Summary of the invention
The purpose of this invention is to provide the printing opacity face shield that a kind of LED pixel with atomizing treatment effect evenly spreads.
The printing opacity face shield of realizing the even diffusion of LED picture element of the present invention of above-mentioned purpose comprises:
Mask body;
Be positioned at the grid body under the described mask body; And
Be positioned at the circuit board 3 that a plurality of LED light-emitting components are housed under the described grid body its.
Wherein, described mask body is a grey, and evenly distributes by many transverse walls and many a plurality of face shields unit that vertical wall is separated to form on the mask body.
Wherein, the upper surface of described face shield unit is protruding upward in the upper surface of transverse wall and vertical wall, and the lower surface of described face shield unit protrudes from the transverse wall and the vertical lower surface of wall downwards, thereby forming on the mask body with respect to transverse wall and vertical protruding face shield unit under the upper surface epirelief, lower surface of wall.
Wherein said grid body is shallow white Transparent color, and evenly distribution surrounds unit, a plurality of space by a plurality of lateral partitions and a plurality of longitudinal baffle.
Wherein the described face shield of each of mask body unit is a pixel grid of mask body, and wherein each unit, space of grid body is corresponding with corresponding face shield unit.
Wherein, the upper surface of each face shield unit and the LED lamp light-emitting area on the circuit board are at a distance of more than 2/3rds of the pixel grid length of side, and its effect is that the LED pixel on the display screen is evenly distributed in the grid of a pel spacing at the transmitted light behind over-segmentation grid and face shield.
Wherein, described mask body and grid body are fixed together, and make each face shield unit of mask body aim at the unit, corresponding space of grid body respectively.
Wherein, the bottom of described mask body links together by the upper end of ultrasonic soldering mode and grid body.
Wherein, described each the described LED luminophor of circuit board that is installed in places respectively among the unit, a corresponding space, unit, described a plurality of space.
Wherein, the lower end of described grid body is distributed with and is used for a plurality of supporting legs of support grid body.
Wherein, described grid body is by in transparent PC material (polycarbonate) behind Doped with Titanium white powder, the stirring and drying, the injection moulding one-shot forming.
Wherein, the weight part ratio of described transparent PC material and described titanium dioxide is transparent PC material: titanium dioxide=1: 0.001~0.003.
Wherein, described mask body by in transparent PC material, mix diffusion master batch and 5 kinds of toners, stirring and drying after, the injection moulding one-shot forming.
Wherein, described transparent PC material is transparent PC material with the weight part ratio of diffusion master batch: diffusion master batch=1: 0.03~0.04; And the weight part ratio of described transparent PC material and five kinds of toners is respectively:
Transparent PC material: toner=1: 0.0025~0.0035 that is numbered R-TC30
Transparent PC material: toner=1: 0.00075~0.00085 that is numbered R-2001
Transparent PC material: toner=1: 0.00025~0.00035 that is numbered R-4008
Transparent PC material: toner=1: 0.00007~0.00013 that is numbered R-660R
Transparent PC material: toner=1: 0.0029~0.0039 that is numbered R-9103.
The present invention is except in television relay, no matter be under the close shot or the situation of vista shot, all can perfection present outside the LED screen display effect, light decorative effect and video display effect can also be united two into one, under the prerequisite of sacrifice sharpness within reason, the one, the pixel filling rate is brought up to more than 95% by original 59%, and the pixel segmentation line is not obvious, promptly eliminate the filaments of sun between the pixel, the 2nd, the light field uniformity coefficient of each pixel grid iuuminting is more than 75%, through after the optimization of above-mentioned two aspects, the entire display screen curtain can be to present a light-emitting area in monochrome, rather than pixel one by one, eliminated dazzle, can play video image clearly simultaneously.
The present invention is described in detail below in conjunction with accompanying drawing.
Embodiment
Fig. 1 has shown the evenly basic structure of the printing opacity face shield of diffusion of LED picture element of the present invention, and the printing opacity face shield comprises as shown in Figure 1:
Be positioned at mask body 1 topmost, this mask body utmost point is used for the light of transmission LED emission, acts on the ground of stage again;
Be positioned at the grid body 2 under the described mask body 1, this grid body 2 is used for the light of LED emission is imported mask body 1, and the black-tape between each pixel on the face shield that helps to weaken; And
Be positioned at the circuit board 3 that a plurality of LED light-emitting components are housed under the described grid body 3 its, wherein each LED is higher than the substrate of circuit board, so that each LED can enter in the corresponding space 23 of grid body 3.
Fig. 2 and Fig. 3 have shown the structure of mask body 1 of the present invention.As shown in Figure 2, mask body 1 is a grey, and evenly distributes by many transverse walls 11 and many a plurality of face shields unit 13 that vertical wall 12 is separated to form on the mask body 1.Wherein each face shield unit 13 of mask body 1 is a pixel grid of mask body.
As shown in Figure 3, the upper surface of described face shield unit 13 is protruding upward in the upper surface of transverse wall 11 and vertical wall 12, and the lower surface of face shield unit 13 protrudes in the transverse wall 11 and the vertical lower surface of wall 12 downwards, thereby forming on the mask body 1 with respect to transverse wall 11 and vertical protruding face shield unit 13 under the upper surface epirelief, lower surface of wall 12.That is to say that each pixel grid 13 of mask body 1 upper surface is epirelief slightly, make mask body 1 upper surface on the position of transverse wall 11 and vertical wall 12, form shallow grooves; And at the lower surface of mask body 1, because the lower surface of each pixel grid protrudes in transverse wall 11 and vertical wall 12 downwards, therefore at transverse wall 11 with vertically form groove on the position of wall 12, so that connect grid body 2.
The upper surface of each face shield unit 13 and the LED lamp light-emitting area on the circuit board are at a distance of more than 2/3rds of the pixel grid length of side, and its effect is that the LED pixel on the display screen (5 millimeters of luminous point physical sizes are square) is evenly distributed in the grid of a pel spacing at the transmitted light behind over-segmentation grid and face shield.Significantly do not cut apart blanking bar between the pixel, eliminated mosaic phenomenon basically, and the optical field distribution of each pixel grid does not become with watching angle on the face shield.And this face mask structure can stand 600 kilograms/square metre localised load, and the anti-personnel external force such as impact of jumping.The entire display screen curtain has reached unique display effect.
Fig. 4 and Fig. 5 have shown the shape of grid body 2.As shown in Figure 4 and Figure 5, grid body 2 is shallow white Transparent color, and evenly distribution surrounds unit, a plurality of space (that is cavity) 23 by a plurality of lateral partitions 21 and a plurality of longitudinal baffle 22.
The unit, a plurality of space 23 of grid body 2 forms one-to-one relationship with a plurality of face shields unit of mask body 1 13, and each unit, space 23 is corresponding to a corresponding face shield unit or pixel grid 13 in other words.
1 LED pixel of each unit, foursquare space (cutting apart grid) 23 parcel, the low titanium dioxide that mixes of grid, form shallow white transparence, transparent function is to make barrier have good vertical light-conducting type, the barrier wall imports pixel grid 13 edges on the face shield with LED light, with the black-tape between the pixel on the reduction face shield, and play diffusion LED luminous point, can eliminate mosaic phenomenon to greatest extent.Titanium dioxide forms shallowly has a reflex preferably in vain, and it is even to help to be transmitted to the lip-deep optical field distribution of grid, and the effect of the interference of the light between the isolate pixels point, in order to avoid cause ghost image.The face shield of 2mm or the above thickness of 2mm mixes a certain proportion of diffusion master batch, low mixes titanium dioxide and various toner, makes face shield gray when not luminous, and transmittance reached more than 33%, and guarantees that optical field distribution does not become with watching angle.
Mask body 1 is fixed together with grid body 2, makes each face shield unit 13 of mask body 1 aim at the unit, corresponding space 23 of grid body 2 respectively.This connection is preferably finished by ultrasonic soldering, and promptly the bottom of mask body 1 links together by the upper end of ultrasonic soldering mode and grid body 2.
Because the LED light-emitting component is higher than the basic of circuit board, therefore is installed in each described LED luminophor on the circuit board 3 and can be inserted into respectively in the unit 23, a plurality of space among the unit, a corresponding space.
As shown in Figure 5, the lower end of grid body 2 is distributed with and is used for a plurality of supporting legs 24 of support grid body.These supporting legs 24 pass respective through hole contact on the circuit board 3 and are used to the aluminium alloy base plate (not shown) of carrying and dispelling the heat.
Grid body 2 is made of PC material and material titanium dioxide, and it is by in transparent PC material (polycarbonate) behind Doped with Titanium white powder, the stirring and drying, the injection moulding one-shot forming.The weight part ratio of wherein transparent PC material and described titanium dioxide is transparent PC material: titanium dioxide=1: 0.001~0.003.
Mask body 1 is made of PC material, diffusion master batch and five kinds of toners, it by in transparent PC material, mix diffusion master batch and 5 kinds of toners, stirring and drying after, the injection moulding one-shot forming.
Wherein, described transparent PC material with the weight part ratio of diffusion master batch is: transparent PC material: diffusion master batch=1: 0.03~0.04; And
The weight part ratio of described transparent PC material and five kinds of toners is respectively:
Transparent PC material: toner=1: 0.0025~0.0035 that is numbered R-TC30
Transparent PC material: toner=1: 0.00075~0.00085 that is numbered R-2001
Transparent PC material: toner=1: 0.00025~0.00035 that is numbered R-4008
Transparent PC material: toner=1: 0.00007~0.00013 that is numbered R-660R
Transparent PC material: toner=1: 0.0029~0.0039 that is numbered R-9103.
Fig. 6 has shown the exploded view of mask body 1 and grid body 2, for the ease of installing, is positioned at two mask bodies 1 in installation diagram left side on the grid body 2 on figure right side.As shown in the figure, grid body 2 forms unit, a plurality of space 23 by lateral partitions 21 and longitudinal baffle 22.
Fig. 7 has shown two mask bodies 1 shown in Figure 6 has been fixed to situation on the grid body 2.
Below in conjunction with the application example of the present invention, printing opacity face shield of the present invention is elaborated in the 2008 Summer Olympics opening ceremony.
Being intended that of pixel atomizing wanted to break away from the deep impression that traditional LED display stays to people, cooperate creative content to produce brand-new visual effect, especially close shot is taken and also can not made the people remember it being the display effect of LED display.Azulejo pixel atomizing target: when close shot was taken, the border of removing the LED pixel to greatest extent made the soft exquisiteness of display frame, as implicit moistening as the Chinese traditional Chinese painting.
In view of this, at the display characteristic of Opening Ceremony of the Games ground LED screen, be under the situation of 20.83mm at pel spacing (length of side of pixel grid), it is the PC material of 2mm that mask body 1 and grid body 2 have adopted wall thickness.Wherein the PC of mask body 1 material mixes raw materials such as diffusant, toner, titanium dioxide, and effect is a printing opacity, gray; Pixel grid 13 surface distance LED luminous points surfaces 13.8mm, make the luminescent center point to the light field uniformity coefficient greater than 75%, and light field high light, i.e. the optical field distribution of bright dipping does not change with watching angle.The PC material of grid body 2 mixes titanium dioxide in a small amount, each three-primary color LED pixel point has unit, a space 23 (cutting apart barrier), the LED light of barrier offside reflection projects face shield unit or pixel grid 13, further strengthened the uniformity coefficient of each pixel projection light, control the concentration of titanium dioxide simultaneously, make its light that is refracted on the neighbor upper sheathing no longer return, eliminated ghost phenomena.Cutting apart the thick wall of the 2mm of barrier concentrates and absorbs the handing-over line boundary of part light between upper sheathing pixel and pixel that the LED pixel is sent, the filaments of sun on the border of having weakened.Upper sheathing characteristic with face mask structure forms the almost light-emitting area of every cut-off rule, makes whole screen showing that monochrome is as same uniform uniformly light-emitting face, has eliminated mosaic phenomenon.Can show simultaneously the picture clearly that meets displaying video again.Make this screen have real not destroying and take the stage background of relaying effect.
Grid body 2 plays the effect of support simultaneously, has designed supporting leg 24 below the grid body, and supporting leg directly contacts with the aluminum alloy framework (not shown) of LED screen, and fastening with screw.Cut apart between barrier and the upper sheathing and adopt ultrasonic soldering, make it to form the integral body of a face mask structure, have anti-600 kilograms/square metre bearing capacity, and the jump of can anti-personnel performing on screen is impacted.
The shallow grooves that mask body 1 upper surface forms on transverse wall 11 and vertical wall 12 positions can strengthen non-skid property.
The present invention is successful use on the LED screen of the long picture scroll of opening ceremony of Beijing Olympic Games ground, the display frame that its perfect color representation, the uniform light field that links up distribute and be pleasantly surprised, the complete video image with Opening Ceremony of the Games has been presented to whole world spectators, make that the world one of is shake, has stayed fine memory.
Although above the present invention is had been described in detail, the invention is not restricted to this, those skilled in the art of the present technique can carry out various modifications according to principle of the present invention.Therefore, all modifications of doing according to the principle of the invention all should be understood to fall into protection scope of the present invention.