CN113625487A - Novel Mini-LED quantum dot structure backlight module for liquid crystal display television - Google Patents

Novel Mini-LED quantum dot structure backlight module for liquid crystal display television Download PDF

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Publication number
CN113625487A
CN113625487A CN202110765957.5A CN202110765957A CN113625487A CN 113625487 A CN113625487 A CN 113625487A CN 202110765957 A CN202110765957 A CN 202110765957A CN 113625487 A CN113625487 A CN 113625487A
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frame
led
heat dissipation
block
fixedly connected
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叶嘉峻
宋政译
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • 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
    • G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
    • G02F1/133385—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell with cooling means, e.g. fans
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133628—Illuminating devices with cooling means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements
    • G02F2201/503—Arrangements improving the resistance to shock

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention belongs to the technical field of backlight modules, in particular to a novel Mini-LED (micro-light-emitting diode) quantum dot structure backlight module for a liquid crystal display television, which comprises a shell, a frame, a mounting rack and a heat dissipation module, wherein the frame is provided with a plurality of LED quantum dot structures; the mounting frame is arranged on the inner wall of the shell; frames are arranged on two sides of the mounting rack; the inner side of the mounting rack is fixedly connected with a light guide plate; one side of the light guide plate, which is far away from the mounting rack, is fixedly connected with an optical diaphragm; lamp strips are arranged on the inner side of the mounting rack and on two sides of the light guide plate; according to the invention, through arranging the heat dissipation module, the heat of the LED is dissipated in the air convection inside and outside the shell, so that the LED chip is ensured not to gather a large amount of heat, the forbidden band width is prevented from being narrowed due to the rising of the temperature of the node, the light-emitting wavelength is prevented from being shifted, more invisible light radiation is caused, the brightness of the LED is prevented from being attenuated, the adverse effect on wafer bonding glue and peripheral protection glue due to the overhigh temperature is prevented, the aging speed of the wafer bonding glue and the peripheral protection glue is reduced, the service life of the LED is prolonged, and the use cost is saved.

Description

Novel Mini-LED quantum dot structure backlight module for liquid crystal display television
Technical Field
The invention belongs to the technical field of backlight modules, and particularly relates to a novel Mini-LED quantum dot structure backlight module for a liquid crystal display television.
Background
Compared with the traditional LED backlight product, the Mini-LED backlight device breaks through the traditional design thinking, and realizes regional dimming in a smaller range through the dense arrangement of a large number, so that better brightness uniformity and better color contrast can be realized in a smaller light mixing distance, and further the high color rendering of the liquid crystal display television is realized.
Since the lcd panel does not emit light, the backlight module is one of the key components of the lcd because the backlight module needs to provide a light source to normally display images. The backlight module is divided into a side-in type backlight module and a direct type backlight module according to different incident positions of the light source. In the direct type backlight module, a light source such as a cathode fluorescent lamp (CCFL) or a Light Emitting Diode (LED) is disposed behind a liquid crystal panel to directly form a surface light source to provide to the liquid crystal panel. The side-in backlight module is configured to use an LED light bar (Lightbar) disposed at the side rear of the liquid crystal panel as a backlight source. At present, the color gamut level of TFT liquid crystal display devices is generally about 72%, and quantum dot (quantum dot) backlight module technology is developed to further improve the color gamut level. Quantum dot luminescent materials obey quantum size effects, the properties of which vary with the size of the quantum dots. When stimulated by light or electricity, the quantum dots emit colored light, the color of the light is related to the properties of the light, and therefore the light emitted by the quantum dots can be controlled by changing the size of the light. The quantum dot luminescent material has the advantages of concentrated luminescent spectrum, high color purity and the like. The quantum dot light-emitting material is used in the technical field of display, so that the color gamut of the traditional display can be greatly improved, and the color reduction capability of the display is enhanced. The quantum dot backlight module utilizes the characteristic of the quantum dot, utilizes the irradiation of the LED backlight to irradiate the quantum dot layer to excite the color light with different colors, and obtains white light by mixing with the color light partially penetrating through the quantum dot, thereby improving the light emitting effect of the whole backlight module.
For example, a chinese patent with application number CN201910450934.8 discloses a backlight module including a light source, an outer frame and a light guide module. The outer frame comprises a light incident side frame, a first side frame, a second side frame and a third side frame. The light source is arranged on the light incident side frame. The first side frame is opposite to the second side frame and is perpendicular to the light incident side frame respectively. The first side frame and the second side frame are respectively provided with at least one L-shaped groove. The third side frame is opposite to the light incident side frame. The third side frame is provided with at least one positioning elastic sheet. The light guide module is arranged on the inner side of the outer frame. The light guide module is provided with a light guide plate. The light guide plate has a plurality of positioning protrusions on both sides. The positioning convex pieces are respectively clamped with the L-shaped grooves. According to the technical scheme, the positioning elastic sheet directly contacts the light guide plate so that the light guide plate is kept close to the light source. Therefore, the light guide plate of the light guide module can not be easily dislocated along with collision, and the light guide plate is kept aligned with the light source. However, when the LED works, a large amount of heat is generated, and cannot be dissipated in time, so that the junction temperature is increased to narrow the forbidden band width, so that the light-emitting wavelength is shifted, more invisible light radiation is caused, the luminance of the LED is attenuated, and over-high temperature can cause adverse effects on the wafer bonding adhesive and the peripheral protection adhesive, accelerate the aging speed of the wafer bonding adhesive and even possibly cause failure, so that the service life of the LED is shortened, and the heat is not dissipated in time, so that the membrane material on which the LED is placed is prone to generate a mylar phenomenon; for example, when the car-mounted tv on a transportation vehicle in a mountain area is transported on a bumpy road, the backlight module of the lcd tv is easily damaged by vibration, which affects the service life of the lcd tv and causes a lot of economic loss.
Disclosure of Invention
In order to make up for the defects of the prior art, the novel Mini-LED quantum dot structure backlight module for the liquid crystal television provided by the invention solves the problems that a large amount of heat is generated during the working of an LED and cannot be dissipated in time, so that the forbidden band width is narrowed due to the rising of the temperature of a node, the light-emitting wavelength is shifted, more invisible light radiation is caused, the brightness of the LED is attenuated, the wafer bonding glue and the peripheral protection glue are adversely affected due to the overhigh temperature, the aging speed of the LED is accelerated, even the failure is possibly caused, the service life of the LED is shortened, and the Mura phenomenon of a film material on which the LED is placed is easily caused due to the untimely dissipation of the heat; meanwhile, the LCD TV is usually transported for a long distance from production to use, and when the LCD TV is transported on a bumpy road, the backlight module of the LCD TV is easily damaged by vibration, the service life of the LCD TV is influenced, and a great amount of economic loss is caused.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a novel Mini-LED quantum dot structure backlight module for a liquid crystal television, which comprises a shell, a frame, a mounting rack and a heat dissipation module, wherein the frame is arranged on the shell; the mounting frame is arranged on the inner wall of the shell; frames are arranged on two sides of the mounting rack; the inner side of the mounting rack is fixedly connected with a light guide plate; one side of the light guide plate, which is far away from the mounting rack, is fixedly connected with an optical diaphragm; lamp strips are arranged on the inner side of the mounting rack and on two sides of the light guide plate;
the heat dissipation module comprises a heat dissipation block, a groove, a convex block and a heat dissipation port; one sides of the two light bars, which are far away from the light guide plate, are fixedly connected with heat dissipation blocks through heat dissipation adhesive tapes; the two radiating blocks are fixedly connected to the inner side of the mounting frame; grooves are formed in one sides, close to the mounting rack, of the two frames, and heat dissipation silicone grease is filled in the two grooves; the mounting frame is fixedly connected with the lug at the position corresponding to the two grooves; a group of heat dissipation ports are formed in the side face, close to the heat dissipation block, of the shell;
in the prior art, when an LED works, a large amount of heat is generated, the heat cannot be dissipated in time, the junction temperature is increased, the forbidden bandwidth is narrowed, the light-emitting wavelength is deviated, more invisible light radiation is caused, the brightness of the LED is attenuated, the wafer bonding glue and the peripheral protection glue are adversely affected due to overhigh temperature, the aging speed of the LED is accelerated, even the LED can be failed, the service life of the LED is shortened, and the heat cannot be dissipated in time, so that the membrane material on which the LED is placed is easy to generate a mu-La phenomenon; for example, when the vehicle-mounted television on a transport vehicle in a mountain area is transported on a bumpy road, the backlight module of the liquid crystal television is easy to vibrate and damage, the service life of the liquid crystal television is influenced, and a large amount of economic loss is caused;
the invention sets up the heat-dissipating module; the light bar is fixedly connected with the radiating block through the radiating adhesive tape with higher heat conductivity coefficient, the radiating block is made of copper with better heat conductivity, so that the light bar is in close contact with the radiating block, in the working process, the light bar emits light, the scattering direction of the light is guided under the action of the light guide plate, the light is corrected through the optical film to the scattering direction of the light, the uniformity of brightness is ensured, the originally dispersed light is gathered in a specific angle range under the action of refraction and total reflection, the emitted light irradiates the liquid crystal panel, in the process, the heat of the LED is rapidly transmitted to the radiating block from the light bar and then transmitted to the mounting frame from the radiating block, the mounting frame is made of copper with better heat conductivity, the heat on the mounting frame is transmitted to the frame through the radiating silicone grease with better heat conductivity, the frame is made of copper with better heat conductivity, and the heat on the frame passes through the radiating port, the heat is dissipated by the convection of air inside and outside the shell, the LED is ensured not to gather a large amount of heat, the forbidden band width is prevented from narrowing due to the rising of the temperature of a node, the light-emitting wavelength is deviated, more invisible light radiation is caused, the brightness of the LED is attenuated, the adverse effect on wafer bonding glue and peripheral protection glue caused by overhigh temperature is prevented, the aging speed is reduced, the service life of the LED is prolonged, the use cost is saved, the membrane material on the edge of the LED is prevented from generating the Mylar phenomenon, the backlight module is ensured to be in a good working state, when the backlight module is transported on a bumpy road section, the mounting frame for mounting the backlight module is extruded by the convex blocks and the concave grooves in the shaking process, the heat-dissipating silicone grease in the concave grooves absorbs the impact force of the mounting frame, the backlight module is prevented from being damaged by vibration, the frame is pushed towards the direction of the mounting frame after the transportation is finished, and the concave grooves are clamped with the convex blocks, and the heat dissipation silicone grease in the groove is extruded to a gap between the mounting frame and the frame, so that the efficiency of transferring heat on the mounting frame to the frame is improved.
Preferably, a position of the frame corresponding to the mounting frame is fixedly connected with a limiting block, and an inclined plane is arranged on one side of the limiting block close to the mounting frame; one side, close to the frame, of the heat dissipation block is flush with the mounting frame, and heat dissipation silicone grease is filled in a gap between the frame and the mounting frame and between the frame and the heat dissipation block; when the installation frame shakes during operation, the installation frame slides and rubs along the inclined plane of the limiting block, so that the impact force of the installation frame and the resistance of the limiting block are mutually offset, the limiting block is made of silicon rubber with larger friction force and softer material, the vibration amplitude of the installation frame is reduced, meanwhile, the heat dissipation silicone grease can absorb part of the acting force between the installation frame and the frame, the backlight module is prevented from being damaged by vibration, the service life of the liquid crystal television is prolonged, the use cost of the liquid crystal television is reduced, the efficiency of the heat dissipation silicone grease transmitted from the heat dissipation block to the frame is improved, the service life of an LED is prolonged, after transportation is finished, the frame is pushed towards the direction of the installation frame, the installation frame slides along the inclined plane of the limiting block, the limiting block supports the installation frame tightly to prevent the installation frame from shaking, the position of the backlight module is fixed, and the angle of light irradiating the liquid crystal panel is fixed, the imaging effect is improved.
Preferably, a damping module is arranged inside the shell and comprises an Contraband-shaped frame, a first sliding groove, a sliding block, a spring and a hinge rod; the outer sides of the two frames are contacted with the 21274; one side of each of the Contraband-shaped frames, which is close to the inner wall of the shell, is hinged with a group of hinge rods; one end of the hinge rod, which is far away from the Contraband-shaped frame, is hinged with the sliding block; a first sliding groove is formed in the inner wall of the shell; the sliding block is connected in the first sliding groove in a sliding mode; one end of the spring is fixedly connected to the sliding block; the other end of the spring is fixedly connected to the inner wall of the first sliding groove; in operation, the frame and the mounting rack are arranged in the v-shaped rack 21274, the corners of the frame and the mounting rack are wrapped by the Contraband-shaped rack, the strength between structures is improved, meanwhile, the Contraband-shaped frame reduces the freedom degree of the frame and the mounting frame, improves the stability between structures, when the mounting frame shakes, the mounting frame extrudes the frame, so that the Contraband-shaped frame is extruded by the frame, so that the Contraband-shaped frame swings towards the outer side of the shell to make the < lambda > 21274 </lambda > shaped frame pulls the hinge rod to make the hinge rod rotate towards the middle part of the first sliding groove, thereby leading the hinged rod to drive the slide block to slide towards the middle part of the first sliding groove, leading the spring to be stretched in the sliding process of the slide block, thereby make the spring weaken the effort of rocking to reduce backlight unit vibration damage probability, improve LCD TV's life, reduce its use cost, Contraband shape frame material is the better copper of heat conductivility, thereby is less to backlight unit's heat dispersion influence.
Preferably, a threaded rod is connected to one side of the shell close to the Contraband-shaped frame in a threaded mode; the threaded rod is submerged into the outer side end face of the shell after installation is finished, and one end, close to the Contraband-shaped frame, of the threaded rod is fixedly connected with a push block; when the liquid crystal display television is in use after transportation is finished, the threaded rod is rotated to enable the threaded rod to move towards the inner side of the shell, the threaded rod moves to push the push block to extrude the Contraband-shaped frame close to the threaded rod, so that the 21274-shaped frame close to the threaded rod moves towards the inner side of the shell, so that the 21274-shaped frame close to the threaded rod pushes the hinge rod corresponding to the threaded rod, so that the hinge rod rotates towards two sides of the first sliding groove, so that the sliding block moves towards two sides of the first sliding groove, meanwhile, the sliding block moves to drive the hinge rod at the other side to rotate towards two sides of the first sliding groove, so that the Contraband-shaped frame corresponding to the hinge rod is pulled, so that the two 21274-shaped frames synchronously move inwards, the frames are abutted against the mounting frame, so that the two frames clamp the mounting frame, so that when the liquid crystal display television is in use, the backlight module is stably positioned in the shell, so that the position of the reflected light of the light guide plate is fixed, and the imaging effect is improved, when overhauing backlight unit, rotate the threaded rod and make the threaded rod drive the push pedal and keep away from Contraband shape frame and can be convenient dismantle backlight unit to practice thrift repair time, reduce backlight unit's maintenance cost.
Preferably, a second sliding groove is formed in one side, close to the sliding block, of the mounting frame; the second sliding groove is connected with the sliding block in a sliding mode, and the width of the middle of the second sliding groove is larger than the width of the two ends of the second sliding groove; the during operation, when the mounting bracket rocks, the slider is in the great department of width of No. two spouts, No. two spouts prevent that the mounting bracket range of rocking is too big, lead to the mounting bracket to rock and break away from with the frame, improve the stability of structure, make Contraband shape frame drive frame when pressing from both sides the mounting bracket tightly when rotating the threaded rod, the slider removes the both ends to No. two spouts, No. two spouts and slider laminating make the frame can't rock, thereby ensure that the frame is located the middle part of casing, thereby make light guide plate reverberation rigidity, and then improve the formation of image effect.
Preferably, an elastic membrane is fixedly connected to the inner wall of the second sliding groove and is in contact with the sliding block; when the sliding block is positioned at the position with smaller width at the two ends of the second sliding chute, the elastic film is in close contact with the sliding block; the during operation, when the mounting bracket rocks, slider and elastic membrane extrusion, make the elastic membrane absorb the effort of mounting bracket, reduce backlight unit's vibration range, reduce backlight unit's damage, improve LCD TV's life, reduce its use cost, make Contraband shape frame drive the frame when pressing from both sides the mounting bracket tightly when rotating the threaded rod, the slider removes the both ends to No. two spouts, elastic membrane and slider in close contact with, further assurance frame's stability, thereby make light guide plate reverberation rigidity, and then improve the formation of image effect.
The invention has the following beneficial effects:
1. according to the novel Mini-LED quantum dot structure backlight module for the liquid crystal television, the heat of the LED is dissipated in a convection manner through the heat dissipation module, so that the LED chip is prevented from gathering a large amount of heat, the phenomenon that the forbidden band width is narrowed due to the rising of the temperature of the junction, the light emitting wavelength is shifted, more invisible light radiation is caused, the brightness of the LED is attenuated, the adverse effect on wafer bonding glue and peripheral protection glue due to the overhigh temperature is avoided, the aging speed is slowed down, the service life of the LED is prolonged, and the use cost is saved.
2. According to the novel Mini-LED quantum dot structure backlight module for the liquid crystal display television, the damping module is arranged, so that the spring offsets the shaking acting force, the backlight module is prevented from being damaged by vibration, the service life of the liquid crystal display television is prolonged, and the use cost of the backlight module is reduced.
3. According to the novel Mini-LED quantum dot structure backlight module for the liquid crystal display television, the threaded rod is arranged, so that the backlight module is stably arranged in the shell when the liquid crystal display television is used, the position of reflected light of the light guide plate is fixed, the imaging effect is further improved, when the backlight module is overhauled, the threaded rod is rotated to enable the threaded rod to drive the push plate to be far away from the Contraband-shaped frame, the backlight module can be conveniently disassembled, the overhauling time is saved, and the maintenance cost of the backlight module is reduced.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a schematic view of the second embodiment of the present invention;
FIG. 4 is a schematic view of the shock absorbing module of the present invention;
in the figure: 1. a housing; 11. a threaded rod; 12. a push block; 2. a frame; 21. a limiting block; 3. a mounting frame; 31. a light guide plate; 32. an optical film; 33. a light bar; 34. a second chute; 35. an elastic film; 4. a heat dissipation module; 41. a heat dissipating block; 42. a groove; 43. a bump; 44. a heat dissipation port; 5. a shock-absorbing module; 51. contraband form rack; 52. a first chute; 53. a slider; 54. a spring; 55. a hinged lever.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 4, the novel Mini-LED quantum dot structure backlight module for the lcd tv includes a housing 1, a frame 2, a mounting frame 3 and a heat dissipation module 4; the inner wall of the shell 1 is provided with a mounting rack 3; the two sides of the mounting rack 3 are both provided with frames 2; the inner side of the mounting rack 3 is fixedly connected with a light guide plate 31; an optical diaphragm 32 is fixedly connected to one side of the light guide plate 31 far away from the mounting frame 3; the lamp strips 33 are arranged on the inner side of the mounting frame 3 and on two sides of the light guide plate 31;
the heat dissipation module 4 comprises a heat dissipation block 41, a groove 42, a bump 43 and a heat dissipation port 44; one sides of the two light bars 33 away from the light guide plate 31 are fixedly connected with heat dissipation blocks 41 through heat dissipation adhesive tapes; the two radiating blocks 41 are fixedly connected to the inner side of the mounting frame 3; grooves 42 are formed in one sides, close to the mounting rack 3, of the two frames 2, and heat dissipation silicone grease is filled in the two grooves 42; the mounting frame 3 is fixedly connected with the lug 43 at the position corresponding to the two grooves 42; a group of heat dissipation ports 44 are formed in the side surface of the shell 1 close to the heat dissipation block 41;
in the prior art, when an LED works, a large amount of heat is generated, the heat cannot be dissipated in time, the junction temperature is increased, the forbidden bandwidth is narrowed, the light-emitting wavelength is deviated, more invisible light radiation is caused, the brightness of the LED is attenuated, the wafer bonding glue and the peripheral protection glue are adversely affected due to overhigh temperature, the aging speed of the LED is accelerated, even the LED can be failed, the service life of the LED is shortened, and the heat cannot be dissipated in time, so that the membrane material on which the LED is placed is easy to generate a mu-La phenomenon; for example, when the vehicle-mounted television on a transport vehicle in a mountain area is transported on a bumpy road, the backlight module of the liquid crystal television is easy to vibrate and damage, the service life of the liquid crystal television is influenced, and a large amount of economic loss is caused;
the invention arranges the heat radiation module 4; the light bar 33 is fixedly connected with the radiating block 41 through a radiating adhesive tape with higher heat conductivity coefficient, the radiating block 41 is made of copper with better heat conductivity, so that the light bar 33 is in close contact with the radiating block 41, in the working process, the light bar 33 emits light, the scattering direction of the light is guided under the action of the light guide plate 31, the light is corrected through the optical film 32 to the scattering direction of the light, the uniformity of brightness is ensured, the originally dispersed light is gathered in a specific angle range under the action of refraction and total reflection, the emitted light is irradiated on the liquid crystal panel, in the process, the heat of the LED is rapidly transmitted from the light bar 33 to the radiating block 41 and then transmitted from the radiating block 41 to the mounting frame 3, the mounting frame 3 is made of copper with better heat conductivity, the heat on the mounting frame 3 is transmitted to the frame 2 through radiating silicone grease with better heat conductivity, the frame 2 is made of copper with better heat conductivity, the heat on the frame 2 passes through the heat dissipation port 44, so that the heat is dissipated by convection of air inside and outside the shell 1, and the LED is ensured not to gather a large amount of heat, thereby preventing the forbidden band width from narrowing due to the rise of the node temperature, causing the shift of the light-emitting wavelength, causing more invisible light radiation, causing the brightness attenuation of the LED, preventing the adverse effect of the over-high temperature on the wafer adhesive glue and the peripheral protective glue, slowing down the aging speed, prolonging the service life of the LED, saving the use cost, preventing the membrane material on the edge of the LED from generating the mylar phenomenon, ensuring that the backlight module is in a good working state, when the backlight module is transported on a bumpy road, the mounting frame 3 for mounting the backlight module absorbs the impact force of the mounting frame 3 by extruding the bump 43 and the groove 42 in the shaking process, thereby preventing the backlight module from being damaged by vibration, after the transportation, pushing the frame 2 to the mounting frame 3, so that the groove 42 is engaged with the protrusion 43, and the heat dissipation silicone grease in the groove 42 is extruded to the gap between the mounting frame 3 and the frame 2, thereby improving the efficiency of transferring heat on the mounting frame 3 to the frame 2.
As an embodiment of the invention, a position of the frame 2 corresponding to the mounting frame 3 is fixedly connected with a limiting block 21, and an inclined plane is arranged on one side of the limiting block 21 close to the mounting frame 3; one side of the heat dissipation block 41 close to the frame 2 is flush with the mounting frame 3, and heat dissipation silicone grease is filled in a gap between the frame 2 and the mounting frame 3 and the heat dissipation block 41; when the liquid crystal display television works, when the mounting frame 3 shakes, the mounting frame 3 slides and rubs along the inclined plane of the limiting block 21, so that the impact force of the mounting frame 3 and the resistance of the limiting block 21 are mutually offset, the limiting block 21 is made of silicon rubber with larger friction force and softer material, the vibration amplitude of the mounting frame 3 is reduced, meanwhile, the radiating silicon grease can absorb part of the acting force between the mounting frame 3 and the frame 2, so that the backlight module is prevented from being damaged by vibration, the service life of the liquid crystal display television is prolonged, the use cost of the liquid crystal display television is reduced, the efficiency of the heat of the radiating silicon grease transmitted from the radiating block 41 to the frame 2 is improved, the service life of an LED is prolonged, after transportation is finished, the frame 2 is pushed towards the mounting frame 3, the mounting frame 3 slides along the inclined plane of the limiting block 21, so that the mounting frame is abutted by the limiting block 21 and does not shake any more, and the position of the backlight module is fixed, the angle of the light irradiating the liquid crystal panel is fixed, and the imaging effect is improved.
As an embodiment of the present invention, a damping module 5 is disposed inside the housing 1, and the damping module 5 includes an Contraband-shaped frame 51, a first sliding groove 52, a sliding block 53, a spring 54 and a hinge rod 55; the outer sides of the two frames 2 are contacted with a V-shaped frame 51; the Contraband-shaped frames 51 are hinged with a group of hinge rods 55 at one side close to the inner wall of the shell 1; the ends of the hinge rods 55 far away from the Contraband-shaped frame 51 are hinged with the sliding blocks 53; a first sliding groove 52 is formed in the inner wall of the shell 1; the sliding block 53 is connected in the first sliding groove 52 in a sliding manner; one end of the spring 54 is fixedly connected to the sliding block 53; the other end of the spring 54 is fixedly connected to the inner wall of the first sliding groove 52; in the working process, the frame 2 and the mounting rack 3 are mounted in the v-21274in the frame 51, the corners of the frame 2 and the mounting rack 3 are wrapped by the Contraband-shaped frame 51, the strength between the structures is improved, meanwhile, the Contraband-shaped frame 51 reduces the freedom degree of the frame 2 and the mounting rack 3, the stability between the structures is improved, when the mounting rack 3 shakes, the frame 2 is extruded by the mounting rack 3, the frame 2 extrudes the Contraband-shaped frame 51, the Contraband-shaped frame 51 shakes towards the outer side of the shell 1, the Contraband-shaped frame 51 pulls the hinge rod 55, the hinge rod 55 rotates towards the middle part of the first sliding groove 52, the hinge rod 55 drives the sliding block 53 to slide towards the middle part of the first sliding groove 52, the sliding block 53 stretches the spring 54 in the sliding process, the spring 54 weakens the shaking acting force, the vibration damage probability of the backlight module is reduced, the service life of the liquid crystal display television is prolonged, and the use cost of the liquid crystal display television is reduced, the Contraband-shaped frame 51 is made of copper with good heat conductivity, so that the influence on the heat dissipation performance of the backlight module is small.
As an embodiment of the invention, a threaded rod 11 is screwed on one side of the shell 1 close to the Contraband-shaped frame 51; the threaded rod 11 is submerged into the outer end face of the shell 1 after installation, and one end, close to the Contraband-shaped frame 51, of the threaded rod 11 is fixedly connected with a push block 12; in operation, when the lcd television is transported to start using, the threaded rod 11 is rotated to move the threaded rod 11 toward the inner side of the housing 1, the threaded rod 11 moves to push the push block 12 to press the 21274adjacent to the threaded rod 11, the shaped frame 51 moves toward the inner side of the housing 1 to push the 21274adjacent to the threaded rod 11, the shaped frame 51 pushes the hinge rod 55 corresponding to the threaded rod 51 to rotate the hinge rod 55 toward the two sides of the first sliding groove 52, so that the slide block 53 moves toward the two sides of the first sliding groove 52, and simultaneously the slide block 53 moves to drive the hinge rod 55 at the other side to rotate toward the two sides of the first sliding groove 52, so that the Contraband shaped frame 51 corresponding to the hinge rod 55 is pulled, so that the two Contraband shaped frames 51 synchronously move inward to press the frame 2 against the mounting frame 3, so that the two frames 2 clamp the mounting frame 3, so that the backlight module is stably located in the housing 1 when the lcd television is used, thereby make light guide plate 31 reverberation rigidity, and then improve the formation of image effect, when overhauing backlight unit, rotate threaded rod 11 and make threaded rod 11 drive the push pedal and keep away from Contraband shape frame 51 and can be convenient dismantle backlight unit to practice thrift repair time, reduce backlight unit's maintenance cost.
As an embodiment of the present invention, a second sliding groove 34 is formed on one side of the mounting frame 3 close to the sliding block 53; the second sliding groove 34 is connected with the sliding block 53 in a sliding mode, and the width of the middle of the second sliding groove 34 is larger than the width of the two ends of the second sliding groove; the during operation, when mounting bracket 3 rocks, slider 53 is in the great department of the width of No. two spout 34, No. two spout 34 prevents that mounting bracket 3 from rocking the range too big, lead to mounting bracket 3 to rock and break away from with frame 2, improve the stability of structure, make Contraband shape frame 51 drive frame 2 when pressing from both sides mounting bracket 3 tightly when rotating threaded rod 11, slider 53 removes the both ends to No. two spout 34, No. two spout 34 makes frame 2 unable rock with slider 53 laminating, thereby ensure that frame 2 is located the middle part of casing 1, thereby make light guide plate 31 reverberation rigidity, and then improve the formation of image effect.
As an embodiment of the present invention, an elastic membrane 35 is fixedly attached to an inner wall of the second sliding chute 34, and the elastic membrane 35 is in contact with the sliding block 53; when the slide block 53 is positioned at the position with smaller width at the two ends of the second sliding groove 34, the elastic film 35 is tightly contacted with the slide block 53; the during operation, when mounting bracket 3 rocks, slider 53 extrudees with elastic membrane 35, make elastic membrane 35 absorb mounting bracket 3's effort, reduce backlight unit's vibration range, reduce backlight unit's damage, improve LCD TV's life, reduce its use cost, when making Contraband shape frame 51 drive frame 2 press from both sides mounting bracket 3 when rotating threaded rod 11 and press from both sides tightly, slider 53 removes the both ends to No. two spout 34, elastic membrane 35 and slider 53 in close contact with, further assurance frame 2's stability, thereby make light guide plate 31 reverberation rigidity, and then improve the imaging effect.
The specific working process is as follows:
the light bar 33 is fixedly connected with the radiating block 41 through the radiating adhesive tape with higher heat conductivity coefficient, so that the light bar 33 is in close contact with the radiating block 41, in the working process, the light bar 33 emits light, the scattering direction of the light is guided under the action of the light guide plate 31, the light corrects the scattering direction of the light through the optical film 32, the uniformity of brightness is ensured, the originally scattered light is gathered in a specific angle range under the action of refraction and total reflection, the emitted light irradiates the liquid crystal panel, in the process, the heat of the LED is rapidly transmitted to the radiating block 41 from the light bar 33 and then transmitted to the mounting frame 3 from the radiating block 41, the heat on the mounting frame 3 is transmitted to the frame 2 through the radiating silicone grease with better radiating performance, the heat on the frame 2 is gathered through the radiating port 44, so that the heat is dissipated through the convection of air inside and outside the shell 1, and the LED is ensured not to have a large amount of heat, thereby preventing the forbidden band width from narrowing due to the rising of the temperature of the nodes, causing the deviation of the light-emitting wavelength, causing more invisible radiation to cause the brightness attenuation of the LED, preventing the adverse effect on the wafer bonding glue and the peripheral protection glue caused by overhigh temperature, slowing down the aging speed, prolonging the service life of the LED, saving the use cost, preventing the membrane material on the edge of the LED from generating the Mylar phenomenon, ensuring that the backlight module is in a good working state, ensuring that the impact force of the mounting frame 3 is absorbed by the heat-radiating silicone grease in the groove 42 in the shaking process of the mounting frame 3 for mounting the backlight module during the transportation of bumpy road sections, preventing the backlight module from being damaged by vibration, pushing the frame 2 towards the mounting frame 3 after the transportation is finished, clamping the groove 42 and the bump 43, and extruding the heat-radiating silicone grease in the groove 42 to the gap between the mounting frame 3 and the frame 2, therefore, the efficiency of transferring heat on the mounting frame 3 to the frame 2 is improved, the position, corresponding to the mounting frame 3, of the frame 2 is fixedly connected with the limiting block 21, and an inclined plane is arranged on one side, close to the mounting frame 3, of the limiting block 21; one side of the heat dissipation block 41 close to the frame 2 is flush with the mounting frame 3, and heat dissipation silicone grease is filled in a gap between the frame 2 and the mounting frame 3 and the heat dissipation block 41; when the liquid crystal television works, when the mounting frame 3 shakes horizontally and vertically, the mounting frame 3 and the limiting block 21 are mutually extruded, so that the mounting frame 3 slides along the inclined plane of the limiting block 21, the mounting frame 3 can be mutually converted by acting force in the horizontal direction and the vertical direction, and part of acting force is converted into friction force, so that the vibration amplitude of the mounting frame 3 is reduced, meanwhile, the radiating silicone grease can absorb part of acting force between the mounting frame 3 and the frame 2, so that the backlight module is prevented from being damaged by vibration, the service life of the liquid crystal television is prolonged, the use cost of the liquid crystal television is reduced, the efficiency of transmitting heat of the radiating silicone grease from the radiating block 41 to the frame 2 is improved, so that the service life of an LED is prolonged, after transportation is finished, the frame 2 is pushed towards the mounting frame 3, the mounting frame 3 slides along the inclined plane of the limiting block 21, so that the mounting frame is abutted by the limiting block 21 and is not shaken any more, thereby make the backlight module position fixed, make the angle that the light shines on the liquid crystal display panel fixed, improve the imaging effect, through installing frame 2 and mounting bracket 3 to the shape frame 51, in Contraband shape frame 51 wrap up the corner of frame 2 and mounting bracket 3, improve the intensity between the structure, Contraband shape frame 51 has reduced the degree of freedom of frame 2 and mounting bracket 3 simultaneously, improve the stability between the structure, when the mounting bracket 3 rocks, mounting bracket 3 extrudes frame 2, make frame 2 extrude Contraband shape frame 51, thereby make Contraband shape frame 51 rock to the casing 1 outside, make Contraband shape frame 51 pull hinge rod 55, make hinge rod 55 rotate to a spout 52 middle part, thereby make hinge rod 55 drive slider 53 slide to a spout 52 middle part, slider 53 slides in-process makes spring 54 tensile, thereby make spring 54 weaken the effort of rocking, when the liquid crystal display television is transported to be started to be used, the threaded rod 11 is rotated to enable the threaded rod 11 to move towards the inner side of the shell 1, the threaded rod 11 moves to push the push block 12 to press the v-21274-shaped frame 51 close to the threaded rod 11, so that the v-21274-shaped frame 51 close to the threaded rod 11 moves towards the inner side of the shell 1, the v-shaped frame 51 close to the threaded rod 11 pushes the hinge rod 55 corresponding to the v-21274-shaped frame 51, the hinge rod 55 rotates towards two sides of the first sliding groove 52, so that the sliding block 53 moves towards two sides of the first sliding groove 52, meanwhile, the sliding block 53 moves to drive the hinge rod 55 at the other side to rotate towards two sides of the first sliding groove 52, so that the Contraband-shaped frame 51 corresponding to the sliding block 51 is pulled, so that the two Contraband-shaped frames 51 synchronously move inwards, the frame 2 is tightly pressed against the mounting frame 3, so that the two frames 2 tightly clamp the mounting frame 3, when the mounting frame 3 shakes, the sliding blocks 53 are positioned at the position where the width of the second sliding grooves 34 is large, the second sliding grooves 34 prevent the mounting frame 3 from shaking too much to cause the mounting frame 3 to shake and separate from the frame 2, the stability of the structure is improved, when the Contraband-shaped frame 51 drives the frame 2 to clamp the mounting frame 3 tightly by rotating the threaded rods 11, the sliding blocks 53 move to the two ends of the second sliding grooves 34, the second sliding grooves 34 are attached to the sliding blocks 53 to enable the frame 2 to be incapable of shaking, so that the frame 2 is ensured to be positioned in the middle of the shell 1, thereby make light guide plate 31 reverberation rigidity, and then improve the imaging effect, when mounting bracket 3 rocks, slider 53 extrudees with elastic film 35, make elastic film 35 absorb mounting bracket 3's effort, reduce backlight unit's vibration range, reduce backlight unit's damage, improve LCD TV's life, reduce its use cost, when making Contraband shape frame 51 drive frame 2 press from both sides mounting bracket 3 when rotating threaded rod 11 and pressing from both sides tightly, slider 53 removes the both ends to No. two spout 34, elastic film 35 and slider 53 in close contact with, further assurance frame 2's stability, thereby make light guide plate 31 reverberation rigidity, and then improve the imaging effect.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides a LCD TV is with novel Mini-LED quantum dot structure backlight unit which characterized in that: the heat dissipation device comprises a shell (1), a frame (2), a mounting rack (3) and a heat dissipation module (4); the mounting frame (3) is mounted on the inner wall of the shell (1); frames (2) are arranged on two sides of the mounting rack (3); the inner side of the mounting rack (3) is fixedly connected with a light guide plate (31); an optical diaphragm (32) is fixedly connected to one side of the light guide plate (31) far away from the mounting frame (3); the lamp strips (33) are arranged on the inner side of the mounting frame (3) and positioned on two sides of the light guide plate (31);
the heat dissipation module (4) comprises a heat dissipation block (41), a groove (42), a bump (43) and a heat dissipation port (44); one sides of the two light bars (33) far away from the light guide plate (31) are fixedly connected with a heat dissipation block (41) through heat dissipation adhesive tapes; the two radiating blocks (41) are fixedly connected to the inner side of the mounting rack (3); grooves (42) are formed in one sides, close to the mounting rack (3), of the two frames (2), and heat dissipation silicone grease is filled in the two grooves (42); the mounting frame (3) is fixedly connected with the convex blocks (43) at the positions corresponding to the two grooves (42); a group of heat dissipation ports (44) are formed in the side face, close to the heat dissipation block (41), of the shell (1).
2. The novel Mini-LED quantum dot structure backlight module for the liquid crystal display television set as claimed in claim 1, wherein: a limiting block (21) is fixedly connected to the position of the frame (2) corresponding to the mounting frame (3), and an inclined surface is arranged on one side, close to the mounting frame (3), of the limiting block (21); one side of the radiating block (41) close to the frame (2) is flush with the mounting rack (3), and radiating silicone grease is filled in a gap between the frame (2) and the mounting rack (3) and between the radiating block (41).
3. The novel Mini-LED quantum dot structure backlight module for the liquid crystal display television set as claimed in claim 2, wherein: the damping device is characterized in that a damping module (5) is arranged in the shell (1), and the damping module (5) comprises an Contraband-shaped frame (51), a first sliding groove (52), a sliding block (53), a spring (54) and a hinge rod (55); the outer sides of the two frames (2) are in contact with a V-shaped frame (51); a group of hinge rods (55) are hinged on one sides of the two Contraband-shaped frames (51) close to the inner wall of the shell (1); one end of the hinge rod (55) far away from the Contraband-shaped frame (51) is hinged with a sliding block (53); a first sliding groove (52) is formed in the inner wall of the shell (1); the sliding block (53) is connected in the first sliding groove (52) in a sliding manner; one end of a spring (54) is fixedly connected to the sliding block (53); the other end of the spring (54) is fixedly connected to the inner wall of the sliding chute.
4. The novel Mini-LED quantum dot structure backlight module for the liquid crystal display television set as claimed in claim 3, wherein: one side of the shell (1) close to the Contraband-shaped frame (51) is in threaded connection with a threaded rod (11); the threaded rod (11) is submerged into the outer side end face of the shell body 1 after installation is completed, and one end, close to the Contraband-shaped frame (51), of the threaded rod (11) is fixedly connected with the push block (12).
5. The novel Mini-LED quantum dot structure backlight module for the liquid crystal display television set as claimed in claim 4, wherein: a second sliding groove (34) is formed in one side, close to the sliding block (53), of the mounting frame (3); the second sliding groove (34) is connected with the sliding block (53) in a sliding mode, and the width of the middle of the second sliding groove (34) is larger than the width of the two ends of the second sliding groove.
6. The novel Mini-LED quantum dot structure backlight module for the liquid crystal display television set as claimed in claim 5, wherein: an elastic membrane (35) is fixedly connected to the inner wall of the second sliding groove (34), and the elastic membrane (35) is in contact with the sliding block (53); when the sliding block (53) is positioned at the position where the width of the two ends of the second sliding groove (34) is smaller, the elastic film (35) is in close contact with the sliding block (53).
CN202110765957.5A 2021-07-05 2021-07-05 Novel Mini-LED quantum dot structure backlight module for liquid crystal display television Pending CN113625487A (en)

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Publication number Priority date Publication date Assignee Title
KR20150032359A (en) * 2013-09-16 2015-03-26 엘지디스플레이 주식회사 Method of fabricating liquid crystal display device
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CN209356797U (en) * 2019-03-13 2019-09-06 深圳天歆科技有限公司 A kind of damping type liquid crystal display device
CN210803913U (en) * 2019-12-25 2020-06-19 山水电子(中国)有限公司 Novel and have protect function's liquid crystal display module
CN211014915U (en) * 2019-09-25 2020-07-14 深圳今朝辉科技有限公司 L CM liquid crystal display module
CN211809392U (en) * 2020-03-09 2020-10-30 深圳市金泰壹电子有限公司 Liquid crystal display screen for automobile

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150032359A (en) * 2013-09-16 2015-03-26 엘지디스플레이 주식회사 Method of fabricating liquid crystal display device
CN105549263A (en) * 2016-02-03 2016-05-04 京东方科技集团股份有限公司 Backlight module and display device
CN207636896U (en) * 2017-12-29 2018-07-20 鞍山大华显示技术有限公司 A kind of straight-down negative display module
CN209356797U (en) * 2019-03-13 2019-09-06 深圳天歆科技有限公司 A kind of damping type liquid crystal display device
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