CN1549018A - Light conducting panel configuration of sidelight back light module and liquid crystal display device - Google Patents
Light conducting panel configuration of sidelight back light module and liquid crystal display device Download PDFInfo
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- CN1549018A CN1549018A CNA031238661A CN03123866A CN1549018A CN 1549018 A CN1549018 A CN 1549018A CN A031238661 A CNA031238661 A CN A031238661A CN 03123866 A CN03123866 A CN 03123866A CN 1549018 A CN1549018 A CN 1549018A
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Abstract
The light guiding board configuration includes one main light guiding board with at least one incident light end plane, one back side and one outgoing light plane. The incident light end plane is not perpendicular to the incident light beam, the back side possesses light scattering pattern for guiding the reflected light inside the light guiding board to the outgoing light plane. The incident angle of light to the light guiding board is greater than the critical total reflection angle, and this increases the light path length of light inside the light guiding board, raises the probability of the reflected light inside the light guiding board to be projected onto the light scattering pattern and raises the light outgoing efficiency of the light guiding board.
Description
Technical field
The present invention relates to a kind of light guide plate configuration of backlight modular unit; Particularly relate to a kind of light guide plate configuration of side light type backlight modular unit and have the LCD of this side light type backlight modular unit.
Background technology
In recent years, the demand of display panels greatly increased, and high briliancy and high contrast and short reaction time are for choosing the display panels necessary conditions at present.General display panels uses backlight modular unit as light-source system, as shown in Figure 1, the schematic cross-section of a prior art backlight modular unit, it comprises a light source 11, a light guide plate 12, a reflection shield 13 and a reflecting piece 14.Light guide plate 12 has the incident end face 123 of exit facet 121, a back side 122 and the light input usefulness of light output usefulness, is vertical plane with respect to incident beam, and is positioned at light source 11 1 sides.122 inside, the light guide plate back side have a plurality of boss points 124.The emission light of light source 11 enters light guide plate 12 inside and carries out repeatedly total reflection, as light beam B through being projected to incident end face 123.When the so far a little boss of the folded light beam A of light guide plate 12 inside projection put 124, be scattered and be directed to exit facet 121 outputs, as light beam A 1, become the luminous source of backlight modular unit.Reflection shield 13 ambient light sources 11 are so that light source 11 back side emitted light beams are through reflection shield 13 reflections, with the incident end face 123 that is incident upon light guide plate 12.Reflecting piece 14 is located at 122 outsides, light guide plate 12 back sides, to reflect the light beam that penetrates from light guide plate 12 back sides 122.
As mentioned above, light beam utilizes folded light beam to be incident upon on the boss point 124 of 122 inside, light guide plate 12 back sides in the outgoing mode of light guide plate 12 inside, destroys its total reflection ability in light guide plate 12 inside, makes the light beam can be by exit facet 121 outgoing.The material of prior art light guide plate 12 is an acryl, its cirtical angle of total reflection is 41.8 °, light source 11 emitted light beams mostly are projected to the incident end face 123 that light guide plate 12 is vertical plane with parallel beam from air, and its incident angle in light guide plate 12 inside often can't be greater than the cirtical angle of total reflection.Therefore after light beam enters light guide plate 12 inside, mostly advance in a light path mode, as easy as rolling off a log bringing out from one of the relative incident end face 123 of light guide plate penetrated, and causes the loss of light source.
In view of the above, demand providing a kind of improved light conducting plate structure moulding urgently, to overcome the defective of light guide plate in the prior art.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of light guide plate configuration of side light type backlight modular unit, by the light guide plate incident end face of the light input usefulness of isomorphism type not, make incident light be projected to light guide plate inside with angle greater than the light guide plate cirtical angle of total reflection, to improve light path the prolonging property of light beam in light guide plate inside, increase light and be incident upon the chance of light guide plate back side light scattering pattern, and then the light outgoing efficient of light guide plate is improved.
Another object of the present invention is to provide a kind of light guide plate configuration of side light type backlight modular unit, by the light guide plate incident end face of the light input usefulness of isomorphism type not, increase the light path of projection light in light guide plate prolongation property, so that the light utilization efficiency of light guide plate and the raising of light output uniformity coefficient, and then the display panel briliancy in conjunction with backlight modular unit of the present invention is increased.
According to above-described purpose, the invention provides a kind of light guide plate configuration of side light type backlight modular unit, it comprises a light guide plate main body, exit facet with at least one incident end face, a back side and light output usefulness of light input usefulness, wherein this incident end face is non-perpendicular with respect to incident beam, reach this back side and have a light scattering pattern, for the exit facet output from then on of the reflected light in the guiding light guide plate.See through light guide plate and be non-perpendicular incident end face, make light be projected to the cirtical angle of total reflection of the angle of light guide plate inside greater than light guide plate, to improve the light path of light beam in light guide plate prolongation property, and then increase the chance that the light guide plate reflects light is incident upon the light scattering pattern, to improve the light outgoing efficient of light guide plate.
By the difform incident end face Mechanical Builds of light guide plate of the present invention, can improve the light utilization efficiency and the light output uniformity coefficient thereof of light guide plate, and then can improve display panel briliancy in conjunction with backlight modular unit of the present invention.Moreover the present invention is applied to backlight modular unit with the light guide plate that different change of configuration are provided, and can improve the light utilization efficiency and the light output uniformity coefficient of backlight modular unit under the situation that does not increase the backlight modular unit assembly, and the display panel briliancy is improved.Therefore, backlight modular unit manufacturing of the present invention is simple, does not increase manufacturing cost simultaneously.
Purpose of the present invention and plurality of advantages are by the detailed description of following specific embodiment, and accompanying drawing shown in the reference, will be tending towards clear.
Description of drawings
Fig. 1 is a traditional backlight modular unit schematic cross-section;
Fig. 2 is the backlight modular unit schematic cross-section of one specific embodiment according to the present invention;
Fig. 3 A to the three G are the various variation instance of light guide plate configuration of the present invention;
Fig. 4 is the Guan Weitu of light beam in the total reflection number of times of the various light guide plate configurations inside of Fig. 3 A to Fig. 3 G and the luminous energy that is accepted;
Fig. 5 A to Fig. 5 J is for showing the various variation instance of light guide plate incident end face configuration of the present invention;
Fig. 6 A to Fig. 6 J is for showing the various variation instance of light guide plate incident end face configuration of the present invention;
Fig. 7 A to Fig. 7 J is for showing the various variation instance of light guide plate incident end face configuration of the present invention;
Fig. 8 A to Fig. 8 F is the various variation instance of light guide plate configuration of the present invention;
Fig. 9 A to Fig. 9 F is the various variation instance of light guide plate configuration of the present invention;
Figure 10 is for using a LCD schematic cross-section of the present invention's one backlight modular unit;
Figure 11 is a LCD decomposing schematic representation in conjunction with backlight modular unit of the present invention; And
Figure 12 is the decomposing schematic representation of a liquid crystal indicator with LCD of Figure 11.
Symbol description among the figure
11 light sources
12 light guide plate
13 reflection shields
14 reflecting piece
121 exit facets
122 back sides
123 incident end faces
124 boss point
20 light guide plate main bodies
21,22 incident end faces
23 back sides
24 exit facets
25 light sources
26 reflection shields
27 reflecting piece
28 diffusion sheets
29 liquid crystal panels
30 protective sheet
31 prismatic lenses
200 first frameworks
The 201a screw
210 second frameworks
The 211a screw
220 bolts
300 LCD
500 back side frameworks
The 501a screw
512 bolts
520 positive frameworks
Embodiment
The light guide plate configuration of a kind of side light type backlight modular unit provided by the invention, be to utilize at least one incident end face with light guide plate light input usefulness to be designed to be non-perpendicular not isomorphism type with respect to incident beam, be incident to the cirtical angle of total reflection of the incident angle of light guide plate inside after allowing light beam be projected to incident end face greater than light guide plate, so that light beam can be carried out repeatedly total reflection in light guide plate, prolong the light path of light beam in light guide plate, to increase the chance that reflected light is projected to the light guide plate of the present invention back side one light scattering pattern, reflected light is increased via the probability that light scattering pattern scattering guiding exports an exit facet of light guide plate to, and then improve light guide plate the utilization factor of light source and the uniformity coefficient of light output.
The light guide plate configuration of side light type backlight modular unit of the present invention mainly comprises a light guide plate main body, exit facet with at least one incident end face, a back side and light output usefulness of light input usefulness, wherein this incident end face is non-perpendicular with respect to incident beam, reach this back side and have a light scattering pattern, for the exit facet output from then on of the reflected light in the guiding light guide plate main body.
Below illustrate that by Fig. 2 the light guide plate configurational energy of side light type backlight modular unit of the present invention improves the principle of light guide plate to the uniformity coefficient of the utilization factor of light source and light output.Fig. 2 is a specific embodiment of the light guide plate configuration of side light type backlight modular unit of the present invention, and it comprises the light guide plate main body 20 of a rectangle, has two incident end faces 21 of light input usefulness and an exit facet 24 of 22, one back side 23 and light output usefulness.The incident end face 21 and 22 of light guide plate main body 20 is the dome face of symmetry each other, and 23 inside, the light guide plate back side have a light scattering pattern, form by a plurality of protruded objects 231, these a little protruded objects 231 make the reflected light in the light guide plate export exit facet 24 to via protruded object 231 scatterings guiding in order to destroy the catoptrical total reflection ability in the light guide plate.The material that light guide plate main body 20 uses has high light transmittance, for example acryl resin (acrylic resin) as polymethylmethacrylate (polymethyl methacrylate) (PMMA) (be commonly called as acryl), polycarbonate resin (polycarbonate resin) and glass.Light guide plate main body 20 with the acryl material is an example, its optical index is 1.414, can obtain its cirtical angle of total reflection is 41.8 °, the incident angle θ that is incident to light guide plate main body 20 via incident end face 21 and 22 when light beam is controlled at 41.8 °＜θ＜48.2 °, then can make light beam in light guide plate main body 20 inner execution total reflections, make its light path prolongation property better, and then the raising folded light beam is projected to the probability of protruded object 231, and increase the chance of folded light beam, and then improve utilization factor and the light output uniformity coefficient thereof of light guide plate to light source via exit facet 24 outputs.The present invention is the dome face with the incident end face 21 and 22 of light guide plate main body 20, the incident angle that the most of parallel beams of may command are incident to light guide plate main body 20 inside is in 41.8 °＜θ＜48.2 °, make light beam can carry out total reflection in light guide plate main body 20 inside, have preferable light path prolongation property, and increase the probability that folded light beam is projected to protruded object 231.Moreover incident end face 21 and 22 is the dome face of symmetry each other, when light beam is advanced in light guide plate main body 20 inside, also can return by the dome face internal reflection that is projected to two incident end faces 21 and 22, and unlikely from incident end face 21 and 22 outgoing.
Fig. 3 A to Fig. 3 G is for showing the rectangular light guide plate schematic cross-section of the different incident end face configurations of various tools, and its incident end face is vertical plane, tapered plane, dome face, recessed disc, anistree face, continuous little disc (convex row curved surface), a disc (four minutes convex surfaces) of four minutes successively with respect to projecting beam.Fig. 4 demonstrates light beam at the total reflection number of times of the various light guide plate inside of Fig. 3 A to Fig. 3 G and the luminous energy size that is accepted after being projected to light guide plate, when wherein being recessed disc with incident end face, can receive more luminous energy, promptly incide more light beam, and incident end face is when being the dome face, and light beam is in the inner total reflection that can carry out more repeatedly of light guide plate.On the other hand, when the incident end face of light guide plate was vertical plane, light beam was in the total reflection least number of times of light guide plate inside, and light beam at the total reflection number of times of the light guide plate inside that is non-perpendicular incident end face all greater than the light guide plate that is the vertical plane incident end face.Based on The above results, the present invention promptly utilizes the various incident end faces that are non-perpendicular not isomorphism type, after making most of parallel beams be projected to the light guide plate incident end face, its light beam is incident to the incident angle of light guide plate inside can be greater than the cirtical angle of total reflection of light guide plate, can carry out total reflection, increase the total reflection number of times of light beam in light guide plate inside, prolong the light path of light beam in light guide plate inside, and improve the probability that light beam is projected to the light scattering pattern, and then improve the light source utilization factor and the light output uniformity coefficient thereof of light guide plate.Thus, the display panel briliancy in conjunction with backlight modular unit of the present invention is increased.
Fig. 5 A to Fig. 5 J and Fig. 6 A to Fig. 6 J and Fig. 7 A to Fig. 7 J be for the light guide plate that shows side light type backlight modular unit of the present invention is the various variation instance of non-perpendicular incident end face configuration, comprises tapered plane, taper surface, dome face, convex surface, concave curved surface, convex row curved surface, concave curved surface, polygon face, four minutes a cambered surface, prism facets, cascaded surface, symmetric double cascaded surface and concavo-convex irregular etc. continuously.It is noted that, light guide plate of the present invention is non-perpendicular incident end face configuration and is not limited to above-mentioned various variation instance, and all incident lights that can make all are fit to as light guide plate configuration of the present invention at the incident angle of light guide plate inside non-perpendicular the incident end face of being greater than the cirtical angle of total reflection of light guide plate.In addition, light guide plate main body of the present invention is except cuboid, can also be sphenoid (wedge-type body) or prismatoid (not shown), shown in Fig. 8 A to Fig. 8 F, wherein light guide plate main body only has one and is non-perpendicular incident end face, and can be symmetrical folding wedge body, shown in Fig. 9 A to Fig. 9 F, wherein two incident end face configurations can be symmetrical each other.
On the other hand, the light scattering pattern of light guide plate main body of the present invention also can be formed at outside, the light guide plate back side except being formed on inside, the light guide plate back side.Simultaneously the exit facet surface design of light guide plate can be become prism facets, the emergent light exit direction is concentrated in the angular field of view of display panel of combination.Side light type backlight modular unit of the present invention is applicable to monolateral or bilateral side light type backlight origin system, and it can be for the back light source system of doing illuminated keyboard, mobile phone display panel, display panels, television image display panels, hand held digital assistants (PDA) display panel and penetration scanner etc.For example, shown in Figure 10, a LCD schematic cross-section of use backlight modular unit of the present invention, it comprises a light guide plate main body 20, a light source 25, a reflection shield 26, a reflecting piece 27, a diffusion sheet 28 and a liquid crystal panel 29.Light guide plate main body 20 has the back side 23 and the exit facet 24 that at least one incident end face 21 and/or 22, has the light scattering pattern of protruded object 231 compositions.Light source 25 is located at a side of at least one incident end face 21 and/or 22, and reflection shield 26 coats around the light source 25, and an opening part that makes light source 25 is towards incident end 21, and reflection shield 26 is with the emission beam reflection at light source 25 back sides.Reflecting piece 27 is located at light guide plate main body 20 belows, for being reflected back into light guide plate main body 20 inside from the light of the back side 23 outgoing of light guide plate main body 20.Diffusion sheet 28 will be spread through exit facet 24 emitted light beams, so that the emission light beam of backlight modular unit has uniformity coefficient, and liquid crystal panel 29 is located at diffusion sheet 28 tops.Again, light guide plate main body 20 shown in Figure 10 also can be the various variation instance shown in Fig. 3 A to Fig. 3 G of the present invention, Fig. 5 A to Fig. 5 J, Fig. 6 A to Fig. 6 J, Fig. 7 A to Fig. 7 J, the 8th A figure to the eight F figure and Fig. 9 A to Fig. 9 F.
Figure 11, for using a LCD decomposing schematic representation of side light type backlight modular unit of the present invention, wherein for making accompanying drawing too not complicated, some of side light type backlight modular unit form members for example light source and the reflection shield that coats light source be not shown among the figure through omitting, the light scattering pattern at the back side 23 of light guide plate main body 20 also is not shown among the figure.LCD (liquid crystaldisplay) structure that Figure 11 shows comprises that superimposed successively from bottom to up one first framework 200, a reflecting piece 27, an incident end face 21 are the light guide plate 20 of dome face, a protective sheet (protection sheet) 30, one prismatic lens 31, a diffusion sheet 28, a liquid crystal panel (liquid crystal panel) 29 and 1 second framework 210.One side of first framework 200 has a plurality of screw 201a, the same side of second framework 210 has the screw 201a that a plurality of screw 211a are aligned in first framework 200 equally, by fixture for example bolt 220 pass the screw 211a of second framework 210 and the screw 201a of first framework 200, with together with each component composition of LCD.Moreover, prismatic lens 26 concentrates in the angular field of view of LCD in order to the emission light beam with light guide plate 20, to improve the luminosity of LCD, diffusion sheet 28 is in order to the emission beam spread with light guide plate 20, to improve the luminous uniformity coefficient of LCD.The overlapping order of each member of LCD shown in Figure 11 can be changed mutually, for example diffusion sheet 28 can with the location swap of protective sheet 30, prismatic lens 31 tops also can add another prismatic lens (not shown), wherein the prism arrangement direction of digonous eyeglass is orthogonal, also can omit prismatic lens 31, and exit facet 24 surface design of light guide plate 21 are become prism facets.
Figure 12 has a liquid crystal indicator decomposing schematic representation of LCD shown in Figure 11 300, and wherein a LCD 300 and a back housing 500 and a front housing 520 combine.One side of back housing 500 has the side screw 211a that a plurality of screw 501a are aligned in second framework 210, by fixture for example bolt 512 pass screw 501a, 211a, LCD 300 and back housing 500 are combined.Front housing 520 engages with back housing 500 by the engaging mode again, so that LCD 300 is contained between the two.Again, light guide plate main body 20 shown in Figure 11 also can be the various variation instance shown in Fig. 3 A to Fig. 3 G of the present invention, Fig. 5 A to Fig. 5 J, Fig. 6 A to Fig. 6 J, Fig. 7 A to Fig. 7 J, the 8th A figure to the eight F figure and Fig. 9 A to Fig. 9 F.
The present invention is applied to backlight modular unit with the light guide plate that different change of configuration are provided, and can improve the light utilization efficiency and the light output uniformity coefficient of backlight modular unit under the situation that does not increase the backlight modular unit assembly, and the display panel briliancy is improved.Backlight modular unit manufacturing of the present invention is simple, does not increase manufacturing cost simultaneously.
The above is specific embodiments of the invention only, is not in order to limit claim of the present invention; All other do not break away from the equivalence of being finished under the disclosed spirit and changes or modification, all should be included in the described claim.
Claims (27)
1. the light guide plate configuration of a side light type backlight modular unit is characterized in that, comprising:
One light guide plate main body, exit facet with at least one incident end face, a back side and light output usefulness of light input usefulness, wherein this incident end face is non-perpendicular with respect to incident beam, reaches this back side and has a light scattering pattern, exports from this exit facet for the reflected light in this light guide plate main body of guiding.
2. the light guide plate configuration of side light type backlight modular unit as claimed in claim 1 is characterized in that, above-mentioned light guide plate main body be selected from following any one: cuboid, sphenoid, prismatoid and symmetric double sphenoid.
3. the light guide plate configuration of side light type backlight modular unit as claimed in claim 1 is characterized in that, above-mentioned light guide plate main body has two these incident end faces.
4. the light guide plate configuration of side light type backlight modular unit as claimed in claim 3 is characterized in that, two above-mentioned incident end faces each other the symmetry non-perpendicular.
5. the light guide plate configuration of side light type backlight modular unit as claimed in claim 1, it is characterized in that, the non-perpendicular face of this of above-mentioned incident end face be selected from following any one: tapered plane, taper surface, dome face, convex surface, concave curved surface, convex row curved surface, concave curved surface, polygon face, four minutes a cambered surface, prism facets, cascaded surface, symmetric double cascaded surface and concavo-convex irregular continuously.
6. the light guide plate configuration of side light type backlight modular unit as claimed in claim 3, it is characterized in that, the non-perpendicular face of this of above-mentioned incident end face be selected from following any one: tapered plane, taper surface, dome face, convex surface, concave curved surface, convex row curved surface, concave curved surface, polygon face, four minutes a cambered surface, prism facets, cascaded surface, symmetric double cascaded surface and concavo-convex irregular continuously.
7. the light guide plate configuration of side light type backlight modular unit as claimed in claim 4, it is characterized in that, the non-perpendicular face of this of above-mentioned incident end face be selected from following any one: tapered plane, taper surface, dome face, convex surface, concave curved surface, convex row curved surface, concave curved surface, polygon face, four minutes a cambered surface, prism facets, cascaded surface, symmetric double cascaded surface and concavo-convex irregular continuously.
8. the light guide plate configuration of side light type backlight modular unit as claimed in claim 2, it is characterized in that, the non-perpendicular face of this of above-mentioned incident end face be selected from following any one: tapered plane, taper surface, dome face, convex surface, concave curved surface, convex row curved surface, concave curved surface, polygon face, four minutes a cambered surface, prism facets, cascaded surface, symmetric double cascaded surface and concavo-convex irregular continuously.
9. the light guide plate configuration of side light type backlight modular unit as claimed in claim 2 is characterized in that, above-mentioned light guide plate main body has two these incident end faces.
10. the light guide plate configuration of side light type backlight modular unit as claimed in claim 9 is characterized in that, two above-mentioned incident end faces each other the symmetry non-perpendicular.
11. the light guide plate configuration of side light type backlight modular unit as claimed in claim 9, it is characterized in that, the non-perpendicular face of this of above-mentioned incident end face be selected from following any one: tapered plane, taper surface, dome face, convex surface, concave curved surface, convex row curved surface, concave curved surface, polygon face, four minutes a cambered surface, prism facets, cascaded surface, symmetric double cascaded surface and concavo-convex irregular continuously.
12. the light guide plate configuration of side light type backlight modular unit as claimed in claim 10, it is characterized in that, the non-perpendicular face of this of above-mentioned incident end face be selected from following any one: tapered plane, taper surface, dome face, convex surface, concave curved surface, convex row curved surface, concave curved surface, polygon face, four minutes a cambered surface, prism facets, cascaded surface, symmetric double cascaded surface and concavo-convex irregular continuously.
13. the light guide plate configuration of side light type backlight modular unit as claimed in claim 1 is characterized in that, above-mentioned light scattering pattern is formed at this inside, back side.
14. the light guide plate configuration of side light type backlight modular unit as claimed in claim 1 is characterized in that, above-mentioned light scattering pattern is formed at this outside, back side.
15. the light guide plate configuration of side light type backlight modular unit as claimed in claim 1 is characterized in that, above-mentioned light scattering pattern comprises a plurality of protruded objects.
16. the light guide plate configuration of side light type backlight modular unit as claimed in claim 13 is characterized in that, above-mentioned light scattering pattern comprises a plurality of protruded objects.
17. the light guide plate configuration of side light type backlight modular unit as claimed in claim 14 is characterized in that, above-mentioned light scattering pattern comprises a plurality of protruded objects.
18. the light guide plate configuration of side light type backlight modular unit as claimed in claim 1 is characterized in that, a surface of above-mentioned exit facet is a prism facets.
19. the light guide plate configuration of side light type backlight modular unit as claimed in claim 2 is characterized in that, a surface of above-mentioned exit facet is a prism facets.
20. a side light type backlight modular unit is characterized in that, comprising:
One light guide plate main body, exit facet with at least one incident end face, a back side and light output usefulness of light input usefulness, wherein this incident end face is non-perpendicular with respect to incident beam, reaches this back side and has a light scattering pattern, exports from this exit facet for the reflected light in this light guide plate main body of guiding;
At least one light source is positioned at this incident end face one side of this light guide plate;
One reflection shield is coated on around this light source, so that an opening part of this light source is towards this incident end face of this light guide plate main body;
One reflecting piece is positioned at this light guide plate main body below; And
One diffusion sheet is positioned at this light guide plate main body top.
21. side light type backlight modular unit as claimed in claim 20 is characterized in that, above-mentioned light guide plate main body be selected from following any one: cuboid, sphenoid, prismatoid and symmetric double sphenoid.
22. side light type backlight modular unit as claimed in claim 20, it is characterized in that, the non-perpendicular face of this of above-mentioned incident end face be selected from following any one: tapered plane, taper surface, dome face, convex surface, concave curved surface, convex row curved surface, concave curved surface, polygon face, four minutes a cambered surface, prism facets, cascaded surface, symmetric double cascaded surface and concavo-convex irregular continuously.
23. side light type backlight modular unit as claimed in claim 21, it is characterized in that, the non-perpendicular face of this of above-mentioned incident end face be selected from following any one: tapered plane, taper surface, dome face, convex surface, concave curved surface, convex row curved surface, concave curved surface, polygon face, four minutes a cambered surface, prism facets, cascaded surface, symmetric double cascaded surface and concavo-convex irregular continuously.
24. a LCD is characterized in that, comprising:
One liquid crystal panel; And
One side light type backlight modular unit, be positioned at this liquid crystal panel below, this side light type backlight modular unit comprises a light guide plate main body, at least one light source, one reflection shield, one reflecting piece and a diffusion sheet, wherein this light guide plate main body has at least one incident end face of light input usefulness, one exit facet of one back side and light output usefulness, wherein this incident end face is non-perpendicular with respect to incident beam, and this back side has a light scattering pattern, export from this exit facet for the reflected light in this light guide plate main body of guiding, this light source is positioned at this incident end face one side of this light guide plate main body, this reflection shield be coated on this light source around, so that an opening part of this light source is towards this incident end face of this light guide plate main body, reach the below that this reflecting piece is positioned at this light guide plate main body, and this diffusion sheet is positioned at this light guide plate main body top.
25. LCD as claimed in claim 24 is characterized in that, above-mentioned light guide plate main body be selected from following any one: cuboid, sphenoid, prismatoid and symmetric double sphenoid.
26. LCD as claimed in claim 24, it is characterized in that, non-perpendicular of this of above-mentioned incident end face from following any one: tapered plane, taper surface, dome face, convex surface, concave curved surface, convex row curved surface, concave curved surface, polygon face, four minutes a cambered surface, prism facets, cascaded surface, symmetric double cascaded surface and concavo-convex irregular continuously.
27. LCD as claimed in claim 25, it is characterized in that, the non-perpendicular face of this of above-mentioned incident end face be selected from following any one: tapered plane, taper surface, dome face, convex surface, concave curved surface, convex row curved surface, concave curved surface, polygon face, four minutes a cambered surface, prism facets, cascaded surface, symmetric double cascaded surface and concavo-convex irregular continuously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031238661A CN100552507C (en) | 2003-05-21 | 2003-05-21 | The light guide plate configuration and the LCD of side light type backlight modular unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031238661A CN100552507C (en) | 2003-05-21 | 2003-05-21 | The light guide plate configuration and the LCD of side light type backlight modular unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1549018A true CN1549018A (en) | 2004-11-24 |
| CN100552507C CN100552507C (en) | 2009-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031238661A Expired - Fee Related CN100552507C (en) | 2003-05-21 | 2003-05-21 | The light guide plate configuration and the LCD of side light type backlight modular unit |
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| CN (1) | CN100552507C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012167484A1 (en) * | 2011-06-08 | 2012-12-13 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
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2003
- 2003-05-21 CN CNB031238661A patent/CN100552507C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012167484A1 (en) * | 2011-06-08 | 2012-12-13 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
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| Publication number | Publication date |
|---|---|
| CN100552507C (en) | 2009-10-21 |
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