CN204695703U - LED screen is eliminated Moire fringe and is improved the device of activity coefficient - Google Patents
LED screen is eliminated Moire fringe and is improved the device of activity coefficient Download PDFInfo
- Publication number
- CN204695703U CN204695703U CN201520109088.0U CN201520109088U CN204695703U CN 204695703 U CN204695703 U CN 204695703U CN 201520109088 U CN201520109088 U CN 201520109088U CN 204695703 U CN204695703 U CN 204695703U
- Authority
- CN
- China
- Prior art keywords
- led screen
- led
- scattering cover
- screen body
- pixel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Optical Elements Other Than Lenses (AREA)
Abstract
The utility model relates to LED screen and eliminates Moire fringe and the device improving activity coefficient, is made up of scattering cover and LED screen body; Scattering cover covers in the front end of LED screen body, to be fixedly connected with by the fixed pin on scattering cover with LED screen body or directly overleaf gluing be adhered to LED screen surface; Scattering cover size is corresponding with the size of LED screen body; Scattering cover front has several ball roof constructions, the back side be have independent partition-type structures groove or without any structure; LED screen body has several LED pixel lamps, LED pixel lamp is mutually corresponding with ball roof construction; Scattering cover mist degree is not less than 70%.The utility model achieves the elimination of LED screen Moire fringe simultaneously and activity coefficient is increased to more than 93%, and ensure that the independence of pixel, can not interfere with each other between pixel, the acutance of image and sharpness.Ball roof construction makes light scattering even, and when with large angle strabismus screen, brightness decay is not obvious.LED screen body three-primary colours mixes by scattering cover in advance, makes the light in single pixel softer.
Description
Technical field
The utility model relates to a kind of video image display, and particularly a kind of LED screen is eliminated Moire fringe and improved the device of activity coefficient.
Background technology
LED and the LED gap on LED screen surface all have periodic structure.On common LED display screen, amass because LED light-emitting area is less than physical surface shared by pixel, cause between pixel, there is significantly not luminous black area, form latticed periodic structure.Image pickup device due to current photographic equipment is area array CCD mostly, possesses periodic structure equally, so when picture pick-up device photographs LED screen, and when LED screen spatial frequency of imaging on CCD is close with the spatial frequency of CCD, there will be obvious Moire fringe.Moire fringe is not the information of image itself of being taken, therefore needs to eliminate it.
Activity coefficient refers to that in single pixel, light-emitting area accounts for the long-pending ratio of pixel physical surface, as shown in figure 12: be nine pixel cells shown in figure, dotted line lattice is single pixel physical surface, and it is of a size of 3mm × 3mm; Solid line grid is LED encapsulation limit; Circle is LED light-emitting zone, and radius is 0.7mm.The activity coefficient of this LED screen is
less activity coefficient causes when viewing distance is nearer, and picture is discontinuous imperfect, and brightness disproportionation produces granular sensation and comparatively serious dazzling sense.
Existing elimination Moire-fringe deflectometry uses monoblock diffusion glass to be atomized LED integral image, and cannot intercept the interference of light between neighbor, make image blurring, acutance reduces.Improve activity coefficient then mainly arranged by more intensive LED or use the flat board with mist degree to realize.Due to the restriction by LED technique and welding technology, intensive LED arrangement cannot increase substantially activity coefficient; The flat board with mist degree accurately cannot control activity coefficient, and neighbor may be caused overlapping, reduce sharpness, the simultaneously dull and stereotyped angle of divergence is less, is unfavorable for that wide-angle direction is watched.
Utility model content
The utility model relates to a kind of LED screen to be eliminated Moire fringe and improves activity coefficient device, and this kind of device uses the polycarbonate injection moulded with specific penetrability and mist degree to form the scattering cover with independent pixel unit, covers in LED screen body front end.
LED screen is eliminated Moire fringe and is improved the device of activity coefficient, primarily of scattering cover and LED screen body composition; Described scattering cover covers in the front end of LED screen body, and scattering cover is fixedly connected with LED screen body; Described scattering cover size is corresponding with the size of LED screen body;
The front of described scattering cover has several ball roof constructions, the back side of scattering cover can for have partition-type structures independent grooves or without any structure;
Described LED screen body has several LED pixel lamps, described LED pixel lamp is mutually corresponding with described ball roof construction;
Described scattering cover has the mist degree being not less than 70%.
Described ball roof construction comprises multiple spherical structure: positive ball top solid or shell structure, ellipsoid top solid or shell structure, become class ball roof construction or the irregular structure of ball top surface by multiple plain splice.
Described positive ball roof construction is determined according to the mist degree of LED pixel lamp Pixel Dimensions and scattering cover:
The LED pixel lamp pixel length of side is a, then the ball top radius r of ball roof construction is
the centre of sphere of ball roof construction be positioned at the pixel drift angle of LED pixel lamp upper surface to LED pixel lamp centre normal with the position of the isometric distance of radius.
Described ball top radius r is chosen according to the mist degree of the luminous position of LED pixel lamp and luminous scattering angular distribution and scattering cover.
Described partition-type structures is the independent grooves according to the making of LED pixel lamp cycle.
Described groove is rectangular configuration, and its rectangular configuration length and width are dark identical with LED pixel lamp encapsulating structure length, width and height.
Described bottom portion of groove is spherical arc shape concave configuration, and its recessed arc curvature is determined according to selected material mist degree, is maximumly not less than radius r described in claim 3, and the recessed degree of depth is in 0 ~ 0.5mm scope.
The connected mode of described scattering cover and LED screen body is divided into two kinds:
Be fixedly connected with by the fixed pin on scattering cover or be fixedly connected with by being directly adhered to LED screen body surface at the backsizing of scattering cover.
Use LED screen eliminate Moire fringe and improve the method for the device of activity coefficient: to use LED screen as in any one of the preceding claims to eliminate Moire fringe and the device improving activity coefficient eliminates a Moire fringe, comprise the following steps:
1) making of scattering cover: employing has the transparent material being not less than 70% mist degree and makes scattering cover;
2) LED screen body makes;
3) install:
1., adopt fixed pin fixed installation: by step 1) in the scattering cover that completes of injection moulding cover on LED screen body front end, fixed pin is through the through hole on printed circuit board (PCB); The fixed pin that the heating PCB back side is passed makes its melting, and being again shaped after cooling is fixedly mounted in LED screen body by scattering cover;
Or,
2., the bonding installation of gluing is adopted: be directly applied to by glue in the scattering cover back side or partition-type structures, be directly bonded to LED screen body surface.
Ball roof construction on scattering cover and independent partition-type structures can by LED pixel lamp send out uniform in light emission and diffuse to physical area size shared by pixel, activity coefficient reaches more than 93%, make not exist between neighbor gap or gap very little so that cannot interference fringe be formed.
The utility model adopts the scattering cover with independent pixel unit and scattering ball roof construction.The front end face of the independent ball roof construction of scattering cover can uniformly by LED pixel lamp send out three Colored light mixings and scatter to physical surface shared by whole pixel, greatly improve activity coefficient; Simultaneously independently pixel cell cuts off the interference of light between pixel by partition-type structures, has finally both eliminated latticed periodic structure, make again the sharpness of image, acutance without any decline.
The beneficial effects of the utility model are: the utility model, while elimination LED screen Moire fringe, greatly improving activity coefficient, turn eliminating incoherence and the granular sensation of picture when ensure that acutance and the sharpness of image.Ball roof construction makes light scattering even, and when with large angle strabismus screen, brightness decay is not obvious.In simple grain pixel, three primary colors uniform color mixture in scattering cover, has softer viewing effect than separate type three primary colors in traditional LED lamp.The cover of scattering simultaneously suitably reduces the overall brightness of LED screen, reduces its issuable light pollution, prevents the injury that excessive brightness causes spectators' eye.
Accompanying drawing explanation
Fig. 1 is scattering cover front elevation;
Fig. 2 is scattering cover side view;
Fig. 3 is scattering cover Facad structure schematic diagram;
Fig. 4 is scattering cover structure schematic diagram;
Fig. 5 is that scattering cover and LED screen body assemble schematic diagram;
Fig. 6 is partial enlargement structural representation after scattering cover and LED screen body are assembled;
Fig. 7 is ball roof construction schematic diagram;
Fig. 8 is the luminous scattering angular distribution figure of LED;
Fig. 9 is glue sites schematic diagram;
Figure 10 be band fixed pin without groove structure;
Figure 11 be gluing without groove structure;
Figure 12 is activity coefficient schematic diagram.
Wherein, 1-scattering cover; 2-LED shields body; 3-fixed pin; 11-ball roof construction; 12-independence partition-type structures; 21-LED pixel lamp.
Embodiment
Embodiment one:
As shown in figs. 1-7, LED screen is eliminated Moire fringe and is improved the device of activity coefficient, forms primarily of scattering cover 1 and LED screen body 2; Described scattering cover 1 covers in the front end of LED screen body 2, and scattering cover 1 is fixedly connected with LED screen body 2; Described scattering cover size is corresponding with the size of LED screen body 2;
The front of described scattering cover 1 has several ball roof constructions 11, the back side of scattering cover 1 can for have independent partition-type structures groove or without any structure;
Described LED screen body 2 has several LED pixel lamps 21, described LED pixel lamp 21 is mutually corresponding with described ball roof construction 11;
Described scattering cover 1 has the mist degree being not less than 70%.
Described ball roof construction 11 comprises multiple spherical structure: positive ball roof construction, ellipsoid roof construction, become class ball roof construction or the irregular structure of ball top surface by multiple plain splice.
Described positive ball roof construction is determined according to the mist degree of LED pixel lamp 21 Pixel Dimensions and scattering cover 1:
The LED pixel lamp 21 pixel length of side is a, then the ball top radius r of ball roof construction 11 is
the centre of sphere of ball roof construction 11 be positioned at the pixel drift angle of LED pixel lamp 21 upper surface to LED pixel lamp 21 centre normal with the position of the isometric distance of radius.
Described ball top radius r is chosen according to the mist degree of the luminous position of LED pixel lamp 21 and luminous scattering angular distribution and scattering cover 1.
Described independent partition-type structures 12 is the grooves according to the making of LED pixel lamp 21 cycle.
Described groove is rectangular configuration, and its rectangular configuration length and width are dark identical with LED pixel lamp 21 encapsulating structure length, width and height.
Described bottom portion of groove is spherical arc shape concave configuration, and its recessed arc curvature is determined according to selected material mist degree, is maximumly not less than radius r described in claim 3, and the recessed degree of depth is in 0 ~ 0.5mm scope.
Described scattering cover 1 is divided into two kinds with the connected mode of LED screen body 2:
Be fixedly connected with by the fixed pin 3 on scattering cover 1 or be fixedly connected with by being directly adhered to LED screen body 2 surface at the backsizing of scattering cover 1.
Use LED screen eliminate Moire fringe and improve the method for the device of activity coefficient, use LED screen as in any one of the preceding claims to eliminate Moire fringe and the device improving activity coefficient eliminates Moire fringe, comprise the following steps:
1) making of scattering cover: employing has the transparent material being not less than 70% mist degree and makes scattering cover;
2) LED screen body makes;
3) install:
1., adopt fixed pin fixed installation: by step 1) in the scattering cover that completes of injection moulding cover on LED screen body front end, fixed pin is through the through hole on printed circuit board (PCB); The fixed pin that the heating PCB back side is passed makes its melting, and being again shaped after cooling is fixedly mounted in LED screen body by scattering cover;
Or,
2., the bonding installation of gluing is adopted: be directly applied to by glue in the scattering cover back side or partition-type structures, be directly bonded to LED screen body surface.
Shield body for P2.5LED, its pixel period is 2.5mm, and LED screen body package dimension is 2mm × 2mm × 0.7mm, and pcb board thickness is 2mm.LED screen body resolution is 80 × 32, namely one piece of PCB has 80 × 32 LEDs pixel lamps.The luminous scattering angular distribution of LED as shown in Figure 8.
The first step: the making of scattering cover.Adopt polycarbonate (PC) injection moulding to be formed, one piece of scattering cover makes 16 × 16, namely can cover 16 × 16 LEDs pixel lamps.Makrolon material mist degree is 95%, and adding black masterbatch to the penetrability under 1mm thickness is 50%.The scattering cover cycle is 2.5mm; Ball top radial design is 2.06mm; Cut off independent grooves length and width and be 2mm+0.1mm (plus tolerance), the degree of depth is 0.7mm+0.05mm (plus tolerance); Bottom portion of groove according to circumstances can do a spherical arc shape concave configuration, and recessed radius is 3mm in the present embodiment, recessed degree of depth 0.2mm; Fixed pin is (different LED screen body is according to physical size resolution design fixed pin position and quantity) as shown in Figure 4, is the cylinder of Φ 0.7mm-0.05mm (minus tolerance) × 2.3mm.One piece of LED screen body needs 5 × 2 pieces of scattering covers.
Second step: LED screen body makes.Make according to general LED screen method for making.One piece of LED screen body needs installation 5 × 2 pieces of scattering covers, need the through hole opening Φ 0.7mm+0.05mm (plus tolerance) in relevant position respectively.
3rd step: install.Scattering cover injection moulding completed covers on LED screen body front end according to the mode of 5 × 2, and fixed pin is through the through hole on PCB.The fixed pin that passes of the heating PCB back side makes its melting, is again shaped to be fixedly mounted in LED screen body by scattering cover after cooling.
Above, one piece just completes with the LED screen body of scattering cover.Follow-up namely according to general LED giant-screen installation production run by polylith with scattering cover LED unit screen body splice.
Embodiment two:
In the present embodiment, fixed sturcture is not containing fixed pin, by being adhesively fixed at scattering cover backsizing and LED screen body.Glue sites is as shown in Figure 9:
Scattering cover, after whole scattering cover back side plane, is directly covered in LED screen body surface and carries out bonding by gluing.
Other manufacturing process in the present embodiment are with embodiment one.
Embodiment three:
In the present embodiment, the scattering cover back side does not have the independent grooves structure that band cuts off, and is applicable to the case that LED luminous zone is only limitted to LED front surface.Other structure of this embodiment is with embodiment one, and fixed form is with embodiment one or embodiment two.Its structure as shown in Figure 10 and Figure 11.
Embodiment four:
In the present embodiment, the ball roof construction in scattering cover front becomes class ball roof construction by multiple plain splice, and all the other manufacturing process are with embodiment one.
Claims (7)
1.LED screen is eliminated Moire fringe and is improved the device of activity coefficient, it is characterized in that: primarily of scattering cover (1) and LED screen body (2) composition; Described scattering cover (1) covers in the front end of LED screen body (2), and scattering cover (1) is fixedly connected with LED screen body (2); Described scattering cover (1) size is corresponding with the size of LED screen body (2);
The front of described scattering cover (1) has several ball roof constructions (11), the back side of scattering cover (1) be have partition-type structures independent grooves or without any structure;
Described LED screen body (2) has several LED pixel lamps (21), described LED pixel lamp (21) is mutually corresponding with described ball roof construction (11);
Described scattering cover (1) has the mist degree being not less than 70%.
2. LED screen as claimed in claim 1 is eliminated Moire fringe and is improved the device of activity coefficient, it is characterized in that: described ball roof construction (11) comprises multiple spherical structure: positive ball top solid or shell structure, ellipsoid top solid or shell structure, by the irregular structure of multiple plain splice balling-up top surface.
3. LED screen as claimed in claim 2 is eliminated Moire fringe and is improved the device of activity coefficient, it is characterized in that: described positive ball roof construction is determined according to the mist degree of LED pixel lamp (21) Pixel Dimensions and scattering cover (1):
LED pixel lamp (21) the pixel length of side is a, then the ball top radius r of ball roof construction (11) is
the centre of sphere of ball roof construction (11) be positioned at the pixel drift angle of LED pixel lamp (21) upper surface to LED pixel lamp (21) centre normal with the position of the isometric distance of radius.
4. LED screen as claimed in claim 1 is eliminated Moire fringe and is improved the device of activity coefficient, it is characterized in that: partition-type structures (12) is the independent grooves according to the making of LED pixel lamp (21) cycle.
5. LED screen as claimed in claim 4 is eliminated Moire fringe and is improved the device of activity coefficient, it is characterized in that: described groove is rectangular configuration, and its rectangular configuration length and width are dark identical with LED pixel lamp (21) encapsulating structure length, width and height.
6. LED screen as claimed in claim 4 is eliminated Moire fringe and is improved the device of activity coefficient, it is characterized in that: described bottom portion of groove is spherical arc shape concave configuration, its recessed arc curvature is determined according to selected material mist degree, and the recessed degree of depth is in 0 ~ 0.5mm scope.
7. LED screen as claimed in claim 1 is eliminated Moire fringe and is improved the device of activity coefficient, it is characterized in that: described scattering cover (1) is divided into two kinds with the connected mode of LED screen body (2):
Be fixedly connected with by the fixed pin (3) on scattering cover (1) or be fixedly connected with by being directly adhered to LED screen body (2) surface at the backsizing of scattering cover (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520109088.0U CN204695703U (en) | 2015-02-15 | 2015-02-15 | LED screen is eliminated Moire fringe and is improved the device of activity coefficient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520109088.0U CN204695703U (en) | 2015-02-15 | 2015-02-15 | LED screen is eliminated Moire fringe and is improved the device of activity coefficient |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204695703U true CN204695703U (en) | 2015-10-07 |
Family
ID=54235967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520109088.0U Active CN204695703U (en) | 2015-02-15 | 2015-02-15 | LED screen is eliminated Moire fringe and is improved the device of activity coefficient |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204695703U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110349513A (en) * | 2019-07-19 | 2019-10-18 | 北京神州科鹰技术有限公司 | A kind of LED display and production method eliminated moire fringes and improve light mixing effect |
| TWI676845B (en) * | 2018-12-27 | 2019-11-11 | 宏齊科技股份有限公司 | Light board module for LED display |
-
2015
- 2015-02-15 CN CN201520109088.0U patent/CN204695703U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI676845B (en) * | 2018-12-27 | 2019-11-11 | 宏齊科技股份有限公司 | Light board module for LED display |
| CN110349513A (en) * | 2019-07-19 | 2019-10-18 | 北京神州科鹰技术有限公司 | A kind of LED display and production method eliminated moire fringes and improve light mixing effect |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104680947A (en) | Device and method for eliminating moire fringes from LED (light emitting diode) screen and improving filling coefficient | |
| CN201100902Y (en) | LED display module veil and its display module | |
| US8870395B2 (en) | Face shield for LED display screen | |
| TW201435241A (en) | High-definition LED display and ultra small spacing of light spot patch-typed LED composite light | |
| CN204695703U (en) | LED screen is eliminated Moire fringe and is improved the device of activity coefficient | |
| JP6188408B2 (en) | LED display element and video display device | |
| CN209728370U (en) | The glue iron one mount structure and backlight being not readily separated | |
| CN205229510U (en) | Optical lens formula leaded light device of LED screen | |
| CN201804513U (en) | Light emitting diode (LED) display screen mask | |
| CN210489134U (en) | Bidirectional wide-viewing angle display screen | |
| CN207690428U (en) | A kind of LED display to radiate before screen | |
| CN209843139U (en) | Display screen based on COB packaging structure | |
| CN206672555U (en) | A kind of good LED display modules of ornamental and LED display | |
| JP3201378U (en) | Chip-type LED display face mask | |
| CN218069229U (en) | Low-color-cast LED display screen | |
| CN204114717U (en) | A kind of built-in light compensating lamp and use the snapshot one-piece machine of this built-in light compensating lamp | |
| CN204884446U (en) | LED display screen | |
| CN202126810U (en) | Novel outdoor three-in-one light-emitting diode (LED) full color display | |
| CN205104170U (en) | Smooth device of expanding of mole line is eliminated to studio LED display screen | |
| CN208670933U (en) | A kind of LED lamp bead arrangement architecture | |
| JP5995503B2 (en) | Video display device | |
| CN207992656U (en) | Flash lamp and mobile terminal | |
| CN201477813U (en) | 3 in 1 full color module for indoor display screen | |
| CN220382098U (en) | Isotropic LED lamp bead, LED display system and movie screen | |
| CN220400155U (en) | Outdoor energy-saving LED display module and LED display screen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |