CN203981914U - The uniform light guide plate of a kind of emitting brightness - Google Patents
The uniform light guide plate of a kind of emitting brightness Download PDFInfo
- Publication number
- CN203981914U CN203981914U CN201420306488.6U CN201420306488U CN203981914U CN 203981914 U CN203981914 U CN 203981914U CN 201420306488 U CN201420306488 U CN 201420306488U CN 203981914 U CN203981914 U CN 203981914U
- Authority
- CN
- China
- Prior art keywords
- guide plate
- light guide
- light
- incidence surface
- emitting brightness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000003287 optical effect Effects 0.000 abstract description 5
- 101100117236 Drosophila melanogaster speck gene Proteins 0.000 description 5
- 230000007812 deficiency Effects 0.000 description 5
- 238000007598 dipping method Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
Landscapes
- Planar Illumination Modules (AREA)
Abstract
The uniform light guide plate of emitting brightness, relates to light guide plate.Comprise the exiting surface and the reflective surface that are oppositely arranged, a wherein common end of exiting surface and reflective surface is the incidence surface that light relative with light source, light source incides light guide plate; The end face relative with incidence surface is rear end face; On exiting surface, from incidence surface, stretch to and in light guide plate, be shaped with numerous grooves, in described light guide plate, for the edge of light guide plate, the length that described groove stretches in light guide plate from incidence surface is 1/4th to 1/3rd of incidence surface and rear end face vertical range; Adjacent described groove is every at regular intervals.It is even that the utility model can be realized light guide plate leading portion, light guide plate stage casing and light guide plate back segment emitting brightness, and especially the emitting brightness of light guide plate back segment improves 15% left and right; Meanwhile, light inlet side dark space is very little.Realized the unification that light guide plate optical quality is good Yu number of light sources is few, power consumption is few.Be applicable to large-size light-conducting plate.
Description
Technical field
The utility model relates to light guide plate, the uniform light guide plate of espespecially a kind of emitting brightness.
Background technology
Backlight is one of critical component of display product, and televisor, computing machine and mobile phone etc. all be unable to do without and use backlight.Along with the continuous lifting of display product performance, more and more high to the requirement of backlight, as even, low-cost in lightweight, slimming, low power consumption, high brightness, bright dipping etc.Backlight is mainly comprised of light source and light guide plate, light guide plate is born the function that light source is changed into the area source of high brightness and uniform luminance, therefore, the quality impact of the product confrontation light guide plate of backlight greatly, require light guide plate high-quality, under equal optical quality, can realize low power consumption and low-cost etc.
Fig. 1 is a kind of optical light guiding plate of side of prior art, light guide plate 10 comprises incidence surface 11, exiting surface and reflection horizon, exiting surface is relative with reflection horizon, as exiting surface is positioned at the upper surface of light guide plate 10, reflection horizon is positioned at the bottom of the below of light guide plate 10, incidence surface 11 is positioned at a side of light guide plate 10, facing to incidence surface 11, a plurality of LED light sources 12 are installed, the light of LED light source 12 incides light guide plate 10 from incidence surface 11, through the light transmitting in reflection horizon and all light on light guide plate surface, process, thereby light penetrates and forms planar light source from exiting surface.Because the light of each LED light source 12 outgoing is not parallel rays, and be little three-dimensional wide-angle, be outwards loose angle of little angle, therefore the scope that each LED light source 12 incides light guide plate 10 is subject to certain limitation.Setting is followed successively by light guide plate leading portion, light guide plate stage casing and light guide plate back segment in from light inlet side toward light guide plate.Thus, the light that adjacent LED light source 12 is mapped near light guide plate 10 leading portions (being incident place of light) there will be stack district's (claiming again speck 13), simultaneously, light guide plate 10 leading portions also there will be LED light source 12 all penetrate less than region (claiming again dark space 14), especially when the spacing of adjacent LED light source 12 is larger, dark space 14 is very large, causes the leading portion brightness of light guide plate 10 very inhomogeneous.
As shown in Figure 2, in order to improve the very inhomogeneous drawback of light guide plate 10 leading portion brightness, avoid speck 13 as far as possible and dwindle dark space 14, the incidence surface of light guide plate 10 11 is made to zigzag.Although the incident scope of LED light source 12 is suitable with the incident scope of the LED light source 12 of Fig. 1, but the light of 11 pairs of incidents of jagged incidence surface can produce refraction, to expand the outgoing scope of light, reduce the dark space 14 of light guide plate 10, the brightness uniformity of light guide plate 10 leading portions makes moderate progress.
How jagged incidence surface 11 is constructed, how to be arranged, and could produce optimum efficiency Chinese patent and disclose two kinds of technical schemes.A kind of is publication number CN101922680A disclosed " having the light guide plate of V-structure and the backlight template that comprises this light guide plate " (application number 201010275280.9), and a kind of is publication number CN202522727U disclosed " light guide plate light guide structure " (application number 201220183711.3).
Fig. 3 is publication number CN101922680A disclosed " having the light guide plate of V-structure and the backlight template that comprises this light guide plate " schematic diagram.Wherein, the upper surface of light guide plate is exiting surface, and the left surface of light guide plate or/and be incidence surface 11, is tubular light source shown in LED light source 12(figure) can one-sidedly set, also can configure from the left and right sides simultaneously, on exiting surface, from left surface to right flank, open the V-type groove of vertical bar shape processed.Visible, in this technical scheme, V-type groove starts to extend to the end of exiting surface always from incidence surface, by the degree of depth and the gradient of V-type groove, controls amount of light.The V-type groove structure that this V-type groove starts to extend at exiting surface from incidence surface always makes the dark space of light guide plate leading portion very little, but, also exist obviously not enough, that is exactly that light guide plate stage casing, light guide plate back segment emitting brightness die down, especially in light guide plate back segment emitting brightness, die down larger, there is larger difference in light guide plate leading portion and light guide plate back segment emitting brightness, does not meet the quality requirements of high-quality light guide plate.
Fig. 4 is CN202522727U disclosed " light guide plate light guide structure " schematic diagram.Light inlet side in light guide plate arranges broached-tooth design, described broached-tooth design is included in evenly spaced a plurality of depressions of light guide plate light inlet side, the cross section of described depression is U-shaped, forms projection, 1/3rd to 1/2nd of the spacing that the length of depression is adjacent recessed between adjacent recessed.The length of this U-shaped groove is short, very short from putting in light inlet lateral guide tabula rasa.The leading portion of this light guide plate, stage casing and back segment emitting brightness are even, especially the emitting brightness of light guide plate back segment can obviously not die down, but also there is deficiency, that be exactly due to light guide plate light inlet side astigmatism a little less than, dark space is obvious, must increase the density of setting of LED light source, certainly will aggravate by light inlet side speck, energy consumption improves, and heat dissipation problem is outstanding.
For large-sized display screen (computer, TV and mobile phone etc.), at equal light source, arrange under prerequisite, emitting brightness homogeneity, light inlet side dark space size and these indexs of speck size are improved constantly.Especially for the mobile phone display screen of large-size, in general, light source is only arranged on a side, be that light inlet side is one-sided formula, it not the bilateral formula being oppositely arranged, the total length of light guide plate leading portion, light guide plate stage casing and light guide plate back segment is over 15 centimetres, light inlet side based in light guide plate arranges laciniation (being groove structure), how could realize light guide plate leading portion, light guide plate stage casing and the bright dipping of light guide plate back segment evenly, light inlet side dark space is very little and be convenient to machine-shaping, is large-size light-conducting plate urgent problem.
Summary of the invention
The utility model technical issues that need to address are, light inlet side based in light guide plate arranges laciniation (being groove structure): one, overcome groove in prior art starts at exiting surface, to extend from incidence surface always, although cause the dark space of light guide plate leading portion very little, the deficiency dying down in light guide plate back segment emitting brightness; Its two, overcome in prior art groove very short from putting in light inlet lateral guide tabula rasa, although cause the emitting brightness of light guide plate back segment can obviously not die down, at light guide plate leading portion, present the deficiency of obvious dark space, provide a kind of emitting brightness uniform light guide plate.Can realize light guide plate leading portion, light guide plate stage casing and the bright dipping of light guide plate back segment evenly, light inlet side dark space is very little and be convenient to machine-shaping, is applicable to large-size light-conducting plate.
In order to realize above-mentioned task, the uniform light guide plate of a kind of emitting brightness of the utility model adopts following technical proposals:
The uniform light guide plate of emitting brightness, comprises the exiting surface and the reflective surface that are oppositely arranged, and a wherein common end of exiting surface and reflective surface is the incidence surface that light relative with light source, light source incides light guide plate; The end face relative with incidence surface is rear end face; On exiting surface, from incidence surface, stretch to and in light guide plate, be shaped with numerous grooves, in described light guide plate, for the edge of light guide plate, the length that described groove stretches in light guide plate from incidence surface is 1/4th to 1/3rd of incidence surface and rear end face vertical range; Adjacent described groove is every at regular intervals.
Technique scheme is further elaborated:
Described groove is vertical with incidence surface.
The cross section that described groove is vertical with its length is U-shaped or V-type.
Tail end at the above groove of exiting surface has to the convergence of centre convergence most advanced and sophisticated.
The bottom of described groove has upwards the ramp of drawing close with exiting surface at tail end.
Compared with the existing technology, the beneficial effects of the utility model are:
One, because groove of the present utility model has suitable length, the length of stretching in light guide plate from incidence surface accounts for 1/4th to 1/3rd of incidence surface and rear end face vertical range, so, both overcome groove in prior art starts at exiting surface, to extend from incidence surface always, although cause the dark space of light guide plate leading portion very little, the deficiency dying down in light guide plate back segment emitting brightness; The groove that has overcome again prior art is very short from putting in light inlet lateral guide tabula rasa, although cause the emitting brightness of light guide plate back segment can obviously not die down, presents the deficiency of obvious dark space at light guide plate leading portion.It is even that the utility model can be realized light guide plate leading portion, light guide plate stage casing and light guide plate back segment emitting brightness, and especially the emitting brightness of light guide plate back segment improves 15% left and right; Meanwhile, light inlet side dark space is very little.Realized the unification that light guide plate optical quality is good Yu number of light sources is few, power consumption is few.
Its two, be convenient to machine-shaping.
Its three, be applicable to large-size light-conducting plate.
Accompanying drawing explanation
Fig. 1 is the light guide plate floor map of one of prior art;
Fig. 2 is two light guide plate floor map of prior art;
Fig. 3 is three light guide plate floor map of prior art;
Fig. 4 is four light guide plate floor map of prior art;
Fig. 5 is light guide plate schematic perspective view of the present utility model;
Fig. 6 is light guide plate floor map of the present utility model;
Fig. 7 is the A-A cut-open view (through amplifying) of Fig. 6;
Fig. 8 is the B-B cut-open view (through amplifying) of Fig. 6.
In figure: 10, light guide plate; 11, incidence surface; 12, light source; 13, speck; 14, dark space; 15, exiting surface; 16, rear end face; 17, groove; 171, convergence is most advanced and sophisticated; 172, ramp; 18, spacing.
Embodiment
Below in conjunction with accompanying drawing, introduce embodiment of the present utility model.
If Fig. 5 is to as shown in Fig. 8, the uniform light guide plate of a kind of emitting brightness, comprises the exiting surface 15 and the reflective surface that are oppositely arranged, and a wherein common end of exiting surface 15 and reflective surface is the incidence surface 11 that light relative with light source, light source incides light guide plate; The end face relative with incidence surface 11 is rear end face 16; On exiting surface 15, from incidence surface 11, stretch to and in light guide plate, be shaped with numerous grooves 17, in described light guide plate, for the edge of light guide plate, the length that described groove 17 stretches in light guide plate from incidence surface 11 is incidence surface 11 and 1/4th to 1/3rd of rear end face 16 vertical ranges; Adjacent described groove 17 is every at regular intervals 18.
Described groove 17 is vertical with incidence surface 11.
The cross section that described groove 17 is vertical with its length is U-shaped or V-type.
Tail end at exiting surface 45 the above groove 17 has the convergence tip 171 to centre convergence.
The bottom of described groove 17 has upwards the ramp 172 of drawing close with exiting surface at tail end.
For large-size light-conducting plate, the wide size of its long * surpasses 200*100 millimeter, in general, if the plate length of light guide plate is 200 millimeters, incidence surface 11 is positioned at the long one end of plate, the long other end of plate is rear end face 16, and incidence surface 11 is long 200 millimeters of plate with the vertical range of rear end face 16, described groove 17 from incidence surface 11 stretch to length in light guide plate be 50 millimeters to 70 millimeter.The degree of depth of described groove 17 (being that the end of groove 17 is to surperficial distance) is generally 20 microns of left and right, and the spacing 18 that adjacent described groove 17 is separated with is 20 microns of left and right.The length of convergence most advanced and sophisticated 171 be 5 millimeters to 7 millimeter, the length of ramp 172 be 10 millimeters to 15 millimeter.The light guide plate with this structure groove can improve the homogeneity of light guide plate leading portion, light guide plate stage casing and light guide plate back segment emitting brightness, and especially the emitting brightness of light guide plate back segment improves 15% left and right; Meanwhile, light inlet side dark space is very little.Realized the unification that light guide plate optical quality is good Yu number of light sources is few, power consumption is few.
The homogeneity contrast of the emitting brightness of the utility model and prior art is as follows;
1) emitting brightness of light guide plate back segment improves 15% more always than prior art (groove reaches rear end face from incidence surface).
2) dark space of light guide plate leading portion narrows down to 20% of prior art (groove puts in from incidence surface to light guide plate very short, is limited to incidence surface) near.
Embodiment of the present utility model just illustrates its embodiment, does not lie in and limits its technical scheme.The technician of the industry can make some and revise under the inspiration of the present embodiment, and the equivalence of doing according to the utility model the scope of the claims therefore all changes or modifies, and all belongs within the scope of the utility model Patent right requirement.
Claims (5)
1. the uniform light guide plate of emitting brightness, comprises the exiting surface and the reflective surface that are oppositely arranged, and a wherein common end of exiting surface and reflective surface is the incidence surface that light relative with light source, light source incides light guide plate; The end face relative with incidence surface is rear end face; It is characterized in that: on exiting surface, from incidence surface, stretch to and in light guide plate, be shaped with numerous grooves, in described light guide plate, for the edge of light guide plate, the length that described groove stretches in light guide plate from incidence surface is 1/4th to 1/3rd of incidence surface and rear end face vertical range; Adjacent described groove is every at regular intervals.
2. the uniform light guide plate of a kind of emitting brightness according to claim 1, is characterized in that: described groove is vertical with incidence surface.
3. the uniform light guide plate of a kind of emitting brightness according to claim 1, is characterized in that: the cross section that described groove is vertical with its length is U-shaped or V-type.
4. the uniform light guide plate of a kind of emitting brightness according to claim 1, is characterized in that: the tail end at the above groove of exiting surface has to the convergence of centre convergence most advanced and sophisticated.
5. the uniform light guide plate of a kind of emitting brightness according to claim 1, is characterized in that: the bottom of described groove has upwards the ramp of drawing close with exiting surface at tail end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306488.6U CN203981914U (en) | 2014-06-11 | 2014-06-11 | The uniform light guide plate of a kind of emitting brightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306488.6U CN203981914U (en) | 2014-06-11 | 2014-06-11 | The uniform light guide plate of a kind of emitting brightness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203981914U true CN203981914U (en) | 2014-12-03 |
Family
ID=51979348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420306488.6U Expired - Lifetime CN203981914U (en) | 2014-06-11 | 2014-06-11 | The uniform light guide plate of a kind of emitting brightness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203981914U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090326A (en) * | 2014-06-11 | 2014-10-08 | 东莞市现代精工实业有限公司 | Light guide plate with uniform light emitting brightness |
-
2014
- 2014-06-11 CN CN201420306488.6U patent/CN203981914U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090326A (en) * | 2014-06-11 | 2014-10-08 | 东莞市现代精工实业有限公司 | Light guide plate with uniform light emitting brightness |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103901528B (en) | Planar light source device and its light guide plate | |
| CN202267758U (en) | Light guide plate, backlight source and display device | |
| CN102128398A (en) | Backlight module and liquid crystal display device | |
| CN102620193A (en) | Sectional light emitting diode (LED) backlight module and liquid crystal display device | |
| CN103149626B (en) | Light guide plate, backlight module and liquid crystal indicator | |
| CN201606740U (en) | LED side backlight module, LCD (liquid crystal display) device and LCD TV | |
| CN104597553B (en) | Light guide plate | |
| CN104456425A (en) | Planar light source | |
| CN103885117A (en) | Light guide plate, backlight module and liquid crystal module | |
| CN203759289U (en) | Lateral-in backlight source, direct-down backlight source and display device | |
| CN202813036U (en) | Direct down type backlight module and liquid crystal display device | |
| CN106896576A (en) | A kind of ultra-thin downward back photo structure | |
| CN104090326A (en) | Light guide plate with uniform light emitting brightness | |
| CN103047585A (en) | Lateral incidence type backlight module and liquid crystal television | |
| CN101761829B (en) | Backlight module and display device using same | |
| CN102033260A (en) | Light guide plate and backlight module employing same | |
| CN206209146U (en) | Light guide plate, backlight module and display device | |
| CN203784748U (en) | Vehicle-mounted sound system lens type LED (light emitting diode) backlight module | |
| CN202056688U (en) | Backlight source and display device | |
| CN203981914U (en) | The uniform light guide plate of a kind of emitting brightness | |
| TWM409450U (en) | Light guide plate with inner laser engraving | |
| CN206546451U (en) | A kind of incidence surface structure of light guide plate | |
| CN103994366B (en) | A kind of down straight aphototropism mode set and display device | |
| CN203324502U (en) | Light guide plate with microstructures | |
| CN201983118U (en) | Direct backlight source structure and bottom reflection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141203 |