CN104456290A - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN104456290A CN104456290A CN201410607017.3A CN201410607017A CN104456290A CN 104456290 A CN104456290 A CN 104456290A CN 201410607017 A CN201410607017 A CN 201410607017A CN 104456290 A CN104456290 A CN 104456290A
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- light
- light source
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- emitting structures
- guide plate
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
Abstract
The invention discloses a backlight module, which comprises a light guide plate and a light source module. The light guide plate is provided with a light incident surface. The light incident surface has a length direction. The light source module is arranged beside the light incident surface. The light source module comprises a reflection frame, an optical regulation and control film and at least one light source. The reflection frame has a supporting plate and a reflection cover. The supporting board and the reflective cover enclose a space, and the space has an opening. The opening faces the light incident surface. The optical regulation and control film is arranged on the bearing plate and covers the opening. The optical control film is provided with a plurality of light-emitting structures. The light penetration of the light-emitting structure is changed along the length direction by taking the projection position of the nearest light source on the optical regulation and control film as a starting point. The light source is arranged on the bearing plate and emits light. The light rays are emitted to the reflecting cover and reflected to the optical regulating film, and part of the light rays pass through the light emitting structure.
Description
Technical field
The present invention about a kind of backlight module, and especially in regard to a kind of backlight module of display unit.
Background technology
Liquid crystal indicator comprises liquid crystal panel and backlight module.Liquid crystal panel is arranged on backlight module, and backlight module can provide light to liquid crystal panel, makes user can watch picture shown by liquid crystal panel.
General backlight module can be divided into direct type backlight module and side-entering type backlight module.Light source is placed in immediately below liquid crystal panel by direct type backlight module, therefore light source can directly emit beam towards liquid crystal panel.Side-entering type backlight module is then arrange light guide plate below liquid crystal panel, and light source is arranged at the side of light guide plate.In use, light source can launch light into the side of light guide plate, and after light advances in light guide plate, can from the end face injection of light guide plate to liquid crystal panel.Light source due to side-entering type backlight module is not be positioned at immediately below liquid crystal panel, without the need to vertical mixed light space, therefore can reduce the thickness of liquid crystal indicator, be beneficial to liquid crystal indicator slimming design, and luxuriant be main flow.
Except slimming design, current liquid crystal indicator also develops towards the designer trends of narrow frame gradually.Under the designer trends of narrow frame, the non-visible area of liquid crystal indicator is designed to be more and more narrow, and is positioned at non-visible area due to the light source of side-entering type backlight module, therefore light source to the distance of visible area will be forced to reduce.When light source reduces to the distance of visible area, because light mixing distance is not enough, the bright dipping of backlight module will present the phenomenon (being also called hot spot phenomenon) of bright dark inequality.In addition, in order to save the cost of liquid crystal indicator, producer often wishes the quantity that can reduce light source, if but the quantity of minimizing light source, will certainly increase the spacing between two adjacent light sources, the increase of this spacing also can cause above-mentioned hot spot phenomenon.
Summary of the invention
In view of this, an object of the present invention is the phenomenon of the bright dark inequality reducing backlight module bright dipping.
In order to achieve the above object, according to one embodiment of the present invention, a kind of backlight module comprises a light guide plate and a light source module.Light guide plate has an incidence surface.Incidence surface has a length direction.Light source module is arranged at by incidence surface.Light source module comprises a reflection frames, optics regulation and control film and an at least one light source.Reflection frames has a loading plate and a reflector.Loading plate and reflector surround into a space, and this space has an opening.This opening is towards incidence surface.Optics regulation and control film is arranged at loading plate and covers opening.Optics regulation and control film has multiple light emitting structures.The light amount of penetrating of light emitting structures with the projected position of immediate light source on optics regulation and control film for starting point alongst changes.Light source is arranged at loading plate, and light source sends a light.Light is incident upon reflector and reflexes to optics regulation and control film, and some light passes through light emitting structures.
In above-mentioned embodiment, due to light source be placed in reflector and loading plate around space in, therefore the some light that sends of light source can be reflexed to optics regulation and control film by reflector, and the light emitting structures regulating and controlling film by optics passes, and enters in light guide plate.Therefore, after light can be passed through reflection process at least one times, just enter in light guide plate, therefore light proceeds to light guide plate path from light source row can be increased, thus be beneficial to mixed light, and utilize multiple light emitting structures to distribute bright dipping by light, thus reduce the phenomenon of bright dark inequality.
According to another embodiment of the present invention, a kind of backlight module comprises a light guide plate and a light source module.Light guide plate has an incidence surface.Incidence surface has a length direction.Light source module is arranged at by incidence surface, and light source module comprises a reflection frames and at least one light source.Reflection frames has a loading plate and a reflector.Loading plate and reflector surround into a space.Reflector has an optics control region.Optics control region is just to incidence surface and the scope of optics control region is corresponding with incidence surface.Optics control region has multiple light emitting structures.The light amount of penetrating of light emitting structures with the projected position of immediate light source on optics control region for starting point alongst changes.Light source is arranged at loading plate.Light source sends a light.Light is incident upon reflector and reflexes to optics control region, and some light is by the wherein at least one of these light emitting structures.
In above-mentioned embodiment, due to light source be placed in reflector and loading plate around space in, therefore the some light that light source sends can be reflexed to its optics control region by reflector, and is passed by the light emitting structures of optics control region, and enters in light guide plate.Therefore, after light can be passed through reflection process at least one times, just enter in light guide plate, therefore light proceeds to light guide plate path from light source row can be increased, thus be beneficial to mixed light, and utilize multiple light emitting structures to distribute bright dipping by light, thus reduce the phenomenon of bright dark inequality.
The above only in order to set forth the present invention for the problem solved, the technological means of dealing with problems and effect etc. of producing thereof, detail of the present invention is introduced in detail by embodiment hereafter and correlative type.
Accompanying drawing explanation
For above and other object of the present invention, feature, advantage and embodiment can be become apparent, being described as follows of institute's accompanying drawings:
Fig. 1 illustrates the part sectioned view of the backlight module according to first embodiment of the invention;
Fig. 2 illustrates according to the light source module of Fig. 1 and the stereogram of light guide plate;
Fig. 3 illustrates the equivalent light path figure of the backlight module of Fig. 1;
Fig. 4 illustrates the simulation light chart of comparative example of the present invention to the 6th figure;
Fig. 7 illustrates the profile of the backlight module according to second embodiment of the invention;
Fig. 8 illustrates the profile of the backlight module according to third embodiment of the invention;
Fig. 9 illustrates the profile of the backlight module according to four embodiment of the invention;
Figure 10 illustrates the profile of the backlight module according to fifth embodiment of the invention;
Figure 11 illustrates the profile of the backlight module according to sixth embodiment of the invention;
Figure 12 illustrates the profile of the backlight module according to seventh embodiment of the invention;
Figure 13 illustrates the profile of the backlight module according to eighth embodiment of the invention;
Figure 14 illustrates the profile of the backlight module according to ninth embodiment of the invention;
Figure 15 illustrates according to the light source module of Figure 14 and the stereogram of light guide plate;
Figure 16 illustrates the profile of the backlight module according to tenth embodiment of the invention; And
Figure 17 illustrates the profile of the backlight module according to eleventh embodiment of the invention.
Wherein, Reference numeral:
1,2,3,4,5,9,7,8,9,10,11: backlight module
100: light source module
110,110a, 110b, 110c, 110d: reflection frames
111: recess
112: loading plate
114,114b, 114c, 114d: reflector
1142: side plate
1144: top board
1146: optics control region
120,120a: light source
130,130a, 130b: optics regulation and control film
131: first area
132,132a, 132b: light emitting structures
133: second area
134,134a, 134b: reflector space
135: recess
200,200a: light guide plate
210: incidence surface
220: exiting surface
300: diaphragm
400: circuit board
500,500a: back of the body frame
501: base plate
502: storage tank
600,600a: glue frame
700: heat-conducting piece
710: protuberance
CX1, CY1, CX2, CY2, CX3, CY3: curve
D: equivalent diameter
F: range of exposures
I: virtual location
L: light
O, O ': opening
R: range of exposures
S, S ': space
T: thickness
X: length direction
Y: short transverse
θ: maximum subtended angle
Detailed description of the invention
Below will with graphic exposure multiple embodiment of the present invention, as clearly stated, the details in many practices will be explained in the following description.But those of ordinary skill in the art should recognize, in some embodiments of the present invention, the details in these practices is also non-essential, does not therefore apply to limit the present invention.In addition, for the purpose of simplicity of illustration, some existing usual structures and element illustrate it by the mode simply illustrated in the drawings.
Fig. 1 illustrates the part sectioned view of the backlight module 1 according to the first embodiment of the present invention.As shown in Figure 1, in present embodiment, backlight module 1 can comprise light source module 100 and light guide plate 200.Light source module 100 comprises reflection frames 110, light source 120 and optics regulation and control film 130.Furthermore, reflection frames 110 has loading plate 112 and reflector 114, and loading plate 112 and reflector 114 surround into space S, and this space S has opening O.Loading plate 112 is in order to carry light source 120, and reflector 114 is for the light reflection mixed light of light source 120 injection; The reflectivity of loading plate 112 and reflector 114 can be identical or different, and reflectivity is better between 50% to 100%, and in present pre-ferred embodiments, reflector 114 is for high reflectance material or inner surface is provided with high reverse--bias material.Loading plate 112 and reflector 114 are preferably metal material, such as aluminium sheet; But in different embodiments, loading plate 112 and reflector 114 also can be made by plastic material or metal material mix with plastic material.
The incidence surface 210 that light source module 100 arranges light guide plate 200 is other, and opening O is towards incidence surface 210.Specifically, can consult Fig. 2, this figure illustrates the light source module 100 of foundation Fig. 1 and the stereogram of light guide plate 200.As shown in Figure 2, optics regulation and control film 130 is arranged at loading plate 112 and covers opening O, optics regulation and control film 130 comprises reflecting surface 134 and multiple light emitting structures 132, the light L that light source 120 produces by roundtrip in the space S of reflecting surface 134 and reflection frames 110, and can pass optics regulation and control film 130 from light emitting structures 132 place.Light emitting structures 132 can be through hole, also non-through hole as structures such as impressions.With preferred embodiment, reflecting surface 134 is formed at the side of optics regulation and control film 130 towards light source 120; Multiple light emitting structures 132 runs through optics regulation and control film 130 respectively.In the embodiment shown in Figure 2, optics regulation and control film 130 comprises first area 131 and second area 133, and light emitting structures 132 is arranged at first area 131, and the corresponding incidence surface 210 in first area 131; And second area 133 does not have light emitting structures 132 and not corresponding incidence surface 210.The wherein allotment of first area 131 and second area 133 scope, can according to the rea adjusting of the incidence surface 210 of light guide plate 200.Therefore, by the quantity and the size that adjust photo structure 132 diverse location on first area 131, the light L from light source 120 can be distributed.In some embodiments, optics regulation and control film 130 is integrally formed with reflector 114.
The incidence surface 210 of light guide plate 200 has length direction X and the short transverse Y perpendicular to length direction X.In detail, length direction X is the direction of parallel exiting surface 220, and short transverse Y is the direction of parallel incidence surface 210.The alongst X compartment of terrain arrangement of multiple light source 120.As previously mentioned, the diverse location of light emitting structures 132 on first area 131 can have different quantity and/or size, and light emitting structures 132 distributes along the length direction X of the incidence surface 210 of light guide plate 200, wherein the light amount of penetrating of light emitting structures 132 can change according to the distance of distance light source 120.
In present pre-ferred embodiments, the light amount of penetrating is with the projected position on optics regulation and control film 130 of immediate light source 120 for starting point, and alongst X is according to the functional value change of the first function preset.In other words, the functional value (the light amount of penetrating) of the first function is cumulative by the distance increase along with the projected position of distance light source 120 on optics regulation and control film 130.In addition, the first function difference can be had with the directionality of the shape of light source 120 or its symmetry.First function is preferably polynomial function, such as secondary or more than three times polynomial functions, but not as limit.In an embodiment of the present invention, the first function is polynomial function as follows:
Tr＝k
1p
n+k
2p
n-1+k
3p
n-2+….+k
np+m
Wherein k
1~ k
nbe respectively with m the coefficient adjusted according to optical demands, p is the distance between light emitting structures 132 and the projected position regulating and controlling on film 130 closest to the light source 120 of this optical texture 132 in optics, and Tr is the light amount of penetrating of this position.For the backlight module of 50 inch panels, the first function is polynomial function as follows:
Tr＝Ap
2+Bp
1+C
A＝-0.0003
B＝0.0232
C＝0
Then, the light L sent from light source 120 distributes through optics regulation and control film 130, improves the uniformity of backlight module bright dipping and solves the bright dark uneven phenomenon that light source 120 causes.In other embodiments of part, the distribution of light emitting structures 132 in first area 131 can be adjusted on demand, light emitting structures 132 also can simultaneously along length direction X and the short transverse Y distribution of the incidence surface 210 of light guide plate 200, and the light amount of penetrating of light emitting structures 132 with immediate light source 120 optics regulation and control film 130 on projected position for starting point, according to preset the first function functional value change.
After the light L sent due to light source 120 is reflected by reflector 114, then through the light emitting structures 132 of optics regulation and control film 130, therefore after caning be passed through reflection process at least one times from the some light L that light source 120 sends, just enter in light guide plate 200.Therefore, even if under the design of narrow frame, the Distance Shortened of light source 120 and light guide plate 200, but the path penetrated to light guide plate 200 from light source 120 due to light L can be elongated, therefore can mixed light be beneficial to, the dark uneven phenomenon of light to reduce.
Above-mentioned light emitting structures 132 is the form of circular perforations, but the shape of perforation is not limited to above-mentioned circle, and in other embodiments, can also be the quadrangle of ellipse, triangle and other patterns, even the shape of each light emitting structures 132 be not identical.Wherein the area of each perforation all has equal area with a circle, namely has the equivalent diameter d waiting and herewith justify.As shown in Figure 2, the distance of projected position that equivalent diameter d and the light emitting structures 132 of light emitting structures 132 regulate and control on film 130 to immediate light source 120 at optics is directly proportional.In other words, the light emitting structures 132 more away from light source 120 has larger equivalent diameter d, and has the higher light amount of penetrating.Therefore, when light source 120 is luminous, even if the light that light source 120 sends is in traveling process, its energy can successively decrease, but because the light emitting structures 132 more away from light source 120 allows more light to pass through, and allow less light to pass through the closer to the light emitting structures 132 of light source 120, therefore the brightness of light source module 100 on alongst X can be comparatively even, and reduce the phenomenon of bright dark inequality.In addition, because the phenomenon of bright dark inequality can be lowered because of aforesaid way, therefore the spacing between two adjacent light sources 120 can be increased, that is reduce the quantity of light source 120, thus save cost.
Fig. 3 illustrates the equivalent light path figure of the backlight module of Fig. 1.As shown in Figure 3, in some embodiments, light source 120 can be light emitting diode.The illuminated field shape of light emitting diode is the field shape of subtended angle about 120 degree, still have many veiling glares, therefore the many veiling glares sent by light source 120 cannot enter in light guide plate 200, and cause the decline of light coupling efficient because this shape is outside one's consideration at subtended angle 120.Therefore, optics can be utilized to regulate and control film 130 and the setting of light emitting structures 132, distribute the light that light source 120 sends, to promote light coupling efficient.In present pre-ferred embodiments, the thickness of optics regulation and control film 130 is less than 1mm.In addition, the relation of the optics regulation and control thickness t of the film 130 and equivalent diameter d of light emitting structures 132 is better for relational expression d/t<3.4.When meeting this relational expression, even if light source 120 is extremely near light emitting structures 132, even be positioned at the virtual location I in light emitting structures 132, the maximum subtended angle θ of the light shape that light source 120 can send towards light guide plate 200 also can because of the restriction being subject to above-mentioned equivalent diameter d and thickness t, and be less than 120 degree, therefore light coupling efficient can be improved.
For example, the simulation light chart of the comparative example that Fig. 4 illustrates to the 6th figure can be consulted, wherein, Fig. 4 be conventional light source module do not have optics regulation and control film 130 the light chart of simulating out, wherein curve C X1 represents the light shape that alongst X (can consult Fig. 2) distributes, and curve C Y1 represents the light shape distributed along short transverse Y (can consult Fig. 2).Fig. 5 adopts the light source module 100 of Fig. 2, and the ratio that the equivalent diameter d of light emitting structures 132 and optics regulate and control the thickness t of film 130 is when being 4.9, the light chart of simulating out, wherein curve C X2 and CY2 represents the light shape of alongst X and short transverse Y distribution respectively.Fig. 6 adopts the light source module 100 of Fig. 2, and the ratio that the equivalent diameter d of light emitting structures 132 and optics regulate and control the thickness t of film 130 is when being 1.3, the light chart of simulating out, wherein curve C X3 and CY3 represents the light shape of alongst X and short transverse Y distribution respectively.
As shown in figs. 4 and 5, the region that the region that curve C X2 is contained is contained than curve C X1 is narrower, that is the light shape representated by curve C X2 is more concentrated than the light shape representated by curve C X1.Therefore, the setting of optics regulation and control film 130 can make the light shape of light source module 100 on length direction X more concentrated.Similarly, the region that the region that curve C Y2 is contained is contained than curve C Y1 is narrower, that is the light shape representated by curve C Y2 is more concentrated than the light shape representated by curve C Y1.Therefore, optics regulation and control film 130 can make the light shape of light source module 100 on short transverse Y more concentrated.
As illustrated in figures 5 and 6, the region that the region that curve C X3 is contained is contained than curve C X2 is narrower, that is the light shape representated by curve C X3 is more concentrated than the light shape representated by curve C X2.Therefore, light source module 100 is less than 3.4 in the d/t value of optics regulation and control film 130 to be greater than 3.4 light shapes on length direction X compared to d/t value more concentrated.Similarly, the region that the region that curve C Y3 is contained is contained than curve C Y2 is narrower, that is the light shape representated by curve C Y3 is more concentrated than the light shape representated by curve C Y2.Therefore, light source module 100 is less than 3.4 in the d/t value of optics regulation and control film 130 to be greater than 3.4 light shapes on short transverse Y compared to d/t value more concentrated.
From Fig. 4 to 6, arrange optics regulation and control film 130 and the light shape of light source module 100 not only can be made to concentrate, when the value of d/t is less than 3.4, the effect of the light shape convergence of light source module 100 is better.Therefore, when equivalent diameter d and thickness t is satisfied in fact: during d/t<3.4, can light shape in active set.In addition, from Fig. 4 analog result, when adopting the conventional light source module without optics regulation and control film 130, if light source 120 sends the light of 1 watt, then light guide plate 200 can receive the light of 0.4856 watt, and its light coupling efficient is 48.56%; When the d/t value adopting optics regulation and control film 130 is the light source module 100 of 4.9, if light source 120 sends the light of 1 watt, then light guide plate 200 can receive the light of 0.4655 watt, and its light coupling efficient is 46.55%; When the value adopting d/t is the light source module 100 of 1.3, if light source 120 sends the light of 1 watt, then light guide plate 200 can receive the light of 0.5195 watt, and its light coupling efficient is 51.95%.It can thus be appreciated that, when equivalent diameter d and thickness t is satisfied in fact: during d/t<3.4, not only can restrain light shape and more effectively can improve light coupling efficient.
Please consult Fig. 1 again, reflection frames 110 section is the section shape of ㄈ font, to surround into space S.As shown in Figure 1, reflector 114 can comprise side plate 1142 and top board 1144, and side plate 1142 is connected between top board 1144 and loading plate 112, and top board 1144 is substantial parallel with loading plate 112, and both are all substantially perpendicular to side plate 1142, jointly to be formed the section shape of ㄈ font.But the section shape of reflection frames 110 can be other shapes, in the backlight module 2 of the second embodiment of the present invention and the backlight module 3 of the 3rd embodiment, respectively as shown in Figure 7, Figure 8, the reflector 114a/114b that reflection frames 110a/110b comprises and loading plate 112 accompany an angle.Both are difference, and the reflector 114a of the embodiment of Fig. 7 is an arc plate body, makes the section of reflection frames 110a be fan-shaped; The reflector 114b of the embodiment of Fig. 8 is the inclined-plane of an inclination, makes the section of reflection frames 110b triangular in shape.By the angle θ between adjustment reflector 114a/114b and loading plate 112, improve the light mixing effect of light in space S.Angle θ is best for being less than 90 degree.
Fig. 9 illustrates the profile of the backlight module 4 according to four embodiment of the invention.Difference between present embodiment and the first embodiment (as shown in Figure 1) is: the heat-conducting piece 700 of the backlight module 1 of the first embodiment is arranged to be carried on the back on frame 500, and only carries light guide plate 200 and do not carry light source module 100.The heat-conducting piece 700 of the backlight module 4 of present embodiment has a protuberance 710, protuberance 710 is arranged light guide plate 200, and protuberance 710 arranges light source module 100 relative on the part heat-conducting piece 700 of the side of light guide plate 200.In the better enforcement of the present invention, the better outside being arranged at loading plate 112 of circuit board 400 of light source 120.Thus, the heat energy produced when light source 120 is luminous can by circuit board 400 directly conduction to heat-conducting piece 700, then to conduct quick heat radiating to back of the body frame 500 in environment by heat-conducting piece 700.In some embodiments, the material of heat-conducting piece 700 can be the good metal of heat conduction as copper, aluminium etc., but the present invention is not as limit.
Figure 10 illustrates the profile of the backlight module 5 according to fifth embodiment of the invention.As shown in Figure 10, the Main Differences between present embodiment from aforementioned embodiments is to carry on the back the different of frame 500a.Furthermore, as shown in Figure 10, carry on the back frame 500a and there is base plate 501 and storage tank 502.Base plate 501 is connected with storage tank 502.Base plate 501 is in order to carry light guide plate 200.The accommodating light source module 100 of storage tank 502, and level height bottom storage tank 502 is lower than the level height of base plate 501.More particularly, the loading plate 112 of the reflection frames 110 of light source module 100 is arranged at the bottom of storage tank 502, and because the level height bottom storage tank 502 is lower than the level height of base plate 501, therefore, the level height of light guide plate 200 position can higher than the level height of light source 120 position, loading plate like this 112 and reflector 114 institute around space S expands increase mixed light space, and reduce the phenomenon bright secretly inequality.
Figure 11 illustrates the profile of the backlight module 6 according to sixth embodiment of the invention.Main Differences shown in present embodiment and Figure 10 between the 5th embodiment is: light guide plate 200a part is carried on base plate 501 and is partly exposed to the notch of storage tank 502, and the upright projection of part on the bottom of storage tank 502 that light guide plate 200a is exposed to the notch of storage tank 502 is overlapping with at least part of light source module 100.Thus, in optics regulation and control film 130, be recessed into a recess 135, and the section of optics regulation and control film 130 is that L shape is exposed to the part of the notch of storage tank 502 with accommodating light guide plate 200a, can reach the design of narrow frame simultaneously and have enough mixed light spaces.
Figure 12 illustrates the profile of the backlight module 7 according to seventh embodiment of the invention.Main Differences between present embodiment and aforementioned embodiments is: present embodiment adopts glue frame 600a as the reflection frames of light source module 100.Furthermore, glue frame 600a surrounds into space S '.This space S ' there is opening O '.Light source 120 be placed in glue frame 600a around space S ', and optics regulation and control film 130 cover opening O '.The space S that the light that light source 120 sends can be surrounded into by glue frame 600a ' wall reflection, and from optics regulation and control film 130 light emitting structures 132 pass space S '.Because present embodiment directly adopts glue frame 600a as reflection frames, therefore can save and additionally make the cost needed for reflection frames and the size reducing backlight module.
Figure 13 illustrates the profile of the backlight module 8 according to eighth embodiment of the invention.Main Differences between present embodiment from aforementioned embodiments is the different of light source 120a setting position.Furthermore, the loading plate 112 of reflection frames 110 comprises extension 1122, and extension 1122 is parallel to the incidence surface 210 of light guide plate 200, and light source 120a is arranged on the surface of extension 1122.Specifically, loading plate 112 section becomes L shape, jointly surrounds into space S with reflector 114, and this space S has opening O.Optics regulation and control film 130 covers opening O.When light source 120a be arranged at extension 1122 on the surface of opening O time, light extraction efficiency can be increased.In addition, in present embodiment, also heat-conducting piece 700 can be set between circuit board 400 and back of the body frame 500.Thus, the heat energy produced when light source 120 is luminous can conduct to heat-conducting piece 700 by circuit board 400, then is conducted to back of the body frame 500 by heat-conducting piece 700.
Figure 14 illustrates the profile of the backlight module 9 according to ninth embodiment of the invention.Main Differences between present embodiment and aforementioned embodiments is: the reflector 114c of the reflection frames 110c of present embodiment has optics control region 1146.Optics control region 1146 is just to incidence surface 210, and the scope of optics control region 1146 is corresponding with incidence surface 210, and the light penetration that the regional area of optics control region 1146 can send for light source 120 is to the incidence surface 210 of light guide plate 200.
Specifically, can consult Figure 15, this figure illustrates the light source module 100 of foundation Figure 14 and the stereogram of light guide plate 200.As shown in figure 15, optics control region 1146 has multiple light emitting structures 1147 and reflecting surface 1148.The light L that light source 120 produces by roundtrip in the space S of reflecting surface 1148 and reflector 114c, and can pass optics control region 1146 from light emitting structures 1147 place.Light emitting structures 1147 can be through hole, also non-through hole as structures such as impressions.With preferred embodiment, reflecting surface 1148 is formed at the side of optics control region 1146 towards light source 120; Multiple light emitting structures 1147 runs through optics control region 1146 respectively.
After the light L sent due to light source 120 is reflected by reflector 114c, then through the light emitting structures 1147 of optics control region 1146, therefore after caning be passed through reflection process at least one times from the some light L that light source 120 sends, just enter in light guide plate 200.Therefore, even if under the design of narrow frame, light source 120 is shorter to the distance of the light guide plate 200 being positioned at visible area, but the path penetrated to light guide plate 200 from light source 120 due to light L can be elongated, therefore can mixed light be beneficial to, the dark uneven phenomenon of light to reduce.
Above-mentioned light emitting structures 1147 is the form of circular perforations, but the shape of perforation is not limited to above-mentioned circle, and in other embodiments, can also be the quadrangle of ellipse, triangle and other patterns, even the shape of each light emitting structures 1147 be not identical.Wherein the area of each perforation all has equal area with a circle, namely has the equivalent diameter d waiting and herewith justify.As shown in figure 15, the equivalent diameter d of light emitting structures 1147 is directly proportional to the distance of light emitting structures 1147 to the projected position of immediate light source 120 on optics control region 1146.In other words, the light emitting structures 1147 more away from light source 120 has larger equivalent diameter d, and has the higher light amount of penetrating.Therefore, when light source 120 is luminous, even if the light that light source 120 sends is in traveling process, its energy can successively decrease, but because the light emitting structures 1147 more away from light source 120 allows more light to pass through, and allow less light to pass through the closer to the light emitting structures 1147 of light source 120, therefore the brightness of light source module 100 on alongst X can be comparatively even, and reduce the phenomenon of bright dark inequality.In addition, because the phenomenon of bright dark inequality can be lowered because of aforesaid way, therefore the spacing between two adjacent light sources 120 can be increased, that is reduce the quantity of light source 120, thus save cost.
Figure 16 illustrates the profile of the backlight module 10 according to tenth embodiment of the invention.As shown in figure 16, the Main Differences between present embodiment from aforementioned embodiments is to carry on the back the different of frame 500a.Furthermore, as shown in figure 16, carry on the back frame 500a and there is base plate 501 and storage tank 502.Base plate 501 is connected with storage tank 502.Base plate 501 can carry light guide plate 200.The accommodating light source module 100 of storage tank 502, and level height bottom storage tank 502 is lower than the level height of base plate 501.More particularly, light source 120 is carried on the bottom of storage tank 502, and because the level height bottom storage tank 502 is lower than the level height of base plate 501, therefore, the position at light guide plate 200 place higher than the position at light source 120 place, so can be beneficial to the height increasing reflection frames 110c, thus increase loading plate 112 and reflector 114c around the volume of space S, to expand mixed light space, and help to reduce the dark uneven phenomenon of light.
Figure 17 illustrates the profile of the backlight module 11 according to eleventh embodiment of the invention.Main Differences between present embodiment from Figure 16 illustrated embodiment is the different of light guide plate 200a position.Furthermore, light guide plate 200a part is carried on base plate 501 and is partly exposed to the notch of storage tank 502.More particularly, the light guide plate 200a of part is suspended on the opening of storage tank 502, and is positioned at directly over light source 120, also and, the light guide plate 200a of this part can cover at least part of light source 120.In other words, the upright projection of the light guide plate 200a of this part on the bottom of storage tank 502 and at least part of light source 120 overlap.Thus, the position of light source 120 can in be reduced to below light guide plate 200a, thus be beneficial to the design of narrow frame.In some embodiments, make light guide plate 200a be positioned at directly over light source 120 to be beneficial to, the reflector 114d of reflection frames 110d can comprise and inside contracts breach 111, with the accommodating part light guide plate 200a being suspended on storage tank 502.
Although the present invention discloses as above with embodiment; so itself and be not used to limit the present invention, anyly have the knack of this those skilled in the art, without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations, therefore protection scope of the present invention is when being as the criterion depending on the accompanying claim person of defining.
Claims (14)
1. a backlight module, is characterized in that, comprises:
One light guide plate, has an incidence surface, and this incidence surface has a length direction; And
One light source module, is arranged at by this incidence surface, comprises:
One reflection frames, has a loading plate and a reflector, and this loading plate and this reflector surround into a space, and this space has an opening, and this opening is towards this incidence surface;
One optics regulation and control film, is arranged at this loading plate and covers this opening, and this optics regulation and control film has multiple light emitting structures, the light amount of penetrating of described light emitting structures with the projected position of this light source immediate on this optics regulation and control film for starting point changes along this length direction; And
At least one light source, is arranged at this loading plate, and this light source sends a light, and this light is incident upon this reflector and reflexes to this optics regulation and control film, and this light of part is by the wherein at least one of described light emitting structures.
2. backlight module according to claim 1, is characterized in that, this optics regulation and control film comprises a first area and a second area, and described light emitting structures is arranged at this first area, and this first area is to should incidence surface.
3. backlight module according to claim 1, is characterized in that, the wherein at least one of described light emitting structures has an equivalent diameter, and this optics regulation and control film has a thickness, and wherein the ratio of this equivalent diameter and this thickness is less than 3.4 in fact.
4. backlight module according to claim 3, is characterized in that, the distance of the projected position that described equivalent diameter and described light emitting structures regulate and control on film to this light source immediate at this optics is directly proportional.
5. backlight module according to claim 1, it is characterized in that, more comprise a back of the body frame, this back of the body frame has a base plate and a storage tank, this base plate is connected with this storage tank, this base plate carries this light guide plate, this storage tank this light source module accommodating, and level height bottom this storage tank is lower than the level height of this base plate.
6. backlight module according to claim 5, it is characterized in that, this light guide plate part is carried on this base plate and is partly exposed to the notch of this storage tank, and the upright projection of this part being exposed to this notch of this light guide plate on the bottom of this storage tank is with this light source module is overlapping at least partly.
7. backlight module according to claim 1, is characterized in that, this optics regulation and control film and this reflector integrally formed.
8. backlight module according to claim 1, is characterized in that, this reflector and this loading plate accompany an angle, and this angle is less than 90 degree.
9. a backlight module, is characterized in that, comprises:
One light guide plate, has an incidence surface, and this incidence surface has a length direction; And
One light source module, is arranged at by this incidence surface, comprises:
One reflection frames, there is a loading plate and a reflector, this loading plate and this reflector surround into a space, this reflector has an optics control region, this optics control region is just to this incidence surface and the scope of this optics control region is corresponding with this incidence surface, this optics control region has multiple light emitting structures, the light amount of penetrating of described light emitting structures with the projected position of this light source immediate on this optics control region for starting point changes along this length direction; And
At least one light source, is arranged at this loading plate, and this light source sends a light, and this light is incident upon this reflector and reflexes to this optics control region, and this light of part is by the wherein at least one of described light emitting structures.
10. backlight module according to claim 9, is characterized in that, the wherein at least one of described light emitting structures has an equivalent diameter, and this optics control region has a thickness, and wherein the ratio of this equivalent diameter and this thickness is less than 3.4 in fact.
11. backlight modules according to claim 10, is characterized in that, described equivalent diameter is directly proportional to the distance of described light emitting structures to the projected position of this light source immediate on this optics control region.
12. backlight modules according to claim 9, it is characterized in that, more comprise a back of the body frame, this back of the body frame has a base plate and a storage tank, this base plate is connected with this storage tank, this base plate carries this light guide plate, this storage tank this light source module accommodating, and level height bottom this storage tank is lower than the level height of this base plate.
13. backlight modules according to claim 12, it is characterized in that, this light guide plate part is carried on this base plate and is partly exposed to the notch of this storage tank, and the upright projection of this part being exposed to this notch of this light guide plate on the bottom of this storage tank is with this light source module is overlapping at least partly.
14. backlight modules according to claim 9, is characterized in that, this reflector and this loading plate accompany an angle, and this angle is less than 90 degree.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW103131396A TWI622839B (en) | 2014-09-11 | 2014-09-11 | Backlight module |
| TW103131396 | 2014-09-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104456290A true CN104456290A (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410607017.3A Pending CN104456290A (en) | 2014-09-11 | 2014-10-30 | Backlight module |
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| Country | Link |
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| CN (1) | CN104456290A (en) |
| TW (1) | TWI622839B (en) |
Cited By (3)
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| CN109683398A (en) * | 2019-02-22 | 2019-04-26 | 惠州市华星光电技术有限公司 | Backlight module and display device |
| WO2019140923A1 (en) * | 2018-01-17 | 2019-07-25 | 京东方科技集团股份有限公司 | Optical cavity, optical system and display device |
| WO2024037476A1 (en) * | 2022-08-14 | 2024-02-22 | 湛玉文 | Reflective backlight module of liquid crystal display |
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| TWI588792B (en) | 2016-04-22 | 2017-06-21 | 友達光電股份有限公司 | Display device with narrow bezel design |
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Also Published As
| Publication number | Publication date |
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| TW201610523A (en) | 2016-03-16 |
| TWI622839B (en) | 2018-05-01 |
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Application publication date: 20150325 |