CN1601351A - Backlight modular and its linear light source and mfg method of linear light source - Google Patents
Backlight modular and its linear light source and mfg method of linear light source Download PDFInfo
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- CN1601351A CN1601351A CNA031470041A CN03147004A CN1601351A CN 1601351 A CN1601351 A CN 1601351A CN A031470041 A CNA031470041 A CN A031470041A CN 03147004 A CN03147004 A CN 03147004A CN 1601351 A CN1601351 A CN 1601351A
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Abstract
The invented backlight module includes light-conducting plate and at least a linear light source, Said linear light source includes point light source and light-conducting light pipe for transferring light ray sent from said point light source. Said light-conducting light pipe includes base plate and reflecting layer placed on said base plate. The light ray sent by point light source can be passed through the light-conducting light pipe and reflected by light-reflecting layer, then can be formed into linear light beam, then said linear light beam can be converted into the plane light by means of light-conducting plate. Said invented backlight module has the advantages of high light source coupling efficiency and high light-outcoming uniformity, said invention also provides the method for making linear light source.
Description
[technical field]
The present invention relates to a kind of backlight module and linear light sorurce thereof and linear light sorurce manufacture method.
[background technology]
Because advantages such as LCD has gently, approaches, power consumption is little are widely used in modernized information equipments such as notebook, mobile phone, personal digital assistant.Because liquid crystal itself does not have the characteristics of luminescence, need provide backlight module to realize Presentation Function for it.Backlight module need have higher outgoing light homogeneity, thereby promotes the visible angle of color contrast, full frame regional luminance effect and the complete machine of the LCD that adopts this backlight module.
The prior art backlight module comprises light source and light guide plate, the light entrance face setting of the relative light guide plate of light source, and the transmission direction that this light-guide plate guides is sent light beam from light source converts line source or pointolite to the area source outgoing.
General at present employing cathode fluorescent tube is as light source, though the bright dipping briliancy of cathode fluorescent tube has good display effect, but there is following defective in it: the relative center section of two ends glorious degrees of cathode fluorescent tube is low, causes the backlight module outgoing light homogeneity not high; Cathode fluorescent tube must high pressure (operating voltage is generally more than 250 volts) and by the AC power supply, be a unfavourable defect to portable display, and AC signal can influence and disturb the image signal of LCD; Cathode fluorescent tube is that right cylinder is luminous, and the efficiency of light energy utilization is low; The life-span of cathode fluorescent tube can be subjected to temperature effect and significantly reduce; Cathode fluorescent tube can't timesharing produce the light of different wave length, thereby can't realize the colorize backlight module; In addition, use the LCD relative cost of cathode fluorescent tube higher.
In order to overcome the defective of cathode fluorescent tube, prior art adopts light emitting diode or other pointolite and lamp guide to be combined into linear light sorurce, specifically can be referring to No. the 99103941st, the Chinese patent of TaiWan, China patent bulletin on September 13rd, No. 507099 1 of TaiWan, China patent bulletin on October 21st, No. 534326 1 of bulletin on May 21st, 2003.But these prior aries have lamp guide and the pointolite coupling efficiency is not high, the complicated and not high shortcoming of luminous uniformity coefficient of lamp guide design.
A kind of prior art backlight module can be consulted Fig. 1, and it is disclosed in No. the 01227387th, the Chinese patent of on July 10th, 2002 bulletin.This backlight module 10 is made up of light conductive plate 20, lamp guide 30 and two light emitting diodes 40.This light conductive plate 20 comprises the two parallel even plates 22,24 of upper and lower leaded light, forms light converging pattern and first respectively on the even plate 22,24 of leaded light and blocks light pattern.This lamp guide 30 is arranged on a side of light conductive plate 20, which is provided with the second and the 3rd and blocks light pattern, and this two light emitting diode 40 is sticked respectively at the two ends of lamp guide 30.This two light emitting diode 40 and lamp guide 30 combinations can form linear light sorurce, but, the prior art backlight module 10 has the following disadvantages: owing to be that the light pattern that blocks that utilizes the second and the 3rd of lamp guide 30 to block light pattern, light conductive plate 20 cooperatively interacts, to promote the outgoing light homogeneity of backlight module 10, its design and complex structure, and the making accuracy requirement height that this blocks light pattern is easy to generate defective products; The light beam that light emitting diode 40 is sent and the coupling efficiency of lamp guide 30 are low, cause the efficiency of light energy utilization low; Light pattern is blocked in employing, and to promote the effect of uniformity coefficient also not ideal enough; In addition, it can't introduce light conductive plate 20 with multiple different color, realizes the function of colour changeable backlight module.
[summary of the invention]
In order to overcome the low defective of the prior art backlight module efficiency of light energy utilization and outgoing light homogeneity, the invention provides a kind of efficiency of light energy utilization height, the higher backlight module of outgoing light homogeneity.
The present invention also provides a kind of efficiency of light energy utilization height, the higher linear light sorurce of outgoing light homogeneity.
The present invention also provides a kind of manufacture method of linear light sorurce.
The technical scheme of technical solution problem of the present invention is: a kind of backlight module is provided, comprise light guide plate and at least one linear light sorurce, this linear light sorurce comprises the leaded light light pipe of at least one pointolite and transmission pointolite institute isolychn, this leaded light light pipe comprises substrate and is arranged at the reflection horizon of substrate, via forming the linear beam emission after the reflection in reflection horizon, this linear beam converts planar light to via light guide plate to the light that pointolite sends in the leaded light light pipe.
The present invention also provides a kind of linear light sorurce, the leaded light light pipe that comprises at least one pointolite and transmission pointolite institute isolychn, this leaded light light pipe comprises substrate and is arranged at the reflection horizon of substrate, via forming the linear beam emission after the reflection in reflection horizon, this linear beam converts planar light to via light guide plate to the light that pointolite sends in the leaded light light pipe.
The present invention also provides a kind of manufacture method of linear light sorurce, comprises step: substrate is provided, in substrate plating reflection horizon, cutting substrate, form leaded light light pipe and mounting points light source in cut surface plating reflection horizon and obtain linear light sorurce.
Compare prior art, the invention has the beneficial effects as follows:, can overcome the defective of cold cathode fluorescent lamp because backlight module of the present invention adopts the linear light sorurce that comprises pointolite and leaded light light pipe; Because the tube wall of leaded light light pipe is coated with the reflection horizon, light after the reflection via the reflection horizon, forms the effect of similar integration sphere in the leaded light light pipe, so light intensity finally forms the even outgoing of linear beam to light guide plate in the even tube wall distribution of leaded light light pipe; And the reflection horizon can prevent effectively that light beam from overflowing from tube wall, thereby promotes the efficiency of light energy utilization; In addition, by changing color, briliancy and the number of pointolite, all right arbitrarily display color of conversion backlight module.
[description of drawings]
Fig. 1 is a kind of stereographic map of prior art backlight module.
Fig. 2 is the stereographic map of linear light sorurce first embodiment of the present invention.
Fig. 3 is the cross section view of linear light sorurce shown in Figure 2.
Fig. 4 to Fig. 6 is other embodiment of substrate shown in Figure 2.
Fig. 7 is the stereographic map of linear light sorurce second embodiment of the present invention.
Fig. 8 is the stereographic map of linear light sorurce the 3rd embodiment of the present invention.
Fig. 9 is the process flow diagram of linear light sorurce manufacture method of the present invention.
Figure 10 to Figure 12 is the concrete steps synoptic diagram of linear light sorurce manufacture method of the present invention.
Figure 13 is the stereographic map of backlight module of the present invention.
[embodiment]
Seeing also Fig. 2 and Fig. 3, is linear light sorurce first embodiment of the present invention.This linear light sorurce 100 comprises the leaded light light pipe 120 of pointolite 110 and 110 isolychns of transmission pointolite.
This pointolite 110 can be micromolecule light emitting diode or polymer LED, also can adopt laser diode to increase briliancy.
The light that these leaded light light pipe 120 transmission pointolites 110 are sent also converts thereof into linear beam, comprises substrate 121 and reflection horizon 122.
These substrate 121 general high light transmittance materials that adopt are made, its material is optional with optical grade acrylic polymers, high molecular polymer, macromolecule carbonization thing, leaded light plastics such as PMMA (Polymethyl Methacrylate, polymethylmethacrylate) or PC (Polycarbonate, polycarbonate), glass or quartzy one of them, be to adopt ejection formation or cut manufactured, the roughly rectangular shape of shape.
The surface of these substrate 121 corresponding point light sources 110 forms optically-coupled portion 124, and this optically-coupled portion 124 is concave spherical surfaces, and the light that pointolite 110 is sent efficiently is coupled into leaded light light pipe 120.Certainly, also can adopt other light source coupled structure such as ellipsoid, the face of cylinder or circular conical surface to wait to substitute this concave spherical surface.
During work, the light that pointolite 110 sends enters leaded light light pipe 120 through optically-coupled portion 124, after the reflection via reflection horizon 122 in leaded light light pipe 120, form the effect of similar integration sphere, light intensity evenly distributes around the substrate 121 of leaded light light pipe 120, by 123 outputs of light delivery outlet, realize the function of linear light sorurce at last.
See also Fig. 4 to Fig. 6, the shape of this leaded light light pipe 120 is not limited to rectangle shown in Figure 3, also can adopt rounded, triangle, polygonal substrate 1211,1212 or 1213.
Seeing also Fig. 7, is linear light sorurce second embodiment of the present invention.This linear light sorurce 200 is roughly the same with the structure of linear light sorurce 100 shown in Figure 2, comprises pointolite 210 and leaded light light pipe 220.
This leaded light light pipe 220 comprises substrate 221 and plating in the reflection horizon 222 on substrate 221 surfaces, and this substrate 221 is offered the optically-coupled portion 224 of Coupling point light source 210, and this reflection horizon 222 cooperates substrate 221 to form a plurality of smooth delivery outlets 223.Light output hole 223 is roughly rounded, its size increases with the distance with pointolite 110, density also increases with the distance with pointolite 110, because the briliancy of the light that pointolite 110 sends increases with distance and reduces, so this design can further promote the uniformity coefficient of the linear light beam of linear light sorurce 200 ejaculations.
Seeing also Fig. 8, is linear light sorurce the 3rd embodiment of the present invention.This linear light sorurce 300 comprises leaded light light pipe 320 and is divided into green pointolite 311, the red pointolite 312 of leaded light light pipe 320 both sides.
This green pointolite 311 and red pointolite 312 be surface adhesion type light-emitting diode or bulb type light emitting diode normally.The peak value scope of the wavelength of this green pointolite 311 is between between the 470nm to 540nm, and the peak value scope of the wavelength of this redness pointolite 312 is between between the 600nm to 660nm.Certainly, this pointolite 311 and 312 also can be the pointolite that blueness or white wait other different color.
This leaded light light pipe 320 comprises substrate 321 and plating in the reflection horizon 322 on substrate 321 surfaces, and this substrate 321 is offered the optically-coupled portion 324 of Coupling point light source 311, and this reflection horizon 322 cooperates substrate 321 to form a plurality of smooth delivery outlets 323.Light output hole 223 is roughly triangular in shape, is uniformly distributed in a surface of substrate 321.Certainly, light output hole 323 also can be other shapes such as ellipse, square or polygon.
Because green pointolite 311 and red pointolite 312 are coupled into leaded light light pipe 320 simultaneously, the color briliancy of selecting to light the pointolite of different color or regulate the difference light source by point of adjustment light source 311 and 312 driving powers (figure does not show) can produce the linear light sorurce of colour changeable.
See also Fig. 9, the manufacture method of linear light sorurce of the present invention comprises: the step 402 in the step 401 of substrate ejection formation, evaporation reflection horizon, the step 403 of cutting substrate, the step 405 of installing at the step 404 and the pointolite in cut surface plating reflection horizon.Be specifically described below in conjunction with Fig. 2, Figure 10 to Figure 12.
The step 401 of substrate ejection formation can be consulted Figure 10, at first adopts ejection forming technique to make substrate 121, and a side of this substrate 121 has sphere optically-coupled portion 124.Certainly, this substrate 121 also can adopt and the method manufacturing such as cut, and offers optically-coupled portion 124 again.
The step 402 in evaporation reflection horizon, the step 403 of cutting substrate can be consulted Figure 11, adopt the shadow mask (figure does not show) of Wireframe (wire frame) the shieldable formation light delivery outlet 123 that supports, in the surface of substrate 121 and the reflection horizon 122 of back side plating one deck high reflectance, this reflection horizon 122 can be the reflection horizon of metal material or the dielectric medium high reflection layer that utilizes the multicoating design.After finishing plated film, adopt line to cut or cutting mode, substrate 121 is cut into a plurality of bars.
Step 404 in cut surface plating reflection horizon can be consulted Figure 12, plates high reflection layer at the cut surface 125 of substrate 121, simultaneously, and can also be at light delivery outlet 123 plating anti-reflecting layers.
The step 405 that pointolite is installed can be consulted Fig. 2, and the optically-coupled portion 124 mounting points light sources 110 of the substrate 121 of this leaded light light pipe 120 are finished linear light sorurce 100 of the present invention relatively.This pointolite 110 can be the light emitting diode or the laser diode of different colors such as white, blueness, green or redness.
Seeing also Figure 13, is backlight module first embodiment of the present invention.This backlight module 90 comprises linear light sorurce 100 and light guide plate 500, is converted to the planar light outgoing from the linear light beam of linear light sorurce 100 through light guide plate 500.
This linear light sorurce 400 comprises the leaded light light pipe 120 of pointolite 110 and 110 luminous bundles of transmission pointolite.
This light guide plate 500 is plate shaped light guide plate, adopts transparent materials such as acryl, glass or polycarbonate to make, the exiting surface 502 that it comprises an incidence surface 501, link to each other with incidence surface 501 with exiting surface 502 opposed bottom surface 503.
This incidence surface 501 receives the light beam that linear light sorurce 100 sends, and the zone of the light beam that coupling linear light sorurce 100 sends on it can be provided with anti-reflective film (figure does not show), to improve the light beam utilization factor, further strengthens coupling efficiency.This exiting surface 502 can be processed as the uneven surface with certain roughness, to promote the homogeneity from exiting surface 502 outgoing beams.This bottom surface 503 is provided with a plurality of sites (figure do not show), and the big I of this site increases progressively along the direction away from incidence surface 501, also can be uniformly distributed in bottom surface 503, and it can be cylindric, spherical shape, square, pyramid or other suitable shape.This site can be distributed in bottom surface 503 by modes such as printing or ejection formations.In addition, also can be 503 a plurality of V-shaped grooves (figure does not show) be set in the bottom surface.
Certainly, the present invention also can have other improvement or replacement.As, be bright dipping briliancy and the uniformity coefficient that strengthens backlight module 90, can further diffuser plate and prismatic lens (figure does not show) be set in exiting surface 502 1 sides of being close to light guide plate 500, in bottom surface 503 1 sides of contiguous light guide plate 500 reflecting plate is set.
For obtaining the backlight module of colour changeable, also can adopt known any large scale side-light type light guide plate, the linear light sorurce of different colours is arranged at one of light guide plate light incident side face respectively.The driving power of the pointolite that adopts by the linear light sorurce of regulating different colours is to produce the linear beam of colour changeable.
Claims (19)
1. backlight module, comprise at least one linear light sorurce and light guide plate, light beam from linear light sorurce converts the planar light outgoing to through light guide plate, this linear light sorurce comprises the leaded light light pipe of at least one pointolite and transmission pointolite institute isolychn, it is characterized in that: this leaded light light pipe comprises substrate and is arranged at the reflection horizon of substrate that the light that pointolite sends is launched via forming linear beam after the reflection in reflection horizon in the leaded light light pipe.
2. backlight module as claimed in claim 1 is characterized in that: this substrate adopts the light transmission optical material to make.
3. backlight module as claimed in claim 1 is characterized in that: this substrate is rectangular, circular, triangle or polygon.
4. backlight module as claimed in claim 1 is characterized in that: this reflection horizon is the dielectric medium reflection horizon of metallic reflective coating or multicoating design.
5. backlight module as claimed in claim 1 is characterized in that: this leaded light light pipe also comprises the optically-coupled portion of Coupling point light source.
6. backlight module as claimed in claim 5 is characterized in that: this optically-coupled portion is concave spherical surface, ellipsoid, the face of cylinder or circular conical surface.
7. backlight module as claimed in claim 1 is characterized in that: this reflection horizon cooperates substrate to form the light delivery outlet.
8. backlight module as claimed in claim 7 is characterized in that: the light output hole is rectangle, circular, square, oval, triangle or polygon.
9. backlight module as claimed in claim 7 is characterized in that: the size in light output hole and density increase with the distance with pointolite.
10. backlight module as claimed in claim 7 is characterized in that: the light output hole evenly distributes.
11. backlight module as claimed in claim 7 is characterized in that: light output hole plating has anti-reflective film.
12. backlight module as claimed in claim 1 is characterized in that: this pointolite is one of red light source, blue-light source or green light source.
13. backlight module as claimed in claim 12 is characterized in that: this pointolite is light emitting diode or laser diode.
14. linear light sorurce, the leaded light light pipe that comprises at least one pointolite and transmission pointolite institute isolychn, it is characterized in that: this leaded light light pipe comprises substrate and is arranged at the reflection horizon of substrate that the light that pointolite sends is launched via forming linear beam after the reflection in reflection horizon in the leaded light light pipe.
15. a linear light sorurce manufacture method comprises step: provide substrate; In substrate plating reflection horizon; Cutting substrate; Form the leaded light light pipe in cut surface plating reflection horizon; The mounting points light source obtains linear light sorurce.
16. linear light sorurce manufacture method as claimed in claim 15 is characterized in that: this substrate is to adopt ejection formation or cut manufactured.
17. linear light sorurce manufacture method as claimed in claim 15 is characterized in that: this reflection horizon is to adopt chemical vapour deposition technique, electron beam evaporation plating method or sputtering method to form.
18. linear light sorurce manufacture method as claimed in claim 15 is characterized in that: this substrate adopts line to cut or cut and cuts.
19. linear light sorurce manufacture method as claimed in claim 15 is characterized in that: this manufacture method also is included in the step of light delivery outlet coating anti reflection layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031470041A CN1601351A (en) | 2003-09-25 | 2003-09-25 | Backlight modular and its linear light source and mfg method of linear light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031470041A CN1601351A (en) | 2003-09-25 | 2003-09-25 | Backlight modular and its linear light source and mfg method of linear light source |
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| CN1601351A true CN1601351A (en) | 2005-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031470041A Pending CN1601351A (en) | 2003-09-25 | 2003-09-25 | Backlight modular and its linear light source and mfg method of linear light source |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598299B (en) * | 2008-06-05 | 2012-01-25 | 鸿富锦精密工业（深圳）有限公司 | Light source module and game device using same |
| CN102483199A (en) * | 2009-09-11 | 2012-05-30 | Opto设计股份有限公司 | Surface illumination method using point light source, linear light source device, and surface illumination device using linear light source device |
| CN104728684A (en) * | 2015-04-22 | 2015-06-24 | 南京中科神光科技有限公司 | Laser-line light source and liquid crystal display backlight |
| CN109765727A (en) * | 2019-03-28 | 2019-05-17 | 深圳创维－Rgb电子有限公司 | Side-edge type backlight, mould group and laser television |
| CN114777678A (en) * | 2017-10-06 | 2022-07-22 | 先进扫描仪公司 | Generating one or more luminance edges to form a three-dimensional model of an object |
-
2003
- 2003-09-25 CN CNA031470041A patent/CN1601351A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598299B (en) * | 2008-06-05 | 2012-01-25 | 鸿富锦精密工业（深圳）有限公司 | Light source module and game device using same |
| CN102483199A (en) * | 2009-09-11 | 2012-05-30 | Opto设计股份有限公司 | Surface illumination method using point light source, linear light source device, and surface illumination device using linear light source device |
| CN102483199B (en) * | 2009-09-11 | 2015-01-21 | Opto设计股份有限公司 | Surface illumination method using point light source, linear light source device, and surface illumination device using linear light source device |
| CN104728684A (en) * | 2015-04-22 | 2015-06-24 | 南京中科神光科技有限公司 | Laser-line light source and liquid crystal display backlight |
| CN114777678A (en) * | 2017-10-06 | 2022-07-22 | 先进扫描仪公司 | Generating one or more luminance edges to form a three-dimensional model of an object |
| CN114777681A (en) * | 2017-10-06 | 2022-07-22 | 先进扫描仪公司 | Generating one or more luminance edges to form a three-dimensional model of an object |
| CN114777684A (en) * | 2017-10-06 | 2022-07-22 | 先进扫描仪公司 | Generating one or more luminance edges to form a three-dimensional model of an object |
| CN114777679A (en) * | 2017-10-06 | 2022-07-22 | 先进扫描仪公司 | Generating one or more luminance edges to form a three-dimensional model of an object |
| EP4268757A3 (en) * | 2017-10-06 | 2023-12-06 | Advanced Scanners, Inc. | Generation of one or more edges of luminosity to form three-dimensional models of objects |
| CN109765727A (en) * | 2019-03-28 | 2019-05-17 | 深圳创维－Rgb电子有限公司 | Side-edge type backlight, mould group and laser television |
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