CN212161179U

CN212161179U - Backlight structure and display panel thereof

Info

Publication number: CN212161179U
Application number: CN202021014593.4U
Authority: CN
Inventors: 黄成斯; 周充祐
Original assignee: Chongqing Kangjia Photoelectric Technology Research Institute Co Ltd
Current assignee: Chongqing Kangjia Photoelectric Technology Research Institute Co Ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2020-12-15
Anticipated expiration: 2030-06-05

Abstract

The utility model discloses a structure in a poor light and display panel thereof, wherein, include: the LED lamp comprises a back plate, a diffusion plate and a plurality of lamp panels, wherein the diffusion plate comprises a plane part and a curved surface part; the lamp panel is arranged between the back plate and the diffusion plate; plane portion with the lamp plate is parallel, curved surface portion is in orthographic projection on the lamp plate and adjacent two the clearance coincidence or the partial coincidence of lamp plate. The utility model discloses a diffuser plate shape is special, sets up curved surface portion, forms similar convex lens's effect, takes place the refraction when making the light of lamp plate transmission propagate the surface of curved surface portion to adjustment light propagation path makes light as far as possible even when launching from the diffuser plate upper surface each, reduces the uneven condition of brightness in each position of structure in a poor light.

Description

Backlight structure and display panel thereof

Technical Field

The utility model relates to a show technical field, especially relate to a structure in a poor light and display panel thereof.

Background

At present, the technology for displaying images in daily life of people is developing faster and faster, and with the development of the display industry, a Micro light emitting diode (Micro LED) is rising fast. Compared with the existing Organic Light-Emitting Diode (OLED) technology, the Micro LED display device has the advantages of higher brightness, better Light-Emitting efficiency and lower power consumption.

However, when a backlight structure is manufactured, a splicing technology is usually used, namely a plurality of smaller lamp panels are manufactured, a large number of Micro LEDs are integrated on the lamp panels, and then the plurality of lamp panels are spliced into a larger lamp panel on a metal back plate; and then a diffusion plate and a brightness enhancement sheet are sequentially arranged on the larger lamp panel, and finally a plastic frame is arranged around the spliced backlight structure. But adopt this kind of mode can have the gap between two adjacent lamp plates, lead to the uneven phenomenon of bright dark in concatenation department easily.

Accordingly, the prior art is yet to be improved and developed.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned prior art not enough, the utility model aims at providing a structure in a poor light and display panel thereof, when aiming at solving the concatenation of polylith lamp plate, can have the gap between two adjacent lamp plates, leads to the uneven problem of splice department brightness easily.

The technical scheme of the utility model as follows:

a backlight structure, comprising: the LED lamp comprises a back plate, a diffusion plate and a plurality of lamp panels, wherein the diffusion plate comprises a plane part and a curved surface part; the lamp panel is arranged between the back plate and the diffusion plate; plane portion with the lamp plate is parallel, curved surface portion is in orthographic projection on the lamp plate and adjacent two the clearance coincidence or the partial coincidence of lamp plate. The propagation path of light at the gap is adjusted through the curved surface part, so that the problem of uneven brightness at each position of the backlight structure is reduced.

Optionally, the curved surface portion is hemispherical in shape. All the surface areas of the curved surface part can be effectively utilized, and the effect of adjusting light is improved.

Optionally, along the length direction of the gap, a plurality of the curved surface portions are arranged, and the distance between every two adjacent curved surface portions is 15-25 mm. Maintain the function of good adjustment light path angle, reduce processing cost simultaneously.

Optionally, the section of the curved surface part is a semicircular ring. The integral three-dimensional structure of the curved surface part is semi-cylindrical, so that the processing and forming are convenient, and the brightness uniformity of the backlight structure is ensured.

Optionally, a cross-sectional diameter of the curved portion is greater than or equal to a width of the gap. The light path angles of the positions as many as possible can be adjusted, and the possibility of oblique light emission is reduced.

Optionally, the planar portion and the curved portion are integrally formed. The diffusion plate has no connecting gap, prevents the possibility of gap light leakage, and has stable integral structure.

Optionally, the back plate is a metal back plate. The metal material has high strength and good shock resistance, and can protect the lamp panel from being damaged difficultly.

Optionally, the backlight structure further includes a lower brightness enhancement film and an upper brightness enhancement film sequentially disposed on the diffusion plate. The light refracted by the diffusion plate is further refracted, and all components on the light surface are concentrated towards the normal direction, so that the brightness of the light emitted by the backlight structure is improved.

Optionally, the backlight structure further comprises a side frame mounted at an edge of the back plate for supporting the diffusion plate; the side frame deviates from one side of lamp plate is provided with the bearer bar, the bearer bar with side frame integrated into one piece. The diffusion plate and the lamp panel are separated by the side frame, so that collision friction between the diffusion plate and the lamp panel is reduced, and the service life is prolonged; the protective frame can reduce dust and sundries in external air to enter the backlight structure and prevent side light leakage.

The utility model also discloses a display panel, wherein, include as above arbitrary the structure of being shaded. The light-emitting effect of the display panel is effectively improved, and dark stripes are reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an exploded view of a display panel according to the present invention;

fig. 2 is a schematic cross-sectional view of a partial structure of a display panel according to the present invention;

fig. 3 is a schematic structural diagram of a diffusion plate of a display panel according to the present invention;

fig. 4 is a schematic cross-sectional view of an edge portion of a display panel according to the present invention.

10, a back plate; 20. a lamp panel; 30. a diffusion plate; 301. a planar portion; 302. a curved surface portion; 40. a gap; 50. a lower brightness enhancement film; 60. an upper brightness enhancement film; 70. a side frame; 80. and (4) a protective frame.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the prior art, a Micro LED display device has a miniaturized LED array structure, has self-luminous display characteristics, and has technical advantages of all solid state, long service life, high brightness, low power consumption, small volume, ultra-high resolution, applicability to extreme environments such as high temperature or radiation, and the like. Compared with the OLED technology which is self-luminous, the Micro LED has the advantages of high efficiency, long service life, relative stability due to the fact that the material is not easily influenced by the environment, and the phenomenon of ghost shadow can be avoided.

The general Micro LED chip has small size, in order to meet the enough screen size, a plurality of Micro LED chips are assembled on one module, the side surface of each chip inevitably emits sidelight, and the light emitted by the adjacent Micr LED chips is interfered; and gaps at the splicing position can cause the phenomenon of uneven brightness, so that the overall light emitting quality of the backlight structure is influenced.

Referring to fig. 1 and 2, the utility model discloses a backlight structure, wherein, include: the LED lamp comprises a back plate 10, a diffusion plate 30 and a plurality of lamp panels 20, wherein the diffusion plate 30 comprises a plane part 301 and a curved surface part 302; the lamp panel 20 is disposed between the back plate 10 and the diffusion plate 30; plane portion 301 with lamp plate 20 is parallel, curved surface portion 302 is in orthographic projection on lamp plate 20 and adjacent two clearance 40 coincidence or the partial coincidence of lamp plate 20.

The utility model discloses a diffuser plate 30 shape is special, plane portion 301 and lamp plate 20 parallel arrangement, when lamp plate 20 is luminous, just to the even printing opacity of plane portion 301 of lamp plate 20, and the position of clearance 40 between two lamp plates 20, the light of directive diffuser plate 30 all is sent from lamp plate 20 goes up the slant, so it is mixed and disorderly, position at relative clearance 40 sets up bellied curved surface portion 302, form similar convex lens's effect, the incident angle is not 90 when the light that makes the lamp plate 20 transmission to curved surface portion 302's surface, can take place the refraction promptly, thereby adjustment light propagation path, direction of propagation is even as far as possible when making light follow diffuser plate 30 upper surface and jet out, reduce the structure of being shaded each position and shine dark inhomogeneous bad phenomenon.

Specifically, the curved surface portion 302 is shaped like a hemisphere. The inclination degree of the light rays emitted in different directions is different, the radians of all the positions of the hemispherical surface are different, the light rays emitted in all the directions are emitted into the curved surface part 302 from different positions on the surface of the curved surface part 302 at different refraction angles and are emitted in the same or approximately similar propagation directions, the adjustment of light ray propagation is completed, all the convex parts of the hemispherical curved surface part 302 have the adjustment effect, and the effective area of adjusting the light rays is increased. And the angle that the marginal portion light ray of clearance 40 between two lamp plates 20 need be adjusted is less than the mid portion, and semicircular arch is just more close to marginal portion radian more and is littleer, and adjustable angle is also littleer, corresponds the distribution of the light path that lamp plate 20 jetted out, and the rational utilization bellying reaches the effect of efficient adjustment light path.

As shown in fig. 3, the curved surface portions 302 are provided in plural numbers, and are sequentially arranged at positions corresponding to the gaps 40 between the two lamp panels 20 on the diffusion plate 30. When polylith lamp plate 20 splices, form many clearances 40, correspond on every clearance 40 on diffuser plate 30 and set up a plurality of curved surface portions 302, make the holistic light-emitting effect of structure in a poor light good, reduce the inhomogeneous phenomenon of brightness of whole vision.

Further, along the length direction of the gap 40, the distance between two adjacent curved surface portions 302 is 15-25 mm. Firstly, the curved surface parts 302 have certain width and length, if two adjacent curved surface parts 302 are arranged too close to each other, the process is not finished easily, after the first curved surface part 302 is formed, when the second curved surface part 302 is formed, the first curved surface part 302 is easy to contact, the shape of the first curved surface part 302 is changed, and the function of adjusting the light path is weakened; secondly, multiple operations are required, increasing the workload and increasing the time cost. Certainly, the light path can not be adjusted too much by the curved surface portion 302, the adjustable light path range of the curved surface portion is limited, and if the light path is too much dispersed, dark stripes appear at the position of the gap 40 between the lamp panels 20, and the dark stripes are just changed into point-like dark shadows from stripes with alternate light and shade.

As another embodiment of the present disclosure, the cross section of the curved surface portion 302 is a semicircular ring. When the section of the curved surface part 302 is a semicircular ring, the three-dimensional structure of the curved surface part is a semi-cylindrical shape, and the curved surface part can be manufactured by only aligning to the gap 40 between two adjacent lamp panels 20 and completing the punching at one time, so that the method is convenient and fast, operation steps are saved, and production is accelerated. In addition, the whole curved surface part 302 is semi-cylindrical, the radius of the curved surface part is equal to the width of the gap 40 between the lamp panels 20, the curved surface part 302 can cover the whole area which is just opposite to the gap 40 between the lamp panels 20, and the possibility of leaking part of oblique light is reduced.

Further, the cross-sectional diameter of the curved surface portion 302 is greater than or equal to the width of the gap 40. The illumination that the position that corresponds lamp plate 20 clearance 40 on diffuser plate 30 received all is the slope, does not have the straight line to shine, so all need adjust the light path, and the arch of curved surface portion 302 occupies whole clearance 40 in the width direction, is favorable to adjusting as much light as possible.

Specifically, the flat portion 301 and the curved portion 302 are integrally formed. The plane part 301 and the curved surface part 302 are integrally formed by using a die, so that the step of aligning and mounting is omitted, and labor is saved; when a backlight structure with a plurality of lamp panels 20 being used together is applied, a flat diffusion plate 30 can be manufactured firstly by integral forming, and then the curved surface part 302 is processed on the diffusion plate 30, so that the height of the plane part 301 corresponding to each lamp panel 20 can be ensured to be consistent, and the light output of the backlight structure is relatively uniform; and there is not the joint gap between curved surface portion 302 and the plane portion 301, can not leak light, and curved surface portion 302 and plane portion 301 can not separate or relative shift yet, keeps the long-term stability of structure.

Specifically, the back plate 10 is a metal back plate 10. The metal material texture is harder, and rigidity is good, intensity is good, and shock resistance is good, non-deformable, and lamp plate 20 sets up on metal backplate 10, receives backplate 10 protection, and is not fragile.

Specifically, the backlight structure further includes a lower light enhancement sheet 50 and an upper light enhancement sheet 60 sequentially disposed on the diffusion plate 30. The upper and lower brightness enhancement films 50 are used in cooperation to further refract the light refracted by the diffusion plate 30 and concentrate the components on the light surface in the normal direction, thereby improving the brightness of the light emitted from the backlight structure.

Referring to fig. 4, the backlight assembly further includes a side frame 70 mounted at an edge of the back plate 10 for supporting the diffusion plate 30; side frame 70 deviates from one side of lamp plate 20 is provided with protective frame 80, protective frame 80 with side frame 70 integrated into one piece. The diffusion plate 30 is arranged above the lamp panel 20, in order to reduce contact and prevent abrasion and collision, the side frame 70 is arranged, the thickness of the side frame is larger than that of the lamp panel 20, the diffusion plate 30 is arranged on the upper surface of the side frame 70 and keeps a certain distance with the lamp panel 20, and the service lives of the lamp panel 20 and the diffusion plate 30 are prolonged; in addition, the protection frame 80 is arranged outside the side frame 70, and the protection frame 80 protects the side frame 70, the lamp panel 20, the diffusion plate 30, the lower light intensifying sheet 50, the upper light intensifying sheet 60 and other structures, so that external dust and impurities are prevented from entering the backlight structure, the influence on the light emitting effect of the backlight structure is reduced, and meanwhile, light emitted by the lamp panel 20 can be prevented from being refracted and then leaking out of the diffusion plate 30, the lower light intensifying sheet 50 or the side edge of the upper light intensifying sheet 60.

Further, the side frame 70 and the protection frame 80 may be plastic frames. The plastic is light in weight, good in toughness, easy to process and stable in chemical performance, and can be stably and permanently used as a protection structure of the lamp panel 20, the diffusion plate 30, the lower light intensifying sheet 50, the upper light intensifying sheet 60 and the like.

As another embodiment of the present invention, a display panel is further disclosed, wherein the backlight structure includes the above-mentioned structure.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A backlight structure, comprising:

a back plate;

a diffuser plate including a planar portion and a curved portion;

the lamp panels are arranged between the back plate and the diffusion plate;

wherein, plane portion with the lamp plate is parallel, curved surface portion is in orthographic projection on the lamp plate and adjacent two the clearance coincidence or the partial coincidence of lamp plate.

2. The backlight structure as claimed in claim 1, wherein the curved portion is shaped as a hemisphere.

3. The backlight structure as claimed in claim 2, wherein the curved portions are disposed in plural along the length direction of the gap, and the distance between two adjacent curved portions is 15-25 mm.

4. The backlight structure as claimed in claim 1, wherein the curved portion has a semicircular cross section.

5. The backlight structure according to any one of claims 1 to 4, wherein the cross-sectional diameter of the curved portion is greater than or equal to the width of the gap.

6. The backlight structure according to any one of claims 1 to 4, wherein the planar portion is integrally formed with the curved portion.

7. The backlight structure as claimed in claim 6, wherein the back plate is a metal back plate.

8. The backlight structure of claim 6, further comprising a lower brightness enhancement film and an upper brightness enhancement film sequentially disposed on the diffuser plate.

9. The backlight structure according to claim 8, further comprising:

a side frame installed at an edge of the back plate for supporting the diffusion plate;

the side frame deviates from one side of lamp plate is provided with the bearer bar, the bearer bar with side frame integrated into one piece.

10. A display panel comprising the backlight structure of any one of claims 1 to 9.