CN107799016A - A kind of seamless display method of the additional black and white transflective liquid crystal screen of LED color screens - Google Patents
A kind of seamless display method of the additional black and white transflective liquid crystal screen of LED color screens Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
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Abstract
The invention belongs to TV display field, and in particular to a kind of seamless display method of the additional black and white transflective liquid crystal screen of LED color screens.A kind of seamless display method of the additional black and white transflective liquid crystal screen of LED color screens, it is characterized in that, including LED color screens, outside, LED color screens pass through output image optical information after black and white transflective liquid crystal screen screen cover to black and white transflective liquid crystal screen.Usefulness of the present invention is, pixel image after black and white transflective liquid crystal screen optical filtering processing, though the part luma in color screen pixel cell circular cone section is filtered, but the network black area between color screen pixel is lighted, played comprehensively surface mounted LED display screen wide viewing angle, mixed light be good, luminous intensity distribution is good, color is true to nature, contrast is high, realizes the seamless of LED color screen output images and has no time to show.Experiment finds that the light transmittance of more former patent plastic film declines after optical filtering, but image newly has third dimension, and image is beautiful clear true to nature, is likely to become a kind of HDTV.
Description
Technical field
The invention belongs to TV display field, and in particular to a kind of the seamless of additional black and white transflective liquid crystal screen of LED color screens shows
Show method.
Background technology
The present invention is in my invention's patent --- a kind of-LED in the transparent aperture of plastic film stacking dot matrix Distributed parts is color
Screen screen cover（The patent No. 2016108795913）On the basis of upgrade and develop.The unit pixel of LED color screens is by longitudinally, laterally etc.
Range distribution, this longitudinally, laterally equidistantly distribute make dot matrix be distributed；Equidistant title is pixel period P.Pixel period P
Unit be millimeter, such as P2, P2.5, P3, P4, distribution represent pixel period A=2,2.5,3,4 millimeters.In a pixel period
In, only one, center full color pixel chip.Mutually insulated is needed between full color pixel chip, is insulation around pixel chip
Gap.In the gross area in single pixel cycle, the pixel chip part in only 1/4 region luminous, remaining 3/4 region it is exhausted
Edge gap portion is the interval black area of complete darkness.All black areas of interval in length and breadth form black network in color screen.Due to color screen
The complete image of display, split by black network, therefore the image that color screen is shown is discontinuous, defective.Here it is existing
There is the technological deficiency of color screen, and this technological deficiency is viviparous, can not use and improve the solution of color screen manufacturing process.Former patent is adopted
With the technical scheme of LED color screens+plastic film stacking screen cover；The partially transparent of dot matrix distribution is printed on plastic film stacking screen cover
Aperture, a partially transparent aperture of each pixel face screen cover of LED color screens, it is transparent outside partially transparent aperture；Picture
Nearly lambert's light type law curve is deferred in the luminous of plain unit=comThe luminous regularity of distribution,It is deflection.Deflection
Key node：Deflection is in 30 degree, and luminous intensity is 0.866More than；Deflection is at 40 degree, and luminous intensity is 0.766；
Deflection is at 45 degree, and luminous intensity is 0.707；Each 55 degree in left and right of deflection（110 degree of left and right visibility）, luminous intensity
0.574More than；The center of the light distribution presenting direction angle cosine of single pixel unit is high, and all low unit balls of ring light
Curve.Here, for intuitivism apprehension, " partially transparent aperture " in former patent is newly revised as " part shading circular hole ", its structure
All it is to filter out part to light as implication.Partial analysis：Luminous warp in 30 degree of angles of spot light central area deflection
Luminous intensity declines after part shading circular hole, and 30 degree of angles of close region deflection are to 60 degree of annular regions, i.e. part shading circular hole
Transparent outside surrounding, spot light output intensity is constant；Whole structure：Light intensity after being transmitted in part shading circular hole is justified with part shading
Light intensity approaches after being transmitted outside hole, therefore the general effect for shielding cover is even light action, and change point light source light-emitting is surface source luminescence.Even light is made
Direct effect is to have covered up the black grid line of LED color screens, the LED color screens of covering screen cover, realizes seamless, zero defect
Display.The technical scheme of seamless display method of the present invention, using LED color screens+black and white transflective liquid crystal screen screen cover.Black and white transflective liquid crystal
Screen, can be under the driving of electric field, in any sites exhibited partial shading black hole of screen, instead of being printed on former patent plastic film
The part shading circular hole of system, realize the even light of the shading of light intensity area and Guang Ruo areas printing opacity.The direct effect of even light action is to cover up
The black grid line of LED color screens, seamless, the zero defect for realizing output image are shown.
Black and white transflective liquid crystal screen is covered on LED color screens, and LED color screens pass through black and white transflective liquid crystal screen output image information.
Black and white transflective liquid crystal screen constructs, and the nexine of the i.e. close LED color screens of first layer of black and white transflective liquid crystal screen is polarizer, and the second layer is
Intermediate layer is black-and-white crystal layer, and third layer is that outer layer is polarizer, and the wherein polarization direction of first layer and third layer polarizer is put down
Row is vertical, and intermediate layer liquid crystal layer can operate the polarization direction rotation of transmitted ray under electric field driven, and its effect is in liquid crystal
The regional area of screen forms part shading black hole.In detail, with first layer it is parallel with the polarization direction of third layer polarizer and transmission
Exemplified by the polarization direction deflection angle of light is directly proportional to voltage of electric field, the local pocket of liquid crystal display is selected to be not added with electric field, thoroughly
The polarization direction for penetrating light does not rotate, then the pocket is fully transparent；Such as add adjustable electric in the local pocket of liquid crystal display
Piezoelectric field, increase voltage of starting from scratch, the anglec of rotation of the transmitted ray polarization direction in the region are more than zero and less than 90 degree, then
The region beginning of liquid crystal display is transparent or part shading ----there is the black hole of the continuous reduction of transparency；Such as continue to improve
Voltage, the polarization direction of the transmitted ray of liquid crystal display are rotated close to 90 degree, then the region of liquid crystal display ----part shading black hole
Close to complete shading.Black and white transflective liquid crystal screen can integrally be divided into N rows M and arrange common N*M square, any one square added electric field
Afterwards, part shading black hole can be produced（Square）, it is accurately N*M part shading（It is black）Square.Black and white transflective liquid crystal screen is whole
Body is covered on LED color screens, and LED coloured silk on-screen pixels are dot matrix distributions, corresponds to the part shading square of black and white transflective liquid crystal screen
It is same dot matrix distribution；In the surface of LED color screen pixels, the luminous deflection of respective pixel is 0-, have a pixel big
Small part shading square；The deflection of respective pixel isThe annular region of ----, part shading square periphery is transparent；
The deflection of respective pixel is more than, be outside annular transparent region up and down four parts shading black hole stop light pass through it is defeated
Go out light intensity equal to zero, filter off the spurious rays between pixel.
The content of the invention
According to technical scheme：A kind of seamless display method of the additional black and white transflective liquid crystal screen of LED color screens, its
It is characterized in, including LED color screens, outside, LED color screens pass through output image after black and white transflective liquid crystal screen screen cover to black and white transflective liquid crystal screen
Optical information.
A kind of seamless display method of the described additional black and white transflective liquid crystal screen of LED color screens, it is characterized in that, black and white transmission liquid
Crystalline substance screen is three-layer structure, and first layer is that the nexine of close LED color screens is light polarization plate, and the second layer is that intermediate layer is black-and-white crystal screen
Layer, third layer is that outer layer is light polarization plate, and wherein first layer is parallel with the polarization direction of third layer light polarization plate；Intermediate layer black and white
Liquid crystal display layer is divided into N rows, M row, common N*M square, and the size of square is equal to the pixel period A of LED color screens half, pixel body
Size；The two sides of square is transparency electrode, after the transparency electrode added electric field on two sides, the polarization direction rotation of square transmitted ray
Angle is directly proportional to voltage of electric field；The result of added electric field has three, is not added with electric field, and the polarization direction of square transmitted ray does not rotate,
Square transmitted ray is lossless to penetrate outer layer polarizer, and party's block portion position is transparent region, there is optical information output；After added electric field, electricity
Pressure is more than zero, less than 90 degree more than 0, less than critical voltage, the polarization direction anglec of rotation of square transmitted ray, square transmitted light
Line energy partial penetration outer layer polarizer, party's block portion position is part shading square, there is optical information output；After added electric field, voltage etc.
In critical voltage, the polarization direction of square transmitted ray is rotated by 90 °, and square transmitted ray, should by outer layer polarizer complete shading
Square position complete shading, no optical information output；The shading black hole of plastic cement stacking screen over print brush is different from, on black-and-white crystal screen
The profile of square shading region is square, is further named as part shading square；With LED color screens pixel size and the point of pixel
Battle array distribution is the same, and the part shading square on black-and-white crystal screen is also the dot matrix distribution of same pixel size and pixel, each
The corresponding LED color screen pixel of individual part shading square, part shading square LED color screen pixels area just above, it is each
Individual LED color screens pixel light emission all permeation parts shading squares export；The pixel of part shading square face LED color screens, adjustment portion
Shading square is divided to be to the angle at part shading square both ends to the distance of pixel, pixel center, pixel center to adjacent part
The angle at shading square end is,With two nodes for being pixel orientation angle；Preferably=40 degree, deflection is in 40 degree
Conical region, for pixel light emission in part shading square, the polarizer on square upper strata absorbs part light intensity, the polarization on square upper strata
Output intensity is 0.6 after piece filters；PreferablyBetween=40 degree to=55 degree, i.e., the annular section in 40 to 55 degree, that is, exist
The outer surrounding annular region of part shading square, is not added with electric field, direction of polarized light does not rotate, therefore lossless by not absorbing light intensity, ring
Shape region output intensity is also 0.6；Deflection is more than=55 degree, according to unit ball luminescence law, this part of original pixel hair
Light absorbs light intensity with regard to very little, then by neighbouring polarizer, and output intensity is equal to zero；Circular cone and ring region two parts are photosynthetic simultaneously, and LED is color
The transmitted light intensity for shielding the light intensity after permeation parts shading square with part shading square surrounding is close or identical.
A kind of seamless display method of the described additional black and white transflective liquid crystal screen of LED color screens, it is characterized in that, black and white transmission liquid
Crystalline substance screen is three-layer structure, and first layer is that the nexine of close LED color screens is light polarization plate, and the second layer is that intermediate layer is black-and-white crystal screen
Layer, third layer is that outer layer is light polarization plate, and the wherein polarization direction of first layer and third layer light polarization plate is vertical；Intermediate layer black and white
Liquid crystal display layer is divided into N rows, M row, common N*M square, and the size of square is equal to the pixel period A of LED color screens half, i.e. pixel
Body size；The two sides of square is transparency electrode, after the transparency electrode added electric field on two sides, the polarization direction rotation of square transmitted ray
Gyration is directly proportional to voltage of electric field；The result of added electric field has three, is not added with electric field, and the polarization direction of square transmitted ray is not revolved
Turn, square transmitted ray can not penetrate outer layer polarizer, and party's block portion position is zone of opacity, be exported without optical information；Power-up
After, voltage is less than critical voltage, and the polarization direction anglec of rotation of square transmitted ray is more than zero, less than 90 degree, square transmission
Light energy partial penetration outer layer polarizer, party's block portion position is part shading square, there is optical information output；After added electric field, voltage
Equal to critical voltage, the polarization direction of square transmitted ray is rotated by 90 °, and square outer layer polarizer is fully transparent, party's block portion position
Do not absorb, all-optical information output；It is different from the shading black hole of plastic cement stacking screen over print brush, the square shading region on black-and-white crystal screen
Profile be square, be further named as part shading square；With LED color screens pixel size and the dot matrix of pixel distribution one
Sample, the square shading region on black-and-white crystal screen are also the dot matrix distribution of same pixel size and pixel, each part shading
The corresponding LED color screen pixel of square, shading square in part is in the area just above of LED color screen pixels, each LED color screen picture
The luminous all permeation parts shading squares of element export；The pixel of part shading square face LED color screens, control section shading square arrive
The distance of pixel, pixel center are to the angle at part shading square both ends, pixel center to adjacent part shading square end
Angle be,With two nodes for being pixel orientation angle；Preferably=40 degree, conical region of the deflection in 40 degree,
Pixel light emission is in part shading square, and the polarizer on square upper strata absorbs part light intensity, after the polarizer optical filtering on square upper strata
Output intensity is 0.6；PreferablyBetween=40 degree to=55 degree, i.e., the annular section in 40 to 55 degree, in part shading side
The outer surrounding annular region of block, added electric field, voltage are equal to critical voltage, and direction of polarized light is rotated by 90 °, therefore lossless pass through annulus
Domain, annular region output intensity are also 0.6；Deflection is more than=55 degree, according to unit ball luminescence law, original pixel hair
Light absorbs part light intensity with regard to very little, then by neighbouring polarizer, and output intensity is equal to zero；Two parts are photosynthetic simultaneously, and LED color screens pass through
Light intensity and the transmitted light intensity of part shading square surrounding after part shading square is close or identical.
A kind of seamless display method of the described additional black and white transflective liquid crystal screen of LED color screens, it is characterized in that, black and white transmission liquid
The length of side of the part shading square of crystalline substance screen is equal to corresponding LED color screen pixel body units A/2, and with LED color screens pixel to timing,
The vertical range s of polarizer to Pixel surface selects 0.43A, 0.36A, 0.30A, A/ on the upside of part shading square in corresponding screen cover
When 4, the deflection of corresponding filtered regionIt is 30,35,40,45, wherein A is pixel period.
A kind of seamless display method of the described additional black and white transflective liquid crystal screen of LED color screens, it is characterized in that, black and white transmission liquid
The resolution ratio of crystalline substance screen uses LED color screen pixel unit A/2 or or A/4；Part shading block sizes on black-and-white crystal screen use
Pixel unit A/2.
The present invention a kind of operation principle and plastic film of the seamless display method of the additional black and white transflective liquid crystal screen of LED color screens
It is basically identical to be laminated the operation principle of the LED color screen screen covers in the transparent aperture of dot matrix Distributed parts, is a difference in that light shading method not
Together, the black light shield layer of former patent part shading circular hole is printed in plastic cement interlayer, with black light shield layer extinction；This patent portion
Dividing shading square is realized with light polarization, with outer layer polarizer extinction.Local specification, with a LED color screens pixel cell and right
Cover portion should be shielded to divide exemplified by the cooperation of shading square unit, be described as follows：The a certain pixel cell of LED color screens, the hair of the pixel cell
Luminous point is in the centre of surface of the pixel, the luminous part shading square unit optical filtering by above pixel cell of the pixel cell
Afterwards, optical signal is externally exported.Nearly lambert's light type law curve is deferred in the luminous of pixel cell=comFlat light emission ball point
Cloth rule, see the nearly lambert's light type law curve profile of Fig. 1 pixels, wherein,It is deflection.Deflection lights in 30 degree
Intensity is 0.866More than；Deflection is at 40 degree, and luminous intensity is 0.766；Deflection is at 45 degree, and luminous intensity is 0.707；Deflection is 55 degree of left and right（110 degree of left and right visibility）, luminous intensity is 0.574More than；The light of single pixel unit
The center of strong distribution presenting direction angle cosine is high, all low unit ball curves of ring.And single part shading square list in liquid crystal display
The low frequency optical filtering curve of member is then that both sides are put down（Transparent=1）, it is middle low（It is partially transparent to be less than 1）Optical filtering curve；Square center hides
Luminosity is big, and optical filtering rate is also big, average light output 0.6 after square；Square outer zone, transparent, optical filtering rate=0, light intensity is defeated after optical filtering
Go out to maintain 0.6.It is preferred that the deflection that filtersEqual to 40 degree, the luminous optical filtering knot with part shading circular hole unit of pixel cell
After conjunction, pixel cell it is luminous after the optical filtering of part shading circular hole unit, output intensity becomes a line of collimation, 40 degree
It is inside flat line, lower frequency region filters, average intensity 0.6；Ring region 40-55 is transparent between spending, and frequency domain does not filter, and presentation first rises
After drop close to 0.6Output intensity curve；High-frequency domain beyond 55 degree of deflections lights, natively small or weak, by the portion
The 4 part shading square units of shading circular hole unit up and down are divided to be ended, high-frequency domain cut-off.
Partial analysis：The filter effect of the part shading square unit of black and white transflective liquid crystal screen is nearly lambert's light type rule
Curve is unit ball globe-type luminescence rule, between the conical area of optical filtering deflection 0--40 degree, the luminous component of pixel cell
Angularly gradual change law is filtered（Lower frequency region filters）, the output intensity after optical filtering in the section averagely maintains 0.6；Filtering
The annular section of light direction angle 40--55 degree, i.e., the annular transparent section outside part shading square, pixel cell is in optical filtering direction
The ring region of angle 40--55 degree lights lossless output（Frequency domain is transparent, does not filter）, its output intensity defers to nearly lambert's rule,
0.6Left and right；For 55 degree of deflections between outer annular region, pixel cell is luminous natively weak, then 4 by near-ring shape up and down
Individual part shading circular hole unit absorbs and ended（High-frequency domain ends）.Concrete application details, after adding deflecting electric field, part shading
The effect of square is that the circular cone between low deflection 0-40 degree is lighted to filter a part by cosine rule, and light output maintains 0.6,
See Fig. 3 A areas；Middle direction angular region, i.e., in the 40-55 degree ring regions of both sides, screen cover is fully transparent, and light output also maintains
0.6, see Fig. 3 B areas, color screen angle of visibility is in 55 degree of left and right；55 are outside one's consideration high direction angular region, i.e., 55 degree of both sides are with outer shroud
Shape section, pixel cell in itself it is luminous just it is weak, then by annular section it is outside upper it is lower left and right 4 part shading square units again
After secondary filtering, output intensity is close to zero, it is already possible to ignores, sees Fig. 3 C areas.Pixel light emission divides shading square by screen cover portion
Output intensity after optical filtering, in 0-55 degree tapers section, output intensity is maintained at 0.6.Most important of which is that in 40-
The lossless luminous output in 55 degree of annular sections, the network dark space being filled between pixel are luminous by lambert's " point " before filteringcom, it is changed into " face " uniformly light-emitting 0.6 after filtering, so as to improve the authenticity of color screen output image, it is seamless have no time, continuity
And appreciative value.
The pixel lambert's light type rule deflection cosine values table of table 1
From black and white transflective liquid crystal screen entirety filter action, a kind of seamless display of the additional black and white transflective liquid crystal screen of LED color screens
Method, it is characterized in that, black and white transflective liquid crystal screen integral cap is on LED color screens, the picture of how many dot matrix distribution on LED color screens
Element, the part shading circular hole of upper just corresponding how many dot matrix distribution of screen cover, number of pixels part shading circular hole number and pixel
Number is as many；There are a part shading square unit, LED directly over the normal plane of each pixel cell of LED color screens
After the luminous optical filtering for having to pass through the upper corresponding part shading square unit of screen cover of each pixel cell of color screen,
Can just there is illuminated message output；Nearly lambert's light type law curve is deferred in the luminous of pixel cell=comFlat light emission ball
The regularity of distribution, the low frequency optical filtering of part shading circular hole are selected at 0 degree and arrived in the taper section between 30---45 degree, and part hides
The rule that light circular hole unit presses deflection cosine filters, and pixel cell is luminous through part shading circular hole unit in taper section
Optical filtering after light output be all 0.6.Lower frequency region filters：It is equal to corresponding LED color screen pixels in the diameter of part shading circular hole
Diameter or during the length of side, optical filtering deflection, optional from 0 degree to cone angle 30---45 degree, shading circle in part during corresponding screen covers
Black splotch layer in hole to Pixel surface the optional 0.43A-A/4 of vertical range s, wherein, A is color screen pixel period；Intermediate frequency
Domain is transparent, does not filter, and refers in selected optical filtering deflectionIn annular section between to 55 degree, the luminous of pixel cell can nothing
Damage is by shielding cover, pixel light emission output and 0.6；High-frequency domain, which filters, to be ended, and refers to that high frequency of the deflection higher than 55 degree lights,
By the partially transparent area of near-ring shape that 4 part shading square units form up and down outside annular transparent section；The overall filter of screen cover
Light effect concentrates on 0-55 degree taper sections, and the luminous light output after the optical filtering of black and white transflective liquid crystal screen of color screen is 0.6It is left
It is right；55 are outside one's consideration annular section, the luminous output of no pixel cell.
From black and white transflective liquid crystal screen energy filter action, for any one pixel cell, a kind of described LED color screens
The seamless display method of additional black and white transflective liquid crystal screen, it is characterized in that, the effect of part shading square upper polarizer is to absorb picture
Element is luminous, the effect that low frequency filters be cut it is low pass through light intensity, luminous energy is become heat energy after the absorption of outer layer polarizer and distributed, and luminous energy dissipates
Hair.A part for the pixel cell luminous intensity is filtered, in setting from 0 degree to the direction initialization 30--45 degree
Angle range（Circular cone area）, all keep output 0.6；In the optical filtering deflection of settingOutside to 55 degree of direction angle ranges（It is transparent
Annular regions）, it is lossless by maintaining light intensity defeated that the transparent ring outside part shading circular hole can make the frequency domain of the pixel cell light
Go out 0.6；Outside 55 degree of deflections, the luminous polarizer layer by near-ring shape of high-frequency domain of the pixel cell all absorbs, pixel
It is not present and interferes between unit；0 degree to being preferable optical filtering direction angle range between 30--45 degree, corresponding distance is then
From screen cover in black splotch layer in part shading circular hole to Pixel surface vertical range preferably 0.43 A-A/4, wherein, A
It is pixel period.Summarize：The effect of screen cover is that lower frequency region filters, and frequency domain is lossless by high-frequency domain cut-off, outer layer radiating, disappearing
Deplete energy.
Usefulness of the present invention is the filtered color screen pixel image of black and white transflective liquid crystal screen, though cut color screen picture low
The brightness in plain clear zone, but the network black area of color screen pixel has been lighted, the gap between pixel is eliminated, realizes the seamless aobvious of color screen
Show, ensure display image have no time, continuously, color is soft, adds the depth of field and contrast of image；And in the coloured silk for adding screen cover
Side view around screen within 55 degree, color screen light intensity are basically unchanged.
Brief description of the drawings
Fig. 1 is nearly lambert's light type law curve profile.
Fig. 2 is that a kind of part shading square optical filtering of the seamless display method of the additional black and white transflective liquid crystal screen of LED color screens is bent
Line profile.
Fig. 3 be a kind of seamless display method of the additional black and white transflective liquid crystal screen of LED color screens part shading square unit and
The profile that pixel cell combines.
Fig. 4 is a kind of part shading square point distribution of the seamless display method of the additional black and white transflective liquid crystal screen of LED color screens
Schematic diagram.
In figure：1.LED color screens, 1.1. pixel cells, 1.2. pixel light emissions point, 1.3. networks black area, the transmission of 2. black and white
Liquid crystal display, polarizer on the inside of 2.1., 2.2, part shading square, the outer transparent area of 2.3. parts shading square, 2.4, outer lateral deviation
Shake piece, the 3. part shading square unit length of sides, and 4. pixel tapers light A areas（0---）, 5. pixel annular luminous B areas（
---Ø）, 6. pixel annular optical filtering C areas.
Embodiment
Embodiment is described as follows by taking 320240 black-and-white crystal screens and P2LED color screens as an example：320240 black-and-white crystal screens are selected from
Image display device, peripheral circuit is simple, liquid crystal interface 20, and communicating circuit uses MAX232 standard interfaces, and minimum system is adopted
With STC11F32XE chips, containing keyboard interface and temperature measuring circuit, shading square is using fixed point static matching mode.Operation side
Method, carefully take bonnet apart, dismantle Reflecting backboard and backlight, match size, the locus of black-and-white crystal screen and LED color screens.
The maximum length of side for using LED color screen pixels of the resolution ratio of black-and-white crystal screen.Black-and-white crystal screen high resolution is matched, can be in optical filtering
Circular cone area, shading is set with according to deflection, center is high, and ring region is small, and effect is good.Plus external power supply, shading square is inputted
Parameter, measure square display location and obscurity.LED color screen pixel periods are 2 millimeters, and the length of side of pixel is 1.0 millimeters, as
Interval between element longitudinally, laterally is 1.0 millimeters；The width of liquid crystal display is 320 millimeters, height is 240 millimeters.From P2 color screens
Pixel cell and the profile of part shading square unit of screen cover can be seen that the diameter of part shading square unit and be equal to
The diameter of pixel is 1 millimeter, and the radius of the heat-sink shell of part shading square unit is 0.5 millimeter（A/4）.If part shading
The black splotch layer of square unit to the distance of pixel upper surface be also 0.5 millimeter, then its optical filtering deflection is exactly 45 degree.By
This is visible, and the black splotch layer of part shading square unit is joined to the key that the distance of pixel upper surface is selection optical filtering deflection
Element.The black splotch layer diameter of part shading square unit is identical with the diameter of pixel cell, and preferable optical filtering deflection is 0--
30th, 35,40,45 degree, by taking P2 color screens as an example, the distance of the black splotch layer of corresponding part shading square unit to pixel upper surface
It it is 0.86,0.72,0.599,0.5 millimeter, it is 0.43A, 0.36A, 0.30A, A/4 to be converted into after pixel period.With picture after conversion
The distance that plain cycle A is shown, can be generalized to the calculating of all color screens, with the proviso that the diameter of circular black dot layer, i.e. portion
Divide the diameter of shading square unit, equal to the half A/2 of color screen pixel period, when optical filtering deflection is optional 30,35,40,45 degree,
Luminous cut-off deflection is 54,58,60,61.5 degree, all close to 55 degree.As can be seen here, the optical filtering deflection of the above is selected, it is all full
The requirement of sufficient 55*2=110 degree or so angle of visibility, thus with wide-angle watch color screen when, the brightness of color screen is basically unchanged.Experimental result
Prove, the circuit of 2 methods of power is relatively easy, and the circuit for weighing 3 methods is complicated.
Surface Mount shows that color screen represents the high-end level of LED color screens, and Surface Mount shows that the surface of color screen pixel is plane, lighted
Face is just in Pixel surface.Surface mounted LED display screen advantage is 1, wide viewing angle, there is more than 110 degree wide in the horizontal and vertical directions
Visual angle.2nd, mixed light is good.3rd, luminous intensity distribution is good, and color is true to nature.4th, contrast is high.Surface Mount shows liquid crystal display screen of the color screen along with the present invention
Cover, above advantage is not only kept, and improve the continuity of image, contrast, just as making something perfect even more perfect, meet people to viewing and admiring
The higher and higher requirement of effect.
Usefulness of the present invention is the pixel image after black and white transflective liquid crystal screen optical filtering processing, though filter color screen picture
The part luma in plain unit circular cone section, but the network black area between color screen pixel has been lighted, surface mounted LED display screen has been played comprehensively
Wide viewing angle, mixed light is good, luminous intensity distribution is good, color is true to nature, contrast is high, realizes the seamless of LED color screen output images and has no time to show
Show.Experiment finds that the light transmittance of more former patent plastic film declines after optical filtering, but image newly has third dimension, and image beauty is clearly
It is clear true to nature, it is likely to become a kind of family expenses HDTV.
Claims (5)
1. a kind of seamless display method of the additional black and white transflective liquid crystal screen of LED color screens, it is characterized in that, including LED color screens, black and white is saturating
Penetrate liquid crystal display outside, LED color screens pass through output image optical information after black and white transflective liquid crystal screen screen cover.
2. a kind of seamless display method of the additional black and white transflective liquid crystal screen of LED color screens as claimed in claim 1, it is characterized in that,
Black and white transflective liquid crystal screen is three-layer structure, and first layer is that the nexine of close LED color screens is light polarization plate, and the second layer is that intermediate layer is
Black-and-white crystal screen layer, third layer are that outer layer is light polarization plate, and wherein first layer is parallel with the polarization direction of third layer light polarization plate；
Intermediate layer black-and-white crystal screen layer is divided into N rows, M row, common N*M square, and the size of square is equal to the pixel period A's of LED color screens
Half, pixel body size；The two sides of square is transparency electrode, after the transparency electrode added electric field on two sides, square transmitted ray
The polarization direction anglec of rotation is directly proportional to voltage of electric field；The result of added electric field has three, is not added with electric field, the polarization of square transmitted ray
Direction does not rotate, and square transmitted ray is lossless to penetrate outer layer polarizer, and party's block portion position is transparent region, there is optical information output；
After added electric field, voltage is more than 0, is more than zero, less than 90 less than critical voltage, the polarization direction anglec of rotation of square transmitted ray
Degree, square transmitted ray energy partial penetration outer layer polarizer, party's block portion position is part shading square, there is optical information output；Add
After electric field, voltage is equal to critical voltage, and the polarization direction of square transmitted ray is rotated by 90 °, and square transmitted ray is polarized by outer layer
Piece complete shading, party's block portion position complete shading, no optical information output；The shading black hole of plastic cement stacking screen over print brush is different from,
The profile of square shading region on black-and-white crystal screen is square, is further named as part shading square；With LED color screen pixels
As the dot matrix distribution of size and pixel, the part shading square on black-and-white crystal screen is also same pixel size and pixel
Dot matrix is distributed, the corresponding LED color screen pixel of each part shading square, part shading square in LED color screens pixel just
Upper area, the output of each LED color screen pixel light emission permeation parts shadings square；Part shading square face LED color screens
Pixel, the distance of adjustment member shading square to pixel, pixel center is to the angle at part shading square both ends, pixel
The angle at center to adjacent part shading square end is,With two nodes for being pixel orientation angle；Preferably=40 degree, side
To conical region of the angle in 40 degree, for pixel light emission in part shading square, the polarizer on square upper strata absorbs part light intensity,
Output intensity is 0.6 after the polarizer on square upper strata filters；PreferablyBetween=40 degree to=55 degree, i.e., in 40 to 55 degree
Annular section, i.e., the surrounding annular region outside part shading square, is not added with electric field, and direction of polarized light does not rotate, thus it is lossless by,
Light intensity is not absorbed, annular region output intensity is also 0.6；Deflection is more than=55 degree, according to unit ball luminescence law, sheet
It is luminous with regard to very little to come this part of pixel, then light intensity is absorbed by neighbouring polarizer, output intensity is equal to zero；Circular cone and ring region two
Light splitting merges, and the transmitted light intensity of the light intensity after LED color screen permeation parts shading squares and part shading square surrounding approaches or phase
Together.
3. a kind of seamless display method of the additional black and white transflective liquid crystal screen of LED color screens as claimed in claim 1, it is characterized in that,
Black and white transflective liquid crystal screen is three-layer structure, and first layer is that the nexine of close LED color screens is light polarization plate, and the second layer is that intermediate layer is
Black-and-white crystal screen layer, third layer are that outer layer is light polarization plate, and the wherein polarization direction of first layer and third layer light polarization plate is vertical；
Intermediate layer black-and-white crystal screen layer is divided into N rows, M row, common N*M square, and the size of square is equal to the pixel period A's of LED color screens
Half, i.e. pixel body size；The two sides of square is transparency electrode, after the transparency electrode added electric field on two sides, square transmitted ray
The polarization direction anglec of rotation it is directly proportional to voltage of electric field；The result of added electric field has three, is not added with electric field, square transmitted ray it is inclined
The direction that shakes does not rotate, and square transmitted ray can not penetrate outer layer polarizer, and party's block portion position is zone of opacity, without optical information
Output；After added electric field, voltage is less than critical voltage, and the polarization direction anglec of rotation of square transmitted ray is more than zero, less than 90 degree,
Square transmitted ray energy partial penetration outer layer polarizer, party's block portion position is part shading square, there is optical information output；Added electric field
Afterwards, voltage is equal to critical voltage, and the polarization direction of square transmitted ray is rotated by 90 °, and square outer layer polarizer is fully transparent, should
Square position does not absorb, all-optical information output；It is different from the shading black hole of plastic cement stacking screen over print brush, the side on black-and-white crystal screen
The profile of block shading region is square, is further named as part shading square；With LED color screens pixel size and the dot matrix of pixel
Distribution is the same, and the square shading region on black-and-white crystal screen is also the dot matrix distribution of same pixel size and pixel, each portion
Divide shading square a corresponding LED color screen pixel, shading square in part is in the area just above of LED color screen pixels, each LED
Color screen pixel light emission all permeation parts shading squares export；The pixel of part shading square face LED color screens, control section shading
To the distance of pixel, pixel center is square to the angle at part shading square both ends, pixel center to adjacent part shading side
The angle at block end is,With two nodes for being pixel orientation angle；Preferably=40 degree, tapered zone of the deflection in 40 degree
Domain, pixel light emission is in part shading square, and the polarizer on square upper strata absorbs part light intensity, and the polarizer on square upper strata filters
Output intensity is 0.6 afterwards；PreferablyBetween=40 degree to=55 degree, i.e., the annular section in 40 to 55 degree, in part shading
The outer surrounding annular region of square, added electric field, voltage are equal to critical voltage, and direction of polarized light is rotated by 90 °, therefore lossless pass through annular
Region, annular region output intensity are also 0.6；Deflection is more than=55 degree, according to unit ball luminescence law, original pixel
Luminous to absorb part light intensity with regard to very little, then by neighbouring polarizer, output intensity is equal to zero；Two parts are photosynthetic simultaneously, and LED color screens are saturating
The light intensity crossed after part shading square and the transmitted light intensity of part shading square surrounding are close or identical.
4. a kind of seamless display method of the additional black and white transflective liquid crystal screen of LED color screens as claimed in claim 1, it is characterized in that,
The length of side of the part shading square of black and white transflective liquid crystal screen is equal to corresponding LED color screen pixel body units A/2, and with LED color screen pictures
Element to timing, in corresponding screen cover on the upside of part shading square the vertical range s of polarizer to Pixel surface select 0.43A,
When 0.36A, 0.30A, A/4, the deflection of corresponding filtered regionIt is 30,35,40,45, wherein A is pixel period.
5. a kind of seamless display method of the additional black and white transflective liquid crystal screen of LED color screens as claimed in claim 1, it is characterized in that,
The resolution ratio of black and white transflective liquid crystal screen uses LED color screen pixel unit A/2 or or A/4；Part shading side on black-and-white crystal screen
Block size uses pixel unit A/2.
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