, wherein, in this embodiment, half mirror 920 with interval sets up between auxiliary light bar 700, so that the light that auxiliary light bar 700 produced, before passing half mirror 920 or being reflected by half mirror 920, possesses certain mixed light distance, makes the light intensity that auxiliary light bar 700 jets out even.
In this embodiment, the light guide plate 200 and the light bar 600 of the backlight module 1000 are not located on the same horizontal plane, as shown in fig. 4, a distance between the light bar 600 and the optical film 300 is greater than a distance between the light guide plate 200 and the optical film 300, the light guide channel 810 includes a first channel 814, a second channel 815 and a third channel 816, the second channel 815 connects the first channel 814 and the third channel 816, the light entrance end 811 is located in the first channel 814, the light exit end 812 is located in the third channel 816, a first horizontal plane 817 is disposed on the third channel 816, the first horizontal plane 817 is disposed near the optical film 300, the first horizontal plane 817 and the light exit end 812 are disposed vertically, so that the first horizontal plane 817 and the light guide plate 200 of the pillar 800 can support the optical film 300, the first channel 814 and the third channel 816 are disposed horizontally, and the first channel 814 and the third channel 816 are disposed in parallel, so that when entering the first channel 814 and the light guide plate 200 through the light entrance end 811, most of the light rays entering the first channel 814 and the second channel 815 are incident light guide plate 200, and most of the light rays entering the second channel 815 are condensed into the light guide plate as the third channel 815, and the light guide light bar 200, and the light exit channel 815 are condensed in parallel to the third channel 814, and the light guide light bar 200, and the light rays entering the light guide plate 210, and the light guide plate, and the light rays entering the third light guide plate, and the light bar 200 are condensed in parallel, and the third light guide light exit end 815 is further, and the light guide plate, and the light guide plate 210, the second channel 815 may be an inclined channel as shown in fig. 6, or may be a vertical channel, which is not limited herein, and a designer may design the shape of the conducting channel according to actual requirements.
Since the first horizontal plane 817 is in direct contact with the optical film 300, so that the light guide pillar 800 can support the optical film 300, and at this time, the light provided by the position of the first horizontal plane 817 is only the light scattered from the light guide channel 810, and the light intensity is not equal to the light intensity provided by the auxiliary light bar 700 and the light intensity provided by the light guide plate 200, which may result in brighter or darker light provided by the position of the first horizontal plane 817, it is contemplated that a mesh point surface 818 is disposed on the first horizontal plane 817 of the light guide channel 810, the mesh point surface 818 is just located in a gap between the first reflector 900 and the second reflector 910, that is, between an area range that the light guide plate 200 can illuminate and an area range that the auxiliary light bar 700 can illuminate, one end of the mesh point surface 818 abuts against the light incident side 210 of the light guide plate 200, the other end of the mesh point surface 818 abuts against the second reflector 910, the mesh point surface 818 includes a plurality of light bars, the plurality of the light bars are disposed at intervals, when the backlight module 1000 is assembled, a worker may adjust the light intensity of the light rays provided by the first horizontal plane 817 and the light intensity of the light bars 817 around the light bar 817, and control the distance between the light bars 818, so that the light intensity of the light bars 818 is controlled by the light intensity of the light bars 818.
As shown in fig. 5, two mounting protrusions 521 are disposed on a side of the fixing portion 520 away from the connecting plate 510, the two mounting protrusions 521 are respectively disposed on two sides of the auxiliary light bar 700, one end of the second reflective sheet 910 on one side of the auxiliary light bar 700 abuts against the mounting protrusion 521 on the same side of the auxiliary light bar 700, the other end of the second reflective sheet abuts against one end of the first horizontal plane 817 on the light guide pillar 800 on the same side of the auxiliary light bar 700, which is close to the auxiliary light bar 700, that is, one end of the second reflective sheet 910 on the left side of the auxiliary light bar 700 abuts against the mounting protrusion 521 on the left side of the auxiliary light bar 700, the other end of the second reflective sheet abuts against the first horizontal plane 817 on the light guide pillar 800 on the left side of the auxiliary light bar 700, while the second reflective sheet 910 on the right side of the auxiliary light bar 700 abuts against the mounting protrusion 521 on the light guide pillar 800 on the right side of the auxiliary light bar 700, the two second reflective sheets 910 are symmetrically disposed with respect to the auxiliary light bar 700, and the mounting protrusion 521 is not located on the same horizontal plane, so as to reduce the effect of the heat generated by the auxiliary light bar 700, and the mounting protrusion 521, and the second reflective sheet 910 is also reduced when the auxiliary light bar 700 is used.
In this embodiment, the backlight module 1000 further includes a fixing screw 930, a first connecting hole 110 is disposed in a middle region of the back plate 100, a second connecting hole 511 is disposed on the connecting plate 510, and the fixing screw 930 passes through the second connecting hole 511 and is in threaded connection with the first connecting hole 110 to connect the light bar fixing plate 500 and the back plate 100, and of course, the light bar fixing plate 500 and the back plate 100 may be connected in other connection manners, such as through a pin connection or through a magnetic attraction connection of a magnet, and in addition, the connecting plate 510 is disposed on a side of the back plate 100 away from the optical film 300, so that heat generated when the light bar 600 and the auxiliary light bar 700 work can be absorbed by the fixing portion 520 of the light bar fixing plate 500 and transmitted to the connecting plate 510, and the connecting plate 510 performs large-area heat dissipation, so as to facilitate heat dissipation of the backlight module 1000 and prevent damage caused by excessive heat accumulation.
Fig. 7 is a schematic view of a cutting structure of a display device according to a third embodiment of the present application, and fig. 8 is a schematic view of a light path of a display device according to the third embodiment of the present application, where an x-axis direction in the figure is a sky side in a conventional display panel, and an-x-axis direction in the figure is a ground side in the conventional display panel, as shown in fig. 7 and fig. 8, as a third embodiment of the present application, a display device is disclosed, where the display device includes a display panel 2000, a rear case 3000, and a backlight module 1000 according to the above embodiment, and a heat dissipation area is provided on the rear case 3000, and coincides with a middle area of the backplane 100, and a plurality of heat dissipation holes are provided on the heat dissipation area of the rear case 3000, and cover the position of the light bar fixing plate 500, so that heat concentrated at the light bar fixing plate 500 can be dissipated through the heat dissipation holes, and form strong air convection to conduct the heat away.
In addition, in the installation of the display device of the present application, the backlight module 1000 is assembled first, the light bar 600 and the auxiliary light bar 700 are installed on the light bar fixing plate 500 by using a heat conducting adhesive, the light bar fixing plate 500 and the rear plate 100 are fixed by using screws, the first reflective sheet 900, the second reflective sheet 910, the light guide column 800, the light guide plate 200 and the half mirror 920 are assembled at corresponding positions, then an optical film material is placed at one time, the rubber frame 400 is assembled and clamped on the rear plate 100, thereby completing the assembly of the backlight module 1000, then a Foam adhesive tape is bonded on the rubber frame 400, the liquid crystal display panel 2000 is attached, the PCB is folded and fixed on the rear plate 100, and then the rear case 3000 is assembled, wherein a mylar tape is bonded on a COF line segment of the liquid crystal display panel to protect a COF, thereby completing the assembly of the whole display device.
Generally speaking, the display device of this application, the light-emitting component with backlight unit 1000 sets up at display panel 2000's middle part, make display device realize that the four sides does not have the frame, the ultra-thin design of four sides promptly, it obviously distinguishes to have with present market mainstream product, differentiation characteristic is obvious, can effectively improve product competitiveness, and backshell 3000 is provided with the heat dissipation region on light-emitting component's the corresponding position, the heat that light-emitting component work produced can concentrate on display panel 2000's middle part, make things convenient for display device to carry out the heat dissipation processing.
The technical solution of the present application can be widely applied to various display panels, such as TN (Twisted Nematic) display panel, IPS (In-Plane Switching) display panel, VA (Vertical Alignment) display panel, MVA (Multi-Domain Vertical Alignment) display panel, and of course, other types of display panels, such as OLED (Organic Light-Emitting Diode) display panel, and the above solution can be applied thereto.
It should be noted that the inventive concept of the present application can form a great variety of embodiments, but the application documents are limited in space and cannot be listed one by one, so that, on the premise of no conflict, any combination between the above-described embodiments or technical features can form a new embodiment, and after each embodiment or technical feature is combined, the original technical effect will be enhanced.
The foregoing is a further detailed description of the present application in connection with specific alternative embodiments and it is not intended that the present application be limited to these specific details. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.
Claims (10)
1. A backlight module, comprising:
a back panel divided into a bezel area and a middle area surrounded by the bezel area;
the light guide plate is arranged on the back plate and comprises a light inlet side and a light outlet side; and
the optical film is arranged on the light emitting side of the light guide plate;
characterized in that, the middle zone of backplate is equipped with fretwork portion, backlight unit still includes:
the light bar fixing plate is arranged at the hollow part of the back plate and is connected with the back plate; and
the light guide plate is arranged on the light guide plate, and the light guide plate is provided with a light guide plate and a light bar fixing plate;
and light rays generated by the two light bars enter the light guide plate through the light inlet side and are emitted from the light outlet side of the light guide plate.
2. The backlight module of claim 1, further comprising an auxiliary light bar, wherein the light bar fixing plate comprises a connecting plate and a fixing portion, the fixing portion protrudes from the connecting plate, the connecting plate is connected to the back plate, the two light bars are respectively disposed on two opposite sides of the fixing portion, and the auxiliary light bar is disposed on a side of the fixing portion away from the connecting plate;
the light emitting surface of the auxiliary light bar is perpendicular to the light emitting surface of the light bar and is parallel to the light emitting side of the light guide plate.
3. The backlight module according to claim 2, further comprising light guide posts, wherein the number of the light guide posts is equal to the number of the light bars, the light guide posts are fixedly connected with the connecting plate, light guide channels are disposed on the light guide posts, each light guide channel comprises a light entrance end and a light exit end, the light entrance end is located at the light exit surface of the light bar, and the light exit end is located at the light entrance side of the light guide plate;
the light generated by the light bar enters the light guide channel through the light inlet end and is emitted from the light outlet end to enter the light guide plate.
4. The backlight module according to claim 3, wherein the light guide channel has a light reflecting coating, and the light generated by the light bar enters the light guide channel through the light inlet end, and is reflected by the light reflecting coating in the light guide channel and then exits from the light outlet end to enter the light guide plate.
5. The backlight module according to claim 4, further comprising:
the first reflector plate is positioned on one side, close to the back plate, of the light guide plate, and the first reflector plate reflects light rays entering the light guide plate;
two second reflection sheets are arranged and are respectively arranged on two sides of the auxiliary light bar; and
the half-reflecting mirror is arranged at one end, far away from the fixed part, of the auxiliary light bar, one half of light generated by the auxiliary light bar is reflected by the half-reflecting mirror, and the other half of light passes through the half-reflecting mirror to be emitted;
wherein the second reflection sheet reflects the light reflected by the half mirror.
6. The backlight module of claim 5, wherein the distance between the light bar and the optical film is greater than the distance between the light guide plate and the optical film, the light guide channel comprises a first channel, a second channel and a third channel, and the second channel connects the first channel and the third channel;
the light-entering end is located in the first channel, the light-exiting end is located in the third channel, a first horizontal plane is arranged on the third channel, the first horizontal plane is close to the optical diaphragm, and the first horizontal plane is perpendicular to the light-exiting end.
7. The backlight module as claimed in claim 6, wherein a dot surface is disposed on the first horizontal plane, one end of the dot surface abuts against the light incident side of the light guide plate, the other end of the dot surface abuts against the second reflector, the dot surface includes a plurality of light-shielding strips, and the light-shielding strips are spaced apart from each other.
8. The backlight module according to claim 6, wherein two mounting protrusions are disposed on a side of the fixing portion away from the connecting plate, the two mounting protrusions are respectively disposed on two sides of the auxiliary light bar, one end of the second reflective sheet located on one side of the auxiliary light bar is abutted to the mounting protrusion located on the same side of the auxiliary light bar, the other end of the second reflective sheet is abutted to one end of the first horizontal plane on the light guide pillar located on the same side of the auxiliary light bar, the first and second reflective sheets are symmetrically disposed with respect to the auxiliary light bar.
9. The backlight module of claim 2, further comprising a fixing screw, wherein a first connecting hole is formed in the middle region of the back plate, a second connecting hole is formed in the connecting plate, and the fixing screw passes through the second connecting hole and is in threaded connection with the first connecting hole to connect the back plate and the light bar fixing plate;
wherein the connecting plate is located on one side of the back plate away from the optical film.
10. A display device, comprising a display panel, a rear case and the backlight module as claimed in any one of claims 1 to 9, wherein the rear case is provided with a heat dissipation area, and the heat dissipation area coincides with the middle area of the back plate.
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| CN202211092691.3A CN115167036B (en) | 2022-09-08 | 2022-09-08 | Backlight module and display device |
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| CN202211092691.3A CN115167036B (en) | 2022-09-08 | 2022-09-08 | Backlight module and display device |
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| CN115167036A true CN115167036A (en) | 2022-10-11 |
| CN115167036B CN115167036B (en) | 2022-12-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116072015A (en) * | 2023-03-03 | 2023-05-05 | 惠科股份有限公司 | Support and display device |
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