CN110211488B - Quantum dot backlight and vehicle-mounted display screen with same - Google Patents
Quantum dot backlight and vehicle-mounted display screen with same Download PDFInfo
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- CN110211488B CN110211488B CN201910386071.2A CN201910386071A CN110211488B CN 110211488 B CN110211488 B CN 110211488B CN 201910386071 A CN201910386071 A CN 201910386071A CN 110211488 B CN110211488 B CN 110211488B
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Abstract
The invention discloses a quantum dot backlight source and a vehicle-mounted display screen with the same, wherein the quantum dot backlight source comprises a bottom shell, a backlight assembly and a face frame, wherein the bottom shell comprises a bottom wall and a side wall, and an accommodating groove is defined between the bottom wall and the side wall; the backlight assembly is arranged in the accommodating groove and comprises a light guide plate, a quantum rod and an LED lamp bar, the light guide plate is arranged in the accommodating groove and comprises a light guide body, at least one of the left side and the right side of the light guide body is provided with an expansion edge, and the outer side surface of the expansion edge is provided with an assembly groove; the quantum rod is arranged in the assembly groove, the LED lamp strip comprises a substrate and a plurality of LED lamp beads arranged on the substrate at intervals, the substrate is fixed to the outer side surface of the expansion edge through a fastener, and the LED lamp beads are positioned in the assembly groove and opposite to the quantum rod; the face frame is connected with the bottom shell in a buckling mode so as to tightly press and fix the backlight assembly in the bottom shell. The quantum dot backlight source provided by the embodiment of the invention has more stable and reliable performance, and is particularly suitable for vehicle-mounted display screens.
Description
Technical Field
The invention relates to a display screen, in particular to a quantum dot backlight source and a display screen with the quantum dot backlight source.
Background
Along with the development and the popularization of automobile technology, people experience the requirement on the intelligent control of automobile more and more high, from this, display device's on the automobile screen size is also bigger and bigger to be convenient for realize the degree of depth interaction between user and the automobile, bring better driving experience and scientific and technological experience for the user.
Due to the influence of the driving environment of the automobile, vibration of the automobile, temperature in the automobile and the like can all affect the vehicle-mounted display equipment during driving, and therefore the requirements of the vehicle-mounted display equipment on the aspects of stability, vibration prevention, dust prevention and the like are higher. In the related art, the vehicle-mounted display screen comprises a backlight source and a display panel arranged on the backlight source, wherein the backlight source mainly comprises a bottom plate, a light guide plate, a frame, an LED lamp strip, a quantum rod and the like, the light guide plate is arranged on the bottom plate, the frame is fixed on the bottom plate, the LED lamp strip is arranged on the inner side wall of the frame, the quantum rod is fixed between the LED lamp strip and one side face of the light guide plate, the structure of the backlight source is unstable, after the backlight source is used for a long time, due to factors such as high temperature and vibration in a vehicle, deformation of a bottom shell, a face shell and the like is caused, relative positions of the LED lamp strip, the light guide plate and the quantum rod can possibly change, the backlight effect is further influenced, and the stability and the reliability are poor.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to provide a quantum dot backlight.
Another object of the present invention is to provide a vehicle-mounted display screen.
To achieve the above object, in one aspect, a quantum dot backlight according to an embodiment of the present invention includes:
the bottom shell comprises a bottom wall and a side wall, and an accommodating groove is defined between the bottom wall and the side wall;
the backlight assembly is arranged in the accommodating groove and comprises a light guide plate, a quantum rod and an LED lamp strip, the light guide plate is arranged in the accommodating groove, the light guide plate comprises a light guide body, at least one of the left side and the right side of the light guide body is provided with an expansion edge extending along the front-back direction, the thickness of the expansion edge is larger than that of the light guide body, an assembling groove is arranged on the outer side surface of the expansion edge, and the assembling groove extends along the front-back direction;
the quantum rod is arranged in the assembling groove and extends along the front-back direction;
the LED lamp strip comprises a substrate and a plurality of LED lamp beads arranged on the substrate at intervals, the substrate is fixed to the outer side surface of the expansion edge through a fastener, and the LED lamp beads are located in the assembling grooves and opposite to the quantum rods;
the face frame is connected with the bottom shell in a buckling mode so as to tightly press and fix the backlight assembly in the bottom shell.
According to the quantum dot backlight provided by the embodiment of the invention, the light guide plate comprises a light guide body, at least one of the left side and the right side of the light guide body is provided with an expansion edge extending along the front-back direction, the outer side surface of the expansion edge is provided with an assembly groove, and a quantum rod is arranged in the assembly groove and extends along the front-back direction; the LED lamp strip fastener is fixed to the lateral surface that the expansion was followed, so, form an independent backlight unit, when this kind of independent backlight unit installed in the drain pan, even there is the deformation scheduling problem in the drain pan, however, the position relation between LED lamp strip, the quantum stick can not change, and then makes backlight effect not influenced basically, that is to say, can ensure that the stable performance of backlight is reliable, in addition, this kind of backlight unit's dustproof effect is also better.
In addition, the quantum dot backlight source according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the lower surface of the light guide body abuts against the bottom wall, the bottom wall is provided with a concave groove adapted to the expansion edge, and the expansion edge is accommodated in the concave groove.
According to an embodiment of the present invention, a corner in the bottom chassis has an L-shaped corner platform, the L-shaped corner platform includes a first side barrier portion and a second side barrier portion perpendicular to the first side barrier portion, a right-angle groove is formed between the first side barrier portion and the second side wall portion, and a corner of the backlight assembly is positioned in the bottom chassis through the right-angle groove.
According to one embodiment of the invention, the expansion edge comprises a joint part, a first edge blocking part and a second edge blocking part, one side of the joint part is connected with the light guide body, the first edge blocking part and the second edge blocking part are connected with the other side of the joint part, and the first edge blocking part and the second edge blocking part are opposite to each other up and down to define the assembling groove;
the fastener is a screw, threaded holes are formed in the first edge blocking portion and the second edge blocking portion, through holes are formed in the substrate, and the screw penetrates through the through holes to be in threaded connection with the threaded holes.
According to one embodiment of the invention, the upper surface and the lower surface of the extension edge are provided with a reflecting layer for reflecting light rays of the LED light bar.
According to an embodiment of the present invention, the engaging portion has a trapezoidal shape in a cross section perpendicular to the anteroposterior direction, and the thickness of the one side of the engaging portion is smaller than the thickness of the other side of the engaging portion.
According to one embodiment of the present invention, the side walls include two first side walls opposing in the left-right direction, and a gap is provided between the base plate and the adjacent first side wall, and a heat dissipation fin is interposed in the gap.
According to an embodiment of the present invention, the side wall further includes two second side walls opposing in the front-rear direction;
the face frame has the relative back-off that keeps off along and neighbouring fender edge in the front and back direction, keep off along downwardly extending and backstop in the second lateral wall is inboard, be equipped with on the second lateral wall with the card hole of back-off looks lock.
According to an embodiment of the present invention, the bottom wall is further provided with a heat dissipation plate, a liquid channel is arranged in the heat dissipation plate, and a cooling medium is arranged in the liquid channel.
On the other hand, the vehicle-mounted display screen provided by the embodiment of the invention is provided with the quantum dot backlight source.
According to the vehicle-mounted display screen provided by the embodiment of the invention, the quantum dot backlight source is arranged, the light guide plate comprises a light guide body, at least one of the left side and the right side of the light guide body is provided with an expansion edge extending along the front-back direction, the outer side surface of the expansion edge is provided with an assembly groove, and the quantum rod is arranged in the assembly groove and extends along the front-back direction; the LED lamp strip fastener is fixed to the lateral surface that the expansion was followed, so, form an independent backlight unit, when this kind of independent backlight unit installed in the drain pan, even there is the deformation scheduling problem in the drain pan, however, the position relation between LED lamp strip, the quantum stick can not change, and then makes backlight effect not influenced basically, that is to say, can ensure that the stable performance of backlight is reliable, in addition, this kind of backlight unit's dustproof effect is also better.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a quantum dot backlight according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken at B-B of FIG. 1;
FIG. 4 is an exploded view of a quantum dot backlight according to an embodiment of the invention;
FIG. 5 is an exploded view of a backlight assembly in a quantum dot backlight according to an embodiment of the invention;
FIG. 6 is a schematic structural diagram of a bottom chassis in a quantum dot backlight according to an embodiment of the invention;
fig. 7 is a schematic structural diagram of a middle frame of a quantum dot backlight source according to an embodiment of the invention.
Reference numerals:
a bottom case 10;
a bottom wall 101;
a first side wall 102;
a second sidewall 103;
a chucking hole 1031;
a housing groove H10;
an L-shaped corner stand 104;
a first side barrier 1041;
a second side stop 1042;
right-angle slots 1043;
a heat sink 11;
a heat dissipation plate 12;
a liquid passage 121;
a backlight assembly 20;
a light guide plate 201;
a light guide body 2011;
the expansion edge 2012;
the engaging portion 2012 a;
the first rim part 2012 b;
a second collar portion 2012 c;
a threaded hole 2012 d;
a quantum rod 202;
an LED light bar 203;
a substrate 2031;
an LED lamp bead 2032;
a reflective layer 204;
a face frame 30;
a retaining edge 301;
an inverted button 302;
a reflection plate 40;
an optical film 50;
a brightness enhancement film 501;
a diffuse reflection film 502;
a polarizing film 503.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one skilled in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of protection of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The quantum dot backlight according to an embodiment of the present invention is described in detail below with reference to the drawings.
Referring to fig. 1 to 7, the quantum dot backlight according to the embodiment of the invention includes a bottom chassis 10, a backlight assembly 20, and a bezel 30.
Specifically, the bottom case 10 includes a bottom wall 101 and a side wall, and a receiving groove H10 is defined between the bottom wall 101 and the side wall. The backlight assembly 20 is disposed in the receiving groove H10, and the face frame 30 is connected to the bottom case 10 by a snap fit, so as to press and fix the backlight assembly 20 in the bottom case 10.
That is, the backlight assembly 20 mainly includes the light guide plate 201, the quantum rod 202 and the LED light bar 203, the left side surface and/or the right side surface of the light guide plate 201 is provided with an expansion edge 2012, the expansion edge 2012 extends in the front-back direction, preferably, the length of the expansion edge 2012 is equal to the length of the light guide plate 201 in the front-back direction, the outer side surface of the expansion edge 2012 is provided with a mounting groove extending in the front-back direction, and the quantum rod 202 is mounted in the mounting groove and extends in the same direction as the expansion edge 2012. And LED lamp strip 203 is mainly by base plate 2031 and a plurality of LED lamp pearl 2032, and base plate 2031 passes through the fastener to be fixed at the expansion along the lateral surface of 2012, and a plurality of LED lamp pearl 2032 are arranged at interval in proper order along the back and forth direction and are established on base plate 2031 towards the expansion along the side of 2012, and LED lamp pearl 2032 is located the assembly groove and relative about with quantum rod 202, and the light that LED lamp pearl 2032 sent carries out the light turn back through quantum rod 202 and jets into to light guide plate 201.
It should be noted that, unlike the backlight in the prior art, the quantum dot backlight provided in the present embodiment includes a light guide plate 201, a quantum rod 202, and an LED light bar 203, which form an independent backlight assembly 20, and in the backlight assembly 20, the light guide plate 201, the quantum rod 202, and the LED light bar 203 are fixed relatively and integrated.
It can be understood that the quantum dot backlight source may further include a reflection plate 40 and an optical film 50, the reflection plate 40 is disposed between the light guide plate 201 and the bottom wall 101, the optical film 50 is disposed above the light guide plate 201, the light entering the light guide plate 201 is reflected to the light guide plate 201 through the reflection plate 40, and then is emitted from the light guide plate 201 to the optical film 50, and is emitted after being optically processed through the optical film 50, wherein the optical film 50 may include a brightness enhancement film 501, a diffuse reflection film 502 and a polarization film 503, which are stacked, and after being optically processed through the brightness enhancement film 501, the diffuse reflection film 502 and the polarization film 503, a better optical effect may be achieved.
According to the quantum dot backlight provided by the embodiment of the invention, the light guide plate 201 comprises a light guide body 2011, at least one side of the left side and the right side of the light guide body 2011 is provided with an expansion edge 2012 extending along the front-back direction, the outer side surface of the expansion edge 2012 is provided with an assembly groove, and the quantum rod 202 is arranged in the assembly groove and extends along the front-back direction; the fastening of the LED light bar 203 is fixed to the outer side surface of the expanding edge 2012, so as to form an independent backlight assembly 20, when the independent backlight assembly 20 is installed in the bottom case 10, even if the bottom case 10 has problems such as deformation, the positional relationship between the LED light bar 203 and the quantum rod 202 is not changed, and further the backlight effect is not substantially affected, that is, the backlight performance can be ensured to be stable and reliable, and in addition, the dustproof effect of the backlight assembly 20 is better.
Referring to fig. 2 and 3, in an embodiment of the present invention, a lower surface of the light guide body 2011 abuts against the bottom wall 101, the bottom wall 101 is provided with a concave groove adapted to the expansion edge 2012, and the expansion edge 2012 is received in the concave groove.
That is to say, when the light guide plate 201 is installed in the receiving groove H10 of the bottom case 10, the light guide body 2011 of the light guide plate 201 is attached to the bottom wall 101 of the bottom case 10, and the expanding edge 2012 of the light guide plate 201 is received in the recessed groove of the bottom wall 101, so that the light guide plate 201 is more stable and reliable in the bottom case 10.
Further, an L-shaped corner platform 104 is disposed at a corner in the bottom case 10, the L-shaped corner platform 104 includes a first side blocking portion 1041 and a second side blocking portion 1042 perpendicular to the first side blocking portion 1041, a right-angle groove 1043 is formed between the first side blocking portion 1041 and the second side wall 103, and a corner of the backlight assembly 20 is positioned in the bottom case 10 through the right-angle groove 1043.
That is to say, four corners in bottom shell 10 form an L type corner platform 104 respectively, form right-angle groove 1043 on the L type corner platform 104, when the equipment, establish backlight unit 20 in bottom shell 10, utilize right-angle groove 1043 to fix a position four corners of backlight unit 20, promptly, four corners of backlight unit 20 are blocked respectively and are established in four right-angle grooves 1043, so, make things convenient for in the equipment of backlight unit 20, simultaneously, can ensure that backlight unit 20 and bottom shell 10 assemble the back, the structure is more firm and more reliable.
Referring to fig. 2 and 5, in an embodiment of the invention, the expansion edge 2012 includes a connection portion 2012a, a first rib portion 2012b and a second rib portion 2012c, one side of the connection portion 2012a is connected to the light guide body 2011, the first rib portion 2012b and the second rib portion 2012c are connected to the other side of the connection portion 2012a, and the first rib portion 2012b and the second rib portion 2012c are opposite to each other in a vertical direction to define the assembly groove. The fastening piece is a screw, threaded holes 2012d are formed in the first retaining edge portion 2012b and the second retaining edge portion 2012c, a through hole is formed in the substrate 2031, and the screw penetrates through the through hole and is in threaded connection with the threaded holes 2012 d.
That is, the expansion edge 2012 is connected by the connecting portion 2012a, the first flange portion 2012b and the second flange portion 2012c to form a substantially U-shaped structure, the quantum rod 202 is installed in the assembling groove, and the LED light bar 203 is fixed to the outer side surface of the expansion edge 2012 by screws. During assembly, the quantum rod 202 is installed in the assembly groove, and then the screw passes through the through hole in the substrate 2031 and is in threaded connection with the threaded hole 2012d in the first flange 2012b and the second flange 2012c, so that the backlight assembly 20 can be assembled.
Advantageously, the upper surface and the lower surface of the extended edge are provided with a reflective layer 204 for reflecting light of the LED light bar 203, for example, the reflective layer 204 may include a reflective sheet and a reflective coating coated on the lower surface of the reflective sheet, the reflective sheet is adhered on the surface of the extended edge 2012 and may be formed of a plastic material, such as polyethylene terephthalate (PET), Polycarbonate (PC) and Polystyrene (PS), and the reflective coating may be made of silver, titanium dioxide, or the like, so as to increase light reflectivity.
Like this, the light that LED lamp strip 203 sent, some light directive reflection layer 204 through the reflection of reflection layer 204 back, with in the light reflection meeting light guide plate 201, so, on the one hand, can prevent that light from following the expansion and following 2012 and jet out and the light leak phenomenon that causes, on the other hand can improve light utilization.
Alternatively, the cross section of the engagement portion 2012a perpendicular to the anteroposterior direction is trapezoidal, and the thickness of the one side of the engagement portion 2012a is smaller than the thickness of the other side of the engagement portion 2012 a. So, the intensity of the junction between joint portion 2012a and the light guide body 2011 is the gradual change, and then makes the difficult fracture of junction, improves the reliability of structure.
Referring to fig. 2, 4 and 6, in an embodiment of the present invention, the side walls include two first side walls 102 opposite to each other in the left-right direction, and a gap is provided between the substrate 2031 and the adjacent first side walls 102, and the heat dissipation fins 11 are interposed in the gap. Therefore, the heat of the LED light bar 203 can be conducted to the bottom case 10 by the heat dissipation plate 11, so as to improve the heat dissipation effect and ensure more stable working performance.
It is understood that the heat sink 11 may be made of a metal material with a high thermal conductivity, such as aluminum, copper, etc.
Referring to fig. 3, 4 and 7, in one embodiment of the present invention, the side wall further includes two second side walls 103 opposite in the front-rear direction; the face frame 30 has a blocking edge 301 opposite to each other in the front-back direction and an inverted buckle 302 adjacent to the blocking edge 301, the blocking edge 301 extends downward and blocks the inner side of the second sidewall 103, and the second sidewall 103 is provided with a clamping hole 1031 buckled with the inverted buckle 302.
That is to say, the surface frame 30 and the bottom case 10 are connected by the snap fit through the matching of the inverse buckle 302 and the snap fit hole 1031, the connection and the disassembly are convenient, the assembly is convenient, and in addition, the blocking edge 301 is stopped at the inner side of the second sidewall 103 of the bottom case 10, so that the connection between the surface frame 30 and the bottom case 10 is more stable and reliable.
In an embodiment of the present invention, the bottom wall 101 is further provided with a heat dissipation plate 12, a liquid channel 121 is provided in the heat dissipation plate 12, a cooling medium is provided in the liquid channel 121, in the example shown in fig. 1, a mounting groove is provided on the bottom surface of the bottom wall 101, the heat dissipation plate 12 is attached in the mounting groove, and the cooling medium may be water, acetone, methanol, ethylene glycol, thermoconducting metal, or the like.
When the display device including the quantum dot backlight is applied to an automobile, the temperature of the internal environment of the automobile is very high during use, which may cause thermal expansion of the light guide plate 201, the face frame 30, the bottom case 10 and other components in the quantum backlight, and cause problems of unstable performance, low reliability and the like.
In this embodiment, by providing the heat dissipation plate 12 on the bottom case 10, the heat conducted to the bottom case 10 can be quickly absorbed by the heat dissipation plate 12 and the cooling medium inside the heat dissipation plate 12, and in the specific application, when the display device including the quantum dot backlight is mounted on a vehicle body or other carriers, a fan is provided in the vehicle body or other carriers, and blows air to the heat dissipation plate 12, so that the heat dissipation plate 12 can be cooled by air, the heat dissipation effect is further improved, and the quantum dot backlight is ensured to have better stability and reliability.
The vehicle-mounted display screen provided by the embodiment of the invention is provided with the quantum dot backlight source.
According to the vehicle-mounted display screen provided by the embodiment of the invention, with the quantum dot backlight source, the light guide plate 201 comprises a light guide body 2011, at least one side of the left side and the right side of the light guide body 2011 is provided with an expansion edge 2012 extending along the front-back direction, the outer side surface of the expansion edge 2012 is provided with an assembly groove, and the quantum rod 202 is arranged in the assembly groove and extends along the front-back direction; the fastening of the LED light bar 203 is fixed to the outer side surface of the expanding edge 2012, so as to form an independent backlight assembly 20, when the independent backlight assembly 20 is installed in the bottom case 10, even if the bottom case 10 has problems such as deformation, the positional relationship between the LED light bar 203 and the quantum rod 202 is not changed, and further the backlight effect is not substantially affected, that is, the backlight performance can be ensured to be stable and reliable, and in addition, the dustproof effect of the backlight assembly 20 is better.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A quantum dot backlight, comprising:
the bottom shell comprises a bottom wall and a side wall, and an accommodating groove is defined between the bottom wall and the side wall;
the backlight assembly is arranged in the accommodating groove and comprises a light guide plate, a quantum rod and an LED lamp bar, the light guide plate is arranged in the accommodating groove, the light guide plate comprises a light guide body, at least one of the left side and the right side of the light guide body is provided with an expansion edge extending along the front-back direction, the thickness of the expansion edge is larger than that of the light guide body, an assembling groove is arranged on the outer side surface of the expansion edge, the assembling groove extends along the front-back direction, and the upper surface and the lower surface of the expansion edge are provided with reflecting layers for reflecting the light of the LED lamp bar; the quantum rod is arranged in the assembling groove and extends along the front-back direction; the LED lamp strip comprises a substrate and a plurality of LED lamp beads arranged on the substrate at intervals, the substrate is fixed to the outer side surface of the expansion edge through a fastener, and the LED lamp beads are located in the assembling grooves and opposite to the quantum rods;
the face frame is in buckled connection with the bottom shell so as to tightly press and fix the backlight assembly in the bottom shell;
the expansion edge comprises a joint part, a first edge retaining part and a second edge retaining part, one side of the joint part is connected with the light guide body, the first edge retaining part and the second edge retaining part are connected to the other side of the joint part, and the first edge retaining part and the second edge retaining part are opposite up and down to limit the assembly groove;
the fastening piece is a screw, threaded holes are formed in the first edge retaining portion and the second edge retaining portion, a through hole is formed in the substrate, and the screw penetrates through the through hole and is in threaded connection with the threaded holes;
the section of the joint part perpendicular to the front-back direction is trapezoidal, and the thickness of one side of the joint part is smaller than that of the other side of the joint part.
2. The quantum dot backlight source of claim 1, wherein the lower surface of the light guide body abuts against the bottom wall, the bottom wall is provided with a concave groove matched with the expansion edge, and the expansion edge is accommodated in the concave groove.
3. The quantum dot backlight source of claim 1, wherein a corner inside the bottom case has an L-shaped corner platform, the L-shaped corner platform comprises a first side barrier portion and a second side barrier portion perpendicular to the first side barrier portion, a right-angle groove is formed between the first side barrier portion and the second side wall portion, and a corner of the backlight assembly is positioned inside the bottom case through the right-angle groove.
4. The quantum dot backlight source of claim 1, wherein the side walls comprise two first side walls opposite to each other in the left-right direction, and a gap is provided between the substrate and the adjacent first side wall, and a heat sink is interposed in the gap.
5. The quantum dot backlight of claim 1, wherein the sidewalls further comprise two second sidewalls opposing in a front-to-back direction;
the face frame has the relative back-off that keeps off along and neighbouring fender edge in the front and back direction, keep off along downwardly extending and backstop in the second lateral wall is inboard, be equipped with on the second lateral wall with the card hole of back-off looks lock.
6. The quantum dot backlight source of claim 1, wherein the bottom wall is further provided with a heat dissipation plate, a liquid channel is arranged in the heat dissipation plate, and a cooling medium is arranged in the liquid channel.
7. An in-vehicle display screen, characterized by having the quantum dot backlight source of any one of claims 1 to 6.
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| CN201910386071.2A CN110211488B (en) | 2019-05-09 | 2019-05-09 | Quantum dot backlight and vehicle-mounted display screen with same |
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| CN201910386071.2A CN110211488B (en) | 2019-05-09 | 2019-05-09 | Quantum dot backlight and vehicle-mounted display screen with same |
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Citations (15)
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| CN110211488A (en) | 2019-09-06 |
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