CN101963315A - Light source module and liquid crystal display - Google Patents
Light source module and liquid crystal display Download PDFInfo
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- CN101963315A CN101963315A CN2010105138895A CN201010513889A CN101963315A CN 101963315 A CN101963315 A CN 101963315A CN 2010105138895 A CN2010105138895 A CN 2010105138895A CN 201010513889 A CN201010513889 A CN 201010513889A CN 101963315 A CN101963315 A CN 101963315A
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Abstract
The invention discloses a light source module and a liquid crystal display applying the same. The light source module comprises a light guide plate, a frame body, a circuit board and a plurality of point light sources, wherein the light guide plate comprises a light-emitting surface and a light-entering surface; the light guide plate is arranged in the frame body; the part of the frame body facing to the light-entering surface of the light guide plate is provided with a plurality of lamp cup structures, the X direction diverging angle of each lamp cup structure is between 90-150 DEG; the circuit board is arranged outside the frame body, and the bottom of each lamp cup structure is provided with a light source setting region exposing the circuit board; and the point light sources are arranged on the light source setting regions and positioned in the lamp cup structures. The light source module can have better light-emitting efficiency, and the liquid crystal display adopting the light source module as a backlight source has better display effect.
Description
Technical field
The invention relates to a kind of light source module and LCD, and particularly relevant for a kind of side incident type light source module and the LCD of using this light source module.
Background technology
The main member of LCD comprises display panels and backlight module, wherein liquid crystal panel is made of two plate bases and the liquid crystal layer that is disposed between this two substrate, backlight module then is in order to provide this liquid crystal panel required light source, so that LCD reaches the effect of demonstration.In recent years, the backlight liquid crystal display module adopts the light emitting diode with long, characteristic such as efficient is high and environmental pollution is lower of life-span (Light Emitting Diode is LED) as backlight.
Be subjected to the destruction of external environment for fear of light-emitting diode chip for backlight unit, known side incident type backlight module mostly is to adopt by encapsulation technology light-emitting diode chip for backlight unit to be made into LED encapsulation body as light emitting source, and disposes LGP before the exiting surface of these LED encapsulation bodies.When these LED encapsulation bodies emitted beam, light can enter LGP and offer the required light source of display panels.Owing to be subject to the influence of encapsulating housing and packing colloid, the rising angle of LED encapsulation body is limited, therefore when light enters LGP, may produce bright phenomenon of secretly interlocking near a side of exiting surface at LGP, and then influence the light extraction efficiency of backlight module.Therefore moreover the thickness of LGP also is subject to the lighting area of LED encapsulation body, and its restriction is more and selectivity is also less when selecting LGP.In addition, since light-emitting diode chip for backlight unit be earlier via piece on loading plate, then carry out packaging technology, afterwards again piece on circuit board, that is to say, must LED encapsulation body could be fixed on the circuit board via twice piece process, therefore not only can increase the number of assembling steps of backlight module, also can increase manufacturing cost.
Summary of the invention
The invention provides a kind of light source module, have preferable light extraction efficiency.
The invention provides a kind of LCD, have good display quality.
The present invention proposes a kind of light source module, and it comprises a LGP, a framework, a circuit board and a plurality of spot light.LGP comprises an exiting surface and an incidence surface.LGP is arranged in the framework, and wherein framework has a plurality of Lamp cup structures at the incidence surface place towards LGP, and the directions X dispersion angle of each Lamp cup structure is between 90～150 degree.Circuit board is positioned at the outside of framework, and the bottom-exposed of Lamp cup structure goes out a light source setting area of circuit board.Spot light is arranged on the light source setting area, and spot light is positioned at the Lamp cup structure.
Above-mentioned light source module, wherein, this incidence surface of this LGP is the edge that is placed in those Lamp cup structures.
Above-mentioned light source module, wherein, the distance between this incidence surface of this LGP and the bottom of those Lamp cup structures is between 0.4～2.5mm.
Above-mentioned light source module wherein, is provided with the red, green, blue spot light in each Lamp cup structure, and this red, green, blue spot light is injected this LGP blend together white light in this Lamp cup structure after.
Above-mentioned light source module wherein, in those Lamp cup structures, is the air gap between this incidence surface of this LGP and those spot lights.
Above-mentioned light source module wherein, comprises that more a color conversion sheet is arranged on this incidence surface of this LGP, and the coloured light of those spot lights can be transformed into white light after this color conversion sheet.
Above-mentioned light source module, wherein, this color conversion sheet comprises: a base material; At least one fluorescence coating is coated at least one surface of this base material; And at least one diffusion particle, be disposed in this at least one fluorescence coating.
Above-mentioned light source module wherein, more comprises colloid, fills in those Lamp cup structures.
Above-mentioned light source module, wherein, this colloid is a transparent colloid.
Above-mentioned light source module wherein, is scattered with a fluorescent material in this colloid, the coloured light of those spot lights can be transformed into white light after this fluorescent material.
Above-mentioned light source module, wherein, this framework has a plurality of frames, and has a corner frame between the two adjacent frames, and those Lamp cup structures are arranged at least one those corner frames.
Above-mentioned light source module, wherein, this framework is a plastic frame body, and the surface of those Lamp cup structures has light diffusing matter or light reflectance properties.
Above-mentioned light source module, wherein, those spot lights are light-emitting diode chip for backlight unit.
The present invention also proposes a kind of LCD, and it comprises a display panels and a light source module.Light source module is positioned at the back side of display panels, and wherein light source module is as comprising light source module as described above.
Based on above-mentioned, because framework of the present invention has the Lamp cup structure, wherein the directions X dispersion angle of Lamp cup structure is between 90～150 degree, and the dispersion angle of Z direction can design according to the thickness of LGP, changes the rising angle of spot light by this.Thus, light source module of the present invention can have preferable light extraction efficiency, adopts this light source module then to have preferable display effect as the LCD of backlight.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Figure 1A is the schematic perspective view of a kind of light source module of one embodiment of the invention;
Figure 1B is the generalized section of the light source module of Figure 1A;
Fig. 1 C is the schematic perspective view of the framework of Figure 1A;
Fig. 1 D is arranged in the schematic diagram of a Lamp cup structure for a plurality of spot lights of Figure 1A;
Fig. 1 E is the framework of light source module of Figure 1A and the last schematic diagram of spot light;
Fig. 2 A is the generalized section of a kind of light source module of one embodiment of the invention;
Fig. 2 B is the generalized section of the color conversion sheet of Fig. 2 A;
Fig. 3 is the schematic diagram of a kind of light source module of another embodiment of the present invention;
Fig. 4 is the schematic perspective view of a kind of light source module of one embodiment of the invention;
Fig. 5 is the schematic diagram of a kind of LCD of one embodiment of the invention.
Wherein, Reference numeral
10: LCD
20: display floater
100a, 100b, 100c, 100d: light source module
110: LGP
112: exiting surface
114: incidence surface
120,120a: framework
122: the Lamp cup structure
124: frame
126: the corner frame
130: circuit board
132: the light source setting area
140: spot light
142: red spot light
144: green spot light
146: the Bluepoint light source
150: the color conversion sheet
152: base material
154: fluorescence coating
156: diffusion particle
160: colloid
θ: directions X dispersion angle
α: Z directional divergence angle
D: distance
The specific embodiment
Below in conjunction with the drawings and specific embodiments technical solution of the present invention being described in detail, further understanding purpose of the present invention, scheme and effect, but is not the restriction as claims protection domain of the present invention.
Figure 1A is the schematic perspective view of a kind of light source module of one embodiment of the invention.Figure 1B is the generalized section of the light source module of Figure 1A.Fig. 1 C is the schematic perspective view of the framework of Figure 1A.Fig. 1 D is arranged in the schematic diagram of a Lamp cup structure for a plurality of spot lights of Figure 1A.Fig. 1 E is the framework of light source module of Figure 1A and the last schematic diagram of spot light.
Please also refer to Figure 1A, Figure 1B, Fig. 1 C, Fig. 1 D and Fig. 1 E, in the present embodiment, light source module 100a comprises a LGP 110, a framework 120, a circuit board 130 and a plurality of spot light 140, and wherein light source module 100a for example is a side incident type light source module.
Specifically, LGP 110 comprises an exiting surface 112 and an incidence surface 114, and wherein LGP 110 is arranged in the framework 120, and framework 120 has a plurality of Lamp cup structures 122 at incidence surface 112 places towards LGP 110.Particularly, in the present embodiment, the incidence surface 114 of LGP 110 is the edges that are placed in these Lamp cup structures 122, and the directions X dispersion angle θ of each Lamp cup structure 122 for example is between 90～150 degree (shown in Fig. 1 D and Fig. 1 E).Circuit board 130 is positioned at the outside of framework 120, and the bottom-exposed of these Lamp cup structures 122 goes out a light source setting area 132 of circuit board 130, and wherein the distance D between the bottom of the incidence surface 114 of LGP 110 and these Lamp cup structures 122 for example is between 0.4～2.5mm.
These spot lights 140 are arranged on the light source setting area 132, and these spot lights 140 are positioned at these Lamp cup structures 122.More particularly, in these Lamp cup structures 122, be the air gap between the incidence surface 114 of LGP 110 and these spot lights 140.These spot lights 140 can be in certain distance, and (meaning is the distance D between the bottom of the incidence surface 114 of LGP 110 and these Lamp cup structures 122) is mixed into white light, and the design of the Lamp cup structure 122 by different angles produces the light type of different angles.In addition, these spot lights 140 for example are the light-emitting diode chip for backlight unit of a plurality of un-encapsulated, and wherein these light-emitting diode chip for backlight unit for example are the combinations of a plurality of white light emitting diode chips, a plurality of red light-emitting diode chip, a plurality of blue LED chip, a plurality of green light LED chips or aforesaid light-emitting diode chip for backlight unit.
For instance, when the light source module 100a of present embodiment desires white light is provided, can in a Lamp cup structure 122, only dispose a spot light 140, wherein this spot light 140 for example is a white light emitting diode chip, can directly inject LGP 110 and form the white light area source, please refer to Figure 1A.Or, three red, green, blue spot lights 142,144,146 of configuration in a Lamp cup structure 122, wherein these red, green, blue spot lights 142,144,146 are respectively red light-emitting diode chip, green light LED chip and blue LED chip, inject LGP 110 after in Lamp cup structure 122, blending together the three-wavelength white light by these red, green, blue spot lights 142,144,146, and form the white light area source, please refer to Fig. 1 D.The mode of above-mentioned formation white light is not in order to limit the present invention only for illustrating.
In addition, these Lamp cup structures 122 of present embodiment have Z directional divergence angle [alpha], and Z directional divergence angle [alpha] is not to be certain value, and meaning is an adjustable varied angle to produce the design of the type of not sharing the same light.More specifically, and the Z directional divergence angle [alpha] of these Lamp cup structures 122 can design according to the thickness of LGP 110, change the rising angle of these spot lights 140 by this, so the rising angle of these spot lights 140 can not be subject to the influence of encapsulating housing or packing colloid.Thus, the light source module 100a of present embodiment can have preferable light extraction efficiency.In addition, because these spot lights 140 that present embodiment adopted are the light-emitting diode chip for backlight unit of un-encapsulated, therefore for known technology, these spot lights 140 only need can be finished the setting of light source through a piece on circuit board 130, can reduce number of assembling steps and the manufacturing cost of light source module 100a.
Below will utilize the design of a plurality of different source module 100b～100d of embodiment Mingguang City.In this mandatory declaration is that following embodiment continues to use the assembly label and the partial content of previous embodiment, wherein adopts identical label to represent identical or approximate assembly, and has omitted the explanation of constructed content.Explanation about clipped can be with reference to previous embodiment, and following embodiment no longer repeats to give unnecessary details.
Fig. 2 A is the generalized section of a kind of light source module of one embodiment of the invention.Fig. 2 B is the generalized section of the color conversion sheet of Fig. 2 A.Please refer to Fig. 2 A, the light source module 100b of present embodiment is similar to the light source module 100a of Figure 1B, both difference is: the light source module 100b of Fig. 2 A more comprises a color conversion sheet 150, wherein color conversion sheet 150 is arranged on the incidence surface 114 of LGP 110, and the coloured light of these spot lights 140 can be transformed into white light after color conversion sheet 150.
Specifically, please also refer to Fig. 2 A and Fig. 2 B, in the present embodiment, color conversion sheet 150 comprises a base material 152, at least one fluorescence coating 154 (schematically illustrating two layers of fluorescence coating 154 among Fig. 2 B) and at least one diffusion particle 156 (schematically illustrating a plurality of diffusion particles 156 among Fig. 2 B).Wherein, these fluorescence coatings 154 are coated on relative two surfaces of base material 152, and these diffusion particles 156 are configured in these fluorescence coatings 154, and these diffusion particles 156 diffusion particle that for example is identical or different size.
For instance, in the present embodiment, these spot lights 140 for example are a plurality of blue LED chips, and these fluorescence coatings 154 for example are by the formed fluorescence coating of yellow fluorescent material.When the coloured light (blue light) that is sent when these spot lights 140 is passed to the external world by the exiting surface 112 of LGP 110, in this process, the coloured light (blue light) that these spot lights 140 are sent can shine color conversion sheet 150, and can excite yellow fluorescent material in these fluorescence coatings 154 to send coloured light (gold-tinted) from the coloured light (blue light) that these spot lights 140 are sent, and mix mutually with coloured light (blue light) that these spot lights 140 are sent, to produce the being seen two wavelength white lights of human eye.Simultaneously, also make the light that these spot lights 140 are sent even more, to increase the uniformity of the light that these spot lights 140 are sent by these diffusion particles 156 in the color conversion sheet 150.Thus, the light source module 100b of present embodiment can have preferable outgoing light homogeneity.
Certainly, in other embodiment, these fluorescence coatings 154 are also by red fluorescence material and the formed fluorescence coating of green fluorescent material.The coloured light (blue light) that is sent when these spot lights 140 shines color conversion sheet 150, and can excite red fluorescence material in these fluorescence coatings 154 and green fluorescent material to send coloured light from the coloured light (blue light) that these spot lights 140 are sent, and mix mutually with coloured light (blue light) that these spot lights 140 are sent, to produce the being seen three-wavelength white light of human eye.Above-mentioned technology still belongs to the adoptable technical scheme of the present invention, does not break away from the scope of institute of the present invention desire protection.
Because the light source module 100b of present embodiment has the color conversion sheet 150 on the incidence surface 114 that is arranged at LGP 110, so the coloured light that these fluorescence coatings 154 of working as color conversion sheet 150 are sent is preferable with the mutually mixed coloured light uniformity of coloured light that these spot lights 140 are sent, that is to say, when mixed coloured light transmitted the external world, the outgoing light homogeneity that light source module 100b is presented was preferable.In brief, the light source module 100b of present embodiment also has preferable outgoing light homogeneity except having preferable light extraction efficiency.
Fig. 3 is the generalized section of a kind of light source module of one embodiment of the invention.Please refer to Fig. 3, the light source module 100c of present embodiment is similar to the light source module 100a of Figure 1B, both difference is: the light source module 100c of Fig. 3 more comprises colloid 160, and wherein colloid 160 fills in these Lamp cup structures 122, and covers these spot lights 140.
Specifically, in the present embodiment, colloid 160 for example is a transparent colloid, and wherein the setting of this colloid 160 is except being in order to protect these spot lights 140, is subjected to also can be considered lens outside ambient temperature, moisture and the The noise avoiding.When light that these spot lights 140 sent was passed to the external world through colloid 160 mixed lights, light source module 100c can have preferable outgoing light homogeneity.Certainly, in the embodiment that other does not illustrate, also spreadable in the colloid 160 have a fluorescent material (for example being yellow fluorescent powder), and the coloured light (blue light) of these spot lights 140 (for example being blue led chips) can be transformed into white light after fluorescent material.Therefore, the colloid 160 of above-mentioned Fig. 3 is not in order to limit the present invention only for illustrating.
Fig. 4 is the schematic perspective view of a kind of light source module of one embodiment of the invention.Please refer to Fig. 4, the light source module 100d of present embodiment is similar to the light source module 100a of Figure 1B, both difference is: the framework 120a of Fig. 4 has a plurality of frames 124, and have a corner frame 126 between the two adjacent frames 124, and these Lamp cup structures 122 are arranged at least one these corner frames 126.
Specifically, in the present embodiment, framework 120a for example is a plastic frame body, and the surface of these Lamp cup structures 122 has light diffusing matter or light reflectance properties.For example, can adopt and have light diffusing matter or the material of light reflectance properties material as framework 120a, perhaps be provided with and have the light diffusing matter or the material of light reflectance properties in the surface of Lamp cup structure 122, wherein, above-mentioned have light diffusing matter or the material of light reflectance properties for example is Merlon (polycarbonate), but be not limited thereto.Therefore, when light that these spot lights 140 are sent is passed to via these Lamp cup structures 122 in the process of incidence surface 114 of LGP 110, the light of these spot lights 140 can spread light or reflection ray via the light diffusing matter or the light reflectance properties on the surface of these Lamp cup structures 122, can increase the outgoing light homogeneity of these spot lights 140.Thus, the light source module 100d of present embodiment is except can having preferable light extraction efficiency, and it also has preferable outgoing light homogeneity.
In addition, in the embodiment that other does not illustrate, also can be selected to members such as the mentioned color conversion sheet 150 of embodiment as described above, colloid 160, or the design of in a Lamp cup structure 122, disposing red, green, blue spot light 142,144,146 simultaneously, those skilled in the art works as can be with reference to the explanation of previous embodiment, according to actual demand, and select aforementioned components for use, to reach required technique effect.
Fig. 5 is the schematic diagram of a kind of LCD of one embodiment of the invention.Please refer to Fig. 5, in the present embodiment, LCD 10 comprises a display panels 20 and a light source module 100a (or for example being light source module 100b, 100c, 100d).Light source module 100a (or for example being light source module 100b, 100c, 100d) is the back side that is positioned at display panels 20, wherein the design of light source module 100a (or for example being light source module 100b, 100c, 100d) has been illustrated in the foregoing description, please refer to above-mentioned explanation, repeat no more in this.
In the present embodiment, the light that these spot lights 140 of light source module 100a are sent can be via penetrating after LGP 110 correctings, light source module 100a provided for example be the area source of uniform luminance to use to display panels 20.Wherein, display panels 20 can be semi-penetrating and semi-reflecting type display panel, micro-reflection type display floater reflective display panel, colored filter display floater of (color filter onarray) on active layers, active layers display floater of (array on color filter) on colored filter, vertical orientation type (VA) display floater, horizontal switch type (IPS) display floater, multi-domain perpendicular alignment-type (MVA) display floater, twisted nematic (TN) display floater, super-twist nematic (STN) display floater, pattern vertical orientation type (PVA) display floater, super pattern vertical orientation type (S-PVA) display floater, the advanced person is type (ASV) display floater with great visual angle, fringe field switch type (FFS) display floater, continuous fireworks shape arrange type (CPA) display floater, axial symmetry is arranged micella type (ASM) display floater, optical compensation curved arrange type (OCB) display floater, super horizontal switch type (S-IPS) display floater, advanced super horizontal switch type (AS-IPS) display floater, extreme edge electric field switch type (UFFS) display floater, stabilizing polymer alignment-type display floater, double vision angle type (dual-view) display floater, three visual angle type (triple-view) display floaters, 3 d display (three-dimensional), multiaspect display floater (multi-panel), or other profile plate.
Because the light source module 100a (or for example being light source module 100b, 100c, 100d) of present embodiment has preferable light extraction efficiency and outgoing light homogeneity, the light source module 100a (or for example being light source module 100b, 100c, 100d) that therefore adopts present embodiment has preferable display effect as 10 of the LCDs of backlight.
In sum, because framework of the present invention has the Lamp cup structure, wherein the directions X dispersion angle of Lamp cup structure is between 90～150 degree, and the dispersion angle of Z direction can design according to the thickness of LGP, changes the rising angle of spot light by this.Thus, light source module of the present invention can have preferable light extraction efficiency, adopts this light source module then to have preferable display effect as the LCD of backlight.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (14)
1. a light source module is characterized in that, comprising:
One LGP, it comprises an exiting surface and an incidence surface;
One framework, this LGP are arranged in this framework, and wherein this framework has a plurality of Lamp cup structures at this incidence surface place towards this LGP, and the directions X dispersion angle of each Lamp cup structure is between 90～150 degree;
One circuit board be positioned at the outside of this framework, and the bottom-exposed of those Lamp cup structures goes out a light source setting area of this circuit board;
A plurality of spot lights are arranged on this light source setting area, and those spot lights are positioned at those Lamp cup structures.
2. light source module as claimed in claim 1 is characterized in that, this incidence surface of this LGP is the edge that is placed in those Lamp cup structures.
3. light source module as claimed in claim 2 is characterized in that, the distance between this incidence surface of this LGP and the bottom of those Lamp cup structures is between 0.4～2.5mm.
4. light source module as claimed in claim 1 is characterized in that, in each Lamp cup structure the red, green, blue spot light is set, and this red, green, blue spot light is injected this LGP blend together white light in this Lamp cup structure after.
5. light source module as claimed in claim 1 is characterized in that, in those Lamp cup structures, is the air gap between this incidence surface of this LGP and those spot lights.
6. light source module as claimed in claim 1 is characterized in that, comprises that more a color conversion sheet is arranged on this incidence surface of this LGP, and the coloured light of those spot lights can be transformed into white light after this color conversion sheet.
7. light source module as claimed in claim 6 is characterized in that, this color conversion sheet comprises:
One base material;
At least one fluorescence coating is coated at least one surface of this base material; And
At least one diffusion particle is disposed in this at least one fluorescence coating.
8. light source module as claimed in claim 1 is characterized in that, more comprises colloid, fills in those Lamp cup structures.
9. light source module as claimed in claim 8 is characterized in that, this colloid is a transparent colloid.
10. light source module as claimed in claim 8 is characterized in that, is scattered with a fluorescent material in this colloid, and the coloured light of those spot lights can be transformed into white light after this fluorescent material.
11. light source module as claimed in claim 1 is characterized in that, this framework has a plurality of frames, and has a corner frame between the two adjacent frames, and those Lamp cup structures are arranged at least one those corner frames.
12. light source module as claimed in claim 1 is characterized in that, this framework is a plastic frame body, and the surface of those Lamp cup structures has light diffusing matter or light reflectance properties.
13. light source module as claimed in claim 1 is characterized in that, those spot lights are light-emitting diode chip for backlight unit.
14. a LCD is characterized in that, comprising:
One display panels; And
One light source module is positioned at the back side of this display panels, and wherein this light source module is as described in the claim 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010513889.5A CN101963315B (en) | 2010-10-14 | 2010-10-14 | Light source module and liquid crystal display |
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| CN201010513889.5A CN101963315B (en) | 2010-10-14 | 2010-10-14 | Light source module and liquid crystal display |
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| CN102588836A (en) * | 2012-02-13 | 2012-07-18 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
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| CN102313209A (en) * | 2011-09-09 | 2012-01-11 | 深圳市华星光电技术有限公司 | Backlight module group and liquid crystal display |
| CN102588836A (en) * | 2012-02-13 | 2012-07-18 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN103363399A (en) * | 2012-03-28 | 2013-10-23 | 三星电子株式会社 | Backlight unit and image display apparatus having same |
| CN102798043A (en) * | 2012-08-02 | 2012-11-28 | 青岛海信电器股份有限公司 | Direct-lighting type backlight module |
| CN104456300A (en) * | 2014-11-14 | 2015-03-25 | 深圳市华星光电技术有限公司 | Backlight source, manufacturing method of backlight source and liquid crystal display |
| WO2019179426A1 (en) * | 2018-03-20 | 2019-09-26 | 京东方科技集团股份有限公司 | Light source module and display device |
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| CN101963315B (en) | 2016-01-20 |
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