CN100389347C - Plate for guiding light and backlight module - Google Patents
Plate for guiding light and backlight module Download PDFInfo
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- CN100389347C CN100389347C CNB2004100919525A CN200410091952A CN100389347C CN 100389347 C CN100389347 C CN 100389347C CN B2004100919525 A CNB2004100919525 A CN B2004100919525A CN 200410091952 A CN200410091952 A CN 200410091952A CN 100389347 C CN100389347 C CN 100389347C
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- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 5
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- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 239000000057 synthetic resin Substances 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
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- 239000012141 concentrate Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 230000005142 aphototropism Effects 0.000 description 1
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Abstract
The present invention relates to a light guide plate and a backlight module which are applied to the field of liquid crystal display; the light guide plate is provided with a cutting angle and comprises an incident surface, an exit surface and a reflecting surface, wherein the incident surface is used as the lateral face of the cutting angle; the exit surface is used as the upper surface of the light guide plate and is adjacent to the incident surface; the reflecting surface is opposite to the exit surface, and a plurality of V-shaped micro structures which are bulged towards the external of the light guide plate and distributed in a circular arc shape are formed on the reflecting surface; the V-shaped micro structures have the same center of circle and are towards the incident surface; the cross sections of the V-shaped micro structures have the same shape; the longer of the distance between the micro structures and the incident surface, the larger of the arrangement density is, and the larger of the dimension is. The combination of the light guide plate and the light source of the present invention can realize the functions of the traditional backlight module and have the advantages of high brightness and good homogeneity of exit light. The present invention also provides a backlight module using the light guide plate.
Description
[technical field]
The present invention relates to a kind of light guide plate and module backlight that is applied to field of liquid crystal display, relate in particular to a kind of light guide plate and module backlight of side-light type.
[background technology]
(Light Guide Plate LGP) mainly comprises light entrance face, reflecting surface, exit facet and several side to light guide plate, is the important component part in the LCD backlight module system.Its effect be the light that sends of guiding spaced point light source (for example light emitting diode) or line source (for example cold-cathode tube) from a plane outgoing, improve the homogeneity of luminous gray scale of panel and luminosity simultaneously.Light guide plate generally adopts the synthetic resin material to make, and its substrate shape is divided into plate and the wedge type curved face type.
The light that enters light guide plate will be propagated in plate according to full emission principle, when light ran into the microstructure (Pattern) on light guide plate surface, full launching condition was destroyed, and light is from the positive ejaculation of light guide plate, density, the microstructure design that varies in size can make the light guide plate uniformly light-emitting.The light guide board microstructure manufacturing technology can be divided into two big classes: printing-type and non-printing-type.The former utilizes the wire mark mode that printing ink is imprinted on the light guide plate, makes microstructure shape and distribution.The latter in mould, comparatively simplifies microstructure design on making then directly with ejection forming technique, and the precision height, is present light guide plate technology main flow.Non-printing-type method for making is divided into again: chemical etching method, laser direct-writing method and precision optical machinery processing method etc.
Along with LCD (Liquid Crystal Display, LCD) such as mobile phone, Vehicular display device, personal digital assistant (Personal Digital Assistant, PDA) and the expansion of application such as televisor, backlight technology based on light guide plate has been proposed requirements at the higher level, mainly shown: high brightness, low cost, low energy consumption, lightening etc.
As shown in Figure 1, traditional module backlight 10 comprises light source 11, light guide plate 13 and blooming pieces such as reflecting plate 12, diffusion sheet 14 and blast sheet 15 at present.Wherein reflector plate 12 is that the light that will not be scattered imports in the light guide plate 13 again, and diffusion sheet 14 makes light form diffusion and evenly diffusion, eliminates the clear zone that microstructure forms on the light guide plate, and blast sheet 15 plays converging ray, improves the effect of brightness.
Yet from the shooting angle of light beam, angle control is not considered in the design of above-mentioned light guide plate, and therefore the light beam from the outgoing of light guide plate exit facet will deviate from light source rather than vertical exit facet.After the effect of such light beam through bloomings such as diffusion sheet and blast sheets, just can reach actual request for utilization with direction directive LCD perpendicular to exit facet.
Shown in Fig. 2 A and Fig. 2 B, on March 27th, 2003, disclosed No. 20030058382 U.S. Patent application disclosed a kind of module backlight 20, it comprises: a light guide plate 21, its back side forms several astigmatic grooves 22, one is located at the light source 23 in the middle of light guide plate 21 1 sides, one is located at the diffusion sheet 24 of light guide plate 21 tops, one is located at the prismatic lens 25 of light guide plate 21 belows, its lower surface is provided with V-type projection 26, and form a reflectance coating 27 in the lower surface of this prismatic lens 25, wherein, these a plurality of astigmatic grooves 22 are that the center of circle is circular-arc distribution with light source 23, and from light source 23 arrangement far away more close more (shown in Fig. 2 B).From said structure as can be seen, for the output beam that reaches entire aphototropism mould can impinge perpendicularly on the liquid crystal board, module 20 backlight is except that light guide plate 21, the prismatic lens 25 of plated film also need be set below this light guide plate 21, light guide plate 21 tops are provided with diffusion sheet 24, so these module 20 complex structures backlight, and its light source 23 is arranged on the middle side edge of light guide plate 21, is unfavorable for the inhomogeneity adjusting of light guide plate outgoing luminous energy.
Shown in Fig. 3 and Fig. 3 B, on July 24th, 2003, disclosed No. 20030137824 U.S. Patent application disclosed a kind of module backlight 30, it comprises: a rectangle light guide plate 31, its lower surface forms several and is interrupted the astigmatic groove 32 that distributes, one is located at the led light source 33 at light guide plate 31 drift angle places, one is located at the diffuser prism sheet 34 of light guide plate 31 tops, one is located at the reflector plate 35 of light guide plate 31 belows, wherein, these a plurality of astigmatic grooves 32 are that the center of circle is circular-arc distribution with light source 33, and adjacent circular arc equates (shown in Fig. 3 B) at interval, and these module 30 structures backlight are complicated equally: except that light guide plate 31, also need reflector plate 35 and the diffuser prism sheet 34 that has prismatic lens and diffusion sheet function concurrently.
Shown in Fig. 4 A and Fig. 4 B, on September 11st, 2003, disclosed No. 20030169584 U.S. Patent application disclosed a kind of module backlight 40, it comprises: a rectangle light guide plate 41, one led light source 43 is located at light guide plate 41 drift angle places, it is the V-type groove 42 of the circular arc strip distribution at center with led light source 43 that light guide plate 41 lower surfaces form several, and its adjacent V-type groove 42 equates that at interval a prismatic lens 44, of being located at light guide plate 41 tops is located at the reflector plate 45 of light guide plate 41 belows.But this module 40 backlight also needs reflector plate 45 and prismatic lens 44 except that light guide plate, and structure is more complicated still, and the groove 42 of light guide plate 41 reflectings surface is unfavorable for the inhomogeneity adjusting of outgoing beam.
In view of this, being necessary to provide a kind of need not add blooming piece and can make light guide plate that the vertical exit facet of emergent light penetrates and the module backlight of using this kind light guide plate.
[summary of the invention]
First technical matters to be solved by this invention is: a kind of light guide plate is provided, can not need adds blooming piece and the vertical exit facet of emergent light is penetrated.
Second technical matters to be solved by this invention provides a kind of module backlight, and it has above-mentioned light guide plate, thereby can not need add blooming piece and realize making the function of the vertical outgoing of emergent light:
For solving above-mentioned first technical matters, technical scheme provided by the invention is: a kind of light guide plate, and it has a corner cut, and this light guide plate comprises:
One plane of incidence, it is the side of this corner cut;
One exit facet, it is the upper surface of this light guide plate and adjacent with this plane of incidence; With
One reflecting surface relative with this exit facet, wherein, this reflecting surface forms some towards the outside V-type microstructure of protruding that is circular-arc distribution of this light guide plate, this V-type microstructure has the same center of circle and towards this plane of incidence, the cross section of this V-type microstructure is of similar shape, and far away more apart from the plane of incidence, its arranging density is close more, and size is big more.
For solving above-mentioned second technical matters, technical scheme provided by the invention is: a kind of module backlight, and it comprises:
One light source;
With a light guide plate, it has a corner cut, and this light guide plate comprises:
One plane of incidence, it is the side of this corner cut, this light source is near this plane of incidence;
One exit facet, it is the upper surface of this light guide plate and adjacent with this plane of incidence; With
One reflecting surface relative with this exit facet, wherein, this reflecting surface forms some towards the outside V-type microstructure of protruding that is circular-arc distribution of this light guide plate, this V-type microstructure has the same center of circle and towards this plane of incidence, this V-type microstructure cross section is of similar shape, and far away more apart from the plane of incidence, its arranging density is close more, and size is big more.
Compared with prior art, the density arrangement design of light guide plate reflecting surface V-type microstructure of the present invention can better make the emergent light of light guide plate be controlled on the direction of vertical exit facet, has utilized luminous energy to greatest extent.Such light guide plate and the module of being made up of itself and the lateral side wire light source with high brightness backlight have improved brightness on function, structurally removed the bloomings such as reflector plate, diffusion sheet and blast sheet of traditional backlight module, have simplified system, have improved performance.Simultaneously, the present invention can control the shooting angle of emergent light brightness by the angle of regulating the V-type microstructure.
With respect to prior art, the design of reflecting surface microstructure of the present invention is controlled at the emergent light of light guide plate on the direction of vertical exit facet, has utilized luminous energy to greatest extent.Such light guide plate reaches and has improved brightness by its module backlight of forming on function, has structurally removed the bloomings such as reflector plate, diffusion sheet and blast sheet of traditional backlight film group, has simplified system, has improved performance.Simultaneously can be by size of regulating crooked V-type microstructure and the homogeneity that arranging density is controlled emergent light brightness.
[description of drawings]
Fig. 1 is the structural representation of traditional side illumination module backlight.
Fig. 2 A is the module schematic cross-section backlight of No. 20030058382 U.S. Patent application of prior art.
Fig. 2 B is the distribution schematic diagram of the light guide plate reflecting surface microstructure of Fig. 2 A.
Fig. 3 is the module schematic cross-section backlight of No. 20030137824 U.S. Patent application of prior art.
Fig. 3 B is the distribution schematic diagram of the light guide plate reflecting surface microstructure of Fig. 3.
Fig. 4 A is the module schematic cross-section backlight of No. 20030169584 U.S. Patent application of prior art.
Fig. 4 B is the distribution schematic diagram of the light guide plate reflecting surface microstructure of Fig. 4 A.
Fig. 5 is a first embodiment of the invention light conducting plate structure upward view.
Fig. 6 is the schematic cross-section of Fig. 5 along the VI-VI straight line.
Fig. 7 is the enlarged diagram of the local VII of Fig. 6.
Fig. 8 is a second embodiment of the invention light conducting plate structure upward view.
Fig. 9 is a third embodiment of the invention light conducting plate structure upward view.
Figure 10 is a fourth embodiment of the invention light conducting plate structure upward view.
Figure 11 is a fifth embodiment of the invention light guide plate plane of incidence structural representation.
Figure 12 is the synoptic diagram of three kinds of microstructures of the plane of incidence of light guide plate of the present invention.
Figure 13 is the outgoing beam angular distribution figure of first embodiment of the invention light guide plate.
Figure 14 is the normalization light intensity curve figure of first embodiment of the invention along X-axis and Y direction.
Figure 15 is the outgoing beam angular distribution figure of fifth embodiment of the invention light guide plate.
Figure 16 is the normalization light intensity curve figure of fifth embodiment of the invention along X-axis and Y direction.
[embodiment]
Below in conjunction with accompanying drawing and a plurality of embodiment light guide plate of the present invention and module backlight are described in further detail.
Please consult Fig. 5 and Fig. 6 together, first embodiment of the invention provides a square flat light guide plate 50 that is cut a drift angle, and it comprises: a plane of incidence 52, and it is the side of corner cut, this plane of incidence 52 is near light sources 51; One exit facet 53, it is the upper surface of this light guide plate 50 and adjacent with this plane of incidence 52; With a reflecting surface 54 relative with this exit facet 53.The light guide plate 50 of present embodiment is made by polymethylmethacrylate (PMMA) material, and it can be applicable to be of a size of 14.1 inches LCD, and its drift angle that is cut is an isosceles triangle.The light source 51 of present embodiment can adopt light emitting diode.
Wherein, this reflecting surface 54 is formed with and somely protrudes towards light guide plate 50 is outside, and along the V-type microstructure 540 of the circular-arc distribution that is the center of circle with this corner cut summit.As shown in Figure 7, the span of the vertex angle theta 3 of this plurality of V-shaped microstructure 540 is 40～95 degree, and it is respectively 70～90 degree and 15～50 with the span of the formed first and second base angle θ 1 in plane, reflecting surface 54 place, θ 2 and spends.Vertex angle theta 3 preferred 62 degree of this plurality of V-shaped microstructure 540 in the present embodiment, the first and second base angle θ 1, θ 2 are preferably 81 degree and 37 degree.
For improving the outgoing uniformity of light, the size of this plurality of V-shaped microstructure 540 is ascending arranging along the direction that deviates from this plane of incidence 52.Be that its V-type microstructure 540 near the light source place is less, bigger away from the V-type microstructure 540 at light source place.And the distance D between every adjacent V-type microstructure 540 equates, the first base angle θ 1 of promptly adjacent V-type microstructure 540 near the plane of incidence equates with distance between the intersection point of reflecting surface 54.This distance D equals the width of maximum V-type microstructure 540.Be noted that the incremental manner of these V-type microstructure 540 sizes generally is non-linear rule, and will need specific design according to the requirement of light guide plate material behavior and emergent light brightness uniformity.
The width d scope of this plurality of V-shaped microstructure 540 is 1～300 micron, the size of this scope makes that human eye is not easy to find out V-type microstructure 540 on the light guide plate by LCD, can cause the very diffusion sheet of macro-energy loss in the traditional backlight module thereby can remove.Be understandable that according to the raising of processing technology level, width d also can be less than 1 micron.If this light guide plate 50 has the higher phenomenon of local printing opacity brightness, can dwindle the size of V-type microstructure 540 and the arranging density that reduces V-type microstructure 540; Otherwise,, can increase the arranging density of the size and the increase V-type microstructure 540 of V-type microstructure 540 if local printing opacity brightness is on the low side.
For improving capacity usage ratio, reflecting surface 54 can be provided with one and increase anti-film (figure does not show), and it is metal or medium plated film, as aluminium film and silverskin etc.Reflecting surface 54 comprises that the V-type microstructure 540 of protrusion has high reflectivity by technologies such as plated films.In addition, four sides except that the plane of incidence 52 also should have high reflectivity, can increase anti-film (figure does not show) by plating and realize.
Be understandable that the V-type microstructure of some bendings of light guide plate reflecting surface of the present invention has the same center of circle, still, the position in this center of circle also need not special restriction, and the concave curved surface that needs only its V-type microstructure that satisfies some bendings is towards the plane of incidence.
See also Fig. 8, the V-type microstructure 840 of some bendings of light guide plate 80 reflectings surface of the second embodiment of the present invention has the same center of circle, and this center of circle is in the left side of light source 81.And the concave curved surface of the V-type microstructure 840 of these some bendings is towards the plane of incidence 82 of this light guide plate 80, and encases this plane of incidence 82 fully, and the be reflected V-type microstructure 840 of the some bendings of face of the light that all are entered from the plane of incidence 82 reflects.
See also Fig. 9, the V-type microstructure 940 of some bendings of light guide plate 90 reflectings surface of the third embodiment of the present invention has the same center of circle, and this center of circle is on the right side of light source 91.And the concave curved surface of the V-type microstructure 940 of these some bendings is towards the plane of incidence 92 of this light guide plate 90, and encases this plane of incidence 92 fully, and the be reflected V-type microstructure 940 of the some bendings of face of the light that all are entered from the plane of incidence 92 reflects.
See also Figure 10, the light guide plate 100 of the fourth embodiment of the present invention is with the different of light guide plate of first embodiment: the V-type microstructure 104 of the bending on the reflecting surface of this light guide plate 100 (not indicating) is for discontinuous along curve distribution.
The light guide plate of above-mentioned second, third and the 4th embodiment can reach equally and need not add blooming piece and the vertical exit facet of emergent light is penetrated, and has high brightness, the advantage of emergent light good uniformity.
For further improving light source incident uniformity of light, the present invention can be provided with the microstructure of periodic arrangement in the plane of incidence of light guide plate: see also Figure 11, the light guide plate 110 of fifth embodiment of the invention is on the first embodiment light guide plate basis, in the V-type microstructure 114 of the vertical periodic arrangement of the plane of incidence 112 surface working.This V-type microstructure 114 is the isosceles elongate in shape of height size unanimity, and its drift angle span is 50～150 degree, highly is no more than 500 microns.The drift angle of the V-type microstructure 114 of the periodic arrangement of present embodiment is 120 degree, and its width is 0.2 micron.
Be understandable that, as shown in figure 12, the V-type microstructure 123 that microstructure in plane of incidence setting of the present invention can be set to connect airtight the V-type microstructure 121 of period profile or be interrupted period profile, and connect airtight semicircle stud bump microstructure 125 of period profile etc., the perhaps protruding microstructure of other period profile.Above-mentioned microstructure can improve light source incident uniformity of light equally.
Describe the light guide plate of various embodiments of the present invention in detail below in conjunction with experimental data.
See also Figure 13, but the outgoing beam angular distribution figure of its to be first embodiment have only reflecting surface is provided with unilateral illumination light guide plate of microstructure, outgoing in the middle of energy concentrates on substantially as can be seen.
See also Figure 14, its be first embodiment have only reflecting surface be provided with microstructure along X-axis (direction of beam propagation) and the axial normalization light intensity curve figure of Y (the normal beam direction of propagation).They have reflected the angular distribution situation of outgoing beam, as can be seen from Figure 14 along the angle half-breadth of X-axis and Y-axis both direction all in 25 degree, most of light beam penetrates along the direction perpendicular to the light guide plate exit facet, so a slice light guide plate of the present invention and light source just can reach the angle output requirement of traditional backlight module.
See also Figure 15, it is the outgoing beam angular distribution figure that the 5th embodiment reflecting surface and the plane of incidence are provided with the light guide plate of microstructure.Its shooting angle concentrates on the central area substantially as can be seen from Figure 15.
See also Figure 16, it is the normalization light intensity curve figure along X-axis and Y direction that the 5th embodiment reflecting surface and the plane of incidence are provided with microstructure.They have reflected the angular distribution situation of outgoing beam, as can be seen from Figure 16 along the angle half-breadth of X-axis and Y-axis both direction all in 25 degree, most of light beam penetrates along the direction perpendicular to the light guide plate exit facet, so a slice light guide plate of the present invention and light source just can reach the angle output requirement of traditional backlight module.
Be understandable that light guide plate of the present invention can be designed to wedge type.Light guide plate of the present invention and pointolite can be formed the module backlight with high brightness, good uniformity.The light guide plate material is except polymethylmethacrylate (PMMA) polycarbonate (PC) also, or general synthetic resin material such as acrylic.
The design of light guide plate reflecting surface microstructure of the present invention can better make the emergent light of light guide plate be controlled on the direction of vertical exit facet, has utilized luminous energy to greatest extent.Such light guide plate and improved brightness by the module backlight that itself and pointolite are formed on function has structurally been removed the bloomings such as reflector plate, diffusion sheet and blast sheet of traditional backlight module, has simplified system, has improved performance.Simultaneously, the present invention can control the shooting angle of emergent light brightness by the angle of regulating the V-type microstructure.
In addition, those skilled in the art also can do other variations in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.
Claims (14)
1. light guide plate, it has a corner cut, and this light guide plate comprises:
One plane of incidence, it is the side of this corner cut;
One exit facet, it is the upper surface of this light guide plate and adjacent with this plane of incidence; With
One reflecting surface relative with this exit facet, it is some towards the outside V-type microstructure of protruding that is circular-arc distribution of this light guide plate to it is characterized in that this reflecting surface forms, this V-type microstructure has the same center of circle and towards this plane of incidence, the cross section of this V-type microstructure is of similar shape, and it is far away more apart from the plane of incidence, its arranging density is close more, size is big more, it is characterized in that: the drift angle of this V-type microstructure is 40～95 degree, and itself and formed first and second base angles, plane, reflecting surface place are respectively 70～90 degree and 15～50 degree.
2. light guide plate as claimed in claim 1 is characterized in that the V-type microstructure of this circular-arc distribution comprises continuous or discontinuously arranged.
3. light guide plate as claimed in claim 1, the drift angle that it is characterized in that this V-type microstructure are 62 degree, and itself and formed first and second base angles, plane, reflecting surface place are respectively 81 degree and 37 degree.
4. light guide plate as claimed in claim 1, the width range that it is characterized in that this V-type microstructure is 1～300 micron.
5. light guide plate as claimed in claim 1 is characterized in that this plane of incidence is provided with the microstructure of vertical periodic arrangement.
6. light guide plate as claimed in claim 5 is characterized in that this microstructure comprises the V-type microstructure of connecting airtight period profile or being interrupted period profile, or the column type of period profile projection microstructure.
7. light guide plate as claimed in claim 6 is characterized in that the isosceles elongate in shape that this V-type microstructure is the height size unanimity, and its drift angle span is 50～150 degree, highly is no more than 500 microns.
8. light guide plate as claimed in claim 1, the reflecting surface that it is characterized in that this light guide plate is coated with and increases anti-film.
9. light guide plate as claimed in claim 8 is characterized in that this increases anti-film is metal film or non-metallic film.
10. light guide plate as claimed in claim 9 is characterized in that this metal film is aluminium film or silverskin.
11. light guide plate as claimed in claim 1 is characterized in that this light guide plate is polycarbonate, polymethylmethacrylate, perhaps acrylic synthetic resin material constitutes.
12. light guide plate as claimed in claim 1 is characterized in that this light guide plate comprises plate and wedge type.
13. a module backlight, it comprises:
One light source; With
One light guide plate, it has a corner cut, and this light guide plate comprises:
One plane of incidence, it is the side of this corner cut, this light source is near this plane of incidence;
One exit facet, it is the upper surface of this light guide plate and adjacent with this plane of incidence; With
One reflecting surface relative with this exit facet, it is some towards the outside V-type microstructure of protruding that is circular-arc distribution of this light guide plate to it is characterized in that this reflecting surface forms, this V-type microstructure has the same center of circle and towards this plane of incidence, the cross section of this V-type microstructure is of similar shape, and it is far away more apart from the plane of incidence, its arranging density is close more, size is big more, it is characterized in that: the drift angle of this V-type microstructure is 40～95 degree, and itself and formed first and second base angles, plane, reflecting surface place are respectively 70～90 degree and 15～50 degree.
14. module backlight as claimed in claim 13 is characterized in that this light source is a light emitting diode.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100919525A CN100389347C (en) | 2004-12-28 | 2004-12-28 | Plate for guiding light and backlight module |
| US11/265,320 US20060104089A1 (en) | 2004-11-18 | 2005-11-02 | Light guide plate and a backlight module using the same |
| JP2005326547A JP2006189796A (en) | 2004-12-28 | 2005-11-10 | Light guide plate and back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100919525A CN100389347C (en) | 2004-12-28 | 2004-12-28 | Plate for guiding light and backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1797106A CN1797106A (en) | 2006-07-05 |
| CN100389347C true CN100389347C (en) | 2008-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100919525A Active CN100389347C (en) | 2004-11-18 | 2004-12-28 | Plate for guiding light and backlight module |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006189796A (en) |
| CN (1) | CN100389347C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672981B (en) * | 2008-09-12 | 2012-05-30 | 清华大学 | Method for designing and manufacturing light guide plate |
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| US20080049445A1 (en) | 2006-08-25 | 2008-02-28 | Philips Lumileds Lighting Company, Llc | Backlight Using High-Powered Corner LED |
| CN101191945B (en) * | 2006-11-29 | 2010-11-10 | 清华大学 | Backlight module group |
| TWI403942B (en) | 2009-10-22 | 2013-08-01 | Quanta Comp Inc | Optical touch control system |
| CN102053758B (en) * | 2009-11-06 | 2014-07-23 | 广达电脑股份有限公司 | Optical touch system |
| CN102563540A (en) * | 2012-01-30 | 2012-07-11 | 上海向隆电子科技有限公司 | Light guide plate and illuminating module thereof |
| CN102998738B (en) * | 2012-12-11 | 2015-05-27 | 京东方科技集团股份有限公司 | Light guide plate (LGP), backlight containing same and display device |
| CN104421747A (en) * | 2013-08-21 | 2015-03-18 | 鸿富锦精密工业（深圳）有限公司 | Light source device |
| JP6657852B2 (en) * | 2015-11-27 | 2020-03-04 | オムロン株式会社 | Display device |
| CN117250685A (en) * | 2016-11-18 | 2023-12-19 | 康宁股份有限公司 | Microstructured light guide plate and device comprising same |
| CN107728250A (en) * | 2017-10-20 | 2018-02-23 | 江西合力泰科技有限公司 | A kind of mobile phone backlight module and its manufacture method |
| CN112987395B (en) * | 2019-12-17 | 2024-03-08 | 中强光电股份有限公司 | Backlight module |
| WO2023151087A1 (en) * | 2022-02-14 | 2023-08-17 | 京东方科技集团股份有限公司 | Backlight assembly and display apparatus |
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|---|---|---|---|---|
| CN1444078A (en) * | 2002-03-11 | 2003-09-24 | 株式会社西铁城电子 | Luminous Panel for display device |
| JP2004071413A (en) * | 2002-08-08 | 2004-03-04 | Hitachi Maxell Ltd | Manufacturing method of planar light source and its molding die |
| CN1490649A (en) * | 2002-10-16 | 2004-04-21 | 胜华科技股份有限公司 | Light conducting structure of negative module |
-
2004
- 2004-12-28 CN CNB2004100919525A patent/CN100389347C/en active Active
-
2005
- 2005-11-10 JP JP2005326547A patent/JP2006189796A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1444078A (en) * | 2002-03-11 | 2003-09-24 | 株式会社西铁城电子 | Luminous Panel for display device |
| JP2004071413A (en) * | 2002-08-08 | 2004-03-04 | Hitachi Maxell Ltd | Manufacturing method of planar light source and its molding die |
| CN1490649A (en) * | 2002-10-16 | 2004-04-21 | 胜华科技股份有限公司 | Light conducting structure of negative module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672981B (en) * | 2008-09-12 | 2012-05-30 | 清华大学 | Method for designing and manufacturing light guide plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1797106A (en) | 2006-07-05 |
| JP2006189796A (en) | 2006-07-20 |
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