CN101403834A - Backlight component - Google Patents
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- CN101403834A CN101403834A CNA2008100888277A CN200810088827A CN101403834A CN 101403834 A CN101403834 A CN 101403834A CN A2008100888277 A CNA2008100888277 A CN A2008100888277A CN 200810088827 A CN200810088827 A CN 200810088827A CN 101403834 A CN101403834 A CN 101403834A
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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
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
- G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
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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
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention provides a backlight component capable of improving brightness and reducing manufacturing cost. The backlight component includes a light source producing lights, a light guide board, a reflective film configured on the lower part of the light guide board, and at least one optical film provided at the upper side of the light guide board. The light guide board includes an upper surface formed with mutually connected upper prismatic patterns, an incident face of the incident light from the light source, and a lower surface including mutually isolation formed lower prismatic patterns and flatness sections formed between the lower prismatic patterns, wherein, the distance between the upper surface and the flatness section is segmentally when the distance between the flatness section and the incident face becomes larger, and the lower prismatic patterns include a first inclined plane formed by sloping towards the upper direction from the flatness section at the front end, and a second inclined plane which is formed by sloping towards the lower direction from the first inclined plane and is connected to the flatness section at rear end.
Description
Technical field
The present invention relates to backlight assembly, relate in particular to the backlight assembly that can improve brightness and reduce manufacturing expense.
Background technology
Liquid crystal indicator is a kind of panel display apparatus that utilizes liquid crystal to come display image, compares with other display device such as CRT, PDP to have thinly, light, and the advantage that driving voltage is low and power consumption is less is widely used in the whole industry.
The display panels of the display image in the liquid crystal indicator is non-light-emitting component, and itself is not luminous, therefore the backlight assembly that light is provided to display panels need be set.
Usually, backlight assembly comprises alight, will guide to the light guide plate (Light Guide Plate:LGP) of display panels direction from the light that lamp is supplied with and is configured in reflectance coating below the light guide plate.
But, in order improving, in backlight assembly, to use a plurality of bloomings such as diffusion barrier, prismatic film, diaphragm, thereby increased manufacturing expense from the brightness and the homogeneity of the light of light guide plate ejaculation, the thickness of product is thicker.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of backlight assembly that can improve brightness and reduce manufacturing expense.
Relate to that the backlight assembly of realizing above-mentioned purpose feature of the present invention comprises the light source, the light guide plate that produce light, the reflectance coating of the bottom that is configured in above-mentioned light guide plate and at least one blooming that is configured in the top of above-mentioned light guide plate.Above-mentioned light guide plate comprise be formed with interconnective top prism patterns above, the plane of incidence from the light incident of above-mentioned light source, and below, comprise the bottom prism patterns that mutual isolation forms below above-mentioned, and be formed between this bottom prism patterns and from the above-mentioned plane of incidence far away more and above-mentioned above between the interim par that dwindles of distance, above-mentioned bottom prism patterns comprises first dip plane that direction is formed slopely above above-mentioned, par from front end, and from second dip plane that upper end direction below above-mentioned of this first dip plane is formed slopely and is connected with the par of rear end.
The reflectance coating of the bottom that the backlight assembly that relates to other features of the present invention that realize above-mentioned purpose comprises the light source, the light guide plate that produce light, be configured in above-mentioned light guide plate and at least one blooming that is configured in the top of above-mentioned light guide plate.Above-mentioned light guide plate comprise be formed with interconnective top prism patterns top, from the plane of incidence of the light incident of above-mentioned light source and below, comprise the bottom prism patterns that mutual isolation forms below above-mentioned and be formed between this bottom prism patterns and from the above-mentioned plane of incidence far away more and above-mentioned above between the par that dwindles of distance stage, above-mentioned bottom prism patterns comprises the individual anti-prismatic of n portion.Said n is the natural number more than or equal to 2.
Backlight assembly of the present invention according to above-mentioned can improve brightness, reduces blooming, reduces manufacturing expense.
Description of drawings
Fig. 1 relates to the exploded perspective view of the backlight assembly of one embodiment of the invention;
Fig. 2 is the sectional view with backlight assembly combination shown in Figure 1;
Fig. 3 is the expanded view that specifically illustrates bottom prism patterns shown in Figure 2;
Fig. 4 is the expanded view that another embodiment of bottom prism patterns shown in Figure 2 is shown;
Fig. 5 is the expanded view that another embodiment of bottom prism patterns shown in Figure 2 is shown;
Fig. 6 is the expanded view that another embodiment of bottom prism patterns shown in Figure 2 is shown;
Fig. 7 relates to the expanded view of the bottom prism patterns of another embodiment of the present invention;
Fig. 8 relates to the expanded view of the par of another embodiment of the present invention;
Fig. 9 relates to the vertical view of the bottom prism patterns of another embodiment of the present invention;
Figure 10 relates to the expanded view of the bottom prism patterns of another embodiment of the present invention;
Figure 11 relates to the expanded view of the bottom prism patterns of another embodiment of the present invention;
Figure 12 relates to the expanded view of the bottom prism patterns of another embodiment of the present invention;
Figure 13 relates to the expanded view of the bottom prism patterns of another embodiment of the present invention;
Figure 14 relates to the expanded view of the bottom prism patterns of another embodiment of the present invention;
Figure 15 relates to the expanded view of the bottom prism patterns of another embodiment of the present invention;
Figure 16 relates to the expanded view of the bottom prism patterns of another embodiment of the present invention;
Figure 17 is the part expanded view of light guide plate shown in Figure 1;
Figure 18 relates to the exploded perspective view of the backlight assembly of another embodiment of the present invention;
Figure 19 relates to the exploded perspective view of the backlight assembly of another embodiment of the present invention; And
Figure 20 relates to the exploded perspective view of the liquid crystal indicator of one embodiment of the invention.
Reference numeral
100 backlight assemblies, 110 light sources
112 lampshades, 120 reflectance coatings
130 bloomings, 131 diffusion barriers
132 prismatic film, 133 prismatic patterns
134 diaphragms, 200 light guide plate
212 pairs of light faces of 210 planes of incidence
Above 220 following 230
250,350,450,510,520,550,800 bottom prism patterns
252,352,452,512,552,812, first dip plane
254,354,454,514,554,814 second dip plane
256,356,458,558,816 the 3rd dip plane
260,262 pars, 270 top prism patterns
456,556 joint faces, 600 liquid crystal indicators
700 display units, 710 display panels
712 first substrates, 714 second substrates
720 driving circuit portions, 721 source electrode print circuit substrates
723 data drive circuit films, 725 gate driver circuit films
810 anti-prismatic portions, 818 auxiliary pars
Embodiment
Below, describe the preferred embodiment that is used to implement backlight assembly of the present invention in detail with reference to accompanying drawing.
Fig. 1 is the exploded perspective view that the backlight assembly that relates to one embodiment of the invention is shown, and Fig. 2 is the sectional view with backlight assembly combination shown in Figure 1.
With reference to Fig. 1 and Fig. 2, the backlight assembly 100 that relates to one embodiment of the invention comprise luminous light source 110, guiding from the light guide plate 200 in the path of the light of light source 110 emissions, be configured in the reflectance coating 120 below the light guide plate 200 and be configured at least one blooming 130 above the light guide plate 200.
Following 220 of light guide plate 200 comprises bottom prism patterns 250 and par 260.
Thereby the light that incides light guide plate 200 inside by the plane of incidence 210 all reflects by par 260, changes reflection angle by bottom prism patterns 250, penetrates to the direction vertical with top 230 directions.
Thereby 220 bottom prism patterns 250 gathers on the vertical direction below the light of light source 110 by the plane of incidence 210 incidents is formed on, and gathers on the horizontal direction by being formed on top 230 top prism patterns 270.
Blooming 130 is configured in top 230 sides of light guide plate 200 so that or the brightness that improves the light that penetrates from light guide plate 200, or improve presentation quality.
In this embodiment, blooming 130 comprises a diffusion barrier 131.Therefore diffusion barrier 131 has mist degree (haze) to a certain degree, can improve appearance qualities such as bright line that bottom prism patterns 250 and top prism patterns 270 by light guide plate 200 may cause, concealed wire, the dark portion in angle.For example, diffusion barrier 131 has about 50%～70% mist degree.Diffusion barrier 131 for example can form with the UTE film of 3M society.
As above-mentioned, only use a diffusion barrier 131, thereby remove 2 prismatic film and the diaphragm that uses in the existing backlight assembly, manufacturing cost be can reduce, and thickness and weight reduced.
Fig. 3 is the expanded view that specifically illustrates bottom prism patterns shown in Figure 2.
With reference to Fig. 2 and Fig. 3, following 220 the bottom prism patterns 250 that is formed on light guide plate 200 has triangular shaped groove with the cross section basically and forms, so that the light in the light guide plate 200 are vertically penetrated.
The 3rd dip plane 256 extends in parallel from second dip plane 254 and first dip plane 252, is connected with the par 260 of rear end.
In fact first dip plane 252 and second dip plane 254 are the symmetrical formation of benchmark with the normal N L of par 260.
Be equivalent to bottom prism patterns 250 front-end and back-end difference in thickness the 3rd dip plane 256 first the height h1, can try to achieve according to numerical expression 1.
[numerical expression 1] h1=(d1-d2)/m, here, d1 is first thickness of the plane of incidence 210, and d2 is second thickness to light face 212, and m is following 220 ladder (step) number.
That is, first of the 3rd dip plane 256 height h1 is according to the plane of incidence 210 with to the difference in thickness of light face 212 and following 220 ladder number decision.
On the other hand, second height h2, the base a of the 3rd dip plane 256 and the base b of second dip plane 254 etc. of first dip plane 252 are the most suitableization, do not launch from the side and lose so that can not occur in the light that is directed in the light guide plate 200.
It is the height that the light that advances below the critical angle (α) of benchmark can not arrive the 3rd dip plane 256 that first dip plane 252 preferably has at the normal with the plane of incidence 210.Thereby the second height h2 of first dip plane 252 can try to achieve according to numerical expression 2.
[numerical expression 2] h2=h1 * [1+tan (α) tan (β/2)/[1-tan (α) tan (β/2] at this, α is the critical angle of light guide plate 200, β is the interior angle that is made of first dip plane 252 and second dip plane 254.
And the base of the 3rd dip plane 256 (a) can try to achieve according to numerical expression 3.
[numerical expression 3] a=h1 * tan (β/2)
And the base of second dip plane 254 (b) can try to achieve according to numerical expression 4.
[numerical expression 4] b=h2 * tan (β/2)
On the other hand, the interior angle (β) that is made of first dip plane 252 and second dip plane 254 can be about 60 °～about 90 ° scope, so that the light that will be directed in light guide plate 200 inside is launched to vertical direction.Preferably the interior angle (β) that is made of first dip plane 252 and second dip plane 254 forms about 78 °.
Use maximum PMMA light guide plate to have about 42.16 ° critical angle (α) as light guide plate 200.For example, the plane of incidence 210 of PMMA light guide plate is about 213mm to the length to light face 212, when the spacing between the bottom prism patterns 250 is about 300 μ m, below 220 ladder number be 710.At this moment, first thickness d 2 of the plane of incidence 210 of PMMA light guide plate is about 2.6mm, and when second thickness d 2 of light face 212 was about 0.7mm, difference in thickness was about 1.9mm.Thereby, be about 2.68 μ m according to the first height h1 of numerical expression 1, the three dip plane 256.And, the interior angle (β) that is made of first dip plane 252 and second dip plane 254 forms about 78 °, then according to numerical expression 2, the second height h2 of first dip plane 252 is about 17.38 μ m, according to numerical expression 3, the base of the 3rd dip plane 256 (a) is about 2.17 μ m, is about 14.07 μ m according to the base (b) of numerical expression 4, the second dip plane 254.
Fig. 4 is the expanded view that another embodiment of bottom prism patterns shown in Figure 2 is shown.
With reference to Fig. 2 and Fig. 4, bottom prism patterns 350 comprises from the par 260 of front end towards first dip plane 352 that top 230 directions are formed slopely, from first dip plane 352 towards second dip plane 354 that following 220 directions are formed slopely and the 3rd dip plane 356 that extends in parallel and be connected with first dip plane 352 from second dip plane 354 with the par 260 of rear end.
The emission angle of the light of top 230 emissions by light guide plate 200 distributes and to be subjected to the influence of the interior angle that first dip plane 352 and second dip plane 354 constitute.At this moment, the base (b) of the base of first dip plane 352 (c) and second dip plane 354 is of different sizes, and therefore the interior angle (γ 2) of the normal BL formation of the interior angle (γ 1) of the normal N L of first dip plane 352 and par 260 formation and second dip plane 354 and par 260 is different.
In order to improve the distribution of Vertical Launch light, the interior angle (γ 1) that the normal N L of first dip plane 352 and par 260 constitutes can be in about 34 °～about 44 ° scope.The interior angle (γ 1) that the normal N L of preferred first dip plane 352 and par 260 constitutes is about 39 °.
Fig. 5 is the expanded view that another embodiment of bottom prism patterns shown in Figure 2 is shown.
With reference to Fig. 2 and Fig. 5, bottom prism patterns 450 comprises from the par 260 of front end towards first dip plane 452 that top 230 directions are formed slopely, from first dip plane 452 towards second dip plane 454 that following 220 directions are formed slopely, the joint face 456 that extends in parallel from second dip plane 454 and par 260 and the 3rd dip plane 458 that extends in parallel and be connected with first dip plane 452 from joint face 456 with the par 260 of rear end.Joint face 456 is formed between second dip plane 454 and the 3rd dip plane 458, when the prism patterns 450 of ejection formation bottom, improves the transfer printing performance.
Fig. 6 is the expanded view that another embodiment of bottom prism patterns shown in Figure 2 is shown.
With reference to Fig. 2 and Fig. 6, bottom prism patterns 550 can comprise from the par 260 of front end towards first dip plane 552 that top 230 directions are formed slopely, from first dip plane 552 towards second dip plane 554 that following 220 directions are formed slopely, the joint face 556 that extends in parallel from second dip plane 554 and par 260 and the 3rd dip plane 558 that extends in parallel and be connected with first dip plane 552 from joint face 556 with the par 260 of rear end.
Fig. 7 is the expanded view that the bottom prism patterns that relates to another embodiment of the present invention is shown.
With reference to Fig. 2 and Fig. 7, below light guide plate 200, be formed with the bottom prism patterns 510 of mutual isolation on 220 and be formed on par 260 between the bottom prism patterns 510.Far away more with the distance of the plane of incidence 210, the distance between the par 260 and top 230 is dwindled interimly, with the plane of incidence 210 vertical formation, promptly with top 230 parallel formation.
On the other hand, the size of bottom prism patterns 510 that is equivalent to the height of first dip plane 512 can form about 2 μ m～about 50 μ m.The size of bottom prism patterns 510 can change according to the position.For example, the size of bottom prism patterns 510 can change so that from the plane of incidence 210 to the relation that light face 212 is become the high-order moment function.When 1 time became than high order, the number of times of variable function was high more with respect to the variable function of bottom prism patterns 510 sizes, and the brightness of central portion is high more, the plane of incidence 210 and lower near the brightness the light face 212.Preferably, set the variable function of the size of relative bottom prism patterns 510, so that Luminance Distribution is represented Gaussian distribution (Gaussian profile).Bottom prism patterns 510 can form the interval with about 100 μ m～about 300 μ m degree.
As above-mentioned, the shape of bottom prism patterns 510 formed only comprise first dip plane 512 and second dip plane 514, thus the shape processing of the bottom prism patterns 510 can improve Fig. 3 and form the time and penetrate the transfer printing performance to the 3rd dip plane shown in Figure 6.
Fig. 8 is the expanded view that the par of another embodiment of the present invention is shown.
With reference to Fig. 2 and Fig. 8, be formed on each par 262 between the bottom prism patterns 510 form from the plane of incidence 210 far away more, top 230 being benchmark, downward direction inclination certain angle (θ).For example, par 262 forms about 0.1 °～0.3 °.
As above-mentioned, par 262 direction down is formed slopely, and then the incident angle that incides the light of par 262 from the plane of incidence 210 directions becomes big, and reflection angle is same thus becomes big, improves the entire emission rate.And after the reflection once, the light reach is elongated, and order of reflection reduces, and Sun Shi light is minimum thus, has increased the effective light by top 230 emissions, and improves brightness.
Fig. 9 is the vertical view that the bottom prism patterns that relates to another embodiment of the present invention is shown.
With reference to Fig. 9, bottom prism patterns 520 can form irregular tracing pattern.As above-mentioned, bottom prism patterns 520 is formed irregular tracing pattern, then can prevent the bad of owing to be configured in the interference of display panel on light guide plate 200 tops contingent ripple presentation qualities such as (moire).On the other hand, bottom prism patterns 520 can form the oblique line form of irregular spacing, to prevent to produce ripple.
Figure 10 to Figure 16 is the expanded view that the bottom prism patterns that relates to another embodiment of the present invention is shown.
With reference to Figure 10 to Figure 16, bottom prism patterns 800 comprises the anti-prismatic of n portion 810.Here, n is the natural number more than or equal to 2.That is, bottom prism patterns 800 comprises the anti-prismatic portion 810 more than 2 at least.
With reference to Figure 11, bottom prism patterns 800 can also comprise the 3rd dip plane 816.The 3rd dip plane 816 from a plurality of anti-prismatic portion 810 last, promptly the lower end of second dip plane 814 of n anti-prismatic portion 810 is formed slopely towards the top direction, and be connected with the par 260 of rear end.
With reference to Figure 12, bottom prism patterns 800 can also comprise auxiliary par 818.Auxiliary par 818 is formed on the plane parallel with par 260, promptly on the plane parallel with top 230.Auxiliary par 818 is formed between n anti-prismatic portion 810 and the 3rd dip plane 816.
With reference to Figure 13, Figure 14, Figure 15, auxiliary par 818 can be formed between the anti-prismatic portion 810.
Particularly, as shown in figure 13, auxiliary par 818 can be formed between the anti-prismatic of a plurality of anti-prismatic portions 810 and last n the portion 810.And as shown in figure 14, auxiliary par 818 can also be formed between first anti-prismatic portion 810 and the remaining a plurality of anti-prismatic portion 810.And as shown in figure 15, auxiliary par 818 can be formed between a plurality of anti-prismatic portions 810 and a plurality of anti-prismatic portion 810.
With reference to Figure 16, bottom prism patterns 800 can comprise the auxiliary par 818 more than 2.For example, auxiliary par 818 can be respectively formed between the anti-prismatic portion 810 and n anti-prismatic portion 810 and the 3rd dip plane 816 between.
On the other hand, in Figure 10 to Figure 16, par 260 is vertical with the plane of incidence to be formed, that is, and and with top 230 parallel formation.Different therewith, par 260 can form from the plane of incidence far away more, top 230 to be benchmark, and the direction about 0.1 °～about 0.3 ° of degree that tilts down.And bottom prism patterns 800 forms the shape of stripes with the parallel formation of the plane of incidence.Different therewith, bottom prism patterns 800 can form irregular tracing pattern.
As above-mentioned, in a bottom prism patterns 800, form the anti-prismatic portion 810 more than 2, thereby the light of reducing the loss is concentrated the distribution of emission angle, thereby can be improved front face brightness.
Figure 17 is the part expanded view that enlarges light guide plate shown in Figure 1.
With reference to Figure 17, on light guide plate 200, be formed with interconnective a plurality of tops prism patterns 270 on 230.Top prism patterns 270 forms across top 230 whole surface.
The cross section vertical with length direction of top prism patterns 270 has triangular shaped in fact.The drift angle of top prism patterns 270 (θ) can be formed in the about 80 °～about 150 ° scope.Preferably, the drift angle of top prism patterns 270 (θ) forms about 110 °.Interval between the top prism patterns 270 (P) can be formed in the scope of about 50 μ m～about 150 μ m.
On the other hand, the angle part that the upper end of top prism patterns 270, promptly, 2 dip plane connect can have crooked shape.And top prism patterns 270 can have curve form.
Figure 18 is the exploded perspective view that the backlight assembly that relates to another embodiment of the present invention is shown.In Figure 18, except other structures of blooming are identical with structure shown in Figure 1, indicate identical reference marks for structural elements, omit explanation.
With reference to Figure 18, blooming comprises 1 prismatic film 132.On prismatic film 132, be formed with interconnective prismatic pattern 133.Prismatic pattern 133 have be formed on be formed at light guide plate 200 top 230 on the parallel direction of top prism patterns 270 on shape of stripes.Different therewith, prismatic pattern 133 can also have be formed on top prism patterns 270 rectangular directions on shape of stripes.For example, prismatic film 132 can form with the BEF3 of 3M society.
The cross section vertical with length direction of prismatic pattern 133 can have triangular shaped in fact.The drift angle of prismatic pattern 133 can be formed in about 80 °～about 150 ° of scopes.On the other hand, the angle part that the upper end of prismatic pattern 133, promptly, 2 dip plane connect can have crooked shape.And prismatic pattern 133 can have curve form.
As above-mentioned, only with 1 prismatic film 132 as blooming, thereby improve appearance qualities such as bright line, concealed wire, the dark portion in angle, compare when only using diffusion barrier simultaneously, can significantly improve brightness.
Figure 19 relates to the exploded perspective view of the backlight assembly of another embodiment of the present invention.In Figure 19, except other structures of diaphragm are identical with structure shown in Figure 180, therefore, structural elements is indicated identical symbol, omit explanation.
With reference to Figure 19, blooming comprises a prismatic film 132 and a diaphragm 134.Diaphragm 134 is configured in the top of prismatic film 132 and protects prismatic film 132, prevents and be configured in the cohesive between the display panels on top simultaneously, thereby can improve the reliability of presentation quality.Diaphragm 134 has for example about 70%～90% mist degree.
Table 1 is the data of light feature of measuring the liquid crystal indicator of optic film structure.In table 1; comparative example do not form first and the top of the light guide plate of top prism patterns used diffusion barrier, 2 prismatic film and diaphragm; first embodiment is as shown in Figure 1; form first and the top of the light guide plate of top prism patterns used 1 diffusion barrier; second embodiment is as shown in figure 18; be formed with first and the top of the light guide plate of top prism patterns used 1 prismatic film; the 3rd embodiment is as shown in figure 19, be formed with first and the top of the light guide plate of top prism patterns used prismatic film and diaphragm.
Table 1
| Comparative example | First embodiment | Second embodiment | The 3rd embodiment | |
| 5 mean flow rates (nit) | 176 | 166 | 216 | 215 |
| Brighteness ratio (%) | 100.0 | 94.2 | 123.1 | 122.2 |
| 5 brightness uniformity coefficient (%) | 92.2 | 93.2 | 86.8 | 86.9 |
With reference to table 1, in only using first embodiment of 1 diffusion barrier, to compare with the comparative example that uses 4 bloomings, mean flow rate descends to some extent, still, can reduce by 3 bloomings, therefore can obtain to reduce manufacturing cost, reduces the effect of thickness and weight.
Or only use 1 prismatic film, perhaps use among the second and the 3rd embodiment of 1 prismatic film and 1 diaphragm, compare with first embodiment with comparative example; luminance uniformity descends to some extent; but it is about 23% that the brightness ratio comparative example improves, and improved about 30% degree than first embodiment.Thereby according to second embodiment and the 3rd embodiment, can improve mean flow rate, reduce blooming, and reduce thickness, weight and cost of products than comparative example.
Figure 20 is the exploded perspective view that the liquid crystal indicator that relates to one embodiment of the invention is shown.
With reference to Figure 20, liquid crystal indicator 600 comprises the backlight assembly 100 of supplying with light and utilizes the display unit 700 that comes display image from the light of backlight assembly 100 supplies.
Display unit 700 comprises the driving circuit portion 720 that light that utilization is supplied with from backlight assembly 100 comes the display panels 710 of display image and is used to drive display panels 710.
Display panels 710 is configured in the top of blooming 130.Display panels 710 comprise first substrate 712, with first substrate, 712 opposed second substrates 714 that combine and be arranged on first substrate 712 and second substrate 714 between liquid crystal layer (not shown).
First substrate 712 can be the TFT substrate that the thin film transistor (TFT) (below be called TFT) as on-off element forms the matrix form.Be connected with data line and gate line on the source terminal of TFT and the gate terminal respectively, on drain terminal, be connected with the pixel electrode that forms with transparent conductive material.
Second substrate 714 can be the colour filtering chip basic board that the rgb pixel that is used to embody color forms film morphology.On second substrate 714, form the common electrode that forms with transparent conductive material.On the other hand, color filter can be formed on first substrate 712.
Display panels 710 with said structure is applied on the gate terminal of TFT and when connecting TFT, forms electric field between pixel electrode and common electrode at power supply.By such electric field, the arrangement that is arranged on the liquid crystal molecule of the liquid crystal layer between first substrate 712 and second substrate 714 changes, by the change of Liquid Crystal Molecules Alignment, the angle that sees through of the light of supplying with from backlight assembly 100 changes, and shows and wishes image gray.
Driving circuit portion 720 can comprise that output is used to drive the source electrode print circuit substrate 721 of the various control signals of display panels 710, connects source electrode print circuit substrate 721 and the data drive circuit film 723 of display panels 710 and the gate driver circuit film 725 that is connected with display panels 710.
Data drive circuit film 723 is connected with the data line of first substrate 712, and gate driver circuit film 725 is connected with the gate line of first substrate 712.Data drive circuit film 723 and gate driver circuit film 725 can comprise chip for driving, and the control signal that its response is supplied with from source electrode print circuit substrate 721 is exported the drive signal that is used to drive display panels 710.Data drive circuit film 723 and gate driver circuit film 725 for example carry encapsulation (TCP) by band or membrane of flip chip encapsulation (COP) constitutes.
Though not shown, driving circuit portion 720 can also comprise the grid print circuit substrate that is connected with gate driver circuit film 725.
According to above-mentioned backlight assembly, below and above be formed with the light guide plate of prism patterns top only dispose 1 diffusion barrier, thereby need not to reduce the performance of product, can reduce the cost of product, reduce thickness and weight.And, below and above be formed with prism patterns light guide plate top or only use 1 prismatic film or use 1 prismatic film and 1 diaphragm, thereby can increase brightness, reduce blooming, reduce thickness, weight and cost of products thus.
More than, describe the present invention in detail according to embodiment, still, the present invention is not limited thereto, field under the present invention, those skilled in the art can make amendment or change under the situation that does not break away from thought of the present invention and spirit the present invention.
Claims (15)
1. backlight assembly is characterized in that comprising:
Light source is used to produce light;
Light guide plate, it comprise be formed with interconnective top prism patterns above, the plane of incidence from the light incident of described light source, and below, comprise the bottom prism patterns that mutual isolation forms below described, and be formed between the prism patterns of described bottom and from the described plane of incidence far away more and described above between the interim par that dwindles of distance, described bottom prism patterns comprises first dip plane that direction is formed slopely above described, par from front end, and from second dip plane that upper end direction below described of described first dip plane is formed slopely and is connected with the par of rear end;
Reflectance coating is configured in the bottom of described light guide plate; And
At least one blooming is configured in the top of described light guide plate.
2. backlight assembly according to claim 1 is characterized in that:
Described first dip plane is that benchmark tilts 35 °～50 ° with the normal above described.
3. backlight assembly according to claim 2 is characterized in that:
Described par is vertical with the described plane of incidence.
4. backlight assembly according to claim 2 is characterized in that:
Each described par is far away more from the described plane of incidence, above described to be 0.1 °～0.3 ° of benchmark direction inclination down.
5. backlight assembly according to claim 2 is characterized in that:
The size of described bottom prism patterns changes according to the position.
6. backlight assembly according to claim 2 is characterized in that:
Described bottom prism patterns has the shape of stripes with the parallel formation of the described plane of incidence.
7. backlight assembly according to claim 2 is characterized in that:
Described bottom prism patterns forms irregular tracing pattern.
8. backlight assembly is characterized in that comprising:
Light source is used to produce light;
Light guide plate, comprise be formed with interconnective top prism patterns top, from the plane of incidence of the light incident of described light source and below, comprise the bottom prism patterns that mutual isolation forms below described and be formed between the prism patterns of described bottom and from the described plane of incidence far away more and described above between the par that dwindles apart from stage, described bottom prism patterns comprises the anti-prismatic of n portion, wherein, described n is the natural number more than or equal to 2;
Reflectance coating is configured in the bottom of described light guide plate; And
At least one blooming is configured in the top of described light guide plate.
9. backlight assembly according to claim 8 is characterized in that:
Described anti-prismatic portion comprises:
First dip plane is formed slopely from par or the anti-prismatic portion direction above described of front end; And
Second dip plane is formed slopely from upper end direction below described of described first dip plane, and is connected with the par of rear end or anti-prismatic portion.
10. backlight assembly according to claim 9 is characterized in that:
Described bottom prism patterns also comprises the 3rd dip plane, and described the 3rd dip plane is formed slopely towards the top direction from the lower end of described second dip plane of the anti-prismatic of n portion, and is connected with the par of rear end.
11. backlight assembly according to claim 10 is characterized in that:
Described bottom prism patterns also comprises auxiliary par, and described auxiliary par is formed between the described anti-prismatic portion and/or between described n anti-prismatic portion and described the 3rd dip plane.
12. backlight assembly according to claim 8 is characterized in that:
Described par is vertical with the described plane of incidence.
13. backlight assembly according to claim 8 is characterized in that:
Each described par is far away more from the described plane of incidence, above described to be 0.1 °～0.3 ° of benchmark direction inclination down.
14. backlight assembly according to claim 8 is characterized in that:
Described bottom prism patterns has the shape of stripes with the parallel formation of the described plane of incidence.
15. backlight assembly according to claim 8 is characterized in that:
Described bottom prism patterns forms irregular tracing pattern.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20070099058 | 2007-10-02 | ||
| KR1020070099058A KR101365091B1 (en) | 2007-10-02 | 2007-10-02 | Back light assembly and liquid crystal display apparatus having the same |
| KR2007-0099058 | 2007-10-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101403834A true CN101403834A (en) | 2009-04-08 |
| CN101403834B CN101403834B (en) | 2013-03-20 |
Family
ID=40537895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100888277A Expired - Fee Related CN101403834B (en) | 2007-10-02 | 2008-03-28 | Backlight component |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5273768B2 (en) |
| KR (1) | KR101365091B1 (en) |
| CN (1) | CN101403834B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101054385B1 (en) * | 2009-11-19 | 2011-08-04 | 주식회사 엘엠에스 | Light guide plate and backlight unit having same |
| JP5610202B2 (en) * | 2010-06-23 | 2014-10-22 | ミネベア株式会社 | Surface lighting device |
| KR102157549B1 (en) * | 2010-10-15 | 2020-09-21 | 엘지디스플레이 주식회사 | Backlight Unit and Liquid Crystal Display Device having the same |
| JP5861907B2 (en) * | 2011-04-14 | 2016-02-16 | 株式会社クラレ | Surface light source device and image display device |
| WO2018186413A1 (en) * | 2017-04-04 | 2018-10-11 | 株式会社クラレ | Light guide body and planar light-emitting module |
| JP7122517B2 (en) | 2017-04-27 | 2022-08-22 | パナソニックＩｐマネジメント株式会社 | In-vehicle display device |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2950219B2 (en) * | 1995-10-13 | 1999-09-20 | オムロン株式会社 | Surface light source device, image display device using the surface light source device, and prism array used for the surface light source device |
| JP3644787B2 (en) * | 1996-05-09 | 2005-05-11 | 松下電器産業株式会社 | Planar illumination system |
| US6123431A (en) * | 1997-03-19 | 2000-09-26 | Sanyo Electric Co., Ltd | Backlight apparatus and light guide plate |
| KR100271672B1 (en) * | 1998-05-20 | 2000-11-15 | 구본준 | Sheet type optical device and backlight unit using the same |
| JP3434465B2 (en) * | 1999-04-22 | 2003-08-11 | 三菱電機株式会社 | Backlight for liquid crystal display |
| US6845212B2 (en) * | 1999-10-08 | 2005-01-18 | 3M Innovative Properties Company | Optical element having programmed optical structures |
| JP2002109924A (en) * | 2000-09-28 | 2002-04-12 | Toyota Industries Corp | Light guide plate |
| JP4152605B2 (en) * | 2001-05-30 | 2008-09-17 | 株式会社エンプラス | Light guide plate, surface light source device, and liquid crystal display |
| KR100799156B1 (en) * | 2001-07-13 | 2008-01-29 | 삼성전자주식회사 | Light guided panel and method for fabricating thereof and liquid crystal display device using the same |
| JP2003098356A (en) * | 2001-09-20 | 2003-04-03 | Pioneer Electronic Corp | Light transmission plate |
| KR20050042004A (en) * | 2001-10-31 | 2005-05-04 | 미쯔비시 가가꾸 가부시끼가이샤 | Display apparatus |
| JP2005268201A (en) * | 2004-02-20 | 2005-09-29 | Omron Corp | Surface light source device |
| JP2006344598A (en) * | 2005-06-10 | 2006-12-21 | Samsung Electronics Co Ltd | Light guide plate, and backlight assembly and liquid crystal display (lcd) device with light guide plate |
| KR20060128448A (en) * | 2005-06-10 | 2006-12-14 | 삼성전자주식회사 | Light guide plate , back light assembly and liquid crystal display apparatus having the same |
-
2007
- 2007-10-02 KR KR1020070099058A patent/KR101365091B1/en active IP Right Grant
-
2008
- 2008-02-26 JP JP2008044691A patent/JP5273768B2/en not_active Expired - Fee Related
- 2008-03-28 CN CN2008100888277A patent/CN101403834B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR20090033961A (en) | 2009-04-07 |
| JP5273768B2 (en) | 2013-08-28 |
| KR101365091B1 (en) | 2014-02-19 |
| CN101403834B (en) | 2013-03-20 |
| JP2009087916A (en) | 2009-04-23 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: SAMSUNG DISPLAY CO., LTD. Free format text: FORMER OWNER: SAMSUNG ELECTRONICS CO., LTD. Effective date: 20130109 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20130109 Address after: Gyeonggi Do, South Korea Applicant after: Samsung Display Co.,Ltd. Address before: Gyeonggi Do, South Korea Applicant before: Samsung Electronics Co.,Ltd. |
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Granted publication date: 20130320 Termination date: 20210328 |