CN218351083U - Lamp panel and MiliLED display device - Google Patents

Abstract

The application discloses a lamp panel and a MiliLED display device; the lamp panel comprises a substrate, a light-emitting piece and a lens; the light emitting piece is arranged on the substrate; the lens is covered on the light-emitting piece, the lens is provided with a bottom surface and a light-emitting surface, the bottom surface is connected with the substrate, and the light-emitting surface comprises a first light-emitting surface and a second light-emitting surface; the first light-emitting surface is arranged opposite to the bottom surface, is a curved surface which is sunken from the periphery to the center and is used for refracting or reflecting light irradiated to the first light-emitting surface by the light-emitting member; one end of the second light-emitting surface is connected with the bottom surface, the other end of the second light-emitting surface is connected with the first light-emitting surface, the second light-emitting surface is arranged around the light-emitting piece, the second light-emitting surface is a plane, and the second light-emitting surface is used for refracting light irradiated to the second light-emitting surface by the light-emitting piece; the included angle between the first light-emitting surface and the perpendicular line of the bottom surface is larger than 0 degree. This application can increase the light-emitting angle of light to the increase facula, thereby increase the interval of arranging of illuminating part on the base plate, reduce the quantity of illuminating part, thereby reduce the manufacturing cost of lamp plate.

Description

Lamp panel and MiliLED display device

Technical Field

The application belongs to the technical field of show, especially relates to a lamp plate and MiliLED display device.

Background

The television is an indispensable household appliance in daily life of people, and along with the continuous improvement of aesthetic requirements of people, the requirement of people on the television with ultrathin thickness is increased day by day.

In the related art, in order to meet the requirement of a user on a television with an ultra-thin thickness, manufacturers of the television often reduce the thickness design of the backlight module, particularly reduce the OD value (the distance between the diffusion plate and the lamp panel) of the backlight module, and the OD value is reduced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a lamp plate and MiliLED display device to the light-emitting angle of increase lamp plate makes backlight unit luminous even, reduces manufacturing cost.

First aspect, the embodiment of the present application provides a lamp panel, includes:

a substrate;

the light-emitting piece is arranged on the substrate; and

lens, lid are located the illuminating part, lens have bottom surface and play plain noodles, the bottom surface with the base plate is connected, it includes to go out the plain noodles:

the first light-emitting surface is arranged opposite to the bottom surface, is a curved surface which is sunken from the periphery to the center, and is used for refracting or reflecting the light irradiated to the first light-emitting surface by the light-emitting part; and

one end of the second light emitting surface is connected with the bottom surface, the other end of the second light emitting surface is connected with the first light emitting surface, the second light emitting surface is arranged around the light emitting element and is a plane, and the second light emitting surface is used for refracting light irradiated to the second light emitting surface by the light emitting element;

and an included angle between the second light-emitting surface and the vertical line of the bottom surface is greater than 0 degree.

Optionally, an included angle formed between the second light emitting surface and the bottom surface is an acute angle.

Optionally, the substrate includes a PCB and a reflection layer disposed on the PCB, and the reflection layer is used for reflecting light that is refracted to itself through the second light-emitting surface.

Optionally, the lens further includes a clearance groove, the clearance groove is disposed on the bottom surface and opposite to the light emitting element, and the bottom wall of the clearance groove forms the light incident surface.

Optionally, a recess is formed in the center of the first light emitting surface, a vertex angle is formed at a position of the light incident surface opposite to the recess, and the slope of the vertex angle is smaller than the slopes of other positions of the light incident surface.

Optionally, the lighting device further comprises a fluorescent film, and the fluorescent film covers the light emitting surface or the light incident surface.

Optionally, the lens further includes a positioning structure disposed on the bottom surface, and the lens is positioned on the substrate through the positioning structure;

the positioning structure comprises one of a pin and a socket.

Optionally, the bottom surface is bonded to the substrate, and the bottom surface is provided with a shading.

Optionally, the material of the lens is a transparent material with a refractive index of 1.4 to 1.6.

In a second aspect, the embodiment of the present application further provides a milliled display device, which includes a backlight module and a display module disposed on one side of the backlight module, wherein the backlight module includes a lamp panel as in any of the above embodiments.

In the embodiment of the application, since the first light emitting surface is a curved surface recessed from the periphery to the center, when the light emitted by the light emitting element irradiates the first light emitting surface, most of the light is refracted at the first light emitting surface, so that the light emitting angle of the light is increased, a small part of the light is reflected at the first light emitting surface, the light reflected by the first light emitting surface is reflected to the bottom surface, and the light is reflected to the first light emitting surface or the second light emitting surface again through the bottom surface and is emitted; the second light-emitting surface is a plane, and when the light emitted by the light-emitting element irradiates the second light-emitting surface, the light is refracted at the second light-emitting surface, so that the light-emitting angle of the light can be increased.

So, this application embodiment is through setting up the play plain noodles into first play plain noodles and second play plain noodles, make the light homoenergetic that the luminescent part shines first play plain noodles and second play plain noodles take place the refraction, thereby the light-emitting angle of light has been increased, when this lamp plate is applied to backlight unit, the facula that the luminescent part shines on backlight unit's diffuser plate increases, make also can fully mix the light under less mixed light distance, make backlight unit luminous even, because the facula that the luminescent part shines the diffuser plate increases, then can increase the interval of arranging of luminescent part on the base plate, thereby reduce the quantity of luminescent part, thereby reduce the manufacturing cost of lamp plate.

Moreover, this application embodiment is greater than 0 through the contained angle that sets up between the perpendicular line that sets up second play plain noodles and bottom surface, and the contained angle non-right angle between second play plain noodles and the bottom surface promptly because lens pass through injection moulding process shaping, so sets up for lens wholly has the draft, can make things convenient for the mould drawing of patterns.

Drawings

The technical solutions and advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural diagram of a lamp panel provided in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a lens of a lamp panel provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the related art, in order to meet the requirement of a user on a television with an ultra-thin thickness, manufacturers of the television often reduce the thickness design of the backlight module, particularly reduce the OD value (the distance between the diffusion plate and the lamp panel) of the backlight module, and the OD value is reduced.

In order to solve the above problems, embodiments of the present application provide a lamp panel and a milliled display device.

Referring to fig. 1, in the embodiment of the present application, a lamp panel 10 includes a substrate 11, a light emitting element 12, and a lens 13.

The substrate 11 includes a bottom plate and a circuit structure disposed on the bottom plate, wherein the circuit structure may be formed on the bottom plate by printing through a screen printing process or may be formed on the bottom plate through a photolithography process. The substrate 11 may be a rigid circuit board or a flexible circuit board.

The substrate 11 may be in the shape of a strip, a plate, or a comb, and the specific shape of the substrate 11 is not limited herein.

The light emitting member 12 is disposed on the substrate 11; it can be understood that the light emitting element 12 is fixed to the substrate 11 and electrically connected to the circuit structure of the substrate 11, and when the substrate 11 is powered on, the light emitting element 12 is powered on to emit light.

In the embodiment of the present application, in order to improve the brightness of the light emitting element 12, the light emitting element 12 is a MiniLED chip.

The MiniLED chip may be fixed on the substrate 11 through a COB (chip on board) packaging process, and electrically connected to the substrate 11.

Referring to fig. 1 and fig. 2, the lens 13 is disposed on the light emitting element 12, the lens 13 has a bottom surface 131 and a light emitting surface 132, the bottom surface 131 is connected to the substrate 11, and the light emitting surface 132 includes a first light emitting surface 133 and a second light emitting surface 134; the first light emitting surface 133 is opposite to the bottom surface 131, the first light emitting surface 133 is a curved surface recessed from the periphery to the center, and the first light emitting surface 133 is used for refracting or reflecting light irradiated to the first light emitting surface by the light emitting element 12; one end of the second light-emitting surface 134 is connected to the bottom surface 131, and the other end is connected to the first light-emitting surface 133, the second light-emitting surface 134 is disposed around the light-emitting element 12, the second light-emitting surface 134 is a plane, and the second light-emitting surface 134 is used for refracting light emitted by the light-emitting element 12.

Wherein, the center of the lens 13 is arranged right opposite to the center of the luminous element 12, so that the light spot emitted by the luminous element 12 is in a regular shape; the lens 13 is made of a transparent material so that the light emitted from the light emitting member 12 can pass through. Since the lens 13 is small in size and complicated in shape, the lens 13 is injection molded by an injection molding process.

As shown in fig. 1, since the first light emitting surface 133 is a curved surface recessed from the periphery to the center, when the light emitted from the light emitting element 12 irradiates the first light emitting surface 133, most of the light is refracted (such as the light a) at the first light emitting surface 133, so as to increase the light emitting angle of the light, and a small portion of the light is reflected at the first light emitting surface 133, and the light reflected by the first light emitting surface 133 is reflected to the bottom surface 131, and is reflected again to the first light emitting surface 133 or the second light emitting surface 134 through the bottom surface 131 to be emitted.

The second light-emitting surface 134 is a plane, and when the light emitted from the light-emitting element 12 irradiates the second light-emitting surface 134, the light is refracted (such as the light b) at the second light-emitting surface 134, so that the light-emitting angle of the light can also be increased.

So, this application embodiment sets up to first play plain noodles 133 and second play plain noodles 134 through going out plain noodles 132, make light that light-emitting component 12 shines first play plain noodles 133 and second play plain noodles 134 homoenergetic take place to refract, thereby the light-emitting angle of light has been increased, when this lamp plate 10 is applied to backlight unit, light-emitting component 12 shines the facula increase on backlight unit's diffuser plate, make also can fully mix light under less mixed light distance, make backlight unit luminous even, because light-emitting component 12 shines the facula of diffuser plate to become big, then can increase the interval of arranging of light-emitting component 12 on base plate 11, thereby reduce the quantity of light-emitting component 12, thereby reduce the manufacturing cost of lamp plate 10.

As shown in fig. 1, an included angle between the second light emitting surface 134 and a perpendicular line of the bottom surface 131 is greater than 0 °.

It can be understood that, by setting the included angle between the perpendicular lines of the second light emitting surface 134 and the bottom surface 131 to be greater than 0 °, that is, the included angle between the second light emitting surface 134 and the bottom surface 131 is not a right angle, and since the lens 13 is formed by an injection molding process, the lens 13 is so arranged, so that the whole lens 13 has a draft, and the mold can be conveniently demolded.

Further, in the embodiment of the present application, as shown in fig. 2, an included angle formed between the second light emitting surface 134 and the bottom surface 131 is an acute angle.

It can be understood that, by setting the included angle formed between the second light emitting surface 134 and the bottom surface 131 to be an acute angle, that is, the second light emitting surface 134 is an inclined surface inclined upward relative to the substrate 11, rather than an inclined surface inclined downward relative to the substrate 11, when the light emitted from the light emitting element 12 is irradiated to the second light emitting surface 134 and refracted, a majority of the light is refracted toward the direction away from the substrate 11, and a minority of the light is refracted toward the substrate 11, that is, a majority of the light is emitted outward, and a minority of the light is reflected onto the substrate 11.

In order to fully utilize the light emitted by the light emitting element 12 and avoid light loss, in the embodiment of the present application, referring to fig. 1, the lamp panel 10 further includes a reflector 14, the reflector 14 is covered on the substrate 11, the reflector 14 is provided with a through hole for the light emitting element 12 to pass through, and the reflector 14 is used for reflecting the light refracted to itself through the second light emitting surface 134.

Because the partial light that illuminating part 12 shines to second play plain noodles 134 is towards substrate 11 direction refraction (like light c in fig. 1), through being equipped with reflector plate 14 at substrate 11 upper cover, make this part shine to reflector plate 14 towards the light that substrate 11 direction was refracted, the reflection of process reflector plate 14 is shone away from substrate 11 direction, thus, this application embodiment has improved the luminance of lamp plate 10 through setting up the light that reflector plate 14 make full use of illuminating part 12 sent, avoid the light loss.

The reflective sheet 14 may be made of a material with high reflectivity, or formed by coating a material with high reflectivity on a common substrate, or made of a substrate with a specular reflection function.

Of course, in other embodiments of the present application, a reflective coating (e.g., a white ink layer) may be coated on the substrate 11.

Referring to fig. 1 and fig. 2, in the embodiment of the present application, the lens 13 further includes a clearance groove 135, the clearance groove 135 is disposed on the bottom surface 131 and opposite to the light emitting element 12, and a bottom wall of the clearance groove 135 forms a light incident surface 136.

As shown in fig. 1, the center of the clearance groove 135 is opposite to the center of the light emitting member 12, so that the light spot emitted from the light emitting member 12 has a regular shape.

It can be understood that, by providing the empty-avoiding groove 135 on the bottom surface 131 of the lens 13, the light-emitting element 12 can be accommodated in the empty-avoiding groove 135, and the bottom wall of the empty-avoiding groove 135 forms the light-incident surface 136, so that most of the light emitted by the light-emitting element 12 can irradiate the light-emitting surface 132 through the light-incident surface 136, that is, most of the light emitted by the light-emitting element 12 is emitted through the lens 13.

Moreover, the light that the light-emitting component 12 sent shines to going into plain noodles 136 and takes place refraction for the first time to the first side has increased the light-emitting angle of light, the light after going into plain noodles 136 refraction shines to going out plain noodles 132 and takes place refraction for the second time, thereby the light-emitting angle of light has further been increased, this application embodiment forms into plain noodles 136 through setting up clearance groove 135 promptly, make the light that the light-emitting component 12 sent take place refraction twice through lens 13, very big increase the light-emitting angle of light.

Referring to fig. 2, in the embodiment of the present application, a recess is formed in the center of the first light emitting surface 133, a vertex angle 137 is formed at a position of the light incident surface 136 opposite to the recess, and a slope of the vertex angle 137 is smaller than that of other positions of the light incident surface 136.

Specifically, as shown in fig. 2, the clearance groove 135 is tapered as a whole.

Because most light that goes out the plain noodles 132 and send the illuminating part 12 jets out with the wide-angle, make the luminance in facula middle part lower (the facula is peripheral to be brighter than the facula middle part), cause the facula to form the alternate diaphragm of light and shade easily, to this, in this application embodiment, apex angle 137 department has great slope (still is less than the slope of going into other positions of plain noodles 136), apex angle 137 department designs sharper promptly, make the illuminating part 12 shine to the refraction angle of the low-angle light of apex angle 137 department little (like light d in fig. 1), the light angle increase of the light of avoiding shooting out from apex angle department is too big, thereby avoid the luminance in the facula middle part to hang down, avoid the facula to produce the alternate diaphragm of light and shade.

In the embodiment of the present invention, the lamp panel 10 further includes an optical film, and each lens 13 has an optical film (not shown), and the optical film covers the light emitting surface 132 or the light incident surface 136.

Wherein the optical film may include a fluorescent film. Since the current light emitting chip is mainly a blue light emitting chip, a fluorescent film is required to be disposed to realize that the lamp panel 10 emits white light, and the blue light emitted by the light emitting element 12 irradiates the fluorescent film to become white light.

In other embodiments, the optical film may also include a DBR film (distributed bragg mirror) or a brightness enhancement film.

It can be understood that, for large display devices such as televisions, the number of the light emitting elements 12 on the lamp panel 10 is large, and the number of the corresponding lenses 13 is large, so as to fix the lenses 13 on the substrate 11 conveniently, the lenses 13 further include a positioning structure (not shown in the figure), the positioning structure is disposed on the bottom surface 131, and the lenses 13 are positioned on the substrate 11 through the positioning structure.

After the lens 13 is positioned on the substrate 11 by the positioning structure, it is firmly adhered to the substrate 11 by glue.

The positioning structure comprises one of a bolt and a jack, the lens 13 can be conveniently positioned by arranging the positioning structure at the bottom of the lens 13, and the center of the lens 13 can be ensured to just face the center of the luminous piece 12; moreover, the difficulty in positioning the lens 13 can be reduced, and the installation efficiency of the lens 13 can be improved.

In another embodiment of the present application, the bottom surface 131 is bonded to the substrate 11.

It can be understood that, for the lens 13 with a small volume, the bottom surface 131 is not convenient for designing a positioning structure, that is, the lens 13 is not provided with a positioning structure and is directly adhered to the substrate 11 through the bottom surface 131, and an adhesive layer is formed between the bottom surface 131 and the substrate 11.

In this case, the bottom surface 131 is provided with a ground pattern to improve the adhesion between the lens 13 and the substrate 11. Through setting up the shading at bottom surface 131, increased the roughness of bottom surface 131 to a certain extent for glue infiltrates in the clearance of shading, thereby has strengthened the fastness that lens 13 and base plate 11 bonded, prevents that lens 13 from droing easily.

In the embodiment of the present application, the material of the lens 13 is a transparent material with a refractive index between 1.4 and 1.6.

The embodiment of the application also provides a MiliLED display device, including backlight unit and the display module who locates backlight unit one side, backlight unit includes lamp plate 10 based on above-mentioned design concept.

Specifically, backlight unit includes backplate, lamp plate 10 and diffuser plate, and on lamp plate 10 was fixed in the backplate, diffuser plate and lamp plate 10 relative interval set up, the diffuser plate had the effect of diffusion light to the light diffusion that sends lamp plate 10, make the light that backlight unit sent even.

Because lamp plate 10 adopts lamp plate 10 based on above-mentioned design concept, this lamp plate 10 is through setting up a play plain noodles 132 into first play plain noodles 133 and second play plain noodles 134, make luminous piece 12 shine first play plain noodles 133 and the refraction of second play plain noodles 134 light homoenergetic, thereby the light-emitting angle of light has been increased, when this lamp plate 10 is applied to backlight unit, luminous spot that luminous piece 12 shines on backlight unit's diffuser plate increases, make also can fully mix light under less mixed light distance, make backlight unit give off light evenly, thereby guarantee display device's display effect, because luminous piece 12 shines the luminous spot of diffuser plate and becomes big, then can increase the interval of arranging of luminous piece 12 on base plate 11, thereby reduce the quantity of luminous piece 12, thereby reduce lamp plate 10's manufacturing cost, and then reduce display device's manufacturing cost.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

The lamp panel and the milliled display device provided in the embodiments of the present application are described in detail above, and specific examples are applied herein to explain the principles and embodiments of the present application, and the description of the embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and the application scope may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. The utility model provides a lamp plate, its characterized in that includes:

a substrate;

the light-emitting piece is arranged on the substrate; and

lens, lid are located the illuminating part, lens have bottom surface and play plain noodles, the bottom surface with the base plate is connected, it includes to go out the plain noodles:

the first light-emitting surface is arranged opposite to the bottom surface, is a curved surface which is sunken from the periphery to the center, and is used for refracting or reflecting the light irradiated to the first light-emitting surface by the light-emitting part; and

one end of the second light emitting surface is connected with the bottom surface, the other end of the second light emitting surface is connected with the first light emitting surface, the second light emitting surface is arranged around the light emitting element and is a plane, and the second light emitting surface is used for refracting light irradiated to the second light emitting surface by the light emitting element;

and an included angle between the second light-emitting surface and the vertical line of the bottom surface is greater than 0 degree.

2. The lamp panel of claim 1, wherein an included angle formed between the second light emitting surface and the bottom surface is an acute angle.

3. The lamp panel of claim 1, wherein the lamp panel further comprises a reflector plate, the reflector plate covers the substrate, the reflector plate is provided with a via hole for the light-emitting member to pass through, and the reflector plate is used for reflecting light refracted to the reflector plate through the second light-emitting surface.

4. The lamp panel of claim 1, wherein the lens further includes a clearance groove, the clearance groove is disposed on the bottom surface and opposite to the light-emitting element, and a bottom wall of the clearance groove forms a light incident surface.

5. The lamp panel of claim 4, wherein a recess is formed in the center of the first light emitting surface, a vertex angle is formed at a position of the light incident surface opposite to the recess, and a slope of the vertex angle is smaller than slopes of other positions of the light incident surface.

6. The lamp panel of claim 4, further comprising an optical film covering the light-emitting surface or the light-incident surface.

7. The lamp panel according to any one of claims 1 to 6, wherein the lens further comprises a positioning structure, the positioning structure is disposed on the bottom surface, and the lens is positioned on the substrate through the positioning structure;

the positioning structure comprises one of a pin and a socket.

8. A lamp panel according to any one of claims 1 to 6, wherein the bottom surface is bonded to the base plate, and the bottom surface is provided with a shading.

9. A lamp panel as claimed in any one of claims 1 to 6, wherein the lens is made of a transparent material having a refractive index of 1.4 to 1.6.

10. A MiliLED display device, characterized in that includes backlight unit and locates the display module assembly of backlight unit one side, backlight unit includes the lamp plate of any one of claims 1 to 9.

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