CN112562499A

CN112562499A - Ultra-thin Mini LED backlight with high degree of consistency

Info

Publication number: CN112562499A
Application number: CN202011427468.0A
Authority: CN
Inventors: 李云海; 江腾龙; 刘玉清; 周芳青; 仇泽军; 陈诚; 陈义
Original assignee: Dongguan Depute Electronics Co ltd
Current assignee: Dongguan Depute Electronics Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-03-26

Abstract

The invention discloses an ultrathin Mini LED backlight source with high uniformity, which comprises a frame body bottom plate, wherein a Mini LED substrate is arranged on the frame body bottom plate, a plurality of Mini LEDs are arranged on the Mini LED substrate, the Mini LEDs are electrically connected with the Mini LED substrate, a point-to-point microstructure diffusion film is arranged above the Mini LEDs, a gap is formed between the Mini LEDs and the point-to-point microstructure diffusion film, the point-to-point microstructure diffusion film is provided with a diffusion film, the diffusion film is provided with a brightness enhancement film, and the brightness enhancement film is provided with a shading double-sided adhesive layer.

Description

Ultra-thin Mini LED backlight with high degree of consistency

Technical Field

The invention relates to the technical field of backlight sources, in particular to an ultrathin Mini LED backlight source with high uniformity.

Background

Light Emitting Diodes (LEDs) are semiconductor electronic components that convert electrical energy into Light energy, and are widely used in the fields of lighting, display screens, signal lamps, backlights, toys, etc. because they have the characteristics of small size, long service life, rich and colorful colors, and low energy consumption.

With the increasing requirements of the electronic display screen market on ultra-thin, high screen ratio and high color saturation, the Mini LED backlight with zero edge width and 100% color saturation comes into play.

The Mini LED is also called a sub-millimeter light emitting diode, the size of the Mini LED is usually 80-200 microns, the Mini LED is a new generation of LED technology, the characteristics of high efficiency, high reliability, high brightness and fast response time of the small-spacing LED are adopted, and the smaller-spacing LED has lower power consumption and lower cost.

At present, because of the laminating technology and the cost consideration of the Mini LED, the pitch angle between the Mini LEDs is large, so that two defects appear: one is that: if the LED is close to the diffusion film on the LED, a blind area can be formed between the LED gaps, and the problem of uneven brightness of backlight display is solved; the other situation is that: if the display unevenness is avoided, a blind area between the LED and the LED must be avoided, a small gap is required between the light guide film material such as diffusion and the like and the LED, the whole thickness of the backlight is required to be increased, and the requirement is contrary to the requirement of the electronic display product on the ultrathin thickness in the current market.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides an ultrathin Mini LED backlight source with high uniformity, which effectively improves the brightness uniformity of the Mini LED backlight source, improves the use experience and the product quality of customers, and improves the product attractiveness and the use effect of the customers on the premise of ensuring the ultrathin thickness.

In order to achieve the purpose, the invention provides an ultrathin Mini LED backlight source with high uniformity, which comprises a frame body bottom plate, wherein a Mini LED substrate is arranged on the frame body bottom plate, a plurality of Mini LEDs are arranged on the Mini LED substrate, the Mini LEDs are electrically connected with the Mini LED substrate, a point-to-point microstructure diffusion film is arranged above the Mini LEDs, a gap is formed between the Mini LEDs and the point-to-point microstructure diffusion film, the point-to-point microstructure diffusion film is provided with a diffusion film, a brightness enhancement film is arranged on the diffusion film, and a shading double-sided adhesive layer is arranged on the brightness enhancement film.

Preferably, the point-to-point microstructure diffusion film is provided with a plurality of first microstructure dots, the area of the first microstructure dots is smaller than that of the Mini LED, the first microstructure dots are large in area and face the Mini LED, the first microstructure dots correspond to the Mini LED in a one-to-one mode, and a plurality of second microstructure dots with small areas are arranged on two sides of each first microstructure dot.

Preferably, the length of the first microstructure dot is greater than that of the second microstructure dot, the height of the first microstructure dot is greater than that of the second microstructure dot, the area of the first microstructure dot is greater than that of the second microstructure dot, and the length of the second microstructure dot is shorter as the second microstructure dot is farther from the first microstructure dot.

Preferably, the gap comprises a light emitting area of the Mini LED, and a blind area is arranged on one side of the light emitting area.

Preferably, the frame bottom plate is a stainless steel member.

Compared with the prior art, the invention has the beneficial effects that:

the invention is characterized in that a point-to-point microstructure diffusion film is arranged on a Mini LED, a plurality of first microstructure mesh points are arranged on the point-to-point microstructure diffusion film, the first microstructure mesh points correspond to the Mini LED one by one, the light-emitting area on the front side of the Mini LED is partially shielded through the one-to-one design, light is guided into a blind area between the Mini LED and the Mini LED, a plurality of second microstructure mesh points are also arranged above the blind area, the second microstructure mesh points are smaller in area and more distributed than the first microstructure mesh points, light guided into the blind area is further uniformly dispersed, the overall brightness and uniformity of a backlight source can be improved, the light is distributed more uniformly after passing through the point-to-point microstructure diffusion film, the uniform light is dispersed and conducted through the diffusion film again, the light is dispersed more uniformly, and the uniformity of the light is further improved, the brightness uniformity of the Mini LED backlight source is effectively improved, the use experience and the product quality of customers are improved, and the attractiveness and the use effect of the users are improved on the premise of ensuring the ultrathin thickness.

Drawings

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

FIG. 1 is a schematic cross-sectional view of an ultra-thin Mini LED backlight with high uniformity according to the present invention;

FIG. 2 is an enlarged schematic view of I in FIG. 1;

fig. 3 is a schematic structural diagram of a light emitting area and a blind area of an ultra-thin Mini LED backlight source with high uniformity according to the present invention.

The figure includes:

the LED light source comprises a frame body base plate 1, a frame body base plate 2-Mini LED base plate, a frame body base plate 3-Mini LED, a point-to-point microstructure diffusion film 4, a gap 6, a diffusion film 5, a brightness enhancement film 7, a shading double-sided adhesive layer 8, a first microstructure mesh point 41, a second microstructure mesh point 42, a light emitting area 61 and a blind area 62.

Detailed Description

The technical solutions 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 apparent that the described embodiments are one embodiment of the present invention, and not all embodiments of the present invention. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides an ultra-thin Mini LED backlight with high uniformity, which includes a frame bottom plate 1, wherein the frame bottom plate 1 is a stainless steel member, and the frame bottom plate 1 is used as a placement bottom plate for placing various electronic components on the backlight and bearing the weight of the backlight.

The frame body bottom plate 1 is provided with a Mini LED substrate 2, the Mini LED substrate 2 is provided with a plurality of Mini LEDs 3, the Mini LED3 is electrically connected with the Mini LED substrate 2, the Mini LED3 emits light, the Mini LED substrate 2 provides power for the Mini LED3, a point-to-point microstructure diffusion film 4 is arranged above the Mini LED3, the Mini LED3 is not overlapped with the point-to-point microstructure diffusion film 4, a gap 6 is arranged between the Mini LED3 and the point-to-point microstructure diffusion film 4, the microstructure point-to-point diffusion film 4 carries out first dispersion on the light emitted by the Mini LED3, concentrated large light source bright spots are dispersed into small light source bright spots to form uniform light, the point-to-point microstructure diffusion film 4 is provided with a diffusion film 5, the diffusion film 5 carries out second dispersion on the light emitted by the Mini LED3 to further disperse the small light source bright spots, form even light, diffusion barrier 5 facial make-up is equipped with membrane 7 that adds lustre to, membrane 7 that adds lustre to promotes and optimizes the even light to luminance, finally realizes hi-lite and high degree of consistency, membrane 7 facial make-up that adds lustre to is equipped with shading double faced adhesive tape 8.

The point-to-point microstructure diffusion film 4 is provided with a plurality of first microstructure dots 41, the first microstructure dots 41 are in one-to-one correspondence with the Mini LED3, the area of the first microstructure dots 41 is smaller than that of the Mini LED3, the first microstructure dots 41 are large in area and face the Mini LED3, a plurality of second microstructure dots 42 with small area are arranged on two sides of the first microstructure dots 41, the first microstructure dots 41 partially shade the front light emitting region 61 of the Mini LED3 through the one-to-one correspondence design, large light source bright spots are prevented from being formed, light is guided into a dead zone 62 between the Mini LED3 and the Mini LED3, a plurality of second microstructure dots 42 are arranged above the dead zone 62, the second microstructure dots 42 are smaller in area than the first microstructure dots 41 and more distributed, and the light guided into the dead zone 62 is further uniformly dispersed, the LED backlight module can improve the overall brightness and uniformity of a backlight source, light is distributed uniformly after passing through the point-to-point microstructure diffusion film 4, uniform light is dispersed and conducted again through the diffusion film 5, the light is dispersed more uniformly, the uniformity of the light is further improved, the target brightness and uniformity are achieved, the brightness of the light with the target brightness and uniformity is improved and optimized through the brightness enhancement film 7, and finally the high brightness and the high uniformity are achieved.

The length of the first microstructure mesh point 41 is greater than that of the second microstructure mesh point 42, the second microstructure mesh point 42 is located in the dead zone 62, large-scale shielding is not needed, light guided into the dead zone 62 is only needed to be dispersed, the height of the first microstructure mesh point 41 is greater than that of the second microstructure mesh point 42, the area of the first microstructure mesh point 41 is greater than that of the second microstructure mesh point 42, and the length of the second microstructure mesh point 42 is shorter as the second microstructure mesh point 42 is farther from the first microstructure mesh point 41.

The gap 6 comprises a light emitting area 61 of the Mini LED3, and a blind area 62 is arranged on one side of the light emitting area 61.

In conclusion, the beneficial effects of the invention are as follows:

the point-to-point microstructure diffusion film 4 is arranged on a Mini LED3, a plurality of first microstructure dots 41 are arranged on the point-to-point microstructure diffusion film 4, the first microstructure dots 41 correspond to the Mini LED3 one by one, the light emitting region 61 on the front side of the Mini LED3 is partially shielded by the first microstructure dots 41 in one-to-one correspondence design, meanwhile, light is guided into a dead zone 62 between the Mini LED3 and the Mini LED3, a plurality of second microstructure dots 42 are also arranged above the dead zone 62, the second microstructure dots 42 are smaller in area and more distributed than the first microstructure dots 41, light guided into the dead zone 62 is further uniformly dispersed, the overall brightness and uniformity of a backlight source can be improved, the light is distributed in a more uniform state after passing through the point-to-point microstructure diffusion film 4, and the more uniform light is dispersed and conducted through the diffusion film 5 again, the LED backlight module has the advantages that light is dispersed more uniformly, the uniformity of the light is further improved, the target brightness and the uniformity are achieved, the light of the target brightness and the uniformity is improved and optimized through the brightness enhancement film 7, and finally the high brightness and the high uniformity are achieved.

Claims

1. The utility model provides an ultra-thin Mini LED backlight with high degree of consistency, a serial communication port, including framework bottom plate (1), framework bottom plate (1) facial make-up is equipped with miniLED base plate (2), miniLED base plate (2) facial make-up is equipped with a plurality of miniLED (3), miniLED (3) are connected with miniLED base plate (2) electricity, point-to-point microstructure diffusion barrier (4) have been installed to miniLED (3) top, be equipped with clearance (6) between miniLED (3) and point-to-point microstructure diffusion barrier (4), point-to-point microstructure diffusion barrier (4) facial make-up is equipped with diffusion barrier (5), diffusion barrier (5) facial make-up is equipped with membrane (7) that adds lustre to, it is equipped with shading double-sided adhesive layer (8) to add lustre to membrane (7) facial make-up.

2. The ultra-thin miniLED backlight source with high uniformity of claim 1, wherein the point-to-point microstructure diffusion film (4) is provided with a plurality of first microstructure dots (41), the area of the first microstructure dots (41) is smaller than that of the miniLED (3), the first microstructure dots (41) have a larger area and face the miniLED (3), the first microstructure dots (41) correspond to the miniLED (3) one by one, and a plurality of second microstructure dots (42) with a smaller area are arranged on two sides of the first microstructure dots (41).

3. The ultra-thin MiniLED backlight with high uniformity of claim 2, wherein the length of the first microstructure dots (41) is greater than the length of the second microstructure dots (42), the height of the first microstructure dots (41) is greater than the height of the second microstructure dots (42), the area of the first microstructure dots (41) is greater than the area of the second microstructure dots (42), and the length of the second microstructure dots (42) is shorter the farther away from the first microstructure dots (41).

4. An ultra-thin MiniLED backlight with high uniformity according to claim 1, wherein the gap (6) comprises a light emitting area (61) of the Mini LED (3), and a blind area (62) is formed at one side of the light emitting area (61).

5. The ultra-thin MiniLED backlight with high uniformity of claim 1, wherein the frame bottom plate (1) is a stainless steel material.