CN103104858A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN103104858A CN103104858A CN2012100995792A CN201210099579A CN103104858A CN 103104858 A CN103104858 A CN 103104858A CN 2012100995792 A CN2012100995792 A CN 2012100995792A CN 201210099579 A CN201210099579 A CN 201210099579A CN 103104858 A CN103104858 A CN 103104858A
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Abstract
The invention provides a backlight module which comprises a base board, at least one light bar and a plurality of optical elements, wherein base board is provided with a first side edge, the light bar is provided with a plurality of light sources and comprises a first area and a second area, the first area and the first side edge are adjacent, and the light source in the first area is provided with a first separation distance. The second area and the first area are adjacent, the light source in the second area is provided with a second separation distance, and the first separation distance is smaller than the second separation distance. The optical elements are arranged above each light source to be used for enabling the light sources to emit light evenly.
Description
Technical field
The invention relates to a kind of backlight module, particularly about a kind of by the light source arrangement mode, to improve the backlight module of penumbra area phenomenon.
Background technology
Generally be applied in the liquid crystal display of massaging device, can be according to the demand of actual design, and select to utilize the backlight module framework of straight-down negative or side-light type.In direct type backlight module, the corner of display unit causes display quality to descend in default of the penumbra area that the light irradiation produces.
In known technology, usually adopt diffuser plate, the light that passes through is evenly shed.Wherein, for the uniformity that the effect that adds high light diffusion and light mix, the gap between light source and diffuser plate must increase, and perhaps the usage quantity of diffuser plate must increase.Yet, structural design effect limited not only so, and will cause the thickness of backlight module to increase, and disagree with the lightening design original intention of liquid crystal display.
In addition, receive more light in order to make display unit from backlight module, the more multiple light source of backlight module domestic demand configuration.Yet using light emitting diode one is in the backlight module of light emitting source, and the manufacturing cost of light emitting diode is expensive, and unfavorable economy is considered.
Summary of the invention
In view of this, a purpose of the present invention is to provide a kind of backlight module, and the permutations of light source on the backlight module strengthens the light source supply of display unit corner.Another object of the present invention is to reduce the quantity of light source, with Decrease production cost.
For achieving the above object, the invention provides a kind of backlight module, it comprises a substrate, at least one striation and a plurality of optical element.Substrate has a first side.Striation has a plurality of light sources, and comprises a first area and a second area.Adjacent first side, first area, the light source in the first area have one first spacing.Light source in the adjacent first area of second area, second area has one second spacing, and wherein the first spacing is less than the second spacing.Optical element is arranged at above each light source, and wherein the incidence surface of each optical element comprises one first concave curved surface towards the direction depression away from light source, and the exiting surface of optical element comprises that one second concave curved surface is towards the direction depression of light source.
The present invention also provides a kind of display unit of using above-mentioned backlight module, and wherein a display floater is arranged on above-mentioned backlight module.
Due to the spacing that is smaller than near the spacing between the adjacent light source of substrate first side and second side between other regional adjacent light source, and see through optical element with further evenly diffusion of light source, will make display unit each zone obtain fully light source from backlight module.So, the brightness irregularities shortcoming of known display screen can be improved.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 shows the profile of the display unit of preferred embodiment of the present invention;
Fig. 2 shows the top view of the subelement of Fig. 1;
Fig. 3 shows that the distribution of light sources density of unit length of preferred embodiment of the present invention is with respect to the curve map of striation position;
Fig. 4 shows the top view of subelement of the display unit of another embodiment of the present invention;
Fig. 5 shows the top view of subelement of the display unit of another embodiment of the present invention;
Fig. 6 shows the enlarged drawing of subelement in Fig. 1;
Fig. 7 A-7E shows the structure of the optical element of different kenels;
Fig. 8 A-8B shows the structure of the optical element of different kenels;
Fig. 9 A-9D shows the structure of the optical element of different kenels;
Figure 10 A shows the light source of preferred embodiment of the present invention and the ground plan of optical element; And
Figure 10 B shows the light source of another embodiment of the present invention and the ground plan of optical element.
The main element symbol description:
1～display unit
10,10 '～backlight module
20～blooming lamella
30～display floater
50～substrate
51～minor face side plate (first side)
52～minor face side plate (second side)
53,54～long side plate
531,541～mid point
55～optical reflecting layer
56～base plate
100,100 '～striation
110,110 ', 210～light source
140,240～optical element
141,241～the first concave curved surfaces
143,243～exiting surface
145,245～bottom surface
147～support member
240a-240e～optical element
241a-241e～first concave curved surface
247d～projection
340a-340b～optical element
341a-341b～first concave curved surface
345a-345b～bottom surface
440a-440b～optical element
445a-445d～bottom surface
449a-449d～micro-structural
C～axis
D～unit length distribution of light sources density
D1-D4～width
E
1The～the first width (minor axis)
E
2The～the second width (major axis)
H～highly
L～length limit
L1～first distance
L2～second distance
M～symmetrical centre
P1-p9～spacing
S1～second concave curved surface
S2～convex surface
S21～first light output surface
S22～second light output surface
W～minor face
θ
1, θ
2, θ
3～angle
I～first area
II～second area
III～the 3rd zone
IV～the 4th zone
V～the 5th zone
VI～the 6th zone
VII～SECTOR-SEVEN territory
VIII～first intermediary district
IX～second intermediary district
The specific embodiment
Now coordinate the description of drawings preferred embodiment.
See also Fig. 1,2.The display unit 1 of preferred embodiment of the present invention comprises a backlight module 10, a blooming lamella 20 and a display floater 30, and wherein backlight module 10 comprises a substrate 50, an optical reflecting layer 55, two striations 100, a plurality of light source 110 and a plurality of optical elements 140.
Substrate 50 is in order to the optical element in carrying and location backlight module 10, it comprises two minor face side plates 51,52, two long side plates 53,54 and one base plate 56, in one embodiment, the length-width ratio of its base plate 56 is 16:9, wherein minor face side plate 51,52 is the vertical direction that is defined in Fig. 2 drawing, long side plate 53,54 is the horizontal direction that is defined in Fig. 2 drawing, minor face side plate 51,52 and long side plate 53,54 be to be connected with base plate 56, its planar process vector in twos mutually vertical or out of plumb all can.Generally speaking, when display unit 1 upright ornaments of the present invention, minor face side plate 51,52 is left and right two sides that are positioned at the user, and long side plate 53,54 is two sides up and down (following explanation will represent that minor face side plate 51, second side represent minor face side plate 52 with the first side) that are arranged in the user.Optical reflecting layer 55 is arranged at the inboard of substrate 50, uses reflection ray to increase the light diffusion effect.Substrate 50 is furnished with driver circuit, can be electrically connected to other elements and make backlight module 10 runnings.
Two striations 100 be parallel to long side plate 53,54 direction is arranged on base plate 56.Each striation 100 comprises respectively a first area I, a second area II, one the 3rd regional III, one the 4th regional IV, one the 5th regional V, one the 6th regional VI, a SECTOR-SEVEN territory VII, the one first district VIII of intermediary, the one second district IX of intermediary.The adjacent first side 51 of first area I, the adjacent first area I of second area II, the 3rd regional III adjacent second side 52, the 4th regional IV the adjacent the 3rd regional III, the 5th regional V is between second area II and the 4th regional IV, have the 6th regional VI and the first district VIII of intermediary between the 5th regional V and second area II, have SECTOR-SEVEN territory VII and the second district IX of intermediary between the 5th regional V and the 4th regional IV.In addition, in this embodiment, the 5th regional V essence middle position has an axis C and passes, and wherein the distance of 100 liang of short sides of axis C and striation equates, this striation 100 of decile, and each zone is mirror image along axis C and distributes, corresponding the 3rd regional III of first area I namely, corresponding the 4th regional IV of second area II, the 6th corresponding SECTOR-SEVEN territory VII of regional VI, the first corresponding the second district IX of intermediary of the district VIII of intermediary, corresponding the 5th regional V right side part of the 5th regional V left part.But in other embodiment, axis C not necessarily passes through the specific region of striation 100, and on striation 100, each zone also not necessarily is the mirror image distribution along axis C.Striation 100 is for example printed circuit board (PCB) (PCB), has the light source driver circuit, light source 110 is received after the signals of telecommunication luminous.Light source 100 is in fact a straight line setting along striation 100 major axis, and single striation 100 can hold the array of source that one or more straight line arranges.In addition, between the light source 110 of single light source array, cording has the design of unequal-interval, but light source 110 spacings in same " zone " are identical, namely the density d of light source 110 is identical, and light source 110 spacings in " intermediary district " are not necessarily identical, and its light source 110 density d can be definite value or changing value, wherein distance (pitch) between light source 110, mean the beeline at two adjacent light sources 100 centers, greater than 0.
First area I is the zone of striation 100 the most contiguous first sides 51, has a plurality of light sources 110, forms each other more than one light source 110 spacings, but all has common light source 110 spacing p1.The adjacent first area I of second area II, have a plurality of light sources 110, form each other more than one light source 110 spacings, but all have common light source 110 spacing p2, wherein p1 is less than p2, and in other words first area I light source 110 density d are greater than second area II light source 110 density d.The part of first area I and second area II adjacency is the light source 110 that shares, and this shares light source 110 centers are the conversion boundary (switching boundary) of spacing p1 and spacing p2.
The zone that the 3rd regional III is striation 100 the most contiguous second sides 52 has a plurality of light sources 110, forms each other more than one light source 110 spacings, but all has common light source 110 spacing p3.The 4th regional IV the adjacent the 3rd regional III, have a plurality of light sources 110, form each other more than one light source 110 spacings, but all have common light source 110 spacing p4, wherein p3 is less than p4, and in other words the 3rd regional III light source 110 density d are greater than the 4th regional IV light source 110 density d.The part of the 3rd regional III and the 4th regional IV adjacency is the light source 110 that shares, and this shares light source 110 centers are the conversion boundary of spacing p3 and spacing p4.In this embodiment, first area I equates with the 3rd regional III spacing number, and spacing p1 equals p3; Second area II equates with the 4th regional IV spacing number, and spacing p2 equals p4, but do not limit as for this.In other embodiment, spacing p1 and spacing p3 can be unequal, and spacing p2 and spacing p4 can be unequal, or spacing p1 is different from spacing p2～p4.In brief, along axis C be between the regional that mirror image distributes can be apart from number identical or different.In addition, the second area II of striation 100 also can be combined with the 4th regional IV, or striation 100 only comprises first area I and second area II... etc., looks closely the design of whole optics and decides.
The 5th regional V is between second area II and the 4th regional IV, has a plurality of light sources 110, forms each other more than one light source 110 spacings, but all has common light source 110 spacing p5.In this embodiment, be separated with other zones between between the 5th regional V and second area II and the 4th regional IV, and the 5th regional V is positioned at striation 100 centers, it is central that axis C passes through the 5th regional V, spacing p5 is less than spacing p2 and spacing p4, light source 110 density d of the 5th regional V are greater than second area II and the 4th regional IV comparatively speaking, and light source 110 is roughly presented the arrangement mode of close-thin-Mi-thin-Mi by the density d of first side 51 to second side direction 52.In other embodiment, axis C does not pass through the 5th regional V central authorities, and spacing p5 can equate or be not equal to spacing p1～p4, and the 5th regional V can be with second area II, the 4th regional IV is adjacent even is combined, even without the 5th regional V... etc., look closely the design of whole optics and decide.
The 6th regional VI is between second area II and the 5th regional V, has a plurality of light sources 110, forms each other more than one light source 110 spacings, but all has common light source 110 spacing p6, and wherein spacing p6 is greater than spacing p1 and spacing p2.VII system in SECTOR-SEVEN territory has a plurality of light sources 110 between the 4th regional IV and the 5th regional V, form each other more than one light source 110 spacings, but all have common light source 110 spacing p7, and wherein spacing p7 is greater than spacing p3 and spacing p4.In the present embodiment, the 6th regional VI is adjacent with second area II, SECTOR-SEVEN territory VII is adjacent with the 4th regional IV, spacing p6 equals spacing p7, and spacing p6 and spacing p7 are all greater than spacing p1～p5, in other words, the light source density d of the 6th regional VI and SECTOR-SEVEN territory VII other zones relatively is large, and light source 110 is presented the arrangement mode of close-thin-Mi-thin-Mi equally by the density d of first side 51 to second side direction 52.In other embodiment, the 6th regional VI and second area II can be non-conterminous, SECTOR-SEVEN territory VII and the 4th regional IV can be non-conterminous, spacing p6 and spacing p7 can equate with the relation of other spacings p1～p5 or be unequal, the 6th regional VI and SECTOR-SEVEN territory VII also can be in conjunction with other zones, even without the 6th regional VI and SECTOR-SEVEN territory VII... etc., look closely the design of whole optics and decide.
The first district VIII of intermediary is between the 5th regional V and the 6th regional VI, has a plurality of light sources 110, forms each other more than one light source 110 spacings, can have identical or different light sources 110 spacings, but between average light source, distance is spacing p8.The second district IX of intermediary is between the 5th regional V and SECTOR-SEVEN territory VII, has a plurality of light sources 110, forms each other more than one light source 110 spacings, can have identical or different light sources 110 spacings, but average space between light sources is spacing p9.In the present embodiment, the space between light sources in the first district VIII of intermediary and the second district IX of intermediary is identical, and spacing p8 and spacing p9 are identical, and the first district VIII of intermediary the adjacent the 5th regional V and the 6th regional VI, the second district IX of intermediary the adjacent the 5th regional V and the 6th regional VII.The intermediary district can be considered the single interval that is merged by a plurality of zones.In other embodiment, between in the first district VIII of intermediary and the second district IX of intermediary, distance can change, for example cumulative, decrescence, equate or irregular variation, spacing p8 and spacing p9 and spacing p1～p7 there is no specific relation, between in the first district VIII of intermediary or the second district IX of intermediary apart from can be between adjacent area spacing p5～p7 or arbitrary value, the first district VIII of intermediary or the second district IX of intermediary also can be in conjunction with other zones, even without the first district VIII of intermediary or the second district IX... of intermediary etc., look closely the design of whole optics and decide.The concept in intermediary district is extensible, for example in inserting an intermediary district between second area II and the 6th regional VI or between the 4th regional IV and SECTOR-SEVEN territory VII.
In one embodiment, the display unit 1 of using backlight module 10 is of a size of 31.5 inches, spacing p1 and spacing p3 are 40mm, spacing p2 and spacing p4 are 50mm, spacing p6 and spacing p7 are 60mm, spacing p8 and spacing p9 are 50mm, and spacing p5 is 40mm, and light source 110 is presented the arrangement mode of close-thin-Mi-thin-Mi equally by the density d of first side 51 to second side direction 52.But be not restricted to this.It should be noted that in the present embodiment, although it is symmetrical to be positioned at the spacing p1 of axis C two sides of striation 100～p9 mirror images of each other, should not be limited to this.Those skilled in the art can according to the essence spirit of the present embodiment, be adjusted the spacing between adjacent light source.
See also Fig. 3.Fig. 3 shows that in preferred embodiment of the present invention, on unit length, the distribution of light sources density d is with respect to the curve map of striation 100 positions.Overall View it, in the above embodiment of the present invention, unit length distribution of light sources density d has variation, wherein from the first side 51 of substrate 50 on the direction of second side 52, unit length distribution of light sources density d presents close, thin, close, thin, close variation.In details of the words, from the regional VI of first area I to the six, unit length distribution of light sources density d decrescence; From the 6th regional V of regional IV to the five, unit length distribution of light sources density d is cumulative; To SECTOR-SEVEN territory VII, unit length distribution of light sources density d decrescence from the 5th regional V; To second area II, unit length distribution of light sources density d is cumulative from SECTOR-SEVEN territory VII.
Be indebted to the arrangement mode of light source 110 on two striations 100, display floater 30 is except keeping center brightness, and its four corner also can increase the light of reception.Therefore, in known technology, four corners have the situation of penumbra area and can improve.In an experimental data, the center brightness of display floater 30 is 105%, and all neat degree is 65%, this all neat degree be defined as the ratio of the dim spot of display floater and bright spot.
See also Fig. 4.Fig. 4 shows the top view of the backlight module 10 ' of another embodiment of the present invention.Be simplified illustration, backlight module 10 ' will be bestowed similar label to the same or analogous element of backlight module 10, and its feature will no longer illustrate.
The form of the light source on striation 100 ' is not limited by embodiment shown in Figure 2.In another embodiment, the adjacent the 5th regional V is the 6th regional VI and SECTOR-SEVEN territory VII, there is no intermediary district the first district VIII of intermediary and the second district IX of intermediary of last embodiment.
In one embodiment, the display unit (not shown in Fig. 4) of using backlight module 10 ' is of a size of 31.5 inches, and spacing p5 is 50mm, spacing p6 and spacing p7 are 70mm, spacing p2 and spacing p4 are 40mm, and spacing p1 and spacing p3 are 30mm, but are not restricted to this.It should be noted that in the present embodiment, be mutually symmetrical although be positioned at the spacing of axis C two sides of striation 100 ', should not be limited to this.Those skilled in the art can according to the essence spirit of the present embodiment, be adjusted the spacing between adjacent light source.
In an experimental data, using the center brightness of the display floater (not shown in Fig. 4) of this backlight module 10 ' is 100%, and all neat degree is 70%, this all neat degree be defined as the ratio of the dim spot of display floater and bright spot.
See also Fig. 5.Fig. 5 shows the backlight module 10 of another embodiment of the present invention " the top view of subelement.Be simplified illustration, backlight module 10 " will bestow similar label to the same or analogous element of backlight module 10, and its feature will no longer illustrate.
Use backlight module 10 in order further to improve " the situation of display unit (not shown in Fig. 5) penumbra area, the axis C of two striations 100 reaches skew to the right left from two long side plates 53,54 mid point 531,541 line respectively.As shown in Figure 5, the axis C that is positioned at the striation (the first striation) 100 of drawing top is offset left with respect to mid point 531,541 line, and the axis C that is positioned at the striation (the second striation) 100 of drawing below is offset to the right with respect to mid point 531,541 line.So, the short side that is positioned at the striation (the first striation) 100 of drawing top is positioned at the short side of striation (the second striation) 100 of drawing below near first side 51, wherein has the first distance L 1 between the short side of the striation (the first striation) 100 of drawing top and first side 51, be positioned between the short side of drawing below striation 100 (the second striation) and first side 51 and have second distance L2, wherein the first distance L 1 is less than second distance L2.
The architectural feature of optical element 140 of the present invention will further illustrate.Please refer to Fig. 6, Fig. 6 shows the enlarged drawing of subelement in Fig. 1, wherein only shows single optical element 140, single light source 110 and part substrate 50.Optical element 140 comprises one first concave curved surface 141, an exiting surface 143, a bottom surface 145 and the support member more than two 147.The first concave curved surface 141 is in the face of the exiting surface of light source 110, and wherein the light from light source 110 enters in optical element 140 through the first concave curved surface 141.That is the first concave curved surface 141 is the incidence surface of optical element 140, but should not be limited to this.Light also may enter in optical element 140 through the bottom surface 145 of optical element 140.145 towards the direction depression away from the exiting surface of light source 110, and as shown in Figure 6, the first concave curved surface 141 has in fact half long oval external form to the first concave curved surface 141 from the bottom surface.In addition, the symmetrical centre M of the first concave curved surface 141 relative optical elements 140 axisymmetricly.In other words, the cross section of the first concave curved surface 141 is one circular or oval (detail characteristic of the first concave curved surface 141 will describe in detail in the explanation of Figure 10 A figure).
Exiting surface 143 is faced blooming lamella 20 (Fig. 1), that is is positioned at optical element 140 in contrast to a side of light source 110.Exiting surface 143 comprises one second concave curved surface S1, a convex surface S2.In this embodiment, the second concave curved surface S1 and convex surface S2 be axial symmetry in symmetrical centre M, wherein symmetrical centre M is through the center of light source 110 and the essence center of optical element 140.The second concave curved surface S1 is towards the direction depression of light source 110, and the angle theta between its normal and direction X
1Be 90 to 180 degree.Convex surface S2 is surrounded on outside the second concave curved surface S1, and comprises one first light output surface S21 and one second light output surface S22.Adjacent this second concave curved surface of the first light output surface S21 S1, the wherein angle theta between the normal of the first light output surface S21 and direction X
2It is 0 to 90 degree.Adjacent the first light output surface S21 of the second light output surface S22 is away from the side of the second concave curved surface S1, the wherein angle theta between the normal of the second light output surface S22 and direction X
3Between angle be 0 to-90 degree, above-mentioned direction X system extends to optical element 140 outsides from the symmetrical centre M of optical element 140 and the direction of parallel substrate 50, as shown in Figure 6 as.
As it should be noted that as shown in Figure 6, the first concave curved surface 141 of optical element 140, exiting surface 143 are all the curved surface with continuous curvature, and 145 of the bottom surfaces of optical element 140 are a plane in the face of substrate 50; In addition, the width D 3 that the first concave curved surface 141 is faced the opening of this light source 110 is the width D 4 more than or equal to light source 110, mutually interferes to avoid light source 110 and optical element 140.The width D 3 of the opening of specific embodiment first concave curved surface 141 be between the width D 4 of light source 110 100% to 150% between.
After above-mentioned optical element 140, its light shape will be adjusted to some extent, shine in the light uniformity of blooming lamella 20 (Fig. 1) with raising from the light of light source 110.Be with, the image quality of display unit 1 (Fig. 1) will further be improved.
The architectural feature of optical element 140 of the present invention can be changed because of demand, following illustrative provide optical element possible embodiment: see also Fig. 7 A-Fig. 9, in Fig. 7 A-optical element shown in Figure 9, to bestow similar label with the element that optical element 140 (Fig. 6) is similar or corresponding, and the feature that has illustrated will be omitted in the following description.
The kenel of the first concave curved surface of optical element can have following variation: the first concave curved surface 241b that the first concave curved surface 241a of optical element 240a has in fact semicircular external form (Fig. 7 A), optical element 240b has in fact the external form (Fig. 7 B) of half flat ellipse, the first concave curved surface 241c of optical element 240c has in fact corrugated external form (Fig. 7 C), perhaps the first concave curved surface 241d of optical element 240d has in fact the external form of class bielliptic(al), and wherein a protruding 247d is formed at its essence center (Fig. 7 D).In one embodiment, optical element 240d is applied to a 3D display unit, and the first concave curved surface 241d can receive the light that two light sources 110 that are relatively arranged on protruding 247d both sides send.Can utilize different optical elements according to different demands, make the light diffusion effect reach best.For example, in one embodiment, when a plurality of light sources are arranged at single optical element inside, the optical element 240c of Fig. 7 C or the optical element 240d of Fig. 7 D can make the light diffusion effect reach best.
In another embodiment, the first concave curved surface 241e of optical element 240e is non-axial symmetry, as shown in Fig. 7 E as, the external form of the first concave curved surface 241e is crooked towards a specific direction, to create the effect of the different amount of lights in the left and right sides.
The kenel of the bottom surface of optical element can have following variation:
In the embodiment shown in Fig. 8 A, the angle α between the plane, exiting surface place of the tangent line of the first adjacent bottom surface 345a of concave curved surface 341a and light source 110 equals 90 degree, and at this moment, the bottom surface 345a of optical element 340a is the plane, exiting surface place that is aligned in light source 110.In the embodiment shown in Fig. 8 B, angle α between the plane, exiting surface place of the tangent line of the first adjacent bottom surface 345b of concave curved surface 341b and light source 110 is less than 90 degree, at this moment, with the maximum angle of emergence leave the light of light source 110 will be not along continuous straight runs by optical element 340b.At this moment, have an angle β between the plane, exiting surface place of the bottom surface 345b of optical element 340b and light source 110, to save the production material of optical element, reduce costs.
In the embodiment shown in Fig. 9 A, the bottom surface 445a of optical element 440a also comprises the micro-structural 449a of a plurality of depressions, and each micro-structural has a semicircular appearance.In the embodiment shown in Fig. 9 B, the bottom surface 445b of optical element 440b also comprises the micro-structural 449b of a plurality of projections, and each micro-structural has a semicircular appearance.In the embodiment shown in Fig. 9 C, the bottom surface 445c of optical element 440c also comprises the micro-structural 449c of a plurality of depressions, and each micro-structural has a semi-hexagonal appearance.In the embodiment shown in Fig. 9 D, the bottom surface 445d of optical element 440d also comprises the micro-structural 449d of a plurality of projections, and each micro-structural has a semi-hexagonal appearance.The moulding of raised or sunken micro-structural can be arbitrary shape, is not limited to above-described embodiment.In one embodiment, the degree of depth of above-mentioned raised or sunken micro-structural or highly all less than 10% of the width of the bottom surface of optical element.In addition, although in the above-described embodiments, the micro-structural of adjacent protrusion or depression is all equidistantly, and raised or sunken micro-structural can also irregular form distribute.
See also Figure 10 A, Figure 10 A shows the light source 110 of preferred embodiment of the present invention and the ground plan of optical element 140.In this embodiment, light source 110 is a square, therefore will penetrate towards all directions equably from the light of light source 110.Be the light shape of the light that coordinates light source 110, the first concave curved surface 141 is preferably that axial symmetry is in the symmetrical centre of optical element 140.See also Figure 10 B, Figure 10 B shows the light source 210 of another embodiment of the present invention and the ground plan of optical element 240.In this embodiment, light source 210 is one to have the rectangle of width W and length L, thus will provide more light in a side of length L from light source 210, and provide less light in a side of width W.Light shape for the light that coordinates light source 210, the first concave curved surface 241 is preferably that non-axial symmetry is in the symmetrical centre of optical element 140, providing larger light-receiving area with respect to light source 210 length L one sides, and provide less light-receiving area with respect to light source 210 width W one sides.In one embodiment, the openend of the first concave curved surface 241 is one to have minor axis (the first width) E
1And major axis (the second width) E
2Ellipse, wherein a side of light source 210 width W is corresponding to major axis (the second width) E
2, and a side of light source 210 length L is corresponding to minor axis (the first width) E
1More specifically, a side of light source 210 width W is along major axis (the second width) E
2Arrange, and a side of light source 210 length L is along minor axis (the first width) E
1Arrange.Please be simultaneously with reference to Figure 10 A, 10B, the present inventor's discovery, the light shape that emits beam according to light source 110,210 is adjusted optical element 140,240 incidence surface 141,241 shape, can further reach the uniform purpose of bright dipping.
By the arrangement of light source of backlight module, the light that is positioned at display unit four corners all together degree can effectively be enhanced, help to improve the image quality of display floater.On the other hand, by the light of optical element diffusion from light source, the quantity of light source of backlight module can further reduce, to reduce production costs.
Although the present invention discloses as above with preferred embodiment; so it is not to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can do a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (29)
1. a backlight module comprises:
One substrate has a first side;
At least one striation has a plurality of light sources, comprising:
One first area, adjacent this first side, the light source in this first area has one first spacing; And
One second area, adjacent this first area, the light source in this second area has one second spacing, and wherein this first spacing is less than this second spacing; And
A plurality of optical elements are arranged at above described each light source, and wherein each described optical element comprises one first concave curved surface towards the direction depression away from light source, and described optical element comprises that one second concave curved surface is towards the direction depression of light source.
2. backlight module as claimed in claim 1, is characterized in that, this substrate has a second side, and this second side is relative with this first side, and this striation comprises:
One the 3rd zone, adjacent this second side, the light source in the 3rd zone has one the 3rd spacing; And
One the 4th zone, adjacent the 3rd zone, the light source in the 4th zone has one the 4th spacing, and wherein the 3rd spacing is less than the 4th spacing.
3. backlight module as claimed in claim 2, is characterized in that, this first spacing equals the 3rd spacing.
4. backlight module as claimed in claim 2, is characterized in that, this second spacing equals the 4th spacing.
5. backlight module as claimed in claim 2, is characterized in that, being situated between between this second area and the 4th spacing has one the 5th zone, and the light source in the 5th zone has one the 5th spacing.
6. backlight module as claimed in claim 5, is characterized in that, the 5th zone is adjacent with this second area and the 4th zone.
7. backlight module as claimed in claim 5, is characterized in that, being situated between between the 5th zone and this second area has one the 6th zone, and the light source in the 6th zone has one the 6th spacing, and the 6th spacing is greater than this second spacing and the 5th spacing.
8. backlight module as claimed in claim 7, is characterized in that, the 6th zone is adjacent with this second area and the 5th zone.
9. backlight module as claimed in claim 8, is characterized in that, being situated between between the 5th zone and the 6th zone has one first intermediary district.
10. backlight module as claimed in claim 7, is characterized in that, being situated between between the 5th zone and the 4th zone has a SECTOR-SEVEN territory, and the light source in this SECTOR-SEVEN territory has one the 7th spacing, and the 7th spacing is greater than the 4th spacing and the 5th spacing.
11. backlight module as claimed in claim 10 is characterized in that, this SECTOR-SEVEN territory and the 4th zone and the 5th zone are adjacent.
12. backlight module as claimed in claim 10 is characterized in that, the 6th spacing equals the 7th spacing.
13. backlight module as claimed in claim 10 is characterized in that, being situated between between the 5th zone and this SECTOR-SEVEN territory has one second intermediary district.
14. backlight module as claimed in claim 1, it is characterized in that, this first side and this second side are respectively two minor face side plates of this substrate, and this substrate also comprises the two long side plates that are linked to this two minor faces side plate, and wherein this striation is parallel to this two long sides plate.
15. backlight module as claimed in claim 1, it is characterized in that, this backlight module comprises one first striation and one second striation, adjacent this first striation of this second striation, wherein has one first distance between this first striation and this first side, have a second distance between this second striation and this first side, this first distance is less than or equal to this second distance.
16. backlight module as claimed in claim 1, it is characterized in that, this optical element also comprises a bottom surface, and towards the direction depression away from light source, wherein the confluce of this first concave curved surface and this bottom surface is the plane, exiting surface place that is positioned at light source to this first concave curved surface from this bottom surface.
17. backlight module as claimed in claim 16 is characterized in that, this bottom surface comprises a plurality of micro-structurals, and this bottom surface is raised or sunken certainly.
18. backlight module as claimed in claim 16 is characterized in that, the angle between the tangent line of this first concave curved surface adjacent this bottom surface and the plane, exiting surface place of light source is less than or equal to 90 degree.
19. backlight module as claimed in claim 16 is characterized in that, this optical element also comprises a support member, and this support member of this underrun is linked to this substrate, and wherein the height of this support member equals the exiting surface of this light source to the height of this substrate.
20. backlight module as claimed in claim 16 is characterized in that, this optical element also comprises a support member, the width of this support member between the width of this bottom surface 2% to 20% between.
21. backlight module as claimed in claim 1 is characterized in that, the angle that the normal of this second concave curved surface and this substrate extend between the plane is 90 to 180 degree.
22. backlight module as claimed in claim 1 is characterized in that, this optical element also comprises a convex surface, and around this second concave curved surface, this convex surface is to protrude towards the direction away from adjacent light source.
23. backlight module as claimed in claim 22 is characterized in that, this convex surface comprises:
One first light output surface, adjacent this second concave curved surface, wherein the angle between the normal of this first light output surface and this substrate extension plane is 0 to 90 degree; And
One second light output surface, adjacent this first light output surface are away from a side of this second concave curved surface, and wherein the angle between the normal of this second light output surface and this substrate extension plane is 0 to-90 degree.
24. backlight module as claimed in claim 22 is characterized in that, this second concave curved surface and this convex surface are axial symmetry in the line at the essence center of this light source center and this optical element.
25. backlight module as claimed in claim 1 is characterized in that, in this exiting surface of this light source be axial symmetry in the symmetrical centre of this optical element, and this first concave curved surface is that axial symmetry is in the symmetrical centre of this optical element.
26. backlight module as claimed in claim 1 is characterized in that, in this exiting surface of this light source be non-axial symmetry in the symmetrical centre of this optical element, and this first concave curved surface is that non-axial symmetry is in the symmetrical centre of this optical element.
27. backlight module as claimed in claim 1, it is characterized in that, the cross section of this first concave curved surface comprises one first width and second width greater than this first width, wherein the long limit of the exiting surface of this light source is corresponding to this first width, and the minor face of the exiting surface of this light source is corresponding to this second width.
28. backlight module as claimed in claim 1 is characterized in that, this first concave curved surface in the face of the width of the opening of this light source between the width of this light source 100% to 150% between.
29. a display unit comprises:
One backlight module comprises:
One substrate has a first side;
At least one striation has a plurality of light sources, comprising:
One first area, adjacent this first side, the light source in this first area has one first spacing;
One second area, adjacent this first area, the light source in this second area has one second spacing, and wherein this first spacing is less than this second spacing; And
A plurality of optical elements are arranged at above described each light source, and wherein the incidence surface of each described optical element comprises one first concave curved surface towards the direction depression away from light source, and the exiting surface of described optical element comprises that one second concave curved surface is towards the direction depression of light source; And
One display floater is arranged on this backlight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210099579.2A CN103104858B (en) | 2011-11-15 | 2012-04-06 | Backlight module and display device |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110391588.4 | 2011-11-15 | ||
| CN2011103915884 | 2011-11-15 | ||
| CN201110391588 | 2011-11-15 | ||
| CN201210099579.2A CN103104858B (en) | 2011-11-15 | 2012-04-06 | Backlight module and display device |
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| Publication Number | Publication Date |
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| CN103104858A true CN103104858A (en) | 2013-05-15 |
| CN103104858B CN103104858B (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210099579.2A Expired - Fee Related CN103104858B (en) | 2011-11-15 | 2012-04-06 | Backlight module and display device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976535A (en) * | 2014-04-11 | 2015-10-14 | 松下知识产权经营株式会社 | LED unit and LED luminaire |
| CN105652518A (en) * | 2015-12-11 | 2016-06-08 | 友达光电股份有限公司 | Light source module |
| CN108072997A (en) * | 2016-11-17 | 2018-05-25 | 鸿富锦精密工业（深圳）有限公司 | Down straight aphototropism mode set and liquid crystal display |
| CN110858041A (en) * | 2018-08-23 | 2020-03-03 | 群创光电股份有限公司 | Electronic device |
| WO2020150867A1 (en) * | 2019-01-21 | 2020-07-30 | 京东方科技集团股份有限公司 | Direct-type backlight source and manufacturing method therefor, and display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1873503A (en) * | 2005-05-31 | 2006-12-06 | Lg.菲利浦Lcd株式会社 | Backlight assembly for liquid crystal display device and liquid crystal display device using the same |
| US20060290620A1 (en) * | 2005-06-27 | 2006-12-28 | Au Optronics Corp. | Direct type backlight |
| CN1963289A (en) * | 2005-11-11 | 2007-05-16 | 株式会社日立显示器 | Illuminating device and liquid-crystal display device using the same |
| WO2010146920A1 (en) * | 2009-06-15 | 2010-12-23 | シャープ株式会社 | Illumination device, display device, and television receiver |
-
2012
- 2012-04-06 CN CN201210099579.2A patent/CN103104858B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1873503A (en) * | 2005-05-31 | 2006-12-06 | Lg.菲利浦Lcd株式会社 | Backlight assembly for liquid crystal display device and liquid crystal display device using the same |
| US20060290620A1 (en) * | 2005-06-27 | 2006-12-28 | Au Optronics Corp. | Direct type backlight |
| CN1963289A (en) * | 2005-11-11 | 2007-05-16 | 株式会社日立显示器 | Illuminating device and liquid-crystal display device using the same |
| WO2010146920A1 (en) * | 2009-06-15 | 2010-12-23 | シャープ株式会社 | Illumination device, display device, and television receiver |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976535A (en) * | 2014-04-11 | 2015-10-14 | 松下知识产权经营株式会社 | LED unit and LED luminaire |
| CN105652518A (en) * | 2015-12-11 | 2016-06-08 | 友达光电股份有限公司 | Light source module |
| US10067383B2 (en) | 2015-12-11 | 2018-09-04 | Au Optronics Corporation | Light source module |
| CN105652518B (en) * | 2015-12-11 | 2019-12-17 | 友达光电股份有限公司 | Light source module |
| CN108072997A (en) * | 2016-11-17 | 2018-05-25 | 鸿富锦精密工业（深圳）有限公司 | Down straight aphototropism mode set and liquid crystal display |
| CN110858041A (en) * | 2018-08-23 | 2020-03-03 | 群创光电股份有限公司 | Electronic device |
| WO2020150867A1 (en) * | 2019-01-21 | 2020-07-30 | 京东方科技集团股份有限公司 | Direct-type backlight source and manufacturing method therefor, and display device |
| US11256133B2 (en) | 2019-01-21 | 2022-02-22 | Beijing Boe Display Technology Co., Ltd. | Direct-lit backlight source and manufacturing method thereof, display device |
| EP3916476A4 (en) * | 2019-01-21 | 2022-08-31 | BOE Technology Group Co., Ltd. | Direct-type backlight source and manufacturing method therefor, and display device |
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|---|---|
| CN103104858B (en) | 2016-08-31 |
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Address after: 518100 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 4, building 1, building Applicant after: Qunkang Technology (Shenzhen) Co., Ltd. Applicant after: Innolux Display Group Address before: 518100 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 4, building 1, building Applicant before: Qunkang Technology (Shenzhen) Co., Ltd. Applicant before: Chimei Optoelectronics Co., Ltd. |
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