CN214704246U - Backlight module and liquid crystal display screen - Google Patents

Abstract

The utility model provides a backlight module and liquid crystal display. The utility model discloses a backlight module, which comprises a bottom shell, a heat conducting piece, a light source and a light guide plate; the drain pan has the installation cavity, and the heat-conducting piece is connected with the lateral wall of installation cavity, and the heat-conducting piece has elasticity, and the light source is connected with the heat-conducting piece, and the heat-conducting piece is located between light source and the installation cavity lateral wall, and the bottom surface of light guide plate is connected with the diapire of installation cavity, and the light source is located the lateral part of light guide plate, and the luminous side of light source is towards the light guide plate. The utility model discloses a liquid crystal display includes above-mentioned backlight unit. The backlight module of the utility model has good heat dissipation effect of the light source, and the light source is little damaged after the light guide plate expands; the utility model discloses a liquid crystal display life is longer.

Description

Backlight module and liquid crystal display screen

Technical Field

The utility model relates to a LCD technical field especially relates to a backlight unit and liquid crystal display.

Background

A side-in backlight type lcd is a common display screen, and a light bar is disposed at a side of a light guide plate. When the liquid crystal display screen operates, the lamp strip and the light guide plate can generate more heat. Some current display screens, the heat that its lamp strip produced can't scatter and disappear to the external environment fast in, and the light guide plate thermal expansion back, the lamp pearl on the lamp strip can be extruded to the side of light guide plate, causes the damage of lamp strip.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a backlight module, the radiating effect of light source is good, and the damage to the light source is little after the light guide plate inflation.

The utility model discloses still provide a liquid crystal display who has above-mentioned backlight unit.

According to the utility model discloses a backlight module of first aspect embodiment includes: a bottom shell having a mounting cavity; the heat conduction piece is connected with the side wall of the mounting cavity and has elasticity; the light source is connected with the heat conducting piece, the heat conducting piece is positioned between the light source and the side wall of the mounting cavity, and heat generated by the light source can be transferred to the bottom shell through the heat conducting piece; the bottom surface of the light guide plate is connected with the bottom wall of the installation cavity, the light source is located on the side portion of the light guide plate, the light emitting side of the light source faces the light guide plate, and the light guide plate is used for reflecting light rays of the light source.

According to the utility model discloses backlight unit has following beneficial effect at least: when the backlight module operates, heat generated by the light source can be transferred to the bottom shell through the heat conducting piece, and the part of heat can be finally transferred to the air from the bottom shell, so that the heat dissipation of the light source is realized. Under the long-time irradiation of light, the temperature of the light guide plate rises and expands, and the edge of the side part of the light guide plate can be extruded to the light source; because the heat conducting piece is arranged between the light source and the bottom shell and has elasticity, when the light source is extruded by the light guide plate, the heat conducting piece can be compressed, and the light source has certain buffering and displacement space, so that the light source is not directly crushed under the rigid clamping of the light guide plate and the bottom shell. Therefore, the utility model provides a backlight module, the light source radiating efficiency is high, and the damage to the light source is little after the light guide plate inflation simultaneously.

According to some embodiments of the invention, the thickness of the heat conducting member is 0.8mm to 1.5 mm.

According to some embodiments of the utility model, the light source includes base plate and lamp pearl, the base plate includes first installation wall and second installation wall, first installation wall with second installation wall sets up back to back each other, first installation wall with the heat-conducting member is connected, second installation wall with the lamp pearl is connected.

According to some embodiments of the utility model, the light source still includes the stopper, the stopper with the second installation wall is connected, the stopper with the lamp pearl homogeneous phase is for the second installation wall is convex, just the protrusion distance of stopper is greater than the protrusion distance of lamp pearl.

According to some embodiments of the utility model, the drain pan includes main part and edge part, the main part with the light guide plate is connected, the edge part with the outer edge of main part is connected, the edge part for the main part is towards keeping away from the direction protrusion of installation cavity, so that the inboard of edge part forms the storage tank, the storage tank with the installation cavity intercommunication, some holding of light source is in the storage tank.

According to the utility model discloses a liquid crystal display of second aspect embodiment, include the backlight unit as above-mentioned embodiment.

According to the utility model discloses liquid crystal display has following beneficial effect at least: the service life is longer.

According to some embodiments of the utility model, liquid crystal display still includes: the liquid crystal glass is arranged above the backlight module; the first frame piece is connected with the bottom shell, the first frame piece can support the liquid crystal glass from the bottom surface of the liquid crystal glass, and the first frame piece can limit the top surface of the light guide plate; and the second frame piece is connected with the bottom shell and can limit the top surface of the liquid crystal glass.

According to some embodiments of the utility model, the drain pan has the first joint body, the first joint position in the lateral part of drain pan, the first joint body is convex outwards, first frame has first joint hole, first joint hole site in the lateral part of first frame, the first joint body can block into in the first joint hole.

According to some embodiments of the present invention, the bottom case has a second clip body and a second clip hole, the second clip body is located at a side portion of the bottom case, the second clip hole is located at a side portion of the bottom case, the second clip body protrudes outward, the second clip hole is adjacent to the second clip body, and the second clip hole is located below the second clip body; the second frame piece is provided with a third clamping body and a third clamping hole, the third clamping body is positioned on the side part of the second frame piece, the third clamping hole is formed in the side part of the second frame piece, the third clamping body protrudes inwards, the third clamping hole is adjacent to the third clamping body, and the third clamping hole is positioned above the third clamping body; the second clamping body can be clamped into the third clamping hole, and the third clamping body can be clamped into the second clamping hole.

According to some embodiments of the utility model, first frame has dodges the breach, dodge the breach and be located the lateral part of first frame, the second joint body can the holding be in dodge in the breach.

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

The invention will be further described with reference to the following drawings and examples, in which:

fig. 1 is an exploded view of the liquid crystal display panel of the present invention;

FIG. 2 is a top view of a liquid crystal display panel;

FIG. 3 is a cross-sectional view of the liquid crystal display panel of FIG. 2 taken along section A-A;

FIG. 4 is an enlarged view of area B of FIG. 3;

FIG. 5 is an enlarged view of area C of FIG. 3;

FIG. 6 is a partial schematic view of the bottom case of FIG. 3;

FIG. 7 is a partial schematic view of a light source in some embodiments;

FIG. 8 is a schematic view of the bottom shell, the first frame member and the second frame member assembled together in accordance with certain embodiments;

FIG. 9 is an enlarged view of area D of FIG. 8;

FIG. 10 is an enlarged view of area E of FIG. 8;

fig. 11 is an enlarged schematic view of region F in fig. 8.

Reference numerals: 101-a second frame member, 102-liquid crystal glass, 103-a first frame member, 104-an upper diffusion sheet, 105-a prism sheet, 106-a lower diffusion sheet, 107-a light guide plate, 108-a reflection sheet, 109-a bottom shell, 110-a light source, 111-a heat conduction member, 112-a first limiting body, 113-a second limiting body, 114-a third limiting body, 601-a main body part, 602-an edge part, 603-an accommodating groove, 604-an installation cavity, 701-a substrate, 702-a lamp bead, 703-a limiting block, 801-a first clamping body, 802-a second clamping body, 803-a second clamping hole, 901-a first clamping hole, 902-an avoidance notch, 1001-a third clamping body and 1002-a third clamping hole.

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 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 only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood not to include the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means 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 present invention. In this specification, the schematic representations of the terms used above do not necessarily 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.

Referring to fig. 1 to 6, the present invention provides a backlight module including a bottom case 109, a light source 110, a heat conducting member 111 and a light guide plate 107. Referring to fig. 4 and 6, the bottom chassis 109 has a mounting cavity 604, the heat conductive member 111 is connected to a sidewall of the mounting cavity 604, a bottom surface of the light guide plate 107 is connected to a bottom wall of the mounting cavity 604, and the light source 110 is connected to the heat conductive member 111. The heat conducting member 111 has elasticity, and the heat conducting member 111 has better heat conducting capability, and can transfer heat generated by the light source 110 to the bottom case 109; the heat conducting piece 111 specifically can be set up to the silica gel material, and under the condition that light source 110 set up to the lamp strip, the heat conducting piece specifically can set up to the silica gel strip. Referring to fig. 4, the light source 110 is located at a side portion of the light guide plate 107, a light emitting side of the light source 110 faces the light guide plate 107, and light emitted from the light source 110 enters from the side portion of the light guide plate 107, and is reflected by the light guide plate 107 and then exits from a top portion of the light guide plate 107. It should be noted that the connection between the light guide plate 107 and the bottom case 109, the connection between the heat conducting member 111 and the light source 110, and the connection between the heat conducting member 111 and the bottom case 109 may be achieved by adhesion.

When the backlight module operates, heat generated by the light source 110 is transferred to the bottom case 109 through the heat conducting member 111, and the heat is finally transferred from the bottom case 109 to the air, so that heat dissipation of the light source 110 is realized. Under the long-time irradiation of light, the temperature of the light guide plate 107 itself rises and expands, and the side edges of the light guide plate 107 are pressed against the light source 110; because the heat conducting member 111 is disposed between the light source 110 and the bottom casing 109 and the heat conducting member 111 has elasticity, when the light source 110 is pressed by the light guide plate 107, the heat conducting member 111 is compressed, and the light source 110 has a certain buffering and displacement space, so as not to be directly crushed by the rigid clamping of the light guide plate 107 and the bottom casing 109. Therefore, the utility model provides a backlight module, light source 110 radiating efficiency is high, and the damage to light source 110 is little after the light guide plate 107 inflation simultaneously.

Specifically, the thickness of the heat-conducting member 111 may be 0.8mm to 1.5mm (the thickness direction of the heat-conducting member 111 may refer to fig. 4) to ensure that the light source 110 has a sufficient buffer space. If the thickness of the heat conducting member 111 is less than 0.8mm, the self-compression amount of the heat conducting member 111 is limited, and the buffer space of the light source 110 is insufficient when being squeezed by the light guide plate 107; if the thickness of the heat conducting member 111 is greater than 1.5mm, the heat dissipation efficiency of the light source 110 is low, and the excessive thickness of the heat conducting member 111 may also affect the size of the backlight module or the liquid crystal display, which is not favorable for realizing the lightness and thinness of the backlight module or the liquid crystal display.

Referring to fig. 4 to 6, the backlight module further includes a reflective sheet 108, a bottom surface of the reflective sheet 108 is connected to the bottom wall of the mounting cavity 604, and a top surface of the reflective sheet 108 is connected to the bottom surface of the light guide plate 107. A part of the light emitted from the light source 110 is emitted from the bottom of the light guide plate 107, and the reflective sheet 108 can reflect the light emitted from the bottom of the light guide plate 107 and emit the light from the top of the light guide plate 107, so as to ensure the illumination brightness of the backlight module. The backlight module further includes a prism sheet 105, an upper diffusion sheet 104 and a lower diffusion sheet 106, the lower diffusion sheet 106 is attached to the top of the light guide plate 107, the prism sheet 105 is attached to the top of the lower diffusion sheet 106, and the upper diffusion sheet 104 is attached to the top of the prism sheet 105. The upper diffusion sheet 104 and the lower diffusion sheet 106 are used for realizing optical diffusion, the lower diffusion sheet 106 mainly projects the light emitted from the light guide plate 107 uniformly onto the prism sheet 105, and the upper diffusion sheet 104 mainly projects the light emitted from the prism sheet 105 uniformly onto the liquid crystal glass 102 module; the prism sheet 105 is used to increase the front brightness of the backlight module. The specific structures and optical principles of the upper diffusion sheet 104, the lower diffusion sheet 106, the prism sheet 105, the reflective sheet 108, and the light guide plate 107 are well known in the art and will not be described in detail herein.

Referring to fig. 7, the light source 110 includes a substrate 701 and a lamp bead 702 (the lamp bead 702 may specifically be an LED light emitting chip), the substrate 701 includes a first mounting wall and a second mounting wall, the first mounting wall and the second mounting wall are arranged opposite to each other, if fig. 7 is taken as an example, a rear side wall of the substrate 701 is the first mounting wall, and a rear side wall of the substrate 701 is the second mounting wall; the first mounting wall is connected to the heat conducting member 111, and the second mounting wall is connected to the lamp bead 702. This is a relatively simple arrangement of the light source 110. In some embodiments, the light source 110 further includes a stopper 703, the stopper 703 is connected to the second mounting wall, both the stopper 703 and the bead 702 are protruded relative to the second mounting wall, and the protrusion distance of the stopper 703 is greater than the protrusion distance of the bead 702. The protruding distance of the stopper 703 refers to the distance between the protruding end of the stopper 703 and the second mounting wall; similarly, the protrusion distance of the lamp bead 702 refers to the distance between the protrusion end of the lamp bead 702 and the second installation wall. The protrusion distance of the limiting block 703 is greater than the protrusion distance of the lamp bead 702, which means that after the light guide plate 107 expands, the side of the light guide plate 107 preferentially contacts the limiting block 703, the light source 110 is squeezed under the condition that the limiting block 703 contacts the light guide sheet, and the expanded light guide plate 107 does not contact the lamp bead 702. The arrangement of the limiting block 703 is beneficial to reducing the damage of the light guide plate 107 to the lamp bead 702.

Referring to fig. 6, the bottom chassis 109 includes a main body 601 and an edge portion 602, the edge portion 602 is connected to an outer edge of the main body 601, the edge portion 602 protrudes away from the mounting cavity 604, so that an accommodating groove 603 is formed on an inner side of the edge portion 602, the accommodating groove 603 communicates with the mounting cavity 604, the light guide plate 107 is connected to the main body 601, and a portion of the light source 110 is accommodated in the accommodating groove 603. Referring to fig. 6 and 7, the arrangement is mainly to make the lamp bead 702 opposite to the side of the light guide plate 107, so as to ensure the optical effect of the backlight module; moreover, the lamp beads 702 are opposite to the side part of the light guide plate 107 by using the mode, a base plate is not required to be additionally arranged at the bottom of the light guide plate 107, and the structural complexity of the backlight module can be avoided being increased.

The utility model also provides a liquid crystal display, liquid crystal display include like above-mentioned embodiment backlight unit, because backlight unit's light source 110 radiating effect is good and light source 110 is difficult impaired, this liquid crystal display life is longer.

Specifically, referring to fig. 1, 4 and 5, in some embodiments, the liquid crystal display panel further includes a liquid crystal glass 102, a first frame member 103 and a second frame member 101, and the first frame member 103 and the second frame member 101 are both connected to the bottom chassis 109. After the liquid crystal display screen is assembled, the liquid crystal glass 102 is positioned above the backlight module, and light provided by the backlight module is emitted to the liquid crystal glass 102; the first frame member 103 can limit the top surface of the light guide plate 107, the first frame member 103 can support the liquid crystal glass 102 from the bottom surface of the liquid crystal glass 102, and the second frame member 101 can limit the top surface of the liquid crystal glass 102.

Referring to fig. 4, the first frame member 103 includes a first position-limiting body 112 and a second position-limiting body 113, the first position-limiting body 112 extends toward the center of the first frame member 103, the second position-limiting body 113 is connected to the bottom of the first position-limiting body 112, and the second position-limiting body 113 protrudes downward. The protruding end of the second position-limiting body 113 faces the edge of the light guide plate 107, and the second position-limiting body 113 can directly block the light guide plate 107 from moving upwards so as to limit the light guide plate 107; in addition, the prism sheet 105, the upper diffusion sheet 104 and the lower diffusion sheet 106 are blocked by the side of the second position-limiting body 113. The prism sheet 105, the upper diffusion sheet 104 and the lower diffusion sheet 106 are obstructed from moving upward by the bottom surface of the first position-limiting body 112, and since the light guide plate 107 is attached to the lower diffusion sheet 106, the first position-limiting body 112 actually obstructs the upward movement of the light guide plate 107, that is, the first position-limiting body 112 also restricts the top surface of the light guide plate 107.

Referring to fig. 4, the second frame member 101 includes a third stopper 114, and a gap is provided between the third stopper 114 and the first stopper 112, and the edge portion 602 of the liquid crystal glass 102 is accommodated in the gap; the top surface of the first stopper 112 can support the bottom of the liquid crystal glass 102, the third stopper 114 covers the edge region of the liquid crystal glass 102, and the third stopper 114 can prevent the liquid crystal glass 102 from moving upwards, so as to limit the top surface of the liquid crystal glass 102.

In some embodiments, the first frame member 103 and the bottom case 109 and the second frame member 101 and the bottom case 109 can be connected in a clamping manner, and the clamping manner means that the liquid crystal display screen is assembled or disassembled without using connecting parts such as screws, and the liquid crystal display screen is more convenient to disassemble and assemble. Some simpler snap-in structures that can be applied to the liquid crystal display are described below.

Referring to fig. 9 and 10, the bottom case 109 has a first clamping body 801, the first frame 103 has a first clamping hole 901, the first clamping body 801 is located on a side portion of the bottom case 109, the first clamping body 801 protrudes outward, and the first clamping body 801 can be clamped into the first clamping hole 901. The wall surface of the first clip hole 901 can block the first clip body 801 from moving, so that the bottom case 109 and the first frame 103 are prevented from being separated from each other, and the bottom case 109 and the first frame 103 are connected. For the bottom case 109, the direction away from the mounting cavity 604 of the bottom case 109 is "outside", and the direction close to the mounting cavity 604 is "inside"; fig. 9 shows the first clamping body 801 located at the front side of the bottom shell 109, and correspondingly, with the direction of fig. 9 as a reference, the first clamping body 801 protrudes outward to protrude forward.

Referring to fig. 9 and 11, the bottom chassis 109 further has a second clamping body 802 and a second clamping hole 803, the second clamping body 802 is located on a side portion of the bottom chassis 109, the second clamping body 802 protrudes outwards, and the second clamping hole 803 is opened on the side portion of the bottom chassis 109; the second clamping hole 803 is adjacent to the second clamping body 802, and the second clamping hole 803 is located below the second clamping body 802. The second frame 101 has a third engaging body 1001 and a third engaging hole 1002, the third engaging body 1001 is located on the side of the second frame 101, the third engaging body 1001 protrudes inward, and the third engaging body 1001 is opened on the side of the second frame 101; the third engaging body 1001 is disposed adjacent to the third engaging hole 1002, and the third engaging hole 1002 is located above the third engaging body 1001. The second card body 802 can be snapped into the third snap hole 1002, and the third card body 1001 can be snapped into the second card hole 803. The wall of third joint hole 1002 and third joint body 1001 can hinder second joint body 802 from moving, and the wall of second joint hole 803 and second joint body 802 can hinder third joint body 1001 from moving to realize the connection of bottom shell 109 and second frame 101. The second frame members 101 are each shaped like a frame, and a space is formed in the center of the second frame member 101, and the direction away from the space is "outward" and the direction close to the space is "inward" for the second frame member 101. The definition of the first frame member 103 as to the inside/outside is similar to that of the second frame member 101 and will not be described in detail here.

In some embodiments, the first frame member 103 further has an avoiding notch 902, the avoiding notch 902 is opened at a side portion of the first frame member 103, an opening of the avoiding notch 902 faces downward, and the second clip body 802 is accommodated in the avoiding notch 902 after the first frame member 103 is connected to the bottom case 109. Because the first frame member 103 is located between the bottom case 109 and the second frame member 101, the avoiding notch 902 is provided to avoid the second clamping body 802, so that the first frame member 103 prevents the clamping between the second frame member 101 and the bottom case 109.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims (10)

1. Backlight unit, its characterized in that includes:

a bottom shell having a mounting cavity;

the heat conduction piece is connected with the side wall of the mounting cavity and has elasticity;

the light source is connected with the heat conducting piece, the heat conducting piece is positioned between the light source and the side wall of the mounting cavity, and heat generated by the light source can be transferred to the bottom shell through the heat conducting piece;

the bottom surface of the light guide plate is connected with the bottom wall of the installation cavity, the light source is located on the side portion of the light guide plate, the light emitting side of the light source faces the light guide plate, and the light guide plate is used for reflecting light rays of the light source.

2. The backlight module as claimed in claim 1, wherein the heat-conducting member has a thickness of 0.8mm to 1.5 mm.

3. The backlight module as claimed in claim 1, wherein the light source comprises a substrate and a lamp bead, the substrate comprises a first mounting wall and a second mounting wall, the first mounting wall and the second mounting wall are opposite to each other, the first mounting wall is connected to the heat conducting member, and the second mounting wall is connected to the lamp bead.

4. The backlight module according to claim 3, wherein the light source further comprises a limiting block, the limiting block is connected with the second mounting wall, the limiting block and the lamp bead are both protruded relative to the second mounting wall, and the protrusion distance of the limiting block is greater than that of the lamp bead.

5. The backlight module according to claim 1, wherein the bottom chassis comprises a main body portion and an edge portion, the main body portion is connected to the light guide plate, the edge portion is connected to an outer edge of the main body portion, the edge portion protrudes relative to the main body portion in a direction away from the mounting cavity, so that an inner side of the edge portion forms a receiving groove, the receiving groove is communicated with the mounting cavity, and a portion of the light source is received in the receiving groove.

6. A liquid crystal display panel comprising the backlight module according to any one of claims 1 to 5.

7. The liquid crystal display panel of claim 6, further comprising:

the liquid crystal glass is arranged above the backlight module;

the first frame piece is connected with the bottom shell, the first frame piece can support the liquid crystal glass from the bottom surface of the liquid crystal glass, and the first frame piece can limit the top surface of the light guide plate;

and the second frame piece is connected with the bottom shell and can limit the top surface of the liquid crystal glass.

8. The liquid crystal display screen of claim 7, wherein the bottom casing has a first clip body, the first clip body is located on a side portion of the bottom casing, the first clip body protrudes outward, the first frame has a first clip hole, the first clip hole is located on a side portion of the first frame, and the first clip body can be clipped into the first clip hole.

9. The liquid crystal display screen according to claim 7, wherein the bottom case has a second engaging body and a second engaging hole, the second engaging body is located at a side portion of the bottom case, the second engaging hole is located at a side portion of the bottom case, the second engaging body protrudes outward, the second engaging hole is adjacent to the second engaging body, and the second engaging hole is located below the second engaging body; the second frame piece is provided with a third clamping body and a third clamping hole, the third clamping body is positioned on the side part of the second frame piece, the third clamping hole is formed in the side part of the second frame piece, the third clamping body protrudes inwards, the third clamping hole is adjacent to the third clamping body, and the third clamping hole is positioned above the third clamping body; the second clamping body can be clamped into the third clamping hole, and the third clamping body can be clamped into the second clamping hole.

10. The lcd panel of claim 9, wherein the first frame member has an avoidance notch at a side portion of the first frame member, and the second engaging member is receivable in the avoidance notch.

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