CN100470331C - Plane display device and light gathering type diffusing plate therefor - Google Patents
Plane display device and light gathering type diffusing plate therefor Download PDFInfo
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- CN100470331C CN100470331C CNB2005101341358A CN200510134135A CN100470331C CN 100470331 C CN100470331 C CN 100470331C CN B2005101341358 A CNB2005101341358 A CN B2005101341358A CN 200510134135 A CN200510134135 A CN 200510134135A CN 100470331 C CN100470331 C CN 100470331C
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Abstract
A plain display is disclosed that consists of backlight module, liquid crystal display panel, and spot-light type diffusing board. The liquid crystal display panel is mounted above the backlight module; the spot-light type diffusing board is located between the backlight module and liquid crystal display panel, and the spot-light type diffusing board includes the first diffusing layer and the second diffusing layer, the first diffusing layer closes to the configuration of liquid crystal display panel, and the second diffusing layer closes to the configuration of the first diffusing layer, and the first and second diffusing layer have different refractive index, permeability, and fog value, and that can make the display reach the optimal optical performance.
Description
[technical field]
The invention relates to a kind of flat-panel screens, and particularly have light gathering type diffusing plate therefor (Brightness Enhancement Diffuser Plate, flat-panel screens BEDP) relevant for a kind of.
[background technology]
Along with high-tech development, video product, particularly digitized video signal or device for image become in general daily life common product.In the video signal or device for image of these digital elementizations, display is a significant components, to show relevant information.The user can read information by display, or and then the running of control device.
And the display of being gazed at most at present is the flat-panel screens that cooperates photoelectric technology and semiconductor fabrication to be developed, for example LCD (Liquid Crystal Display, LCD).Because LCD has advantages such as low voltage operating, radiationless line scattering, in light weight and volume are little, and become the major subjects of display research in recent years, the large scale liquid crystal display TV of the present develop actively of industry particularly, more because possess that size is big, image quality is excellent, briliancy is high and advantage such as the visual angle is wide, and become the main flow of large scale flat-surface television.
Fig. 1 is the diagrammatic cross-section of known a kind of LCD.Please refer to Fig. 1, usually LCD is constituted by the backlight module 100 that sends light source and in order to the display panels 110 of display frame, wherein backlight module 100 reflecting plate (not being shown among the figure) that comprises fluorescent tube 102 and cover fluorescent tube 102.In addition; for fear of observing directly the demonstration non-uniform phenomenon (Lamp Mura) that is positioned at fluorescent tube 102 tops; usually can be at backlight module 100 and 110 diffuser plates of configuration of display panels (Diffuser Plate) 120; spread fluorescent tube 102 light sources, and generally can select the lower diffuser plate 120 of higher, the full light penetration rate of mist degree (Haze) (Total Transmittance) for use.Yet such design can cause briliancy to descend again, and (Brightness Enhancement Film, BEF) 140 increase briliancy so need to add an optical brightening membrane again again.In addition, if adopt the higher diffuser plate 120 of penetrance, then need on diffuser plate 120, increase diffusion sheet (Diffuser Sheet) 130 again, to avoid observing directly the shape of fluorescent tube 102.
Always, in LCD, all need to use good which floor blooming piece at present, thereby increase cost, and man-hour is assembled in increase.
[summary of the invention]
Purpose of the present invention is providing a kind of flat-panel screens exactly, and what make has the multilayer diffusion layer and keep optical appearance, reduces the use number of blooming piece, and reduce the cost of blooming piece simultaneously, assemble man-hour to reduce, and can avoid showing uneven phenomenon, to keep the image quality effect.
The present invention proposes a kind of flat-panel screens, comprising: a backlight module; One display panels is disposed at this backlight module top; It is characterized in that: also comprise a light gathering type diffusing plate therefor, between this backlight module and this display panels, and this light gathering type diffusing plate therefor comprises one first diffusion layer and one second diffusion layer, wherein contiguous this display panels configuration of this first diffusion layer, and contiguous this first diffusion layer configuration of this second diffusion layer, and this first diffusion layer has different refractive index (Refractive Index), penetrance (Transmittance) and haze value (Haze Value) with this second diffusion layer.In addition, between first diffusion layer and second diffusion layer in the light gathering type diffusing plate therefor of the present invention, can include an air layer, and the refractive index of first diffusion layer and second diffusion layer is all greater than the refractive index of this air layer.
The present invention proposes a kind of flat-panel screens, comprises backlight module, display panels and light gathering type diffusing plate therefor.Display panels is to be disposed on the backlight module, and light gathering type diffusing plate therefor is then between backlight module and display panels.And, light gathering type diffusing plate therefor comprises first diffusion layer, second diffusion layer, the 3rd diffusion layer and the 4th diffusion layer, the wherein contiguous display panels configuration of first diffusion layer, contiguous first diffusion layer configuration of second diffusion layer, contiguous second diffusion layer configuration of the 3rd diffusion layer, contiguous the 3rd diffusion layer configuration of the 4th diffusion layer, and first and second diffusion layer has different refractive indexes, penetrance and haze value, and the 3rd have different refractive indexes, penetrance and haze value with the 4th diffusion layer.In addition, between first diffusion layer and second diffusion layer in the light gathering type diffusing plate therefor of the present invention, can include an air layer, and the refractive index of first diffusion layer and second diffusion layer is all greater than the refractive index of this air layer, and also can include an air layer between the 3rd diffusion layer and the 4th diffusion layer, and the refractive index of the 3rd diffusion layer and the 4th diffusion layer is all greater than the refractive index of this air layer.
The present invention proposes a kind of light gathering type diffusing plate therefor, comprises one first diffusion layer and one second diffusion layer, contiguous this first diffusion layer configuration of second diffusion layer, and this first diffusion layer has different refractive indexes, penetrance and haze value with this second diffusion layer.
In addition, can include an air layer between first diffusion layer in the light gathering type diffusing plate therefor of the present invention and second diffusion layer, and the refractive index of first diffusion layer and second diffusion layer is all greater than the refractive index of this air layer.
The present invention proposes a kind of light gathering type diffusing plate therefor, comprise first diffusion layer, second diffusion layer, the 3rd diffusion layer and the 4th diffusion layer, wherein contiguous first diffusion layer configuration of second diffusion layer, contiguous second diffusion layer configuration of the 3rd diffusion layer, contiguous the 3rd diffusion layer configuration of the 4th diffusion layer, and first and second diffusion layer has different refractive indexes, penetrance and haze value and the 3rd and has different refractive indexes, penetrance and haze value with the 4th diffusion layer.In addition, between first diffusion layer and second diffusion layer in the light gathering type diffusing plate therefor of the present invention, can include an air layer, and the refractive index of first diffusion layer and second diffusion layer is all greater than the refractive index of this air layer, and also can include an air layer between the 3rd diffusion layer and the 4th diffusion layer, and the refractive index of the 3rd diffusion layer and the 4th diffusion layer is all greater than the refractive index of this air layer.
The light gathering type diffusing plate therefor that the present invention adopts diffusion layer with two-layer at least different optical characteristic to form, mode that so the light source that backlight module sent can be reassociated through diffusion, make flat-panel screens can reach best optical appearance, and do not increase the number of blooming piece and keep optical appearance and image quality effect, also can reduce by this and assemble man-hour.
[description of drawings]
Fig. 1 is the diagrammatic cross-section of known a kind of LCD.
Fig. 2 is the diagrammatic cross-section according to the flat-panel screens of a preferred embodiment of the present invention.
Fig. 3 is the diagrammatic cross-section of the flat-panel screens of another preferred embodiment of the present invention.
Fig. 4 is the section enlarged diagram of the light gathering type diffusing plate therefor 420 in the flat-panel screens of Fig. 3.
Fig. 5 is the section enlarged diagram of the another kind of light gathering type diffusing plate therefor in the flat-panel screens of Fig. 3.
Fig. 6 A be the present invention another have light gathering type diffusing plate therefor that four layers of diffusion layer form with as the plane
The embodiment synoptic diagram of display.
Fig. 6 B is another embodiment of the present invention synoptic diagram.
Fig. 7 is an enforcement view of the present invention.
[embodiment]
Fig. 2 is the diagrammatic cross-section according to the flat-panel screens of a preferred embodiment of the present invention.Please refer to Fig. 2, the flat-panel screens of present embodiment comprises backlight module 200, is disposed at light gathering type diffusing plate therefor (the Brightness Enhancement Diffuser Plate on the backlight module 200, BEDP) 220 and display panels 210, wherein backlight module 200 can be direct type backlight module.And light gathering type diffusing plate therefor 220 is between backlight module 200 and display panels 210, and comprise the first diffusion layer 220a and the second diffusion layer 220b, wherein contiguous display panels 210 configurations of the first diffusion layer 220a, the contiguous first diffusion layer 220a configuration of the second diffusion layer 220b, and the first diffusion layer 220a has different refractive index (RefractiveIndex), penetrance (Transmittance) or haze value (Haze Value) with the second diffusion layer 220b.
In addition, as shown in Figure 2, can include an air layer 221 between the first diffusion layer 220a in the light gathering type diffusing plate therefor 220 of present embodiment and the second diffusion layer 220b, and the refractive index of the first diffusion layer 220a and the second diffusion layer 220b is all greater than the refractive index of this air layer 221; Wherein the refractive index of this air layer 221 is less than 1, and the thickness range of this air layer 221 is advised between 3 ~ 12 millimeters.
In one first embodiment, the refractive index of the first diffusion layer 220a is greater than the refractive index of the second diffusion layer 220b.Its preferably, the ratio of the refractive index of the first diffusion layer 220a and the second diffusion layer 220b is between 1.01 and 1.40; Or the refractive index of the first diffusion layer 220a is between 1.50 and 1.90, for example: cyclic olefin co-polymer (Cyclo OlefinCopolymer, COC), polycarbonate (Polycarbonate, PC), polyetherimide (Ultem) or the like, and the refractive index of the second diffusion layer 220b is between 1.40 and 1.60, for example: acryl (Acrylic), cyclic olefin co-polymer (Cyclo OlefinCopolymer, COC), polycarbonate (Polycarbonate, PC) or the like.
In one second embodiment, the penetrance of the first diffusion layer 220a is less than the penetrance of the second diffusion layer 220b.Its preferably, the ratio of the penetrance of the first diffusion layer 220a and the second diffusion layer 220b is between 0.70 and 1.00; Or the penetrance of the first diffusion layer 220a is between 0.70 and 0.85, and the penetrance of the second diffusion layer 220b is between 0.85 and 0.90.
In one the 3rd embodiment, the haze value of the first diffusion layer 220a is greater than the haze value of the second diffusion layer 220b.Its preferably, the ratio of the haze value of the second diffusion layer 220b and the first diffusion layer 220a is between 0.80 and 1.00; Or the haze value of the first diffusion layer 220a is between 0.90 and 0.96, and the haze value of the second diffusion layer 220b is between 0.86 and 0.90.
In one the 4th embodiment, the refractive index of the first diffusion layer 220a is greater than the refractive index of the second diffusion layer 220b, the penetrance of the first diffusion layer 220a is less than the penetrance of the second diffusion layer 220b, and the haze value of the first diffusion layer 220a is greater than the penetrance of the second diffusion layer 220b.
Can know refractive index, penetrance and the haze value of the first diffusion layer 220a of the present invention and the second diffusion layer 220b by inference by the first embodiment of the present invention, second embodiment, the 3rd embodiment, the 4th embodiment, the demand of all visual product is arranged in pairs or groups arbitrarily.In addition, the size not drawn on scale of each member among the figure, that is indivedual thickness of the gross thickness of light gathering type diffusing plate therefor 220 and the first diffusion layer 220a and the second diffusion layer 220b also can need change according to actual design, and be not limited to shown in the figure.
Moreover, the fluorescent tube 202,302 of backlight module 200 of the present invention, can be cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL), light emitting diode (LightEmitting Diode, LED), outer electrode fluorescent tube (External Electrode FluorescentLamp, EEFL), electroluminescence (Electro-luminescent, EL) or plane lamp plate etc.In addition, the detailed structure of relevant light gathering type diffusing plate therefor 220 of the present invention please refer to Fig. 3.
Moreover, please refer to Fig. 3, the flat-panel screens of present embodiment comprises backlight module 300, is disposed at a display panels 310 and a light gathering type diffusing plate therefor 420 on the backlight module 300, and wherein backlight module 300 can be direct type backlight module.And light gathering type diffusing plate therefor 420 is between backlight module 300 and display panels 310, and light gathering type diffusing plate therefor 420 comprises the chimeric first diffusion layer 420a and the second diffusion layer 420b mutually, wherein contiguous display panels 310 configurations of the first diffusion layer 420a, the contiguous first diffusion layer 420a configuration of the second diffusion layer 420b, and the first diffusion layer 420a has different refractive indexes, penetrance or haze value with the second diffusion layer 420b.
Fig. 4 is the section enlarged diagram of the light gathering type diffusing plate therefor 420 in the flat-panel screens of Fig. 3.Wherein, the first diffusion layer 420a comprises one first depressed part 401a and one first lug boss 402a, the second diffusion layer 420b comprises one second lug boss 401b and one second depressed part 402b, and the first depressed part 401a and the second lug boss 401b are chimeric mutually, the first lug boss 402a and the second depressed part 402b are chimeric mutually, form a chimeric interface 400 between the diffusion layer 420a and the second diffusion layer 420b and make to win, this chimeric interface 400 can be the prism facets shown in drawing (PrismInterface), or simple geometry shape face, wavy surface, the Fu Li leaf-size class is counted curved surface, broken shape curved surface and other irregular face wherein one.
So-called simple geometry shape face person, by this curve can be made of various simple plane or inclined-plane, prism facets as shown in Figure 4 promptly can be considered the simple geometry shape face that is made of simple inclined-plane.So-called wavy surface person is for the curve of its section can be by simple sine or cosine function description person.So-called Fu Li leaf-size class counts curved surface person is for the curve of its section can be counted description person by the Fu Li leaf-size class.So-called broken shape curved surface person for the curve of its section comprises fractional dimension, and has the speciality of oneself's imitation, that is in more and more little yardstick, repeats to make details, and dwindles details with certain fixed form, causes certain round-robin complicated phenomenon person.So-called other irregular person is other curved surface outside the above-mentioned various curved surfaces, can't be represented with mathematical model.
In addition,, more can carry out matt surface and handle (Matte Process), form an auxiliary diffusion layer 403a in the exiting surface of the first diffusion layer 420a, to increase diffusion effect to the first diffusion layer 420a in order more to promote the function of light gathering type diffusing plate therefor of the present invention.Or dispose a nesa coating 403b in order to conductive earthing in the incidence surface place of the second diffusion layer 420b, its material can for indium tin oxide (Indium Tin Oxide, IT0) or other transparent conductive material made.
Therefore, when light 40 when beneath backlight module 200 (as shown in Figure 2) is upwards injected the second diffusion layer 420b and arrive interface 400, can utilize the interface 400 of this prism facets to produce refraction, and make of the normal direction skew of the path of light 40 to light gathering type diffusing plate therefor 420, and reach the effect of optically focused.
In addition, the light gathering type diffusing plate therefor of present embodiment still has other kenel, as shown in Figure 5.Fig. 5 is the section enlarged diagram of the another kind of light gathering type diffusing plate therefor in the flat-panel screens of Fig. 3.Wherein, the first diffusion layer 520a comprises one first flat board 504, one first depressed part 501a and one first lug boss 502a, and the first depressed part 501a and the first lug boss 502a are disposed on first flat board 504, wherein the first lug boss 502a has different penetrances and haze value with first flat board 504, but can select to have close refractive index materials.Moreover, the second diffusion layer 520b comprises one second flat board 506, one second lug boss 501b and one second depressed part 502b, and the second lug boss 501b and the second depressed part 502b are disposed on second flat board 506, wherein the second lug boss 501b has different penetrances and haze value with second flat board 506, but can select to have close refractive index materials.
For instance, in the light gathering type diffusing plate therefor shown in Figure 5 when the refractive index of the first depressed part 501a and the first lug boss 502a is 1.65 polycarbonate, the refractive index of first flat board 504 can be chosen in 1.56～1.70 the scope, for example: polycarbonate, polyetherimide or the like approximately; And when the refractive index of the second lug boss 501b and the second depressed part 502b was 1.49 acryl, the refractive index of second flat board 506 can be chosen in 1.40～1.55 the scope approximately, for example: acryl, cyclic olefin co-polymer or the like.
Please continue with reference to Fig. 5, the first depressed part 501a and the second lug boss 501b are chimeric mutually, the first lug boss 502a and the second depressed part 502b are chimeric mutually, and form a chimeric interface 500 according to this between the first diffusion layer 520a and the second diffusion layer 520b.And the chimeric interface 500 of the first diffusion layer 520a and the second diffusion layer 520b as described in Figure 4, can be the prism facets shown in the drawing, or simple geometry shape face, wavy surface, Fu Li leaf-size class are counted curved surface, broken shape curved surface or other irregular.
In addition,, more can carry out matt surface and handle, form an auxiliary diffusion layer 503a in the exiting surface of the first diffusion layer 520a, to increase diffusion effect to the first diffusion layer 520a in order further to promote the function of light gathering type diffusing plate therefor of the present invention.Or dispose a nesa coating 503b in order to conductive earthing in the incidence surface place of the second diffusion layer 520b.
Therefore, when light 50 when beneath backlight module 200 (as shown in Figure 2) is upwards injected the second diffusion layer 520b and arrive interface 500, can utilize the interface 500 of this prism facets to produce refraction, and make of the normal direction skew of the path of light 50 to light gathering type diffusing plate therefor 520, and reach the effect of optically focused.
To sum up, characteristics of the present invention are to adopt has multilayer different optical characteristic, as: the light gathering type diffusing plate therefor that the diffusion layer of refractive index, penetrance and haze value etc. is formed, mode that so the light source that backlight module sent can be reassociated through diffusion, reach best optical appearance, and do not increase the number of blooming piece and keep optical appearance and image quality effect, also can reduce by this and assemble man-hour.In addition, the present invention more provides another kind of flat-panel screens, its with the flat-panel screens of the 2nd figure as the basis, more include the 3rd diffusion layer and the 4th diffusion layer, wherein, contiguous second diffusion layer configuration of the 3rd diffusion layer, then contiguous the 3rd diffusion layer configuration of the 4th diffusion layer, and the 3rd diffusion layer has different refractive indexes, penetrance and haze value with the 4th diffusion layer.In addition, can include an air layer between the 3rd diffusion layer in the light gathering type diffusing plate therefor and the 4th diffusion layer, and the refractive index of the 3rd diffusion layer and the 4th diffusion layer is all greater than the refractive index of this air layer.The refractive index of air layer is less than 1, and the thickness range of air layer is advised between 3 ~ 12 millimeters.
Based on the above, please refer to Fig. 6 A, the present invention provides one to have light gathering type diffusing plate therefor that four layers of diffusion layer form with the embodiment as flat-panel screens in addition, comprise backlight module 600, be disposed at a display panels 610 and a light gathering type diffusing plate therefor 620 on the backlight module 600, wherein backlight module 600 can be direct type backlight module; Fluorescent tube 602 can be cold cathode fluorescent lamp, light emitting diode, outer electrode fluorescent tube, electroluminescence or plane lamp plate etc.; In the transparency carrier 604, itself and Fig. 5 first dull and stereotyped 504 or second dull and stereotyped 506 is similar, as carrying each lug boss and depressed part usefulness.And light gathering type diffusing plate therefor 620 is between backlight module 600 and display panels 610, and light gathering type diffusing plate therefor 620 comprises the first chimeric diffusion layer 620a mutually, the second diffusion layer 620b, the 3rd diffusion layer 620c and the 4th diffusion layer 620d, wherein contiguous display panels 610 configurations of the first diffusion layer 620a, the contiguous first diffusion layer 620a configuration of the second diffusion layer 620b, contiguous second diffusion layer 620b configuration of the 3rd diffusion layer 620c and contiguous the 3rd diffusion layer 620c configuration of the 4th diffusion layer 620d, and the mutual in twos chimeric surface of these four layers of diffusion layers all has continuous or discrete lug boss and depressed part, make the mutual chimeric and chimeric interface that forms can be prism facets (Prism Interface), or simple geometry shape face, wavy surface, the Fu Li leaf-size class is counted curved surface, broken shape curved surface and other irregular face wherein one.And the first diffusion layer 620a has different refractive indexes, penetrance or haze value and the 3rd diffusion layer 620c and the 4th diffusion 620d layer with the second diffusion layer 620b and has different refractive indexes, penetrance and haze value.
Be the clearer the above embodiments of illustrating, please refer to Fig. 6 A, is that row triangle and del are shaped as example with one, as the mutual in twos chimeric surface of four layers of diffusion layer, this one is that the shape of row continuous triangle shape can be considered a prism facets, promptly by simple geometry shape face that simple inclined-plane constituted.Wherein, the first diffusion layer 620a and the second diffusion layer 620b are mutually chimeric and form a chimeric interface, and the 3rd diffusion layer 620c and the 4th diffusion layer 620d chimeric mutually and form a chimeric interface, its chimeric mechanism is identical as the section enlarged diagram of light gathering type diffusing plate therefor 420 among the 4th figure.
In addition, the light gathering type diffusing plate therefor of present embodiment other kenel of still can giving an example is shown in Fig. 6 B.Backlight module framework shown in Fig. 6 B is identical with Fig. 6 A, its different place is that the first diffusion layer 620a ' is to be the continuous formation of falling the trapezoidal shape of row with one, and the second diffusion layer 620b ' be with one be row discontinuous triangular shaped formation, but it is at regular intervals each other, so that the first diffusion layer 620a ' and the second diffusion layer 620b ' are chimeric each other and form a chimeric interface, its chimeric mechanism still as among the 4th figure section enlarged diagram of light gathering type diffusing plate therefor 420 identical.
In sum, the present invention adopts has four layers of different optical characteristic, as: the light gathering type diffusing plate therefor that the diffusion layer of refractive index, penetrance and haze value etc. is formed.
The penetrance of first diffusion layer is less than or equal to the penetrance of second diffusion layer; The penetrance of second diffusion layer is less than or equal to the penetrance of the 3rd diffusion layer; The penetrance of the 3rd diffusion layer is less than or equal to the penetrance of the 4th diffusion layer.The penetrance of first diffusion layer is between 0.81 and 0.84, and the penetrance of second diffusion layer is between 0.86 and 0.89, and the penetrance of the 3rd diffusion layer is between 0.91 and 0.94, and the penetrance of the 4th diffusion layer is between 0.95 and 0.99.
The haze value of first diffusion layer is more than or equal to the haze value of second diffusion layer; The haze value of second diffusion layer is more than or equal to the haze value of the 3rd diffusion layer; The haze value of the 3rd diffusion layer is more than or equal to the haze value of the 4th diffusion layer, wherein, the haze value of first diffusion layer is between 0.15 and 0.20, the haze value of second diffusion layer is between 0.11 and 0.14, the haze value of the 3rd diffusion layer is between 0.06 and 0.10, and the haze value of the 4th diffusion layer is between 0.01 and 0.05.
The refractive index of the first and the 3rd diffusion layer can be between 1.40 and 1.60, for example: acryl (Acrylic), cyclic olefin co-polymer (Cyclo OlefinCopolymer, COC), polycarbonate (Polycarbonate, PC) or the like; The refractive index of the second and the 4th diffusion layer can be between 1.50 and 1.90, for example: the cyclic olefin co-polymer (CycloOlefinCopolymer, COC), polycarbonate (Polycarbonate, PC), polyetherimide (Ultem) or the like.Compare with the light gathering type diffusing plate therefor of two-layer diffusion layer of the present invention, the refractive index of each layer diffusion layer is closed and is, and is obviously more flexible, the person that no longer is confined to be adjacent to the display panels, and its refractive index needs conditions of higher.
Please refer to the 7th figure, its with three cold cathode fluorescent lamp (CCFL) 702 as example, with the mode of action of explanation present embodiment, it can be avoided seeing because of three tubes, 702 formed strip aberration have the phenomenon that shows inequality in fluorescent tube 702 tops, influence quality of display pictures.
When the light from fluorescent tube 702 passes through transparency carrier 720 and the 4th diffusion layer 730, the shape of cause the 4th diffusion layer 730 continuous triangle shapes can be considered a prism facets, light reflects imaging then for the first time through taking place, and original three tangible strip aberration can be diverged to six aberration; In order, the shape of cause the 3rd diffusion layer 740 continuous triangle shapes can be considered a prism facets, light can take place reflect imaging then for the second time through the 3rd diffusion layer 740 again, makes the image with six strip aberration diverge to 12 aberration after by the 3rd diffusion layer 740.
Then, the shape of cause second diffusion layer 750 continuous triangle shapes can be considered a prism facets, light can take place to reflect imaging then for the third time during again through second diffusion layer 750, makes the image with 12 strip aberration again by diverging to 24 remaining aberration behind second diffusion layer 750; At last, the shape of cause first diffusion layer 760 continuous triangle shapes can be considered a prism facets, light can take place the 4th time during again through first diffusion layer 760 and reflect imaging then, makes 24 remaining strip aberration diverge to uniform spot distribution again, and again can't see any strip aberration.
Therefore, from the light of fluorescent tube 702, through can be considered each diffusion layer of prism facets, light all can make vision imaging more evenly not have aberration through superrefraction, that is by the fluorescent tube top, can see the more uniform vision imaging of demonstration.
The above only is to utilize preferred embodiment to describe technology contents of the present invention in detail, and unrestricted protection scope of the present invention.
[label declaration in the accompanying drawing]
40,50: light
100,200,300,600: backlight module
102,202,302,602,702: fluorescent tube
110,210,310,610: display panels
120: diffuser plate
130: diffusion sheet
140: optical brightening membrane
220,420,520,620: light gathering type diffusing plate therefor
221: air layer
220a, 320a, 420a, 520a, 620a, 620a ', 760: the first diffusion layers
220b, 320b, 420b, 520b, 620b, 620b ', 750: the second diffusion layers
620c, 740: the three diffusion layers
620d, 730: the four diffusion layers
400,500: chimeric interface
401a, 501a: first depressed part
401b, 501b: second lug boss
402a, 502a: first lug boss
402b, 502b: second depressed part
403a, 503a: auxiliary diffusion layer
403b, 503b: nesa coating
504: the first flat boards
506: the second flat boards
720: transparency carrier
Claims (34)
1. flat-panel screens comprises:
One backlight module;
One display panels is disposed at this backlight module top;
One light gathering type diffusing plate therefor, between this backlight module and this display panels, and should
Light gathering type diffusing plate therefor comprises one first diffusion layer and one second diffusion layer; And
One air layer is disposed between this first diffusion layer and this second diffusion layer, and the refractive index of this first diffusion layer and this second diffusion layer is all greater than the refractive index of this air layer; Wherein contiguous this display panels configuration of this first diffusion layer, and contiguous this first diffusion layer configuration of this second diffusion layer, and this first diffusion layer has different refractive indexes, penetrance and haze value with this second diffusion layer.
2. flat-panel screens as claimed in claim 1 is characterized in that: the refractive index of this air layer is less than 1.
3. flat-panel screens as claimed in claim 1 is characterized in that: the thickness range of this air layer is 3 ~ 12 millimeters.
4. flat-panel screens as claimed in claim 1, it is characterized in that: this first diffusion layer more comprises one first flat board, one first depressed part and one first lug boss are disposed on this first flat board, this second diffusion layer more comprises one second flat board, and one second lug boss and one second depressed part are disposed on this second flat board.
5. flat-panel screens as claimed in claim 1 is characterized in that: this light gathering type diffusing plate therefor more comprises an auxiliary diffusion layer, and should auxiliary diffusion layer be contiguous this display panels.
6. flat-panel screens as claimed in claim 1 is characterized in that: this light gathering type diffusing plate therefor more comprises a nesa coating, and nesa coating is contiguous this backlight module.
7. flat-panel screens as claimed in claim 1 is characterized in that: more include:
One the 3rd diffusion layer, contiguous this second diffusion layer configuration; And
One the 4th diffusion layer, contiguous this backlight module, and the 3rd diffusion layer has different refractive indexes, penetrance and haze value with the 4th diffusion layer.
8. flat-panel screens as claimed in claim 7, it is characterized in that: include an air layer between the 3rd diffusion layer in this light gathering type diffusing plate therefor and the 4th diffusion layer, and the refractive index of the 3rd diffusion layer and the 4th diffusion layer is all greater than the refractive index of this air layer.
9. flat-panel screens as claimed in claim 8 is characterized in that: the refractive index of this air layer is less than 1.
10. flat-panel screens as claimed in claim 8 is characterized in that: the thickness range of this air layer is 3 ~ 12 millimeters.
11. flat-panel screens as claimed in claim 7, it is characterized in that: the 3rd diffusion layer more comprises one the 3rd flat board, one the 3rd depressed part and one the 3rd lug boss are disposed on the 3rd flat board, the 4th diffusion layer more comprises Siping City's plate, and one the 4th lug boss and one the 4th depressed part are disposed on this Siping City's plate.
12. flat-panel screens as claimed in claim 1 is characterized in that: the refractive index of this first diffusion layer is greater than the refractive index of this second diffusion layer.
13. flat-panel screens as claimed in claim 1 is characterized in that: the ratio of the refractive index of the refractive index of this first diffusion layer and this second diffusion layer is between 1.01 and 1.40.
14. flat-panel screens as claimed in claim 1 is characterized in that: the penetrance of this first diffusion layer is less than the penetrance of this second diffusion layer.
15. flat-panel screens as claimed in claim 1 is characterized in that: the ratio of the penetrance of the penetrance of this first diffusion layer and this second diffusion layer and is not 1 between 0.70 and 1.
16. flat-panel screens as claimed in claim 1 is characterized in that: the haze value of this first diffusion layer is greater than the haze value of this second diffusion layer.
17. flat-panel screens as claimed in claim 1 is characterized in that: the ratio of the haze value of the haze value of this second diffusion layer and this first diffusion layer and is not 1 between 0.80 and 1.
18. a light gathering type diffusing plate therefor is characterized in that: comprising:
One first diffusion layer;
One second diffusion layer, contiguous this first diffusion layer configuration, and this first diffusion layer has different refractive indexes, penetrance and haze value with this second diffusion layer; And
One air layer is disposed between this first diffusion layer and this second diffusion layer, and the refractive index of this first diffusion layer and this second diffusion layer is all greater than the refractive index of this air layer.
19. light gathering type diffusing plate therefor as claimed in claim 18 is characterized in that: more include:
One the 3rd diffusion layer; And
One the 4th diffusion layer, and the 3rd diffusion layer has different refractive indexes, penetrance and haze value with the 4th diffusion layer;
Wherein the 3rd diffusion layer is positioned between this second diffusion layer and the 4th diffusion layer.
20. flat-panel screens as claimed in claim 19 is characterized in that: the refractive index of this first and the 3rd diffusion layer is between 1.40 and 1.60.
21. flat-panel screens as claimed in claim 19 is characterized in that: the refractive index of this second and the 4th diffusion layer is between 1.50 and 1.90.
22. flat-panel screens as claimed in claim 19 is characterized in that: this first and the 3rd diffusion layer is made of acryl, cyclic olefin co-polymer or polycarbonate.
23. flat-panel screens as claimed in claim 19 is characterized in that: this second and the 4th diffusion layer is made of cyclic olefin co-polymer, polycarbonate or polyetherimide.
24. flat-panel screens as claimed in claim 19, it is characterized in that: the penetrance of this first diffusion layer is between 0.81 and 0.84, the penetrance of this second diffusion layer is between 0.86 and 0.89, the penetrance of the 3rd diffusion layer is between 0.91 and 0.94, and the penetrance of the 4th diffusion layer is between 0.95 and 0.99.
25. flat-panel screens as claimed in claim 19, it is characterized in that: the haze value of this first diffusion layer is between 0.15 and 0.20, the haze value of this second diffusion layer is between 0.11 and 0.14, the haze value of the 3rd diffusion layer is between 0.06 and 0.10, and the haze value of the 4th diffusion layer is between 0.01 and 0.05.
26. light gathering type diffusing plate therefor as claimed in claim 19 is characterized in that: include an air layer between the 3rd diffusion layer and the 4th diffusion layer, and the refractive index of the 3rd diffusion layer and the 4th diffusion layer is all greater than the refractive index of this air layer.
27. flat-panel screens as claimed in claim 18 is characterized in that: the refractive index of this first diffusion layer is between 1.50 and 1.90.
28. flat-panel screens as claimed in claim 18 is characterized in that: the refractive index of this second diffusion layer is between 1.40 and 1.60.
29. flat-panel screens as claimed in claim 18 is characterized in that: this first diffusion layer is made of cyclic olefin co-polymer, polycarbonate or polyetherimide.
30. flat-panel screens as claimed in claim 18 is characterized in that: this second diffusion layer is made of acryl, cyclic olefin co-polymer or polycarbonate.
31. flat-panel screens as claimed in claim 18 is characterized in that: the penetrance of this first diffusion layer is between 0.70 and 0.85.
32. flat-panel screens as claimed in claim 18 is characterized in that: the penetrance of this second diffusion layer is between 0.85 and 0.90.
33. flat-panel screens as claimed in claim 18 is characterized in that: the haze value of this first diffusion layer is between 0.90 and 0.96.
34. flat-panel screens as claimed in claim 18 is characterized in that: the haze value of this second diffusion layer is between 0.86 and 0.90.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101341358A CN100470331C (en) | 2005-12-27 | 2005-12-27 | Plane display device and light gathering type diffusing plate therefor |
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| CNB2005101341358A CN100470331C (en) | 2005-12-27 | 2005-12-27 | Plane display device and light gathering type diffusing plate therefor |
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| Publication Number | Publication Date |
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| CN1991512A CN1991512A (en) | 2007-07-04 |
| CN100470331C true CN100470331C (en) | 2009-03-18 |
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| CNB2005101341358A Active CN100470331C (en) | 2005-12-27 | 2005-12-27 | Plane display device and light gathering type diffusing plate therefor |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100907231B1 (en) * | 2007-07-31 | 2009-07-10 | 신화인터텍 주식회사 | Optical sheet and backlight assembly and liquid crystal display comprising the same |
| CN102207565B (en) * | 2011-07-01 | 2014-07-09 | 凯鑫森(上海)功能性薄膜产业有限公司 | Multifunctional optical sheet, and backlight module and liquid crystal display device with optical sheet |
| WO2013088997A1 (en) * | 2011-12-15 | 2013-06-20 | 東レ株式会社 | Surface light-emitting body and front surface film |
| JP6126802B2 (en) * | 2012-06-15 | 2017-05-10 | リンテック株式会社 | Light diffusion film |
| TWI495175B (en) * | 2012-11-16 | 2015-08-01 | Au Optronics Corp | Organic light electroluminescent device |
| TWI539209B (en) | 2015-04-09 | 2016-06-21 | 友達光電股份有限公司 | Backlight module |
| WO2018155304A1 (en) * | 2017-02-27 | 2018-08-30 | 富士フイルム株式会社 | Luminance equalizing member, backlight unit, and liquid crystal display device |
| CN110391263B (en) * | 2018-04-19 | 2022-06-17 | 群创光电股份有限公司 | Electronic device |
| CN114764201B (en) * | 2021-01-15 | 2023-08-01 | 纳晶科技股份有限公司 | Light conversion device and backlight module comprising same |
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