CN218446300U - Backlight plate, backlight module and display device - Google Patents
Backlight plate, backlight module and display device Download PDFInfo
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- CN218446300U CN218446300U CN202222848867.5U CN202222848867U CN218446300U CN 218446300 U CN218446300 U CN 218446300U CN 202222848867 U CN202222848867 U CN 202222848867U CN 218446300 U CN218446300 U CN 218446300U
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Abstract
The application discloses a backlight lamp panel, a backlight module and a display device, wherein the backlight lamp panel comprises a driving substrate; the plurality of light-emitting units are arranged on the driving substrate and are arranged in an array; a reflective layer disposed on the driving substrate and arranged around the light emitting unit; any two adjacent reflecting layers are arranged at intervals; the height of the reflecting layer is smaller than that of the light emitting unit. When the reflection stratum is all arranged in every luminescence unit's periphery in this application, interval arrangement between two adjacent reflection stratum, the stress of every reflection stratum all toward respective center department retraction, makes the stress that produces because of each reflection stratum retraction can offset each other on the surface of drive base plate, thereby effectively reduces the warping probability of drive base plate. Meanwhile, light rays emitted from the side face of the light emitting unit can be reflected by the reflecting layer, so that the luminous efficiency of the backlight lamp panel is improved.
Description
Technical Field
The application relates to the technical field of display, especially, relate to a backlight plate, backlight unit and display device.
Background
In the lamp plate in a poor light, the reflective layer is arranged to one side that needs installation luminescence chip on the base plate to light that sends luminescence chip through the reflective layer reflects, promotes the light-emitting effect. In the prior art, a reflective layer is formed by paving reflective ink on the whole surface of a substrate; however, because the ink has a large expansion and shrinkage, after the high temperature process is completed, the ink will shrink from the outside to the inside, i.e. the whole ink shrinkage stress is inward, thereby causing the warpage of the four corners of the substrate.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
Technical problem that this application will solve lies in, to prior art's above-mentioned defect, provides a backlight lamp plate, backlight unit and display device, aims at reducing base plate warpage probability.
The technical scheme adopted by the application for solving the technical problem is as follows:
a backlight panel, comprising:
a drive substrate;
the plurality of light-emitting units are arranged on the driving substrate and are arranged in an array;
a reflective layer disposed on the driving substrate and arranged around the light emitting unit;
any two adjacent reflecting layers are arranged at intervals; the height of the reflecting layer is smaller than that of the light emitting unit.
Through the scheme, the reflecting layers are arranged on the periphery of each light-emitting unit, the two adjacent reflecting layers are arranged at intervals, and the stress of each reflecting layer is inwards contracted towards the center of each reflecting layer, so that the stress generated by the contraction of each reflecting layer on the surface of the driving substrate can be mutually counteracted, and the warping probability of the driving substrate is effectively reduced. Meanwhile, the height of the reflecting layer is smaller than that of the light emitting unit, so that light rays emitted by the side face of the light emitting unit can be reflected by the reflecting layer, and the light emitting efficiency of the backlight panel is improved.
Optionally, the backlight panel further includes:
and the transparent light-gathering layer covers the light-emitting surface of the light-emitting unit.
Through the scheme, the light-emitting surface of each light-emitting unit is covered with the transparent light-gathering layer, so that the light emitted by the light-emitting units can be effectively gathered while the light-emitting units are packaged and protected through the transparent light-gathering layers, and the light-gathering effect is achieved.
Optionally, one side of the transparent light-gathering layer, which is far away from the driving substrate, is in a convex arc shape.
Through the scheme, the transparent light-gathering layer forms a convex arc shape along one side of the light-emitting surface of the light-emitting unit, so that the transparent light-gathering layer forms a lens shape, and the light-gathering effect of the transparent light-gathering layer on the light-emitting unit is favorably improved.
Optionally, the backlight panel further includes:
the reflection retaining wall is arranged around the periphery of the transparent light-gathering layer;
through the scheme, the two random adjacent light-emitting units are shielded and separated by the reflection retaining wall, so that the reflection retaining wall is arranged at the intersection of the emergent light rays of the two adjacent light-emitting units, and light mixing between the two adjacent light-emitting units is effectively avoided.
Optionally, the reflective retaining wall comprises a white glue reflective retaining wall.
Through the scheme, the white glue reflection retaining wall has a certain light reflection effect; the side that the white glue reflection barricade is close to luminescence unit can be right along the direction of height luminescence unit's light-emitting produces the reflection effect, further promotes the luminous efficacy of backlight plate.
Optionally, the height that highly is less than transparent light-gathering layer of reflection barricade, just the reflection barricade with the value range of difference in height between the transparent light-gathering layer does: 30-200 μm.
Through the scheme, the light-emitting unit is followed transparent light-gathering layer is kept away from the light of drive base plate one side outgoing can not totally by the reflection barricade shelters from, has increased the angle of light-emitting unit outgoing light has promoted the luminous efficacy of backlight lamp plate. Simultaneously, will the reflection barricade with the value range of the difference in height between the transparent light-gathering layer sets up to: 30-200 μm, so that the angle of the emergent light of the light-emitting unit is good on the premise of ensuring that the whole volume of the backlight lamp panel is as small as possible.
Optionally, the height of the reflective layer has a range of: 15-50 μm; the height of the light-emitting unit has a value range of: 50-150 μm.
Optionally, the light emitting unit is bonded to a pad of the driving substrate.
Through the scheme, eutectic reaction can be generated between the bonding pad of the driving substrate and the light-emitting unit, so that the welding effect is achieved, and the light-emitting unit is positioned on the driving substrate.
A backlight module comprises the backlight panel and an optical film; the optical film is arranged on the light-emitting side of the backlight panel.
A display device comprises the backlight module and a liquid crystal module; the liquid crystal module is arranged on the light-emitting side of the backlight module.
When the reflection stratum is all arranged in every luminescence unit's periphery in this application, interval arrangement between two adjacent reflection stratum, the stress of every reflection stratum all toward respective center department retraction, makes the stress that produces because of each reflection stratum retraction can offset each other on the surface of drive base plate, thereby effectively reduces the warping probability of drive base plate. Meanwhile, light rays emitted from the side face of the light emitting unit can be reflected by the reflecting layer, so that the luminous efficiency of the backlight lamp panel is improved.
Drawings
FIG. 1 is a top view of a prior art backlight panel;
FIG. 2 is a front view of a prior art backlight panel;
FIG. 3 is a top view of a full-face printed white ink on the driving substrate of the present application;
FIG. 4 is a front view of a full-face printed white ink on the drive substrate of the present application;
FIG. 5 is a first view of a plurality of reflective layers and a plurality of bonding pads distributed on the driving substrate according to the present application;
FIG. 6 is a second view of the present application showing a plurality of reflective layers and a plurality of bonding pads distributed on the driving substrate;
fig. 7 is a first view of a plurality of reflective layers and a plurality of light emitting units distributed on the driving substrate in the present application;
fig. 8 is a second view of a plurality of reflective layers and a plurality of light emitting units distributed on the driving substrate in the present application;
fig. 9 is a first view of a plurality of reflective layers, a plurality of light emitting units, and the reflective barriers on the driving substrate;
FIG. 10 is a second view of the present application showing the distribution of a plurality of reflective layers, a plurality of light emitting units, and the reflective barriers on the driving substrate;
FIG. 11 is a schematic structural diagram of a backlight panel according to the present application;
FIG. 12 is a schematic structural diagram of a backlight module according to the present application;
fig. 13 is a schematic view of the structure of the display device described in the present application.
Description of the reference numerals:
100-a substrate; 200-ink; 1-a drive substrate; 11-pads; 2-a reflective layer; 10-clearance; 3-a light-emitting unit; 4-a reflective retaining wall; 5-transparent light-gathering layer; 20-white ink; 101-a back plate; 102-a diffuser plate; 103-an optical membrane; 104-liquid crystal module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application clearer and clearer, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
The inventor finds that an optical reflection layer is required to be arranged on one side of the substrate 100 on which the light-emitting chip is mounted when the backlight panel is manufactured, so that light emitted by the light-emitting chip is reflected through the optical reflection layer, and the light-emitting effect is improved. As shown in fig. 1 and 2, in the prior art, an optical reflection layer is formed by spreading a light reflecting ink 200 on the entire surface of a substrate 100; however, since the ink 200 expands and contracts greatly, after the high temperature process is completed, the ink 200 contracts from the outside to the inside, i.e. the whole contraction stress of the ink 200 is inward (the arrow in fig. 1 indicates the direction of the contraction stress of the ink), so that the four corners of the substrate 100 are warped.
In order to solve the above technical problems, the present application provides a backlight panel, as shown in fig. 7, 8 and 11, the backlight panel includes a driving substrate 1, a plurality of reflective layers 2 and a plurality of light emitting units 3; the plurality of reflecting layers 2 and the plurality of light-emitting units 3 are arranged on the driving substrate 1 and are positioned on the same side of the driving substrate 1; the plurality of reflecting layers 2 and the plurality of light emitting units 3 are arranged in an array and correspond to one another.
Specifically, as shown in fig. 5, 7 and 9, the reflective layer 2 corresponds to one light emitting unit 3 and is circumferentially arranged along the periphery of the light emitting unit 3 in a closed loop; any two adjacent reflective layers 2 are arranged at intervals, that is, as shown in fig. 5 to 8 and fig. 10 to 11, any two adjacent reflective layers 2 have a gap 10 therebetween.
In this application, set up on the drive base plate 1 when the luminescence unit 3, still set up reflection stratum 2, and make reflection stratum 2 is followed the periphery of luminescence unit 3 is the closed loop and encircles and arrange, makes luminescence unit 3 can be positioned when on the drive base plate 1, the light that luminescence unit 3 sent can by reflection stratum 2 reflects. The two adjacent reflective layers 2 are not connected, but arranged at intervals, so that each reflective layer 2 forms an independent block, the stress of each independent block retracts toward the center of the block (as an arrow in fig. 5 indicates the direction of the shrinkage stress of each reflective layer 2), and the stresses generated by the retraction of each reflective layer 2 on the surface of the driving substrate 1 can be cancelled out, thereby effectively reducing the probability of the warping of the driving substrate 1.
As shown in fig. 8, the height of the reflective layer 2 is smaller than the height of the light emitting unit 3, that is, the light emitting unit 3 may be partially exposed to the side surface with respect to the reflective layer 2, and the light emitted from the side surface of the light emitting unit 3 may also be reflected by the reflective layer 2, so as to improve the light emitting efficiency of the backlight panel.
In an embodiment of the present application, the driving substrate 1 is any one of a glass driving substrate, a PCB driving substrate, and an FR4 driving substrate.
In an embodiment of the present application, the reflective layer 2 includes a white ink reflective layer; as shown in fig. 3 and 4, the white ink 20 may be directly printed on the entire surface of the driving substrate 1 by screen printing or inkjet printing; after printing, the white ink 20 corresponding to the gap 10 between two adjacent reflective layers 2 and the region where the light emitting unit 3 is mounted are developed by exposure and development, and the entire surface white ink 20 is divided into a plurality of white ink reflective layers 2, as shown in fig. 5 and 6.
In this embodiment, the height of the white ink reflective layer 2 is 15 μm to 50 μm. In the embodiment, the height of the white ink reflective layer 2 is 25 μm, which satisfies the general process capability of screen printing white ink or ink jet printing white ink in the prior art, so that the height required by the white ink reflective layer 2 can be achieved by one printing.
As shown in fig. 11, the backlight panel further includes a plurality of transparent light-gathering layers 5, and when the transparent light-gathering layers 5 are used for transmitting light, the light is gathered to achieve the light-gathering effect. Specifically, the plurality of transparent light-gathering layers 5 are arranged in an array, and the plurality of transparent light-gathering layers 5 correspond to the plurality of light-emitting units 3 one to one.
Specifically, the transparent light-gathering layer 5 covers the light-emitting surface of the light-emitting unit 3, so that the light-emitting unit 3 is packaged and protected, and meanwhile, light rays emitted by the light-emitting unit 3 are effectively gathered, and a light-gathering effect is achieved.
In this application, transparent light-gathering layer 5 adopts transparent encapsulation to glue the spotlight layer to cut down through piezoelectricity the transparent encapsulation of luminescence unit 3's play plain noodles coating is glued, thereby forms the transparent encapsulation of lens state and glues the spotlight layer. In an embodiment of this embodiment, the viscosity of the light-condensing layer of the transparent encapsulating adhesive is 1700mpa.s to 4000mpa.s, so as to ensure the stability of the adhesion between the light-condensing layer of the transparent encapsulating adhesive and the light-emitting unit 3.
As shown in fig. 9-11, the backlight panel further includes a reflective wall 4; reflection barricade 4 is followed the periphery of transparent spotlight layer 5 is the closed loop and encircles the setting for reflection barricade 4 arranges in the intersection of the emergent light of two adjacent luminescence unit 3, thereby shelters from the light between two adjacent luminescence unit 3 and separates, effectively avoids producing the mixed light between two adjacent luminescence unit 3.
Transparent light-gathering layer 5 with the inner wall of reflection barricade 4 is laminated each other, just reflection barricade 4 highly is greater than luminescence unit 3's height for between arbitrary two adjacent luminescence unit 3 and between arbitrary two adjacent reflection stratum 2 all sheltered from by reflection barricade 4 and separate, reflect barricade 4 promptly and arrange in the intersection of two adjacent luminescence unit 3's outgoing ray, thereby pass through reflection barricade 4 effectively avoids producing between two adjacent luminescence unit 3 and mixes the light.
It should be noted that, in the present application, the height refers to the protruding height of the structural member relative to the surface of the driving substrate 1, such as: the height of the reflecting retaining wall 4 is the height of the reflecting retaining wall 4 protruding relative to the surface of the driving substrate 1, the height of the light-emitting unit 3 is the height of the light-emitting unit 3 protruding relative to the surface of the driving substrate 1, and the height of the reflecting layer 2 is the height of the reflecting layer 2 protruding relative to the surface of the driving substrate 1; the height direction of the reflecting retaining wall 4, the height direction of the light emitting unit 3 and the height direction of the reflecting layer 2 are all the same.
In an embodiment of the present application, as shown in fig. 10 and 11, for the reflective wall 4 located between two adjacent light emitting units 3, a part of the reflective wall is located in the gap 10, and is attached to two adjacent reflective layers 2; the other part is located outside the gap 10 and has a width larger than the gap 10, so that the other part can partially cover the reflecting layer 2.
In this embodiment, along the direction of height, the part of reflection barricade 4 that exceeds reflection stratum 2 with reflection stratum 2 part overlaps, makes reflection barricade 4 be located the thickness of the part outside clearance 10 increases, thereby promotes reflection barricade 4 along the intensity of direction of height, guarantees reflection barricade 4 prevents the effect of mixing light between two adjacent luminescence units 3.
In an embodiment of the application, the width of the gap 10 is 0.1mm to 2.5mm, which can avoid the phenomenon that the driving substrate 1 is too large in size due to the fact that the width of the gap 10 is too large and the occupied area of the plurality of reflection layers 2 tiled on the driving substrate 1 is too large; and the phenomenon that the reflection retaining wall 4 is separated from the driving substrate 1 due to insufficient stability after the gap 10 passes through the reflection retaining wall 4 caused by the undersize width of the gap 10 can be avoided.
The reflection retaining wall 4 comprises a white glue reflection retaining wall which has a certain light reflection effect; because the inner wall orientation of white glue reflection barricade luminescence unit 3 arranges, therefore white glue reflection barricade can be right along the direction of height luminescence unit 3's emergent ray produces the reflection effect to realize further promoting the luminous efficacy's of backlight lamp plate purpose.
The mode of cutting a little white glue through piezoelectricity forms in this application drive substrate 1 is last to form white glue reflection barricade. In this application, the height of white glue reflection barricade is 150 mu m ~ 1500 mu m, can ensure it to adjacent two prevent the effect of mixing light between the luminescence unit 3, can guarantee again that white is handed over and can keep certain support intensity after the reflection barricade solidification.
The height of transparent spotlight layer 5 is greater than the height of reflection barricade 4 makes light-emitting unit 3 to keeping away from the light of 1 one side outgoing of drive base plate can not totally by reflection barricade 4 shelters from, has increased the angle of 3 outgoing light of light-emitting unit has promoted the luminous efficacy of backlight plate.
In one embodiment of the present application, the difference between the height of the transparent light-gathering layer 5 and the height of the reflective retaining wall 4 is 30 μm to 200 μm. In an embodiment of the present invention, a difference between the height of the transparent light-gathering layer 5 and the height of the reflective retaining wall 4 is 60 μm, that is, the transparent light-gathering layer 5 exceeds 60 μm relative to the reflective retaining wall 4, so that an angle of the light emitted from the light-emitting unit 3 is good on the premise that the overall size of the backlight panel is as small as possible.
The light emitting unit 3 includes a light emitting chip; as shown in fig. 5 to 11, the driving substrate 1 has a pad 11; the light emitting chip is arranged on one side of the bonding pad 11, which is far away from the driving substrate 1. After the light-emitting chip is arranged on the bonding pad 11, eutectic reaction can be generated between the bonding pad 11 and the light-emitting chip, so that a welding effect is achieved, and the light-emitting chip is positioned on the driving substrate 1.
In this application, the height of pad 11 is 0.5 mu m ~ 25 mu m, the height of luminous chip is 50 mu m ~ 150 mu m, in order to guarantee luminous chip's pad 11 with take place the eutectic reaction back between the pad 11, luminous chip keeps away from drive base plate 1 surface can surpass reflector layer 2 keeps away from drive base plate 1's surface, thereby makes the light that the side of luminescence unit 3 sent also can obtain reflector layer 2's reflection, reaches the promotion the luminous efficacy's of the lamp plate of being shaded effect.
In an embodiment of the application, the light emitting chip is a bare LED chip to ensure the lightness and thinness of the backlight panel.
The manufacturing method of the backlight panel specifically comprises the following steps:
providing a driving substrate, wherein the driving substrate is provided with a plurality of bonding pads according to circuit design; printing white ink on the whole surface of one surface of the driving substrate, which is close to the plurality of bonding pads; wherein, the white ink can be printed by adopting a screen printing/ink jet printing mode;
developing the white ink corresponding to each bonding pad on the driving substrate and the gap area between every two adjacent white ink reflecting layers in an exposure and development mode to enable the whole white ink to be divided into a plurality of white ink reflecting layers;
reflowing the light emitting chip on each pad;
white glue is dispensed on the peripheries of the plurality of white ink reflecting layers on the driving substrate and in a gap area between two adjacent white ink reflecting layers through piezoelectric valve, so that a white glue reflecting retaining wall is formed on the periphery of the light emitting chip in a surrounding mode;
transparent packaging glue is filled in a closed loop area formed by each white glue reflection retaining wall through a piezoelectric valve and is arranged in a lens shape to form a plurality of transparent packaging glue light-gathering layers.
The present application further provides a backlight module, as shown in fig. 12, the backlight module includes the backlight panel as described above, and further includes a back plate 101, a diffusion plate 102, and an optical film 103; the edges of the periphery of the back plate 101 are folded towards the same side to form folded edges; the backlight lamp panel is arranged on the back plate 101; the diffusion plate 102 is arranged on the folded edge of the back plate 101 and is positioned on the light emergent side of the backlight panel; the optical film 103 is disposed on a side of the diffuser plate 102 away from the backlight panel.
The present application further provides a display device, as shown in fig. 13, the display device includes the backlight module and the liquid crystal module 104; the liquid crystal module 104 is disposed on a light-emitting side of the backlight module. The assembly positioning between the liquid crystal module 104 and the backlight module adopts the prior art, and this is not repeated herein.
In summary, the present application provides a backlight panel, a backlight module and a display device, wherein the backlight panel includes a driving substrate; the plurality of light-emitting units are arranged on the driving substrate and are arranged in an array; a reflective layer disposed on the driving substrate and arranged around the light emitting unit; any two adjacent reflecting layers are arranged at intervals; the height of the reflecting layer is smaller than that of the light emitting unit. When the reflection stratum is all arranged in every luminescence unit's periphery in this application, interval arrangement between two adjacent reflection stratum, the stress of every reflection stratum all toward respective center department retraction, makes the stress that produces because of each reflection stratum retraction can offset each other on the surface of drive base plate, thereby effectively reduces the warping probability of drive base plate. Simultaneously, the light that the side of luminescence unit sent also can obtain the reflection of reflection stratum to promote the luminous efficacy of backlight plate.
It should be understood that the application is not limited to the above examples, and that modifications or changes may be made by those skilled in the art based on the above description, and all such modifications and changes are intended to fall within the scope of the appended claims.
Claims (10)
1. A backlight panel, its characterized in that, it includes:
a drive substrate;
the plurality of light-emitting units are arranged on the driving substrate and are arranged in an array;
a reflective layer disposed on the driving substrate and arranged around the light emitting unit;
any two adjacent reflecting layers are arranged at intervals; the height of the reflecting layer is smaller than that of the light emitting unit.
2. The backlight panel of claim 1, further comprising:
and the transparent light-gathering layer covers the light-emitting surface of the light-emitting unit.
3. The backlight panel of claim 2, wherein the transparent light-gathering layer is disposed in a convex arc shape on a side away from the driving substrate.
4. The backlight panel of claim 2, further comprising:
and the reflection retaining wall is arranged around the periphery of the transparent light-gathering layer.
5. The backlight panel of claim 4, wherein the reflective dam comprises a white glue reflective dam.
6. The backlight panel of claim 5, wherein the height of the reflective dam is smaller than that of the transparent light-gathering layer, and the range of the height difference between the reflective dam and the transparent light-gathering layer is as follows: 30-200 μm.
7. The backlight panel of claim 1, wherein the height of the reflective layer has a range of values: 15-50 μm; the height of the light-emitting unit has a value range of: 50-150 μm.
8. The backlight panel of claim 1, wherein the light emitting units are bonded to pads of the driving substrate.
9. A backlight module comprising the backlight panel according to any one of claims 1 to 8 and an optical film; the optical film is arranged on the light-emitting side of the backlight panel.
10. A display device comprising the backlight module of claim 9 and a liquid crystal module; the liquid crystal module is arranged on the light-emitting side of the backlight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222848867.5U CN218446300U (en) | 2022-10-26 | 2022-10-26 | Backlight plate, backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222848867.5U CN218446300U (en) | 2022-10-26 | 2022-10-26 | Backlight plate, backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218446300U true CN218446300U (en) | 2023-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222848867.5U Active CN218446300U (en) | 2022-10-26 | 2022-10-26 | Backlight plate, backlight module and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218446300U (en) |
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2022
- 2022-10-26 CN CN202222848867.5U patent/CN218446300U/en active Active
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