CN113934060B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN113934060B CN113934060B CN202111328578.6A CN202111328578A CN113934060B CN 113934060 B CN113934060 B CN 113934060B CN 202111328578 A CN202111328578 A CN 202111328578A CN 113934060 B CN113934060 B CN 113934060B
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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
-
- 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
- G02F1/133509—Filters, e.g. light shielding masks
-
- 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
- G02F1/133553—Reflecting elements
Abstract
The embodiment of the invention discloses a backlight module and a display device. The backlight module comprises: a substrate; a plurality of light sources arranged on one side of the substrate; the size of the side, far away from the substrate, of the protective layer is smaller than the size of the side, close to the substrate, of the protective layer; the functional layer is arranged on the side wall of the protective layer and is used for reducing light leakage of the side wall of the protective layer. According to the technical scheme provided by the embodiment of the invention, the light leakage phenomenon of the edge area of the existing backlight module can be improved, and the display effect of the display device can be improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a backlight module and a display device.
Background
With the development of display technology, the liquid crystal display screen is widely applied to various devices needing to realize display due to the characteristics of low power consumption, high definition, long service life, small volume, light weight and the like.
The backlight modules of the existing liquid crystal display screen are divided into two main types of direct type backlight modules and side-in type backlight modules according to different backlight source positions. The direct type backlight module has the advantages of good light emitting visual angle, high utilization rate, simple structure, low cost and the like. However, for the direct type backlight module, since the backlight source is disposed below each film layer rather than on the side surface, light is inevitably leaked from the edge, so that a certain light leakage area exists around the backlight module and the display device where the backlight module is located, and the display effect is very affected.
Disclosure of Invention
The embodiment of the invention provides a backlight module and a display device, which are used for improving the phenomenon of light leakage in the edge area of the conventional backlight module and being beneficial to improving the display effect of the display device.
In a first aspect, an embodiment of the present invention provides a backlight module, including:
a substrate;
a plurality of light sources arranged on one side of the substrate;
a protective layer covering the light source, wherein the dimension of the protective layer on one side far away from the substrate is smaller than the dimension of the protective layer on one side close to the substrate;
the functional layer is arranged on the side wall of the protective layer and is used for reducing light leakage of the side wall of the protective layer.
In a second aspect, an embodiment of the present invention further provides a display device, including the above-mentioned backlight module and a liquid crystal panel located at a light emitting side of the backlight module.
The backlight module provided by the embodiment of the invention comprises a substrate, a plurality of light sources arranged on one side of the substrate, a protective layer covering the light sources and a functional layer arranged on the side wall of the protective layer. The dimension of the side, far away from the substrate, of the protective layer is smaller than the dimension of the side, close to the substrate, of the protective layer, so that the protective layer forms a wedge-like shape; the functional layer is arranged on the side wall of the protective layer and can reflect or absorb light rays emitted from the side wall of the protective layer, so that the intensity of the light rays leaked from the side wall of the protective layer is reduced, uneven display is avoided, and the display effect of the display device is improved.
Drawings
FIG. 1 is a schematic diagram of a related art liquid crystal display device;
fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present invention;
fig. 3 and fig. 4 are schematic structural diagrams of another backlight module according to an embodiment of the invention;
fig. 5 is a schematic structural diagram of another backlight module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a backlight module according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a backlight module according to another embodiment of the present invention;
fig. 8 is a schematic structural diagram of a backlight module according to another embodiment of the present invention;
fig. 9 is a schematic structural diagram of a backlight module according to another embodiment of the present invention;
fig. 10 is a schematic structural diagram of a backlight module according to another embodiment of the present invention;
fig. 11 is a schematic structural diagram of a backlight module according to another embodiment of the present invention;
fig. 12 and fig. 13 are schematic partial structures of a backlight module according to an embodiment of the invention;
fig. 14 and fig. 15 are schematic partial structures of another backlight module according to an embodiment of the invention;
fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present invention are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in the context, it will also be understood that when an element is referred to as being formed "on" or "under" another element, it can be directly formed "on" or "under" the other element or be indirectly formed "on" or "under" the other element through intervening elements. The terms "first," "second," and the like, are used for descriptive purposes only and not for any order, quantity, or importance, but rather are used to distinguish between different components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Fig. 1 is a schematic diagram of a related art liquid crystal display device. Referring to fig. 1, the liquid crystal display device includes a backlight module 01 and a liquid crystal panel 02 disposed on a light emitting side of the backlight module 01. The backlight module 01 includes a substrate 011 and a plurality of light sources 012 disposed on one side of the substrate 011, wherein the light sources 012 may be light emitting diodes LEDs, a protective adhesive layer 013 is covered on the light sources 012, and a plurality of optical film layers are disposed between the protective adhesive layer 013 and the liquid crystal panel 02 to play roles in dispersing light and homogenizing light, such as a first light splitting film 014, a second light splitting film 015, a third light splitting film 016, a lower brightness enhancement film 017, an upper brightness enhancement film 018 and a diffusion sheet 019. Further, a tape 0110 and a back plate 0111 are provided on the other side of the substrate 011, and the tape 0110 is used to fix the substrate 011 to the back plate 0111. The liquid crystal panel 02 includes a lower polarizer 021, an array substrate 022, a color film substrate 023 and an upper polarizer 024. The lower polarizer 021 is located between the color film substrate 023 and the backlight module 01. The array substrate 022 is located between the color film substrate 023 and the lower polarizer 021, and the color film substrate 023 is located between the array substrate 022 and the upper polarizer 024. The display device further comprises a glue frame 03 and a fixing adhesive tape 04, wherein the glue frame 03 is used for providing support for the liquid crystal panel 02, the fixing adhesive tape 04 is used for bonding and fixing the backlight module 01 and the liquid crystal panel 02, and the backlight module 01 and the liquid crystal panel 02 are assembled together.
Because in the membrane assembly process, the gaps are inevitably formed between each membrane layer and the glue frame 03, so that part of light a emitted by the light source 012 is emitted from the side wall of the protective glue layer 013, the brightness of the light is very uneven because the leaked light does not pass through the optical membrane layer above the light is transmitted, and especially in a product with a narrow frame, the light leakage area of the backlight module provided by the prior art is difficult to be completely hidden outside a visible area through structural design, and a certain light leakage area exists around the backlight module and the display device where the backlight module is located, so that adverse effects can be brought to the display effect of the display device.
In order to solve the above-mentioned problems, fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present invention. Referring to fig. 2, the backlight module provided in this embodiment includes: a substrate 10; a plurality of light sources 20 disposed on one side of the substrate 10; a protective layer 30 covering the light source 20, the protective layer 30 having a smaller dimension away from the substrate 10 than the protective layer 30; the functional layer 40, the functional layer 40 is disposed on a sidewall of the protective layer 30, and the functional layer 40 is used for reducing light leakage from the sidewall of the protective layer 30.
The light source 20 may be an LED, and in specific implementation, a white LED emitting white light may be used, or a blue LED emitting blue light may be used, and then a color conversion layer is disposed at an emitting end of the light source 20 to convert blue light into white light. The substrate 10 is provided with a circuit for driving the light source 20 to emit light, for example, a connection electrode and a corresponding power line to the light source 20. The protective layer 30 may be made of a resin material having high light transmittance, and functions to protect the LED and insulate. In this embodiment, in order to avoid the side wall of the protection layer 30 from leaking light and affecting the display effect, the protection layer 30 is shaped to have a small upper area and a large lower area, wherein the upper side is the side of the protection layer 30 away from the substrate 10, and the lower side is the side of the protection layer close to the substrate 10. And the side wall of the protective layer 30 is covered with the functional layer 40, for example, the functional layer 40 may have a function of reflecting light or absorbing light.
It can be understood that, the structure shown in fig. 2 is a schematic cross-sectional structure of the backlight module, and the overall shape of the protective layer 30 is a wedge shape, for example, when the substrate 10 is a rectangular flat plate shape, the protective layer 30 is a prismatic table shape formed above the substrate 10. With continued reference to fig. 2, in one embodiment, the protective layer 30 has a trapezoidal cross-sectional shape in a first cross-section, wherein the first cross-section is perpendicular to the plane of the substrate 10.
In a specific implementation, the sidewall of the protection layer 30 may be formed by etching, so that the sidewall is not necessarily planar, and in other embodiments, the sidewall of the protection layer 30 may be curved. For example, fig. 3 and fig. 4 are schematic structural diagrams of another backlight module according to an embodiment of the present invention, referring to fig. 3 and fig. 4, the shape of the side wall of the protection layer 30 may be arc-shaped, and may be selected according to practical situations when the protection layer 30 is implemented, as long as the upper surface area of the protection layer 30 is smaller than the lower surface area, and the side wall is covered with the functional layer 40 to reduce light leakage. In the following embodiments, the protection layer 30 is taken as a trapezoid, and the present invention is not limited thereto.
According to the technical scheme, the dimension of the side, far away from the substrate, of the protective layer is smaller than the dimension of the side, close to the substrate, of the protective layer, so that the protective layer is shaped like a wedge; the functional layer is arranged on the side wall of the protective layer and can reflect or absorb light rays emitted from the side wall of the protective layer, so that the intensity of the light rays leaked from the side wall of the protective layer is reduced, uneven display is avoided, and the display effect of the display device is improved.
With continued reference to fig. 2, in this embodiment, the cross section of the protective layer 30 forms a trapezoid having a waist and a bottom with an angle greater than 0 ° and less than 90 °. The included angle between the trapezoid waist and the lower bottom is between 0 and 90 degrees, so that the side wall of the protective layer 30 is in an inclined state, and the effect of blocking light leakage by the functional layer is ensured.
Referring to fig. 5, in the embodiment, the height of the light source 20 is H, the minimum distance between the light source 20 closest to the edge of the substrate 10 and the edge of the substrate is L, and the protective layer 30 is used to protect the light source 20 on the substrate 10, so that the protective layer 30 is required to completely cover all the light sources 20, i.e. the thickness D of the protective layer 30 is greater than the height H of the light source 20. For the light source 20 at the edge position, in order to ensure complete coverage of the protective layer 30, the critical condition is that the sidewalls of the protective layer 30 intersect the vertices of the light source 20, i.eAlpha is the acute angle between the side wall and the bottom surface of the protective layer 30. Therefore, in the implementation process, the +.>So as to ensure that the protective layer 30 has protective performance for all the light sources 20, and can avoid insufficient marginal light caused by the fact that the side wall inclination angle is too small and the light sources are arranged at the edge positions in a seamless manner.
Fig. 6 is a schematic structural diagram of a backlight module according to another embodiment of the invention. Referring to fig. 6, fig. 6 also shows a part of light rays of the backlight module, and in this embodiment, the functional layer 40 includes a reflective layer 41. When part of the oblique light emitted from the light source 20 at the edge of the substrate 10 is transmitted to the sidewall of the protective layer 30, the reflective layer 41 reflects part of the light, where part of the light may return to the substrate 10 and be absorbed by the substrate, and part of the light may be reflected by the substrate 10 and exit from the upper surface of the protective layer 30 as light for providing backlight. By arranging the reflective layer 41 on the side wall of the protective layer 30, light can be prevented from exiting from the side wall of the protective layer 30, and the possibility of lateral light leakage of the backlight module is reduced. In some embodiments, the reflective layer 41 may be formed by using Ag, al, or other materials through a spraying process, and may be selected according to practical situations, which is not limited in the embodiments of the present invention.
Fig. 7 is a schematic structural diagram of a backlight module according to another embodiment of the invention. Referring to fig. 7, fig. 7 also shows a part of light rays of the backlight module, and in this embodiment, the functional layer 40 includes a light absorbing layer 42. When part of the oblique light emitted from the light source 20 at the edge of the substrate 10 is transmitted to the side wall of the protective layer 30, the light absorbing layer 42 absorbs the part of the light, so as to avoid the light from exiting from the side wall of the protective layer 30 and reduce the possibility of lateral light leakage of the backlight module.
In addition to using a white light source, the white light can be excited by the blue light source and the color conversion layer, so that in some embodiments of the backlight module, the blue light source can be used as the light source. Fig. 8 is a schematic structural diagram of another backlight module according to an embodiment of the present invention, in this embodiment, the light source 20 emits blue light, and when the embodiment is implemented, the light source 20 includes a Mini LED emitting blue light. Mini LEDs refer to LED chips with a size on the order of 100 μm, and the size is between that of small-pitch LEDs and Micro LEDs, which is the result of further refinement of small-pitch LEDs. The small-spacing LEDs refer to LED backlights or display products with the spacing between adjacent lamp bead points below 2.5 millimeters. The Mini LED is used as a light source in the backlight module, the size of the crystal grain of the traditional LED is reduced to be between 100 mu m and 200 mu m, the number of backlight sources is greatly increased, and the regional brightness adjustment can be realized by matching with regional dimming (local dimming) control, so that better visual experience is brought, and the power consumption is reduced.
When the light source 20 emits blue light, the blue light needs to be converted into white light to provide backlight for the liquid crystal panel. With continued reference to fig. 8, the backlight module further includes a color conversion layer 50 disposed on a side of the protection layer 30 away from the substrate 10, where the color conversion layer 50 converts the blue light emitted from the light source 20 into white light.
It will be appreciated that, according to the color light principle, the blue light and the yellow light may be mixed to form white light, or the blue light, the green light and the red light may be mixed to form white light, and in particular implementation, the color conversion layer 50 may include a yellow quantum dot material or a mixed material of a red quantum dot material and a green quantum dot material. The yellow quantum dot material absorbs blue light and emits yellow light, and the yellow light and the unabsorbed blue light are combined into white light; the red quantum dot material absorbs blue light and emits red light, the green quantum dot material absorbs blue light and emits green light, and the red light, the green light and the blue light are combined into white light. Blue light emitted by a blue light Mini LED is converted into white light through the quantum dot material, so that the proportion of display color to NTSC color gamut is improved from 75% to 100%, and a better visual effect is brought to consumers.
When the light source of the backlight module provided by the embodiment of the invention emits blue light, if the side wall of the protective layer leaks light, the problem that four sides of the display device emit blue light can occur. Fig. 9 is a schematic structural diagram of a backlight module according to another embodiment of the invention. Referring to fig. 9, in the present embodiment, the light source 20 emits blue light, and the light absorbing layer 42 includes a yellow ink layer 421 and a black ink layer 422 which are stacked, and the yellow ink layer 421 is in contact with the side wall of the protective layer 30. In particular, the light absorbing layer 42 may be formed by laminating an adhesive tape, such as silk-screening yellow ink under the adhesive tape, silk-screening black ink on the adhesive tape, and then attaching the adhesive tape to the side wall of the protective layer 30, where the black ink is used to absorb light, and the yellow ink may be used to form white light by combining blue light emitted from the light source 20, so as to effectively reduce blue light at the edge.
In the embodiment using the blue light LED+quantum dot material, as the quantum dot material is cut to cause the edge quantum dot to be directly exposed in the display and contacted with moisture and oxygen, a failure area is generated at the peripheral edge of the quantum dot layer, and the quantum dot in the failure area fails, so that yellow light mixed with blue light or red light and green light cannot be generated in the failure area, and the blue light directly penetrates through the failure area to cause the problem of edge bluing. Fig. 10 is a schematic structural diagram of a backlight module according to another embodiment of the invention. Referring to fig. 10, in the present embodiment, the length of the yellow ink layer 421 is greater than the length of the black ink layer 422 in the first direction x; the first direction x is parallel to the plane of the sidewall of the protection layer 30 and is located in a plane perpendicular to the plane of the substrate 10. The arrangement can enable the edge area of the backlight module to directly emit white light, and the problem of blue edge caused by failure of the quantum dot material is avoided.
In the embodiment shown in fig. 10, the height of the yellow ink layer 421 is the same as the height of the protective layer 30, and the height of the black ink layer 422 is smaller, and in another embodiment, the height of the black ink layer 422 is the same as the height of the protective layer, and the yellow ink layer 421 extends to a partial region of the top surface of the protective layer 30. Fig. 11 is a schematic structural diagram of another backlight module according to an embodiment of the invention. Referring to fig. 11, the black ink layer 422 completely covers the side wall of the protective layer 30 to ensure the effect of avoiding light leakage from the side wall, and the yellow ink layer 421 extends to a partial region of the top surface of the protective layer 30, so as to reduce the edge bluing phenomenon caused by the failure of the quantum dot material in the edge region, and in a specific implementation, the extending length of the yellow ink layer 421 can be designed according to actual needs, and the size of the yellow ink layer 421 is not limited in the embodiment of the present invention. It should be noted that, since the yellow ink layer 421 does not have a function of converting light, and has a function of shielding light, in order to ensure brightness of the backlight module, the yellow ink layer 421 needs to be reduced in size as much as possible under the premise of avoiding bluing of edges during design.
Optionally, an optical auxiliary structure is disposed at an edge of the substrate near the protective layer, where the optical auxiliary structure includes a plurality of protrusions or recesses located on a surface of the substrate. Optionally, the protrusions or recesses are filled with white or yellow optical material.
Fig. 12 and fig. 13 are schematic views of a partial structure of a backlight module according to an embodiment of the invention. Referring to fig. 12 or 13, in this embodiment, similar to the structure shown in fig. 6, when the side wall of the protective layer 30 is sprayed with a reflective layer, dense protrusions (fig. 12) or recesses (fig. 13) may be molded around the substrate in consideration of the combination and utilization of the reflected light, and the molding material may be an optical material such as polycarbonate PC or polymethyl methacrylate PMMA. The shape of the bulge or the dent can be a semi-elliptic, conical, rectangular and other functional structures which are beneficial to light absorption, scattering, reflection and the like. When a blue light source is adopted, the blue light can be synthesized into white light by using a yellow optical material, so that the problem of edge bluing is reduced.
Fig. 14 and fig. 15 are schematic partial structures of another backlight module according to an embodiment of the invention. Referring to fig. 14 or 15, in the present embodiment, similar to the structure shown in fig. 9, when the light absorbing layer is formed on the side wall of the protective layer 30, the yellow ink layer and the black ink layer are matched with the concave-convex points of the edge of the substrate 10, so that blue light on the edge can be effectively reduced.
In other embodiments, the edge area of the substrate may be provided with both a bump and a recess, and may be set according to practical situations when implementing the method.
Fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to fig. 16, the display device includes any one of the backlight modules 100 provided in the above embodiments and a liquid crystal panel 200 disposed on a light emitting side of the backlight module 100. The backlight module 100 includes a substrate 10 and a plurality of light sources 20 disposed on one side of the substrate 10, wherein the light sources 20 may be light emitting diodes LEDs, a protective layer 30 is covered on the light sources 20, the protective layer 30 has a wedge shape, and a functional layer (not shown in fig. 16) for reflecting or absorbing light is disposed on a sidewall of the protective layer 30. A plurality of optical film layers are disposed between the backlight module and the liquid crystal panel 200, and serve to disperse light and homogenize light, for example, the first light splitting film 101, the second light splitting film 102, the third light splitting film 103, the lower brightness enhancement film 104, the upper brightness enhancement film 105, and the diffusion sheet 106. When the light source is a blue LED, a fourth light splitting film and a blue light penetration enhancing film Blue light Transmission, BLT may be further included. Further, a tape 107 and a back plate 108 are provided on the other side of the substrate 10, and the tape 107 is used to fix the substrate 10 to the back plate 108. The liquid crystal panel 200 includes a lower polarizer 201, an array substrate 202, a color film substrate 203, and an upper polarizer 204. A liquid crystal layer (not shown in fig. 16) is disposed between the array substrate 202 and the color film substrate 203. The display device further comprises a glue frame 300 and a fixing adhesive tape 400, wherein the glue frame 300 is used for providing support for the liquid crystal panel 200, the fixing adhesive tape 400 is used for bonding and fixing the backlight module 100 and the liquid crystal panel 200, and the backlight module 100 and the liquid crystal panel 200 are assembled together. The display device can be a mobile phone, a computer, intelligent wearable equipment and the like.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (13)
1. A backlight module, comprising:
a substrate;
a plurality of light sources arranged on one side of the substrate;
a protective layer covering all the light sources at the same time, wherein the dimension of the protective layer on one side far away from the substrate is smaller than the dimension of the protective layer on one side close to the substrate;
the functional layer is arranged on the side wall of the protective layer and is used for reducing light leakage of the side wall of the protective layer.
2. A backlight module according to claim 1, wherein the protective layer has a trapezoid cross-section in a first cross-section, and the first cross-section is perpendicular to the plane of the substrate.
3. A backlight module according to claim 2, wherein the angle between the waist and the bottom of the trapezoid is greater than 0 ° and less than 90 °.
4. A backlight module according to claim 1, wherein the functional layer comprises a reflective layer.
5. A backlight module according to claim 1, wherein the functional layer comprises a light absorbing layer.
6. A backlight module according to claim 5, wherein the light source emits blue light, the light absorbing layer comprises a yellow ink layer and a black ink layer which are stacked, and the yellow ink layer is in contact with a side wall of the protective layer.
7. The backlight module according to claim 6, wherein the length of the yellow ink layer is greater than the length of the black ink layer along the first direction;
the first direction is parallel to a plane where the side wall of the protective layer is located, and is located in a plane perpendicular to the plane where the substrate is located.
8. A backlight module according to claim 1, wherein an edge of the substrate near the protective layer is provided with an optical auxiliary structure, and the optical auxiliary structure comprises a plurality of protrusions or depressions on the surface of the substrate.
9. A backlight module according to claim 8, wherein the light source emits blue light, and the protrusions or recesses are filled with white or yellow optical material.
10. A backlight module according to claim 1, wherein the light source comprises a Mini LED emitting blue light.
11. The backlight module according to claim 10, further comprising a color conversion layer on a side of the protective layer away from the substrate, wherein the color conversion layer converts blue light emitted from the light source into white light.
12. A backlight module according to claim 11, wherein the color conversion layer comprises a yellow quantum dot material or a mixture of a red quantum dot material and a green quantum dot material.
13. A display device, comprising the backlight module of any one of claims 1 to 12 and a liquid crystal panel positioned on a light emitting side of the backlight module.
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| CN113934060B true CN113934060B (en) | 2023-12-15 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090054840A (en) * | 2007-11-27 | 2009-06-01 | 엘지디스플레이 주식회사 | Back light and liquid crystal display device having thereof |
| CN108572481A (en) * | 2018-03-08 | 2018-09-25 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN109461723A (en) * | 2018-10-22 | 2019-03-12 | 青岛海信电器股份有限公司 | Light-emitting diode lamp-plate, its protection packaging method, backlight module and display device |
| CN113759590A (en) * | 2021-10-13 | 2021-12-07 | 厦门天马微电子有限公司 | Backlight and display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM576667U (en) * | 2018-10-22 | 2019-04-11 | 隆達電子股份有限公司 | Display device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090054840A (en) * | 2007-11-27 | 2009-06-01 | 엘지디스플레이 주식회사 | Back light and liquid crystal display device having thereof |
| CN108572481A (en) * | 2018-03-08 | 2018-09-25 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN109461723A (en) * | 2018-10-22 | 2019-03-12 | 青岛海信电器股份有限公司 | Light-emitting diode lamp-plate, its protection packaging method, backlight module and display device |
| CN113759590A (en) * | 2021-10-13 | 2021-12-07 | 厦门天马微电子有限公司 | Backlight and display device |
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| CN113934060A (en) | 2022-01-14 |
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