CN111443525B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN111443525B CN111443525B CN202010315814.XA CN202010315814A CN111443525B CN 111443525 B CN111443525 B CN 111443525B CN 202010315814 A CN202010315814 A CN 202010315814A CN 111443525 B CN111443525 B CN 111443525B
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- guide plate
- light guide
- hole
- backlight module
- light
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- 238000005192 partition Methods 0.000 claims description 24
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000012788 optical film Substances 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004080 punching Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- G02F1/133608—Direct backlight including particular frames or supporting means
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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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
-
- 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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
-
- 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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/009—Positioning aspects of the light source in the package
-
- 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
- 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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
Abstract
The application provides a backlight module and a display device, wherein the backlight module comprises a fixed frame, a light source, a light guide plate and a reflecting sheet, wherein the fixed frame is provided with a placing groove and an opening; the light source is arranged at one side of the placing groove; the light guide plate is arranged on the light emitting side of the light source, is provided with a first through hole and comprises a connecting surface; the reflecting sheet is arranged on the connecting surface of the light guide plate and is provided with a second through hole; the fixing frame comprises a baffle plate, the baffle plate is convexly arranged on the placing groove and surrounds the periphery side of the opening, and the baffle plate is positioned in the first through hole and the second through hole; the reflector plate includes the reflection lug, and the reflection lug sets up along the periphery direction of second through-hole, and is located the periphery side of baffle, and at least part of reflection lug is located the baffle and is located the one side that the light source was dorsad, and the reflection surface of reflection lug is towards the light guide plate. The reflection lug is arranged on the reflection sheet, so that light rays radiate to the reflection lug and are reflected to the backlight side of the light guide plate, and the luminous brightness of the backlight side of the light guide plate is compensated.
Description
Technical Field
The present disclosure relates to display technology, and particularly to a backlight module and a display device.
Background
With the development of display technology, current display devices such as mobile phones have increasingly higher display requirements and effects on screens, especially on comprehensive screens with increasingly higher screen occupation ratio requirements, such as perforated special-shaped screens.
In the present small and medium sized lcd modules, backlight sources such as mobile phones, tablets and notebooks use side-entry type light emission. In the existing special-shaped structures such as punching and the like, the part of the punching position, which is opposite to the light source, is not directly irradiated by light, so that a dark area of the light source is probably caused, and the light is unevenly distributed, so that the liquid crystal screen is unevenly displayed.
Disclosure of Invention
The embodiment of the application provides a backlight module and a display device, which are used for solving the technical problem that a part of the backlight module, which is opposite to a light source, generates a dark area at the opening position of the conventional punching type display module.
The embodiment of the application provides a backlight module, which comprises:
the fixing frame is provided with a placing groove and an opening, and the opening penetrates through the placing groove;
the light source is arranged on one side of the placing groove;
the light guide plate is arranged in the placing groove and positioned at the light emitting side of the light source, the light guide plate comprises a light guide plate main body, a first through hole is formed in the light guide plate main body, the first through hole and the open hole are correspondingly arranged, and the light guide plate main body comprises a light emitting surface and a connecting surface which are oppositely arranged; and
the reflecting sheet is arranged on the connecting surface of the light guide plate main body and comprises a reflecting sheet main body, a second through hole is formed in the reflecting sheet main body, and the second through hole is arranged corresponding to the first through hole;
the fixing frame comprises an annular partition plate, the partition plate is arranged on the placing groove in a protruding mode and surrounds the outer peripheral side of the opening, and the partition plate is located on the inner peripheral sides of the first through hole and the second through hole;
the reflector plate further comprises a reflector lug convexly arranged on the reflector plate main body, the reflector lug is arranged along the peripheral direction of the second through hole and is positioned on the peripheral side of the partition plate, at least part of the reflector lug is positioned on one side of the partition plate, which is opposite to the light source, and the reflecting surface of the reflector lug faces the light guide plate.
In the backlight module of the embodiment of the application, the fixing frame comprises a corner, and the corner is arranged at one side of the fixing frame far away from the light source and close to the opening;
the height of the reflective tabs decreases from an end proximate to the corner to an end distal to the corner.
In the backlight module of the embodiment of the application, the reflective sheet further includes a plurality of microstructures, the microstructures are used for performing divergent processing on the incident light, and the microstructures are disposed on the reflective surface of the reflective tab.
In the backlight module of the embodiment of the application, the microstructure is a concave lens.
In the backlight module of the embodiment of the application, the reflector plate main body and the reflector tab are of an integrally formed structure.
In the backlight module of the embodiment of the application, the light guide plate further includes a plurality of dots, the plurality of dots are fixedly disposed on the connection surface, a portion of the light guide plate main body, which is opposite to the light source, is a backlight portion, and the density of the dots located in the backlight portion is greater than that of the dots located in other portions of the light guide plate main body.
In the backlight module of the embodiment of the application, the opening, the first through hole and the second through hole are all round holes, and the partition plate is in a ring shape.
In the backlight module of the embodiment of the application, the reflective lug is arc-shaped.
In the backlight module of the embodiment of the application, the backlight module further comprises an optical film, and the optical film is arranged on the light emitting surface of the light guide plate.
The embodiment of the application also relates to a display device, which comprises the backlight module and the display panel, wherein the display panel is arranged on the backlight module.
According to the backlight module, the reflection lug is arranged on the reflection sheet, so that light rays in the light guide plate are radiated to the reflection lug and reflected to one side (backlight side) of the opening in the light guide plate, which is far away from the light source, so that the part of the first through hole position in the light guide plate, which is away from the light source, is compensated for the luminous brightness, and the uniformity of light output from the light guide plate surface is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following brief description is given of the drawings that are required to be used in the embodiments. The drawings in the following description are only some of the embodiments of the present application and other drawings may be derived from them by those skilled in the art without inventive effort.
Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the application;
FIG. 2 is a schematic cross-sectional view taken along line AA in FIG. 1;
FIG. 3 is an exploded view of a backlight module according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a reflective sheet of a backlight module according to an embodiment of the application;
fig. 5 is a schematic bottom view of a light guide plate of a backlight module according to an embodiment of the application;
fig. 6 is a schematic structural diagram of a display device according to an embodiment of the application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the application; FIG. 2 is a schematic cross-sectional view taken along line AA in FIG. 1; fig. 3 is an exploded view of a backlight module according to an embodiment of the application.
The backlight module 100 of the present embodiment includes a fixing frame 11, a light source 12, a light guide plate 13, a reflective sheet 14 and an optical film 15. The light source 12 is disposed at one side within the fixed frame 11. The reflection sheet 14 is disposed in the fixing frame 11. The light guide plate 13 is disposed on the light emitting side of the light source 12 and on the reflecting sheet 14. The optical film 15 is disposed on the light-emitting surface 13a of the light guide plate 13.
Specifically, the fixing frame 11 is provided with a placement groove 111 and an opening 112, and the opening 112 penetrates the placement groove 111. The light source 12 is disposed at one side of the placement groove 111.
The light guide plate 13 is disposed in the placement groove 111 and is positioned on the light emitting side of the light source 12. The light guide plate 13 includes a light guide plate body 131. The light guide plate body 131 is provided with a first through hole 132, and the first through hole 132 and the opening 112 are correspondingly arranged. The light guide plate body 131 includes a light emitting surface 13a and a connection surface 13b disposed opposite to each other.
The reflection sheet 14 is provided on the connection surface 13b of the light guide plate body 131. The reflection sheet 14 includes a reflection sheet body 141. The reflective sheet body 141 is provided with a second through hole 142, and the second through hole 142 is provided corresponding to the first through hole 132.
The fixing frame 11 includes an annular partition plate 113, the partition plate 113 is protruded on the placement groove 111 and surrounds the outer peripheral side of the opening 112, and the partition plate 113 is located at the inner peripheral side of the first through hole 132 and the second through hole 142.
The reflection sheet 14 further includes a reflection tab 143 protruding from the reflection sheet body 141. The reflection tab 143 is disposed along the outer circumferential direction of the second through hole 142 and is located at the outer circumferential side of the partition 113. At least a portion of the reflective tab 143 is located on a side of the baffle 113 facing away from the light source 12. The reflection surface of the reflection tab 143 faces the light guide plate 13.
Alternatively, the reflective sheet body 141 and the reflective tab 143 are integrally formed. Such an arrangement improves the stability of the connection of the reflective sheet body 141 and the reflective tab 143.
In the backlight module 100 of the present embodiment, the reflective tab 143 is disposed on the reflective sheet 14, so that the light in the light guide plate 13 is radiated to the reflective tab 143 and reflected to the side (backlight side) of the opening 112 of the light guide plate 13 away from the light source 12, so as to compensate the light-emitting brightness of the portion of the light guide plate 13 where the first through hole 132 is located opposite to the light source 12, thereby improving the uniformity of the light emitted from the surface of the light guide plate 13.
Specifically, since the partition 113 is disposed around the outer periphery of the opening 112, the light of the light source 12 cannot be directly radiated to the side of the partition 113 facing away from the light source 12, so that the light of the light source 12 cannot be directly radiated to the portion of the light guide plate 13 facing away from the light source 12 of the partition 113, which is defined as a backlight portion in the embodiment. In the backlight module 100 of the present embodiment, the reflective tab 143 is disposed on the backlight side of the partition 113, and the light radiated to the reflective tab 143 is reflected to the backlight portion of the light guide plate 13 by the light guiding function inside the light guide plate 13, so as to compensate the light emitting brightness of the backlight portion, thereby improving the uniformity of the light emitted from the surface of the light guide plate 13.
In some embodiments, the reflective tab 143 further includes another reflective surface that faces the baffle. By the arrangement, the uniformity of light emitted from the light guide plate surface is further improved.
In some embodiments, the reflective tabs 143 are disposed around the annular spacer. That is, the reflection tab 143 is annular and is fitted around the outer periphery of the partition.
In the backlight module 100 of the present embodiment, referring to fig. 1 and 4, the fixing frame 11 includes a corner R, and the corner R is disposed on a side of the fixing frame 11 away from the light source 12 and close to the opening 112.
The height of the reflective tab 143 decreases from an end near the corner R to an end far from the corner R. Since the corner R is closest to the partition 113, the brightness of the portion of the light guide plate 13 near the corner R is darkest. The height of the reflective tabs 143 is graded to reflect and compensate for unequal amounts of light, so that the backlight portion is more uniformly illuminated.
The greater the height of the reflective tab 143, the greater the light reflection area, and the better the light compensation effect, and vice versa. The height of the reflective tab 143 can be adjusted according to the actual brightness.
Optionally, the openings 112, the first through hole 132, and the second through hole 142 are circular holes. The partition 113 has a circular ring shape. The reflective tab 143 is arc-shaped. The shape of the openings 112, the first through holes 132 and the second through holes 142 may be square, triangular or other shapes, which is not limited in this embodiment. The shape of the partition 113 may be adjusted accordingly according to the shape of the opening 112. The shape of the reflective tab 143 may be adjusted accordingly according to the shape of the barrier 113.
Further, referring to fig. 4, the reflective sheet 14 further includes a plurality of microstructures 144, and the microstructures 144 are used for diverging the incident light. A plurality of microstructures 144 are disposed on the reflective surface 14a of the reflective tab 143.
The arrangement of the microstructures 144 further improves the light compensation effect on the backlight portion. When light is radiated to the microstructure 144, the microstructure 144 diverges the light, so that the incident angle of the light is enlarged; then, the diverged light is radiated onto the reflecting surface 14a of the reflecting tab 143 and reflected by the reflecting surface 14a, thereby enlarging the reflection angle of the reflected light and further improving the light compensation effect on the backlight part.
Alternatively, the microstructures 144 are concave lenses, but are not limited thereto.
In the backlight module 100 of the embodiment of the application, referring to fig. 5, the light guide plate 13 further includes a plurality of dots 133, and the plurality of dots 133 are fixedly disposed on the connection surface 13b.
The portion of the light guide plate body 131, which is opposite to the light source 12, is a backlight portion. The density of the dots 133 at the backlight part is greater than that of the other parts of the light guide plate body 131 where the dots 133 are located. The backlight part is the same as the backlight part described above.
The other portions of the light guide plate body 131 are all regions of the light guide plate body 131 except the backlight portion.
The present embodiment improves the brightness of the backlight portion by varying the density of the dots 133 so that the surface light of the light guide plate 13 has uniformity. In addition, in the present embodiment, the density setting of the dots 133 and the height of the reflection tab 143 may be cooperatively set. That is, when the dot density of the backlight part 133 is large, the height of the reflective tab 143 may be correspondingly adjusted to make the surface light emitting of the light guide plate 13 have uniformity. And vice versa.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a display device according to an embodiment of the application. The embodiment of the application also relates to a display device 1000, wherein the display device 100 comprises the backlight module 100 and the display panel 200 according to the above embodiments. The display panel 200 is disposed on the backlight module 100.
The backlight module 100 of the display device 1000 of the present embodiment is similar to or the same as the backlight module 100 of the above embodiment, and specific reference is made to the content of the backlight module 100 of the above embodiment, which is not described herein.
According to the backlight module, the reflection lug is arranged on the reflection sheet, so that light rays in the light guide plate are radiated to the reflection lug and reflected to one side (backlight side) of the opening in the light guide plate, which is far away from the light source, so that the part of the first through hole position in the light guide plate, which is away from the light source, is compensated for the luminous brightness, and the uniformity of light output from the light guide plate surface is improved.
The above describes a backlight module and a display device provided by the embodiments of the present application in detail, and specific examples are applied to describe the principles and embodiments of the present application, and the description of the above embodiments is only for helping to understand the technical solution and core ideas of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (7)
1. A backlight module, comprising:
the fixing frame is provided with a placing groove and an opening, and the opening penetrates through the placing groove;
the light source is arranged on one side of the placing groove;
the light guide plate is arranged in the placing groove and positioned at the light emitting side of the light source, the light guide plate comprises a light guide plate main body, a first through hole is formed in the light guide plate main body, the first through hole and the open hole are correspondingly arranged, and the light guide plate main body comprises a light emitting surface and a connecting surface which are oppositely arranged; and
the reflecting sheet is arranged on the connecting surface of the light guide plate main body and comprises a reflecting sheet main body, a second through hole is formed in the reflecting sheet main body, and the second through hole is arranged corresponding to the first through hole;
the fixing frame comprises an annular partition plate, the partition plate is arranged on the placing groove in a protruding mode and surrounds the outer peripheral side of the opening, and the partition plate is located on the inner peripheral sides of the first through hole and the second through hole;
the reflecting sheet further comprises a reflecting lug protruding on the reflecting sheet main body, the reflecting lug is arranged along the peripheral direction of the second through hole and is positioned on the peripheral side of the partition board, at least part of the reflecting lug is positioned on one side of the partition board, which is opposite to the light source, and the reflecting surface of the reflecting lug faces the light guide plate; the reflective tab further includes another reflective surface facing the baffle;
the fixed frame comprises a corner, and the corner is arranged on one side of the fixed frame far away from the light source and close to the opening;
the height of the reflective tab decreases from an end near the corner to an end far from the corner;
the hole, the first through hole and the second through hole are round holes, the partition plate is in a circular ring shape, and the reflecting lug is in an arc shape.
2. A backlight module according to claim 1, wherein the reflective sheet further comprises a plurality of microstructures for diverging incident light, the microstructures being disposed on the reflective surface of the reflective tab.
3. A backlight module according to claim 2, wherein the microstructure is a concave lens.
4. A backlight module according to claim 1, wherein the reflector plate body and the reflector tab are of an integrally formed structure.
5. The backlight module according to claim 1, wherein the light guide plate further comprises a plurality of dots, the plurality of dots are fixedly arranged on the connection surface, a portion of the light guide plate main body, which is opposite to the light source, of the first through hole is a backlight portion, and the density of the dots in the backlight portion is greater than that of the dots in other portions of the light guide plate main body.
6. The backlight module according to claim 1, further comprising an optical film disposed on the light emitting surface of the light guide plate.
7. A display device comprising a backlight module according to any one of claims 1-6 and a display panel arranged on the backlight module.
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| CN202010315814.XA CN111443525B (en) | 2020-04-21 | 2020-04-21 | Backlight module and display device |
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| CN202010315814.XA CN111443525B (en) | 2020-04-21 | 2020-04-21 | Backlight module and display device |
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| CN114815354A (en) * | 2022-05-09 | 2022-07-29 | 广州华星光电半导体显示技术有限公司 | Display panel and display device |
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| CN111443525A (en) | 2020-07-24 |
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