CN100555042C

CN100555042C - Backlight assembly

Info

Publication number: CN100555042C
Application number: CNB2005101296494A
Authority: CN
Inventors: 崔盛植; 申东烈; 全在焕; 河周和; 朱炳润; 白晶旭; 崔震成; 金喜坤; 李相勋
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Display Co Ltd
Priority date: 2004-12-21
Filing date: 2005-12-14
Publication date: 2009-10-28
Anticipated expiration: 2025-12-14
Also published as: CN101216637A; CN1794058A; KR101137738B1; CN101216637B; KR20060071026A

Abstract

A kind of backlight assembly comprises: light dispersion member, and this light dispersion member comprises: have the bottom surface section of the slot part that extends along spine that first direction extends with along first direction, these spines and slot part are arranged alternately on this bottom surface section; With along the vertical direction of the described backlight assembly radiation surface relative with described bottom surface section; And light source, this light source has a plurality of light source parts, be limited with equal distance between the light source part adjacent one another are, each light source part all vertically is positioned under each spine, wherein the center of first light source part be sitting at this first light source part on spine between vertically be at interval equate and be 0.2 to 0.55 times of described distance.

Description

Backlight assembly

Technical field

The present invention relates to a kind of backlight assembly and display device with this backlight assembly.Particularly, the present invention relates to a kind of display device that has relative higher brightness and the inhomogeneity backlight assembly of higher brightness and have this backlight assembly.

Background technology

Usually, display device is an image with the data presentation of messaging device.A kind of display apparatus that LCD (" LCD ") equipment comes to this.This LCD equipment comprises liquid crystal (" LC ") layer, control section and luminous component.Control section control liquid crystal (" LC ") layer.Luminous component provides light to the LC layer.

When this LC layer applies electric field, the LC molecule in this LC layer will rearrange.Like this, the transmittance of this LC layer will change.This display device utilizes the variation of this transmittance to come display image.

Control section comprises first substrate with first electrode and second substrate with second electrode.This LC layer is between first substrate and second substrate.Electric field also produces between first electrode and second electrode.

Luminous component included LC layer in control section provides light.This luminous component comprises lamp and optics.This optics can improve brightness and brightness uniformity.

Usually use bar-shaped cold-cathode fluorescence lamp (" CCFL ") as the lamp in the luminous component.And optics comprises the dispersion plate of writing board shape.This dispersion plate is used to suppress the bright band that produced by this CCFL, and and then improves brightness.

But traditional dispersion plate can not be fully or is removed the bright band that CCFL produces effectively.Therefore, the display quality of conventional display apparatus is relatively low.

Summary of the invention

One exemplary embodiment of the present invention provides a kind of backlight assembly, thereby it can remove bright band raising brightness effectively.

One exemplary embodiment of the present invention also provides a kind of display device that comprises this backlight assembly.

According to one exemplary embodiment of the present invention, this backlight assembly comprises: light dispersion member, this light dispersion member comprises: have the bottom surface section of the slot part that extends along spine that first direction extends with along first direction, these spines and slot part are arranged alternately on this bottom surface section; With along the vertical direction of the described backlight assembly radiation surface relative with described bottom surface section; And light source, this light source has a plurality of light source parts, be limited with equal distance between the light source part adjacent one another are, each light source part all vertically is positioned under each spine, wherein the center of first light source part be sitting at this first light source part on spine between vertically be at interval equate and be 0.2 to 0.55 times of described distance.

According to other exemplary embodiment of the present invention, backlight assembly comprises light dispersion member, light source and reflecting plate.This light dispersion member comprises the lower surface with spine and slot part.These spines and slot part are arranged alternately on this bottom surface section.Light source has a plurality of light source parts, is limited with distance between the light source part adjacent one another are.Each light source part all just in time is positioned under each spine.Light source produces light.Reflecting plate is positioned under the light source.Reflecting plate will incide light on it to the lower surface portion sub reflector of astigmatism plate.Between the center of first light source part and the reflecting plate be at interval equate and be about 0.10 to about 0.25 times of this distance.

According to other exemplary embodiment of the present invention, backlight assembly comprises light dispersion member, light source and reflecting plate.This light dispersion member comprises the lower surface with spine and slot part.These spines and slot part are arranged alternately on this bottom surface section.Light source has a plurality of light source parts, is limited with distance between the light source part adjacent one another are.Each light source part all is positioned under each spine.Light source produces light.Reflecting plate is positioned under the light source.Reflecting plate will incide light on it to the lower surface portion sub reflector of astigmatism plate.The center of first light source part and be sitting at first between the spine on this first light source part and be spaced apart about 0.2 to about 0.55 times of this distance.Between the center of first light source part and the reflecting plate second is approximately 0.10 to 0.25 times of this distance at interval.According to other exemplary embodiment of the present invention, display device comprises lamp, light dispersion member, reflecting plate and display board.Described lamp produces light.The substantially parallel each other arrangement of these lamps, and have predetermined distance between the center of adjacent lamps.This light dispersion member comprises the lower surface with spine and slot part.These spines and slot part are arranged alternately on this bottom surface section.This light dispersion member is positioned on these lamps.Between the center of each spine and its corresponding each lamp first is approximately 0.2 to 0.55 times of this distance at interval.Reflecting plate is positioned under these lamps.Reflecting plate will incide light on it to the lower surface portion sub reflector of astigmatism plate.Between each lamp and the reflecting plate second is approximately 0.10 to 0.25 times of this distance at interval.Display board is positioned on the astigmatism plate.Display board utilizes the light display image that penetrates from astigmatism plate.

According to other exemplary embodiment of the present invention, backlight assembly comprises a plurality of light sources, astigmatism plate and fixed part.Light source produces light and extends along first direction.This astigmatism plate will incide the light scattering on it.Astigmatism plate has spine's part, and described spine has partly defined first lower surface facing to light source.This spine partly has a plurality of spines of extending along first direction.The fixing member supports astigmatism plate.This astigmatism plate has second lower surface that is supported on this fixed part.This second lower surface has the part of substantially flat.

According to other exemplary embodiment of the present invention, backlight assembly comprises a plurality of light sources, astigmatism plate and fixed part.Light source produces light and extends along first direction.This astigmatism plate is with the light scattering of incident on it.Astigmatism plate has spine's part, and described spine has partly defined the whole lower surface of this astigmatism plate.This spine partly comprises basically a plurality of spines of extending along first direction.The fixing member supports astigmatism plate.The core of this lower surface is facing to light source, and the marginal portion of this lower surface is supported on the fixed part.

According to other exemplary embodiment of the present invention, flat panel display equipment comprises flat display panel and backlight assembly.This flat display panel display image.This backlight assembly comprises a plurality of light sources, astigmatism plate and fixed part.Light source produces light and extends along first direction.This astigmatism plate will incide the light scattering on it.Astigmatism plate has spine's part, and described spine has partly defined first lower surface facing to light source.This spine partly has basically a plurality of spines of extending along first direction.Fixed part supports astigmatism plate thereon.This astigmatism plate has second lower surface that is supported on this fixed part.This second lower surface has the part of substantially flat.

According to other exemplary embodiment of the present invention, backlight assembly comprises the light source and first optics.Light source produces first light with first brightness and second light with second brightness.The rank that is superior to this first brightness of second brightness.First optics is positioned at the light source top.First optics comprises the first with first vertical thickness and has the second portion of second vertical thickness.This second thickness is basically greater than first thickness.First is positioned at the position of the first smooth incident.Second portion is positioned at the position of the second smooth incident.

According to other exemplary embodiment of the present invention, display device comprises backlight assembly and display board.Backlight assembly comprises the light source and first optics.Light source produces first light with first brightness and second light with second brightness.The rank of second brightness is higher than the rank of this first brightness basically.First optics is positioned at the light source top.First optics comprises the first with first vertical thickness and has the second portion of second vertical thickness.This second thickness is basically greater than first thickness.First is positioned at the position of the first smooth incident.Second portion is positioned at the position of the second smooth incident.Display board is positioned at the top of backlight assembly.The light that display board utilizes backlight assembly to penetrate comes display image.

According to other exemplary embodiment of the present invention, the light dispersion member of backlight assembly comprises and is used to penetrate the first surface of light and is used to receive the second surface of penetrating the light that comes from light source, thereby this second surface has a plurality of spines and the slot part alternately arranged forms bellows-shaped, and the thick of this light dispersion member approximately is 1.15 to 1.75 times of the thinnest part of light dispersion member.

Therefore, according to exemplary embodiment of the present invention, the light dispersion member of scattered light has irregular thickness, thereby can improve brightness and brightness uniformity.In addition, display device can show the image that has than high display quality.

In addition, backlight assembly does not need to comprise comparatively expensive double-deck brightness improvement film.Therefore, the cost of the described backlight assembly of manufacturing exemplary embodiment of the present will be less than the required cost of the backlight assembly with double-deck brightness improvement film.

Description of drawings

By detailed description below in conjunction with accompanying drawing, can clearer understanding above-mentioned and other advantages of the present invention.

Fig. 1 is the skeleton view after decomposing, and shows the one exemplary embodiment of the backlight assembly according to the present invention.

Fig. 2 shows the planimetric map of the exemplary light dispersion member among Fig. 1.

Fig. 3 shows the sectional view after the I-I ' line among Fig. 2 cutting.

Fig. 4 is a chart, shows the Luminance Distribution of the light that the first surface of the exemplary light dispersion member from Fig. 3 emits.

Fig. 5 is a chart, shows the brightness and the brightness uniformity that utilize the statistical analysis software analysis to obtain.

Fig. 6 is a chart, shows the relation between the A1 at interval of first among brightness and Fig. 3.

Fig. 7 is a chart, shows the relation between the A2 at interval of second among brightness and Fig. 3.

Fig. 8 is a sectional view, shows the one exemplary embodiment of the backlight assembly according to the present invention.

Fig. 9 is a sectional view, shows the one exemplary embodiment of the backlight assembly according to the present invention.

Figure 10 is a sectional view, shows the one exemplary embodiment of the backlight assembly according to the present invention.

Figure 11 is a sectional view, shows the one exemplary embodiment of the display device according to the present invention.

Figure 12 is the decomposition diagram of the exemplary display device among Figure 11.

Figure 13 illustrates the decomposition diagram of the one exemplary embodiment of backlight assembly of the present invention.

Figure 14 illustrates the partial, exploded perspective view at the back of the exemplary backlight assembly among Figure 13.

Figure 15 illustrates the skeleton view of the combination on exemplary inhomogeneous astigmatism plate shown in Figure 14 and exemplary chassis.

Figure 16 is an enlarged drawing, and the part " A " among Figure 15 is shown.

Figure 17 is the sectional view after cutting along the II-II ' line among Figure 15.

Figure 18 is a decomposition diagram, and the one exemplary embodiment of backlight assembly of the present invention is shown.

Figure 19 illustrates the skeleton view of the exemplary backlight assembly shown in Figure 18.

Figure 20 illustrates the amplification sectional view after the III-III ' line among Figure 19 cutting.

Figure 21 is a decomposition diagram, and the exemplary flat panel display equipment of the backlight assembly with one exemplary embodiment of the present invention is shown.

Figure 22 is a skeleton view, and the one exemplary embodiment of backlight assembly of the present invention is shown.

Figure 23 illustrates the sectional view after the IV-IV ' line among Figure 22 cutting.

Figure 24 A-24C illustrates the chart that brightness changes with respect to the position.

Figure 25 is a skeleton view, and the one exemplary embodiment of display device of the present invention is shown.

Embodiment

Describe the present invention below with reference to accompanying drawings, in these accompanying drawings, embodiments of the invention have been shown.But, the form realization that the present invention also can be much different, and be not limited to described embodiment.The proposition of these embodiment is comprehensive and complete in order to be disclosing of instructions, thereby makes those skilled in the art can understand scope of the present invention.In the accompanying drawings, for purpose clearly, the shown layer and the size and the relative size in zone all are exaggerated.Be to be understood that when element or layer and be described to " being in " or ' attach ' to other elements or layer when going up, this element or the layer can be directly be in be connected to other elements or the layer on, perhaps these elements and the layer between also may occur other intermediary element or the layer.

In instructions full text, identical Reference numeral is represented components identical.

Though should be appreciated that and use first, second vocabulary such as grade to describe different elements, parts or layer in instructions, these elements, parts or layer are not subjected to the restriction of these vocabulary.These vocabulary only are used for these elements, parts or layer be distinguished from each other and come.Therefore, hereinafter first element of Miao Shuing, parts or layer also can be called as second element, parts or layer, and this variation does not break away from instruction of the present invention.

Vocabulary with space correlation, for example " ... under ", " ... following ", " lower ", " ... on ", " top " etc., can be used for describing easily other elements of an element or feature and figure or the relation between the feature.Should be appreciated that except the direction shown in the figure, the vocabulary of these and space correlation comprised also that this equipment uses or operation in other different directions.For example, if equipment is reversed among the figure, then describes the element that is in other elements or feature " following " in the instructions and will become " top " that is in these other elements or feature.Therefore, this exemplary speech meeting " ... under " will comprise top and following both direction.This equipment also can be towards other directions (revolve turn 90 degrees or become other directions), and can correspondingly make an explanation with descriptor space correlation to employed this moment.

Term used herein only is in order to describe certain embodiments, rather than in order to limit the present invention.Such as used herein, " one " or " being somebody's turn to do " of singulative have comprised plural form too, unless context relation has clearly shown other relations.Be to be understood that the vocabulary that uses in the instructions " comprises " appearance of refering in particular to described feature, element or parts, but do not get rid of the appearance or the increase of one or more other features, element or parts.

Unless otherwise defined, otherwise the implication of all vocabulary used herein (comprise technical with scientific and technical terms) all the implication with those of ordinary skills' common sense is identical.Be to be understood that a lot of vocabulary in addition, the vocabulary defined in normally used dictionary for example, all should explain its implication, limit, otherwise can not make an explanation to it with idealized or too formal mode unless have in addition clearly according to its environment in correlation technique.

Below with reference to accompanying drawings a plurality of embodiment of the present invention are described.

Fig. 1 illustrates the decomposition diagram of the one exemplary embodiment of backlight assembly of the present invention.Fig. 2 illustrates the planimetric map of the exemplary light dispersion member among Fig. 1.Fig. 3 illustrates along the sectional view of I-I ' line among Fig. 2.

Referring to figs. 1 through 3, backlight assembly 500 comprises light dispersion member 105, light source 300 and reflector 330.

Light dispersion member 105 have first surface 110 and with the opposing second surface 120 of first surface 110.This light dispersion member 105 is the rectangular flat shape, and other shapes are also in the scope of these embodiment certainly.Light dispersion member 105 can comprise polymethylmethacrylate (" PMMA ").The light that incides on the second surface 120 of light dispersion member 105 will disperse in light dispersion member 105, and the first surface 110 from this light dispersion member 105 penetrates then.

As shown in Figure 3, these first surface 110 substantially flats promptly are flat shape substantially.On the other hand, formed optics 130, so second surface 120 is basic uneven and be not a plane in the bottom surface section of this light dispersion member 105.Because second surface 120 unevennesses, therefore can improve the brightness and the brightness uniformity of the light that penetrates from the first surface 110 of light dispersion member 105.

With reference to Fig. 3, this optics 130 comprises at least one slot part 132 and at least one spine 134.Each slot part 132 all is connected with in these spines 134 at least one.

These slot parts 132 are formed on the bottom surface section of light dispersion member 105, and have predetermined space each other.These slot parts 132 extend along the direction parallel with the side of backlight assembly, and remain parallel to each other basically.The first curvature radius R1 of slot part 132.This first curvature radius R1 can be that about 0.5mm is between about 1mm.

Furtherly, spine 134 and slot part 132 are alternately to form on the bottom surface section of light dispersion member 105.This spine 134 is connected between two slot parts 132 adjacent one another are.In other words, this slot part 132 is connected between two spines 134 adjacent one another are.Therefore, spine 134 is same parallel to each other and parallel with slot part 132.

Each spine 134 all has second curvature radius R2.This second curvature radius R2 can be between about 0.5mm and the about 1mm.This spine 134 is the semi-circular cylindrical shape.In other words, the cross section of this spine 134 is a circular arc, and extends along the surface of light dispersion member 105.Owing to described semi-cylindrical form, so other shapes should be also in the scope of these embodiment.

For effective brightness and brightness uniformity of improving, accurately second thickness T 2 of the second portion of first thickness T 1 of the first of control light dispersion member 105 and light dispersion member 105.Here, first is meant the part that forms slot part 132, and second portion is meant the part that forms spine 134.This first thickness T 1 can be that about 1.5mm is between about 2.0mm.First thickness T 1 is the thickness that the thinnest point measurement in this light dispersion member 105 obtains, and second thickness T 2 is the thickness that the thickest point in this light dispersion member 105 measures.

Fig. 4 is a chart, and the Luminance Distribution of the light that the first surface of the exemplary light dispersion member from Fig. 3 penetrates is shown.

With reference to Fig. 3 and 4, the X-axis of this chart is represented second thickness T 2 of light dispersion member 105.The Y-axis of this chart is represented from the brightness of the light of first surface 110 ejaculations of light dispersion member 105.

For the result shown in the chart of Fig. 4, this light dispersion member 105 comprises PMMA.First curvature radius R1 is approximately 0.5mm.Second curvature radius R2 is approximately 1mm.Provide the light source 300 of light just in time to be positioned under the spine 134 to light dispersion member 105.Interval between each corresponding light source parts in each spine 134 and the light source 300 is approximately 11.8mm.The interval of two light source parts adjacent one another are in a plurality of light source parts of light source 300 is approximately 20.0mm.The brightness of the light that penetrates from the first surface 110 of light dispersion member 105 is the mean value of measured first to the 9th brightness that obtains of first to the 9th measurement point on this first surface 110.

With reference to Fig. 4, when second thickness T 2 when about 1.0 multiplications of first thickness T 1 are added to 1.80 times of this first thickness T 1, the brightness of the light that penetrates from first surface 110 also can increase basically.

This brightness has been shown in the table 1 to be increased along with the increase of second thickness T 2.

[table 1]

In comparative example 1, second thickness T 2 is identical with first thickness T 1 basically, that is, and and T2=1.0T1.The brightness of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 11,500nit.Here " nit " is meant the measured value of light, and its unit is candela/every square metre of (Cd/m ²).

In example 1, second thickness T 2 is approximately 1.15 times of first thickness T 1,1.25 times of first thickness T 1,1.3 times or 1.35 times of first thickness T 1 of first thickness T 1.

In example 1, when second thickness T 2 of light dispersion member 105 was approximately 1.15 times of first thickness T 1, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 was approximately 12,140nit.Therefore, the brightness when T2=1.15T1 is greater than the brightness in the comparative example 1.

In example 1, when second thickness T 2 of light dispersion member 105 was approximately 1.25 times of first thickness T 1, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 was approximately 13,476nit.Therefore, the brightness when T2=1.25T1 is greater than the brightness in the comparative example 1, also greater than the brightness when the T2=1.15T1.

In example 1, when second thickness T 2 of light dispersion member 105 was approximately 1.30 times of first thickness T 1, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 was approximately 13,720nit.Therefore, the brightness when T2=1.3T1 is greater than the brightness in the comparative example 1, also the brightness greater than as T2=1.15T1 with as T2=1.25T1 the time.

In example 1, when second thickness T 2 of light dispersion member 105 was approximately 1.35 times of first thickness T 1, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 was approximately 13,980nit.Therefore, the brightness when T2=1.35T1 is greater than the brightness in the comparative example 1, also greater than the brightness when T2=1.15T1,1.25T1 and the 1.3T1.

Therefore, the brightness of example 1 is greater than the brightness of comparative example 1, and this brightness increases from 1.15T1 to 1.35T1 and increases along with T2.

In example 2, this second thickness T 2 is approximately 1.40 times of first thickness T 1,1.45 times of first thickness T 1,1.50 times or 1.55 times of first thickness T 1 of first thickness T 1.

In example 2, when second thickness T 2 of light dispersion member 105 was approximately 1.40 times of first thickness T 1, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 was approximately 14,050nit.Therefore, the brightness when T2=1.4T1 is greater than the brightness in the comparative example 1, also greater than the brightness in the example 1.

In example 2, when second thickness T 2 of light dispersion member 105 was approximately 1.45 times of first thickness T 1, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 was approximately 14,080nit.Therefore, the brightness when T2=1.45T1 is greater than the brightness in comparative example 1 and the example 1, also greater than the brightness when the T2=1.4T1.

In example 2, when second thickness T 2 of light dispersion member 105 was approximately 1.50 times of first thickness T 1, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 was approximately 14,130nit.Therefore, the brightness when T2=1.5T1 is greater than the brightness in comparative example 1 and the example 1, also the brightness greater than as T2=1.4T1 with as T2=1.45T1 the time.

In example 2, when second thickness T 2 of light dispersion member 105 was approximately 1.55 times of first thickness T 1, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 was approximately 14,220nit.Therefore, the brightness when T2=1.55T1 is greater than the brightness in comparative example 1 and the example 1, also greater than the brightness when T2=1.4T1,1.45T1 and the 1.5T1.

Therefore, the brightness of example 2 is greater than the brightness in comparative example 1 and the example 1, and the brightness in the example 2 increases from 1.4T1 to 1.55T1 and increases along with T2.

In example 3, this second thickness T 2 is approximately 1.60 times or 1.67 times of first thickness T 1 of first thickness T 1.

In example 3, when second thickness T 2 of light dispersion member 105 was approximately 1.60 times of first thickness T 1, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 was approximately 14,400nit.Therefore, the brightness when T2=1.6T1 is greater than the brightness in comparative example 1, example 1 and the example 2.

In example 3, when second thickness T 2 of light dispersion member 105 was approximately 1.67 times of first thickness T 1, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 was approximately 14,500nit.Therefore, the brightness when T2=1.67T1 is greater than the brightness in comparative example 1, example 1, the example 2, also greater than the brightness when the T2=1.6T1.

Therefore, the brightness of example 3 is greater than the brightness in comparative example 1, example 1 and the example 2, and the brightness in the example 3 increases from 1.6T1 to 1.67T1 and increases along with T2.

In example 4, this second thickness T 2 is approximately 1.70 times of first thickness T 1.

In example 4, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 13,400nit.Therefore, though this brightness is less than the brightness in example 2 and the example 3, but still greater than the brightness in the comparative example 1.

Though in Fig. 4, do not illustrate especially,, will reduce gradually from the brightness of the light of first surface 110 ejaculations of light dispersion member 105 when the 1.70 multiplication added-time of second thickness T 2 from about first thickness T 1.

In addition, though do not illustrate especially in Fig. 4, when second thickness T 2 is approximately 1.80 times of first thickness T 1, brightness will equal the brightness in the comparative example 1 substantially.

In sum, the variation of brightness is relevant with second thickness T 2 with first thickness T 1.The measured brightness that obtains will be greater than the measured brightness that obtains when second thickness T 2 equals first thickness T 1 substantially between 1.80 times the time when second thickness T 2 is approximately 1.15 times of first thickness T 1.

With reference to Fig. 4 and table 1, when second thickness T 2 is approximately 1.67 times of first thickness T 1, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 will be very high.

Can determine the brightness of the light that penetrates from the light dispersion member 105 that comprises optics 130 by formula 1 and formula 2, wherein this optics 130 has slot part 132 and spine 134, will be explained below.

Determine that the required data of this brightness are distance D, height H, first curvature radius R1, second curvature radius R2 and second thickness T 2.Here, distance D is the measuring distance between two light source parts adjacent one another are of light source 300.Height H is light source part in the light source 300 and the measuring distance between the corresponding spine 134.

Distance D, height H, first curvature radius R1, second curvature radius R2 and second thickness T 2 have been provided in the table 2.

[table 2]

Numbering	D(mm)	H(mm)	R2(mm)	R1(mm)	T2(mm)	Brightness (nit)	Homogeneity (%)
Numbering	D(mm)	H(mm)	R2(mm)	R1(mm)	T2(mm)	Brightness (nit)	Homogeneity (%)	1	20	11.8	0.5	0.5	2	14200	77
2	30	11.8	0.5	0.5	1	13200	69	1	20	11.8	0.5	0.5	2	14200	77
2	30	11.8	0.5	0.5	1	13200	69	3	20	17.6	0.5	0.5	1	13420	78
4	30	17.6	0.5	0.5	2	12800	76	3	20	17.6	0.5	0.5	1	13420	78
4	30	17.6	0.5	0.5	2	12800	76	5	20	11.8	1	0.5	1	12980	87
6	30	11.8	1	0.5	2	13200	92	5	20	11.8	1	0.5	1	12980	87
6	30	11.8	1	0.5	2	13200	92	7	20	17.6	1	0.5	2	12600	90
8	30	17.6	1	0.5	1	12900	85	7	20	17.6	1	0.5	2	12600	90
8	30	17.6	1	0.5	1	12900	85	9	20	11.8	0.5	1	1	13600	88
10	30	11.8	0.5	1	2	13100	81	9	20	11.8	0.5	1	1	13600	88
10	30	11.8	0.5	1	2	13100	81	11	20	17.6	0.5	1	2	13000	86
12	30	17.6	0.5	1	1	13300	84	11	20	17.6	0.5	1	2	13000	86
12	30	17.6	0.5	1	1	13300	84	13	20	11.8	1	1	2	13350	81
14	30	11.8	1	1	1	13450	72	13	20	11.8	1	1	2	13350	81
14	30	11.8	1	1	1	13450	72	15	20	17.6	1	1	1	12700	77
16	30	17.6	1	1	2	12300	79	15	20	17.6	1	1	1	12700	77

Wherein, brightness and brightness uniformity are analog results.

Utilize the data of statistical analysis software in can analytical table 2, thereby can predict the brightness of the light that penetrates from the first surface 110 of light dispersion member 105.

This statistical analysis software can be Minitab ^TMStatistical software.As Minitab with the Minitab company of USA ^TMWhen software uses as statistical analysis software, this luminance accuracy will be no less than 95%.

Brightness also can change according to overall coefficient, distance coefficient, height coefficient, first curvature radius coefficient, second curvature radius coefficient and second thickness coefficient.

Specifically, overall coefficient is approximately 15787.5.Distance coefficient is approximately-20.0.Height coefficient is approximately-87.5.The first curvature radius coefficient is approximately-125.The second curvature radius coefficient is approximately-785.0.Second thickness coefficient is approximately-125.

[formula 1]

Brightness (nit)=15787.5-20D-87.5H-785R2-125R1-125T2.

Formula 1 and the data relevant with distance D, height H, first curvature radius R1, second curvature radius R2 and second thickness T 2 can be determined the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 together.The precision of this brightness approximately is not less than 95%.

Can also utilize the data in the statistical analysis software analytical table 2, thereby prediction is from the brightness uniformity of the light of first surface 110 ejaculations of light dispersion member 105.

This statistical analysis software can be Minitab ^TMStatistical software.As Minitab with the Minitab company of the U.S. ^TMWhen software uses as statistical analysis software, this luminance accuracy will be no less than 95%.

Brightness uniformity also can change according to overall coefficient, distance coefficient, height coefficient, first curvature radius coefficient, second curvature radius coefficient and second thickness coefficient.

Specifically, overall coefficient is approximately 43.47.Distance coefficient is approximately-0.325.Height coefficient is approximately 0.172.The first curvature radius coefficient is approximately 61.5.The second curvature radius coefficient is approximately 54.Second thickness coefficient is approximately 4.75.

[formula 2]

Brightness uniformity (%)=43.47-0.325D+0.172H+54R2+61.5R1-4.75T2.

Formula 2 and the data relevant with distance D, height H, first curvature radius R1, second curvature radius R2 and second thickness T 2 can be determined the brightness uniformity of the light that penetrates from the first surface 110 of light dispersion member 105 together.The precision of this brightness uniformity approximately is not less than 95%.

Fig. 5 is a chart, and the brightness and the brightness uniformity that utilize statistical analysis software to analyze are shown.

With reference to table 2 and Fig. 5, when distance D, height H, second curvature radius R2, first curvature radius R1 and second thickness T 2 were approximately 20mm, 11.8mm, 1.0mm, 0.5mm, 2.0mm respectively, brightness was relative with brightness uniformity higher.Specifically, this brightness and brightness uniformity are respectively 13,260nit and 92.25%.

Light source 300 is faced the second surface 120 of light dispersion member 105, and corresponding with the spine 134 of this light dispersion member 105.That is, the light source part in the light source 300 just in time is positioned at the below of each spine 134 of light dispersion member 105.

The cold-cathode lamp that this light source 300 can be a cylindrical shape (" CCFL ").But light source 300 also can be many conspicuous deformed shape.As an example, this light source 300 can be clavate.In another example, this light source can be U-shaped.And in another example, this light source can be C shape.Each light source part in the light source 300 can equally with the other light sources parts be of similar shape.Perhaps, these light source parts also can have configurations differing from one, but finally should be installed in the backlight assembly 500.

Reflecting plate 330 is relative with the second surface 120 of light dispersion member 105.This light source 300 is between reflecting plate 330 and light dispersion member 105.The light that is incident on the reflecting plate 330 will be reflected on the light dispersion member 105.

The first interval A1 and the second interval A2 will greatly influence from the brightness and the brightness uniformity of the light of first surface 110 ejaculations of light dispersion member 105.This first interval A1 is meant the central shaft of spine 134 and light source 300, for example measuring distance between the longitudinal axis.This second interval A2 is meant the central shaft of light source 300 and the measuring distance between the reflecting plate 330.Should be appreciated that the interval of first between the corresponding light source parts in each spine and the light source 300 A1 should be identical.Similarly, second between each light source part in the light source 300 and the reflecting plate 330 at interval A2 also should be identical.

Hereinafter, with describe brightness and first at interval between the A1, brightness uniformity and first relation between the A1 at interval.

The experiment that brightness changes according to the interval of first between the central shaft of spine and light source A1.

With reference to Fig. 3 and 6, the distance D in the light source 300 between two light source parts located adjacent one another is approximately 25.4mm.Each light source part in this light source 300 all is positioned at the below of each spine 134 of light dispersion member 105.The X-axis of the chart among Fig. 6 is represented the brightness measurement point.The Y-axis of the chart among Fig. 6 is represented brightness.

Line 1 shows the brightness that measures when A1 is approximately 3mm at interval as first among Fig. 3.Line 2 shows the brightness that measures when A1 is approximately 7mm at interval as first among Fig. 3.Line 3 shows the brightness that measures when A1 is approximately 10mm at interval as first among Fig. 3.Line 4 shows the brightness that measures when the first interval A1 is approximately 12mm.Line 5 shows the brightness that measures when A1 is approximately 14mm at interval as first among Fig. 3.

As shown in Figure 6, when first between the central shaft of the light source part in spine 134 and the light source 300 at interval A1 be approximately 7mm between 12mm the time, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 is suitable for display image.But when first when at interval A1 is not more than 3mm or is not less than 14mm, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 will no longer be fit to display image.

Though in Fig. 6, do not illustrate especially, when the first interval A1 is approximately 3mm, be approximately 83.3% from the brightness uniformity of the light of first surface 110 ejaculations of light dispersion member 105.When first when at interval A1 is approximately 7mm, the brightness uniformity of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 92.2%.When first when at interval A1 is approximately 10mm, the brightness uniformity of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 93.3%.When first when at interval A1 is approximately 12mm, the brightness uniformity of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 90.2%.When first when at interval A1 is approximately 14mm, the brightness uniformity of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 90.2%.

As mentioned above, when first at interval A1 be approximately 7mm between 14mm the time, the brightness uniformity of the light that penetrates from the first surface 110 of light dispersion member 105 will be not less than 90%.That is, when first between the central shaft of the light source part in spine 134 and the light source 300 at interval A1 be approximately 7mm between 14mm the time, display quality is higher relatively.

On the other hand, when first between the central shaft of the light source part in spine 134 and the light source 300 when at interval A1 is less than 3mm, the brightness uniformity of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 83%.That is, when the first interval A1 was not more than 3mm, display quality was relatively low, and this is because the bright band that light source 300 is produced will have a negative impact to display quality.

Therefore, take all factors into consideration brightness and brightness uniformity, first between the central shaft of the light source part of spine 134 and light source 300 at interval A1 is preferably 7mm to about the 12.5mm.

According to one exemplary embodiment of the present invention, the first interval A1 can be about 0.2 to 0.55 times of distance D.When special, when first at interval A1 be between about 0.286 to 0.51 times of distance D the time, display quality is higher relatively.Therefore, this first at interval A1 be preferably between about 0.286 to 0.51 times of distance D.

Below, brightness and second relation between the A2 at interval will be described.As mentioned above, this second at interval A2 be meant the central shaft of light source part of light source 300 and the measuring distance between the reflecting plate 330.

Brightness is according to the experiment that changes of A2 at interval of second between the central shaft of light source and the reflecting plate.

With reference to Fig. 3 and 7, the distance D in the light source 300 between two light source parts located adjacent one another is approximately 25.4mm.Each light source part in this light source 300 all is positioned at the below of each spine 134 of light dispersion member 105.The X-axis of the chart among Fig. 7 is represented the brightness measurement point.The Y-axis of the chart among Fig. 7 is represented brightness.

Line 1 shows the brightness that measures when A2 is approximately 3.1mm at interval as second among Fig. 3.Line 2 shows the brightness that measures when A2 is approximately 3.4mm at interval as second among Fig. 3.Line 3 shows the brightness that measures when A2 is approximately 4.3mm at interval as second among Fig. 3.Line 4 shows the brightness that measures when A2 is approximately 5.2mm at interval as second among Fig. 3.Line 5 shows the brightness that measures when A2 is approximately 6.3mm at interval as second among Fig. 3.Line 6 shows the brightness that measures when A2 is approximately 7.3mm at interval as second among Fig. 3.Line 7 shows the brightness that measures when A2 is approximately 8.3mm at interval as second among Fig. 3.

As shown in Figure 7, when second between the central shaft of the light source part in the light source 300 and the reflecting plate 330 at interval A2 be approximately 3.4mm between 5.2mm the time, the brightness ratio of the light that penetrates from the first surface 110 of light dispersion member 105 is fit to display image.But when second when at interval A2 is less than 3.1mm or greater than 7.3mm, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 will no longer be fit to display image.

Therefore, consider brightness, second between the central shaft of the light source part of light source 300 and the reflecting plate 330 A2 at interval is preferably 3.1mm between the 5.4mm.

According to one exemplary embodiment of the present invention, the distance D between the light source adjacent one another are is approximately 25.4mm.But the distance D that the size of the whole display device that should be appreciated that this exemplary backlight assembly integrated changes between the light source that will cause in this backlight assembly changes equally, and therefore the spacing of describing herein all only is exemplary.

According to exemplary embodiment of the present invention, second at interval A2 can be between about 0.10 to 0.25 times of distance D.When special, when second at interval A2 be between about 0.139 to 0.212 times of distance D the time, display quality is higher relatively.Therefore, this second at interval A2 be preferably between about 0.139 to 0.212 times of distance D.

Below, will describe brightness and brightness uniformity according to first at interval A1 and second at interval the variation of A2 change.

Comparative example

[table 3]

Wherein, " E5 ", " E6 ", " E7 ", " E8 " and " C2 " represent example 5, example 6, example 7, example 8 and comparative example 2 respectively.

With reference to table 3, in comparative example 2, the first interval A1, the second interval A2 and the 3rd A3 at interval are approximately 16.1mm, 6mm and 22.1mm respectively.

The second interval A2 is meant the central shaft of light source and the measuring distance between the reflecting plate.First at interval A1 be meant measuring distance between the central shaft of light dispersion member and light source.The 3rd interval A3 is meant the measuring distance between light dispersion member and the reflecting plate.Therefore, the 3rd interval A3 is the first interval A1 and second summation of A2 at interval.

According to comparative example 2, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 12,408bit.Wherein, this brightness is at the mean value that is positioned at measured first to the 9th brightness that obtains of lip-deep first to the 9th measurement point of light dispersion member, and this first surface is positioned at the position that light penetrates.In addition, the brightness uniformity of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 93.3%.

With reference to table 3, in routine 5-8, the second interval A2 and first A1 at interval is approximately 3.5mm and 10.0mm respectively.

In example 5, light dispersion member 105 is not for disperseing the dispersion plate of pattern.According to example 5, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 13,027nit.Wherein, this brightness is that this surface is positioned at light-struck position at the mean value that is positioned at measured first to the 9th brightness that obtains of lip-deep first to the 9th measurement point of dispersion plate.In addition, the brightness uniformity of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 93.0%.That is, the brightness of example 5 is greater than the brightness of comparative example 2.

In example 6, light dispersion member 105 is for having the dispersion plate that disperses pattern.According to example 6, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 12,906nit.Wherein, this brightness is that this surface is positioned at light-struck position at the mean value that is positioned at measured first to the 9th brightness that obtains of lip-deep first to the 9th measurement point of dispersion plate.In addition, the brightness uniformity of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 95.6%.That is, the brightness of example 6 is basically greater than the brightness of comparative example 2.

In example 7, light dispersion member 105 is an optical plate.According to example 7, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 13,372nit.Wherein, this brightness is that this surface is positioned at light-struck position at the mean value that is positioned at measured first to the 9th brightness that obtains of lip-deep first to the 9th measurement point of optical plate.In addition, the brightness uniformity of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 85.5%.Like this, the brightness of example 7 is basically greater than the brightness of comparative example 2, but brightness uniformity is less.

In example 8, light dispersion member 105 is the dispersion plate that comprises lower surface, and light is mapped on this lower surface.This lower surface have basically with Fig. 3 in previous shown in identical bellows-shaped.According to example 8, the brightness of the light that penetrates from the first surface 110 of light dispersion member 105 is greater than being 13,462nit.Wherein, this brightness is that this upper surface is positioned at light-struck position at the mean value that is positioned at measured first to the 9th brightness that obtains of first to the 9th measurement point on the dispersion plate upper surface.In addition, the brightness uniformity of the light that penetrates from the first surface 110 of light dispersion member 105 is approximately 92.0%.Therefore, the brightness of example 8 is basically greater than the brightness of comparative example 2.

According to table 3, the second interval A2 by between the first interval A1 between change light dispersion member 105 and the light source 300 and light source 300 and the reflecting plate 330 can improve brightness and brightness uniformity.

In addition, as shown in table 3, when light dispersion member is writing board shape, only by change first at interval A1 and second at interval A2 just can improve brightness and brightness uniformity.Promptly, if this writing board shape does not have dispersion pattern as described in an exemplary embodiment of the present invention, then can not improve brightness and brightness uniformity by the relative thickness that limits T1 and T2 as the present invention, only can by change first at interval A1 and second at interval A2 improve brightness and brightness uniformity.

Referring again to Fig. 1, this backlight assembly 500 comprises light dispersion member 105 and receiving vessel 320.This receiving vessel 320 is used to hold light source 300.

This receiving vessel 320 comprises base plate 321 and sidewall 323.This base plate 321 is generally rectangle, but other shapes also should be included in the scope of these embodiment.This sidewall 323 extends out from the periphery of base plate 321.This base plate 321 and sidewall 323 define one together and receive recess, and this reception recess can hold light dispersion member 105 and light source 300.

This backlight assembly 500 also comprises a phase inverter 400.This phase inverter 400 be positioned at receiving vessel 320 base plate 321 below.That is, the first surface of base plate 321 is in the face of light source 300, and the second surface of base plate 321 leaves light source 300, and phase inverter 400 is positioned on the second surface of this base plate 321.This phase inverter 400 can provide the driving energy to light source 300, thereby makes light source 300 produce light.

Backlight assembly 500 also comprises shielding case 420.Utilize this shielding case 420 to cover this phase inverter 400, thereby can utilize this shielding case 420 to stop harmful microwave that phase inverter 400 is produced.This shielding case 420 can combine with base plate 321.

Backlight assembly 500 comprises reflecting plate 330.This reflecting plate 330 is between the base plate 321 of light source 300 and receiving vessel 320.That is, reflecting plate 330 is positioned on the first surface of base plate 321 of receiving vessel 320.This reflecting plate 330 can be with incident light thereon to light dispersion member 105 reflections.Therefore, the amount that incides the light on the light dispersion member 105 will increase.

Backlight assembly 500 comprises light source supporter 350.Light source part in the light source 300 and this light source supporter 350 are fixed together.This light source supporter 350 is fixed together with receiving vessel 320.Like this, light source 300 is fixed together with regard to same and receiving vessel 320.Perhaps, this light source supporter 350 can be fixing with reflecting plate 330, and this reflecting plate 330 is fixed together with receiving vessel 320.

Backlight assembly 500 comprises the mold frame 360 of the end that covers light source 300.This mold frame 360 can support the light dispersion member 105 on it.This mold frame 360 can along with light source 300 in the vertical substantially direction of the longitudinal direction of light source part extend.

On the sidewall sections of light dispersion member 105, formed the combination groove.Raise up from this mold frame 360 and to form the combination projection.The combination groove of this light dispersion member 105 is corresponding to the combination projection of mold frame 360.The combination groove of this light dispersion member 105 can with the combination combination of protrusions of mold frame 360 together, thereby this light dispersion member 105 can not moved with respect to mold frame 360 basically.

Perhaps, this light dispersion member 105 can have from the sidewall sections of the light dispersion member combination projection to lower convexity.In this case, mold frame 360 should comprise the combination groove that combines with this combination projection of light dispersion member 105.

Disperse thin layer 370 can be positioned on the light dispersion member 105.The light that this dispersion thin layer 370 can penetrate the first surface from light dispersion member 105 spreads out.

Prism thin layer 380 is positioned on this dispersion thin layer 370.This prism thin layer 380 can improve from the brightness of the light that disperses thin layer 370 ejaculations.

Polarization by reflection thin layer 390 is positioned on this prism thin layer 380.This polarization by reflection thin layer 390 can improve from the brightness of the light of prism thin layer 380 ejaculations.The optics thin layer of given number described above, those skilled in the art are to be understood that can use a variety of optics thin layers in the backlight assembly of these embodiment, perhaps do not use the optics thin layer.

Mold frame 430 in the middle of this backlight assembly 500 comprises one.This centre mold frame 430 and receiving vessel 320 combinations, thus this light dispersion member 105 can not moved with respect to receiving vessel 320 basically.Dull and stereotyped track segment 440 is set in the bight of this centre mold frame 430.The bight of the display board (not shown) in the middle of this flat board track segment 440 can be fixed and will be installed on the mold frame 430.Each dull and stereotyped track segment 440 all is L shaped.This flat board track segment 440 has elasticity, thereby can fix the bight of this display board effectively.

Fig. 8 is a sectional view, and the exemplary embodiment of backlight assembly of the present invention is shown.

Backlight assembly 600 among Fig. 8 is identical with shown in Fig. 1 basically, and distinctive points only is the fixed groove 122 of light dispersion member 105.Therefore, identical Reference numeral will be used for expression and the same or analogous part of Fig. 1, and will omit the description to these same sections.

With reference to Fig. 8, alternately form spine 134 and slot part 132 in the bottom surface section of light dispersion member 105.Therefore, if not by the help of fixed groove 122, the second surface 120 of this light dispersion member 105 will be difficult to backlight assembly 600 in an included part (not shown) be fixed together.Described will with the second surface 120 of fixed groove 122 engaging portion facing to the light dispersion member 105 of backlight assembly 600.

On the second surface 120 of the bottom surface section of light dispersion member 105, formed at least one fixed groove 122.This fixed groove 122 can make light dispersion member 105 be easy to be fixed together with the part of backlight assembly 600.This fixed groove 122 can be combined with the fixed lobe (not shown) that raises up from this part.Like this, this light dispersion member 105 just can be fastenedly connected with this part of backlight assembly 600.

Fig. 9 is a sectional view, shows the exemplary embodiment of backlight assembly of the present invention.

Basically with shown in Figure 1 identical, distinctive points is the fixed lobe 124 of light dispersion member 105 to backlight assembly 700 among Fig. 9.Therefore, identical Reference numeral will be used for expression and the same or analogous part of Fig. 1, and will omit the description to these same sections.

With reference to Fig. 9, alternately form spine 134 and slot part 132 in the bottom surface section of light dispersion member 105.Therefore, if not by the help of fixed lobe 124, the second surface 120 of this light dispersion member 105 will be difficult to backlight assembly 700 in an included part (not shown) be fixed together.Described will with the second surface 120 of fixed lobe 124 engaging portion facing to the bottom surface section of light dispersion member 105.

Convexed to form at least one fixed lobe 124 downwards from the second surface 120 of light dispersion member 105.The part that this fixed lobe 124 can make light dispersion member 105 be easy to comprise with backlight assembly 700 is fixed together.This fixed lobe 124 can be combined with the fixed groove (not shown) that forms on the upper surface portion of this part included in this backlight assembly 700.Like this, this light dispersion member 105 just can be fastenedly connected with this part of included ground in the backlight assembly 700.Therefore, this embodiment is similar to embodiment shown in Figure 8, and distinctive points only is that this part comprises fixed groove rather than fixed lobe, and the fixed groove 122 on the light dispersion member of utilizing fixed lobe 124 to replace to be arranged in Fig. 8 105.

Figure 10 is a sectional view, shows the exemplary embodiment of backlight assembly of the present invention.

Basically with shown in Figure 1 identical, difference only is to comprise the diffusion layer 140 of bonding agent 142 and astigmatic pearl 144 to backlight assembly 800 among Figure 10.Therefore, identical Reference numeral will be used for expression and the same or analogous part of Fig. 1, and will omit the description to these same sections.

With reference to Figure 10, this diffusion layer 140 is formed on the first surface 110 of astigmatism plate 105.This diffusion layer 140 comprises bonding agent 142 and astigmatic pearl 144.

This bonding agent 142 has first optical index.This bonding agent 142 is fixed on astigmatic pearl 144 on the first surface 110 of light dispersion member 105.Bonding agent 142 comprises polyethylene terephthalate (" PET ").

Astigmatism pearl 144 has second optical index.This astigmatism pearl 144 is fixed on the first surface 110 of astigmatism plate 105 by bonding agent 142.This astigmatism pearl 144 is spherical, but other shapes are also contained among these embodiment.This astigmatism pearl 144 can comprise polymethylmethacrylate (" PMMA ").As shown in FIG., utilize bonding agent 142 a plurality of astigmatic pearls 144 can be fixed on the first surface 110 of astigmatism plate 105.

The light that penetrates from the first surface 110 of light dispersion member 105 is incident on the diffusion layer 140 that comprises bonding agent 142 and astigmatic pearl 144.This light is disperseed on this comprises the diffusion layer 140 of bonding agent 142 and astigmatic pearl 144 then.Like this, just can improve brightness and brightness uniformity.

Figure 11 is a sectional view, shows the one exemplary embodiment of display device of the present invention.Figure 12 is the decomposition diagram of the exemplary display device among Figure 11.

With reference to Figure 11, display device 1000 comprises backlight assembly 900 and display board 800.

This backlight assembly 900 comprises light dispersion member 910 and light source 920.This light source 920 provides light to light dispersion member 910.

Light dispersion member 910 is positioned on the light source 920.This light dispersion member 910 is used for the light that divergent light source 920 penetrates.This light dispersion member 910 comprises first surface 911 and second surface 912.The light that sends from light source 920 is incident on the second surface 912 of light dispersion member 910.This light penetrates from the first surface 911 of light dispersion member 910 then.This first surface 911 is relative with second surface 912.Second surface 912 is facing to light source 920.

The first surface 911 of light dispersion member 910 is smooth basically, for example has plane surface.On the other hand, formed at least one slot part 913 and at least one spine 914 in the bottom of this light dispersion member 910, so the second surface 912 of this light dispersion member 910 is uneven substantially, it has a non-planar surfaces.Spine 914 and slot part 913 are alternately to form on the second surface 912 of the bottom of light dispersion member 910.That is, this slot part 913 is connected between two spines 914 adjacent one another are.Similarly, this spine 914 is connected between two slot parts 913 adjacent one another are.This spine 914 is the semi-circular cylindrical shape, for example circular arc or shaped form, but other shapes should be also in the scope of these embodiment.

Because second surface 912 unevennesses of light dispersion member 910, therefore can improve the brightness and the brightness uniformity of the light that penetrates from the first surface 912 of light dispersion member 910.

The first curvature radius of slot part 913 is R1.This first curvature radius R1 can be that about 0.5mm is between about 1mm.

Be connected two spines 914 between the slot part adjacent one another are 913 and have second curvature radius R2.This second curvature radius R2 can be between about 0.5mm and the about 1mm.

For effectively raising need accurate control first thickness T 1 and second thickness T 2 from the brightness and the brightness uniformity of the light of first surface 911 ejaculations of light dispersion member 910.This first thickness T 1 is the thickness that measures at the first place of this light dispersion member 910, wherein forms slot part 913 at this first place.And second thickness T 2 is the thickness that measures at the second portion place of this light dispersion member 910, wherein forms spine 914 at this second portion place.In other words, this first and second thickness T 1 and T2 are the distances that the some vertical survey on from this first surface 911 to second surface 912 obtains, the thinnest corresponding first thickness T 1 of part of light dispersion member 910 wherein, corresponding second thickness T 2 of the thickest part.

In order to improve the brightness and the brightness uniformity of the light that penetrates from the first surface 911 of light dispersion member 910, second thickness T 2 can be about 1.15 times to 1.80 times of first thickness T 1.In another example, second thickness T 2 is about 1.15 times to 1.35 times of first thickness T 1.In another example, second thickness T 2 is about 1.35 times to 1.67 times of first thickness T 1.In another example, second thickness T 2 is about 1.5 times to 1.67 times of first thickness T 1.In another example, second thickness T 2 is about 1.67 times to 1.75 times of first thickness T 1.In another example, second thickness T 2 is about 1.67 times of first thickness T 1.With reference to the description of Fig. 4, the variation between thickness T 2 and the T1 will have influence on the brightness of backlight assembly according to above.

In addition, in order to improve the brightness and the brightness uniformity of the light that penetrates from the first surface 911 of light dispersion member 910, first between the central shaft of spine 914 and light source 920 A1 at interval can be about 0.2 times to 0.55 times of distance D.Here, distance D is meant the horizontal survey distance between two light sources 920 adjacent one another are.This first A1 about 0.2 times to about 0.55 times of distance D preferably at interval.Particularly, this first at interval A1 be about 0.286 times to about 0.51 times of distance D.

In some exemplary embodiments of backlight assembly 900, the first interval A1 approximately can be that 7.0mm is to 12.5mm.Distance D between two light sources 920 adjacent one another are approximately can be that 3.75mm is to 43.7mm.

In addition, in order to improve the brightness and the brightness uniformity of the light that penetrates from the first surface 911 of light dispersion member 910, second at interval A2 can be about 0.10 times to 0.25 times of distance D.Here, the second interval A2 is meant the central shaft of light source 920 and the vertical survey distance between the reflecting plate 960 below this light source 920.This second A2 about 0.139 times to about 0.212 times of distance D preferably at interval.

Say that more specifically this second interval A2 is approximately 3.1mm to 5.4mm.

This light source 920 can be U-shaped or C shape.This light source 920 can be outside internal electrode fluorescent light (" EIEFL "), or external electrode fluorescent lamp (" EEFL ").

Each lamp in the light source 920 all just in time is positioned at the below of one of them spine 914 of light dispersion member 910.

This display board 800 is facing to the first surface 911 of light dispersion member 910.Display board 800 utilizes the light display image that penetrates from the first surface 911 of light dispersion member 910.

With reference to Figure 12, this light dispersion member 910 and light source are contained in the receiving vessel 930.

This receiving vessel 930 comprises base plate 931 and sidewall 932.This base plate 931 is generally rectangle, but other shapes are also in the protection domain of these embodiment.This sidewall 932 extends upward from the periphery of base plate 931.This base plate 931 and sidewall 932 define the reception recess together, and this reception recess can hold light dispersion member 910 and light source 920.

This backlight assembly 900 also comprises phase inverter 940.This phase inverter 940 is positioned at the below of lower surface of the base plate 931 of receiving vessel 930.Phase inverter 940 can provide the driving energy to light source 920, thereby makes light source 920 produce light.

Receiving vessel 930 also comprises shielding case 950, and this shielding case 950 covers this phase inverter 940.Shielding case 950 can stop harmful microwave that phase inverter 940 is produced.This shielding case 950 can combine with the base plate 931 of receiving vessel 930.

Light source supporter 970 is fixed together light source 920 and receiving vessel 930.Perhaps, this light source supporter 970 can be fixed together light source 920 and reflecting plate 960, and this reflecting plate 960 is fixed together with receiving vessel 930.

The mold frame 980 of end that is covered with light source 920 is between the end and light dispersion member 910 of light source 920.This mold frame 980 can support level light dispersion member 910 thereon.

On the sidewall sections of light dispersion member 910, formed combination groove 910a.Raise up from this mold frame 980 and to form combination projection 982.The combination groove 910a of this light dispersion member 910 is corresponding to the combination projection 982 of mold frame 980.The combination groove 910a of this light dispersion member 910 can combine with the combination projection 982 of mold frame 980, thereby this light dispersion member 910 can not moved with respect to mold frame 980 basically.

Alternatively, this light dispersion member 910 can have from the combination projection (not shown) of its sidewall sections to lower convexity.In this alternative embodiment, mold frame 980 comprises the combined combination groove of this combination projection with light dispersion member 910.

Disperse thin layer 990 can be positioned on the light dispersion member 910.The light that this dispersion thin layer 990 can penetrate the first surface 911 from light dispersion member 910 spreads out.Prism thin layer 992 is positioned on this dispersion thin layer 990.This prism thin layer 992 can improve from the brightness of the light that disperses thin layer 990 ejaculations.Polarization by reflection thin layer 994 is positioned on this prism thin layer 992.This polarization by reflection thin layer 994 can improve from the brightness of the light of prism thin layer 992 ejaculations.Though the multiple optics thin layer of given number described above, those skilled in the art are to be understood that the optics thin layer that can use other number or type in this backlight assembly 900.

Raise up and formed auxiliary projection 982a from making up projection 982.This auxiliary projection 982a can fix and disperse thin layer 990, prism thin layer 992 and polarization by reflection thin layer 994.Each all comprises the groove that is used to receive auxiliary projection 982a this dispersion thin layer 990, prism thin layer 992 and polarization by reflection thin layer 994.

Mold frame 996 in the middle of this backlight assembly 900 comprises.This centre mold frame 996 and receiving vessel 930 combinations, thus this light dispersion member 910 can not moved with respect to receiving vessel 930 basically.On this centre mold frame 996, form dull and stereotyped track segment 998.This flat board track segment 998 is the bight of display board 800 fixedly.Therefore each dull and stereotyped track segment 998 all is flexible, should flat board track segment 998 can fix the bight of this display board 800 effectively.

This display board 800 is positioned on the middle mold frame 996.Utilize dull and stereotyped track segment 998 this display board 800 can be fixed together with this centre mold frame 996 and relevant with backlight assembly 900.

This display board 800 can comprise thin film transistor (TFT) (" TFT ") substrate 810, color filter substrate 820 and liquid crystal (" LC ") layer 830.

This TFT substrate 810 comprises pixel electrode (not shown) and TFT (not shown).These pixel electrodes are arranged as rectangular shape.This TFT is electrically connected with pixel electrode, thereby TFT can provide driving voltage to pixel electrode.Pixel electrode can comprise indium oxide (" ITO "), indium zinc oxide (" IZO ") or noncrystal tin oxide (" a-ITO ").These materials can use or mix use separately.

Color filter substrate 820 is facing to TFT substrate 810.This color filter substrate 820 comprises the public electrode (not shown) facing to pixel electrode.This public electrode can be covered with color filter substrate 820 continuously.This public electrode comprises ITO, IZO or a-ITO.These materials can be used alone or as a mixture.

LC layer 830 is between TFT substrate 810 and color filter substrate 820.This LC layer 830 comprises LC molecule (not shown), and these molecules are arranged according to the electric field that is applied on it.Under the situation of the permutations of LC molecule, the light transmission of LC layer 830 also can change.

Figure 13 is a decomposition diagram, shows the exemplary embodiment of backlight assembly of the present invention.

Backlight assembly 1070 is direct illumination type backlight assembly, and it has the light source 1076 that extends along first direction.This light source 1076 is parallel to each other basically.Has predetermined space between the light source 1076 each other.Backlight assembly 1070 can be used for giant-screen LCD equipment, for example among the LCD TV.

Backlight assembly 1070 comprises the molded side 1078 of non-flat forms dispersion plate 1074, light source 1076 and framework.This non-flat forms dispersion plate 1074 can disperse to launch this light to third direction then from the light of light source 1076 ejaculations.Under(-)chassis 1075 is positioned at the bottom of backlight assembly 1070.This under(-)chassis 1075 is used to hold light source 1076, light source supporter 1077 (seeing Figure 17), the molded side 1078 of framework and reflecting surface thin layer 1079.Mold frame 1071 is positioned at the top of backlight assembly 1070.This mold frame 1071 is combined with this under(-)chassis 1075.

As shown in figure 13, light source 1076 is the such lamp of CCFL for example.But clearly, light source 1076 also can have a lot of variations.For example, light source 1076 can be light emitting diode (" LED ").

Utilize light source supporter 1077 (Figure 17), the light source 1076 that produces light can be fixed together with under(-)chassis 1075.Reflecting surface thin layer 1079 is between light source 1076 and under(-)chassis 1075.This reflecting surface thin layer 1079 can be with the light of incident on it to 1074 reflections of non-flat forms dispersion plate.When the light of light source 1076 generations passes this non-flat forms dispersion plate 1074, this light is disperseed.Like this, just can improve from the brightness of the light of non-flat forms dispersion plate 1074 ejaculations.

As mentioned above, light source 1076 can be CCFL.Alternatively, this light source 1076 can be EEFL.Light source supporter 1077 (Figure 17) has covered an end of light source 1076.This light source 1076 can be fixed together with light source supporter 1077.The molded side 1078 of framework can cover light source supporter 1077, thereby light source supporter 1077 and the molded side 1078 of framework are fixed together.Can place phase inverter 1073 below the under(-)chassis 1075.This phase inverter 1073 can be printed circuit board (PCB) (" PCB ") type.This phase inverter 1073 can provide the external energy with predetermined voltage level to light source 1076.This external energy can make light source 1076 produce light.Electric wire 1761 and coupled socket 1763 (Figure 14) can make power supply 1076 be electrically connected with phase inverter 1073

Has recessed (zigzag) part 7411 on the sidewall of non-flat forms dispersion plate 1074.This recessed portion 7411 combines with protrusion (projection) part 1781 of the molded side 1078 of framework.Non-flat forms dispersion plate 1074 can comprise PMMA.This preliminary non-flat forms dispersion plate is handled by for example injection molding and is formed.Thereby then this preliminary non-flat forms dispersion plate is carried out cutting process and form the non-flat forms dispersion plate 1074 that sidewall has recessed portion 7411.The shape of this recessed portion 7411 and position can have various remarkable to change.

As shown in figure 14, the number of recessed portion is two.But the number of this recessed portion 7411 also can change.For example, the relative side of the non-flat forms dispersion plate 1074 that supported of the molded side 1078 of this framework comprises more than one recessed portion 7411 respectively.

Alternatively, this non-flat forms dispersion plate 1074 has the projection (not shown).This projection can combine with the recessed portion (not shown) of the molded side 1078 of framework.

As shown in figure 13, the molded side 1078 of this framework receives non-flat forms dispersion plate 1074.But under(-)chassis 1075 also can substitute the molded side 1078 of framework and receive this non-flat forms dispersion plate.

At least one optical thin film 1072 is installed on this non-flat forms dispersion plate 1074.Has fixed part 1721 on the sidewall of these optical thin films 1072.Each fixed part 1721 can combine with lug boss 1783.This lug boss 1783 raises up from the molded side 1078 of framework.Alternatively, this lug boss is to raise up from under(-)chassis 1075 rather than from the molded side 1078 of framework.

Figure 14 is a partial, exploded perspective view, and the rear portion of exemplary backlight assembly among Figure 13 is shown.For for simplicity, optical thin film 1072 shown in Figure 13 and mold frame 1071 are not shown in Figure 14.

On the lower surface part of non-flat forms dispersion plate 1074, formed and had a plurality of spines that are positioned at spine's part 1743.The lower surface of this non-flat forms dispersion plate 1074 is facing to light source 1076 (Figure 13).The first direction that a plurality of spines in spine's part 1743 extend along light source 1076 and extending.A plurality of spines in this spine's part 1743 are direct corresponding light source 1076 respectively, thereby can suppress the bright band of light source 1076.Therefore, can improve from the brightness and the brightness uniformity of the light of non-flat forms dispersion plate 1074 ejaculations.

The contact portion 1741 of non-flat forms dispersion plate 1074 is supported on the molded side 1078 of framework and substantially flat, for example is plane or have plane surface substantially.This contact portion 1741 is extended along the second direction vertical with first direction.Contact portion 1741 is positioned at the side of non-flat forms dispersion plate 1074 all on the part.Because contact portion 1741 is essentially the plane, so contact portion 1741 can be supported on the molded side 1078 of framework effectively.

Figure 15 is a skeleton view, shows the exemplary non-flat forms dispersion plate shown in Figure 14 and the combination of exemplary base framework.

With reference to Figure 15, the molded side 1078 of framework holds non-flat forms dispersion plate 1074.The molded side 1078 of this framework extends along the second direction at the lateral section place of non-flat forms dispersion plate 1074.The light source 1076 that is contained in the backlight assembly 1070 extends along basic vertical with second direction first direction.

Figure 16 illustrates the enlarged drawing of the part " A " among Figure 15.

With reference to Figure 16, the molded side of this non-flat forms dispersion plate 1074 and framework 1078 is separated from one another.In detail, have first clearance G 1, second clearance G 2 and third space G3 between the recessed portion 7411 of the projection 1781 of the molded side 1078 of framework and non-flat forms dispersion plate 1074.

Wherein, first clearance G 1, second clearance G 2 and third space G3 consider the thermal expansion of non-flat forms dispersion plate 1074 and definite.In addition, first clearance G 1, second clearance G 2 and third space G3 also need to consider the effective combination between non-flat forms dispersion plate 1074 and the molded side 1078 of framework.

Particularly, have first clearance G 1 and second clearance G 2 between the molded side 1078 of non-flat forms dispersion plate 1074 and framework along second direction.First clearance G 1 and second clearance G 2 all are no more than 0.5mm respectively.This is that the molded side 1078 of non-flat forms dispersion plate 1074 and framework can effectively be combined because all be no more than respectively under the condition of 0.5mm in first clearance G 1 and second clearance G 2.On the other hand, if first clearance G 1 and second clearance G 2 all above 0.5mm, then non-flat forms dispersion plate 1074 just may move.

In this first clearance G 1 and second clearance G 2 at least one preferably is less than or equal to about 0.1mm.Because backlight assembly 1070 normally uses under vertical substantially state, so the bossing 1781 of the molded side 1078 of framework can support the recessed portion 7411 of non-flat forms dispersion plate 1074.When backlight assembly 1070 is set to plumbness, in first clearance G 1 and second clearance G 2 at least one is no more than under the condition about 0.1mm, and the bossing 1781 of the molded side 1078 of framework can effectively support the recessed portion 7411 of non-flat forms dispersion plate 1074.

In addition, there is third space G3 between the molded side 1078 of non-flat forms dispersion plate 1074 and framework along first direction.

This third space G3 can be to about 3.2mm from about 1.6mm.When third space is about 1.6mm during to 3.2mm, the molded side 1078 of framework can be effectively and 1074 combinations of non-flat forms dispersion plate, no matter and the thermal expansion of this non-flat forms dispersion plate 1074 how.The thermal expansion of this non-flat forms dispersion plate 1074 is to cause owing to heat that light source 1076 is produced.

If third space G3 is not more than 1.6mm, then will contact with non-flat forms dispersion plate 1074 and exert pressure, so the thermal expansion of this non-flat forms dispersion plate 1074 will cause 1074 distortion of non-flat forms dispersion plate to this non-flat forms dispersion plate 1074 owing to the molded side 1078 of framework.

If third space G3 is greater than 3.2mm, then non-flat forms dispersion plate 1074 will move.

Figure 17 is the sectional view along II-II ' line among Figure 15.

With reference to Figure 17, non-flat forms dispersion plate 1074 comprises contact portion 1741 and spine's part 1743.The lower surface of this contact portion 1741 is smooth basically, for example is the plane as shown in the figure substantially.This contact portion 1741 comprises the first contact portion 1741a and the second contact portion 1741b.The molded side 1078 of framework can the support level first contact portion 1741a thereon.The molded side 1078 of framework can comprise the surface parallel with the lower surface of contact portion 1741.And the molded side 1078 of framework can comprise a step and the wall that forms between the surface of this step and support contact portion 1741.The edge contact of this wall and non-flat forms dispersion plate 1074 prevents that perhaps this non-flat forms dispersion plate 1074 from moving between the molded side 1078 of pair of frames.The first contact portion 1741a and the second contact portion 1741b are connected to each other.Between the spine of this second contact portion 1741b in the first contact portion 1741a and spine's part 1743, even thereby when non-flat forms dispersion plate 1074 moves, the molded side 1078 of this framework is not contacted or only can contact this spine's part 1743 reluctantly.Like this, the molded side 1078 of framework just can support non-flat forms dispersion plate 1074 effectively.

The width that the second contact portion 1741b measures on first direction can be not more than 1.0mm.If the second contact portion 1741b is greater than 1.0mm, the length of the spine's part 1743 that then measures on first direction should shorten.Like this, the dispersion coefficient of this non-flat forms dispersion plate 1074 just can not reduce.

According to foregoing, the width of the second contact portion 1741b preferably is not more than 1.0mm.Like this, non-flat forms dispersion plate 1074 just has higher relatively dispersion coefficient.In addition, the molded side 1078 of framework can effectively support non-flat forms dispersion plate 1074 under the help of the second contact portion 1741b, thereby can improve the intensity of backlight assembly 1070.

Figure 18 is a decomposition diagram, and the exemplary embodiment of backlight assembly of the present invention is shown.In this embodiment, the molded side 1088 of framework has the non-planar surface 1881 that is used to receive this non-flat forms dispersion plate 1084.

Backlight assembly 1080 among Figure 18 is identical with shown in Figure 13 basically, and difference is non-flat forms dispersion plate 1084 and the molded side 1088 of framework.Therefore, with use identical Reference numeral represent with Figure 13 in the same or similar part explained, and the explanation of omitting repeatability.

With reference to Figure 18, a plurality of spines 1841 under the whole bottom surface section of non-flat forms dispersion plate 1084, have been formed.That is, the whole bottom surface section of this non-flat forms dispersion plate 1084, all covered facing to the whole bottom surface section of light source 1076 and the molded side 1088 of framework by spine 1841.These spines 1841 extend along first direction, and light source 1076 also extends at equidirectional.Be positioned at the molded side 1088 of framework under the non-flat forms dispersion plate 1084 and have non-flat forms upper surface facing to spine 1841 ends.Like this, this non-flat forms dispersion plate 1084 just can be received effectively and be fastened on the non-planar surface 1881 of the molded side 1088 of framework.Like this, just can not produce bright band.

As shown in figure 18, the molded side 1088 of this framework receives this non-flat forms dispersion plate 1084.Perhaps, this non-flat forms dispersion plate 1084 can be on the under(-)chassis 1075, and this under(-)chassis 1075 has the upper face of non-flat forms, and the end of spine 1841 is positioned on this non-flat forms upper face.In addition alternatively, non-flat forms dispersion plate 1084 can be accommodated on a part of (not shown) of backlight assembly 1080, and this part has the non-flat forms upper surface, and the end of spine 1841 is positioned on this non-flat forms upper surface.This part is facing to non-flat forms dispersion plate 1084.

Figure 19 is the skeleton view of the exemplary backlight assembly among Figure 18.Figure 20 is the cross section enlarged drawing of the line III-III ' in Figure 19.

With reference to Figure 19 and 20, spine 1841 just in time is positioned at light source 1076 tops, thereby can suppress the bright band that this light source 1076 is produced.

In addition, the spine 1841 of this non-flat forms dispersion plate 1084 can closely combine with the non-planar surface 1881 of the molded side 1088 of framework, thereby makes the molded side 1088 of these non-flat forms dispersion plate 1084 relative frameworks closely fixing.Owing to non-flat forms dispersion plate 1084 can not move with respect to the molded side 1088 of framework basically, then can suppress the bright band that causes owing to the alignment error between non-flat forms dispersion plate 1084 and the light source 1076.

Figure 21 is a decomposition diagram, and the flat panel display equipment with the exemplary backlight assembly of the present invention is shown.This flat panel display equipment comprise the LCD plate and with it as flat display panel.

As shown in figure 21, flat panel display equipment 1100 comprises the LCD plate 1050 as flat display panel.But this flat display panel also has a variety of variations.For example, flat display panel can be non-emission type flat display panel.

Part covers the top frame 1060 and backlight assembly 1070 combinations of this LCD plate 1050, thereby produces flat panel display equipment 1100.

This LCD board component 1040 comprises LCD plate 1050, first driver IC (" IC ") assembly 1043, the second driver IC assembly 1044, first printed panel (" PCB ") the 1041 and the 2nd PCB 1042.This first and second driver ICs assembly 1043 is connected with LCD plate 1050 with 1044, thereby provides drive signal to the LCD plate.This first and second

driver ICs assembly

1043 and 1044 can be chip on the film (" COF ") or tape carrier assembly (" TCP ").This first and

second PCB

1041 and 1042 can place on the inner lateral surfaces of top frame 1060.

This LCD plate 1050 comprises thin film transistor (TFT) (" TFT ") substrate 1051, color filter substrate 1053 and LC layer (not shown).This TFT substrate 1051 has a plurality of TFT.Color filter substrate 1053 is positioned on this TFT substrate 1051.This LC layer is between TFT substrate 1051 and color filter substrate 1053.

The polarization plates (not shown) can be positioned on the color filter substrate 1053 and under the TFT substrate 1051, thereby the light that passes LCD panel 1050 is disperseed.This polarization plates is regulated the transmission direction of injecting the light of TFT substrate 1051 and color filter substrate 1053 from the outside according to the orientation of LC layer.This polarization plates has the first and second orthogonal polarization axles.

This TFT substrate 1051 is for having the transparent glass substrate of a plurality of TFT, and these TFT are arranged as rectangle.This TFT substrate 1051 comprises a plurality of gate lines and a plurality of data line, and they are intersected with each other on TFT substrate 1051, wherein the bearing of trend quadrature of the bearing of trend of data line and gate line.The source terminal of TFT is connected with data line.The grid terminal of TFT is connected with gate line.On the drain terminal of TFT, formed pixel electrode.This pixel electrode can comprise transparent conductive material.This transparent conductive material can be, but be not limited to tin indium oxide (" ITO ").

When first and

second PCB

1041 and 1042 when gate line and data line provide electric signal, this electric signal should be provided to grid terminal and source terminal.The electric signal that is provided to grid terminal and source terminal can be used for making TFT conducting or cut-out, thereby can be provided for controlling the electric signal of the voltage that is provided to the LC layer to drain terminal.

Color filter substrate 1053 is positioned on the TFT substrate 1051.This color filter substrate 1053 has at least one colour element parts, and each colour element parts comprises red pixel part, green pixel part and blue pixel part.When light saw through these colour element parts, the color of light will change.Utilize film to handle and in color filter substrate, to form this colour element parts.The front surface of this color filter substrate 1053 is covered by public electrode, and this public electrode comprises transparent conductive material, such as, but be not limited to ITO.When this TFT conducting, produced electric field between pixel electrode and the public electrode.This electric field can change the arrangement of LC molecule included in the LC layer, thereby can change the transmittance of this LC layer.Like this, utilize the variation of the transmittance of light, LCD plate 1050 just can show the image of needs.

First and second PCB 1041 are connected with 1044 with the first and second driver IC assemblies 1043 respectively with 1042.This first and

second PCB

1041 and 1042 can receive external image signal, provides this drive signal to gate line and data line then.Can produce grid and data drive signal respectively in order to operate this flat panel display equipment 1100, the first and second PCB 1041 and 1042.In addition, first and second printed circuit board (PCB)s 1041 and 1042 produce a plurality of clock signals, and these clock signals can provide gate drive signal and data drive signal to gate line and data line in the sequential of needs.Gate drive signal and data drive signal are provided to gate line and data line by the first driver IC assembly 1043 and the second driver IC assembly 1044 respectively.This first driver IC assembly 1043 and the second driver IC assembly 1044 comprise first integrated chip 1431 and second integrated chip 1441 respectively.The control panel (not shown) is positioned at the below of backlight assembly 1070.This control panel is connected with the 2nd PCB 1042, thereby analog data signal is converted to digital data signal.Control panel provides digital data signal to LCD plate 1050 then.

Top frame 1060 is positioned on the LCD board component 1040.This top frame 1060 can be folding to the side surface of backlight assembly 1070 with an IC assembly 1043 and the 2nd IC assembly 1044.In addition, top frame 1060 can prevent that LCD board component 1040 from separating with backlight assembly 1070 easily.

Though do not illustrate especially in Figure 21, front surface housing and rear surface housing lay respectively on the top frame 1060 and under(-)chassis 1075 (Figure 13) below.This front surface housing and rear surface housing can combinations with one another, thereby make flat panel display equipment 1100.

According to top description, the backlight assembly with non-flat forms dispersion plate can provide to LCD plate 1050 has higher brightness and the inhomogeneity light of higher brightness.Therefore, this flat panel display equipment 1100 display image effectively.

Figure 22 illustrates the skeleton view of the exemplary embodiment of backlight assembly of the present invention.Figure 23 illustrates along the sectional view of the IV-IV ' line of Figure 22.

With reference to Figure 22 and 23, this backlight assembly 2000 comprises light source 1140, phase inverter 1150, receiving vessel 1200, first optics 1300, second optics 1400, optics thin parts 1500, first fixed part 1600 and second fixed part 1650.

Light source 1140 can be the surface source of light that produces planar light.This light source 1140 comprises body and outer electrode 1130.This body has a plurality of discharge spaces 1122.This outer electrode 1130 can cover the end of body.This body comprises first substrate 1110 and second substrate 1120.Thereby this first substrate 1110 and second substrate, 1120 combinations with one another limit the discharge space between them together.The width of this discharge space 1122 is approximately 14.15mm.This width measures on second direction.In addition, discharge space 1122 connects by connecting pipe 1124 each other, and these connecting pipes 1124 are included in second substrate 1120.

This first substrate 1110 is the quadrangular plate shapes with predetermined thickness.This first substrate 1110 is including, but not limited to glass.First substrate 1110 comprises can stop the ultraviolet material that produces from discharge space 1122.Therefore, this first substrate 1110 can shielding of ultraviolet.

Second substrate 1120 can comprise transparent material, and the luminous ray that produces from discharge space 1122 just can penetrate second substrate 1120 like this.For example, second substrate 1120 can be including, but not limited to glass.This second substrate 1120 comprises can stop the ultraviolet material that produces from discharge space 1122.Therefore, this second substrate 1120 can shielding of ultraviolet.

Second substrate 1120 comprises discharge space part 1120a, separated by spaces part 1120b and hermetic unit 1120c.This discharge space part 1120a and first substrate 1110 are separated from one another, thereby limit discharge space 1122 between the discharge space part 1120a and first substrate 1110.Separated by spaces part 1120b is between discharge space part 1120a adjacent one another are.In addition, separated by spaces part 1120b can contact first substrate 1110.Hermetic unit 1120c is positioned at the edge of second substrate 1120.Sealing part 1120c closely contacts with first substrate 1110, thereby seals this discharge space 1122.

As shown in figure 23, discharge space part 1120a arranges along second direction.Separated by spaces part 1120b is connected between the discharge space part 1120a adjacent one another are.

In addition, as shown in figure 23, the longitudinal component of discharge space part 1120a has bowed shape.But this longitudinal component also has a variety of variations.For example, the longitudinal component of discharge space part 1120 can have semi-circular shape, quadrangle form, trapezoidal shape etc.

For example carrying out, processed molding such as injection molding processing and extrusion molding processing forms second substrate 1120.

This connecting pipe 1124 and second substrate 1120 form simultaneously.That is, connecting pipe 1124 is integrally formed with this second substrate 1120.Can extract air in the discharge space 1122 out by this connecting pipe 1124, perhaps to wherein importing air.In addition, also can extract discharge gas in the discharge space 1122 out by this connecting pipe 1124, perhaps to wherein importing discharge gas.Gas between the adjacent space 1122 can flow by the connecting pipe between described adjacent space 1,122 1124.

Body comprises reflection horizon (not shown), the first fluorescence coating (not shown) and the second fluorescence coating (not shown).The reflection horizon is to form on the upper surface of first substrate 1110, and the upper surface of this first substrate 1110 is facing to the lower surface of second substrate 1120.This first fluorescence coating is formed on the reflection horizon.This second fluorescence coating is formed under the lower surface of second substrate 1120, and the lower surface of this second substrate is facing to the reflection horizon.Therefore, second fluorescence coating is facing to first fluorescence coating.

The reflection horizon is reflected the visible light that first and second fluorescence coatings produce to first optics 1300, thereby visible light can not leaked from first substrate 1110 basically.

Utilization is incident on the ultraviolet ray on this first and second fluorescence coating, can produce visible light.This ultraviolet ray is to produce by the plasma discharge in discharge space 1122.

Outer electrode 1130 extends along second direction on second substrate 1120, and is positioned under first substrate 1110.This outer electrode 1130 is corresponding with the end of discharge space 1122, and this outer electrode 1130 will be local overlapping with discharge space 1122 like this.Outer electrode 1130 can comprise conductive material, and so just the sparking voltage that phase inverter 1150 can be applied on the outer electrode 1130 is delivered to discharge space 1122 effectively, because this discharge space and outer electrode 1130 are local overlapping.

Phase inverter 1150 can produce the sparking voltage that is used to produce plasma discharge.When applying relatively low alternating voltage on phase inverter 1150, this phase inverter can be converted to the higher relatively alternating voltage that can be used as sparking voltage by the alternating voltage that this is relatively low.This phase inverter 1150 be positioned at receiving vessel 1200 below.The sparking voltage that phase inverter 1150 is produced can be applied on the outer electrode 1130 of light source 1140 by electric connection line 1152.

Receiving vessel 1200 can comprise bottom surface portions 1210 and lateral parts 1220.This lateral parts 1220 extends out from the edge of base section 1210.Base section 1210 and lateral parts 1220 define the reception recess that is used to hold light source 1140 together.The lateral parts 1120 of this receiving vessel 1200 should have the U-shaped of counter-rotating.This receiving vessel 1200 can comprise the metal that has than hard intensity.

First optics 1300 is positioned at light source 1140 tops.Particularly, in one exemplary embodiment, first optics 1300 and light source 1140 at interval about 13mm on third direction, this third direction is substantially perpendicular to the planar light emitting surface of backlight assembly 2000.The light that light source 1140 is produced is incident on first optics 1300.This first optics 1300 can disperse this light, thereby can improve brightness uniformity.This first optics 1300 comprises the transparent material with relative higher light transmittance.Therefore, the transmittance of first optics 1300 approximately can be less than 90%.

The amount that is incident on the light on first optics 1300 can change according to the position of the discharge space 1122 of light source 1140.

Therefore, the first of the optics 1300 just second portion than optics 1300 is thinner, and this first is positioned on the separated by spaces part 1120, and second portion is positioned on the discharge space 1122 of light source 1140.

The bottom surface section of first optics 1300 comprises a plurality of spines 1310 and a plurality of slot part 1320, thereby makes the lower surface of this first optics 1300 have bellows-shaped.This lower surface is that first optics 1300 of bellows-shaped can form by processed molding, and for example injection molding is handled and extrusion molding is handled.In detail, the spine 1310 of this first optics 1300 is corresponding to the discharge space 1122 of light source 1100.That is, each spine 1310 of first optics 1300 just in time is positioned at respectively on each the discharge space part 1120a with bowed shape.

In an exemplary embodiment, first thickness of the first of first optics 1300 is approximately 2.0mm, and the first that wherein forms slot part 1320 is meant the thinnest some place in first optics 1300.Second thickness of the second portion of first optics 1300 is approximately 2.9mm, and wherein this second portion is meant the thickest point position that forms spine 1310 places in first optics 1300.

The first curvature radius R1 of the first of first optics 1300 is approximately 14.12mm, and wherein this first is the position that forms slot part 1320.The second curvature radius R2 of the second portion of first optics 1300 is approximately 14.12mm equally, and wherein this second portion is the position that forms spine 1310.

Because the lower surface of first optics 1300 is a bellows-shaped, therefore the light that is incident on brokenly on first optics 1300 will penetrate equably from the upper surface of this first optics 1300.So just can improve brightness uniformity.In addition, the bellows-shaped of first optics 1300 can prevent that first optics 1300 from being fractureed easily under conditions such as external force, humidity and/or temperature.

Plasma discharge is to occur in the discharge space 1122 of light source 1140.This plasma discharge can produce ultraviolet ray, and described ultraviolet ray can make first and second fluorescence coatings produce visible light.These visible lights comprise the first visible light VR1, the second visible light VR2 and the 3rd visible light VR3.Be to be understood that this visible light VR1, VR2 and VR3 only are schematically, for the seldom part in the countless visible lights that only light source 1140 produced for simplicity is illustrated.

The first visible light VR1 penetrates with third direction from discharge space 1122, so this first visible light VR1 can directly be incident in the spine 1310 of first optics 1300 at third direction.The first visible light VR1 can penetrate the second portion of optics 1300 from third direction, and can not reflect, and wherein this second portion is the part that forms spine 1310.When the first visible light VR1 penetrated the second portion of optics 1300, because the second portion of this optics 1300 is thicker relatively, therefore the attenuation rate of first light intensity was relatively large.

The second visible light VR2 penetrates according to the direction with respect to base section 1210f horizontal tilt first angle of receiving vessel 1200 from discharge space 1122.This second visible light VR2 can be incident on the center section of first optics 1300, and this center section is between first and second portion.When the second visible light VR2 sees through first optics, the second visible light VR2 will be refracted.In addition, when the second visible light VR2 penetrated the center section of optics 1300, because center section is thicker than second portion, therefore the attenuation rate of second light intensity will be less than the first light intensity attenuation rate.

The 3rd visible light VR3 penetrates according to the direction with respect to base section 1210 horizontal tilts second angle from discharge space 1122.Wherein, this second angle is greater than first angle.The 3rd visible light VR3 can be incident in the first of first optics 1300, and this this first place has formed slot part 1320.When the 3rd visible light VR3 sees through first optics 1300, the 3rd visible light VR3 will be refracted.In addition, when the 3rd visible light VR3 penetrated the first of optics 1300, because first is all thinner than center section and second portion basically, therefore the attenuation rate of the 3rd light intensity will be basically less than second light and the first light intensity attenuation rate.

As mentioned above, the visible light that meeting refract light source 1140 is produced in first optics 1300.In addition, when visible light penetrated first optics 1300, visible light intensity can change.Like this, just can improve brightness uniformity.

As shown in figure 23, because the longitudinal cross-section of spine 1310 has semi-circular shape, so the lower surface of this first optics 1300 is a bellows-shaped.But the shape of this longitudinal cross-section can also have a lot of variations clearly, and all belongs in the scope of these embodiment.For example, the longitudinal cross-section of spine 1310 can be triangle, arc, trapezoidal etc.

Second optics 1400 is positioned on first optics 1300.This second optics 1400 can disperse the light that penetrates from first optics 1300, thereby improves brightness uniformity.This second optics 1400 can be the writing board shape with predetermined thickness.This second optics 1400 can comprise transparent material.The transparency of second optics 1400 is approximately 70% to 80%.This second optics 1400 can comprise PMMA.In addition, second optics 1400 can comprise the discrete part (not shown) that is used for dispersed light.

The 3rd optics 1500 is positioned on second optics 1400.The light that penetrates from second optics 1400 will be incident on the 3rd optics 1500.The 3rd optics 1500 can change the path of passing light wherein, thereby can improve brightness.The 3rd optics 1500 can comprise can make the light that is incident on the 3rd optics 1500 with the concentrated thin layer of third direction from 1500 ejaculations of the 3rd optics.Like this, just can improve the brightness of this light.In addition, the 3rd optics 1500 can comprise the dispersion thin layer that is used to disperse the light of incident on it.Above-described the 3rd optics 1500 has comprised specific a plurality of optics thin layers, but is to be understood that the number of these optics thin layers and the variation of type all will fall in the protection domain of these embodiment.

First fixed part 1600 is between the light source 1140 and first optics 1300.First fixed part, 1600 fixed light sources 1140.In addition, first fixed part 1600 can be supported on first optics 1300, second optics 1400 and the 3rd optics 1500 on its smooth support section.This first fixed part 1600 can be positioned on the light source 1140.In addition, first fixed part 1600 can make up with the lateral section of receiving vessel 1200.This first fixed part 1600 can partly cover the upper rim of light source 1140.As shown in figure 22, first fixed part 1600 has the as a whole frame shape of formation.But the shape of this first fixed part 1600 also has a lot of significant changes.For example, first fixed part 1600 can be divided into two parts, four parts etc.

Second fixed part 1650 is between the upper surface of the base section 1210 of light source 1140 and receiving vessel 1200, thereby this second fixed part 1650 can be supported on light source 1140 this base section 1210 tops.This second fixed part 1650 can the local edge that covers light source 1140.This second fixed part 1650 between the base section 1210 of light source 1140 and receiving vessel 1200, thereby light source 1140 and receiving vessel 1200 can be electrically insulated from each other.This second fixed part 1650 can comprise insulating material.

In addition, second fixed part 1650 has elasticity, thereby makes second fixed part 1650 can absorb external impact force.As shown in figure 22, this second fixed part 1650 can comprise first fixed part and second fixed part.This first fixed part and the second fixed part each interval come.Shapes such as that any one in first fixed part and second fixed part can comprise is L shaped, U-shaped.

The shape of second fixed part 1650 can have a variety of significant changes.For example, this second fixed part 1650 can be divided into four parts of each sidewall that is used to cover light source 1140.Another example is that this second fixed part 1650 can be divided into four parts in each bight that covers light source 1140.Also having another example is that this second fixed part 1650 forms as one.

Figure 24 A illustrates brightness to 24C to be changed.Particularly, the brightness of expressing the emitted light of exemplary light source from Figure 23 of the figure among Figure 24 A changes.The brightness that figure among Figure 24 B expresses the light of exemplary first optics ejaculation from Figure 23 changes.The brightness that figure among Figure 24 C expresses the light of exemplary second optics ejaculation from Figure 23 changes.

With reference to Figure 23 and 24A, the Luminance Distribution of the light that penetrates from light source 1140 will be according to changing significantly along the position of the second direction of light source 1140.

Particularly, the Luminance Distribution of the light that penetrates from light source 1140 will have the variation of the first bigger amplitude according to the position of the discharge space 1122 of light source 1140.That is, the brightness of the light that penetrates from discharge space 1122 is higher relatively.In addition, position between two discharge spaces 1122 adjacent one another are, i.e. the brightness of the light of separated by spaces part 1120b position ejaculation is relatively low.

With reference to Figure 23 and 24B, second amplitude that the Luminance Distribution of the light that penetrates from first optics 1300 changes according to the position of the discharge space 112 of light source 1140 is less than this first amplitude.

Particularly, the light that penetrates from light source 1140 will be incident on first optics 1300.This light is through first optics 1300 then.Second amplitude that the Luminance Distribution of the light that first optics 1300 penetrates changes according to the position of the discharge space 112 of light source 1140 is less than first amplitude.Therefore, compare with the previous light that sees through first optics 1300 shown in Figure 24 A, this brightness is more even.

With reference to Figure 23 and Figure 24 C, the amplitude of variation of the Luminance Distribution of the light that penetrates from second optics 1400 is the 3rd amplitude, greater than this second amplitude.

Particularly, the light that penetrates from light source 1140 will be incident on first optics 1300.This light is through first optics 1300.Then, the light that penetrates from first optics 1300 will be incident on second optics 1400.This light penetrates second optics 1400 then.The 3rd amplitude that the Luminance Distribution of the light that second optics 1400 penetrates changes is less than second amplitude.Shown in Figure 24 C, the 3rd amplitude is very little.In addition, the Luminance Distribution of the light that penetrates from second optics 1400 almost with the location independent of the discharge space 112 of light source 1140.

According to the present invention, first optics 1300 has irregular thickness, therefore the brightness that can improve light.

As shown in figure 23, backlight assembly comprises the surface source of light with a plurality of discharge spaces 1122.Perhaps, backlight assembly can utilize have bar-shaped cold-cathode fluorescence lamp (" CCFL "), external electrode fluorescent lamp (" EEFL "), light emitting diode (" LED ") to wait and replace this surface source of light 1140.

Figure 25 is a skeleton view, and the exemplary embodiment of display device of the present invention is shown.

Included backlight assembly identical with shown in Figure 23 basically in this display device.Therefore, identical Reference numeral will be used for being illustrated in the same or analogous part that Figure 23 has illustrated, and omit the explanation to repeating part.

With reference to Figure 25, display device 3000 comprises backlight assembly 2000, display board 1700, the 3rd fixed part 1800, the 4th fixed part 1900.

This display board 1700 is positioned on the backlight assembly 2000.This display board 1700 can utilize the light display image that penetrates from backlight assembly 2000.Display board 1700 comprises TFT substrate 1710, color filter substrate 1720, LC layer 1730, PCB 1740 and flexible PCB 1750.

TFT substrate 1710 comprises pixel electrode, TFT and signal wire.Signal electrode is arranged as rectangle.TFT provides driving voltage to pixel electrode.Signal wire is used to operate TFT.

Pixel electrode comprises transparent conductive material, such as, but be not limited to ITO, IZO, a-ITO etc.Pixel electrode can form such as, but be not limited to photoetch method by making the processing of integrated circuit.

Color filter substrate 1720 is relative with this TFT substrate 1710.This color filter substrate 1720 comprises public electrode and a plurality of color filter.Public electrode is positioned on the front surface of color filter substrate 1720.Color filter is relative with pixel electrode.

Color filter comprises red filter, green filter and blue filter.When white light is incident on the red filter, red filter will penetrate red light.When white light is incident on the green filter, green filter will penetrate green light.When white light is incident on the blue filter, blue filter will penetrate blue light.

LC layer 1730 is between TFT substrate 1710 and green substrate 1720.When applying electric field between pixel electrode and public electrode, the LC molecule that comprises in this LC layer 1730 will rearrange.Like this, the transmittance of LC layer will change, thereby display device 3000 can display image.

This PCB 1740 comprises the driving circuit that is used for external image signal is converted to the drive signal that is used to control TFT.This PCB 1740 comprises data PCB and grid PCB.The flexible PCB 1750 that is connected with data PCB can be crooked, thereby data PCB is on the side surface or rear surface of receiving vessel 1200.In addition, the flexible PCB 1750 that is connected with grid PCB can be crooked, thereby grid PCB is positioned on the side surface or rear surface of receiving vessel 1200.Signal wire also can be formed in TFT substrate 1710 and the flexible PCB 1750, rather than is formed among the grid PCB.

Flexible PCB 1750 can be electrically connected PCB 1740 with TFT substrate 1710, thereby the drive signal that PCB1740 produced is offered TFT substrate 1710.Flexible PCB 1750 can be a chip (" COF ") on strip-like carrier assembly (" TCP ") or the film.

The 3rd fixed part 1800 is between the 3rd optics 1500 and display board 1700.The 3rd fixed part 1800 can be fixed first optics 1300, second optics 1400 and the 3rd optics 1500.In addition, the 3rd fixed part 1800 can support display board 1700.As shown in figure 25, the 3rd fixed part 1800 is integrally formed parts.But the 3rd fixed part 1800 also can have a lot of other shapes.For example, the 3rd fixed part 1800 can comprise two, four or any other number part separated from one another.

The 4th fixed part 1900 gets up the border seal of display board 1700.The 4th fixed part 1900 makes up with the lateral section of receiving vessel 1200, thereby makes the top partial fixing of display board 1700 and backlight assembly 2000.

The display board 1700 that the 4th fixed part 1900 can prevent to have relatively low brightness is easy to be subjected to the damage of external impact or exterior vibration.In addition, the 4th fixed part 1900 can prevent that display board 1700 from too easily separating with receiving vessel 1200.

According to the present invention, the light dispersion member that is used for dispersed light has irregular thickness, so just can improve brightness and brightness uniformity.In addition, display device can show the image with higher image quality.

In addition, the exemplary embodiment of backlight assembly of the present invention does not comprise comparatively expensive double-deck brightness improvement film.Therefore, the cost of making this backlight assembly will be lower than and makes the required cost of backlight assembly with double-deck brightness improvement film.

Above-mentioned content all is to schematically illustrate of the present invention, and is not used in the present invention is limited.Though described exemplary embodiment more of the present invention, those skilled in the art should be easy under the situation that does not break away from instruction of the present invention and advantage these exemplary embodiments be carried out multiple variation.Therefore, all these change and all will be included in the scope of the present invention that claim limits.Therefore, should be appreciated that foregoing only is to explanation of the present invention, the present invention is not limited to described specific embodiment, all will fall in the scope of claim modification and other embodiment of the foregoing description.The present invention is limited by claim, and being equal to of these claims is also included within this scope.

Claims

1. backlight assembly comprises:

Light dispersion member, this light dispersion member comprises: have the bottom surface section of the slot part that extends along spine that first direction extends with along first direction, these spines and slot part are arranged alternately on this bottom surface section; With along the vertical direction of the described backlight assembly radiation surface relative with described bottom surface section; And

Light source, this light source has a plurality of light source parts, is limited with equal distance between the light source part adjacent one another are, and each light source part all vertically is positioned under each spine,

Wherein the center of first light source part be sitting at this first light source part on spine between vertically be at interval equate and be 0.2 to 0.55 times of described distance.

2. backlight assembly as claimed in claim 1, wherein first vertical thickness of the first of light dispersion member is 1.15 to 1.35 times of second vertical thickness of the second portion of light dispersion member, this first is the part that forms the thick of spine, and this second portion is the part that forms the thinnest part of slot part.

3. backlight assembly as claimed in claim 1, wherein first vertical thickness of the first of light dispersion member is 1.35 to 1.55 times of second vertical thickness of the second portion of light dispersion member, this first is positioned at the part of the thick that forms spine, and this second portion is positioned at the part of the thinnest part that forms slot part.

4. backlight assembly as claimed in claim 1, wherein first vertical thickness of the first of light dispersion member is 1.55 to 1.67 times of second vertical thickness of the second portion of light dispersion member, this first is the part that forms the thick of spine, and this second portion is the part that forms the thinnest part of slot part.

5. backlight assembly as claimed in claim 1, wherein first vertical thickness of the first of light dispersion member is 1.67 to 1.75 times of second vertical thickness of the second portion of light dispersion member, this first is the part that forms the thick of spine, and this second portion is the part that forms the thinnest part of slot part.

6. backlight assembly as claimed in claim 1, wherein first vertical thickness of the first of light dispersion member is 1.65 times of second vertical thickness of the second portion of light dispersion member, this first is the part that forms the thick of spine, and this second portion is the part that forms the thinnest part of slot part.

7. backlight assembly as claimed in claim 1, wherein first vertical thickness of the first of light dispersion member is 1.15 to 1.75 times of second vertical thickness of the second portion of light dispersion member, this first is the part that forms the thick of spine, and this second portion is the part that forms the thinnest part of slot part.

8. backlight assembly as claimed in claim 1, the thickness that wherein forms the each several part of slot part in the light dispersion member is that 1.5mm is to 2.0mm.

9. backlight assembly as claimed in claim 1, wherein each spine has semi-circular cross-section.

10. backlight assembly as claimed in claim 1, wherein light dispersion member comprises polymethylmethacrylate.

11. backlight assembly as claimed in claim 1, wherein light dispersion member comprises when light dispersion member is contained in the receiving vessel, is used to guide the combination of this light dispersion member recessed.

12. backlight assembly as claimed in claim 1, wherein light dispersion member comprises when light dispersion member is contained in the receiving vessel, is used to guide the combination projection of this light dispersion member.

13. backlight assembly as claimed in claim 1, wherein the radius-of-curvature of each spine is that 0.5mm is to 1mm.

14. backlight assembly as claimed in claim 1, wherein the radius-of-curvature of each slot part is that 0.5mm is to 1mm.

15. backlight assembly as claimed in claim 1 also comprises the diffusion layer with astigmatic pearl and bonding agent, this diffusion layer is positioned on the light dispersion member, and astigmatic pearl will be penetrated the light that comes from light dispersion member and disperse, and bonding agent is fixed on astigmatic pearl on the light dispersion member.

16. backlight assembly as claimed in claim 1, wherein said distance are to measure between the center of light source part adjacent one another are.

17. backlight assembly as claimed in claim 16, wherein this is spaced apart 0.286 to 0.51 times of described distance.

18. backlight assembly as claimed in claim 16, the wherein said 7.0mm that is spaced apart is to 12.5mm.

19. backlight assembly as claimed in claim 16, wherein said distance are that 3.75mm is to 43.7mm.

20. a backlight assembly comprises:

Light source, this light source has a plurality of light source parts, is limited with equal distance between the light source part adjacent one another are, and each light source part all just in time is positioned under each spine in vertical direction, and light source produces light; With

Reflecting plate, this reflecting plate is positioned under the light source, and reflecting plate is the lower surface portion sub reflector of the light of incident on it to astigmatism plate,

Wherein between the center of first light source part and the reflecting plate vertically be at interval equate and be 0.10 to 0.25 times of this distance.

21. backlight assembly as claimed in claim 20, wherein said distance are to measure between the center of light source part adjacent one another are.

22. backlight assembly as claimed in claim 20, wherein this is spaced apart 0.139 to 0.212 times of described distance.

23. backlight assembly as claimed in claim 20, the wherein said 3.1mm that is spaced apart is to 5.4mm.