CN1758114A - Backlight module - Google Patents
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- CN1758114A CN1758114A CNA2004100808556A CN200410080855A CN1758114A CN 1758114 A CN1758114 A CN 1758114A CN A2004100808556 A CNA2004100808556 A CN A2004100808556A CN 200410080855 A CN200410080855 A CN 200410080855A CN 1758114 A CN1758114 A CN 1758114A
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Abstract
This invention relates to a backlight module composed of a LED, a light conduction plate and a phosphor, among which, the phosphor is set on the transmission path of the first ray emitted by the LED or in the plate and the first ray is used to excite one or more kinds of second ray from the phosphor, which mixes the two rays evenly and turns them to a white ray or mixes the second ray with multiple wavelengths into a white ray to generate a face light source with suitable color temperature.
Description
Technical field
The present invention relates to a kind of planar light source device (plane light source), particularly relate to a kind of backlight module (backlight module).
Background technology
Along with the significantly progressive and world-wide web of computing power, the high development of multimedia technology, the transmission of image information at present transfers digital transmission to by analog transmission mostly.In order to cooperate modern life pattern, it is frivolous that the volume of video or device for image day by day is tending towards.Though (Cathode RayTube, CRT) display still has its advantage to traditional cathode-ray tube (CRT), because the structure in its internal electron chamber, makes that display is bulky and takes up space, and have radiant rays hinder problems such as eye when image output.Therefore, plane formula display (the Flat Panel Display that cooperates photoelectric technology and semiconductor fabrication to be developed, FPD), LCD (Liquid Crystal Display for example, LCD), organic electro-luminescent display (Organic Electro-Luminescent Display, OELD) or plasma scope (Plasma Display Panel PDP), becomes the main flow of display product gradually.
LCD utilizes kenel can slightly be divided into three kinds of reflective liquid-crystal display (ReflectiveLCD), penetrating LCD (Transmissive LCD) and semi-penetrated semi-reflected liquid crystal displays according to its light source, wherein the penetration or the LCD of semi-penetration, semi-reflective mainly are made of a liquid crystal panel and a backlight module.Liquid crystal panel is made of two transparency carriers and the liquid crystal layer that is disposed between this two transparency carrier, and backlight module then is in order to provide this liquid crystal panel required area source, so that LCD reaches the effect of demonstration.In general, backlight module can be divided into straight-down negative (Direct-Type) and two kinds of side incident types haply.
Fig. 1 illustrates the diagrammatic cross-section into known direct type backlight module.Please refer to Fig. 1, known direct type backlight module 100 comprises a housing 110, several cold cathode fluorescent lamp pipe (Cold CathodeFluorescence Lamp, CCFL) 120, one diffuser plate (Diffusion Plate), 130 and one blooming piece 140.Wherein, cold cathode fluorescent lamp pipe 120 is to be disposed in the housing 110, and the light that each cold cathode fluorescent lamp pipe 120 is sent can be in housing 110 preliminary mixed light, afterwards just via diffuser plate 130 and blooming piece 140, to form a brightness than uniform surface light source.In addition, above-mentioned direct type backlight module 100 is to be disposed at liquid crystal panel 150 belows, so that area source is provided to liquid crystal panel 150.
Fig. 2 illustrates the diagrammatic cross-section into known side incident type backlight module.Please refer to Fig. 2, side incident type backlight module 200 is made of light guide plate 210, a cold cathode fluorescent lamp pipe 220, a reflex housing 230, blooming piece 240 and reflecting plate 260.Wherein, light guide plate 210 (being generally the wedge shape light guide plate) has a light entrance face 212, one a smooth diffusingsurface 214 and a light-emitting face 216.Cold cathode fluorescent lamp pipe 220 is light entrance face 212 sides that are disposed at light guide plate 210, and is positioned at reflex housing 230.Reflecting plate 260 is to be disposed on the light diffusingsurface 214 of light guide plate 210.
As shown in Figure 2, the light that cold cathode fluorescent lamp pipe 220 is sent can reflect through reflex housing 230 earlier or directly enter the light guide plate 210 from light entrance face 212, light is via the scattering of light diffusingsurface 214 and the reflection of reflector plate 260 afterwards, and is last just by light-emitting face 216 outgoing of light guide plate 210.Light by light-emitting face 216 outgoing of light guide plate 210 is to constitute an area source, and this area source can be again through the processing of blooming piece 240 and provide to liquid crystal panel 250.
Based on above-mentioned, backlight module adopts the cold cathode fluorescent lamp pipe as light source mostly, but in recent years because the lifting of photoelectricity combination technique level, (light emitting diode LED) has small size, low operating current, low power consumption, life-span length and plurality of advantages such as cost of manufacture is cheap to light emitting diode.Therefore use light emitting diode as light source, become the another kind of new selection of backlight module.
Fig. 3 illustrates and is the diagrammatic cross-section of known employing light emitting diode as the side incident type backlight module of light source.Please be simultaneously with reference to Fig. 2 and Fig. 3, the backlight module 200 ' among Fig. 3 is similar to the backlight module 200 among Fig. 2, precisely because the difference part is: the backlight module 200 ' among Fig. 3 is to adopt light emitting diode 280 as light source.It should be noted that backlight module 200 ' normally directly adopts white light emitting diode, or use a plurality of red light-emitting diodes, green light LED and blue light-emitting diode simultaneously with, in the hope of obtaining the white light source of suitable colour temperature as light source.
Fig. 4 A and Fig. 4 B illustrate the diagrammatic cross-section into different white light emitting diodes respectively.Please refer to Fig. 4 A, general common white light emitting diode 280 ' is that red light-emitting diode chip R, green light LED chip G and blue LED chip B are packaged in the single packing colloid 282, and ruddiness, green glow and the blue light sent by each light-emitting diode chip for backlight unit R, G, B are with the formation white light.
Then please refer to Fig. 4 B, white light emitting diode 280 " also can be that blue LED chip B and phosphor powder 284 are packaged in the single packing colloid 282.At this white light emitting diode 280 " in, it is blue-light excited further sending gold-tinted that phosphor powder 284 is suitable for the part sent by blue LED chip B, and behind gold-tinted and the abundant mixed light of blue light, can produce white light.
Hold above-mentioned, in the white light emitting diode 280 ' of Fig. 4 A, must use minimum light-emitting diode chip for backlight unit more than three, and each light-emitting diode chip for backlight unit drives individually normally, by the electric current of each light emitting diode of control feeding, to obtain the white light of suitable colour temperature.Therefore, the white light emitting diode 280 ' of this framework not only cost can't further reduce, and is also comparatively complicated on driving.On the other hand, at the white light emitting diode 280 of Fig. 4 B " in, the distributing homogeneity of phosphor powder 284 in packing colloid 282 will directly have influence on the colour temperature of the white light that is produced, and its control aspect making is difficult for.Moreover, because this framework needs the outer fund of amount paid on the implementation, so white light emitting diode 280 " on manufacturing cost, also can't reduce effectively.
Summary of the invention
The technical matters that the present invention solves provides a kind of backlight module that can effectively reduce cost of manufacture.
For solving the problems of the technologies described above, the present invention proposes a kind of backlight module, comprises a light emitting diode, a light guide plate and a phosphor body, and wherein light emitting diode is suitable for sending one first light.In addition, light emitting diode has a light-emitting face, and this light-emitting face has one first smooth diffusing surface.Light guide plate then is disposed at by the light emitting diode, and phosphor body is to be disposed between light emitting diode and the light guide plate.In addition, phosphor body is positioned on the bang path of first light that light emitting diode sends, the first smooth diffusing surface with the diffusion of first light after, first the exciting of light after phosphor body is spread and send one second light.
In one embodiment of the invention, light emitting diode for example is a blue light diode or a blue light laser diode, and first light that light emitting diode sent is blue light.In addition, above-mentioned phosphor body comprises a gold-tinted fluorescent material, so second light that phosphor body is subjected to being sent after first light (blue light) excites is gold-tinted.After gold-tinted that blue light that light emitting diode sent and phosphor body are subjected to being sent after blue-light excited fully mixes, can obtain the white light of suitable colour temperature.Moreover above-mentioned phosphor body also can for example comprise a green glow fluorescent material and a ruddiness fluorescent material, so second light that phosphor body is subjected to being sent after first light (blue light) excites is green glow and ruddiness.After blue light that light emitting diode sent and phosphor body are subjected to the green glow that sent after blue-light excited and ruddiness and fully mix, can obtain the white light of suitable colour temperature.
In one embodiment of the invention, light emitting diode for example is a non-visible light light emitting diode (as ultraviolet light-emitting diodes etc.), and first light that light emitting diode sent is non-visible light (as ultraviolet light).In addition, phosphor body comprises a ruddiness fluorescent material, a green glow fluorescent material and a blue light fluorescent material, so second light that phosphor body is subjected to being sent after first light (blue light) excites comprises ruddiness, green glow and blue light.After ruddiness, green glow and blue light that phosphor body is subjected to being sent after blue-light excited fully mix, can obtain the white light of suitable colour temperature.
In one embodiment of the invention, ruddiness fluorescent material, blue light fluorescent material and green glow fluorescent material for example are to be that array is arranged, mutual storehouse or be mixed with each other on the light guide plate surface or inner each other.
In one embodiment of the invention, light guide plate for example has a light entrance face, a smooth diffusingsurface and a light-emitting face.
In one embodiment of the invention, phosphor body for example is disposed on the light entrance face of light guide plate.In addition, light guide plate can also have second a smooth diffusing surface that is positioned on the light entrance face, and phosphor body for example is disposed on the surface of second light diffusion.
In one embodiment of the invention, light guide plate for example has a groove, and this groove for example is to be positioned on the light entrance face, and phosphor body for example is disposed at its inside.In addition, above-mentioned groove can also have one the 3rd smooth diffusing surface.
In one embodiment of the invention, backlight module for example comprises also that one is disposed at cavity body structure or the colloid on the light entrance face of light guide plate, to hold phosphor body or phosphor body to be bonded on the light entrance face of light guide plate.
In one embodiment of the invention, light guide plate for example has first a phosphor body coated face that is positioned at the offside of light entrance face, and phosphor body is disposed on the first phosphor body coated face of light guide plate.
In one embodiment of the invention, phosphor body for example is disposed on the light-emitting face of light guide plate, or is disposed in the light guide plate.In addition, phosphor body for example is to be uniformly distributed in the light guide plate, or is distributed in the regional area in the light guide plate.
In one embodiment of the invention, light guide plate for example has second a phosphor body coated face adjacent with light entrance face, and phosphor body for example is disposed on the second phosphor body coated face of light guide plate.
In one embodiment of the invention, backlight module for example also comprise one be disposed at light guide plate and light emitting diode between prism, and phosphor body is disposed in the prism.
In one embodiment of the invention, backlight module for example also comprises a reflector plate, and wherein light emitting diode is positioned at the below of light guide plate, and reflector plate is disposed at by light guide plate and the light emitting diode.Phosphor body then is disposed on this reflector plate or between this reflector plate and the light emitting diode.In addition, above-mentioned reflector plate for example has a reflecting curved surface or most the planes of reflection that are connected with each other.
In one embodiment of the invention, backlight module for example also comprises a light-passing board, and it is disposed between light emitting diode and the light guide plate, and phosphor body is disposed in the light-passing board.
In one embodiment of the invention, backlight module for example also comprises at least one blooming piece, and it is disposed at the light-emitting face top of light guide plate, and phosphor body is disposed in the blooming piece or a surface of blooming piece on.And this blooming piece for example comprises diffusion sheet and/or brightening piece.
In one embodiment of the invention, backlight module for example also comprises a reflector plate, and it is disposed at the light diffusingsurface below of light guide plate, and phosphor body is disposed on the reflector plate.
In one embodiment of the invention, backlight module for example also comprises a reflection-type light guide plate, and wherein light emitting diode is positioned at the below of light guide plate, and the reflection-type light guide plate is disposed at by light emitting diode and the light guide plate, and phosphor body then is disposed in the reflection-type light guide plate.
In one embodiment of the invention, backlight module for example also comprises a light-passing board and a reflection-type light guide plate.Wherein, light-passing board is disposed between light emitting diode and the light guide plate, and phosphor body is disposed in the light-passing board.The reflection-type light guide plate then is disposed at by light-passing board and the light guide plate, and light emitting diode is positioned at the below of light guide plate.
The present invention also proposes a kind of backlight module, comprises a light emitting diode, a light guide plate and a phosphor body.Wherein, light emitting diode is suitable for sending one first light, and light guide plate is disposed at by the light emitting diode.Phosphor body then is disposed in the light guide plate, and wherein phosphor body is to be subjected to the exciting to send one second light of first light.
In one embodiment of the invention, light emitting diode for example is a blue light diode or a blue light laser diode, and first light that light emitting diode sent is blue light.In addition, above-mentioned phosphor body comprises a gold-tinted fluorescent material, so second light that phosphor body is subjected to being sent after first light (blue light) excites is gold-tinted.After gold-tinted that blue light that light emitting diode sent and phosphor body are subjected to being sent after blue-light excited fully mixes, can obtain the white light of suitable colour temperature.Moreover above-mentioned phosphor body also can for example comprise a green glow fluorescent material and a ruddiness fluorescent material, so second light that phosphor body is subjected to being sent after first light (blue light) excites is green glow and ruddiness.After blue light that light emitting diode sent and phosphor body are subjected to the green glow that sent after blue-light excited and ruddiness and fully mix, can obtain the white light of suitable colour temperature.
In one embodiment of the invention, light emitting diode for example is a non-visible light light emitting diode (as ultraviolet light-emitting diodes etc.), and first light that light emitting diode sent is non-visible light (as ultraviolet light).In addition, phosphor body comprises a ruddiness fluorescent material, a green glow fluorescent material and a blue light fluorescent material, so second light that phosphor body is subjected to being sent after first light (blue light) excites comprises ruddiness, green glow and blue light.After ruddiness, green glow and blue light that phosphor body is subjected to being sent after blue-light excited fully mix, can obtain the white light of suitable colour temperature.
In one embodiment of the invention, ruddiness fluorescent material, blue light fluorescent material and green glow fluorescent material for example are to be that array is arranged, mutual storehouse or be mixed with each other on the light guide plate surface or inner each other.
In one embodiment of the invention, light guide plate for example has a light entrance face, a smooth diffusingsurface and a light-emitting face.
In one embodiment of the invention, phosphor body for example is disposed in the light guide plate and is adjacent on the light entrance face of light guide plate.In addition, light guide plate for example can also have second a smooth diffusing surface that is positioned on its light entrance face, and phosphor body then disposes in the light guide plate and is adjacent to the second smooth diffusing surface of light guide plate.
In one embodiment of the invention, phosphor body for example is uniformly distributed in the light guide plate.
The present invention is disposed at phosphor body on the bang path of first light that light emitting diode sends, or phosphor body is disposed at light guide plate inside, and utilizes the first short light of wavelength to make phosphor body send wavelength second light long than first light.First light is evenly mixed with second light and obtain the white light of a suitable colour temperature.In addition, the present invention also can utilize the first short light of wavelength to make phosphor body send multi-wavelength's second light long than first light, and second light of these different wave lengths is evenly mixed to obtain the white light of a suitable colour temperature.In sum, the present invention adopts and is integrated on the light guide plate surface or inner phosphor body in short wavelength's the light emitting diode collocation, producing the white light of suitable colour temperature, and more or less freely on making.
Description of drawings
Fig. 1 illustrates the diagrammatic cross-section into known direct type backlight module.
Fig. 2 illustrates the diagrammatic cross-section into known side incident type backlight module.
Fig. 3 illustrates and is the diagrammatic cross-section of known employing light emitting diode as the side incident type backlight module of light source.
Fig. 4 A and Fig. 4 B illustrate the diagrammatic cross-section into different white light emitting diodes respectively.
Fig. 5 and Fig. 6 illustrate respectively to according to looking and schematic side view on the first embodiment of the invention backlight module.
Fig. 7 and Fig. 8 illustrate respectively to according to looking and schematic side view on the second embodiment of the invention backlight module.
Fig. 9 illustrates and is the configuration schematic diagram according to second embodiment of the invention ruddiness fluorescent material, green glow fluorescent material and blue light fluorescent material.
Figure 10 illustrates to according to looking synoptic diagram on the third embodiment of the invention light emitting diode.
Figure 11 A, Figure 11 B and Figure 11 C illustrate to according to looking synoptic diagram on the fourth embodiment of the invention backlight module.
Figure 12 A and Figure 12 B illustrate to according to looking synoptic diagram on the fifth embodiment of the invention backlight module.
Figure 13 A and Figure 13 B illustrate to according to looking and schematic side view on the sixth embodiment of the invention backlight module.
Figure 14 A-14F illustrates to according to looking synoptic diagram on the seventh embodiment of the invention backlight module.
Figure 15 to Figure 21 illustrates to according to looking synoptic diagram on the eighth embodiment of the invention backlight module.
Figure 22 and Figure 23 illustrate and are the schematic side view according to the ninth embodiment of the invention backlight module.
Figure 24 and Figure 25 illustrate and are the schematic side view according to the tenth embodiment of the invention backlight module.
Figure 26 is the schematic side view according to the tenth embodiment of the invention backlight module with illustrating.
Figure 27 illustrates and is the side cutaway view according to the eleventh embodiment of the invention backlight module.
The figure number explanation
100: direct type backlight module 110: housing
120: cold cathode fluorescent lamp pipe 130: diffuser plate
140: blooming piece 150: liquid crystal panel
200: side incident type backlight module 200 ': backlight module
210: light guide plate 212: light entrance face
214: light diffusingsurface 216: light-emitting face
220: cold cathode fluorescent lamp pipe 230: reflex housing
240: blooming piece 250: liquid crystal panel
260: reflecting plate 280: light emitting diode
280 ': white light emitting diode 280 ": white light emitting diode
282: packing colloid 284: phosphor powder
300: backlight module 310: light emitting diode
314: the first smooth diffusing surfaces of 312: the first light-emitting faces
320: light guide plate 322: the light diffusingsurface
324: light entrance face 326: light-emitting face
330: phosphor body 400: backlight module
410: 412: the first light-emitting faces of light emitting diode
414: the first smooth diffusingsurfaces 420: light guide plate
422: light diffusingsurface 424: light entrance face
426: light-emitting face 430: phosphor body
430a: ruddiness fluorescent material 430b: green glow fluorescent material
430c: blue light fluorescent material 500: backlight module
510: light emitting diode 520: light guide plate
522a: light entrance face 522b: light-emitting face
522c: 523: the second smooth diffusing surfaces of light diffusingsurface
524: groove 524 ': groove
525: the three smooth diffusing surfaces 526: cavity body structure
527: 528: the first phosphor body coated faces of colloid
529: the second phosphor body coated faces 530: phosphor body
540: prism 550: reflector plate
552: reflecting curved surface 554: the plane of reflection
560: light-passing board 570: blooming piece
580: the reflection-type light guide plate
Embodiment
First embodiment
Fig. 5 and Fig. 6 illustrate respectively to according to looking and schematic side view on the first embodiment of the invention backlight module.Please jointly with reference to Fig. 5 and Fig. 6, the backlight module 300 of present embodiment comprises a light emitting diode 310, a light guide plate 320 and a phosphor body 330.Wherein, light emitting diode 310 is suitable for sending one first light, and light emitting diode 310 has one first light-emitting face, 312, the first smooth diffusing surfaces 314 and then is disposed on first light-emitting face 312.It is other that light guide plate 320 is disposed at light emitting diode 310.330 of phosphor bodies are disposed between light emitting diode 310 and the light guide plate 320, and be positioned on the bang path of first light, wherein the first smooth diffusing surface 314 is after first light diffusion, first the exciting of light after phosphor body 330 can be spread and send second light.Geometry external form that it should be noted that the first smooth diffusing surface 314 for example is zigzag or other shape that light can be spread.In other words, the scattering degree of the present embodiment light that can the geometric shape control light emitting diode 310 by the first smooth diffusing surface 314 be sent.In the present embodiment, light guide plate 320 for example has a smooth diffusingsurface 322, a light entrance face 324 and a light-emitting face 326.
In the present embodiment, light emitting diode 310 for example is a blue light-emitting diode or blue light laser diode (laser diode), and phosphor body 330 for example is made up of the gold-tinted fluorescent material.In other words, after phosphor body 330 is subjected to exciting of blue light that blue light-emitting diode or blue light laser diode 310 sent, can send gold-tinted, and be mixed into white light equably at the inner blue lights that sent with blue light-emitting diode or blue light laser diode 310 of light guide plate 320 itself, last just from light-emitting face 326 outgoing of light guide plate 320.
In the present embodiment, above-mentioned phosphor body 330 also can for example be made up of green glow fluorescent material and ruddiness fluorescent material.In other words, after phosphor body 330 is subjected to exciting of blue light that blue light-emitting diode or blue light laser diode 310 sent, can send green glow and ruddiness, and be mixed into white light equably at the inner blue lights that sent with blue light-emitting diode or blue light laser diode 310 of light guide plate 320 itself, last just from light-emitting face 326 outgoing of light guide plate 320.
Second embodiment
Fig. 7 and Fig. 8 illustrate respectively to according to looking and schematic side view on the second embodiment of the invention backlight module.Please jointly with reference to Fig. 7 and Fig. 8, the backlight module 400 of present embodiment comprises a light emitting diode 410, a light guide plate 420 and multiple phosphor body 430.Wherein, light emitting diode 410 is suitable for sending one first light, and light emitting diode 410 has one first light-emitting face 412.And the first smooth diffusing surface 414 is to be disposed on first light-emitting face 412.Light guide plate 420 is to be disposed at light emitting diode 410 sides.Each phosphor body 430 is to be disposed between light emitting diode 410 and the light guide plate 420, and be positioned on the bang path of first light wherein the first smooth diffusing surface 414 with the diffusion of first light after, first the exciting of light after phosphor body can be spread and send second light.Geometry external form that it should be noted that the first smooth diffusing surface 414 for example is zigzag or other shape that light can be spread.In other words, the scattering degree of the present embodiment light that can the geometric shape control light emitting diode 410 by the first smooth diffusing surface 414 be sent.In the present embodiment, light guide plate 420 for example has a smooth diffusingsurface 422, a light entrance face 424 and a light-emitting face 426.
In the present embodiment, light emitting diode 410 for example is a non-visible light light emitting diode 410, preferable for example is ultraviolet light-emitting diodes (UV LED), and phosphor body 430 for example is made of jointly ruddiness fluorescent material 430a, green glow fluorescent material 430b and blue light fluorescent material 430c.In other words, after ruddiness fluorescent material 430a, green glow fluorescent material 430b and blue light fluorescent material 430c are subjected to exciting of blue light that non-visible light light emitting diode 410 sent, can send ruddiness, green glow and blue light respectively, and these ruddiness, green glow and blue light just can be mixed into white light equably in light guide plate 420 inside, and be last just from light-emitting face 426 outgoing of light guide plate 420.
Fig. 9 and Figure 10 illustrate and are the configuration schematic diagram according to second embodiment of the invention ruddiness fluorescent material, green glow fluorescent material and blue light fluorescent material.Please be simultaneously with reference to Fig. 7, Fig. 9 and Figure 10, ruddiness fluorescent material 430a, the blue light fluorescent material 430b of present embodiment and green glow fluorescent material 430c are arranged on the surface of light guide plate 420 or inner (being illustrated as Fig. 7) in the array mode.In addition, ruddiness fluorescent material 430a, the blue light fluorescent material 430b of present embodiment and green glow fluorescent material 430c are stacked over light guide plate 420 surfaces to go up or inner (illustrating as Fig. 9) each other alternately, and do not limit the stacking order and the position of each fluorescent material layer.Moreover ruddiness fluorescent material 430a, the blue light fluorescent material 430b of present embodiment and green glow fluorescent material 430c are mixed with each other to go up or inner (illustrating as Figure 10) in light guide plate 420 surfaces
In above-mentioned first embodiment and second embodiment, mainly be that first light that radiothermy long hair optical diode is sent excites phosphor powder, to produce second light of suitable wavelength, and mixing by first light and second light, or second light of different wave length is mixed with each other, to produce white light.Yet above-mentioned is not in order to limit scope of the present invention, below will be described in detail at the kenel of light-emitting diode chip for backlight unit, the kenel of light guide plate, the distributing position of phosphor body etc.
The 3rd embodiment
Figure 11 A, Figure 11 B and Figure 11 C illustrate to according to looking synoptic diagram on the third embodiment of the invention backlight module.Please earlier with reference to Figure 11 A, the light guide plate 520 of present embodiment for example has one second smooth diffusing surface 523 on its light entrance face 522a.In addition, phosphor body 530 for example is to coat on the second smooth diffusing surface 523 of light guide plate 520.Because the second smooth diffusing surface 523 of light guide plate 520 has zigzag (illustrating as Figure 11 A) or other is beneficial to the geometric shape that light is spread, therefore can promote the mixed light effect of light guide plate 520 effectively.On the other hand, second of the light guide plate 520 smooth diffusing surface 523 can also be promoted the adhesive ability between phosphor body 530 and the light guide plate 520.
Then please refer to Figure 11 B, the light guide plate 520 of present embodiment also can form a groove 524 on light entrance face 522a, and phosphor body 530 for example is to coat in this groove 524.In the present embodiment, groove 524 for example is the semi-circular recesses or the groove of other geometric configuration.By Figure 11 B as can be known, groove 524 not only helps phosphor body 530 in light guide plate 520 lip-deep coatings, and can further increase the total amount of phosphor body 530 coatings.In other words, when the fabricator need be coated with relatively large phosphor body 530 in light guide plate 520, this design can be satisfied its demand.
Then please refer to Figure 11 C, the light guide plate 520 of present embodiment also can form a groove 524 ' on light entrance face 522a, and go up formation one the 3rd smooth diffusing surface 525 in this groove 524 ', phosphor body 530 then is on the 3rd smooth diffusing surface of coating in the groove 524 ' 525.So design not only can increase phosphor body 530 and coats total amount on the light guide plate 520, and can promote phosphor body 530 and light guide plate 520 between adhesive ability.
The 4th embodiment
Figure 12 A and Figure 12 B illustrate to according to looking synoptic diagram on the fifth embodiment of the invention backlight module.At first please refer to Figure 12 A, the backlight module 500 of present embodiment for example also comprises a cavity body structure 526, and this cavity body structure 526 for example is to be disposed on the surface of light guide plate 520, and between light guide plate 520 and light emitting diode 510.Particularly, cavity body structure 526 is the phosphor bodies 530 in order to hold capacity.
Then please refer to Figure 12 B, the backlight module 500 of present embodiment for example also comprises colloid 527, and this colloid 527 is in order to phosphor body 530 is bonded on the second smooth diffusing surface 523.In the present embodiment, colloid 527 is preferably the employing transparent material or other can allow the glue material of light penetration.
The 5th embodiment
Figure 13 A and Figure 13 B illustrate to according to looking and schematic side view on the sixth embodiment of the invention backlight module.At first please refer to Figure 13 A, the backlight module 500 of present embodiment for example has one first phosphor body coated face 528, and this one first phosphor body coated face 528 is the offsides that are positioned at light entrance face 522a.Change speech, phosphor body 530 is to be coated on the one first phosphor body coated face 528 of light guide plate 520.Particularly, when light emitting diode 510 is a blue light-emitting diode or a blue light laser diode, first light (blue light) that light emitting diode 510 is sent can be introduced in the light guide plate 520, then just excite the phosphor body of coating on the first phosphor body coated face 528 530, to produce second light (gold-tinted).
Then please refer to Figure 13 B, present embodiment also can be coated on phosphor body 530 on the light-emitting face 522b of light guide plate 520.Similarly, when light emitting diode 510 is a blue light-emitting diode or a blue light laser diode, first light (blue light) that light emitting diode 510 is sent can be introduced in the light guide plate 520, then just excite the phosphor body of coating on the light-emitting face 522b 530, to produce second light (gold-tinted).
The 6th embodiment
The backlight module 500 of present embodiment mainly is disposed at phosphor body 530 in the light guide plate 520, is different from the design of the 3rd, the 4th and the 5th embodiment.
Figure 14 A-14F illustrates to according to looking synoptic diagram on the seventh embodiment of the invention backlight module.Please be simultaneously with reference to Figure 14 A and Figure 14 B, the phosphor body 530 of present embodiment for example is in the regional area that is distributed in the light guide plate 520 (illustrating as Figure 14 A), the distribution range of this regional area is looked closely fabricator's demand and different variations can be arranged with the position, and the present invention does not do further qualification at this.In addition, the phosphor body 530 of present embodiment also can be evenly distributed in the light guide plate 520 and (illustrate as Figure 14 B), only the density that distributes of phosphor body 530 and total amount also visual fabricator's demand make suitable change, the present invention does not do further qualification equally at this.
Then please also refer to Figure 14 C, 14D and 14E, the phosphor body 530 of Figure 14 C for example is to be disposed in the light guide plate 520 in the mode that array is arranged, and is adjacent to the second smooth diffusingsurface 523 on the light entrance face 522a.Wherein, the geometry external form of light emitting diode 510 is not limited to and must has one first smooth diffusing surface.In addition, the geometry external form that can be found phosphor body 530 by 14D also can be strip, and be adjacent to the second smooth diffusingsurface 523 (being illustrated in Figure 14 D) on the light entrance face 522a, particularly, first light (as ultraviolet light) that light emitting diode 510 is sent can be by second smooth diffusing surface 523 diffusions, the phosphor bodies 530 that first light after the diffusion will be disposed in the light guide plate 520 inspire second light (as ruddiness, green glow and blue light), and second light that is inspired is evenly mixing and obtain the suitable white light of a colour temperature in light guide plate 520 in.
Please be simultaneously with reference to Figure 14 C, Figure 14 E and Figure 14 F.Phosphor body 530 for example can be made up of with the array arrangement mode ruddiness fluorescent material 530a, blue light fluorescent material 530b and green glow fluorescent material 530c among Figure 14 C, and is positioned at light guide plate 520 inside.Can find by Figure 14 E and Figure 14 F, ruddiness fluorescent material 530a, blue light fluorescent material 530b and green glow fluorescent material 530c are stacked over light guide plate 520 inside (illustrating as Figure 14 E) each other alternately, and do not limit the stacking order and the position of each fluorescent material layer.Moreover, for example can also be to be mixed with each other in light guide plate 520 inside (illustrating) as Figure 14 F.
The 8th embodiment
Figure 15 to Figure 21 illustrates to according to looking synoptic diagram on the eighth embodiment of the invention backlight module.At first please refer to Figure 15, in the backlight module 500 of present embodiment, light guide plate 520 has second a phosphor body coated face 529 adjacent with light entrance face 522a, and phosphor body 530 is to be disposed on the second phosphor body coated face 529.For first light that light emitting diode 510 is sent can excite phosphor body 530, light emitting diode 510 is the belows that are disposed at light guide plate 520.
Then ask the while with reference to Figure 16, Figure 17 and Figure 18, can know by Figure 16 and learn that the backlight module 500 of present embodiment also can comprise a prism 540, and for example is coated with phosphor body 530 in this prism 540.In addition, by Figure 17 and Figure 18 as can be known, the prism 540 of present embodiment also can use other member that can carry phosphor body 530 to replace, as optical modules such as reflector plate 550 (being illustrated among Figure 17 and Figure 18), lens.In the present embodiment, reflector plate 550 for example has reflecting curved surface 552 (being illustrated in Figure 17), or has most the planes of reflection 554 (Figure 18 only shows two planes of reflection).Phosphor body 530 that it should be noted that present embodiment is to coat on the reflecting curved surface 552 (being illustrated in Figure 17) or the plane of reflection 554 (being illustrated in Figure 18) of reflector plate 550.
Then please refer to Figure 19 and Figure 20, the difference of itself and Figure 17 and Figure 18 is the position at phosphor body 530 places.The phosphor body 530 of present embodiment also can be arranged between light emitting diode 510 and the reflector plate 550 except on the reflecting curved surface or the plane of reflection that can coat reflector plate 550.For example.Phosphor body 530 for example can be coated earlier on the transparent base, the transparent base that again this is coated with phosphor body 530 be arranged at light emitting diode 510 and reflector plate 550 between.Certainly, the present invention does not limit this embodiment, any phosphor body 530 can be arranged at light emitting diode 510 and reflector plate 550 between embodiment, all should be in category of the present invention.
Please refer to Figure 21, reflector plate 550 for example can also be disposed at the light diffusingsurface 522c below of light guide plate 520.By phosphor body 530 is disposed on the reflector plate 550, first light that light emitting diode 510 is sent can inspire second light from phosphor body 530, and wherein phosphor body 530 for example is to be disposed on the reflector plate 550.
The 9th embodiment
Figure 22 and Figure 23 illustrate and are the schematic side view according to the ninth embodiment of the invention backlight module.Please refer to Figure 22, the backlight module 500 of present embodiment also can comprise a light-passing board 560, and phosphor body 530 then is disposed in the light-passing board 560.For first light that light emitting diode 510 is sent can excite phosphor body 530, light-passing board 560 is to be disposed between light emitting diode 510 and the light guide plate 520.Particularly, when light emitting diode 510 is a blue light-emitting diode or a blue light laser diode, first light (blue light) that light emitting diode 510 is sent can excite the phosphor body 530 that is arranged in light-passing board 560 earlier, to produce second light (gold-tinted), then just enter in the light guide plate 520.
Then please refer to Figure 23, the phosphor body 530 of present embodiment can also be disposed at a surface of light-passing board 560.Similarly, when light emitting diode 510 is a blue light-emitting diode or a blue light laser diode, first light (blue light) that light emitting diode 510 is sent can excite the phosphor body 530 on a surface that is positioned at light-passing board 560 earlier, to produce second light (gold-tinted), then just enter in the light guide plate 520.
The tenth embodiment
Figure 24 and Figure 25 illustrate and are the schematic side view according to the tenth embodiment of the invention backlight module.Please refer to Figure 24, backlight module 500 can also comprise a blooming piece 570, and phosphor body 530 is surfaces that are disposed at blooming piece 570.For first light that light emitting diode 510 is sent can excite phosphor body 530, blooming piece 570 is the light-emitting face 522b tops that are disposed at light guide plate 520.Particularly, when light emitting diode 510 is a blue light-emitting diode or a blue light laser diode, first light (blue light) that light emitting diode 510 is sent can be introduced in the light guide plate 520 and in light-emitting face 522b outgoing, first light can excite the phosphor body 530 that is positioned at blooming piece 570 1 surfaces afterwards, to produce second light (gold-tinted).
Then please refer to Figure 25, phosphor body 530 can also be disposed in the blooming piece 570.Similarly, when light emitting diode 510 is a blue light-emitting diode or a blue light laser diode, first light (blue light) that light emitting diode 510 is sent can be introduced in the light guide plate 520 and in light-emitting face 522b outgoing, first light can excite the phosphor body 530 that is arranged in blooming piece 570 afterwards, to produce second light (gold-tinted).In addition, the blooming piece 570 of Figure 24 and Figure 25 can for example be diffusion sheet and/or brightening piece.
The 11 embodiment
Figure 26 illustrates and is the schematic side view according to the tenth embodiment of the invention backlight module.Please refer to Figure 26, backlight module 500 can also comprise a reflection-type light guide plate 580, and phosphor body 530 is to be disposed in the reflection-type light guide plate 580.For first light that light emitting diode 510 is sent can excite phosphor body 530, light emitting diode 510 is the belows that are disposed at light guide plate 520, and reflection-type light guide plate 580 is to be disposed at light emitting diode 510 and light guide plate 520 sides.Particularly, when light emitting diode 510 is a blue light-emitting diode or a blue light laser diode, first light (blue light) that light emitting diode 510 is sent can be introduced in the reflection-type light guide plate 580, and excite the phosphor body 530 that is disposed in the reflection-type light guide plate 580, to produce second light (gold-tinted).Through reflection-type light guide plate 580 and light guide plate 520 well-mixed white lights by light-emitting face 522b outgoing.
The 12 embodiment
Figure 27 illustrates and is the side cutaway view according to the eleventh embodiment of the invention backlight module.Please refer to Figure 27, backlight module 500 can also comprise a light-passing board 560 and 1 reflection-type light guide plate 580, and wherein phosphor body 530 is to be disposed in the light-passing board 560.For the 1st light that light emitting diode 510 is sent can excite phosphor body 530, light-passing board 560 is to be disposed between light emitting diode 510 and the light guide plate 520, light emitting diode 510 is positioned at light guide plate 520 belows, and reflection-type light guide plate 580 is to be formulated in light-passing board 560 and light guide plate 520 sides.Particularly, when light emitting diode 510 is a blue light-emitting diode or a blue light laser diode, first light (blue light) that light emitting diode 510 is sent can excite the phosphor body 530 that is disposed in the light-passing board 560 earlier, producing second light (gold-tinted), and after reflection-type light guide plate 580 and light guide plate 520 well-mixed white lights by light-emitting face 522b outgoing.
In sum, backlight module of the present invention has following advantage:
1. the present invention can be disposed at phosphor body on the bang path of first light that light emitting diode sends, or phosphor body is disposed at light guide plate inside, utilize the first short light of wavelength that phosphor body is inspired wavelength second light long than first light, and first light mixed equably with second light and obtain a white light backlight.
2. the present invention can utilize the first short light of wavelength simultaneously phosphor body to be inspired multi-wavelength's second light long than first light, and even mixing of these second light obtained a white light backlight.
3. the present invention must not adopt ruddiness, green glow, blue LED chip can effectively produce white light simultaneously, still can effectively reduce in manufacturing cost, and also comparatively simple on driving.
Though the present invention with preferred embodiment openly as above; right its is not in order to limiting the present invention, anyly is familiar with this operator, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (42)
1. a backlight module is characterized in that, comprising:
One light emitting diode is suitable for sending one first light, and wherein this light emitting diode has a light-emitting face, and this light-emitting face of this light emitting diode is one first smooth diffusing surface;
One light guide plate is disposed at by this light emitting diode; One phosphor body, be disposed between this light emitting diode and this light guide plate, and be positioned on the bang path of this first light, wherein this first smooth diffusing surface is with the diffusion of this first light, and this phosphor body is this first exciting of light after being spread and send one second light.
2. backlight module according to claim 1 is characterized in that this light emitting diode comprises a blue light diode, and this first light is blue light.
3. backlight module according to claim 2 is characterized in that, this phosphor body comprises a gold-tinted fluorescent material, and this second light is gold-tinted.
4. backlight module according to claim 2 is characterized in that, this phosphor body comprises a green glow fluorescent material and a ruddiness fluorescent material, and this second light comprises green glow and ruddiness.
5. backlight module according to claim 2 is characterized in that, this blue light-emitting diode comprises a blue light laser diode.
6. backlight module according to claim 1 is characterized in that, this light emitting diode comprises a non-visible light light emitting diode, and this first light is non-visible light.
7. backlight module according to claim 6 is characterized in that, this phosphor body comprises a ruddiness fluorescent material, a blue light fluorescent material and a green glow fluorescent material, and this second light comprises ruddiness, blue light and green glow.
8. backlight module according to claim 6 is characterized in that, this ruddiness fluorescent material in this phosphor body, this blue light fluorescent material and this green glow fluorescent material are to be that array is arranged, mutual storehouse or be mixed with each other each other.
9. backlight module according to claim 6 is characterized in that this light emitting diode comprises a ultraviolet light-emitting diodes.
10. backlight module according to claim 1 is characterized in that, this light guide plate has a light entrance face, a smooth diffusingsurface and a light-emitting face.
11. backlight module according to claim 10 is characterized in that, this phosphor body is to be disposed on this light entrance face of this light guide plate.
12. backlight module according to claim 11 is characterized in that, this light guide plate has one second smooth diffusing surface, and this second smooth diffusing surface is to be positioned on this light entrance face, and this phosphor body is to be disposed on this second smooth diffusing surface.
13. backlight module according to claim 11 is characterized in that, this light guide plate has a groove, and this groove is to be positioned on this light entrance face, and this phosphor body is to be disposed in this groove.
14. backlight module according to claim 13 is characterized in that, this groove has one the 3rd smooth diffusing surface.
15. backlight module according to claim 11 is characterized in that, also comprises a cavity body structure, is disposed on this light entrance face of this light guide plate, to hold this phosphor body.
16. backlight module according to claim 11 is characterized in that, also comprises colloid, is disposed on this light entrance face of this light guide plate, with this phosphor body set and be coated on this light entrance face of this light guide plate.
17. backlight module according to claim 11, it is characterized in that, this light guide plate also has one first phosphor body coated face, and this first phosphor body coated face is the offside that is positioned at this light entrance face, and this phosphor body is to be disposed on this first phosphor body coated face of this light guide plate.
18. backlight module according to claim 10 is characterized in that, this phosphor body is to be disposed on this light-emitting face of this light guide plate.
19. backlight module according to claim 1 is characterized in that, this phosphor body is to be disposed in this light guide plate.
20. backlight module according to claim 1 is characterized in that, this phosphor body is to be uniformly distributed in this light guide plate, or is distributed in the regional area in this light guide plate.
21. backlight module according to claim 1, it is characterized in that, this light guide plate also has one second phosphor body coated face, and this second phosphor body coated face is adjacent with this light entrance face, and this phosphor body is to be disposed on this second phosphor body coated face of this light guide plate.
22. backlight module according to claim 1 is characterized in that, also comprises a prism, be disposed between this light guide plate and this light emitting diode, and this phosphor body is to be disposed in this prism.
23. backlight module according to claim 1, it is characterized in that, also comprise a reflector plate, wherein this light emitting diode is to be positioned at this light guide plate below, and this reflector plate is to be disposed at by this light guide plate and this light emitting diode, and this phosphor body be disposed on this reflector plate or this reflector plate and this light emitting diode between.
24. backlight module according to claim 23 is characterized in that, this reflector plate has a reflecting curved surface or most the planes of reflection that are connected with each other.
25. backlight module according to claim 1 is characterized in that, also comprises a light-passing board, be disposed between this light emitting diode and this light guide plate, and this phosphor body is to be disposed in this light-passing board.
26. backlight module according to claim 10 is characterized in that, also comprises at least one blooming piece, is disposed at this light-emitting face top of this light guide plate, and this phosphor body be disposed in this blooming piece or a surface of this blooming piece on.
27. backlight module according to claim 26 is characterized in that, this blooming piece comprises diffusion sheet and/or brightening piece.
28. backlight module according to claim 10 is characterized in that, also comprises a reflector plate, be disposed at this light diffusingsurface below of this light guide plate, and this phosphor body is to be disposed on this reflector plate.
29. backlight module according to claim 10, it is characterized in that, also comprise a reflection-type light guide plate, wherein this light emitting diode is to be positioned at this light guide plate below, and this reflection-type light guide plate is to be disposed at by this light emitting diode and this light guide plate, and this phosphor body is to be disposed in this reflection-type light guide plate.
30. backlight module according to claim 1 is characterized in that, also comprises:
One light-passing board is disposed between this light emitting diode and this light guide plate, and this phosphor body is to be disposed in this light-passing board;
One reflection-type light guide plate, wherein this light emitting diode is to be positioned at this light guide plate below, and this reflection-type light guide plate is to be disposed at by this light-passing board and this light guide plate by being disposed at this light emitting diode and this light guide plate.
31. a backlight module is characterized in that, comprising:
One light emitting diode is suitable for sending one first light;
One light guide plate is disposed at by this light emitting diode;
One phosphor body is disposed in the light guide plate, and wherein this phosphor body is to be subjected to the exciting to send one second light of this first light.
32. backlight module according to claim 31 is characterized in that, this light emitting diode comprises a blue light diode, and this first light is blue light.
33. backlight module according to claim 32 is characterized in that, this phosphor body comprises a gold-tinted fluorescent material, and this second light is gold-tinted.
34. backlight module according to claim 32 is characterized in that, this phosphor body comprises a green glow fluorescent material and a ruddiness fluorescent material, and this second light comprises green glow and ruddiness.
35. backlight module according to claim 32 is characterized in that, this blue light-emitting diode comprises a blue light laser diode.
36. backlight module according to claim 31 is characterized in that, this light emitting diode comprises a non-visible light light emitting diode, and this first light is non-visible light.
37. backlight module according to claim 36 is characterized in that, this phosphor body comprises a ruddiness fluorescent material, a blue light fluorescent material and a green glow fluorescent material, and this second light comprises ruddiness, blue light and green glow.
38. backlight module according to claim 36 is characterized in that, this ruddiness fluorescent material in this phosphor body, this blue light fluorescent material and this green glow fluorescent material are to be that array is arranged, mutual storehouse or be mixed with each other each other.
39. backlight module according to claim 36 is characterized in that, this light emitting diode comprises a ultraviolet light-emitting diodes.
40. backlight module according to claim 31 is characterized in that, this light guide plate has a light entrance face, a smooth diffusingsurface and a light-emitting face.
41., it is characterized in that this phosphor body is to be adjacent to this light entrance face and to be disposed in this light guide plate according to the described backlight module of claim 40.
42. according to the described backlight module of claim 41, it is characterized in that, this light guide plate has one second smooth diffusing surface, and this second smooth diffusing surface is to be positioned on this light entrance face, and this phosphor body is to be adjacent to this second smooth diffusing surface and to be disposed in this light guide plate.
43. backlight module according to claim 31 is characterized in that, this phosphor body is to be uniformly distributed in this light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100808556A CN1758114A (en) | 2004-10-09 | 2004-10-09 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100808556A CN1758114A (en) | 2004-10-09 | 2004-10-09 | Backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1758114A true CN1758114A (en) | 2006-04-12 |
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ID=36703565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100808556A Pending CN1758114A (en) | 2004-10-09 | 2004-10-09 | Backlight module |
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| Country | Link |
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| CN (1) | CN1758114A (en) |
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